Exhaust gas recirculation control device for diesel engine

Details Exhaust gas recirculation control device for diesel engine Exhaust gas recirculation control device for diesel engine

1985-04-24

1986-12-02

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

36443106, 123569, F02M 2506

Patent

active

046257020

ABSTRACT:
The engine load signal, the engine speed signal, and the engine warm-up signal are directed to an electric control unit. The electric control unit issues an output signal depending on the engine condition; in the stage of engine warm-up, the output signal is issued from the first EGR MAP which does not permit EGR under idling of the engine and after full warm-up, it is issued from the second EGR MAP which permits EGR even under idling. Upon receiving the output signal, the electric vacuum regulating valve acts to adjust the opening degree of the EGR valve, thereby preventing the erosion and wear of the cylinder bore and the piston ring and reducing the generation of NOx.

REFERENCES:
patent: 4164032 (1979-08-01), Nohira et al.
patent: 4450825 (1984-05-01), Sekiguchi et al.
patent: 4453379 (1984-06-01), Kawamura et al.
patent: 4461263 (1984-07-01), Hasegawa
patent: 4466416 (1984-08-01), Kawamura
patent: 4495929 (1985-01-01), Maeda et al.

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