GB2489687A - Pressure and Temperature Sensor for an Internal Combustion Engine - Google Patents
Pressure and Temperature Sensor for an Internal Combustion Engine Download PDFInfo
- Publication number
- GB2489687A GB2489687A GB201105545A GB201105545A GB2489687A GB 2489687 A GB2489687 A GB 2489687A GB 201105545 A GB201105545 A GB 201105545A GB 201105545 A GB201105545 A GB 201105545A GB 2489687 A GB2489687 A GB 2489687A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuel
- pressure
- sensing element
- temperature
- pressure sensor
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
- G01L23/18—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by resistance strain gauges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0092—Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature
Abstract
A pressure sensor (17, fig.1) for a fuel rail (13, fig.1) of an internal combustion engine comprising a measuring chamber (25, fig.3a) having an inlet opening 22 for receiving a fluid, a pressure sensing element 31 for measuring a parameter indicative of a pressure of the fluid conveyed in the measuring chamber 25 and a temperature sensing element 33 associated with the measuring chamber 25 for measuring a parameter indicative of a temperature of the fluid conveyed in the measuring chamber 25. The sensor 17 may further comprise a membrane 24 associated with both the pressure sensing element 31 and the temperature sensing element 33 wherein the temperature sensing element may be embedded into, located on, deposited in a film layer over the membrane 24. The temperature sensing element 33 may also comprise a negative temperature coefficient thermistor.
Description
PP.ESSDP.IE SENSOR OR AN INIERtThL C4BUSTICfl ENGINE TEfl FIflD The present invention relates to an internal combustion engine equipped with a fuel injection system provided with a pressure sen-sor.
BA(CXD Known internal combustion engines comprise a fuel feeding system for supplying the fuel to the cylinders of the engine.
The fuel feeding system comprises a tank, for the collection of fuel, a low pressure pump, for drawing the fuel from the tank, and an high pressure pump for pressurizing the drawn fuel from the fuel tank and pumping out the pressurized high pressure fuel into the fuel injec-tion system. The fuel injection system comprises a fuel rail and a plurality of electrically controlled fuel injectors to supply metered injections of fuel into the engine. The fuel injection system also comprises a flow back circuit fluidly connecting the fuel injectors to the high pressure purtp for recirculating part of the fuel so that it can be used in a next injection.
The fuel injection system is managed by an electronic control unit (ECU) which regulates the quantity of fuel to be injected depending on the fuel pressure and temperature value. Consequently internal combustion engines are normally equipped with a pressure sensor and a temperature sensor suitable to provide fuel pressure and temperature value to the ECU.
In known internal combustion engines the temperature sensor is lo-cated upstream of the high pressure purp and far away from the fuel injectors. With such a configuration the fuel temperature value meas- ured could be significantly different from the actual fuel tempera-ture value in the proximity of the fuel rail and fuel injectors.
When an incorrect fuel temperature value is used by the ECU for the compensation of the quantity of fuel to be injected, the resulting compensation is inaccurate and a wrong amount of fuel is injected in the engine. This deviation from the correct amount reduces the engine performance and also affects the control strategies of other aux- iliary apparatuses of the internal combustion engine generally caus-ing worse fuel corrbusticns which in turn increases fuel consumption and polluting emissions.
Furthermore damages to the flow back circuit could occur, for example localized fire, if the fuel temperature value is not correctly moni- tored. It becomes essential to be able to monitor with higher accura-cy the fuel temperature value at the level of the active components, i.e. at the level of the fuel injectors, fuel rail and flow back circuit.
In known internal combustion engines, temperature sensors associated with high pressure pumps are used in order to avoid such drawbacks and to allow an accurate fuel temperature measurement. However it is very costly to realize an appropriate high pressure seal for fixing the temperature sensor to the high pressure pump.
Furthermore the installation of two different sensors, a pressure and a temperature sensor, in different places of the injection fuel sys-tem add a further level of complexity to the system making it more costly to realize.
