Engine valve assembly

Details Engine valve assembly Engine valve assembly

2006-04-18

2006-04-18

Wolfe, Jr., Willis R. (Department: 3747)

Power plants

Internal combustion engine with treatment or handling of...

Material from exhaust structure fed to engine intake

C060S304000, C123S568110

Reexamination Certificate

active

07028463

ABSTRACT:
A valve assembly defines a chamber and three ports. A first valve selectively obstructs a first port to prevent fluid communication between a secondary air injection pump and the chamber. A second valve selectively obstructs a second port to prevent fluid communication between an air intake manifold and the chamber. A third port provides fluid communication between the chamber and an exhaust manifold. The chamber thus serves as a common passageway for secondary air flowing from the pump to the exhaust manifold and for exhaust gas flowing from the exhaust manifold to the air intake manifold. In a preferred embodiment, the first and second valves are rigidly interconnected.

REFERENCES:
patent: 3911674 (1975-10-01), Goto et al.
patent: 4177641 (1979-12-01), Wakita et al.
patent: 4316438 (1982-02-01), Iizuka
patent: 6167699 (2001-01-01), Johnston et al.
patent: 2001/0032458 (2001-10-01), Suzuki et al.
patent: 2004/0237509 (2004-12-01), Bhargava et al.

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