Exhaust gas purification apparatus for internal combustion engin

Details Exhaust gas purification apparatus for internal combustion engin Exhaust gas purification apparatus for internal combustion engin

1995-05-02

1996-12-31

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422169, 422168, 60297, B01D 5000, F01N 328

Patent

active

055891438

ABSTRACT:
An exhaust gas purification apparatus has a catalyst unit provided in an exhaust pipe of an engine and an absorbent provided downstream of the catalyst unit. When the engine is in a cool state, HC emitted from the engine is absorbed by the absorbent. After the engine is warmed up, the absorbed HC is desorbed by heat of an exhaust gas and returned to an upstream side of the catalyst unit the HC by heat of an exhaust gas.

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SAE Technical Paper Series #920847, "Cold-start Hydrocarbon Collection for advanced exhaust Emission control", Martin J. Heimrich et al, 1992.

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