Apparatus for controlling recirculated exhaust gas quantities in

Details Apparatus for controlling recirculated exhaust gas quantities in Apparatus for controlling recirculated exhaust gas quantities in

1985-05-13

1986-11-04

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

123568, F02M 2506

Patent

active

046205209

ABSTRACT:
An apparatus is proposed which serves to control the quantity of exhaust gas recirculated from the exhaust gas system of an internal combustion engine to its intake side. The apparatus includes a pneumatic final control element having a diaphragm defining a work chamber, the diaphragm arranged to actuate a valve closing member of an exhaust gas recirculation (EGR) valve. Via a control pressure line, a flow line leading to the atmosphere and a connecting line leading to the intake tube downstream of a throttle valve are connected to the work chamber. A check valve opening toward the intake tube, a reservoir and a throttle restriction are disposed in the connecting line. A bypass line having a bypass valve bypasses the throttle restriction. Disposed in the flow line is an electrofluid converter of the nozzle/bounce plate type, by means of which, triggered by an electronic control unit in accordance with operating variables of the engine, a predetermined pressure drop between the atmosphere and the pressure in the work chamber can be established.

REFERENCES:
patent: 4009700 (1977-03-01), Engels et al.
patent: 4150648 (1979-04-01), Ogita
patent: 4177777 (1979-12-01), Maruyama et al.
patent: 4271811 (1981-06-01), Suzuki et al.
patent: 4353385 (1982-10-01), Maisch et al.
patent: 4367720 (1983-01-01), Miyoshi et al.
patent: 4495922 (1985-01-01), Fujimura et al.

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