Exhaust gas recirculation method for internal combustion engines

Details Exhaust gas recirculation method for internal combustion engines Exhaust gas recirculation method for internal combustion engines

1987-01-16

1988-06-14

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

123588, 123589, F02M 2506

Patent

active

047504668

ABSTRACT:
An exhaust gas recirculation method which controls the valve opening of an exhaust gas recirculating valve to values appropriate to operating conditions of an automotive vehicle and an internal combustion engine installed therein, to thereby regulate the amount of exhaust gas recirculated from an exhaust passage to an intake passage in the engine. It is determined whether the vehicle is in a predetermined starting condition, and the valve opening of the exhaust gas recirculating valve is set to a first value when the vehicle is not in the predetermined starting condition, otherwise to a second value smaller than the first value. Preferably, the determination of whether the vehicle is in the predetermined starting condition is made based on the rotational speed of the engine and the speed of the vehicle.

REFERENCES:
patent: 4300516 (1981-11-01), Hayakawa
patent: 4349006 (1982-09-01), Gotoh et al.
patent: 4454854 (1984-06-01), Gotoh et al.
patent: 4454855 (1984-06-01), Otobe et al.
patent: 4665883 (1987-05-01), Amano et al.

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