Control apparatus for an in-cylinder injection internal combusti

Internal-combustion engines – Combustion chamber means having fuel injection only – Combustible mixture stratification means

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123305, F02B 1700, F02B 500

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active

057973679

ABSTRACT:
An engine control unit of a control apparatus for an in-cylinder injection internal combustion engine sets a fuel injection timing for a compression-stroke injection mode in accordance with a fuel injection quantity, and corrects the fuel injection timing according to an engine cooling water temperature. When the cooling water temperature is lower than a temperature observed when a warm-up operation is completed, the fuel injection timing for the compression-stroke injection mode is corrected for advance or retard on the basis of the engine characteristic proper, and fuel is injected at an appropriate time such that the fuel evaporation rate and the fuel stratification degree which permit the stabilized combustion of the fuel injected into the combustion chamber are attained, whereby the fuel is evaporated satisfactorily. Thus, the occurrence of misfire and the emission of harmful gas components can be restrained effectively during the warm-up operation in the compression-stroke injection mode.

REFERENCES:
patent: 4955339 (1990-09-01), Sasaki et al.
patent: 5313920 (1994-05-01), Matsushita
patent: 5722362 (1998-03-01), Takano et al.

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