GB2594241A - Method to detect a failure of a high pressure pump located upstream of a combustion engine in a vehicle - Google Patents
Method to detect a failure of a high pressure pump located upstream of a combustion engine in a vehicle Download PDFInfo
- Publication number
- GB2594241A GB2594241A GB2005418.5A GB202005418A GB2594241A GB 2594241 A GB2594241 A GB 2594241A GB 202005418 A GB202005418 A GB 202005418A GB 2594241 A GB2594241 A GB 2594241A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuel
- high pressure
- pressure pump
- pressure
- pump
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000011144 upstream manufacturing Methods 0.000 title claims abstract description 31
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 14
- 239000000446 fuel Substances 0.000 claims abstract description 137
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000011010 flushing procedure Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 101100017019 Schizosaccharomyces pombe (strain 972 / ATCC 24843) him1 gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/042—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/09—Testing internal-combustion engines by monitoring pressure in fluid ducts, e.g. in lubrication or cooling parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A method to detect a failure of a high pressure pump (301, fig 1), wherein the high pressure pump is located upstream of a combustion engine in a vehicle and downstream of a fuel pressure control valve (304) configured to control an amount of fuel streaming through the high pressure pump (301), wherein the method utilizes a dummy actuator (201, fig 3) adapted to replace the fuel pressure control valve (304) at a position upstream of the high pressure pump (301) and configured to enable unobstructed fuel transmission to the high pressure pump (301), and a pressure sensor (303) configured to determine a fuel pressure downstream of the high pressure pump (301), and wherein the method comprises the following steps: - replacing 101 the fuel pressure control valve (304) with the dummy actuator (201); - connecting 102 the pressure sensor (303) to the high pressure pump (301); - flushing (103) the high pressure pump (301) with fuel; - determining 104 a fuel pressure downstream of the high pressure pump (301).
Description
METHOD TO DETECT A FAILURE OF A HIGH PRESSURE PUMP
LOCATED UPSTREAM OF A COMBUSTION ENGINE IN A VEHICLE
S
TECHNICAL FIELD
The present invention relates to a method to detect a failure of a high pressure pump located upstream of a combustion engine in a vehicle.
BACKGROUND OF THE INVENTION
It is known that common rail systems operate at extremely high fuel pressures, wherein any decrease of fuel pressure may cause a progressive reduction in engine power and even a complete engine shut down.
Different types of failures related to a decrease in fuel pressure can occur 15 in a common rail system, caused for example by the high pressure pump, the fuel pressure control valve or the injection system. Thus, it is imperative that such issues are identified and resolved as early as possible in order to prevent damage of the engine. It is therefore important to determine the origin of an engine failure. In order to test the operational capability of the high pressure pump, the fuel pressure control valve upstream of the high pressure pump needs to be fully open for enabling unobstructed fuel transmission.
Prior art methods for testing the operational capability of a high pressure pump consist in driving directly the fuel pressure control valve in order to have the fuel pressure control valve fully opened during the operational capability test.
Such methods require that the fuel pressure control valve is working properly.
Prior art methods are expensive, lengthy, complicated to implement and often require special tools.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to resolve the above-mentioned problem in providing a method to detect a failure of a high pressure pump, wherein the high pressure pump is located upstream of a combustion engine in a vehicle and downstream of a fuel pressure control valve configured to control an amount of fuel streaming through the high pressure pump, wherein the method utilizes a dummy actuator adapted to replace the fuel pressure control valve at a position upstream of the high pressure pump and configured to enable unobstnicted fuel transmission to the high pressure pump, and a pressure sensor configured to determine a fuel pressure downstream of the high pressure pump, and wherein the method comprises the following steps: -replacing the fuel pressure control valve with the dummy actuator; - connecting the pressure sensor to the high pressure pump; - flushing the high pressure pump with fuel; - determining a fuel pressure downstream of the high pressure pump.
Thanks to the claimed method, it is possible to easily diagnose a failure of the high pressure pump at low financial cost. The advantage provided by the claimed method is that it is easy to implement and does not require sophisticated or expensive tools.
The method may comprise a step of determining a state of the high pressure pump derived from the fuel pressure determined by the pressure sensor.
The high pressure pump may be considered to be fully operational if the fuel pressure determined by the pressure sensor exceeds a predetermined value. The method may comprise a step of determining a state of the high pressure pump derived from an amount of fuel received downstream of the pressure sensor.
The high pressure pump may be considered to be fully operational if the amount of fuel received downstream of the pressure sensor exceeds a predetermined value.
Another aspect of the invention comprises a pressure sensing system to detect a failure of a high pressure pump located upstream of a combustion engine in a vehicle and downstream of a fuel pressure control valve configured to control an amount of fuel streaming through the high pressure pump, the pressure sensing system comprising: - a dummy actuator located upstream of a high pressure pump, wherein the dummy actuator is adapted to replace the fuel pressure control valve at a position 30 upstream of the high pressure pump and configured to enable unobstructed fuel transmission to the high pressure pump; - a pressure sensor, wherein the pressure sensor is configured to measure a fuel pressure downstream of the high pressure pump.
The dummy actuator may comprise a clamp, a rod and a sealing ring. The clamp of the dummy actuator may comprise orifices.
The dummy actuator may comprise a metallic support.
The metallic support of the dummy actuator may comprise stainless steel.
The pressure sensor may comprise an electronic display configured to display the fuel pressure of fuel streaming through the pressure sensor.
The pressure sensor may comprise a sealed rail tool.
The pressure sensing system may comprise a fuel container configured to receive fuel.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is now described by way of example with reference to the accompanying drawings in which: Figure 1 shows a common rail injection system comprising a high pressure pump and a fuel pressure control valve.
Figure 2 shows a high pressure pump with a fuel pressure control valve being removed from its intended position upstream of the high pressure pump Figure 3 shows a high pressure pump with a dummy actuator being installed at the position intended for the fuel pressure control valve upstream of the high pressure pump.
Figures 4, 5 and 6 are perspective (Figure 4), top (Figure 5) and side (Figure 6) views of a dummy actuator which is part of a pressure sensing system configured to detect a failure of a high pressure pump located upstream of a combustion engine in a vehicle.
Figure 7 shows a flowchart of a method to detect a failure of a high pressure pump located upstream of a combustion engine in a vehicle.
DECPIPTION OF THE PREFERRED EMBODIMENTS
Figure 1 shows a common rail injection system 401 which constitutes a 30 part of a combustion engine in a vehicle. The common rail system has a modular design. It comprises a high pressure pump 301, fuel injectors 404, and a common rail 403 which is a high pressure reservoir that injects fuel 405 to cylinders via fuel injectors 404. Fuel is supplied from a fuel tank 402 under low pressure to the high pressure pump 301.
The common rail is a metallic cylinder which receives fuel from the high pressure pump 301 via a supplier pipe 406 and distributes it to the fuel injectors 404 under high pressure.
In the configuration shown in Figure 1, four fuel injectors 404 are located downstream of the high pressure pump 301. A fuel pressure control valve 304 located upstream of the high pressure pump 301 allows for controlling the amount of fuel streaming through the high pressure pump 301.
Figure 2 shows a high pressure pump 301 located upstream of a combustion engine in a vehicle. The high pressure pump 301 is configured to feed fuel from a fuel tank under high pressure to a fuel injection system. The amount of fuel streaming through the high pressure pump 301 is controlled by a fuel pressure control valve 304, also referred to as inlet metering valve, located upstream of the high pressure pump 301, meaning that fuel passes through the fuel pressure control valve 304 before passing through the pump.
In the configuration shown in Figure I, the fuel pressure control valve 304 is being removed from its position upstream of the high pressure pump 301.
In one variant, the fuel pressure control valve 304 is a solenoid-actuated spill valve. Depending on a magnetic field created by a solenoid, a coil spring may be contracted or relaxed and control the opening of a check valve, thus controlling fuel transmission.
Figure 3 shows a pressure sensing system 300 connected to a high pressure pump 301 located upstream of a combustion engine in a vehicle and downstream of a position intended for the installation of the fuel pressure control valve. In the configuration shown in Figure 2, the fuel pressure control valve has been removed from its intended position upstream of the high pressure pump 301. This configuration represents a test condition, i, e, when the vehicle is not operational but under inspection, for example in a garage.
