WO2004072467A1

WO2004072467A1 - Integrated air and fuel carrier module

Info

Publication number: WO2004072467A1
Application number: PCT/CA2004/000172
Authority: WO
Inventors: Ki-Ho Lee
Original assignee: Siemens Vdo Automotive Inc.
Priority date: 2003-02-13
Filing date: 2004-02-10
Publication date: 2004-08-26
Also published as: US7191748B2; US20040159308A1; EP1592877A1

Abstract

An air induction manifold (14) has manifold air passages (18). A carrier (26) has air passages (28) to communicate air from the manifold air passages (18) to an engine. The carrier (26) has a first sealing interface (30) for a manifold (14) and a second sealing interface (34) for an engine cylinder. The first sealing interface (30) seals the communication of air between the manifold air passage (18) and the carrier air passage (28). A valve (46) is mounted to the carrier (26) that controls the communication of air through the carrier air passage (28).

Description

INTEGRATED AIR AND FUEL CARRIER MODULE

[0001] This application claims priority to U.S. Provisional Patent Application Serial No. 60/447,051 filed on February 13, 2003.

BACKGROUND OF THE INVENTION

[0002] This invention relates to an air intake manifold assembly for a vehicle, engine.

[0003] An air intake manifold provides air to a vehicle engine. Typically, air is received by an air intake and passed to the air intake manifold where the manifold divides the air through passages into separate streams for each cylinder of the engine. The air intake manifold is mounted to the engine so that each of the separate passages of the manifold provides air to each of the separate combustion chambers of the engine. Fuel injectors are located over each cylinder of the engine as well and serve to distribute fuel for mixture with the incoming air from the manifold. This mixture is then combusted in the cylinder.

[0004] Manufacturers have used valves within the manifold to control the flow of air through each passage. These valves are commonly known as tumble or swirl valves. As known, these valves may be opened and closed to adjust the level of air turbulence within the passage of the manifold. In so doing, these valves may improve the performance of the engine, improve its efficiency and reduce vehicle emissions.

[0005] Due to the location of these valves within the passages of the manifold, these valves may be difficult to adjust and/or service. In addition, their location within the manifold increases the complexity of the manifold as well as the number of its parts. As a consequence, the manifold is costly to produce.

[0006] A need therefore exists for a simplified air intake manifold assembly that has tumble valves.

SUMMARY OF THE INVENTION [0007] The invention comprises an air induction manifold assembly. Like existing manifolds, the inventive manifold supplies air to the combustion chambers of an engine through separate air passages. However, rather than locate the tumble valve in the manifold air passage, the valve is mounted on a support distinct from the manifold, known as a carrier. The carrier is then sandwiched between the manifold and the vehicle engine. In this way, assembly is greatly simplified and the number of parts reduced.

[0008] The carrier has carrier air passage for each manifold air passage. The valve is mounted to the carrier and controls passage of air from the manifold air passage through the carrier air passage to the engine. The carrier has a first sealing surface and, on the other side, a second sealing surface. The first sealing surface seals the interface between the manifold and carrier while the second sealing surface seals the interface between the carrier and the engine.

[0009] The valve may be a flap, which is pivotably mounted to the carrier by a shaft. The shaft may be mounted on one end of a flap or through the middle of the flap. The shaft is further mounted to the carrier by a bearing surface, which permits the shaft to rotate freely relative to the carrier. The bearing surface may be a ball bearing, sleeve or other known bearing surfaces.

[0010] The carrier may also combine other features of the air induction system. The carrier may mount an actuator for controlling the valves. Also, seals may be placed on the surfaces of the carrier. Moreover, the carrier may have supports for fuel injectors of the fuel system of the vehicle to permit their installation with the tumble valves on the engine. Wire may be embedded in the carrier to power the fuel injectors. By combining these elements in this fashion, the time for assembly of both the air intake manifold and fuel packages is greatly reduced. The number of parts is also reduced.

BRIEF DESCRIPTION OF THE DRAWINGS [0011] The various features and advantages of this invention will become apparent to those skilled in the art from the following detailed description of the currently preferred embodiment. The drawings that accompany the detailed description can be briefly described as follows: [0012] Figure 1 illustrates a perspective exploded view of the inventive air intake manifold assembly, showing carrier with valves.

[0013] Figure 2 illustrates a cross-sectional view of the inventive carrier of Figure 1 , highlighting the location of a valve.

