发明名称 |
METHOD AND DEVICE FOR DIAGNOSING AN INJECTION VALVE, CONNECTED TO A FUEL RAIL, OF AN INTERNAL COMBUSTION ENGINE |
摘要 |
The invention relates to a method for diagnosing an injection valve (5), wherein in an overrun fuel cut-off phase the fuel supply to the fuel rail (4) is closed, and after the fuel supply has been closed off a first fuel pressure in the fuel rail (4) is measured, and after the first measurement of the fuel pressure an injection valve (5) is actuated for a test injection, after the test injection a second fuel pressure in the fuel rail (4) is measured, a differential pressure value (?P) is formed from the first and second measured fuel pressures and a difference of an operating parameter from a reference parameter is determined from the differential pressure value (?P), and when a previously defined maximum difference is exceeded the injection valve (5) is detected as being defective. The invention also relates to a device for diagnosing an injection valve (5). |
申请公布号 |
WO2009000647(A3) |
申请公布日期 |
2009.02.19 |
申请号 |
WO2008EP57264 |
申请日期 |
2008.06.11 |
申请人 |
CONTINENTAL AUTOMOTIVE GMBH;STAHL, MICHAEL;MIGUEIS, CARLOS EDUARDO;WIESE, MATTHIAS |
发明人 |
STAHL, MICHAEL;MIGUEIS, CARLOS EDUARDO;WIESE, MATTHIAS |
分类号 |
F02D41/22;F02D41/38 |
主分类号 |
F02D41/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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