WO2016038265A1 - Motor vehicle comprising a short exhaust line and a screen for the thermal protection of the fuel tank of the vehicle - Google Patents

Motor vehicle comprising a short exhaust line and a screen for the thermal protection of the fuel tank of the vehicle Download PDF

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Publication number
WO2016038265A1
WO2016038265A1 PCT/FR2015/052199 FR2015052199W WO2016038265A1 WO 2016038265 A1 WO2016038265 A1 WO 2016038265A1 FR 2015052199 W FR2015052199 W FR 2015052199W WO 2016038265 A1 WO2016038265 A1 WO 2016038265A1
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WO
WIPO (PCT)
Prior art keywords
fuel tank
vehicle
thermal protection
screen
tunnel
Prior art date
Application number
PCT/FR2015/052199
Other languages
French (fr)
Inventor
Germain Convers
Yannick Fourcaudot
David Saillard
Original Assignee
Peugeot Citroen Automobiles Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Peugeot Citroen Automobiles Sa filed Critical Peugeot Citroen Automobiles Sa
Publication of WO2016038265A1 publication Critical patent/WO2016038265A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03328—Arrangements or special measures related to fuel tanks or fuel handling
    • B60K2015/03421—Arrangements or special measures related to fuel tanks or fuel handling to protect the fuel tank against heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/063—Arrangement of tanks
    • B60K2015/0638—Arrangement of tanks the fuel tank is arranged in the rear of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2410/00—Constructional features of vehicle sub-units
    • B60Y2410/114—Shields, e.g. for heat protection

