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US 8,328,687 B2Granted
Method for controlling an engine that may be automatically stopped
AssigneeFord Global Technologies, LLC
InventorsAlex O'Connor Gibson, Hong Jiang, Roger Lyle Huffmaster, Felix Nedorezov, Seung-Hoon Lee, Yuji Fujii
Life of this patent
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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 tie-up force in response to engine starting. The method may improve vehicle launch for stop/start vehicles.
Claims20
A method for starting an engine coupled to a transmission, comprising:
- stopping said engine;
- applying a tie-up force to said transmission during said engine stop;
- and
- reducing said tie-up force in response to an amount of torque transmitted to said transmission via a torque converter and an amount of force applied by a vehicle brake.
1 more element
A method for starting an engine coupled to a transmission, comprising:
- stopping said engine;
- tying up said transmission during said engine stop;
- and
- during an engine start after stopping said engine, reducing a tie-up force applied to said transmission in response to an operator input and vehicle brake force.
1 more element
A method for starting an engine coupled to a transmission, comprising:
- stopping said engine;
- applying a tie-up force to said transmission during said engine stop;
- restarting said engine in response to an operating condition, said operating condition other than an operator input;
- and
- reducing said tie-up force when a transmission input torque exceeds a threshold torque, said threshold torque decreasing as a force applied to a vehicle brake increases.
2 more elements
Dependencies are inferred from the claim text.