发明名称 |
Kraftstoffeigenschaft-Erfassungsvorrichtung für Verbrennungsmotoren |
摘要 |
PCT No. PCT/JP95/00307 Sec. 371 Date Oct. 25, 1995 Sec. 102(e) Date Oct. 25, 1995 PCT Filed Feb. 28, 1995 PCT Pub. No. WO95/23285 PCT Pub. Date Aug. 31, 1995Provided is an apparatus for early detecting a volatility of fuel supplied to an engine after engine start, in order to more precisely provide various increasing corrections during air-fuel-ratio control. During increasing-correction (S4) after engine start, a fuel-injection amount delivered to pre-selected one of cylinders is forcibly changed in a stepped manner (S6). Measured (S10) is an elapsed time T from a time (S7) when the injection-amount is changed in a stepped manner to a time (S9) when the integral Pi of a cylinder internal-pressure reflects its variation based on the stepped change in the injection amount. Since a response to a change in an air-fuel ratio is low in case of a heavy-gravity fuel and high in case of a light-gravity fuel, a fuel volatility such as a heavy gravity or a light gravity can be measured (S11) based on a time interval of said elapsed time T. On the basis of detection results, an increasing-correction amount for during cold engine is corrected (S12) to conform to fuel supplied to the engine. |
申请公布号 |
DE19580587(T1) |
申请公布日期 |
1996.08.22 |
申请号 |
DE1995180587T |
申请日期 |
1995.02.28 |
申请人 |
UNISIA JECS CORP., ATSUGI, KANAGAWA, JP |
发明人 |
TOMISAWA, NAOKI, ATSUGI, KANAGAWA, JP;WATANABE, SATORU, ATSUGI, KANAGAWA, JP |
分类号 |
G01M15/04;F02D19/02;F02D19/08;F02D41/00;F02D41/04;F02D41/06;F02D41/14;F02D41/36;F02D45/00;(IPC1-7):F02D45/00 |
主分类号 |
G01M15/04 |
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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