Definitions

  • the invention relates to a vehicle, such as a motor vehicle, equipped with an exhaust line of the burnt gases during combustion in the engine of the vehicle and thermal protection screens of the exhaust line .
  • such a vehicle has its chassis having a floor extending substantially along the vehicle in a longitudinal direction and a tunnel arranged in the floor extending in this longitudinal direction.
  • This tunnel is shaped to receive a combustion gas exhaust line and connected at the output of at least one cylinder of the heat engine disposed in a front portion of the vehicle, which exhaust line comprises in particular a duct of exhaust and at least one silencer housed in the tunnel.
  • the tunnel has a substantially U-shaped inverted cross-sectional shape considering the vehicle in rolling condition and a thermal protection screen is positioned along the exhaust line between the latter and the tunnel.
  • the exhaust duct is extended behind the vehicle by a double elbow portion and a second longitudinal exhaust duct passing under the fuel tank of the vehicle housed under the rear part of the floor, the second exhaust duct generally being connected to an expansion vessel comprising a flue gas outlet cannula.
  • a thermal protection screen is interposed between the fuel tank and the double bent portion and the second exhaust duct of the exhaust line.
  • Such an exhaust line with thermal protection screens is described in particular in JP 2004324474.
  • the double bent portion and the second exhaust duct of the exhaust line pass between two aerodynamic side shields attached to the fuel tank of the vehicle.
  • Such a design has the disadvantage of requiring a tunnel extending substantially all along the floor of the vehicle to receive the long exhaust line and thermal protection screens all along the exhaust line to ensure a thermal protection of this line, the fuel tank and the aerodynamic side shields of the fuel tank, which increases the assembly time on the production line of vehicles and therefore increases the manufacturing costs of these vehicles.
  • the vehicle such as a motor vehicle, comprising a tunnel arranged in the floor of the vehicle in a longitudinal direction of the latter, a connected exhaust gas exhaust line at the outlet of at least one cylinder of the heat engine arranged in a front part of the vehicle and comprising an exhaust duct and at least one silencer housed in the tunnel, a thermal protection screen disposed between the tunnel and the exhaust line , and a fuel tank disposed under the floor at the rear of the vehicle, is characterized in that the exhaust line of the exhaust line has its combustion gas outlet cannula located in front of the fuel tank and in that a thermal protection screen is attached under the fuel tank and is shaped to deflect the hot combustion gases coming out of the cannula towards the ground and to prevent the reserve from warming up r fuel.
  • the thermal protection screen of the fuel tank comprises a flat rear portion fixed under the fuel tank, also forming aerodynamic screen, and a front portion having a convex portion fuel tank side defining a cavity facing the cannula to deflect hot combustion gases to the ground.
  • the thermal protection screen of the fuel tank is fixed between two aerodynamic side screens fixed under the fuel tank and comprises two longitudinal edges respectively adjacent to two internal longitudinal edges of the two side screens and which each comprise a portion an elongate member with a convex external profile directed towards the ground so as to prevent the hot combustion gases that can circulate transversely to the vehicle from infiltrating between each side screen and the underside of the fuel tank.
  • the elongate portion with convex outer profile of each longitudinal edge of the thermal shield of the fuel tank protrudes from below the plane containing the adjacent side screen of the tank.
  • the thermal protection screen of the fuel tank comprises a thermal protection wing secured to one of the longitudinal edges of this screen, extending over one of the side screens of the fuel tank. and along a corresponding side of this tank.
  • the thermal protection screen of the tunnel has its rear end adjacent to the front part and below this part of the thermal protection screen of the fuel tank.
  • the thermal protection screen of the fuel tank and the thermal protection screen of the tunnel are made of aluminum.
  • FIG. 1 is a bottom view of the front floor of a motor vehicle showing a short exhaust line forming part of the invention
  • FIG. 2 is a view from below of the rear floor of the vehicle showing the heat shield for protecting the fuel tank of the invention
  • FIG. 3 is a perspective view showing the fuel tank to which the thermal protection screen of the invention is attached;
  • FIG. 4 is a sectional view along the line IV-IV of Figure 2;
  • FIG. 5 is a sectional view similar to that of Figure 4 and showing an implantation in the longitudinal direction of the vehicle of the fuel tank different from that of Figure 4;
  • FIG. 6 is a sectional view along the line VI-VI of FIG. 2.
  • the reference 1 designates a floor forming part of a motor vehicle frame and which extends substantially along the vehicle along a longitudinal axis.
  • a tunnel 2 is arranged in the floor 1 extending along the longitudinal axis of the vehicle.
  • the tunnel 2 is shaped to receive an exhaust line 3 of the flue gases during combustion in the heat engine 4, partially shown, housed in an engine compartment of the front portion AV of the vehicle.
  • the exhaust line 3 comprises in particular an exhaust duct 5 ending towards the rear of the vehicle by a cannula 6 for output of combustion flue gases and at least one silencer 7, housed in the tunnel 2.
  • the tunnel 2 has in cross section a general shape of inverted U which is turned towards the ground or the road when the vehicle is in rolling condition.
  • a thermal protection screen 8 partially shown in FIGS. 4 and 5, is positioned along the exhaust line 3 between the tunnel 2 and this exhaust line, the thermal protection screen 8 being made of aluminum.
