Detection and control of power induced hop during traction control in a vehicle
First Claim
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1. A method for controlling a powertrain of a vehicle with wheels during a traction control event, the method comprising:
- adjusting wheel torque in response to an amplitude of a band-pass filtered driven wheel speed and a direction of acceleration of driven wheels, wherein adjusting wheel torque includes adding a negative torque to the wheels if the wheel acceleration is greater than zero, and wherein adjusting wheel torque includes adding a torque to the wheels if the wheel acceleration is less than zero, where the added torque decreases as the amplitude increases.
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Abstract
A method for controlling a powertrain of a vehicle with wheels during a traction control event is provided. The method comprises adjusting wheel torque in response to an amplitude of a band-pass filtered driven wheel speed and a direction of acceleration of driven wheels.
45 Citations
18 Claims
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1. A method for controlling a powertrain of a vehicle with wheels during a traction control event, the method comprising:
adjusting wheel torque in response to an amplitude of a band-pass filtered driven wheel speed and a direction of acceleration of driven wheels, wherein adjusting wheel torque includes adding a negative torque to the wheels if the wheel acceleration is greater than zero, and wherein adjusting wheel torque includes adding a torque to the wheels if the wheel acceleration is less than zero, where the added torque decreases as the amplitude increases. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling a powertrain of a vehicle with wheels during a traction control event, the method comprising:
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detecting a hop level by processing signals of driven wheel speed; adjusting wheel torque in a first direction and in a first proportion to a wheel slip change when an acceleration of driven wheels is greater than zero; and adjusting the wheel torque in a second direction and in a second proportion to the wheel slip change when the acceleration is less than zero, wherein the second proportion is adjusted responsive to the hop level. - View Dependent Claims (12, 13, 14, 15)
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16. A method for controlling a powertrain of a vehicle with wheels during a traction control event, the method comprising:
adjusting wheel torque responsive to a gain, a wheel speed error, and an acceleration of driven wheels, where the gain is adjusted based on a hop level, a direction of the wheel speed error, and a direction of the acceleration. - View Dependent Claims (17, 18)
Specification