In view of the above, it is an object of an embodiment of the present invention to provide for a pressure sensor that also allows a correct and accurate measurement of the fuel temperature value at the level of the active components. It is also an object of an embodiment of the present invention to provide for an installation of the sensor which is simplified and economic.
Another object of the present invention is to achieve the above men- tioned objects with a simple, rational and rather inexpensive solu-tion.
DISC.OSURE These and/or other objects are achieved by the features of the ernbo- diments of the invention as reported in independent claims. The de- pendent claims recite preferred and/or particularly advantageous fea-tures of the embodiments of the invention.
In greater detail, an aspect of an embodiment of the invention pro-vides a pressure sensor for an internal combustion engine comprising a measuring chamber having an inlet opening for receiving a fluid and a pressure sensing element for measuring a parameter indicative of a pressure of the fluid conveyed in the measuring chamber and a temper-ature sensing element being associated with the measuring chamber for measuring a parameter indicative of the temperature of the fluid con-veyed in the measuring chamber.
In this way a parameter indicative of the temperature of a fluid, for example the temperature value of a fuel in the internal combustion engine temperature, is measured by means of the pressure sensor which is equipped with a temperature sensing element. Furthermore by asso- ciating the temperature sensor to the measuring chamber of the pres- sure sensor the installation process of the two sensors results sim-plified.
According to an aspect of the invention the pressure sensor further comprises a membrane associated with the pressure sensing element and further associated with the temperature sensing element.
In this way both temperature and pressure sensing elements are asso-ciated with the same membrane optimizing the design of the pressure sensor.
According to another aspect of the present invention the temperature sensing element is embedded into the membrane.
Advantageously damages to the temperature sensing element due to pressure exposure can be reduced by integrating the temperature sens-ing element into the membrane during the fabrication process and therefore making it more robust.
According to another aspect of the present invention the temperature sensing element is located on the membrane.
In this way the temperature sensing element can be easily incorpo-rated into the membrane with a simplified production prooess.
According to another aspect of the present invention the temperature sensing element is deposited on the membrane in a film layer.
In this way it is possible to create the temperature sensing element by way of a deposition process.
According to another aspect of the present invention the temperature sensing element comprises a negative temperature coefficient thennis-tor.
Advantageously the use of a negative temperature coefficient thennis-tor consents an accurate measurement of the temperature value in the interested temperature range.
An embodiment of the invention provides a fuel rail in an internal combustion engine comprising a pressure sensor according to any of the characteristics recited above.
An embodiment of the invention provides an internal combustion engine equipped with a fuel rail injection system comprising a pressure sensor according to any of the characteristics recited above.
BRIEF DESCRIPPICtI OF THE DRAWINGS The present invention will now be described, by way of example, with reference to the accompanying drawings.
Figure 1 is a scheme of an internal combustion engine of a motor ve-hicle comprising a fuel feeding system and a fuel injection system.
Figure 2 is a scheme of a pressure sensor according to an embodiment of the present invention.
Figure 3a is a scheme of the pressure sensor of figure 2 wherein the measurement charter is highlighted and its size exaggerated for the purpose of clarity.
Figure 3b is a scheme of the measurement chamber of the pressure sen-sor of figure 3a.
Figure 4 is a scheme of a membrane of a pressure sensor according to an embodiment of the present invention.
DETAILED DESCRIPTICV
In figure 1 an internal combustion engines is indicated with number 1. The engine 1 comprises a fuel feeding system 2 for supplying a fuel from a fuel tank 3 to a fuel injection system 4. The fuel injec-tion system 4 injects the fuel into the cylinders 5 of the engine 1.
The fuel feeding system 2 comprises the tank 3, for collecting the fuel, a low pressure pump 6 connected to the tank 3 via a connecting line 7, for drawing the fuel from the tank 3, and an high pressure pump 8 for pressurizing the drawn fuel from the tank 3 and pumping out the pressurized high pressure fuel into the fuel injection system 4. Between the low pressure pump 6 and the high pressure pump 8 a fuel filter 9 is interposed for filtering the fuel from undesired components. The filter 9 is connected to the low pressure pump 6 via a low pressure fuel line 10, and to the high pressure pump 8 via a connecting line 11. An high pressure fuel line 12 connects the high pressure pump 8 to the fuel injection system 4.
