Internal-combustion engines – Combustion chamber means having fuel injection only – Combustible mixture stratification means
Patent
1997-12-01
1999-09-14
Wolfe, Willis R.
Internal-combustion engines
Combustion chamber means having fuel injection only
Combustible mixture stratification means
123399, 12356821, 12356823, 477206, 3031143, F02D 908, F02B 1700, F02M 2507, B60T 1352
Patent
active
059505958
ABSTRACT:
A method and an apparatus for generating vacuum pressure in an engine is disclosed. The engine includes an intake path, combustion chambers and an exhaust path. Airflow in the intake path is controlled by a throttle valve. An exhaust gas recirculation (EGR) passage deflects a part of flow of the exhaust gas to the intake path from the exhaust path. An EGR valve regulates the flow of exhaust gas passing through the EGR passage. A brake booster is connected to the intake path and increases braking force of the vehicle. A pressure sensor detects the pressure in the booster. A central processing unit determines whether the detected pressure is higher than a predetermined value. The throttle valve is in a relatively open position when the engine performs stratified charge combustion. The throttle valve decreases the pressure in the intake path when the throttle valve restricts flow. The CPU controls the throttle valve to decrease the pressure in the intake path when the booster pressure is higher than the predetermined value and actuates the EGR valve to decrease the gas flow in the EGR passage. This results in better brake and engine performance.
REFERENCES:
patent: 2876876 (1959-03-01), Cummins
patent: 3799303 (1974-03-01), Stoltman
patent: 3824792 (1974-07-01), Grabb et al.
patent: 3947073 (1976-03-01), Cattaneo et al.
patent: 4610483 (1986-09-01), Matsumoto et al.
patent: 5091857 (1992-02-01), Katayama et al.
patent: 5152587 (1992-10-01), Volz
patent: 5826559 (1998-10-01), Ichimoto et al.
patent: 5846164 (1998-12-01), Harada
Mashiki Zenichiro
Yoshioka Yukio
Toyota Jidosha & Kabushiki Kaisha
Wolfe Willis R.
LandOfFree
Method and apparatus for controlling vacuum pressure in internal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for controlling vacuum pressure in internal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for controlling vacuum pressure in internal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1498861