Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1990-05-09
1991-03-26
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
123488, 123478, 123571, F02M 2507, F02M 5100, F02D 4104
Patent
active
050020315
ABSTRACT:
A fuel control apparatus for an internal-combustion engine, capable of accurately determining fuel injection quantity according to exhaust gas recirculation rate regardless of bypass air flow rate and the atmospheric pressure. The fuel control apparatus comprises exhaust gas recirculation control means for controlling the rate of recirculation of the exhaust gas to the intake system according to negative pressure varying with the opening of the throttle valve of the engine, coefficient calculating means for determining, according to the current operating condition of the engine, a first coefficient for calculating fuel injection quantity for an exhaust gas recirculation stop mode in which the exhaust gas is not recirculated and second coefficient for calculating fuel injection quantity for an exhaust gas recirculation mode in which the exhaust gas is recirculated, and fuel injection quantity calculating means for calculating fuel injection quantity by using first and second corrected coefficients obtained by correcting the first and second coefficients according to the opening of the throttle valve, and parameters representing the operating condition of the engine.
REFERENCES:
patent: 4461263 (1984-07-01), Hasegawa
patent: 4553518 (1985-11-01), Takao et al.
patent: 4598684 (1986-07-01), Kato et al.
patent: 4782810 (1988-11-01), Shimoda et al.
patent: 4848303 (1989-07-01), Fujimoto et al.
patent: 4881509 (1989-11-01), Ohashi et al.
patent: 4938198 (1990-07-01), Suzuki
patent: 4947820 (1990-08-01), Kushi
Mitsubishi Denki & Kabushiki Kaisha
Wolfe Willis R.
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