Exhaust gas recirculation control and subassemblies therefor

Details Exhaust gas recirculation control and subassemblies therefor Exhaust gas recirculation control and subassemblies therefor

1981-01-27

1985-07-30

Cohan, Alan

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

251 86, 251 612, 251214, 137489, F02B 4708

Patent

active

045314985

ABSTRACT:
A valve assembly is provided for controlling the recirculation of exhaust gases in an internal combustion engine. The assembly includes a fixed body portion having an exhaust inlet and an exhaust outlet port and a moveable transducer portion. A diaphragm is attached to the body and transducer portions to define a vacuum chamber and an atmospheric chamber in the body portion and a second atmospheric or air bleed chamber and an exhaust chamber in the transducer portion. Passages integrally formed in the diaphragm at its point of attachment to the transducer portion provide fluid communication between the two atmospheric chambers. Valve means are provided between the transducer atmospheric chamber and the vacuum chamber and between the exhaust inlet and outlet ports. A valve stem is attached to the transducer portion through a novel crimped joint, and the exhaust port valve member is mounted to the stem in a manner providing flexibility in effecting seating engagement of the valve member with the main body portion. A bearing member supports the valve stem for axial movement and is secured to the main body portion by another novel crimped joint.

REFERENCES:
patent: 2982299 (1961-05-01), Ksieski
patent: 3834366 (1974-09-01), Kingsburg
patent: 4114850 (1978-09-01), Alampresl

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