Apparatus for detecting and identifying component failure in a fuel system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06F-007/04
F02D-043/00
출원번호
UP-0810410
(2007-06-05)
등록번호
US-7835852
(2011-01-16)
우선권정보
EP-06253124(2006-06-16)
발명자
/ 주소
Williams, Edward
Erdem, Evrin
출원인 / 주소
Delphi Technologies Holding S.arl
대리인 / 주소
Twomey, Thomas N.
인용정보
피인용 횟수 :
2인용 특허 :
5
초록▼
A detector for detecting the operational status of one or more fuel pumps in a fuel system of a vehicle, the system comprising an accumulator volume for storing high pressure fuel, one or more injectors arranged in fluid communication with the accumulator volume and one or more high pressure fuel pu
A detector for detecting the operational status of one or more fuel pumps in a fuel system of a vehicle, the system comprising an accumulator volume for storing high pressure fuel, one or more injectors arranged in fluid communication with the accumulator volume and one or more high pressure fuel pumps arranged in fluid communication with the accumulator volume so as to supply high pressure fuel thereto, the operation of the one or more fuel pumps being controlled by a filling pulse signal from a control means, the detector comprising inputs for receiving data representing at least one current system parameter; processing means arranged to compare the at least one current system parameter against one or more predetermined system parameters in order to identify the operational status of the one or more fuel pumps.
대표청구항▼
The invention claimed is: 1. A detector for detecting the operational status of one or more of a plurality of fuel pumps in a fuel system of a vehicle, the system comprising an accumulator volume for storing high pressure fuel, one or more injectors arranged in fluid communication with the accumula
The invention claimed is: 1. A detector for detecting the operational status of one or more of a plurality of fuel pumps in a fuel system of a vehicle, the system comprising an accumulator volume for storing high pressure fuel, one or more injectors arranged in fluid communication with the accumulator volume and a plurality of high pressure fuel pumps arranged in fluid communication with the accumulator volume so as to supply high pressure fuel thereto, the operation of the fuel pumps being controlled by a filling pulse signal from a control means, the detector comprising inputs for receiving data representing at least one current system parameter processing means arranged to compare the at least one current system parameter against one or more predetermined system parameters in order to identify the operational status of the fuel pumps wherein each fuel pump comprises a pumping chamber within which fuel is pressurised by an associated pumping plunger, the pumping plunger being driven by a cam drive arrangement and the drive motion imparted to the pumping plunger by the cam drive arrangement being a characteristic of the system wherein the processing means compares the at least one current system parameter with the drive motion of the cam drive arrangement, the presence of the drive motion superposed onto the current system parameter indicating a reduction in the operational status of one or more of the fuel pumps, and; wherein the drive motion applied to a first fuel pump is phased in relation to the drive motion being applied to neighbouring fuel pumps wherein the processing means compares the current system parameter with the drive motion as applied to the plurality of fuel pumps in order to determine the operational status of each fuel pump. 2. A detector for detecting the operational status of one or more fuel pumps in a fuel system of a vehicle, the system comprising an accumulator volume for storing high pressure fuel, one or more injectors arranged in fluid communication with the accumulator volume and one or more high pressure fuel pumps arranged in fluid communication with the accumulator volume so as to supply high pressure fuel thereto, the operation of the one or more fuel pumps being controlled by a filling pulse signal from a control means, the detector comprising inputs for receiving data representing at least one current system parameter processing means arranged to compare the at least one current system parameter against one or more predetermined system parameters in order to identify the operational status of the one or more fuel pumps wherein the processing means comprises fast Fourier transform means, the processing means being arranged to transform the at least one current system parameter and the one or more predetermined system parameters and to compare the transformed components wherein the transform components comprise frequency content information and the processing means is arranged to determine if there is a fault in the fuel system by comparing the frequency content information of the current system parameter to the frequency content information of the predetermined system parameter wherein the transform components further comprise phase information and the processing means is arranged to identify the location of the a fault by comparing the phase information of the current system parameters with the phase information of the predetermined system parameter. 3. A detector for detecting the operational status of one or more fuel pumps in a fuel system of a vehicle, the system comprising an accumulator volume for storing high pressure fuel, one or more injectors arranged in fluid communication with the accumulator volume and one or more high pressure fuel pumps arranged in fluid communication with the accumulator volume so as to supply high pressure fuel thereto, the operation of the one or more fuel pumps being controlled by a filling pulse signal from a control means, the detector comprising inputs for receiving data representing at least one current system parameter processing means arranged to compare the at least one current system parameter against one or more predetermined system parameters in order to identify the operational status of the one or more fuel pumps wherein (a) each fuel pump comprises a pumping chamber within which fuel is pressurised by an associated pumping