发明名称 |
Vehicle evaporative system diagnostic |
摘要 |
A diagnostic method for an evaporative emission control system of an automotive vehicle determines functionality of one of a purge valve and/or a vacuum switch and valve assembly. The vacuum switch and valve assembly is located between a carbon canister and atmosphere and is either open or closed according to whether the system is in a high or low negative pressure condition. A controller determines if the vacuum switch and valve assembly is functioning properly according to the high or low negative pressure condition. The controller determines if the purge valve is functioning properly based on engine performance characteristics.
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申请公布号 |
US7131322(B2) |
申请公布日期 |
2006.11.07 |
申请号 |
US20050101119 |
申请日期 |
2005.04.07 |
申请人 |
DAIMLERCHRYSLER CORPORATION |
发明人 |
BOOMS CHRIS J;SAGER ROGER C;BLOMQUIST WILLIAM B |
分类号 |
G01M15/00;G01M99/00 |
主分类号 |
G01M15/00 |
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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