Vehicle engine control system utilizing humidity sensor

Details Vehicle engine control system utilizing humidity sensor Vehicle engine control system utilizing humidity sensor

2008-01-15

2008-01-15

Argenbright, T. M. (Department: 3747)

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

C123S090150, C123S479000, C123S568160, C123S690000

Reexamination Certificate

active

07318409

ABSTRACT:
A system and method for utilizing a humidity sensor with an internal combustion engine of a vehicle is described. Specifically, information from the humidity sensor is used to adjust a desired air-fuel ratio to reduce engine misfire while improving vehicle fuel economy. Further, such information is also used to adjust timing and/or lift of the valve in the engine cylinder. Finally, diagnostic routines are also described.

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