Slip control system for an automotive vehicle
AssigneeMazda Motor Corporation
InventorsToru Onaka, Toshiaki Tsuyama
Life of this patent
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Abstract
A slip control system is so adapted as to start the control of the braking force from a state in which the braking force is reduced when a magnitude of deceleration of the wheel becomes equal to or larger than a predetermined value or when a slip value of the wheel becomes a value in the direction in which the wheel is likely to be locked and as to start the control of the braking force from a state in which the braking force is sustained when the deviation obtained by subtracting the wheel speed from the vehicle speed becomes equal to or larger than a predetermined value. This arrangement satisfies requirements for both preventing the wheel from being locked and shortening the braking distance.
Claims20
A slip control system for an automotive vehicle capable of controlling braking force so as not to cause a wheel to be locked at the time of braking and so as to sustain the braking force, elevate the braking force, or reduce the braking force, comprising:
- a first start means for starting the control of the braking force from a state in which the braking force is reduced, when a slip value indicative of a magnitude of deceleration of the wheel or the tendency of locking the wheel against a road surface exceeds a predetermined threshold value;
- and
- a second start means for starting the control of the braking force from a state in which the braking force is sustained, when a deviation obtained by subtracting a wheel speed from a vehicle speed reaches a predetermined value or larger.
A method of controlling a slip control system for an automotive vehicle capable of controlling braking force so as not to cause a wheel to be locked at the time of braking and so as to sustain the braking force, elevate the braking force, reduce the braking force, comprising:
- a first start step for starting the control of the braking force from a state in which the braking force is reduced, when a slip value indicative of the magnitude of deceleration of the wheel or the tendency of locking the wheel against the road surface exceeds a predetermined threshold value;
- and
- a second start step for starting the control of braking force from a state in which the braking force is sustained, when a deviation obtained by subtracting a wheel speed from the vehicle speed reaches a predetermined value or larger.
Dependencies are inferred from the claim text.