发明名称 |
Engine control having fuel volatility compensation |
摘要 |
<p>An improved engine control in which the fuel volatility is detected based on a measure of the fired-to-motored cylinder pressure ratio, and used to trim fuel and spark timing controls during engine warm-up and transient fueling periods. In a first embodiment, a matrix of empirically determined pressure ratio values that occur with fuels of differing volatility is stored and compared to the measured pressure ratio to identify the closest stored pressure ratio, and the fuel volatility is determined based on the fuel volatility associated with the identified pressure ratio. In a second embodiment, the actual fuel vapor-to-air equivalence ratio is computed based on the measured pressure ratio, and the fuel volatility is determined based on the deviation between the actual ratio and the desired fuel vapor-to-air equivalence ratio. <IMAGE></p> |
申请公布号 |
EP1091111(A2) |
申请公布日期 |
2001.04.11 |
申请号 |
EP20000118632 |
申请日期 |
2000.08.28 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
KIRWAN, JOHN E.;MATEKUNAS, FREDERIC A.;JORGENSEN, SCOTT W.;CHANG, CHEN-FANG |
分类号 |
F02P5/15;F02D35/02;F02D41/00;F02D41/04;F02D41/06;F02D45/00;(IPC1-7):F02D41/34;F02D41/14 |
主分类号 |
F02P5/15 |
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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