Apparatus for controlling internal combustion engine

Details Apparatus for controlling internal combustion engine Apparatus for controlling internal combustion engine

1998-12-09

2000-02-22

Wolfe, Willis R.

Internal-combustion engines

Combustion chamber means having fuel injection only

Combustible mixture stratification means

123435, 123480, F02P 500, F02B 1700

Patent

active

060267798

ABSTRACT:
A cylinder direct-injection spark-ignition engine using at least a homogeneous combustion mode where early fuel-injection on intake stroke produces a homogeneous air-fuel mixture and a stratified combustion mode where late fuel-injection on compression stroke produces a stratified air-fuel mixture, is equipped with an electronic engine control unit connected to an electronic fuel injection system, an electronic spark-timing control system, and an electronically-controlled throttle valve. The control unit permits switching to a homogeneous combustion mode and changes the manipulated variable for engine torque correction to a spark-timing correction quantity, immediately when the demand for switching from stratified to homogeneous combustion mode occurs during a high-response torque correction. When the demand for switching from homogeneous to stratified combustion mode occurs during the high-response torque correction, switching to the stratified combustion mode is inhibited for a brief time duration until a required torque correction value reaches a predetermined criterion to continue the high-response torque correction based on the spark-timing correction quantity.

REFERENCES:
patent: 5660157 (1997-08-01), Minowa et al.
patent: 5875757 (1999-03-01), Mizuno
patent: 5881693 (1999-03-01), Mizuno
patent: 5947079 (1999-09-01), Sivashankar et al.

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