US 12,263,825 B1
System and method for transmission clutch support on hybrid electric vehicle
Michael Ericson, Chesterfield Township, MI (US); Zachary C Rogalski, Rochester Hills, MI (US); and James R Hollowell, Brownstown, MI (US)
Assigned to FCA US LLC, Auburn Hills, MI (US)
Filed by FCA US LLC, Auburn Hills, MI (US)
Filed on Jan. 31, 2024, as Appl. No. 18/428,167.
Int. Cl. B60W 10/02 (2006.01); B60W 20/40 (2016.01)
CPC B60W 10/02 (2013.01) [B60W 20/40 (2013.01); B60W 2710/083 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A vehicle system for a hybrid electric vehicle that implements a transmission clutch support mode during a stop of the vehicle, the vehicle system comprising:
a hybrid powertrain having an internal combustion engine (ICE) and at least one electric motor that provides motor torque to a driveline of the vehicle including drive wheels for propelling the vehicle;
a brake system that selectively provides brake torque to the drive wheels based on application of a brake pedal;
a clutch that selectively opens and closes to engage the powertrain with the driveline;
a controller that initiates the clutch support mode, wherein the controller:
determines whether a brake pedal release has been detected;
commands a brake hold that maintains brake pressure of the brake system subsequent to detection of the brake pedal release; and
commands the clutch to move from a disengaged position to an engaged position while cancelling the brake hold resulting in concurrent blend-out of the brake torque and blend-in of the motor torque wherein brake torque progressively decreases and motor torque progressively increases during movement of the clutch to the engaged position.