Method to reduce backlash in a drive train
First Claim
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1. A method to reduce backlash in a drive train of a four-wheel drive vehicle, the method comprising:
- receiving rotational parameters from sensors in the four-wheel drive vehicle;
determining a torque reversal in the drive train based on the received rotational parameters; and
sending a command signal to initiate engagement of a clutch pack in a transfer case of the drive train responsive to the determination;
wherein when the torque reversal is greater in one of the front driveshaft of the drive train relative to the rear driveshaft of the drive train, or the rear driveshaft of the drive train relative to the front driveshaft of the drive train, the clutch pack engagement reduces the backlash in the drive train to backlash of the driveshaft with the smaller backlash.
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Abstract
A method to reduce backlash in a drive train of a four-wheel drive vehicle, the method including receiving rotational parameters from sensors in the four-wheel drive vehicle, determining a torque reversal in the drive train based on the received rotational parameters and sending a command signal to initiate engagement of a clutch pack in a transfer case of the drive train responsive to the determination.
29 Citations
16 Claims
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1. A method to reduce backlash in a drive train of a four-wheel drive vehicle, the method comprising:
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receiving rotational parameters from sensors in the four-wheel drive vehicle; determining a torque reversal in the drive train based on the received rotational parameters; and sending a command signal to initiate engagement of a clutch pack in a transfer case of the drive train responsive to the determination; wherein when the torque reversal is greater in one of the front driveshaft of the drive train relative to the rear driveshaft of the drive train, or the rear driveshaft of the drive train relative to the front driveshaft of the drive train, the clutch pack engagement reduces the backlash in the drive train to backlash of the driveshaft with the smaller backlash. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A computer readable medium storing a computer program comprising:
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computer readable code for receiving rotational parameters from sensors in a four-wheel drive vehicle; computer readable code for determining a torque reversal in a drive train of the four-wheel drive vehicle based on the received rotational parameters; and computer readable code for sending a command signal to initiate engagement of a clutch pack in a transfer case of the drive train responsive to the determination; wherein the computer readable code determines the torque reversal is greater in one of the front driveshaft of the drive train relative to the rear driveshaft of the drive train, or the rear driveshaft of the drive train relative to the front driveshaft of the drive train, and wherein the clutch pack engagement is responsive to the torque reversal determination to reduce backlash in the drive train to backlash of the driveshaft with the smaller backlash. - View Dependent Claims (13, 14, 15, 16)
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Specification