Deflector by-pass valve for gas from the engine

Details Deflector by-pass valve for gas from the engine Deflector by-pass valve for gas from the engine

2005-03-22

2005-03-22

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

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

C123S568310

Reexamination Certificate

active

06868841

ABSTRACT:
A deflector by-pass valve for engine exhaust gas, used with an exhaust gas recirculation system on an automobile, is integrated with the cooling system, and located before the inlet for the engine's hot gas to the water/gas heat exchanger of the EGR system. The deflector by-pass valve is activated by a vacuum/pressure pneumatic system and actuated by an electric signal from the engine's electronic control center. Its main purpose is to conduct the gas through the heat exchanger/gas cooler when cooling is required, or to recycle the gas directly to the engine, without it passing through the heat exchanger when the gas is below the minimum limit for cooling.

REFERENCES:
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patent: 5531205 (1996-07-01), Cook et al.
patent: 5732688 (1998-03-01), Charlton et al.
patent: 5740785 (1998-04-01), Dickey et al.
patent: 6062205 (2000-05-01), Bevan et al.
patent: 6135415 (2000-10-01), Kloda et al.
patent: 6575149 (2003-06-01), Gagnon
patent: 6681799 (2004-01-01), Gagnon

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