Wheel speed correction device which compensates for changes in tire diameter and during vehicle turns
First Claim
1. A wheel speed correction device for use in a vehicle having a plurality of wheels and a wheel behavior control device, comprising:
- means for measuring a wheel rotation angular speed of each wheel;
means for correcting a coefficient representing a tire diameter for each wheel;
means for calculating diameter-corrected wheel speeds for left and right wheels of the vehicle using the measured angular speed and the corrected coefficient;
means for obtaining a turning correction amount from a difference between the diameter-corrected wheel speeds of the left and right wheels; and
means for correcting the diameter-corrected wheel speed using the turning correction amount and for producing a turning-corrected wheel speed for each wheel, so that the turning-corrected wheel speed is provided as a wheel speed to be used in a control logic of the wheel behavior control device.
1 Assignment
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Accused Products
Abstract
A wheel speed correction device for use in a vehicle corrects for the change of the circumferential wheel speed caused by variations in the wheel tire diameter, differences in the paths of the left and right wheels when the vehicle turns, and/or abnormal slipping between the tire and the road surface. The wheel speed correction device has a device for measuring a wheel rotation angular speed of each wheel, a device for correcting a coefficient representing a tire diameter and producing a corrected coefficient for each wheel, a device for calculating, from the measured angular speed, a diameter-corrected wheel speed using the corrected coefficients, a device for obtaining a turning correction amount from a difference between diameter-corrected wheel speeds of the left and right wheels, and a device for correcting the diameter-corrected wheel speed using the turning correction amount.
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Citations
15 Claims
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1. A wheel speed correction device for use in a vehicle having a plurality of wheels and a wheel behavior control device, comprising:
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means for measuring a wheel rotation angular speed of each wheel; means for correcting a coefficient representing a tire diameter for each wheel; means for calculating diameter-corrected wheel speeds for left and right wheels of the vehicle using the measured angular speed and the corrected coefficient; means for obtaining a turning correction amount from a difference between the diameter-corrected wheel speeds of the left and right wheels; and means for correcting the diameter-corrected wheel speed using the turning correction amount and for producing a turning-corrected wheel speed for each wheel, so that the turning-corrected wheel speed is provided as a wheel speed to be used in a control logic of the wheel behavior control device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification