Motor-driven drum brake system and method of controlling the same
AssigneeHl Mando Corporation
InventorHongmyeong Lee
Life of this patent
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Abstract
Provided is motor-driven drum brake system including: a motor-driven drum brake including a brake shoe inside a drum and allowing the brake shoe to be pressed on an inner surface of the drum by hydraulic pressure of a wheel cylinder or an operation of a motor to perform braking; and a controller configured to control the motor to engage the motor-driven drum brake, wherein the controller is configured to, upon a total count of parking apply operations of the motor-driven drum brake being greater than a preset count when performing a parking apply operation, correct a target clamping force of the motor-driven drum brake and perform the parking apply operation according to the corrected target clamping force.
Claims7
A motor-driven drum brake system comprising:
- a motor-driven drum brake including a brake shoe inside a drum and allowing the brake shoe to be pressed on an inner surface of the drum by hydraulic pressure of a wheel cylinder or an operation of a motor to perform braking;
- and
- a controller configured to control the motor to engage the motor-driven drum brake, and correct a target clamping force of the motor-driven drum brake based on a burnishing state of the brake shoe,
- wherein the controller is configured to, upon a total count of parking apply operations of the motor-driven drum brake being greater than a preset count when performing a parking apply operation, correct the target clamping force of the motor-driven drum brake and perform the parking apply operation according to the corrected target clamping force.
A method of controlling a motor-driven drum brake system, the method comprising:
- controlling a motor-driven drum brake including a brake shoe inside a drum and allowing the brake shoe to be pressed on an inner surface of the drum by hydraulic pressure of a wheel cylinder or an operation of a motor to perform braking,
- comparing a total count of parking apply operations of the motor-driven drum brake with a preset count when performing a parking apply operation;
- correcting a target clamping force of the motor-driven drum brake based on a burnishing state of the brake shoe;
- and
- performing the parking apply operation according to the corrected target clamping force,
- wherein the correcting of the target clamping force is performed when a result of the comparison is that the total count of parking apply operations is greater than the preset count.
Dependencies are inferred from the claim text.