发明名称 |
Automotive cold start fuel volatility compensation |
摘要 |
Automotive internal combustion engine fuel volatility is estimated during cold start operations by stabilizing air admission to the engine and analyzing engine speed over a modeling period following an engine coldstart after engine speed has stabilized and prior to closed-loop engine operation. If engine speed deviates significantly away from an expected engine speed for the current engine intake air and fuel, a fuel volatility deviation is diagnosed. The magnitude of the fuel volatility deviation away from a nominal fuel volatility is determined as a function of the magnitude of the engine speed deviation. A fuel volatility correction value is updated as a function of the engine speed deviation and is applied throughout an ignition cycle, including during the modeling period to compensate for the fuel volatility deviation.
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申请公布号 |
US6079396(A) |
申请公布日期 |
2000.06.27 |
申请号 |
US19980069361 |
申请日期 |
1998.04.29 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
AMENT, FRANK;BROWN, DAVID BRIAN |
分类号 |
F02D41/04;F02D41/06;F02D41/14;(IPC1-7):F02D41/00 |
主分类号 |
F02D41/04 |
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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