Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2006-09-12
2006-09-12
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090160, C123S405000, C123S568220, C123S677000, C701S105000, C701S109000
Reexamination Certificate
active
07104228
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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Alleman Hall McCoy Russell & Tuttle LLP
Ford Global Technologies LLC
Lippa Allan J.
Riddle Kyle M.
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