Exhaust gas recirculation system for an engine

Details Exhaust gas recirculation system for an engine Exhaust gas recirculation system for an engine

1993-08-31

1995-01-24

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

Control element responds proportionally to a variable signal...

60287, 60302, 60324, 422109, 422115, 422177, G05D 700, F01N 300, F01N 708

Patent

active

053840984

ABSTRACT:
The exhaust gas purification system for an engine with two banks provides a pair of bypasses for interchangeably communicating with each of the exhaust pipes from the two banks. A changeover valve is inserted at the junction point of the bypass and is inserted at the junction point of the bypass and the exhaust pipe for changing the flow of the exhaust gas. When the catalyst temperature is lower than a predetermined value, the exhaust gas flows directly into the catalyst. When the catalyst temperature is higher than the predetermined value, the exhaust gas flows into the bypasses for cooling the exhaust gas and then into the other side catalyst. Therefore, the activity performance of said catalyst is improved in both cold and hot states.

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