Running condition control system for vehicle and method
First Claim
1. A running condition control system for controlling a braking force applied to a vehicle when an actual running direction of the vehicle is contrary to a running direction in which the vehicle is intended to run in accordance with a vehicle operation state selected by an operator of the vehicle, comprising:
- a vehicle operation state detector that determines whether the vehicle operation state selected by the operator is a forward driving operation or a reverse driving operation;
an actual running direction detector that detects an actual running direction of the vehicle;
a braking device that applies a braking force to a predetermined wheel apart from a braking operation performed by the operator;
and a controller that;
controls the braking device to apply the braking force to a wheel which is rotating in a same direction as the actual running direction of the vehicle when the running direction of the vehicle intended by the operator, which is determined by the operation state detector, is contrary to the actual running direction of the vehicle detected by the actual running direction detector, and stops controlling the braking device to stop the application of the braking force when the braking device has been continuously controlled for a first predetermined period of time.
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Accused Products
Abstract
An executed time of a backward slipping moderation control is counted by a timer, and after a predetermined period of time is elapsed, the control is terminated. Upon the termination of the control, a control of operation of a brake actuator is executed so that a wheel cylinder pressure is decreased with a gentle slope in comparison with a normal operation of the brake actuator for terminating the control. Where the backward slipping moderation control is executed by controlling a brake fluid pressure of the brake actuator, an acceleration α of a vehicle is estimated. If the acceleration is larger than a predetermined value, a target pressure P is increased, thus generating a relatively large braking force.
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Citations
20 Claims
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1. A running condition control system for controlling a braking force applied to a vehicle when an actual running direction of the vehicle is contrary to a running direction in which the vehicle is intended to run in accordance with a vehicle operation state selected by an operator of the vehicle, comprising:
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a vehicle operation state detector that determines whether the vehicle operation state selected by the operator is a forward driving operation or a reverse driving operation;
an actual running direction detector that detects an actual running direction of the vehicle;
a braking device that applies a braking force to a predetermined wheel apart from a braking operation performed by the operator;
and a controller that;
controls the braking device to apply the braking force to a wheel which is rotating in a same direction as the actual running direction of the vehicle when the running direction of the vehicle intended by the operator, which is determined by the operation state detector, is contrary to the actual running direction of the vehicle detected by the actual running direction detector, and stops controlling the braking device to stop the application of the braking force when the braking device has been continuously controlled for a first predetermined period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 19, 20)
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15. A method for controlling a braking force applied to a vehicle when an actual running direction of the vehicle is contrary to a running direction in which the vehicle is intended to run in accordance with an operation selected by an operator of the vehicle, comprising:
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detecting whether the operation selected by the operator is a forward driving operation or a reverse driving operation;
detecting an actual running direction of the vehicle;
applying a braking force to a predetermined wheel apart from a braking operation performed by the operator;
controlling the braking force applied to a wheel which is rotating in a same direction as the actual running direction of the vehicle when the running direction of the vehicle intended by the operator is contrary to the actual running direction of the vehicle; and
stopping the application of the braking force when the braking force has been continuously controlled for a first predetermined period of time.
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18. A running condition control system for controlling a braking force of a vehicle when an actual running direction of the vehicle is contrary to a running direction in which the vehicle is intended to run in accordance with an operation of an operator of the vehicle, comprising:
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a vehicle operation state detector that determines whether the operation of the operator is a forward driving operation or a reverse driving operation;
a rotating direction detector that detects a rotating direction of each of the wheels of the vehicle; and
a controller that;
applies a first braking force to at least one wheel rotating in a direction that is contrary to the running direction intended by the operator, which is detected by the rotating direction detector, and applies a second braking force to at least one wheel rotating in a direction that is the same as the running direction intended by the operator, apart from a braking operation performed by the operator, wherein;
the first braking force applied to the at least one wheel rotating in the direction that is contrary to the running direction intended by the operator is determined depending upon a running state of the vehicle; and
the second braking force applied to the at least one wheel rotating in the direction that is the same as the running direction intended by the operator is determined depending upon a rotating state of the wheel.
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Specification