Internal-combustion engines – Starting device – Control of spark ignition during starting
Reexamination Certificate
2005-08-30
2005-08-30
Dolinar, Andrew M. (Department: 3747)
Internal-combustion engines
Starting device
Control of spark ignition during starting
C123S19800E
Reexamination Certificate
active
06935295
ABSTRACT:
A method for enabling combustion-assisted engine starting includes adjusting a throttle valve to provide an air flow rate to an engine of a vehicle that is sufficient to create starting torque. Fuel that is sufficient to create starting torque is injected into a cylinder of the engine during an intake stroke of the cylinder. A spark plug of the cylinder is disabled. An intake and exhaust valve of the cylinder are disabled. The engine is deactivated. A method for activating the engine includes enabling the spark plug. A piston of the cylinder is positioned between a TDC position of a compression stroke and a BDC position of an expansion stroke or between a TDC position of an exhaust stroke and a BDC position of an intake stroke. A fuel/air charge that is sufficient to create starting torque is ignited in the cylinder. The intake and exhaust valve are activated.
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DeVries Christopher
Dolinar Andrew M.
General Motors Corporation
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