Method and device for testing a fuel metering system
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0821469
(2004-04-08)
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등록번호 |
US-7380449
(2008-06-03)
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우선권정보 |
DE-103 16 634(2003-04-11) |
발명자
/ 주소 |
- Mrosik,Matthias
- Gangi,Marco
- Schulz,Udo
- Schueller,Michael
- Moser,Eduard
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
5 |
초록
▼
A method and device for testing a fuel metering system. A control unit checks the injector contacts during the initialization phase prior to starting up the fuel metering system. For the test, the injectors are activated by the control unit, and the current values and/or voltage values are evaluated
A method and device for testing a fuel metering system. A control unit checks the injector contacts during the initialization phase prior to starting up the fuel metering system. For the test, the injectors are activated by the control unit, and the current values and/or voltage values are evaluated to detect errors. The control unit controls the fuel metering process during operation.
대표청구항
▼
What is claimed is: 1. A method for testing a fuel metering system of an engine, comprising: checking injector contacts by a single, integrated control unit during an initialization phase prior to starting up the fuel metering system, wherein the integrated control unit is formed as a single, discr
What is claimed is: 1. A method for testing a fuel metering system of an engine, comprising: checking injector contacts by a single, integrated control unit during an initialization phase prior to starting up the fuel metering system, wherein the integrated control unit is formed as a single, discrete structural unit separate from the engine; driving injectors by the single, integrated control unit for testing; evaluating by the single, integrated control unit at least one of (a) current values and (b) voltage values to detect errors; and controlling a fuel metering by the single, integrated control unit during operation, wherein only the single, integrated control unit performs the checking, driving, evaluating, and controlling steps, wherein no other control unit performs the steps of checking, driving, evaluating, and controlling. 2. The method according to claim 1, further comprising carrying out a test once prior to a first startup. 3. The method according to claim 1, further comprising carrying out a test when a speed variable is less than a threshold value. 4. The method according to claim 1, further comprising carrying out a test when a rail pressure variable is less than a threshold value. 5. The method according to claim 1, further comprising carrying out a test when a voltage variable is greater than a threshold value. 6. The method according to claim 1, wherein the detecting of errors includes a check for at least one of a short-circuit, an interruption and a polarity reversal of lines. 7. The method according to claim 1, further comprising, during a test, connecting the control unit to a diagnostic tester via which at least one of (a) the test is started and (b) results of the test are at least one of read-out and displayed. 8. A device for testing a fuel metering system consisting of: a single, integrated control unit for testing injector contacts during an initialization phase prior to starting up the fuel metering system, for controlling injectors for a test, for evaluating at least one of (a) current values and (b) voltage values for error detection purposes, and for controlling a fuel metering during operation, wherein the integrated control unit is formed as a single, discrete structural unit separate from the engine.
이 특허에 인용된 특허 (5)
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Hemmerlein Rodney J. ; West Stephen, Apparatus and method for diagnosing erratic pressure sensor operation in a fuel system of an internal combustion engine.
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Di Leo Luigi,ITX ; Palazzetti Mario,ITX ; Ponti Cesare,ITX, Calibration method for a fuel injection system.
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Weiland, David B., Method and apparatus for diagnosing fuel injectors.
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Seekircher Juergen,DEX ; Bair Martin,DEX, Method and apparatus for testing the electrical connection of solenoid-coil-operated injection valves.
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Pauli Allen J. (Macomb Township MI) Shelly Patrick J. (Framington MI) Leroux Mark D. (Allen Park MI) Melville Thomas R. (Northville MI), On-board fuel delivery diagnostic system for an internal combustion engine.
이 특허를 인용한 특허 (1)
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Hamano, Soji, Liquid discharge device capable of self-diagnosis of discharge functions.
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