System and method for controlling lash crossing in a vehicle powertrain
AssigneeFord Global Technologies, LLC
InventorsTodd Mccullough, David Crist Gabriel
Life of this patent
Estimating the term…
Abstract
A vehicle is disclosed having a motor and engine selectively coupled to the motor via a clutch. The vehicle includes a controller configured to, in response to a vehicle wheel torque reversal, open the clutch to disconnect the engine from the motor, command the engine to enter a speed control mode, and control a motor output torque through a region surrounding the vehicle wheel torque reversal to reduce torque disturbances in a vehicle driveline.
Claims18
A vehicle, comprising:
- a motor;
- an engine selectively coupled to the motor via a clutch;
- and
- a controller configured to, in response to a vehicle wheel torque reversal, open the clutch to disconnect the engine from the motor, command the engine to operate in a speed control mode, and control a motor output torque through a region surrounding the vehicle wheel torque reversal to reduce torque disturbances in a vehicle driveline.
A control system for a vehicle having an engine selectively coupled to a motor via a clutch, comprising:
- a controller configured to, in response to a vehicle wheel torque reversal, disengage the clutch to disconnect the engine from the motor, operate the engine in a sailing mode, and modulate motor torque according to a predefined rate of change through a lash region surrounding the vehicle wheel torque reversal to reduce torque disturbances in a driveline.
A method for controlling a vehicle having an engine selectively coupled to a motor via a clutch, comprising:
- in response to a vehicle wheel torque reversal, disengaging the clutch to disconnect the engine from the motor, controlling the engine to operate in a speed control mode, and controlling motor torque to reduce a powertrain torque at a predefined rate through a lash region surrounding the vehicle wheel torque reversal to reduce torque disturbances in a vehicle driveline.
Dependencies are inferred from the claim text.