Method of controlling a motor vehicle
AssigneeFord Global Technologies, LLC
InventorsAndreas ORTSEIFEN, Urs CHRISTEN, Stephan STRAHL, Nicholas Dashwood CRISP
Life of this patent
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Abstract
A method of controlling the operating mode of a motor vehicle includes transitioning between driving and coasting modes and vice-versa automatically in response to a driver trigger. The method controls an engine of the motor vehicle to bring a driveline driven by the engine via an electronically controlled clutch into a lash state before engaging or disengaging the electronically controlled clutch thereby preventing driveline disturbances from being produced by the transition.
Claims20
A method of controlling a motor vehicle having an engine driveably connected to an input of a driveline via an electronically controlled clutch, the method comprising:
- while the motor vehicle is in a drive mode of operation, in response to an indication that coasting is desirable, automatically transitioning to a coasting mode of operation by controlling the engine to move the driveline into a lash state in which no torque is being transmitted by the driveline and, while the driveline is in the lash state, automatically disengaging the electronically controlled clutch;
- and
- operating the motor vehicle in the coasting mode of operation.
A motor vehicle comprising:
- an engine selectively connected to an input to a driveline by an electronically controlled clutch;
- an accelerator pedal sensor to provide a signal indicative of a driver torque demand;
- and
- an electronic controller to control operation of the engine and engagement of the electronically controlled clutch programmed to automatically transition the motor vehicle from a drive mode of operation to a coasting mode of operation in response to the signal from the accelerator pedal sensor indicating that a torque demand tip-out has occurred by:
- controlling the engine to move the driveline into a lash state in which no torque is being transmitted by the driveline, and
- while the driveline is in the lash state, automatically disengaging the electronically controlled clutch to enter the coasting mode of operation.
A method of controlling a motor vehicle comprising:
- while in a drive mode of operation, responding to a tip-out of torque demand by controlling an engine to move a driveline into a lash state and then, while the driveline is in the lash state, automatically disengaging an electronically controlled clutch to transition into a coasting mode of operation;
- and
- operating in the coasting mode of operation.
Dependencies are inferred from the claim text.