Electromechanical Braking System Valve Control for Stage Conversion
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Solution Overview
Problem
Conventional braking systems with compound caliper devices experience overshoot of total braking force and increased transition time when converting from parking brake to primary brake stages due to repeated operation of hydraulic pressure valves.
Innovation Solution
A braking system with an electromechanical braking function, incorporating a compound caliper device, hydraulic pressure producer, and brake controller that adjusts clamping force and hydraulic pressure to minimize valve operations and prevent overshoot, featuring a motor, external and internal pistons, and a hydraulic pump to optimize the transition from parking to primary braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If valves for supplying hydraulic pressure are operated several times during conversion from parking brake stage to primary brake stage, then the braking system can convert between stages, but overshoot of total braking force occurs and transition time increases
Solution Approach 1:
The brake controller closes the master valve before activating the hydraulic pump, preparing the hydraulic system in advance to receive and utilize pressure efficiently during the stage conversion, thereby reducing transition time and preventing overshoot
2Adaptability or versatility
If valves for supplying hydraulic pressure are operated several times during conversion from parking brake stage to primary brake stage, then the braking system can convert between stages, but the number of valve operations increases reducing durability
Solution Approach 1:
The master valve is closed in advance before hydraulic pump activation, preparing the system to minimize subsequent valve operations during the conversion process, thereby reducing wear and improving durability
Solution Approach 2:
The brake controller monitors the conversion process and adjusts valve operations and pump activation based on system state, optimizing the number of operations to balance functionality with component durability
3Adaptability or versatility
If conventional compound caliper device is used with repeated valve operations, then braking stage conversion is achieved, but overshoot of total braking force occurs
Solution Approach 1:
The master valve is closed before hydraulic pump activation to prepare the hydraulic system, ensuring that pressure build-up is controlled and synchronized with the release of motor clamping force, thereby preventing overshoot of total braking force during stage conversion
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
The solution reduces the number of valve operations, enhances durability, and decreases the transition period by preventing overshoot of total braking force, thereby improving the efficiency and reliability of the braking system.
Implementation Method 1
a motor and configured to press a pair of brake pads against a brake disk
Implementation Method 2
a hydraulic pump configured to increase hydraulic pressure supplied to the compound caliper device
Implementation Method 3
press a pair of brake pads against a brake disk
Data Source
AI summary
A braking system having an electromechanical braking function may include a compound caliper device including a motor and configured to press a pair of brake pads against a brake disk, a hydraulic pressure producer including a master hydraulic line receiving oil from a master cylinder, a master valve configured to open and close the master hydraulic line, a caliper hydraulic line connected to the compound caliper device, and a hydraulic pump configured to increase hydraulic pressure supplied to the compound caliper device, and a brake controller to control the motor and the hydraulic pressure producer, in which the brake controller is configured to close the master valve and decrease clamping force of the brake pads applied by the motor when a conversion condition for converting a parking brake stage into a primary brake stage is satisfied.