Internal-combustion engines – Spark ignition timing control – Electronic control
Reexamination Certificate
2007-06-07
2010-02-09
Huynh, Hai H (Department: 3747)
Internal-combustion engines
Spark ignition timing control
Electronic control
C123S406500, C701S111000
Reexamination Certificate
active
07658178
ABSTRACT:
Ignition timing for a combustion engine may be controlled by determining the roughness of current engine operation, comparing the determined roughness with a control roughness to determine if the determined roughness is within a threshold limit of the control roughness, and changing the ignition timing in a subsequent fuel delivery event as a function of the difference between the determined roughness and the control roughness. Preferably, the ignition timing is changed at least when the determined roughness is not within the threshold limit, although other factors may be taken into account when changing the ignition timing.
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DeGroot Kenneth P.
Fett Dennis W.
Kennie Gerald Lee
Wuttke Jeffrey P.
Chrysler Group LLC
Huynh Hai H
Smith Ralph E.
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