[0014] Figure 3 illustrates a bottom view of the carrier of Figures 1 and 2, showing the mounting of the valves to the carrier.

[0015] Figure 4 illustrates a cross 'sectional view of the mounting of a shaft supporting the valves to the carrier.

[0016] Figure 5 illustrates an alternative version of the invention, showing a valve supported through its middle portion.

[0017] Figure 6 illustrates a top view of the version of the invention of Figure 5.

[0018] Figure 7 illustrates a cross-sectional view of the mounting of a shaft supporting the valves of the carrier.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT [0019] Figure 1 illustrates a perspective view of air induction manifold assembly 10. Manifold 14 provides air to engine cylinders 38 of engine head 42. Manifold 14 is formed with manifold air passages 18, one for each engine cylinder 38. In addition, manifold 14 has fuel rail 22 formed as part of the manifold to supply fuel to fuel injectors 86, which provide fuel for mixture with air from manifold air passages 18. This mixture is then combusted in engine cylinders 38.

[0020] In contrast to other designs, air induction manifold assembly 10 has valves 46, here tumble or swirl valves, pivotally mounted to carrier 26. Valves 46 control the flow of air between manifold air passages 18 and engine cylinder 38 like known swirl or tumble valves. However, unlike conventional valves, valves 46 are not mounted within manifold air passages 18 of manifold 14. In this way, construction of manifold 14 is greatly simplified and the number of its parts also reduced.

[0021] Carrier 26 comprises a planar member 29 having carrier air openings 28, one opening for each manifold air passage 18 and engine cylinder 38. Planar member 29 has first sealing interface 30 and second sealing interface 34. First sealing interface 30 receives manifold 14 while second sealing interface 34 receives engine block 42. Carrier 26 is sandwiched between manifold 14 and engine block 42. Carrier 26 has seals 82 on both first sealing interface 30 and second sealing interface 34 to seal the interface between manifold 14 and carrier 26 and to seal the interface between carrier 26 and engine head 42. Seals may be O-ring, lip seal or other commercially available seal.

[0022] In addition, carrier 26 is also formed with fuel injector supports 90 as taught by U.S. Nonprovisional Patent Application Serial No. 10/436,689 filed on May 13, 2003, which is hereby incorporated by reference. Fuel injectors 86 may be inserted into fuel injector supports 90. Moreover, wiring 94 used power fuel injectors 86 may be embedded in carrier 26. Actuator 78 serves to control opening and closing of valves 46 along arrow R. Actuator 78 is preferably mounted to carrier 26 and may be an electric motor or vacuum drive actuator. In this way, a number of differing components may be supported on a single carrier to be installed between manifold 14 and engine block 42.

[0023] As shown in Figure 2, valve 46 is pivotally mounted to carrier 26 to permit its movement along the direction of arrow R. As shown, valve 46 comprises a flap sized to partially cover but not fully cover carrier air opening 28 when completely closed. It is important that valve 46 not completely close so that some air may continue to support ignition within engine cylinder 38. Preferably, seventy to eighty percent of carrier air opening 28 remains open when valve 46 is fully closed.

[0024] Figure 3 illustrates a bottom view of carrier 26. As shown, valves 46 are mounted to carrier 26 at bearing surface 66 through shaft 50. Bearing surface 66 may be a ball bearing, needle bearing, sliding bearing or other commercially available bearing. Shaft 50 is disposed in channel 51 to limit communication of air between openings 28. Lands 53 are raised above channel 51 to seal one opening 28 from another opening 28. Shaft 50 may be plastic or metal. To prevent damage to carrier 26 by shaft 50, metal sleeves 74 provide another bearing surface upon which shaft 50 may turn. In addition, sleeves 74 serve as a seal between openings 28. Sleeves 74 are preferably metal and need not be mounted to carrier 26.

[0025] As shown in Figure 4, at the end of carrier 26 that supports actuator 78, shaft 50 may be supported by a ball bearing 70. Shaft 50 extends through ball bearing 70 for connecting to actuator 78. In addition, it is preferable that bearing seal 98 be employed to prevent the leakage of air from manifold 14 out of this end of carrier 26.

[0026] As seen in Figure 3, valve 46 has first end portion 54, second end portion 58 and middle portion 62 spaced between first end portion 54 and second end portion 58. Shaft 50 is mounted to second end portion 58 of valves 46. Valve 46 may be mounted to shaft 50 in other ways as well.