  • the duct 5 of the exhaust line 3 is connected by an exhaust pipe to at least one cylinder of the engine 4. In the case of a four-cylinder engine, the duct 5 is connected to the cylinders through four exhaust pipes.
  • the vehicle is also equipped with a fuel tank 9 arranged and fixed by any appropriate means under the rear part 10 of the floor 1, usually under the trunk floor of the vehicle.
  • the invention is in the context of vehicles where the SCR system for "Selective Catalytic Reduction" in English translated into French by selective catalytic reduction, is arranged in the engine compartment, at the front of the engine 4 of the vehicle .
  • the exhaust silencer 7 can be implanted under the tunnel 2 and the cannula 6 exhaust outlet of the duct 5 can be disposed further towards the front of the vehicle at a location in front of the tank 9 of the vehicle as best shown in Figures 1 and 2, thus leading to an exhaust line said short arranged in the tunnel 2 extending longitudinally only along the front portion 1 1 of the floor 1.
  • the invention further provides a thermal shield 12 which is fixed under the tank 9, more precisely to the lower face 9a thereof and which is shaped to deflect to the ground the hot combustion gases leaving the cannula 6.
  • the heat shield 12 is made of aluminum and comprises a flat rear portion 13 fixed to the underside 9a of the fuel tank 9 by any appropriate means, such as for example fastening screws 14, which part plane 13 also forms an aerodynamic screen of the tank 9.
  • the heat shield 12 further comprises a front portion 15 in extension of the flat rear portion 13 and which has a convex portion 16 disposed on the reservoir side 9 so as to define a cavity 17 located opposite the cannula 6 to deflect the hot combustion gases exiting this cannula towards the ground and, consequently, avoiding heating of the fuel tank 9.
  • the curved portion 16 of the protective screen 12 is located between the cannula 6 and a front part of the fuel tank 9 being close to the latter.
  • the thermal protection screen 12 is fixed between two aerodynamic side shields 18, 19 located respectively to the left and to the right of the vehicle by considering the latter in its direction of travel in the forward direction and which are fixed in particular under the bottom face 9a of the fuel tank 9 by any appropriate means, such as for example fixing screws 20.
  • the thermal protection screen 12 has its flat rear portion 13 located substantially in the same plane as that containing the two aerodynamic side shields 18,19 of the fuel tank 9 and comprises two longitudinal edges 21, 22 respectively adjacent to two internal edges 23,24 of the two aerodynamic side shields 18,19 by defining between them a relatively small clearance may nevertheless allow to infiltrate hot combustion gases deviated in particular by the curved portion 16 of the thermal protection screen 12 in a direction substantially transverse to the longitudinal direction of the vehicle.
  • each of the two longitudinal edges 21, 22 of the thermal protection screen 12 comprises an elongate portion 21 a, 22a with a convex external profile directed towards the ground while considering the vehicle in rolling condition.
  • the convex outer profile 21a, 22a of each elongate portion 21, 22 has in cross section an arcuate shape approximately in a semicircle.
  • Each elongated portion with convex external profile 21a, 22a of the thermal protection screen 12 protrudes from below the plane containing the adjacent side screen 18,19 corresponding to a height h such that, when the hot combustion gases deflected by the convex portion 16 of the thermal protection shield 12 or coming from the cannula 6 in a direction substantially transverse to the longitudinal direction of the vehicle, are deflected by the convex elongated portions 21a, 22a as symbolized by the arrows F1 in Figure 6, thereby preventing the hot gases from entering the clearances between respective edges 21, 23; 22,24 thermal and aerodynamic screens 12,18,19 and, therefore, to infiltrate between the aerodynamic screens 18,19 and the underside 9a of the fuel tank 9.
  • the thermal protection screen 12 comprises a thermal protection wing 25 integral with one of the longitudinal edges 21, 22 of the screen 12 and which extend
  • This wing 25 may be useful to adapt to the shape of the corresponding side of the fuel tank 9 and provide optimum protection against warming of the tank 9 in the case where hot gases would manage to pass through the game between l aerodynamic screen 19 and the adjacent longitudinal edge 22 of the thermal protection screen 12, despite the presence of the elongate outer profile portion 22a of the edge 22.
  • the thermal protection screen 12 of the fuel tank 9 is made by stamping.
  • the thermal protection screen 8 disposed between the tunnel 2 and the short exhaust line 3 has its rear end adjacent and below the front portion 15 of the thermal protection screen 12 of the fuel tank 9 .
  • the thermal protection screen 12 of the fuel tank 9 allows perfect modularity on the basis of the vehicle. Indeed, depending on the vehicles, the fuel tank 9 can occupy an advanced position relative to the front portion 1 1 of the floor 1 as shown in Figure 5 compared to the position of the tank shown in Figure 4 where the tank 9 is further back from that front part.
  • a module or interface is removably attached to the rear end portion of the tunnel 2 as symbolized in M in Figure 5 to shorten somewhat this end portion and compensate the advancing distance of the fuel tank 9 relative to the cannula 6 of the exhaust line 3 and allow the heat shield 8 to be adapted in length to the tunnel 2 so that its end is adjacent to and below the front portion 15 of the protective screen
  • This invention avoids a variety of aerodynamic screens of the fuel tank 9 between a short exhaust line 3 and a long exhaust line.
  • the presence of the thermal protection screen 12 of the fuel tank 9 will impose an aerodynamic screen 18 to the left of the vehicle, but the aerodynamic screen 19 located to the right of this vehicle will be the same both in the case of a long exhaust line of a vehicle than in the case of a short exhaust line of another vehicle. This reduces the number of specific aerodynamic screens in the assembly line of motor vehicles.

