SYSTEM AND METHOD FOR CONTROLLING BACKLASH IN A VEHICLE POWERTRAIN
First Claim
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1. A method for controlling backlash in a vehicle powertrain, comprising:
- controlling a torque request of the powertrain with a first control strategy after occurrence of a backlash predictor and before occurrence of a backlash; and
controlling the torque request with a second control strategy after the first control strategy and before the occurrence of the backlash such that a torque request level is below a highest torque request level obtained during the first control strategy.
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Abstract
A system and method for controlling backlash in a vehicle powertrain includes the step of controlling a torque request of the powertrain with a first control strategy after an occurrence of a backlash predictor and before an occurrence of a backlash. Another step may be employed whereby the torque request is controlled with a second control strategy after the first control strategy and before the occurrence of the backlash such that a torque request level is below a highest torque request level obtained during the first control-strategy.
11 Citations
20 Claims
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1. A method for controlling backlash in a vehicle powertrain, comprising:
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controlling a torque request of the powertrain with a first control strategy after occurrence of a backlash predictor and before occurrence of a backlash; and controlling the torque request with a second control strategy after the first control strategy and before the occurrence of the backlash such that a torque request level is below a highest torque request level obtained during the first control strategy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling backlash in a vehicle powertrain, comprising:
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controlling a torque request of the powertrain during a first time period after an occurrence of a backlash predictor and prior to an occurrence of a backlash; and reducing the torque request after the first time period and prior to an occurrence of the backlash to a torque request level that is below a torque request level obtained during the first time period. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system for controlling backlash in a vehicle powertrain, comprising:
a control system, including at least one controller, configured to implement a first control strategy for a torque request after occurrence of a backlash predictor and before occurrence of backlash, and implement a second control strategy after the first control strategy and before occurrence of the backlash such that a torque request level is below the torque request level obtained during the first control strategy. - View Dependent Claims (18, 19, 20)
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