Controller of in-cylinder injection engine

Details Controller of in-cylinder injection engine Controller of in-cylinder injection engine

2008-01-15

2008-01-15

Argenbright, T. M (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S478000

Reexamination Certificate

active

07318415

ABSTRACT:
If a high-pressure pump discharges fuel in an injection waiting period from injection setting to injection start, fuel pressure to occur at injection start time is estimated and a fuel pressure correction coefficient is calculated based on the estimated fuel pressure. If there is no fuel discharge in the injection waiting period, the fuel pressure sensed at the injection setting is regarded as the fuel pressure of the injection start time, and the fuel pressure correction coefficient is calculated based on the sensed fuel pressure. A final injection period is calculated by correcting a basic injection period with the fuel pressure correction coefficient. Thus, fuel pressure correction of the injection period is performed accurately even if actual fuel pressure fluctuates due to the fuel discharge from the high-pressure pump during the injection waiting period.

REFERENCES:
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patent: 6298830 (2001-10-01), Kono
patent: 6354274 (2002-03-01), Shima et al.
patent: 6718946 (2004-04-01), Hokazono et al.
patent: 09-195819 (1997-07-01), None
patent: 2000-320385 (2000-11-01), None
patent: 2001-336436 (2001-12-01), None
patent: 2003-322048 (2003-11-01), None
patent: 2004-346851 (2004-12-01), None

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