Abstract

The invention relates to a motor vehicle comprising a short exhaust line and a screen for the thermal protection of the fuel tank of the vehicle. According to the invention, the vehicle is characterised in that the combustion gas discharge nozzle (6) of the exhaust pipe (5) of the exhaust line (3) is located in front of the fuel tank (9) and in that a thermal protection screen (12) is secured beneath the fuel tank (9) and is shaped to divert the hot combustion gases leaving the nozzle (6) towards the ground. The invention is suitable for use in the automotive industry.

Description

"VEHICULE AUTOMOBILE A LIGNE D'ECHAPPEMENT COURTE ET ECRAN DE PROTECTION THERMIQUE DU RESERVOIR DE CARBURANT DE CE VEHICULE".  "AUTOMOTIVE VEHICLE WITH SHORT EXHAUST LINE AND THERMAL PROTECTION SCREEN OF THE FUEL TANK OF THIS VEHICLE".
[0001 ] L'invention concerne un véhicule, tel qu'un véhicule automobile, équipé d'une ligne d'échappement des gaz brûlés durant la combustion dans le moteur thermique du véhicule et d'écrans de protection thermique de la ligne d'échappement. The invention relates to a vehicle, such as a motor vehicle, equipped with an exhaust line of the burnt gases during combustion in the engine of the vehicle and thermal protection screens of the exhaust line .
[0002] Plus particulièrement, un tel véhicule a son châssis comportant un plancher s'étendant sensiblement le long du véhicule suivant une direction longitudinale et un tunnel aménagé dans le plancher en s'étendant suivant cette direction longitudinale. [0003] Ce tunnel est conformé pour recevoir une ligne d'échappement de gaz de combustion et reliée en sortie d'au moins un cylindre du moteur thermique disposé dans une partie avant du véhicule, laquelle ligne d'échappement comporte notamment un conduit d'échappement et au moins un silencieux logés dans le tunnel. More particularly, such a vehicle has its chassis having a floor extending substantially along the vehicle in a longitudinal direction and a tunnel arranged in the floor extending in this longitudinal direction. This tunnel is shaped to receive a combustion gas exhaust line and connected at the output of at least one cylinder of the heat engine disposed in a front portion of the vehicle, which exhaust line comprises in particular a duct of exhaust and at least one silencer housed in the tunnel.
[0004] Le tunnel présente en section transversale une forme sensiblement en U inversé en considérant le véhicule en condition de roulage et un écran de protection thermique est positionné le long de la ligne d'échappement entre celle-ci et le tunnel. The tunnel has a substantially U-shaped inverted cross-sectional shape considering the vehicle in rolling condition and a thermal protection screen is positioned along the exhaust line between the latter and the tunnel.
[0005] Le conduit d'échappement est prolongé en arrière du véhicule par une partie à double coude et un second conduit longitudinal d'échappement passant sous le réservoir de carburant du véhicule logé sous la partie arrière du plancher, le second conduit d'échappement étant généralement raccordé à un pot de détente comportant une canule de sortie des gaz de combustion. The exhaust duct is extended behind the vehicle by a double elbow portion and a second longitudinal exhaust duct passing under the fuel tank of the vehicle housed under the rear part of the floor, the second exhaust duct generally being connected to an expansion vessel comprising a flue gas outlet cannula.
[0006] Un écran de protection thermique est interposé entre le réservoir de carburant et la partie doublement coudée et le second conduit d'échappement de la ligne d'échappement. [0007] Une telle ligne d'échappement à écrans de protection thermique est décrite notamment dans le document JP 2004324474. A thermal protection screen is interposed between the fuel tank and the double bent portion and the second exhaust duct of the exhaust line. Such an exhaust line with thermal protection screens is described in particular in JP 2004324474.
[0008] Généralement, la partie doublement coudée et le second conduit d'échappement de la ligne d'échappement passent entre deux écrans latéraux aérodynamiques fixés sous le réservoir de carburant du véhicule. [0009] Une telle conception a pour inconvénient de nécessiter un tunnel s'étendant pratiquement tout le long du plancher du véhicule pour recevoir la ligne d'échappement longue et des écrans de protection thermique tout le long de la ligne d'échappement pour assurer une protection thermique de cette ligne, du réservoir de carburant et des écrans latéraux aérodynamiques du réservoir de carburant, ce qui augmente le temps de montage sur la ligne de production des véhicules et augmente par conséquent les coûts de fabrication de ces véhicules. Generally, the double bent portion and the second exhaust duct of the exhaust line pass between two aerodynamic side shields attached to the fuel tank of the vehicle. Such a design has the disadvantage of requiring a tunnel extending substantially all along the floor of the vehicle to receive the long exhaust line and thermal protection screens all along the exhaust line to ensure a thermal protection of this line, the fuel tank and the aerodynamic side shields of the fuel tank, which increases the assembly time on the production line of vehicles and therefore increases the manufacturing costs of these vehicles.
[0010] La présente invention a pour but de pallier les inconvénients ci-dessus des lignes d'échappement dites longues de véhicules automobiles. [001 1 ] A cet effet, selon l'invention, le véhicule, tel qu'un véhicule automobile, comprenant un tunnel aménagé dans le plancher du véhicule suivant une direction longitudinale de ce dernier, une ligne d'échappement de gaz de combustion reliée en sortie d'au moins un cylindre du moteur thermique disposé dans une partie avant du véhicule et comportant un conduit d'échappement et au moins un silencieux logés dans le tunnel, un écran de protection thermique disposé entre le tunnel et la ligne d'échappement, et un réservoir de carburant disposé sous le plancher en partie arrière du véhicule, est caractérisé en ce que le conduit d'échappement de la ligne d'échappement a sa canule de sortie des gaz de combustion située devant le réservoir de carburant et en ce qu'un écran de protection thermique est fixé sous le réservoir de carburant et est conformé pour dévier vers le sol les gaz chauds de combustion sortant de la canule et éviter réchauffement du réservoir de carburant. The present invention aims to overcome the above drawbacks of so-called long exhaust lines of motor vehicles. [001 1] For this purpose, according to the invention, the vehicle, such as a motor vehicle, comprising a tunnel arranged in the floor of the vehicle in a longitudinal direction of the latter, a connected exhaust gas exhaust line at the outlet of at least one cylinder of the heat engine arranged in a front part of the vehicle and comprising an exhaust duct and at least one silencer housed in the tunnel, a thermal protection screen disposed between the tunnel and the exhaust line , and a fuel tank disposed under the floor at the rear of the vehicle, is characterized in that the exhaust line of the exhaust line has its combustion gas outlet cannula located in front of the fuel tank and in that a thermal protection screen is attached under the fuel tank and is shaped to deflect the hot combustion gases coming out of the cannula towards the ground and to prevent the reserve from warming up r fuel.
