Control apparatus for internal combustion engine

Details Control apparatus for internal combustion engine Control apparatus for internal combustion engine

2007-03-06

2007-03-06

Argenbright, T. M. (Department: 3747)

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

Having a single combustible mixture inlet combined with...

C123S480000

Reexamination Certificate

active

11319391

ABSTRACT:
It is determined whether an internal combustion engine is in an idle state or in a non-idle state based on the throttle opening degree. DI ratio control for controlling fuel injection ratio between in-cylinder injection and port injection is performed in accordance with different control modes in the idle state and in the non-idle state. While the DI ratio control mode is basically switched according to transition between the idle and non-idle states, in the engine cold state where fuel deposition disturbing air-fuel ratio control is likely to occur, a transition delay period is provided upon transition from the non-idle state to the idle state. During the transition delay period, the control mode is fixed irrespective of the transition between the idle and non-idle states. This prevents intermittent changes of the DI ratio, and thus, prevents variation in engine output.

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