WO2001011230A1 - Improved valve - Google Patents

Improved valve Download PDF

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Publication number
WO2001011230A1
WO2001011230A1 PCT/EP2000/007577 EP0007577W WO0111230A1 WO 2001011230 A1 WO2001011230 A1 WO 2001011230A1 EP 0007577 W EP0007577 W EP 0007577W WO 0111230 A1 WO0111230 A1 WO 0111230A1
Authority
WO
WIPO (PCT)
Prior art keywords
isolation valve
valve
fuel
coupling
pressure sensor
Prior art date
Application number
PCT/EP2000/007577
Other languages
French (fr)
Inventor
John Slight
Original Assignee
Kennar Technics
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 Kennar Technics filed Critical Kennar Technics
Priority to EP00956396A priority Critical patent/EP1203154A1/en
Priority to AU68356/00A priority patent/AU6835600A/en
Publication of WO2001011230A1 publication Critical patent/WO2001011230A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004Joints; Sealings
    • F02M55/005Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004Joints; Sealings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M65/00Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/003Measuring variation of fuel pressure in high pressure line

Definitions

  • the present invention relates to an improved valve, and in particular, though not exclusively, to an isolation valve for use with engines, for example, diesel engines having a total engine power over lOOOkW.
  • engines for example, diesel engines having a total engine power over lOOOkW.
  • Current diesel engines having a total engine power over lOOOkW are referred to as large diesel engines.
  • Large diesel engines operate by injecting fuel at high pressure, for example, above 50MPa, into piston chambers where the fuel is compressed to a combustion point. At this point energy is released in a controlled explosion, driving the piston and thereby providing output power.
  • Most combustion problems in diesel engines originate from the injection timing going out of balance. It is, therefore, advantageous to monitor high fuel pressure in a diesel engine.
  • the fuel pressure is measured via an isolation valve connected to a high pressure fuel pump housing or on a line at a fuel distribution block.
  • the isolation valve uses a needle which opens a line through the isolation valve to a sensing element in the form of a pressure transducer which senses the pressure in the line.
  • the isolation valve is normally closed so as to protect the sensing element which has a limited life.
  • the isolation valve has to fit into a hole (blanked off with a plug) on the fuel pump housing or the fuel distribution block.
  • This hole may have a range of diameters and threads - it is never standard as there are many licensees building large diesel engines.
  • An adapter comprising an adapter pipe is therefore used to join the valve to the hole.
  • This adapter pipe has to be very strong as it takes the pulsing pressure and the isolation valve itself is heavy. Vibration further worsens the load on the adapter pipe.
  • the adapter pipe may be prone to fracture and indeed ultimately potential breakage resulting in fuel spray fire risk.
  • valve and an adapter in a single body.
  • the body may therefore, in use, be directly attached to a socket or aperture in the pump head outlet, in the fuel pump or block.
  • an isolation valve adapted for attachment to a fuel pump or fuel distribution block of an engine, the isolation valve comprising a valve body including valve means and coupling means for coupling the isolation valve to the fuel pump or fuel distribution block of the engine.
  • the engine may be a diesel engine, and may have a total engine power of over lOOOkW.
  • the coupling means may be adapted to couple the isolation valve in the socket of a fuel pump or a line at a fuel distribution block of the engine.
  • valve means may be a needle valve .
  • the isolation valve may have a working pressure above 150MPa.
  • the coupling means may comprise a male portion mateable with the hole.
  • the male portion may carry a threaded portion mateable with an internally threaded portion formed in the hole.
  • the threaded portion may be a B&W or RTA screw thread or the like.
  • the isolation valve further includes at least one and possibly a plurality of further coupling means.
  • the further coupling means comprises a female portion formed in the valve body.
  • the female portion formed in the valve body may include an internally threaded portion.
  • first coupling means and the further coupling means are disposed on an inlet and an outlet of the isolation valve, respectively.
  • the isolation valve may include transducer coupling means.