[0012] De préférence, l'écran de protection thermique du réservoir de carburant comprend une partie arrière plane fixée sous le réservoir de carburant, formant également écran aérodynamique, et une partie avant comportant une portion bombée côté réservoir de carburant définissant une cavité en regard de la canule pour dévier les gaz chauds de combustion vers le sol. Preferably, the thermal protection screen of the fuel tank comprises a flat rear portion fixed under the fuel tank, also forming aerodynamic screen, and a front portion having a convex portion fuel tank side defining a cavity facing the cannula to deflect hot combustion gases to the ground.
[0013] Avantageusement, l'écran de protection thermique du réservoir de carburant est fixé entre deux écrans latéraux aérodynamiques fixés sous le réservoir de carburant et comprend deux bords longitudinaux adjacents respectivement à deux bords longitudinaux internes des deux écrans latéraux et qui comportent chacun une partie longiligne à profil externe convexe dirigée vers le sol de manière à éviter aux gaz chauds de combustion pouvant circuler transversalement au véhicule de s'infiltrer entre chaque écran latéral et le dessous du réservoir de carburant. [0014] Avantageusement, la partie longiligne à profil externe convexe de chaque bord longitudinal de l'écran de protection thermique du réservoir de carburant fait saillie d'en dessous du plan contenant l'écran latéral adjacent de ce réservoir. Advantageously, the thermal protection screen of the fuel tank is fixed between two aerodynamic side screens fixed under the fuel tank and comprises two longitudinal edges respectively adjacent to two internal longitudinal edges of the two side screens and which each comprise a portion an elongate member with a convex external profile directed towards the ground so as to prevent the hot combustion gases that can circulate transversely to the vehicle from infiltrating between each side screen and the underside of the fuel tank. Advantageously, the elongate portion with convex outer profile of each longitudinal edge of the thermal shield of the fuel tank protrudes from below the plane containing the adjacent side screen of the tank.
[0015] En outre, l'écran de protection thermique du réservoir de carburant comprend une aile de protection thermique solidaire de l'un des bords longitudinaux de cet écran, s'étendant au dessus de l'un des écrans latéraux du réservoir de carburant et le long d'un côté correspondant de ce réservoir. In addition, the thermal protection screen of the fuel tank comprises a thermal protection wing secured to one of the longitudinal edges of this screen, extending over one of the side screens of the fuel tank. and along a corresponding side of this tank.
[0016] L'écran de protection thermique du tunnel a son extrémité arrière adjacente à la partie avant et en-dessous de cette partie de l'écran de protection thermique du réservoir de carburant. The thermal protection screen of the tunnel has its rear end adjacent to the front part and below this part of the thermal protection screen of the fuel tank.
[0017] Avantageusement, l'écran de protection thermique du réservoir de carburant et l'écran de protection thermique du tunnel sont réalisés en aluminium. Advantageously, the thermal protection screen of the fuel tank and the thermal protection screen of the tunnel are made of aluminum.
[0018] L'invention sera mieux comprise, et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement dans la description explicative qui va suivre faite en référence aux dessins annexés donnés uniquement à titre d'exemple illustrant un mode de réalisation de l'invention et dans lesquels : The invention will be better understood, and other objects, features, details and advantages thereof will appear more clearly in the explanatory description which follows with reference to the accompanying drawings given solely by way of example illustrating a embodiment of the invention and in which:
- la figure 1 est une vue de dessous du plancher avant d'un véhicule automobile montrant une ligne d'échappement courte faisant partie de l'invention ; - Figure 1 is a bottom view of the front floor of a motor vehicle showing a short exhaust line forming part of the invention;
- la figure 2 est une vue de dessous du plancher arrière du véhicule montrant l'écran thermique de protection du réservoir de carburant de l'invention ; FIG. 2 is a view from below of the rear floor of the vehicle showing the heat shield for protecting the fuel tank of the invention;
- la figure 3 est une vue en perspective montrant le réservoir de carburant auquel est fixé l'écran de protection thermique de l'invention ; FIG. 3 is a perspective view showing the fuel tank to which the thermal protection screen of the invention is attached;
- la figure 4 est une vue en coupe suivant la ligne IV-IV de la figure 2 ; - Figure 4 is a sectional view along the line IV-IV of Figure 2;
- la figure 5 est une vue en coupe semblable à celle de la figure 4 et montrant une implantation en direction longitudinale du véhicule du réservoir de carburant différente de celle de la figure 4 ; et - Figure 5 is a sectional view similar to that of Figure 4 and showing an implantation in the longitudinal direction of the vehicle of the fuel tank different from that of Figure 4; and
- la figure 6 est une vue en coupe suivant la ligne VI-VI de la figure 2. [0019] En se reportant aux figures, la référence 1 désigne un plancher faisant partie d'un châssis de véhicule automobile et qui s'étend sensiblement le long du véhicule suivant un axe longitudinal. FIG. 6 is a sectional view along the line VI-VI of FIG. 2. Referring to the figures, the reference 1 designates a floor forming part of a motor vehicle frame and which extends substantially along the vehicle along a longitudinal axis.
[0020] Un tunnel 2 est aménagé dans le plancher 1 en s'étendant suivant l'axe longitudinal du véhicule. Le tunnel 2 est conformé pour recevoir une ligne d'échappement 3 des gaz brûlés durant la combustion dans le moteur thermique 4, partiellement représenté, logé dans un compartiment moteur de la partie avant AV du véhicule. A tunnel 2 is arranged in the floor 1 extending along the longitudinal axis of the vehicle. The tunnel 2 is shaped to receive an exhaust line 3 of the flue gases during combustion in the heat engine 4, partially shown, housed in an engine compartment of the front portion AV of the vehicle.
[0021 ] La ligne d'échappement 3 comprend notamment un conduit d'échappement 5 se terminant vers l'arrière du véhicule par une canule 6 de sortie des gaz brûlés de combustion et au moins un silencieux 7, logés dans le tunnel 2. The exhaust line 3 comprises in particular an exhaust duct 5 ending towards the rear of the vehicle by a cannula 6 for output of combustion flue gases and at least one silencer 7, housed in the tunnel 2.
[0022] Le tunnel 2 présente en section transversale une forme générale de U inversé qui est tourné vers le sol ou la route lorsque le véhicule est en condition de roulage. The tunnel 2 has in cross section a general shape of inverted U which is turned towards the ground or the road when the vehicle is in rolling condition.
