Vehicular antiskid control apparatus and antiskid control method
First Claim
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1. A vehicular antiskid control apparatus comprising:
- a first controller configured to determine whether road surface friction coefficients corresponding to a right-side wheel and a left-side wheel of a vehicle are different from each other; and
a second controller configured to reduce a fluctuation in a brake pressure of a higher-friction coefficient road surface side wheel, of the right-side wheel and the left-side wheel, caused by execution of an antiskid control state on that wheel if it is determined by the first controller that the road surface friction coefficients corresponding to the right-side wheel and the left-side wheel are different from each other, wherein during execution of the antiskid control state on a lower-friction coefficient road surface side wheel of the right-side wheel and the left-side wheel, the second controller reduces a threshold reference value from a standard braking slip amount to a reduced braking slip amount for determining to start the antiskid control state on the higher-friction coefficient road surface side wheel.
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Abstract
If a condition for starting a yaw control during an antiskid control is met while the antiskid control is being executed on one of right and left front wheels during braking on a uneven friction-coeffient road surface, the reference value for making the determination to start the antiskid control on the other one of the front wheels is reduced, and therefore the antiskid control is started at an earlier timing. If the antiskid control is executed on the wheel, the brake pressure of the wheel is controlled in a pre-set specific pattern.
25 Citations
8 Claims
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1. A vehicular antiskid control apparatus comprising:
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a first controller configured to determine whether road surface friction coefficients corresponding to a right-side wheel and a left-side wheel of a vehicle are different from each other; and
a second controller configured to reduce a fluctuation in a brake pressure of a higher-friction coefficient road surface side wheel, of the right-side wheel and the left-side wheel, caused by execution of an antiskid control state on that wheel if it is determined by the first controller that the road surface friction coefficients corresponding to the right-side wheel and the left-side wheel are different from each other, wherein during execution of the antiskid control state on a lower-friction coefficient road surface side wheel of the right-side wheel and the left-side wheel, the second controller reduces a threshold reference value from a standard braking slip amount to a reduced braking slip amount for determining to start the antiskid control state on the higher-friction coefficient road surface side wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vehicular antiskid control method comprising:
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determining whether road surface friction coefficients corresponding to a right-side wheel and a left-side wheel are different from each other; and
reducing a fluctuation in the brake pressure of a higher-friction coefficient road surface side wheel, of the right-side wheel and the left-side wheel, caused by execution of an antiskid control state on that wheel if it is determined that road surface friction coefficients corresponding to the right-side wheel and the left-side wheel are different from each other, wherein during execution of the antiskid control state on a lower-friction coefficient road surface side wheel of the right-side wheel and the left-side wheel, the second controller reduces a threshold reference value from a standard braking slip amount to a reduced braking slip amount for determining to start the antiskid control state on the higher-friction coefficient road surface side wheel.
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Specification