The pressure sensing system 300 comprises a pressure sensor 303 and a dummy actuator 201 and is configured to detect a failure of the high pressure pump 301.
In order to prevent the engine from starting when performing a method to detect a failure of the high pressure pump 301, a fuel supply configured to transmit fuel from the high pressure pump 301 to the fuel injectors 404 is interrupted. Instead, the fuel is guided from the high pressure pump 301 to a pressure sensor 303.
The pressure sensor 303 is located downstream of the high pressure pump 301 and is configured to measure a fuel pressure. Therefore, the pressure sensor 303 is connected to a fuel output of the high pressure pump 301. The pressure sensor 303 comprises an electronic display configured to indicate the fuel pressure of fuel streaming through the pressure sensor 303. The pressure determined by the pressure sensor is related to the operational capability of the high pressure pump 301.
In one variant, the pressure sensor 303 comprises a sealed rail tool.
A sealed rail tool comprises a sealed rail and a pressure gauge. A sealed rail is similar to the rail of a common rail system, but with all orifices configured to supply fuel to the fuel injectors sealed. Instead of supplying fuel to the common rail as during normal vehicle operation, the high pressure pump is now connected to the sealed rail. When the vehicle engine is cranking, fuel streams from the high pressure pump through the sealed rail. At one extremity of the sealed rail the fuel pressure may be measured by the pressure gauge.
In the configuration shown in Figure 3, the dummy actuator 201 is being installed upstream of the high pressure pump 301 at the position intended for the installation of the fuel pressure control valve 304.
The dummy actuator 201 is a "false actuator", corresponding to a fuel pressure control valve at a frilly open state. This means that while a fuel pressure control valve 304 is configured to control the transmitted amount of fuel, the dummy actuator 201 is configured to enable unobstructed fuel transmission. This leads to high pressure downstream of the high pressure pump 301 if the high pressure pump is operational In one variant, the dummy actuator is directly attached to the high pressure pump. The dummy actuator therefore comprises a clamp with orifices. The housing of the high pressure pump comprises threaded holes. Screws may be inserted in the orifices of the clamp, which allows for screwing the dummy actuator 201 directly to the high pressure pump 301.
The pressure sensing system further comprises a fuel container configured to receive the fuel downstream of the high pressure pump 301 Figures 4, 5 and 6 show perspective (Figure 4), top (Figure 5) and side (Figure 6) views of the dummy actuator 2W.
The dummy actuator 201 comprises a metallic support, made for example from stainless steel, such as XC48 steel. The support comprises a clamp 202, a rod 203 and a sealing ring. The clamp comprises orifices 205 which allows for inserting screws into the orifices and fixing the dummy actuator to a support such as a high pressure pump 301. The sealing ring is made from natural rubber or any other flexible material. This allows for tight connection of the dummy actuator 201 to a support. The rod facilitates the installation of the dummy actuator on a support since it allows an operator to take and hold the dummy actuator, for example while screwing the dummy actuator to a support such as the high pressure pump 301.
Figure 7 shows a flowchart of a method to detect a failure of a high pressure pump 301 located upstream of a combustion engine in a vehicle and downstream of a fuel pressure control valve 304. The fuel pressure control valve 304 is configured to control an amount of fuel streaming through the high pressure pump 301.
The method utilizes a dummy actuator 201 adapted to replace the fuel pressure control valve 304 at a position upstream of the high pressure pump 301 and configured to enable unobstructed fuel transmission to the high pressure 25 pump.
The method further uses a pressure sensor 303 configured to determine a fuel pressure downstream of the high pressure pump The pressure sensor 303 comprises a display and is configured to indicate the current fuel pressure. The pressure sensor 303 comprises a fuel container configured to receive the fuel streaming through the pressure sensor 303.
The method helps an operator to test the capability of the high pressure pump to generate high fuel pressure.
In a first step 101, the fuel pressure control valve 304 is replaced by a dummy actuator 201 at a position upstream of the high pressure pump 301. The fuel pressure control valve 304 can be removed manually from a position upstream of the high pressure pump 301, which can be easily done for example by 5 an operator working in a garage. A dummy actuator 201 can then be manually fixed at the intended position of the fuel pressure control valve 304. The fuel pressure control valve 304 may be fixed with screws to the high pressure pump. In a second step 102, a pressure sensor 303 is connected to the high pressure pump 301.
