Brake system and control method thereof
AssigneeHl Mando Corporation
InventorsJaehyun Park, Youngjin Kwon
Life of this patent
Estimating the term…
Abstract
A brake system may include: a drum; a brake shoe including a frictional member applying frictional force to the drum; a motor moving the brake shoe; a force sensor detecting clamping force of the frictional member to the drum; and a controller electrically connected to the motor and the force sensor, and the controller may determine a first position of the frictional member to the drum at a braking force generation start time based on current applied to the motor or torque of the motor upon controlling the motor for braking, and control the motor so that an interval between the drum and the frictional member is adjusted based on the first position when the force sensor is in a failure state upon controlling the motor for releasing the braking.
Claims18
A brake system comprising:
- a drum;
- a brake shoe including a frictional member applying frictional force to the drum;
- a motor configured to move the brake shoe;
- a force sensor configured to detect clamping force of the frictional member to the drum;
- and
- a controller electrically connected to the motor and the force sensor,
- wherein the controller is configured to determine a first position of the frictional member to the drum at a braking force generation start time based on current applied to the motor or torque of the motor upon controlling the motor for braking, and
- control the motor so that an interval between the drum and the frictional member is adjusted based on the first position when the force sensor is in a failure state upon controlling the motor for releasing the braking,
- wherein the controller is configured to control the motor so that the interval between the drum and the frictional member is further increased by an interval obtained by aggregating the first position and a predetermined reference interval from the first position, when the force sensor is in the failure state upon controlling the motor for releasing the braking.
A control method of a brake system including a drum, a brake shoe including a frictional member applying frictional force to the drum, a motor configured to move the brake shoe, and a force sensor configured to detect clamping force of the frictional member to the drum, comprising:
- determining a first position of the frictional member to the drum at a braking force generation start time based on current applied to the motor or torque of the motor upon controlling the motor for braking;
- and
- controlling the motor so that an interval between the drum and the frictional member is adjusted based on the first position when the force sensor is in a failure state upon controlling the motor for releasing the braking,
- wherein the controlling of the motor so that the interval between the drum and the frictional member is adjusted based on the first position includes controlling the interval between the drum and the frictional member to be further increased by an interval obtained by aggregating the first position and a predetermined reference interval from the first position.
Dependencies are inferred from the claim text.