[0023] Un écran 8 de protection thermique, représenté partiellement aux figures 4 et 5, est positionné le long de la ligne d'échappement 3 entre le tunnel 2 et cette ligne d'échappement, l'écran de protection thermique 8 étant réalisé en aluminium. A thermal protection screen 8, partially shown in FIGS. 4 and 5, is positioned along the exhaust line 3 between the tunnel 2 and this exhaust line, the thermal protection screen 8 being made of aluminum.
[0024] Le conduit 5 de la ligne d'échappement 3 est raccordé par une tubulure d'échappement à au moins un cylindre du moteur thermique 4. Dans le cas d'un moteur thermique à quatre cylindres, le conduit 5 est raccordé aux cylindres par l'intermédiaire de quatre tubulures d'échappement. [0025] Le véhicule est également équipé d'un réservoir de carburant 9 disposé et fixé par tout moyen approprié sous la partie arrière 10 du plancher 1 , généralement sous le plancher de coffre du véhicule. The duct 5 of the exhaust line 3 is connected by an exhaust pipe to at least one cylinder of the engine 4. In the case of a four-cylinder engine, the duct 5 is connected to the cylinders through four exhaust pipes. The vehicle is also equipped with a fuel tank 9 arranged and fixed by any appropriate means under the rear part 10 of the floor 1, usually under the trunk floor of the vehicle.
[0026] L'invention s'inscrit dans le cadre de véhicules où le système SCR pour « Sélective Catalytic Réduction » en anglais traduit en français par réduction catalytique sélective, est disposé dans le compartiment moteur, à l'avant du moteur 4 du véhicule. The invention is in the context of vehicles where the SCR system for "Selective Catalytic Reduction" in English translated into French by selective catalytic reduction, is arranged in the engine compartment, at the front of the engine 4 of the vehicle .
[0027] Dans ce cadre, le silencieux d'échappement 7 peut être implanté sous le tunnel 2 et la canule 6 de sortie des gaz d'échappement du conduit 5 peut être disposée plus vers l'avant du véhicule à un emplacement devant le réservoir de carburant 9 du véhicule comme cela ressort mieux des figures 1 et 2, conduisant ainsi à une ligne d'échappement dite courte disposée dans le tunnel 2 s'étendant longitudinalement uniquement le long de la partie avant 1 1 du plancher 1 . In this context, the exhaust silencer 7 can be implanted under the tunnel 2 and the cannula 6 exhaust outlet of the duct 5 can be disposed further towards the front of the vehicle at a location in front of the tank 9 of the vehicle as best shown in Figures 1 and 2, thus leading to an exhaust line said short arranged in the tunnel 2 extending longitudinally only along the front portion 1 1 of the floor 1.
[0028] Pour éviter réchauffement du réservoir de carburant 9 par des gaz chauds d'échappement sortant de la canule d'échappement 6 en regard de ce réservoir, l'invention propose en outre un écran de protection thermique 12 qui est fixé sous le réservoir de carburant 9, plus précisément à la face inférieure 9a de celui-ci et qui est conformé pour dévier vers le sol les gaz chauds de combustion sortant de la canule 6. To prevent heating of the fuel tank 9 by hot exhaust gas leaving the exhaust cannula 6 facing this tank, the invention further provides a thermal shield 12 which is fixed under the tank 9, more precisely to the lower face 9a thereof and which is shaped to deflect to the ground the hot combustion gases leaving the cannula 6.
[0029] De préférence, l'écran thermique 12 est réalisé en aluminium et comprend une partie arrière plane 13 fixée à la face inférieure 9a du réservoir de carburant 9 par tout moyen approprié, tel que par exemple des vis de fixation 14, laquelle partie plane 13 forme également un écran aérodynamique du réservoir 9. Preferably, the heat shield 12 is made of aluminum and comprises a flat rear portion 13 fixed to the underside 9a of the fuel tank 9 by any appropriate means, such as for example fastening screws 14, which part plane 13 also forms an aerodynamic screen of the tank 9.
[0030] L'écran thermique 12 comprend en outre une partie avant 15 en prolongement de la partie arrière plane 13 et qui comporte une portion bombée 16 disposée côté réservoir 9 de manière à définir une cavité 17 située en regard de la canule 6 pour dévier les gaz chauds de combustion sortant de cette canule vers le sol et, par conséquent, éviter réchauffement du réservoir de carburant 9. La portion bombée 16 de l'écran de protection 12 est située entre la canule 6 et une partie avant du réservoir de carburant 9 en étant à proximité de cette dernière. The heat shield 12 further comprises a front portion 15 in extension of the flat rear portion 13 and which has a convex portion 16 disposed on the reservoir side 9 so as to define a cavity 17 located opposite the cannula 6 to deflect the hot combustion gases exiting this cannula towards the ground and, consequently, avoiding heating of the fuel tank 9. The curved portion 16 of the protective screen 12 is located between the cannula 6 and a front part of the fuel tank 9 being close to the latter.
[0031 ] Les « partie avant » et « partie arrière » ci-dessus s'entendent en considérant le sens de déplacement du véhicule en marche avant. The "front part" and "rear part" above are understood by considering the direction of movement of the vehicle forward.
[0032] Avantageusement, l'écran de protection thermique 12 est fixé entre deux écrans latéraux aérodynamiques 18,19 situés respectivement à gauche et à droite du véhicule en considérant ce dernier dans son sens de déplacement en marche avant et qui sont fixés notamment sous la face inférieure 9a du réservoir de carburant 9 par tout moyen approprié, tel que par exemple des vis de fixation 20. Advantageously, the thermal protection screen 12 is fixed between two aerodynamic side shields 18, 19 located respectively to the left and to the right of the vehicle by considering the latter in its direction of travel in the forward direction and which are fixed in particular under the bottom face 9a of the fuel tank 9 by any appropriate means, such as for example fixing screws 20.
[0033] L'écran de protection thermique 12 a sa partie arrière plane 13 située sensiblement dans le même plan que celui contenant les deux écrans latéraux aérodynamiques 18,19 du réservoir de carburant 9 et comprend deux bords longitudinaux 21 ,22 adjacents respectivement à deux bords internes 23,24 des deux écrans latéraux aérodynamiques 18,19 en définissant entre eux un jeu relativement faible susceptible néanmoins de laisser s'infiltrer des gaz chauds de combustion déviés notamment par la portion bombée 16 de l'écran de protection thermique 12 suivant une direction sensiblement transversale à la direction longitudinale du véhicule. The thermal protection screen 12 has its flat rear portion 13 located substantially in the same plane as that containing the two aerodynamic side shields 18,19 of the fuel tank 9 and comprises two longitudinal edges 21, 22 respectively adjacent to two internal edges 23,24 of the two aerodynamic side shields 18,19 by defining between them a relatively small clearance may nevertheless allow to infiltrate hot combustion gases deviated in particular by the curved portion 16 of the thermal protection screen 12 in a direction substantially transverse to the longitudinal direction of the vehicle.
