Apparatus for controlling recirculated quantities of exhaust gas

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

1986-06-04

1987-06-09

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

123568, F02M 2506

Patent

active

046712461

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 control element having a diaphragm, which defines a work chamber and actuates a valve closing member of an exhaust gas recirculation valve. Via a control pressure line, the work chamber communicates with a flow line leading to the atmosphere and a connecting line leading to the intake tube downstream of a throttle valve. 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 embodied as an electrofluid converter control of the nozzle/impact plate type bypasses the throttle restriction. In the flow line is a regulating valve, also embodied as an electrofluid converter of the nozzle/impact plate type, by means of which, triggered by an electronic control unit as a function of engine operating chracteristics, a predetermined pressure drop can be established between the atmosphere and the pressure in the work chamber.

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patent: 4620520 (1986-11-01), Maisch et al.

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