The fuel injection system 4 comprises a fuel rail 13 and a plurality of electrically controlled fuel injectors 14, which are fluidly con-nected with the fuel rail 13 through respective connecting conduits 15 and are repeatedly opened and closed, in order to supply metered injections of fuel into the engine 1.
The fuel injection system 4 also comprises a flow back circuit 16 connecting the fuel injectors 14 to the high pressure pump 8 for re-circulating the fuel from the fuel injectors 14 back to the high pressure pump 8 so that it can be reused in a next injection.
A pressure sensor 17 is located on the fuel rail 13. According to an aspect of an embodiment of the present invention the pressure sensor 17 is suitable to measure a parameter indicative of a pressure, for example the pressure value, of a fluid, for example the fuel in the fuel rail 13 and to measure a parameter indicative of a temperature, for example the temperature value, of a fluid, for example the fuel in the fuel rail 13.
The pressure sensor 17, as shown in figure 2, comprises a main body 18, a hollow cylindrical area 19 within the body 18, and a cylindric-al rod 20 connected to the lower surface of the body 18. The rod 20 is configured to be fixed to the fuel rail 13, for example it is provided with threads so as to be screwed to fuel rail 13. The rod comprises an internal channel 21 running along the axes of symme-try of the rod 20 fluidly connecting the fuel rail 13 to the hollow area 19. The channel 21 comprises a channel entry 23 for receiving the fuel coming from the fuel rail 13 and a channel exit forming an inlet opening 22 of the hollow area 19 for conveying the fuel into the hollow area 19. The channel 21 therefore consents the flow of high pressurized fuel from the fuel rail 13 to the hollow area 19 within the pressure sensor 17.
The hollow area 19 is configured to receive on its upper end a merit-brane 24 which closes the hollow area 19 from above and defines a measuring chamber 25, as illustrated in figure 3a. A top cover 26 is used to cover and seal the measuring chamber 25 from above, as illu-strated in figure 3b. The top cover 26 is provided with integrated positive and negative electrical connectors 27, 28 for supplying pow-er to the pressure sensor 17 and integrated electrical connectors 29,30 for conveying temperature and pressure signals to an electronic control unit (ECU) (not shown) of the internal combustion engine 1.
The ECU is configured to use the pressure and temperature signals produced by the pressure sensor 17 to adjust the quantity of fuel to be injected into the cylinder of the engine 1.
The membrane 24, as shown in figure 4, presents a substantially cir-cular shape configured to engage with the cylindrical shape of the hollow area 19 within the main body 18, and supports a pressure sens-ing element 31. The pressure sensing element 31 comprises a thin film pressure signal detection area 32 placed concentric with the membrane 24 and contact pads (not shown). According to an embodiment of the present invention a temperature sensing element 33 is also associated with the membrane 24.
The temperature sensing element 33 can be errbedded in the pressure signal detection area 32 or in the membrane 24. Alternatively the temperature sensing element 33 can be placed on top of the pressure signal detection area 32 or the membrane 24.
During the normal operation of the internal combustion engine I the low pressure pump 6 extracts the fuel from the fuel tank 3 and flows it through the filter 9. From the filter 9 the high pressure pump 8 draws the fuel and sends it into the fuel rail 13 and into the fuel injectors 14 in a high pressurized format. The ECU controls the oper-ation of the fuel injection system 4, in particular establishes the quantity of fuel to be injected by the fuel injectors 14 into the cy-linders 5 of the engine 1 on the basis of, among other parameters, the fuel pressure value and the fuel temperature value. The ECU, which is connected to the pressure sensor 17, uses the temperature and pressure values measured by the pressure sensor 17 for deciding what strategies to use. Advantageously the fuel temperature value measured by the pressure sensor 17 corresponds to the fuel tempera- ture value in the proximity of the active components i.e. at the 1ev-el of the fuel rail 13, making it a more accurate fuel temperature value to be used by the ECU for selecting an injection strategy.