  • the transducer coupling means may have a male or female portion and preferably is mateable, in use, to a fuel pressure sensor or transducer.
  • the transducer coupling means provides access via a pressure sensor port to the inlet of the isolation valve .
  • the pressure sensing port is disposed at an angle to the inlet.
  • the angle selected preferably results in the needle of the isolation valve mates with the inlet at the shortest possible distance between the inlet and the needle.
  • a minimum amount of valve body continuously endures the high stresses of the high pressure fuel line.
  • the test apparatus comprising an isolation valve and a pressure sensor, the isolation valve comprising a valve body including valve means, coupling means for coupling the isolation valve to a fuel pump or distribution block of the engine, and further coupling means for coupling the isolation valve to the pressure sensor.
  • the engine may be a diesel engine and may have a total engine power of over lOOOkW.
  • the coupling means may be adapted to couple the isolation valve to a socket of a fuel pump or a line at a fuel distribution block of the engine.
  • valve means may be a needle valve.
  • the isolation valve may have a working pressure above 150MPa.
  • the coupling means may comprise a male portion mateable with the socket.
  • the male portion may carry a threaded portion mateable with an internally threaded portion formed in the socket .
  • the threaded portion may be a B&W or RTA screw thread or the like.
  • the isolation valve further includes further coupling means .
  • the further coupling means comprises a female portion formed in the valve body.
  • the female portion formed in the valve body may include an internally threaded portion.
  • first coupling means and the further coupling means are disposed on the inlet and an outlet of the isolation valve, respectively.
  • the isolation valve may include transducer coupling means.
  • the transducer coupling means may have a male or female portion and preferably is mateable, in use, to a fuel pressure sensor or transducer.
  • the transducer coupling means provides access via a pressure sensor port to the inlet of the isolation valve.
  • the pressure sensing port is disposed at an angle to the inlet.
  • the angle selected preferably results in the needle of the isolation valve mating with the inlet at the shortest possible distance between the inlet and the needle.
  • a minimum amount of valve body continuously endures the high stresses of the high pressure fuel line.
  • the coupling means is enclosed in the body of the fuel pump or distribution block. This arrangement provides strengthening to the coupling means from the surrounding casing.
  • test apparatus may include a quick release coupling.
  • the quick release coupling may be the transducer coupling means.
  • the quick release coupling includes a nipple .
  • the nipple includes a check valve.
  • the nipple is attached to the isolation valve and the coupling is attached to the inlet of the pressure sensor.
  • a method of measuring fuel pressure in an engine by providing an isolation valve comprising a valve body including valve means and coupling means for coupling an inlet of the isolation valve to a fuel pump or distribution block of the engine, and a pressure sensor, said method comprising the steps of: a) attaching the coupling means to the fuel pump or distribution block; b) communicating an inlet of the pressure sensor with the inlet of the isolation valve, at an angle with respect to each other; c) opening the isolation valve, and d) measuring the fuel pressure via the pressure sensor.
  • the method includes, between steps a) and b) , the step of inserting a quick release coupling between the inlet of the isolation valve and the inlet of the pressure sensor to allow the pressure sensor and a coupling of the quick release coupling to be releasably disengaged from the isolation valve.
  • Fig. 1 is a schematic diagram of a perspective view of an isolation valve in accordance with a first embodiment of the present invention
  • Fig. 2 is a series of views of the valve of Fig. 1;
  • Fig. 3 is a series of views of an isolation valve in accordance with a preferred embodiment of the present invention.
  • Fig. 4 is a schematic diagram of apparatus including an isolation valve according to Fig. 2 in accordance with an embodiment of the present invention.
  • the first embodiment comprises an isolation valve 10 having a through port 26 for passage of fuel at high pressure from inlet 18 to outlet 30. Each end of the through port 26 is terminated with a connector 14,24. Screw threaded female connector 14 is for connection to the outlet of a fuel pump. Screw threaded male connector 24 is for connection to the high pressure fuel line.