[0034] Pour empêcher une telle infiltration de gaz chauds entre chaque écran aérodynamique 18,19 et la face inférieure 9a du réservoir de carburant 9, chacun des deux bords longitudinaux 21 ,22 de l'écran de protection thermique 12 comprend une partie longiligne 21 a,22a à profil externe convexe dirigé vers le sol en considérant le véhicule en condition de roulage. To prevent such hot gas infiltration between each aerodynamic screen 18,19 and the lower face 9a of the fuel tank 9, each of the two longitudinal edges 21, 22 of the thermal protection screen 12 comprises an elongate portion 21 a, 22a with a convex external profile directed towards the ground while considering the vehicle in rolling condition.
[0035] Le profil externe convexe 21 a,22a de chaque partie longiligne 21 ,22 présente en section transversale une forme arquée approximativement en demi-cercle. [0036] Chaque partie longiligne à profil externe convexe 21 a,22a de l'écran de protection thermique 12 fait saillie d'en-dessous du plan contenant l'écran latéral adjacent correspondant 18,19 d'une hauteur h telle que, lorsque les gaz chauds de combustion déviés par la partie bombée 16 de l'écran de protection thermique 12 ou provenant de la canule 6 suivant une direction sensiblement transversale à la direction longitudinale du véhicule, sont déviés par les parties longilignes convexes 21 a,22a comme symbolisé par les flèches F1 en figure 6, empêchant de la sorte les gaz chauds de pénétrer dans les jeux entre bords respectifs 21 ,23 ; 22,24 des écrans thermiques et aérodynamiques 12,18,19 et, par conséquent, de s'infiltrer entre les écrans aérodynamiques 18,19 et la face inférieure 9a du réservoir de carburant 9. [0037] L'écran de protection thermique 12 comprend une aile de protection thermique 25 solidaire de l'un 22 des bords longitudinaux 21 ,22 de l'écran 12 et qui s'étend au-dessus de l'un 19 des écrans latéraux 18,19 du réservoir de carburant 9 et le long du côté correspondant du réservoir 9. The convex outer profile 21a, 22a of each elongate portion 21, 22 has in cross section an arcuate shape approximately in a semicircle. Each elongated portion with convex external profile 21a, 22a of the thermal protection screen 12 protrudes from below the plane containing the adjacent side screen 18,19 corresponding to a height h such that, when the hot combustion gases deflected by the convex portion 16 of the thermal protection shield 12 or coming from the cannula 6 in a direction substantially transverse to the longitudinal direction of the vehicle, are deflected by the convex elongated portions 21a, 22a as symbolized by the arrows F1 in Figure 6, thereby preventing the hot gases from entering the clearances between respective edges 21, 23; 22,24 thermal and aerodynamic screens 12,18,19 and, therefore, to infiltrate between the aerodynamic screens 18,19 and the underside 9a of the fuel tank 9. The thermal protection screen 12 comprises a thermal protection wing 25 integral with one of the longitudinal edges 21, 22 of the screen 12 and which extends over one of the side screens 18, 19 of the fuel tank 9 and the along the corresponding side of the tank 9.
[0038] Cette aile 25 peut être utile pour s'adapter à la forme du côté correspondant du réservoir de carburant 9 et assurer une protection optimale contre réchauffement du réservoir 9 dans le cas où des gaz chauds parviendraient à passer au travers du jeu entre l'écran aérodynamique 19 et le bord longitudinal adjacent 22 de l'écran de protection thermique 12, malgré la présence de la partie longiligne à profil externe 22a du bord 22. This wing 25 may be useful to adapt to the shape of the corresponding side of the fuel tank 9 and provide optimum protection against warming of the tank 9 in the case where hot gases would manage to pass through the game between l aerodynamic screen 19 and the adjacent longitudinal edge 22 of the thermal protection screen 12, despite the presence of the elongate outer profile portion 22a of the edge 22.
[0039] L'écran de protection thermique 12 du réservoir de carburant 9 est réalisé par emboutissage. [0040] L'écran de protection thermique 8 disposé entre le tunnel 2 et la ligne d'échappement courte 3 a son extrémité arrière adjacente et en-dessous de la partie avant 15 de l'écran de protection thermique 12 du réservoir de carburant 9. The thermal protection screen 12 of the fuel tank 9 is made by stamping. The thermal protection screen 8 disposed between the tunnel 2 and the short exhaust line 3 has its rear end adjacent and below the front portion 15 of the thermal protection screen 12 of the fuel tank 9 .
[0041 ] L'écran de protection thermique 12 du réservoir de carburant 9 permet une modularité parfaite sur la base du véhicule. En effet, en fonction des véhicules, le réservoir de carburant 9 peut occuper une position avancée par rapport à la partie avant 1 1 du plancher 1 comme cela ressort de la figure 5 comparativement à la position de ce réservoir représentée en figure 4 où le réservoir 9 est plus reculé par rapport à cette partie avant. Dans ces conditions, un module ou interface est amoviblement fixé à la partie d'extrémité arrière du tunnel 2 comme symbolisé en M en figure 5 pour raccourcir en quelque sorte cette partie d'extrémité et compenser la distance d'avancée du réservoir de carburant 9 relativement à la canule 6 de la ligne d'échappement 3 et permettre à l'écran thermique 8 d'être adapté en longueur au tunnel 2 afin que son extrémité soit adjacente et en-dessous de la partie avant 15 de l'écran de protection thermique 12 du réservoir de carburant 9. [0042] L'invention permet d'éviter une diversité d'écrans aérodynamiques du réservoir de carburant 9 entre une ligne d'échappement courte 3 et une ligne d'échappement longue. Ainsi, dans le cas d'une ligne d'échappement courte, la présence de l'écran de protection thermique 12 du réservoir de carburant 9 imposera un écran aérodynamique 18 à gauche du véhicule, mais l'écran aérodynamique 19 situé à droite de ce véhicule sera le même aussi bien dans le cas d'une ligne d'échappement longue d'un véhicule que dans le cas d'une ligne d'échappement courte d'un autre véhicule. On réduit ainsi le nombre d'écrans aérodynamiques spécifiques en ligne de montage de véhicules automobiles. The thermal protection screen 12 of the fuel tank 9 allows perfect modularity on the basis of the vehicle. Indeed, depending on the vehicles, the fuel tank 9 can occupy an advanced position relative to the front portion 1 1 of the floor 1 as shown in Figure 5 compared to the position of the tank shown in Figure 4 where the tank 9 is further back from that front part. Under these conditions, a module or interface is removably attached to the rear end portion of the tunnel 2 as symbolized in M in Figure 5 to shorten somewhat this end portion and compensate the advancing distance of the fuel tank 9 relative to the cannula 6 of the exhaust line 3 and allow the heat shield 8 to be adapted in length to the tunnel 2 so that its end is adjacent to and below the front portion 15 of the protective screen This invention avoids a variety of aerodynamic screens of the fuel tank 9 between a short exhaust line 3 and a long exhaust line. Thus, in the case of a short exhaust line, the presence of the thermal protection screen 12 of the fuel tank 9 will impose an aerodynamic screen 18 to the left of the vehicle, but the aerodynamic screen 19 located to the right of this vehicle will be the same both in the case of a long exhaust line of a vehicle than in the case of a short exhaust line of another vehicle. This reduces the number of specific aerodynamic screens in the assembly line of motor vehicles.

