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US 9,108,613 B2Granted
Method and system for stopping an engine
AssigneeFord Global Technologies, LLC
InventorsAlex O'Connor Gibson, David Oshinsky, Seung-Hoon Lee, Jeffrey Allen Doering, Dennis Craig Reed
Life of this patent
Estimating the term…
Abstract
A method and a system for improving operation of a hybrid vehicle are presented. In one example, a disconnect clutch is operated in response to an engine stop request to adjust an engine stopping position during an engine shutdown. The approach may reduce engine starting time after the engine stop.
Claims15
A method for stopping an engine, comprising:
- adjusting a disconnect clutch application force in response to an engine stop request, and further adjusting a disconnect clutch slip to stop the engine at a desired position;
- and
- adjusting a driveline integrated starter/generator (DISG) torque output in response to an amount of torque transferred across a dual mass flywheel.
A method for stopping an engine, comprising:
- operating a DISG at a first speed;
- operating the engine at a second speed different than the first speed;
- adjusting the DISG and engine to a same speed in response to an engine stop request;
- adjusting a disconnect clutch application force in response to the engine stop request, where the disconnect clutch application force is increased to close a disconnect clutch from an open position;
- stopping the engine and the DISG while the disconnect clutch is closed;
- and
- ceasing spark and fuel flow to the engine and adjusting DISG torque to stop the engine at a desired position, where adjusting DISG torque to stop the engine includes rotating the engine in a reverse direction.
4 more elements
A method for stopping an engine, comprising:
- operating a DISG at a first speed;
- operating the engine at a second speed different than the first speed;
- adjusting the DISG and engine to a same speed in response to an engine stop request;
- adjusting a disconnect clutch application force in response to the engine stop request, further comprising adjusting DISG torque to cancel driveline torque oscillations from a dual mass flywheel.
1 more element
Dependencies are inferred from the claim text.