Fuel control failure detection based on post O 2 sensor

Details Fuel control failure detection based on post O 2 sensor Fuel control failure detection based on post O 2 sensor

2006-02-14

2006-02-14

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S274000, C060S276000, C123S184550, C123S184550

Reexamination Certificate

active

06996974

ABSTRACT:
An engine diagnostic system includes a catalytic converter and an outlet O2sensor. The outlet O2sensor generates an outlet signal that is based on an oxygen level of exhaust gases exiting the catalytic converter. A controller adjusts a secondary fuel trim based on the outlet signal. The controller indicates a fault status if the secondary fuel trim has achieved a fuel trim limit and the outlet signal is out of a diagnostic range.

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