[0027] Alternatively, Figure 5 shows the mounting of valve 46 through middle portion 62 of valve 46. Mounting valve 46 through middle portion 62 allows for less torque to control the positioning of valve 46 in contrast to mounting shaft 50 to an end portion as shown in Figure 3. Mounting shaft 50 through middle partition 62 is likely to be more durable too. However, mounting shaft 50 to middle portion 62 requires more space and will restrict air flow in the open position. Figure 6 illustrates a bottom view of carrier 26 mounting valve 46 through middle portion 62.

[0028] Figure 7 illustrates another way to mount shaft 50 to carrier 26. As shown, Figure 7 mounts shaft 50 into metal sleeve 74, which itself is mounted into hole 76 of carrier 26. Here, no seal is required because hole 76 has bottom 84 and is not open generally to atmosphere.

[0029] The aforementioned description is exemplary rather that limiting. Many modifications and variations of the present invention are possible in light of the above teachings. The preferred embodiments of this invention have been disclosed. However, one of ordinary skill in the art would recognize that certain modifications would come within the scope of this invention. Hence, within the scope of the appended claims, the invention may be practiced otherwise than as specifically described. For this reason the following claims should be studied to determine the true scope and content of this invention.

Claims

CLAIMS( What is claimed is:

1. An air induction body assembly for a vehicle, comprising: a carrier having a first sealing interface for a manifold and a second sealing interface for an engine cylinder; at least one air opening extending through said carrier, said at least one air opening for communicating air to the engine cylinder; and at least one valve mounted to said carrier, said at least one valve for controlling the communication of air through said at least one opening.

2. The air induction body assembly of Claim 1 wherein said valve comprises a flap.

3. The air induction body assembly of Claim 2 wherein said flap is pivotally mounted to said carrier by a shaft.

4. The air induction body assembly of Claim 3 wherein said flap has a first end portion, a middle portion, and a second end portion, said shaft mounted to said flap at one of said first end portion and said second end portion.

5. The air induction body assembly of Claim 3 wherein said flap has a first end portion, a middle portion, and a second end portion, said shaft mounted to said flap at said middle portion.

6. The air induction body assembly of Claim 3 wherein said shaft is mounted on said carrier by a bearing surface.

7. The air induction body assembly of Claim 6 wherein said bearing surface comprises a ball bearing.

8. The air induction body assembly of Claim 6 wherein said bearing surface comprises a sleeve.

9. The air induction body assembly of Claim 1 including an actuator for controlling said at least one valve, said actuator mounted to said carrier.

10. The air induction body assembly of Claim 1 including at least one seal disposed on one of said first sealing interface and said second sealing interface.

11. The air induction body assembly of Claim 1 wherein said at least one air opening comprises a plurality of air openings and said at least one valve comprises a plurality of valves for controlling air through said plurality of air openings.

12. The air induction body assembly of Claim 1 wherein said carrier has a support for a fuel injector.

13. The air induction body assembly of Claim 12 including a fuel injector supported by said support.

14. The air induction body assembly of Claim 12 including at least one wire embedded in said carrier to power said fuel injector.

15. An air induction manifold assembly for a vehicle, comprising: an air induction manifold having at least one manifold air passage; a carrier having at least one carrier air passage in communication with said at least one manifold air passage, said air passages for communicating air to an engine; said carrier having a first sealing interface for a manifold and a second sealing interface for an engine cylinder, said first sealing interface for sealing the communication of air between said at least one manifold air passage and said at least one carrier air passage; and at least one valve mounted to said carrier, said at least one valve for controlling the communication of air through said at least one opening.

16. The air induction manifold assembly of Claim 15 wherein said valve comprises a flap.

17. The air induction manifold assembly of Claim 16 wherein said flap is pivotally mounted to said carrier by a shaft.

18. The air induction manifold assembly of Claim 15 including an actuator for controlling said at least one valve, said actuator mounted to said carrier.

19. The air induction body assembly of Claim 15 including a fuel injector supported by said carrier.

20. A method of a manufacturing an air induction body, comprising the steps of: providing an air passage through a support; pivotally mounting a flap on the support; placing the air passage in communication with an air intake manifold; and sealing the air passage against the manifold.