Clunk and shuffle management in multi-motor, multi-axle electrified drivetrains
AssigneeFord Global Technologies, LLC
InventorsMaruthi Ravichandran, Bhavesh Paradkar, Rajit Johri, Naginder Gogna, Mary Catherine Farmer, Shunsuke Okubo
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Abstract
Methods and systems are provided for a drivetrain system comprising: a first prime mover for supplying a torque to a front axle; a second prime mover for supplying a torque to a rear axle; and a controller configured to, in response to a torque reversal, command the front axle and the rear axle to cross lash zones sequentially.
Claims20
A drivetrain system comprising:
- a first prime mover for supplying a torque to a front axle;
- a second prime mover for supplying a torque to a rear axle;
- and
- a controller configured to, in response to a torque reversal, command the front axle and the rear axle to cross lash zones sequentially.
A method for a drivetrain system having a first prime mover for supplying a torque to a front axle and a second prime mover for supplying a torque to a rear axle, comprising:
- during a first driving mode and a tip-out condition;
- controlling one of the first prime mover or the second prime mover to provide negative torque and the other of the first prime mover or the second prime mover to provide positive torque, the sum of the negative torque and positive torque equal to a total driver demand torque.
A method for a drivetrain system having a first prime mover for supplying a torque to a front axle and a second prime mover for supplying a torque to a rear axle, comprising:
- during a first driving mode and a tip-out condition;
- controlling one of the first prime mover or the second prime mover to provide negative torque and the other of the first prime mover or the second prime mover to provide positive torque, the sum of the negative torque and positive torque equal to a total driver demand torque;
- and,
- during a second driving mode and the tip-out condition;
- controlling the first prime mover to provide a first negative torque and the second prime mover to provide a second negative torque, the sum of the first negative torque and the second negative torque equal to the total driver demand torque;
- and selecting one of the front axle or the rear axle to transition a lash first based on a torque capacity of the first prime mover, the torque capacity of the second prime mover, and driver tip-in magnitude.
Dependencies are inferred from the claim text.