Internal-combustion engines – Engine speed regulator – Open loop condition responsive
Reexamination Certificate
2005-01-18
2005-01-18
Wolfe, Willis R. (Department: 3747)
Internal-combustion engines
Engine speed regulator
Open loop condition responsive
C123S681000, C123S436000, C123S481000, C123S19800E
Reexamination Certificate
active
06843229
ABSTRACT:
An engine control system for monitoring torque increase during cylinder deactivation for a displacement on demand (DOD) engine includes a throttle and a controller. The controller adjusts a preload of the throttle prior to a cylinder deactivation event and determines whether a DOD fault is present during the cylinder deactivation event. The controller one of operates the engine without the preload in the deactivated mode and switches the engine back to the activated mode if the fault is present for a predetermined time. The controller cancels the preload if the DOD fault is present and resets the preload if the predetermined period has not expired. The DOD fault includes one of an engine speed fault, a transmission gear fault and a fueled cylinder fault.
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patent: 6615804 (2003-09-01), Matthews et al.
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patent: 20030213466 (2003-11-01), Rayl
Bauerle Paul A.
Katrak Kerfegar K.
Spitza, Jr. Alfred E.
Storch Kevin J.
Wong Kevin C.
DeVries Christopher
General Motors Corporation
Hoang Johnny H.
Wolfe Willis R.
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