Control Method For Torque Vectoring Using A Ball-Type Continuously Variable Transmission
OwnerJeffrey M. David, T. Neil McLemore +1inventors
InventorsJeffrey M. David, T. Neil McLemore, Gordon M. McIndoe
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Abstract
Provided herein is a vehicle including: an electric axle powertrain including: a continuously variable electric drivetrain comprising a motor/generator and a ball-type continuously variable planetary (CVP), a drive wheel axle operably coupled to the continuously variable electric drivetrain, and a first wheel and a second wheel coupled to the drive wheel axle; and a controller configured to control a CVP speed ratio and determine a request for torque vectoring, wherein the controller commands a change in the CVP speed ratio based on the request for torque vectoring,
Claims7
A vehicle comprising;
- an electric axle powertrain comprising:
- a continuously variable electric drivetrain comprising a motor/generator and a ball-type continuously variable planetary (CVP);
- a drive wheel axle operably coupled to the continuously variable electric drivetrain;
- and
- a first wheel and a second wheel coupled to the drive wheel axle;
- and
- a controller configured to control a GYP speed ratio and determine a request for torque vectoring,
- wherein the controller commands a change in the GYP speed ratio based on the request for torque vectoring.
A method for controlling, an electric axle powertrain having a ball-type continuously variable planetary (CVP), a drive wheel axle operably coupled to the CVP, and a first wheel and a second wheel coupled to the drive wheel axle, the method comprising the steps of:
- receiving a plurality of data signals provided by sensors located on the electric axle powertrain, the plurality of data signals comprising:
- a CVP speed ratio,
- a vehicle yaw angle,
- a first wheel speed, and
- a second wheel speed;
- determining a required vectoring torque based on the first wheel speed and the second wheel speed;
- determining a shift force command to the CVP based on the required vectoring torque;
- and
- commanding the shift force command to adjust the CVP speed ratio.
Dependencies are inferred from the claim text.