Catalyst deterioration suppressing apparatus and method

Details Catalyst deterioration suppressing apparatus and method Catalyst deterioration suppressing apparatus and method

2005-05-17

2005-05-17

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Having sensor or indicator of malfunction, unsafeness, or...

C060S274000, C060S285000, C060S286000, C123S481000, C123S19800E

Reexamination Certificate

active

06892527

ABSTRACT:
A catalyst deterioration suppressing apparatus and method stops supply of fuel when an engine is decelerating, and prohibits the supply of fuel from being stopped when the catalyst temperature is equal to or higher than a predetermined temperature when the engine is decelerating. When the supply of fuel is prohibted from being stopped, the air-fuel ratio is prohibited from being feedback-controlled. As a result, it is possible to control the air-fuel ratio in a stable manner while suppressing deterioration of a catalyst.

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