  • needle valve port 20 Incident with the through port 26 at a needle tip sealing point 28 is needle valve port 20. Needle valve port 20 is mounted parallel and perpendicular to the main faces of the valve body 12.
  • Fig. 2(a) is a cross-sectional view of the valve 10 of Fig. 1, in fine detail.
  • Fig. 2(b) is a plan view of Fig. 2(a) with hidden detail of the features of the valve 10.
  • a cross-sectional view through the valve 10 of Fig. 1 is shown at Fig. 2(c) together with the corresponding plan view with hidden detail in Fig. 2(d) .
  • the offset pressure sensor port 22 is now visible in relation to needle valve port 20. In this arrangement the offset pressure sensor port 22 meets the needle valve port 20 to the right of the needle tip sealing point 28 in the through port 26.
  • Isolation valve 10a has three ports 30a, 20a and 22a. Large diameter screw threaded male connector 30a is mounted clear of valve body 12a. Connector 30a is fitted into the body of the fuel pump or distribution block so that face 38 of the isolation valve 10a is close to the opposite face of the fuel pump or distribution block. The large diameter provides greater resistance to vibrations from the fuel pump line/ distribution block to which it is attached.
  • connector 30a is mounted into the fuel pump or distribution block to minimise the amount of valve body continuously enduring the high stresses of the high pressure fuel line. Over 80% of the port at connector 30a is enclosed in the body of the fuel pump or distribution block, thereby gaining the strength of the surrounding casing.
  • the offset pressure sensor port 22a is located on the valve body 12b and meets the needle port 20a close to the needle tip sealing point 28a.
  • a quick release coupling is attached to the port 22a which, in turn, is connected to a fuel pressure sensor.
  • the offset angle of port 22a provides ease of access to connect and disconnect the fuel pressure sensor and allows the needle to meet its mating surface nearer the inlet port 18a, as described hereinafter.
  • Needle valve port 20a directly faces the input in the line of through port 26a. However, the position of the needle tip sealing point 28a is arranged to be as close to the inlet port 18a as possible. This arrangement ensures that the valve body 12a is subjected to the minimum stresses from pressure in the line of the through port 26a. Isolation valve 10a is designed to provide a small valve body 12a with a large connector 18 to be mounted in the fuel pump or distribution block or fuel line of an engine .
  • FIG. 4 of the drawings depicts a test apparatus, generally indicated by reference numeral 40, for fuel pressure measurement in, for example, a diesel engine having a total engine power over lOOOkW according to an embodiment of the present invention.
  • the apparatus 40 is connected to a hole 42 of a fuel pump or a fuel line at a fuel distribution block, generally designated 44.
  • An isolation valve 10b as described hereinbefore with like parts given the same numeral but now suffixed "b", is directly coupled to the hole 42 by mating to the screw threaded connector 18b which is part of the valve body 12b.
  • a second screw threaded connector 22b of female type is located on an outlet of the isolation valve 10b.
  • a quick release coupling is located between the isolation valve 10b and a pressure sensor 50.
  • the quick release coupling 48 comprises a nipple 52 and coupling 54.
  • Nipple end 56 is screwed into the screw threaded connector 22b on the outlet of the isolation valve 10b.
  • the releasable engagement of a quick release coupling 48 is operated by inserting an engaging portion 60 of the nipple 52 into a receiving aperture 62 of the coupling 54. Disengagement is achieved by twisting a knurled sleeve 64 on the coupling 54.
  • the quick release coupling 48 is a commercially available component as will be appreciated by persons skilled in the art .
  • the use of the quick release coupling enables very rapid engaging and disengaging of the pressure sensor.
  • the pressure sensor 50 connected to the coupling 54 is Model No. 6729 available from Kistler (trademark) .
  • a principal advantage of one or more embodiments of the present invention is provision of an adapter and valve combined as a single unit, obviating the need for adapters and providing a strong connection point between valve and fuel pump/line which reduces maintenance repair and likelihood of failure with the associated risk of fire due to spraying high-pressure fuel oil.

