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US 12,679,367 B2Granted
System and method for vehicle hill hold release
AssigneeDana Corporation
InventorsNicolas Lenaerts, Stijn Goossens
Life of this patent
Estimating the term…
Abstract
A method and system for releasing a vehicle from a hill hold mode is described. In one example, torque output of an electric machine is adjusted to reduce a possibility of the vehicle moving in an unintended direction prior to or during release of the vehicle from hill hold mode.
Claims20
A method for releasing a vehicle from a hill hold mode, comprising:
- via a controller, disengaging a vehicle motion restraining device;
- in response to detection of a slip of the vehicle motion restraining device, estimating an amount of torque output via an electric machine based on a current pressure of the vehicle motion restraining device and a friction coefficient of the vehicle motion restraining device;
- and
- adjusting the electric machine to produce the estimated amount of torque output.
1 more element
A vehicle hill hold system, comprising:
- a transmission of a vehicle including one or more brakes that are operable to couple an output shaft of the transmission to a case of the transmission;
- an electric machine configured to provide propulsive effort to the vehicle;
- and
- a controller including executable instructions that cause the controller to:
- disengage one or more brakes that operable to couple the output shaft of the transmission to the case of the transmission;
- in response to detection of a slip of the vehicle motion restraining device, estimate an amount of torque output via an electric machine based on a current pressure of the one or more brakes and a friction coefficient of the one or more brakes;
- and
- adjust the electric machine to produce the estimated amount of torque output.
5 more elements
A method for releasing a vehicle from a hill hold mode, comprising:
- via a controller, disengaging a transmission clutch to unlock an output shaft of a transmission from a transmission case in response to a request to exit the hill hold mode;
- in response to detection of a slip of the vehicle motion restraining device, estimating an amount of torque output via an electric machine based on a current pressure of the transmission clutch and a friction coefficient of the transmission clutch;
- and
- adjusting the electric machine to produce the estimated amount of torque output.
1 more element
Dependencies are inferred from the claim text.