Exhaust gas recirculation system for internal combustion engines

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

1979-07-31

1981-01-06

Burns, Wendell E.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

F02M 2506

Patent

active

042429978

ABSTRACT:
In an exhaust gas recirculation system for an internal combustion engine, a flow control valve is disposed within a recirculation pipe and operatively connected to a pneumatically operated servomotor to control the flow quantity of exhaust gases through the recirculation pipe, and an orifice is disposed within the recirculation pipe upstream of the valve to form a space between the valve and the orifice. A pressure regulator serves to modulate negative pressure from an engine intake manifold to the servomotor on a basis of pneumatic pressure applied thereto and pressure in the space. The pneumatic pressure applied to the pressure regulator is electrically controlled to satisfy the following equation.

REFERENCES:
patent: 4142495 (1979-03-01), Lahiff
patent: 4163435 (1979-08-01), Nakajima
patent: 4164206 (1979-08-01), Tuelle
patent: 4173205 (1979-11-01), Tuelle
patent: 4177777 (1979-12-01), Maroyama et al.
patent: 4195531 (1980-04-01), Okamura

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