Abstract

An isolation valve (10b) for attachment to a fuel pump or fuel distribution block (44) of an engine is described. The valve (10b) comprises a valve and adaptor in a single body for direct attachment to a socket in the fuel pump or distribution block. A pressure sensor (50) can further be attached to the valve to provide fuel pressure measurement apparatus. In particular, the isolation valve can be used with large diesel engines e.g. 1000 kW engine power which operate with fuel pressures above 50 Mpa.

Description

IMPROVED VALVE
The present invention relates to an improved valve, and in particular, though not exclusively, to an isolation valve for use with engines, for example, diesel engines having a total engine power over lOOOkW. Current diesel engines having a total engine power over lOOOkW are referred to as large diesel engines. Large diesel engines operate by injecting fuel at high pressure, for example, above 50MPa, into piston chambers where the fuel is compressed to a combustion point. At this point energy is released in a controlled explosion, driving the piston and thereby providing output power. Most combustion problems in diesel engines originate from the injection timing going out of balance. It is, therefore, advantageous to monitor high fuel pressure in a diesel engine.
Traditionally the fuel pressure is measured via an isolation valve connected to a high pressure fuel pump housing or on a line at a fuel distribution block. The isolation valve uses a needle which opens a line through the isolation valve to a sensing element in the form of a pressure transducer which senses the pressure in the line. The isolation valve is normally closed so as to protect the sensing element which has a limited life.
The isolation valve has to fit into a hole (blanked off with a plug) on the fuel pump housing or the fuel distribution block. This hole may have a range of diameters and threads - it is never standard as there are many licensees building large diesel engines. An adapter comprising an adapter pipe is therefore used to join the valve to the hole. However, there needs to be a specific adapter pipe to fit each hole type. This adapter pipe has to be very strong as it takes the pulsing pressure and the isolation valve itself is heavy. Vibration further worsens the load on the adapter pipe. The adapter pipe may be prone to fracture and indeed ultimately potential breakage resulting in fuel spray fire risk.
It is an object of at least one aspect of the present invention to obviate or mitigate one or more of the aforementioned disadvantages in the prior art.
This object is addressed by the general solution of providing a valve and an adapter in a single body. The body may therefore, in use, be directly attached to a socket or aperture in the pump head outlet, in the fuel pump or block.
According to a first aspect of the present invention there is provided an isolation valve adapted for attachment to a fuel pump or fuel distribution block of an engine, the isolation valve comprising a valve body including valve means and coupling means for coupling the isolation valve to the fuel pump or fuel distribution block of the engine.
The engine may be a diesel engine, and may have a total engine power of over lOOOkW. The coupling means may be adapted to couple the isolation valve in the socket of a fuel pump or a line at a fuel distribution block of the engine.
Preferably the valve means may be a needle valve .
Preferably also the isolation valve may have a working pressure above 150MPa.
Advantageously the coupling means may comprise a male portion mateable with the hole.
The male portion may carry a threaded portion mateable with an internally threaded portion formed in the hole.
Preferably the threaded portion may be a B&W or RTA screw thread or the like.
Preferably the isolation valve further includes at least one and possibly a plurality of further coupling means.
Preferably the further coupling means comprises a female portion formed in the valve body. The female portion formed in the valve body may include an internally threaded portion.
Preferably the first coupling means and the further coupling means are disposed on an inlet and an outlet of the isolation valve, respectively.
Additionally, the isolation valve may include transducer coupling means. The transducer coupling means may have a male or female portion and preferably is mateable, in use, to a fuel pressure sensor or transducer.
Preferably, the transducer coupling means provides access via a pressure sensor port to the inlet of the isolation valve .
Preferably, the pressure sensing port is disposed at an angle to the inlet. The angle selected preferably results in the needle of the isolation valve mates with the inlet at the shortest possible distance between the inlet and the needle. In the preferred embodiment, a minimum amount of valve body continuously endures the high stresses of the high pressure fuel line.
Preferably also, in use, over 80% of the coupling means is enclosed in the body of the fuel pump or distribution block. This arrangement provides strengthening to the coupling means from the surrounding casing. According to a second aspect of the present invention, there is provided apparatus for fuel pressure measurement in an engine, the test apparatus comprising an isolation valve and a pressure sensor, the isolation valve comprising a valve body including valve means, coupling means for coupling the isolation valve to a fuel pump or distribution block of the engine, and further coupling means for coupling the isolation valve to the pressure sensor.