In more details, during operation the pressurized fuel is conveyed from the fuel rail 13 via the channel entry 23 into the channel 21 and from the channel 21 into the measuring chamber 25 via the inlet opening 22. In the measuring chamber 25 the pressurized fuel enters into contact with the membrane 24 and in particular with the pressure signal detection area 32. The pressure signal detection area 32, which is made of a thin deformable film, is deformed by the pressure force exercised by the pressurized fuel. A pressure signal is then generated by the pressure sensing element 31 depending on the amount of deformation of the detection area 32 and is then sent to the ECU via the pressure electrical connector 30. The ECU, receives the pres-sure signal from the pressure sensor 17 and adjusts the quantity of fuel to be injected accordingly.
Analogously, according to an aspect of an embodiment of the present invention, when the fuel is conveyed into the measuring chamber 25 through the inlet opening 22 it enters in contact with the tempera-ture sensing element 33 and enables it to provide a measurement of temperature value of the fuel conveyed therein. A corresponding tem-perature signal is sent to the ECU via the terrperature electrical connector 29 and is used by the ECU to decide what compensation to apply to the amount of fuel to be injected into the cylinders 5 of the engine 1.
According to a preferred aspect of an ethodiment of the present in- vention the temperature sensing element 33 comprises a resistive sen-sor, in particular a negative temperature coefficient thermistor (NTC) which guarantees a more accurate measurement of the fuel tem-perature value. Normally the measure of a temperature value by means of a resistive sensor is made using a voltage divider consisting in a pull up resistance, having a known resistance value, connected in se-ries to the resistive sensor at a coiunon node. Two different voltage values are supplied respectively to a free end of the voltage divider so as to generate at the corrinon node an analog signal indicative of the resistance of the resistive sensor. The analog signal is then converted to a digital signal by means of an analog to digital (AID) converter, which, in turn, is connected to the engine control unit (ECU). In addition NTC thermistors are characterized by having a non-linear transfer function, in particular they show high resistance at low temperature value which decreased rapidly with the increase of temperature. The very high sensitivity of such sensor results in large output signals and good accuracy and resolution in the inter-ested temperature range, i.e. between -40° and 150°.
The high pressure on the NTC thermistor could cause damages to the thermistor. In order to avoid such problem the NTC thermistor can be embedded into the membrane 24 or the pressure signal detection area 32 during the production process. In particular according to an as-pect of an embodiment of the present invention the NTC thermistor can be embedded into the pressure signal detection area 32. This expe- dient consents to limit the potential damages due to the fuel pres-sure, in fact by integrating the temperature sensing element 33 into the membrane 24, or into the pressure signal detection area 32, it is possible to realize more robust sensors.
According to a different aspect of an embodiment of the present in-vention the temperature sensing element 33 can be deposited on the membrane 24 or on the pressure signal detection area 32 during the production process in a thin layer format.
While at least one exemplary embodiment has been presented in the foregoing sumnary and detailed description, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only exam- ples, and are not intended to limit the scope, applicability, or con- figuration in any way. Rather, the forgoing summary and detailed de-scription will provide those skilled in the art with a convenient road map for implementing at least one exemplary embodiment, it being understood that various changes may be made in the function and ar-rangement of elements described in an exemplary embodiment without departing from the scope as set forth in the appended claims and in their legal equivalents.
