发明名称 |
Engine starting and warm-up fuel control method having low volatility fuel detection and compensation |
摘要 |
An improved engine fuel control detects combustion instability due to the use of high DI fuel during cold start and warm-up and compensates the fuel control for detected combustion instability through temporary enrichment of the delivered air/fuel ratio. The usage of high DI fuel is detected during an engine idle period following starting by monitoring the engine speed to identify an engine speed excursion more than a calibrated percentage below the desired idle speed. The detection method is enabled under specified environmental conditions, provided the engine run time is greater than a specified time and the engine temperature is within a specified range. Additionally, the method is disabled for a prescribed period following commanded load transitions associated with the air conditioning system and the automatic transmission. When the presence of high DI fuel is detected, and the air/fuel ratio is temporarily enriched to alleviate the instability and to ensure acceptable driveability without unnecessarily increasing hydrocarbon emissions in the engine exhaust gases.
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申请公布号 |
US6637413(B2) |
申请公布日期 |
2003.10.28 |
申请号 |
US20010951883 |
申请日期 |
2001.09.13 |
申请人 |
DELPHI TECHNOLOGIES, INC. |
发明人 |
MALONEY PETER JAMES;YOO IN KWANG;HERMAN ANDREW D.;BREIDENBACH HALLETT D.;YOO DEOG H.;CARLSON CRAIG A. |
分类号 |
F02D31/00;F02D41/00;F02D41/02;F02D41/14;F02D41/16;F02M69/36;(IPC1-7):F02M51/00 |
主分类号 |
F02D31/00 |
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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