Electromechanical Parking Brake Piston Gap Control
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Solution Overview
Problem
Conventional electromechanical parking brake systems fail to maintain adequate braking force when parked on a sloping road due to an unsecured gap between primary and secondary pistons, leading to insufficient booster power and potential safety hazards.
Innovation Solution
A method of controlling a braking system that secures a gap between primary and secondary pistons by adjusting hydraulic pressure, allowing the primary piston to operate the secondary piston using electromechanical elements, and utilizing a hydraulic pump to generate braking force, ensuring responsive booster power and reducing the capacity of the electric motion motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the gap between primary piston and secondary piston is not secured in conventional electromechanical parking brake system, then the structure is simpler, but additional braking force cannot occur and larger motor capacity is required
Solution Approach 1:
The system pre-secures the gap between the primary piston and secondary piston through controlled hydraulic pressure adjustment before primary braking is needed. This preliminary positioning ensures that when primary braking is activated, the pistons are already in the correct configuration to generate booster power, eliminating the need for larger motor capacity during actual braking operations.
Solution Approach 2:
The invention utilizes hydraulic pressure control to manage the gap between pistons. By adjusting hydraulic pressure, the system can precisely position the primary piston relative to the secondary piston, enabling the area difference between pistons to generate booster power without requiring additional motor capacity.
2Ease of operation
If manual parking brake operation is required, then the system structure is simpler, but driver convenience deteriorates and safety accidents increase
Solution Approach 1:
The electromechanical parking brake system performs parking braking automatically through motor-driven actuation without requiring manual lever operation. The system uses the motor's driving torque to apply and release the parking brake, making the operation as simple as pressing a button while maintaining reliable braking function.
Solution Approach 2:
The invention replaces the traditional manual mechanical parking brake operation with an electromechanical system. The motor-driven mechanism substitutes for manual lever manipulation, providing automated control while maintaining the mechanical braking function through integrated electromechanical components.
3Reliability
If electromechanical element is used for parking brake, then parking operation convenience is improved, but braking force may be insufficient on sloping roads without proper gap control
Solution Approach 1:
The system dynamically adjusts hydraulic pressure parameters to control the gap between pistons, ensuring optimal braking force generation. By changing the hydraulic pressure parameter, the system maintains the correct spatial relationship between pistons to maximize the area difference effect and generate sufficient braking force on sloping roads.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances braking responsiveness and stability by securing a gap between the pistons, allowing effective operation of booster power and reducing the motor's capacity, thereby providing a compact and economically efficient braking system.
Implementation Method 1
a step of starting parking braking by adjusting a hydraulic pressure of a complex caliper unit that is provided to any one of a front wheel and a rear wheel, and a hydraulic caliper unit that is provided to the other one to perform braking by operating at least one of a hydraulic circuit system and an electromechanical element
Implementation Method 2
pressing contacting by a primary piston disposed at the complex caliper unit to operate a secondary piston disposed at the complex caliper unit so as to be operated by the hydraulic circuit system to press a brake pad by the electromechanical element
Data Source
AI summary
A method of controlling a braking system using a brake device having an electromechanical parking function uses a brake device having an electromechanical parking function includes: a parking release and preliminary braking step of releasing a limitation of an operation location of an electromechanical element, pressing a secondary piston by a primary piston by operating the electromechanical element, and generating a braking force in the front wheel and the rear wheel by operating a hydraulic pump that is connected to a hydraulic circuit system; a primary piston backward moving step of allowing oil inflow of an accumulator for a complex caliper unit and separating the primary piston from the secondary piston by moving the primary piston; and a primary piston forward pressing step of blocking oil inflow of an accumulator for the complex caliper unit and pressing the secondary piston by moving the primary piston by the electromechanical element.