ACTIVE MOTOR DAMPING TO MITIGATE ELECTRIC VEHICLE DRIVELINE OSCILLATIONS
First Claim
1. A method for actively dampening driveline oscillations comprising a motor torque output driven by an electric machine in a motor vehicle having an antilock brake system comprising the steps of:
- providing a motor torque output during a drive operation via the electric machine to drive at least two drive wheels on a motor vehicle; and
continuously controlling the motor torque output via a motor torque output signal to effectively dampen driveline oscillations comprising the motor torque output during an antilock brake system operation that occurs when the antilock brake system is active at at least one of the at least two drive wheels.
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0 Petitions
Accused Products
Abstract
A system and method for actively damping driveline oscillations in a motor vehicle having a traction motor to drive a vehicle'"'"'s drive wheels and an antilock brake system (ABS). A traction motor controller controls a torque output signal of the motor to effectively to dampen driveline oscillations during an ABS operation. A proportional, a proportional derivative, or a derivative controller may be used to generate the torque output signal based on at least one of motor speed, an average of the drive wheel speeds, a difference in the two speeds, a motor angular acceleration, an average wheel angular acceleration, and a difference in the angular accelerations. Motor speed signals and average drive wheel speed signals may be filtered to eliminate high frequency components of each speed signal. Additionally, amplitude of the torque output signal may be limited within a positive upper and a negative lower active motor damping limit.
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Citations
20 Claims
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1. A method for actively dampening driveline oscillations comprising a motor torque output driven by an electric machine in a motor vehicle having an antilock brake system comprising the steps of:
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providing a motor torque output during a drive operation via the electric machine to drive at least two drive wheels on a motor vehicle; and
continuously controlling the motor torque output via a motor torque output signal to effectively dampen driveline oscillations comprising the motor torque output during an antilock brake system operation that occurs when the antilock brake system is active at at least one of the at least two drive wheels. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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2. (canceled)
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3. (canceled)
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10. A method for actively dampening driveline oscillations comprising a traction motor in a motor vehicle having an antilock brake system, comprising the steps of:
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providing a torque output during drive operation via the traction motor that drives at least two drive wheels on a motor vehicle;
using at least one of a proportional controller, a proportional derivative controller, and a derivative controller to control the torque output via a torque output signal to effectively dampen driveline oscillations comprising the traction motor torque output during an antilock brake system operation that occurs when the antilock brake system is active at at least one of the at least two drive wheels. - View Dependent Claims (11, 12, 13)
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14. A method for actively dampening driveline oscillations comprising a traction motor in a motor vehicle having a antilock brake system comprising the steps of:
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providing a torque output via the traction motor that drives at least two drive wheels on a motor vehicle during a drive operation;
calculating a rotational speed of the traction motor at the at least two drive wheels;
calculating an average rotational speed of the at least two drive wheels; and
inputting at least one of the calculated motor speed at the wheels and the average wheel speed of the at least two drive wheels into at least one of a proportional controller, a proportional-derivative controller, and a derivative controller to control a torque output signal to adjust the traction motor torque output during an antilock brake system operation that occurs when the antilock brake system is active at at least one of the at least two drive wheels. - View Dependent Claims (15, 16, 17, 18)
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19. An active damping system to actively dampen driveline oscillations comprising a traction motor in a motor vehicle, the active damping system comprising:
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a traction motor that provides a torque output to at least two drive wheels on a motor vehicle during a drive operation;
a traction motor controller; and
an antilock brake system having an antilock brake system controller that cooperates with the traction motor controller to control the torque output to dampen unwanted driveline oscillations comprising the traction motor in the driveline during an antilock brake system operation that occurs when the antilock brake system is active at at least one of the at least two drive wheels. - View Dependent Claims (20)
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Specification