REEEMcES 1. Internal combustion engine 2. Fuel feeding system 3. Tank 4. Fuel injection system 5. Engine cylinders 6. Low pressure pump 7. Connecting line 8. High pressure pump 9. Fuel filter 10. Low pressure fuel line 11. Connecting line 12. High pressure fuel line 13. Fuel rail 14. Fuel injectors 15. Connecting conduits 16. Flow back circuit 17. Pressure sensor 18. Pressure sensor main body 19. Pressure sensor hollow area 20. Rod 21. Channel 22. Inlet opening 23. Channel entry 24. Membrane 25. Measuring charrber 26. Top cover 27. Positive power electrical connector 28. Negative power electrical connector 29. Temperature signal electrical connector 30. Pressure signal electrical connector 31. Pressure sensing element 32. Pressure signal detection area 33. Temperature sensing element
Claims (8)
1. A pressure sensor (17) for an internal combustion engine (1) com-prising a measuring chamber (25) having an inlet opening (22) for receiving a fluid, a pressure sensing element (31) for measuring a parameter indicative of a pressure of the fluid conveyed in the measuring chamber (25)and a temperature sensing element (33) as- sociated with the measuring chamber (25) for measuring a parame- ter indicative of a temperature of the fluid conveyed in the mea-suring chamber (25).
2. A pressure sensor (17) according to claim 1 comprising a membrane (24) associated with the pressure sensing element (31) and fur-ther associated with the temperature sensing element (33).
3. A pressure sensor (17) according to claim 2 wherein the tempera-ture sensing element (33) is embedded into the membrane (24).
4. A pressure sensor (17) according to claim 2 wherein the tempera-ture sensing element (33) is located on the membrane (24).
5. A pressure sensor (17) according to claim 4 wherein the tempera-ture sensing element (33) is deposited over the membrane (24)in a film layer.
6. A pressure sensor (17) according to any of the claims from 1 to 5 wherein the temperature sensing element (33) comprises a negative temperature coefficient thermistor.
7. A fuel rail (13) in an internal combustion engine (1) comprising a pressure sensor (17) according to any of the claims from 1 to 6.
8. An internal combustion engine (1) equipped with a fuel rail (13) comprising a pressure sensor (17) according to any of the claims from 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB201105545A GB2489687A (en) | 2011-03-31 | 2011-03-31 | Pressure and Temperature Sensor for an Internal Combustion Engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB201105545A GB2489687A (en) | 2011-03-31 | 2011-03-31 | Pressure and Temperature Sensor for an Internal Combustion Engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201105545D0 GB201105545D0 (en) | 2011-05-18 |
| GB2489687A true GB2489687A (en) | 2012-10-10 |
Family
ID=44071803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB201105545A Withdrawn GB2489687A (en) | 2011-03-31 | 2011-03-31 | Pressure and Temperature Sensor for an Internal Combustion Engine |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2489687A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351607A (en) * | 2019-11-13 | 2020-06-30 | 中国科学院微电子研究所 | Manufacturing method of temperature and pressure composite sensor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5974893A (en) * | 1997-07-24 | 1999-11-02 | Texas Instruments Incorporated | Combined pressure responsive transducer and temperature sensor apparatus |
| DE10206236A1 (en) * | 2002-02-15 | 2003-08-28 | Bosch Gmbh Robert | Fuel injection device for internal combustion engine, has fuel temperature sensor integrated into pressure sensor or fuel metering device |
| US20070121701A1 (en) * | 2005-11-29 | 2007-05-31 | Gennissen Paulus T J | Sensor Arrangement for Measuring a Pressure and a Temperature in a Fluid |
| US20090126498A1 (en) * | 2005-04-18 | 2009-05-21 | Markus Gilch | Pressure sensor device |
| KR20090090752A (en) * | 2008-02-22 | 2009-08-26 | 콘티넨탈 오토모티브 시스템 주식회사 | Apparatus for detecting fuel temperature and fuel pressure and of bi fuel car |
| WO2009153741A1 (en) * | 2008-06-19 | 2009-12-23 | Eltek S.P.A. | Pressure sensor device |