In order to prevent the engine from starting when performing the method, a fuel supply configured to transmit fuel from the high pressure pump 301 to the fuel injectors 404 is interrupted. Instead of that, the fuel is guided from the high pressure pump 301 to the pressure sensor 303.
Steps 101 and 102 may be performed in arbitrary order.
In a third step 103, the engine is started and, while the vehicle engine is cranking, the high pressure pump 301 is flushed with fuel. The fuel is streaming with high pressure from the high pressure pump 301 through the pressure sensor 303 in the fuel container.
In a fourth step 104, the fuel pressure is determined downstream of the high pressure pump 301 with the pressure sensor 303. During step 104, the fuel pressure may be measured repeatedly and the pressure value shown on the display of the pressure sensor 303 may be updated repeatedly.
For example, a DFP1 injection pump is considered to be fully operational if the fuel pressure measured downstream of the high pressure pump 301 with a fully open fuel pressure control valve is in a range from 1050 bar to 1375 (+50) bar.
Having performed the above-mentioned method, the fuel pressure sensor 303 and the dummy actuator 201 are removed from the high pressure pump 301 The fuel pressure control valve 304 is again installed at its intended position
S
LIST OF REFERENCES: 101 replacing the fuel pressure control valve 102 connecting a pressure sensor to the high pressure pump 103 flushing the high pressure pump with fuel 104 determining the fuel pressure downstream of the high pressure pump 201 dummy actuator 202 clamp 203 rod 204 sealing ring 205 orifices 300 Pressure sensing system 301 high pressure pump 302 fuel container 303 pressure sensor 304 fuel pressure control valve 401 common rail injection system 402 fuel tank 403 common rail 404 fuel injectors 405 fuel ejected from the fuel injectors 406 supplier pipe
Claims (11)
- CLAIMS: 1. Method to detect a failure of a high pressure pump (301); wherein the high pressure pump is located upstream of a combustion engine in a vehicle and downstream of a fuel pressure control valve (304) configured to control an amount of fuel streaming through the high pressure pump (301), wherein the method utilizes a dummy actuator (201) adapted to replace the fuel pressure control valve (304) at a position upstream of the high pressure pump (301) and configured to enable unobstructed fuel transmission to the high pressure pump (301), and a pressure sensor (303) configured to determine a fuel pressure downstream of the high pressure pump (301), and wherein the method comprises the following steps: - replacing (101) the fuel pressure control valve (304) with the dummy actuator (201); -connecting (102) the pressure sensor (303) to the high pressure pump (301); - flushing (103) the high pressure pump (301) with fuel; - determining (104) a fuel pressure downstream of the high pressure pump (301).
- 2 Method according to claim I. comprising a step of determining a state of the high pressure pump (301) derived from the fuel pressure determined by the pressure sensor (303)
- 3. Method according to claims 2, wherein the high pressure pump (301) is considered to be fully operational if the fuel pressure determined by the pressure sensor (303) exceeds a predetermined value.
- 4 Method according to any of claims 1 to 3, comprising a step of determining a state of the high pressure pump (301) derived from an amount of fuel received downstream of the pressure sensor (303).
- 5. Method according to claim 4, wherein the high pressure pump (301) is considered to be frilly operational if the amount of fuel received downstream of the pressure sensor (303) exceeds a predetermined value.
- 6. Pressure sensing system (300) to detect a failure of a high pressure pump (301) located upstream of a combustion engine in a vehicle and downstream of a fuel pressure control valve (304) configured to control an amount of fuel streaming through the high pressure pump (301), the pressure sensing system (300) comprising: -a dummy actuator (201) located upstream of a high pressure pump (301), wherein the dummy actuator (201) is adapted to replace the fuel pressure control valve (304) at a position upstream of the high pressure pump (301) and configured to enable unobstructed fuel transmission to the high pressure pump (301), -a pressure sensor (303), wherein the pressure sensor is configured to measure a fuel pressure downstream of the high pressure pump (301)
- 7. Pressure sensing system according to claim 6, wherein the dummy actuator (201) comprises a clamp (202), a rod (203) and a sealing ring (204).
