ELECTRIC PARKING BRAKE CONTROL DEVICE
First Claim
1. An electric parking brake control device that controls an electric actuator that drives an electric parking brake, whereinthe electric parking brake control device performs control to reach a lock position, a release position and a standby position between the lock position and the release position, wherein:
- in the lock position, the electric actuator is actuated, a friction-applying member is thereby pressed against a friction-applied member by the electric parking brake by actuating the electric actuator, and a predetermined braking force is generated;
in the release position, the friction-applying member is separated from the friction-applied member when the electric parking brake is not actuated; and
in the standby position, a transition to the lock position is performed in a shorter time than when the electric parking brake is actuated from the release position by the actuation of the electric actuator, andthe electric parking brake control device controls, when a starting operation to start moving a vehicle is performed, the electric actuator such that the standby position is reached.
1 Assignment
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Accused Products
Abstract
An EPB control device controlling an electric actuator driving an EPB, wherein the device performs control to reach a lock position, a release position and a standby position between the lock position and the release position. In the lock position, a friction-applying member is thereby pressed against a friction-applied member by the EPB by actuating the electric actuator and a predetermined braking force is generated. In the release position, the friction-applying member is separated from the friction-applied member when the EPB is not actuated. In the standby position, a transition to the lock position is performed in a shorter time than when the EPB is actuated from the release position by the actuation of the electric actuator. The device controls, when a starting operation to start moving a vehicle is performed, the electric actuator such that the standby position is reached.
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Citations
17 Claims
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1. An electric parking brake control device that controls an electric actuator that drives an electric parking brake, wherein
the electric parking brake control device performs control to reach a lock position, a release position and a standby position between the lock position and the release position, wherein: -
in the lock position, the electric actuator is actuated, a friction-applying member is thereby pressed against a friction-applied member by the electric parking brake by actuating the electric actuator, and a predetermined braking force is generated; in the release position, the friction-applying member is separated from the friction-applied member when the electric parking brake is not actuated; and in the standby position, a transition to the lock position is performed in a shorter time than when the electric parking brake is actuated from the release position by the actuation of the electric actuator, and the electric parking brake control device controls, when a starting operation to start moving a vehicle is performed, the electric actuator such that the standby position is reached. - View Dependent Claims (2, 3, 4, 14, 15, 16, 17)
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5. An electric parking brake control device comprising;
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lock control means for performing normal lock control in which a propeller shaft is moved in one direction by driving a motor to rotate in a positive direction and a parking brake force by an electric parking brake is generated by moving a friction-applying member in a direction toward a friction-applied member attached to a wheel in accordance with the movement of the propeller shaft, and after that, the wheel is brought into a locked state by stopping the drive of the motor and holding the parking brake force, and release control means for performing release control in which the propeller shaft is moved in a direction opposite to the one direction by driving the motor to rotate in a reverse direction and the parking brake force by the electric parking brake is reduced by moving the friction-applying member in a direction away from the friction-applied member in accordance with the movement of the propeller shaft, and after that, the wheel is brought into a released state by stopping the drive of the motor and releasing the parking brake force, the electric parking brake control device further comprising; starting state determination means for determining that normal starting is performed when a transition to traveling is performed after a vehicle has started moving, and for determining that a start failure occurs when the transition to traveling cannot be performed; accelerator release control determination means for determining whether a starting operation is performed when the lock control is being performed or when in the locked state; accelerator release control means for moving the propeller shaft to a standby position when the accelerator release control determination means determines that the starting operation is performed, the standby position being between a lock position where the locked state is established and a release position where the released state is established; standby cancellation release control means for performing the release control and moving the propeller shaft from the standby position to the release position when the starting state determination means determines that the normal starting is performed; and start failure lock control means for performing start failure lock control when the starting state determination means determines that the start failure has occurred, and for generating a parking brake force by causing the propeller shaft to move in the one direction by driving the motor to rotate in the positive direction. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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Specification