CLOSED-LOOP SPEED AND TORQUE DAMPING CONTROL FOR HYBRID AND ELECTRIC VEHICLES
First Claim
1. A method for minimizing driveline disturbances in a vehicle having a controller and a transmission powered by at least one traction motor, the method comprising:
- detecting a change in gear states of the transmission; and
automatically combining a damping control torque with a motor speed control torque in a closed loop, via the controller, to prevent a perceptible discontinuity in an applied motor torque from the at least one traction motor during the change in gear state.
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Accused Products
Abstract
A method for minimizing driveline disturbances in a vehicle includes using a controller to automatically combine a damping torque control command with a motor speed control command in a closed loop to prevent a perceptible discontinuity in an applied motor torque during a change in transmission gear states. The method may include calculating error values in the rotational speeds of one or two traction motors, and using the calculated error value(s) to determine a required damping torque. The controller can multiply the error value for one traction motor by a gain value of the other traction motor before determining the required damping torque. A vehicle includes first and second traction motors, a transmission, and a controller. The transmission is powered by the traction motors, and the controller combines a damping torque control command with motor speed control command to prevent a discontinuity in an applied motor torque as noted above.
22 Citations
18 Claims
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1. A method for minimizing driveline disturbances in a vehicle having a controller and a transmission powered by at least one traction motor, the method comprising:
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detecting a change in gear states of the transmission; and automatically combining a damping control torque with a motor speed control torque in a closed loop, via the controller, to prevent a perceptible discontinuity in an applied motor torque from the at least one traction motor during the change in gear state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vehicle comprising:
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a traction motor; a transmission powered by the traction motor; and a controller configured to automatically combine a damping torque control command with a motor speed control command to thereby prevent a discontinuity in an applied motor torque from the traction motor during a change in gear states of the transmission. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for minimizing driveline disturbances in a vehicle having a controller and a transmission powered by a first and a second traction motor, the method comprising:
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detecting a change in gear states of the transmission; and automatically combining a damping control torque with a motor speed control torque in a closed loop, via the controller, for each of the first and the second traction motor, to prevent a perceptible discontinuity in an applied motor torque from the first and the second traction motor during the change in gear state; wherein automatically combining a damping control torque includes calculating an error value in the rotational speed of the at least one traction motor, and then using the calculated error value to determine a required damping torque for providing the damping control torque.
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Specification