Cold idle adaptive air-fuel ratio control utilizing lost...

Details Cold idle adaptive air-fuel ratio control utilizing lost... Cold idle adaptive air-fuel ratio control utilizing lost...

2006-05-31

2008-09-23

Solis, Erick (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C123S685000, C123S686000

Reexamination Certificate

active

07426926

ABSTRACT:
A method for controlling fueling of an engine, the method comprising during an engine cold start and before the engine is warmed to a predetermined level, transitioning from open-loop fueling to closed-loop fueling, where during closed-loop fueling feedback from an exhaust gas oxygen sensor is utilized and where said closed-loop fueling generates a cycling of delivered fuel in maintaining exhaust air-fuel ratio at a desired level; and providing a fueling adjustment to a subsequent engine start in response to fueling information, said fueling information obtained over at least a complete cycle of closed-loop fueling following said transition from open-loop fueling.

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