Method for starting an engine
First Claim
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1. A method for starting an engine, comprising:
- tracking engine position as spark and fuel are deactivated;
stopping the engine;
predicting a first combustion event of a cylinder for an engine start based on the tracked engine position; and
during the engine start, adjusting a transmission tie-up force in response to a timing of the first combustion event of the cylinder.
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Abstract
A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one embodiment, the method adjusts a transmission actuator in response to engine combustion during an engine start. The method may improve vehicle launch for stop/start vehicles.
66 Citations
20 Claims
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1. A method for starting an engine, comprising:
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tracking engine position as spark and fuel are deactivated; stopping the engine; predicting a first combustion event of a cylinder for an engine start based on the tracked engine position; and during the engine start, adjusting a transmission tie-up force in response to a timing of the first combustion event of the cylinder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for starting an engine, comprising:
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stopping an engine and tracking engine position during stopping the engine as spark and fuel are deactivated; adjusting at least one actuator of a transmission to control a transmission tie-up force during said engine stop; predicting a combustion event of a cylinder based on the tracked engine position; and during an engine start, adjusting said at least one actuator of said transmission to decrease said transmission tie-up force in response to a timing of the combustion event of the cylinder of said engine since stopping the engine. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for starting an engine, comprising:
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during a first condition; starting an engine while a transmission is in an operator selected state; and during a second condition, different than said first condition; stopping an engine at a first engine position and tracking engine position as spark and fuel are deactivated; predicting a first combustion event of a cylinder based on the tracked engine position; starting said engine while said transmission is in a tied-up state; and reducing a tie-up force of said transmission in response to the predicted first combustion event of the cylinder since engine stop, said occurrence of a first combustion event related to said first engine position. - View Dependent Claims (18, 19, 20)
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Specification