Slippage preventing apparatus for a vehicle
First Claim
1. A slippage preventing apparatus for a vehicle with one pair of either front or rear wheels being driven and the other pair being undriven, comprising:
- driven wheel rotational speed detecting means for detecting a rotational speed of the driven wheel;
undriven wheel rotational speed detecting means for detecting a rotational speed of the undriven wheel;
cornering radius difference detecting means for detecting a difference in cornering radius between the driven wheel and the undriven wheel;
torque adjusting means for adjusting a torque to be applied to the driven wheel by increasing or decreasing the torque;
slip amount detecting means for detecting a slip amount or an amount of slippage of the driven wheel on a surface on the basis of the difference between the rotational speed of the driven wheel detected by said driven wheel rotational speed detecting means and the rotational speed of the undriven wheel detected by said undriven wheel rotational speed detecting means;
slip amount controlling means for controlling the amount of slippage by increasing or decreasing the torque applied to the driven wheel by said torque adjusting means so as to reach a target slip amount; and
correction means for correcting a control amount to be provided to said slip amount controlling means so as to compensate for deviations in detected slip amount resulting from the difference in cornering radius between the front and rear wheels detected by said cornering radius difference detecting means.
1 Assignment
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Accused Products
Abstract
As slip amounts or amounts of slippage of the driven wheels on pavement get larger, the torques to be applied to the driven wheels are reduced. The slip amounts of the driven wheels are determined on the basis of a vehicle speed and rotational speeds of the driven wheels, and the vehicle speed is determined as a vehicle speed of the vehicle body against pavement at a given reference position of the vehicle body. The torque to be reduced upon slippage of the driven wheels is corrected on the basis of a difference in cornering radius between a cornering radius at the reference position and a cornering radius of the driven wheel.
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Citations
22 Claims
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1. A slippage preventing apparatus for a vehicle with one pair of either front or rear wheels being driven and the other pair being undriven, comprising:
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driven wheel rotational speed detecting means for detecting a rotational speed of the driven wheel; undriven wheel rotational speed detecting means for detecting a rotational speed of the undriven wheel; cornering radius difference detecting means for detecting a difference in cornering radius between the driven wheel and the undriven wheel; torque adjusting means for adjusting a torque to be applied to the driven wheel by increasing or decreasing the torque; slip amount detecting means for detecting a slip amount or an amount of slippage of the driven wheel on a surface on the basis of the difference between the rotational speed of the driven wheel detected by said driven wheel rotational speed detecting means and the rotational speed of the undriven wheel detected by said undriven wheel rotational speed detecting means; slip amount controlling means for controlling the amount of slippage by increasing or decreasing the torque applied to the driven wheel by said torque adjusting means so as to reach a target slip amount; and correction means for correcting a control amount to be provided to said slip amount controlling means so as to compensate for deviations in detected slip amount resulting from the difference in cornering radius between the front and rear wheels detected by said cornering radius difference detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A slippage preventing apparatus for a vehicle, comprising:
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driven-wheel rotational-speed detecting means for detecting a rotational speed of a driven wheel; vehicle speed detecting means for detecting a vehicle speed on a surface at a predetermined reference position of a vehicle body; slip amount detecting means for detecting an amount of slippage, or a slip amount, of the driven wheel on a surface on the basis of the difference between the rotational speed detected by the driven wheel rotational speed detecting means and the vehicle speed detected by the vehicle speed detecting means; cornering radius difference detecting means for detecting a difference between a rotational radius at a predetermined position and a cornering radius of the driven wheel; target slip amount storing means for storing a target slip amount in advance using the difference between the rotational radius at the predetermined position and the cornering radius of the driven wheel and the vehicle speed as parameters; target slip amount selecting means for selecting the target slip amount corresponding to the vehicle speed detected by the vehicle speed detecting means and a cornering radius difference detected by the cornering radius difference detecting means from the target slip amount stored in the target slip amount storing means; torque adjusting means for increasing or decreasing torque to be applied to the driven wheel; and slippage controlling means for controlling the torque adjusting means so as to allow the slip amount of the driven wheel detected by the slip amount detecting means to reach the target slip amount selected by the target slip amount selecting means. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A slippage preventing apparatus for a vehicle in which front wheels are undriven and rear wheels are driven, comprising:
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driven-wheel rotational-speed detecting means for detecting a rotational speed of a driven wheel; undriven-wheel rotational-speed detecting means for detecting a rotational speed of an undriven wheel; slip amount detecting means for detecting an amount of slippage, or a slip amount, of the driven wheel on a surface on the basis of the difference between the rotational speed detected by the driven wheel rotational speed detecting means and the undriven-wheel speed detected by the undriven-wheel rotational-speed detecting means; cornering radius difference detecting means for detecting a difference of cornering radii of between the undriven and driven wheels; target slip amount storing means for storing a target slip amount in advance using the cornering radius difference between the front and rear wheels and the rotational speed of the undriven wheel as parameters and for adjusting the target slip amount stored in relation to the cornering radius difference determined by the cornering radius difference detecting means; target slip amount selecting means for selecting the target slip amount corresponding to the undriven-wheel rotational speed detected by the undriven-wheel rotational speed detecting means and a cornering radius difference detected by the cornering radius difference detecting means from the target slip amount stored in the target slip amount storing means; torque adjusting means for increasing or decreasing torque to be applied to the driven wheel; and slippage controlling means for controlling the torque adjusting means so as to allow the slip amount of the driven wheel detected by the slip amount detecting means to reach the target slip amount selected by the target slip amount selecting means. - View Dependent Claims (20, 21, 22)
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Specification