Traction control system for automotive vehicles
First Claim
1. A traction control system for an automotive vehicle, comprising:
- a traction reducing means for reducing traction created through at least one driven wheel, said traction reducing means being operated during an acceleration-slip control;
an acceleration-slip detecting means for monitoring an acceleration-slip state of said at least one driven wheel;
a turning degree deriving means for deriving a degree of turn of the vehicle;
a change-rate derivation means for deriving a rate of change in said turning degree; and
a driving-torque recovery control means for increasingly compensating a recovery amount of driving torque created by said at least one driven wheel in accordance with a decrease in the turning degree of the vehicle, during the acceleration-slip control when said recovery control means determines on the basis of the rate of change in the turning degree that the vehicle is in a transient state from turning to straight-ahead driving.
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Accused Products
Abstract
A traction control system for an automotive vehicle comprises, a brake fluid pressure control actuator associated with at least driven wheels for reducing traction created through the driven wheels, and sensors for monitoring an acceleration-slip state of at least one of the driven wheels. A recovery control unit is arranged for deriving a degree of turn of the vehicle, and for deriving a rate of change in the vehicle turning degree. The recovery control unit is responsive to the change-rate in the turning degree during an acceleration-slip control, for controlling traction in a transient state shifting from turning to straight-ahead driving, in such a manner as to increase a recovery amount of driving torque caused by the driven wheel as the turning degree is weakened.
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Citations
8 Claims
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1. A traction control system for an automotive vehicle, comprising:
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a traction reducing means for reducing traction created through at least one driven wheel, said traction reducing means being operated during an acceleration-slip control; an acceleration-slip detecting means for monitoring an acceleration-slip state of said at least one driven wheel; a turning degree deriving means for deriving a degree of turn of the vehicle; a change-rate derivation means for deriving a rate of change in said turning degree; and a driving-torque recovery control means for increasingly compensating a recovery amount of driving torque created by said at least one driven wheel in accordance with a decrease in the turning degree of the vehicle, during the acceleration-slip control when said recovery control means determines on the basis of the rate of change in the turning degree that the vehicle is in a transient state from turning to straight-ahead driving.
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2. A traction control system for an automotive vehicle, comprising:
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a traction reducing means for reducing traction created through at least one driven wheel, said traction reducing means being operated during an acceleration-slip control; an acceleration-slip detecting means for monitoring an acceleration-slip state of said at least one driven wheel; a turning degree deriving means for deriving a degree of turn of the vehicle; a change-rate derivation means for deriving a rate of change in said turning degree; and a driving-torque recovery control means for increasingly compensating a recovery amount of driving torque created by said at least one driven wheel in linear proportion to an increase in a negative change-rate in the turning degree, during the acceleration-slip control when said recovery control means determines on the basis of the rate of change in the turning degree that the vehicle is in a transient state from turning to straight-ahead driving. - View Dependent Claims (3, 4, 5, 6)
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7. A traction control system for an automotive vehicle, comprising:
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a traction reducing means for reducing traction created through at least one driven wheel, said traction reducing means being operated during an acceleration-slip control; an acceleration-slip detecting means for monitoring an acceleration-slip state of said at least one driven wheel; a turning degree deriving means for deriving a degree of turn of the vehicle; a change-rate derivation means for deriving a rate of change in said turning degree; a driving-torque recovery control means for increasingly compensating a recovery amount of driving torque created by said at least one driven wheel in linear proportion to an increase in a negative change-rate in the turning degree, during the acceleration-slip control when said recovery control means determines on the basis of the rate of change in the turning degree that the vehicle is conditioned in a transient state from turning to straight-ahead driving; tandem throttle valves, comprising a first throttle valve operated in synchronization with a depression of an acceleration pedal and a second throttle valve controlled by a motor; wherein said recovery control means operates said traction reducing means in said transient state during the acceleration-slip control, such that a throttle opening angle of said second throttle valve is increased in linear proportion to a magnitude of said recovery amount. - View Dependent Claims (8)
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Specification