Claims

REVENDICATIONS
1 . Véhicule, tel qu'un véhicule automobile, comprenant un tunnel (2) aménagé dans le plancher (1 ) du véhicule suivant une direction longitudinale de ce dernier, une ligne (3) d'échappement de gaz de combustion reliée en sortie d'au moins un cylindre du moteur thermique (4) disposé dans une partie avant du véhicule et comportant un conduit d'échappement (5) et au moins un silencieux (7) logés dans le tunnel (2), un écran de protection thermique (8) disposé entre le tunnel (2) et la ligne d'échappement (3), et un réservoir de carburant (9) disposé sous le plancher (1 ) en partie arrière du véhicule, caractérisé en ce que le conduit d'échappement (5) de la ligne d'échappement (3) a sa canule (6) de sortie des gaz de combustion située devant le réservoir de carburant (9) et en ce qu'un écran de protection thermique (12) est fixé sous le réservoir de carburant (9) et est conformé pour dévier vers le sol les gaz chauds de combustion sortant de la canule (6) et éviter réchauffement du réservoir de carburant (9). 1. Vehicle, such as a motor vehicle, comprising a tunnel (2) arranged in the floor (1) of the vehicle in a longitudinal direction of the latter, a line (3) of combustion gas exhaust connected at the outlet of the minus one cylinder of the heat engine (4) disposed in a front part of the vehicle and having an exhaust duct (5) and at least one silencer (7) housed in the tunnel (2), a heat shield (8) disposed between the tunnel (2) and the exhaust line (3), and a fuel tank (9) disposed under the floor (1) at the rear of the vehicle, characterized in that the exhaust duct (5) from the exhaust line (3) to its flue gas discharge cannula (6) in front of the fuel tank (9) and in that a heat shield (12) is attached under the fuel tank (9) and is shaped to deflect the hot combustion gases exiting the cannula (6) towards the ground and to avoid ter heating of the fuel tank (9).
2. Véhicule selon la revendication 1 , caractérisé en ce que l'écran de protection thermique (12) du réservoir de carburant (9) comprend une partie arrière plane (13) fixée sous le réservoir de carburant(9), formant également écran aérodynamique, et une partie avant (15) comportant une portion (16) bombée côté réservoir de carburant (9) définissant une cavité (17) en regard de la canule (6) pour dévier les gaz chauds de combustion vers le sol. Vehicle according to claim 1, characterized in that the thermal protection screen (12) of the fuel tank (9) comprises a flat rear part (13) fixed under the fuel tank (9), also forming aerodynamic screen. , and a front portion (15) having a portion (16) curved fuel tank side (9) defining a cavity (17) facing the cannula (6) for diverting hot combustion gases to the ground.
3. Véhicule selon la revendication 1 ou 2, caractérisé en ce que l'écran de protection thermique (12) du réservoir de carburant (9) est fixé entre deux écrans latéraux aérodynamiques (18,19) fixés sous le réservoir de carburant (9) et comprend deux bords longitudinaux (21 ,22) adjacents respectivement à deux bords longitudinaux internes (23,24) des deux écrans latéraux (18,19) et qui comportent chacun une partie longiligne à profil externe convexe (21 a,22a) dirigé vers le sol de manière à éviter aux gaz chauds de combustion pouvant circuler transversalement au véhicule de s'infiltrer entre chaque écran latéral (18,19) et le dessous du réservoir de carburant (9). Vehicle according to Claim 1 or 2, characterized in that the heat shield (12) of the fuel tank (9) is fixed between two aerodynamic side shields (18, 19) fastened under the fuel tank (9). ) and comprises two longitudinal edges (21, 22) respectively adjacent to two internal longitudinal edges (23, 24) of the two lateral shields (18, 19) and which each comprise an elongated portion with a convex external profile (21 a, 22a) directed to the ground so as to prevent hot combustion gases that can cross the vehicle from infiltrating between each side screen (18,19) and the underside of the fuel tank (9).
4. Véhicule selon la revendication 3, caractérisé en ce que la partie longiligne à profil externe convexe (21 a,22a) de chaque bord longitudinal (21 ,22) de l'écran de protection thermique (12) du réservoir de carburant (9) fait saillie d'en-dessous du plan contenant l'écran latéral adjacent (18,19) de ce réservoir. 4. Vehicle according to claim 3, characterized in that the elongated portion convex outer profile (21a, 22a) of each longitudinal edge (21, 22) of the thermal protection screen (12) of the fuel tank (9). ) protrudes from below the plane containing the adjacent side screen (18,19) of this tank.
5. Véhicule selon la revendication 3 ou 4, caractérisé en ce que l'écran de protection thermique (12) du réservoir de carburant (9) comprend une aile de protection thermique (25) solidaire de l'un (22) des bords longitudinaux (21 ,22) de cet écran, s'étendant au- dessus de l'un (19) des écrans latéraux (18,19) du réservoir de carburant (9) et le long d'un côté correspondant de ce réservoir. 5. Vehicle according to claim 3 or 4, characterized in that the thermal protection screen (12) of the fuel tank (9) comprises a thermal protection wing (25) integral with one (22) of the longitudinal edges (21, 22) of this screen, extending above one (19) of the side shields (18, 19) of the fuel tank (9) and along a corresponding side thereof.
6. Véhicule selon l'une des revendications 2 à 5, caractérisé en ce que l'écran de protection thermique (8) du tunnel (2) a son extrémité arrière adjacente à la partie avant (15) et en-dessous de cette partie de l'écran de protection thermique (12) du réservoir de carburant (9). 6. Vehicle according to one of claims 2 to 5, characterized in that the thermal protection screen (8) of the tunnel (2) has its rear end adjacent to the front portion (15) and below this portion the thermal protection screen (12) of the fuel tank (9).
7. Véhicule selon l'une des revendications 1 à 6, caractérisé en ce que l'écran de protection thermique (12) du réservoir de carburant (9) et l'écran de protection thermique (8) du tunnel (2) sont réalisés en aluminium. Vehicle according to one of Claims 1 to 6, characterized in that the thermal protection screen (12) of the fuel tank (9) and the heat shield (8) of the tunnel (2) are produced. in aluminium.
PCT/FR2015/052199 2014-09-08 2015-08-12 Motor vehicle comprising a short exhaust line and a screen for the thermal protection of the fuel tank of the vehicle WO2016038265A1 (en)

Applications Claiming Priority (2)

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FR1458415 2014-09-08
FR1458415A FR3025462B1 (en) 2014-09-08 2014-09-08 MOTOR VEHICLE WITH SHORT EXHAUST LINE AND THERMAL PROTECTION SCREEN OF THE FUEL TANK OF THIS VEHICLE

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5813491A (en) * 1995-03-07 1998-09-29 Nissan Motor Co., Ltd. Under body structure of motor vehicle
JP2004324474A (en) 2003-04-23 2004-11-18 Nissan Motor Co Ltd Thermal insulating plate structure for exhaust pipe system of vehicle
WO2012114007A1 (en) * 2011-02-25 2012-08-30 Peugeot Citroen Automobiles Sa Motor vehicle comprising an exhaust line, the acoustic means of which are arranged in front of the rear axle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5813491A (en) * 1995-03-07 1998-09-29 Nissan Motor Co., Ltd. Under body structure of motor vehicle
JP2004324474A (en) 2003-04-23 2004-11-18 Nissan Motor Co Ltd Thermal insulating plate structure for exhaust pipe system of vehicle
WO2012114007A1 (en) * 2011-02-25 2012-08-30 Peugeot Citroen Automobiles Sa Motor vehicle comprising an exhaust line, the acoustic means of which are arranged in front of the rear axle

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FR3025462B1 (en) 2016-11-18

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