Apparatus for controlling vacuum pressure in internal combustion

Details Apparatus for controlling vacuum pressure in internal combustion Apparatus for controlling vacuum pressure in internal combustion

1997-12-05

2000-01-25

Schwartz, Chris

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

123295, F02D 4108, B60J 844

Patent

active

060171006

ABSTRACT:
Pressure in an air intake passage is changed according to an opening size of a throttle valve. The throttle valve is open when an engine performs a stratified charge combustion. The opening size of the throttle valve is selected based on a load applied to the engine when the engine performs a homogeneous charge combustion. A brake booster is connected to the intake passage and accumulates the pressure that is generated in the intake passage. The brake booster obtains braking force for the vehicle when the accumulated pressure is smaller than a predetermined reference value. The throttle valve is actuated by a controller to decrease the pressure in the intake passage when pressure in the brake booster detected by a pressure sensor is larger than the predetermined reference value. The reference value is corrected by the controller based on movement characteristics of the vehicle that is detected by velocity sensor.

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patent: 5875757 (1999-03-01), Mizuno
patent: 5881693 (1999-03-01), Mizuno

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