plunger, the pumping plunger being driven by a cam drive arrangement and the drive motion imparted to the pumping plunger by the cam drive arrangement being a characteristic of the system (b) the processing means comprises fast Fourier transform means, the processing means being arranged to transform the at least one current system parameter and the one or more predetermined system parameters and to compare the transformed components (c) the processing means compares transform components of the at least one current system parameter with transform components of the drive motion imparted by the cam drive arrangement to the plunger (d) the processing means is arranged to: (i) measure a current system parameter and obtain a Fourier transform of the measured current system parameter, the Fourier transform comprising frequency content and phase information of the measured current system parameter; (ii) compare the Fourier transform of the measured current system parameter with predetermined Fourier transform information relating to the drive motion of the cam arrangement at each fuel pump, the predetermined Fourier transform information comprising frequency content information of the drive motion of the cam arrangement and phase information corresponding to the frequency content information (iii) determine if a pump has seized in the event that the current system parameter frequency content information matches or substantially matches the predetermined Fourier transform frequency content information and the phase information of the current system parameter frequency content information relative to a fundamental frequency component within the frequency content information matches or substantially matches the phase of the predetermined Fourier transform phase information; (iv) determine which pump has seized by comparing the phase information of a fundamental frequency component within the frequency content information for the predetermined and current transform information. 4. A detector for detecting the operational status of one or more fuel pumps in a fuel system of a vehicle, the system comprising an accumulator volume for storing high pressure fuel, one or more injectors arranged in fluid communication with the accumulator volume and one or more high pressure fuel pumps arranged in fluid communication with the accumulator volume so as to supply high pressure fuel thereto, the operation of the one or more fuel pumps being controlled by a filling pulse signal from a control means, the detector comprising; inputs for receiving data representing at least one current system parameter, and processing means arranged to compare the at least one current system parameter against one or more predetermined system parameters in order to identify the operational status of the one or more fuel pumps. 5. A detector as claimed in claim 4, wherein the one or more predetermined system parameters correspond to data representing one or more faulty fuel system components. 6. A detector as claimed in claim 4, wherein the at least one current system parameter is the pressure within the accumulator volume. 7. A detector as claimed in claim 4, wherein the at least one current system parameter is the filling pulse signal. 8. A detector as claimed in claim 4, wherein the data received by the inputs relates to the pressure within the accumulator volume and the filling pulse signal. 9. A detector as claimed in claim 4, wherein each fuel pump comprises a pumping chamber within which fuel is pressurised by an associated pumping plunger, the pumping plunger being driven by a cam drive arrangement and the drive motion imparted to the pumping plunger by the cam drive arrangement being a characteristic of the system wherein the processing means compares the at least one current system parameter with the drive motion of the cam drive arrangement, the presence of the drive motion superposed onto the current system parameter indicating a reduction in the operational status of one or more of the fuel pumps. 10. A detector as claimed in claim 9, wherein the fuel system comprises a plurality of fuel pumps, each pump being driven by the cam arrangement, the drive motion applied to a first fuel pump being phased in relation to the drive motion being applied to neighbouring fuel pumps wherein the processing means compares the current system parameter with the drive motion as applied to the plurality of fuel pumps in order to determine the operational status of each fuel pump. 11. A detector as claimed in claim 4, wherein the processing means is arranged to analyse the data received by the inputs with respect to time. 12. A detector as claimed in claim 4, wherein the processing means is arranged to analyse the data received by the inputs with respect to engine crank angle. 13. A detector as claimed in claim 4, wherein the processing means comprises pattern recognition means, the processing means being arranged to compare the at least one current system parameter with the one or more predetermined system parameters using the pattern recognition means. 14. A detector as claimed in claim 4, wherein the processing means comprises fast Fourier transform means, the processing means being arranged to transform the at least one current system parameter and the one or more predetermined system parameters and to compare the transformed components. 15. A detector as claimed in claim 14, wherein the transform is with respect to time. 16. A detector as claimed in claim 14, wherein the transform is with respect to engine crank angle. 17. A detector as claimed in claim 14, wherein a) each fuel pump comprises a pumping chamber within which fuel is pressurised by an associated pumping plunger, the pumping plunger being driven by a cam drive arrangement and the drive motion imparted to the pumping plunger by the cam drive arrangement being a characteristic of the system wherein the processing means compares the at least one current system parameter with the drive motion of the cam drive arrangement, the presence of the drive motion superposed onto the current system parameter indicating a reduction in the operational status of one or more of the fuel pumps; b) the processing means compares transform components of the at least one current system parameter with transform components of the drive motion imparted by the cam drive arrangement to the plunger. 