Method for starting an internal combustion engine,...

Details Method for starting an internal combustion engine,... Method for starting an internal combustion engine,...

2005-07-19

2005-07-19

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Starting device

With fuel or intake air control

C123S491000, C123S458000

Reexamination Certificate

active

06918367

ABSTRACT:
During a start, particularly during a cold start, of an internal combustion engine without additional auxiliary drive, a precisely metered fuel mass is introduced into a combustion chamber. In the case of an internal combustion engine having direct fuel injection, a rail pressure prevailing in a high-pressure accumulator is frequently only insufficiently built up during a start, which has an unfavorable effect on the mixture formation. To improve the start performance of the internal combustion engine, the injection pressure available in the high-pressure accumulator is monitored during the start, and fuel from the high-pressure accumulator is first injected into the at least one combustion chamber when the injection pressure has reached or exceeded a specifiable threshold value. This ensures that the rail pressure is high enough, in order to inject a sufficient quantity of fuel into the combustion chamber so that an ignitable air/fuel mixture is formed.

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