- 8. Pressure sensing system according to claim 7, wherein the clamp (202) of the dummy actuator comprises orifices (205).
- 9. Pressure sensing system according to any of claims 6 or 8, wherein the dummy actuator (201) comprises a metallic support.
- 10. Pressure sensing system according to claim 9, wherein the metallic support of the dummy actuator (201) comprises stainless steel.
- 11. Pressure sensing system according to any of claims 6 to 10, wherein the pressure sensor (303) comprises an electronic display configured to display the fuel pressure of fuel streaming through the pressure sensor (303).H. Pressure sensing system according to any of claims 6 or 11, wherein the pressure sensor (303) comprises a sealed rail tool.H. Pressure sensing system according any of claims 6 to 12, wherein the pressure sensing system (303) comprises a fuel container (302) configured to receive fuel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2005418.5A GB2594241B (en) | 2020-04-14 | 2020-04-14 | Method to detect a failure of a high pressure pump located upstream of a combustion engine in a vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2005418.5A GB2594241B (en) | 2020-04-14 | 2020-04-14 | Method to detect a failure of a high pressure pump located upstream of a combustion engine in a vehicle |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB202005418D0 GB202005418D0 (en) | 2020-05-27 |
| GB2594241A true GB2594241A (en) | 2021-10-27 |
| GB2594241B GB2594241B (en) | 2024-04-24 |
Family
ID=70848058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2005418.5A Active GB2594241B (en) | 2020-04-14 | 2020-04-14 | Method to detect a failure of a high pressure pump located upstream of a combustion engine in a vehicle |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2594241B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3817097A (en) * | 1972-06-05 | 1974-06-18 | T Heroux | Method and apparatus for testing hydraulic pumps |
| US5631632A (en) * | 1995-08-31 | 1997-05-20 | Aisin Seiki Kabushiki Kaisha | Pressure monitoring system |
| JP2002221069A (en) * | 2001-01-26 | 2002-08-09 | Hitachi Ltd | Control device for internal combustion engine provided with fuel supply device |
| FR2849117A1 (en) * | 2002-12-23 | 2004-06-25 | Delphi Tech Inc | Vehicles fuel injection system failure diagnosing method, involves comparing measured fluid pressure with predetermined value to diagnose eventual pump failure and actuating discharge valve to allow fluid flow in discharge pipe |
| CN204186571U (en) * | 2014-06-13 | 2015-03-04 | 福州聚升汽车销售服务有限公司 | Motor Vehicle refrigeration pump monitor station |
| RU2648175C1 (en) * | 2017-04-21 | 2018-03-22 | Федеральное государственное бюджетное научное учреждение "Федеральный научный агроинженерный центр ВИМ" (ФГБНУ ФНАЦ ВИМ) | High pressure fuel pump testing device |
-
2020
- 2020-04-14 GB GB2005418.5A patent/GB2594241B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3817097A (en) * | 1972-06-05 | 1974-06-18 | T Heroux | Method and apparatus for testing hydraulic pumps |
| US5631632A (en) * | 1995-08-31 | 1997-05-20 | Aisin Seiki Kabushiki Kaisha | Pressure monitoring system |
| JP2002221069A (en) * | 2001-01-26 | 2002-08-09 | Hitachi Ltd | Control device for internal combustion engine provided with fuel supply device |
| FR2849117A1 (en) * | 2002-12-23 | 2004-06-25 | Delphi Tech Inc | Vehicles fuel injection system failure diagnosing method, involves comparing measured fluid pressure with predetermined value to diagnose eventual pump failure and actuating discharge valve to allow fluid flow in discharge pipe |
| CN204186571U (en) * | 2014-06-13 | 2015-03-04 | 福州聚升汽车销售服务有限公司 | Motor Vehicle refrigeration pump monitor station |
| RU2648175C1 (en) * | 2017-04-21 | 2018-03-22 | Федеральное государственное бюджетное научное учреждение "Федеральный научный агроинженерный центр ВИМ" (ФГБНУ ФНАЦ ВИМ) | High pressure fuel pump testing device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2594241B (en) | 2024-04-24 |
| GB202005418D0 (en) | 2020-05-27 |
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