18. A detector as claimed in claim 17, wherein the processing means is arranged to: (i) measure a current system parameter and obtain a Fourier transform of the measured current system parameter, the Fourier transform comprising frequency content and phase information of the measured current system parameter; (ii) compare the Fourier transform of the measured current system parameter with predetermined Fourier transform information relating to the drive motion of the cam arrangement at each fuel pump, the predetermined Fourier transform information comprising frequency content information of the drive motion of the cam arrangement and phase information corresponding to the frequency content information (iii) determine if a pump has seized in the event that the current system parameter frequency content information matches or substantially matches the predetermined Fourier transform frequency content information and the phase information of the current system parameter frequency content information relative to a fundamental frequency component within the frequency content information matches or substantially matches the phase of the predetermined Fourier transform phase information; (iv) determine which pump has seized by comparing the phase information of a fundamental frequency component within the frequency content information for the predetermined and current transform information. 19. A detector as claimed in claim 14, wherein the transform components comprise frequency content information and the processing means is arranged to determine if there is a fault in the fuel system by comparing the frequency content information of the current system parameter to the frequency content information of the predetermined system parameter. 20. A detector as claimed in claim 19, wherein the transform components further comprise phase information and the processing means is arranged to identify the location of the a fault by comparing the phase information of the current system parameters with the phase information of the predetermined system parameter. 21. A detector as claimed in claim 4, wherein the one or more predetermined system parameters include one or more of i) a proportional gain value (P), ii) an integral gain value (I) and iii) a derivative gain value (D). 22. A detector as claimed in claim 4, wherein the one or more predetermined system parameters include one or more of i) a steady state gain value (K), ii) a system time constant value (T) and iii) a system time lag value (L). 23. A detector as claimed in claim 4, further comprising storage means for storing predetermined system parameters. 24. A detector as claimed in claim 23, wherein the storage means stores the one or more predetermined parameters for varying engine conditions. 25. A detector as claimed in claim 23, wherein the storage means comprises a look up table for storing the one or more predetermined system parameters. 26. A detector as claimed in claim 4, further comprising output means for outputting a response signal as determined by the processing means. 27. A detector as claimed in claim 26, wherein the response signal comprises a notification signal which is output to indicator means for alerting a user as to the operational status of the fuel pumps. 28. A vehicle comprising an internal combustion engine, an accumulator volume for storing high pressure fuel, one or more injectors arranged in fluid communication with the accumulator volume and one or more high pressure fuel pumps arranged in fluid communication with the accumulator volume so as to supply high pressure fuel thereto, the operation of the one or more fuel pumps being controlled by a filling pulse signal from a control means and a detector as claimed in claim 4. 29. A vehicle as claimed in claim 28, wherein in the event of failure of one or more fuel pumps, the detector outputs a response signal, the response signal comprising an engine control signal to limit the speed of the vehicle. 30. A control unit for controlling a high pressure fuel pump so as to control the volume of fuel that is supplied to an accumulator volume comprising a detector as claimed in claim 4. 31. An engine control unit comprising a detector as claimed in claim 4. 32. A fuel system comprising an accumulator volume for storing high pressure fuel, one or more injectors arranged in fluid communication with the accumulator volume and one or more high pressure fuel pumps arranged in fluid communication with the accumulator volume so as to supply high pressure fuel thereto, the operation of the one or more fuel pumps being controlled by a filling pulse signal from a control means and a detector as claimed in claim 4. 33. A method of detecting the operational status of one or more fuel pumps in a fuel system of a vehicle, the system comprising an accumulator volume for storing high pressure fuel, one or more injectors arranged in fluid communication with the accumulator volume and one or more high pressure fuel pumps arranged in fluid communication with the accumulator volume so as to supply high pressure fuel thereto, the operation of the one or more fuel pumps being controlled by a filling pulse signal from a control means, the method comprising receiving data representing at least one current system parameter comparing the at least one current system parameter against one or more predetermined system parameters in order to identify the operational status of the one or more fuel pumps. 34. A data carrier comprising a computer program arranged to configure a detector to implement the method according to claim 33.
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이 특허에 인용된 특허 (5)
Kohketsu, Susumu; Tanabe, Keiki, Accumulator type fuel injection system.
Stavnheim Jonathan A. ; West Stephen ; Raghunathan Shyamala, Apparatus for diagnosing failures and fault conditions in a fuel system of an internal combustion engine.
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