Exhaust gas purifying system for engine

Details Exhaust gas purifying system for engine Exhaust gas purifying system for engine

2007-01-23

2007-01-23

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S284000, C060S287000, C060S300000

Reexamination Certificate

active

10853759

ABSTRACT:
An exhaust gas purifying system for an engine, including a HC trap catalyst disposed in an exhaust passage and operative to trap HC contained in the exhaust gas, and a control unit being programmed to: upon activating the HC trap catalyst after the engine is started, control a target excess air ratio to a preset value smaller than a normal value to which the target excess air ratio is controlled when the HC trap catalyst is activated, to thereby rise an exhaust gas temperature; and increase the target excess air ratio as the temperature of the HC trap catalyst rises, to thereby increase a heat quantity generated upon oxidation of the HC trapped by the HC trap catalyst.

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