The engine may be a diesel engine and may have a total engine power of over lOOOkW.
The coupling means may be adapted to couple the isolation valve to a socket of a fuel pump or a line at a fuel distribution block of the engine.
Preferably the valve means may be a needle valve.
Preferably also the isolation valve may have a working pressure above 150MPa. Advantageously the coupling means may comprise a male portion mateable with the socket.
The male portion may carry a threaded portion mateable with an internally threaded portion formed in the socket . Preferably the threaded portion may be a B&W or RTA screw thread or the like.
Preferably the isolation valve further includes further coupling means .
Preferably the further coupling means comprises a female portion formed in the valve body. The female portion formed in the valve body may include an internally threaded portion.
Preferably the first coupling means and the further coupling means are disposed on the inlet and an outlet of the isolation valve, respectively.
Additionally, the isolation valve may include transducer coupling means. The transducer coupling means may have a male or female portion and preferably is mateable, in use, to a fuel pressure sensor or transducer.
Preferably, the transducer coupling means provides access via a pressure sensor port to the inlet of the isolation valve.
Preferably, the pressure sensing port is disposed at an angle to the inlet. The angle selected preferably results in the needle of the isolation valve mating with the inlet at the shortest possible distance between the inlet and the needle. In the preferred embodiment, a minimum amount of valve body continuously endures the high stresses of the high pressure fuel line.
Preferably also, in use, over 80% of the coupling means is enclosed in the body of the fuel pump or distribution block. This arrangement provides strengthening to the coupling means from the surrounding casing.
Advantageously the test apparatus may include a quick release coupling. The quick release coupling may be the transducer coupling means.
Preferably, the quick release coupling includes a nipple .
Preferably the nipple includes a check valve. Preferably also, the nipple is attached to the isolation valve and the coupling is attached to the inlet of the pressure sensor.
According to a third aspect of the present invention there is provided a method of measuring fuel pressure in an engine by providing an isolation valve comprising a valve body including valve means and coupling means for coupling an inlet of the isolation valve to a fuel pump or distribution block of the engine, and a pressure sensor, said method comprising the steps of: a) attaching the coupling means to the fuel pump or distribution block; b) communicating an inlet of the pressure sensor with the inlet of the isolation valve, at an angle with respect to each other; c) opening the isolation valve, and d) measuring the fuel pressure via the pressure sensor. Preferably the method includes, between steps a) and b) , the step of inserting a quick release coupling between the inlet of the isolation valve and the inlet of the pressure sensor to allow the pressure sensor and a coupling of the quick release coupling to be releasably disengaged from the isolation valve.
These and other aspects of the present invention will become apparent from the following description when taken in combination with the accompany drawings in which :
Fig. 1 is a schematic diagram of a perspective view of an isolation valve in accordance with a first embodiment of the present invention;
Fig. 2 is a series of views of the valve of Fig. 1; Fig. 3 is a series of views of an isolation valve in accordance with a preferred embodiment of the present invention, and
Fig. 4 is a schematic diagram of apparatus including an isolation valve according to Fig. 2 in accordance with an embodiment of the present invention. Reference is first made to Fig. 1 of the drawings which depicts a perspective view, with hidden detail, of a first embodiment of the present invention. The first embodiment comprises an isolation valve 10 having a through port 26 for passage of fuel at high pressure from inlet 18 to outlet 30. Each end of the through port 26 is terminated with a connector 14,24. Screw threaded female connector 14 is for connection to the outlet of a fuel pump. Screw threaded male connector 24 is for connection to the high pressure fuel line. Incident with the through port 26 at a needle tip sealing point 28 is needle valve port 20. Needle valve port 20 is mounted parallel and perpendicular to the main faces of the valve body 12. However, the position of the needle (not shown) or its operating handle (not shown) relative to the through port 26 is irrelevant. Offset from the needle valve port 20 is an offset pressure sensor port 22. Port 22 is for connection to a fuel pressure sensor and is angled to allow freer finger movement around a quick release coupling when a quick release