| US20100108035A1 (en) * | 2008-11-06 | 2010-05-06 | Ford Global Technologies, Llc | Addressing fuel pressure uncertainty during startup of a direct injection engine |
-
2011
- 2011-03-31 GB GB201105545A patent/GB2489687A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5974893A (en) * | 1997-07-24 | 1999-11-02 | Texas Instruments Incorporated | Combined pressure responsive transducer and temperature sensor apparatus |
| DE10206236A1 (en) * | 2002-02-15 | 2003-08-28 | Bosch Gmbh Robert | Fuel injection device for internal combustion engine, has fuel temperature sensor integrated into pressure sensor or fuel metering device |
| US20090126498A1 (en) * | 2005-04-18 | 2009-05-21 | Markus Gilch | Pressure sensor device |
| US20070121701A1 (en) * | 2005-11-29 | 2007-05-31 | Gennissen Paulus T J | Sensor Arrangement for Measuring a Pressure and a Temperature in a Fluid |
| KR20090090752A (en) * | 2008-02-22 | 2009-08-26 | 콘티넨탈 오토모티브 시스템 주식회사 | Apparatus for detecting fuel temperature and fuel pressure and of bi fuel car |
| WO2009153741A1 (en) * | 2008-06-19 | 2009-12-23 | Eltek S.P.A. | Pressure sensor device |
| US20100108035A1 (en) * | 2008-11-06 | 2010-05-06 | Ford Global Technologies, Llc | Addressing fuel pressure uncertainty during startup of a direct injection engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351607A (en) * | 2019-11-13 | 2020-06-30 | 中国科学院微电子研究所 | Manufacturing method of temperature and pressure composite sensor |
| CN111351607B (en) * | 2019-11-13 | 2022-01-11 | 中国科学院微电子研究所 | Manufacturing method of temperature and pressure composite sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201105545D0 (en) | 2011-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8695331B2 (en) | Procedure to diagnose a particle filter and device to implement the procedure | |
| US8683853B2 (en) | Apparatus for detecting abnormality for fuel property detecting apparatus | |
| US9127612B2 (en) | Fuel-injection-characteristics learning apparatus | |
| EP2660448B1 (en) | Error detection device for internal combustion engine | |
| US7201048B2 (en) | Measuring device for a flow sensor, in particular an air mass sensor for internal combustion engines and method for measuring air flows | |
| EP3128297B1 (en) | Physical quantity detection device | |
| KR101943773B1 (en) | Fuel consumption-measuring system and method for measuring the fuel consumption of an internal combustion engine | |
| US20130192208A1 (en) | Filter failure detection apparatus of an internal combustion engine | |
| CN105593506A (en) | Fuel filter clogging detection device in fuel supply circuit, and working machine | |
| CN206221124U (en) | It is a kind of to investigate the instrument that common-rail injector high pressure reveals failure | |
| CN103946524B (en) | Common rail system, internal combustion engine, and device and method for controlling and/or regulating an internal combustion engine | |
| KR101478631B1 (en) | Methode for Pre-Insfecting Injector | |
| CN208900262U (en) | A kind of high pressure co-rail system | |
| US9970827B2 (en) | Fuel temperature estimation device | |
| US9052223B2 (en) | Air flow quantity measuring apparatus for internal combustion engine | |
| GB2489687A (en) | Pressure and Temperature Sensor for an Internal Combustion Engine | |
| CN114235073A (en) | Testing device and measuring method for sliding oil consumption | |
| CN203519065U (en) | Intake-air temperature and manifold pressure sensor | |
| JP5240414B2 (en) | Abnormality detection device for internal combustion engine | |
| CN103573356B (en) | Method and apparatus for running exhaust gas probe | |
| CN103850850A (en) | Flow gauge for detecting circular fuel-injection quantity of oil injector of high-pressure common rail system of diesel engine | |
| CN108286475B (en) | Method and system for processing air inflow signal | |
| CN104344857A (en) | Thermal type automobile air flow meter for realizing temperature and humidity compensation by utilizing single-chip microcomputer | |
| CN109519293A (en) | A kind of method and fuel system controlling fuel system distributive value | |
| CN204514409U (en) | Based on the intelligent meter of pressure regulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |