Apparatus for controlling negative pressure in internal combusti

Details Apparatus for controlling negative pressure in internal combusti Apparatus for controlling negative pressure in internal combusti

1997-06-24

1999-12-28

Dolinar, Andrew M.

Internal-combustion engines

Combustion chamber means having fuel injection only

Combustible mixture stratification means

123305, F02B 1700, F02B 500

Patent

active

060067160

ABSTRACT:
An improved apparatus for controlling brake force is disclosed. An engine selectively performs a stratified charge combustion and a uniform charge combustion. A brake booster is actuated by negative pressure an absolute value of which is greater than a predetermined magnitude. An electronic control unit actuates the throttle valve to apply the negative pressure to the brake booster when the magnitude relating to the pressure in the brake booster is smaller than the predetermined value. Engine condition is converted from the stratified charge combustion to the uniform charge combustion. A fuel injector directly injects the fuel into the cylinder to set the engine to perform the stratified charge combustion. A basic injection timing of the fuel injector is computed based on the operation state of the engine. The basic timing is advanced when the stratified charge combustion is performed and the negative pressure is applied to the brake booster.

REFERENCES:
patent: 4211312 (1980-07-01), Nogami et al.
patent: 4300515 (1981-11-01), Straubel et al.
patent: 4328669 (1982-05-01), Mort
patent: 4955339 (1990-09-01), Sasaki et al.
patent: 5676101 (1997-10-01), Kawai et al.

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