coupling is used to mate the fuel pressure sensor to the isolation valve 10. In use, the needle is pulled free from the through port 26 and the offset pressure sensor port 22, allowing high pressure fuel to reach the fuel pressure sensor for measurement . A clear view of the components of the isolation valve 10 of the first embodiment can be seen in the technical drawings used for the construction of the valve 10. Fig. 2(a) is a cross-sectional view of the valve 10 of Fig. 1, in fine detail. Male and female screw threaded connectors, 24 and 14 respectively, are located at either end of through port 26 and needle valve port 20 is mounted perpendicular to through port 26, impinging at needle tip sealing point 28. Fig. 2(b) is a plan view of Fig. 2(a) with hidden detail of the features of the valve 10. A cross-sectional view through the valve 10 of Fig. 1 is shown at Fig. 2(c) together with the corresponding plan view with hidden detail in Fig. 2(d) . In Fig. 2c, the offset pressure sensor port 22 is now visible in relation to needle valve port 20. In this arrangement the offset pressure sensor port 22 meets the needle valve port 20 to the right of the needle tip sealing point 28 in the through port 26.
A preferred embodiment is shown in Fig. 3 of the drawings. This figure illustrates (a) front, (b) side, (c) plan views and (d) cross-sectional view through section A-A of Fig. 3(b) respectively. Like parts to the earlier figures are given the same reference numeral but are suffixed "a". Isolation valve 10a has three ports 30a, 20a and 22a. Large diameter screw threaded male connector 30a is mounted clear of valve body 12a. Connector 30a is fitted into the body of the fuel pump or distribution block so that face 38 of the isolation valve 10a is close to the opposite face of the fuel pump or distribution block. The large diameter provides greater resistance to vibrations from the fuel pump line/ distribution block to which it is attached. In addition, connector 30a is mounted into the fuel pump or distribution block to minimise the amount of valve body continuously enduring the high stresses of the high pressure fuel line. Over 80% of the port at connector 30a is enclosed in the body of the fuel pump or distribution block, thereby gaining the strength of the surrounding casing. The offset pressure sensor port 22a is located on the valve body 12b and meets the needle port 20a close to the needle tip sealing point 28a.
A quick release coupling is attached to the port 22a which, in turn, is connected to a fuel pressure sensor. The offset angle of port 22a provides ease of access to connect and disconnect the fuel pressure sensor and allows the needle to meet its mating surface nearer the inlet port 18a, as described hereinafter.
Needle valve port 20a directly faces the input in the line of through port 26a. However, the position of the needle tip sealing point 28a is arranged to be as close to the inlet port 18a as possible. This arrangement ensures that the valve body 12a is subjected to the minimum stresses from pressure in the line of the through port 26a. Isolation valve 10a is designed to provide a small valve body 12a with a large connector 18 to be mounted in the fuel pump or distribution block or fuel line of an engine .
Reference is now made to Fig. 4 of the drawings which depicts a test apparatus, generally indicated by reference numeral 40, for fuel pressure measurement in, for example, a diesel engine having a total engine power over lOOOkW according to an embodiment of the present invention. The apparatus 40 is connected to a hole 42 of a fuel pump or a fuel line at a fuel distribution block, generally designated 44. An isolation valve 10b, as described hereinbefore with like parts given the same numeral but now suffixed "b", is directly coupled to the hole 42 by mating to the screw threaded connector 18b which is part of the valve body 12b. A second screw threaded connector 22b of female type is located on an outlet of the isolation valve 10b.
A quick release coupling, generally indicated by reference numeral 48, is located between the isolation valve 10b and a pressure sensor 50. The quick release coupling 48 comprises a nipple 52 and coupling 54. Nipple end 56 is screwed into the screw threaded connector 22b on the outlet of the isolation valve 10b. The releasable engagement of a quick release coupling 48 is operated by inserting an engaging portion 60 of the nipple 52 into a receiving aperture 62 of the coupling 54. Disengagement is achieved by twisting a knurled sleeve 64 on the coupling 54.
The quick release coupling 48 is a commercially available component as will be appreciated by persons skilled in the art . The use of the quick release coupling enables very rapid engaging and disengaging of the pressure sensor. The pressure sensor 50 connected to the coupling 54 is Model No. 6729 available from Kistler (trademark) .
It will be appreciated that a principal advantage of one or more embodiments of the present invention is provision of an adapter and valve combined as a single unit, obviating the need for adapters and providing a strong connection point between valve and fuel pump/line which reduces maintenance repair and likelihood of failure with the associated risk of fire due to spraying high-pressure fuel oil.

Claims

1. An isolation valve adapted for attachment to a fuel pump or fuel distribution block or fuel line of an engine, the isolation valve comprising a valve body including valve means and coupling means for coupling the isolation valve to the fuel pump, distribution block or fuel line of the engine.
2. An isolation valve as claimed in claim 1 wherein the valve means is a needle valve.
3. An isolation valve as claimed in claim 1 or 2 wherein the coupling means is a threaded coupling.
4. An isolation valve as claimed in any preceding claim wherein the isolation valve includes transducer coupling means .
5. An isolation valve as claimed in claim 4 wherein the transducer coupling means provides access via a pressure sensor port to the inlet of the isolation valve.
6. An isolation valve as claimed in claim 5 wherein the pressure sensing port is disposed at an angle to the inlet .
7. Apparatus for fuel pressure measurement in an engine, the apparatus comprising an isolation valve and a pressure sensor, the isolation valve comprising a valve body including valve means, coupling means for coupling the isolation valve to a fuel pump or distribution block or fuel line of the engine, and further coupling means for coupling the isolation valve to the pressure sensor.
8. Apparatus as claimed in claim 7 wherein the apparatus includes a quick release coupling.
9. Apparatus as claimed in claim 8 wherein the quick release coupling is a transducer coupling means.
10. A method of measure fuel pressure in an engine by providing an isolation valve comprising a valve body including valve means and coupling means for coupling an inlet of the isolation valve to a fuel pump or distribution block or fuel line of the engine, and a pressure sensor, said method comprising the steps of: a) attaching the coupling means to the fuel pump or distribution block or fuel line; b) communicating an inlet of the pressure sensor with the inlet of the isolation valve, at an angle with respect to each other; c) opening the isolation valve, and d) measuring the fuel pressure via the pressure sensor .
11. A method as claimed in claim 10 wherein the method includes, between steps a) and b) , the step of inserting a quick release coupling between the pressure inlet of the isolation valve and the inlet of the pressure sensor.
PCT/EP2000/007577 1999-08-06 2000-08-01 Improved valve WO2001011230A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP00956396A EP1203154A1 (en) 1999-08-06 2000-08-01 Improved valve
AU68356/00A AU6835600A (en) 1999-08-06 2000-08-01 Improved valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9918459.0A GB9918459D0 (en) 1999-08-06 1999-08-06 Improved valve
GB9918459.0 1999-08-06

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WO2001011230A1 true WO2001011230A1 (en) 2001-02-15

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EP (1) EP1203154A1 (en)
AU (1) AU6835600A (en)
GB (1) GB9918459D0 (en)
WO (1) WO2001011230A1 (en)

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Publication number Priority date Publication date Assignee Title
US10030619B2 (en) 2016-07-07 2018-07-24 Caterpillar Inc. Connector for mounting sensor in pressurized fluid system

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DE2143476A1 (en) * 1970-10-07 1972-04-13 List, Hans, Prof. Dipl.-Ing. Dr. Dr.h.c, Graz (Österreich) Device for measuring the pressure in injection lines
US4598581A (en) * 1984-06-25 1986-07-08 Fmc Corporation Quick connect diagnostic system
GB2243432A (en) * 1990-04-26 1991-10-30 Ford Motor Co A fuel line arrangement
GB2333323A (en) * 1998-01-15 1999-07-21 Ford Motor Co Fuel line press-fit pressure diagnostic port

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Publication number Priority date Publication date Assignee Title
FR1017779A (en) * 1950-02-22 1952-12-18 Device for calibrating, checking and adjusting the injection equipment of a diesel engine
DE2143476A1 (en) * 1970-10-07 1972-04-13 List, Hans, Prof. Dipl.-Ing. Dr. Dr.h.c, Graz (Österreich) Device for measuring the pressure in injection lines
US4598581A (en) * 1984-06-25 1986-07-08 Fmc Corporation Quick connect diagnostic system
GB2243432A (en) * 1990-04-26 1991-10-30 Ford Motor Co A fuel line arrangement
GB2333323A (en) * 1998-01-15 1999-07-21 Ford Motor Co Fuel line press-fit pressure diagnostic port

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GB9918459D0 (en) 1999-10-06
AU6835600A (en) 2001-03-05
EP1203154A1 (en) 2002-05-08

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