Dual Hydraulic Circuit Electric Brake System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric brake systems face challenges in generating stable braking pressure and coping with abnormal operations, such as actuator malfunctions, which can lead to instability and reduced performance.
Innovation Solution
The electric brake system incorporates a dual hydraulic circuit configuration with independent inlet and outlet valves connected to different power nets, allowing the system to maintain operation even if one circuit fails, and includes redundancy sensors and control units to manage power distribution and pressure regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single hydraulic circuit is used in the brake system, then the device complexity is reduced, but the reliability decreases when abnormal operations occur
Solution Approach 1:
The hydraulic circuit is divided into two independent circuits (first hydraulic circuit and second hydraulic circuit), each capable of independently supplying hydraulic pressure to the wheel brakes. This segmentation ensures that if one circuit fails, the other can still maintain brake functionality, thereby improving reliability without requiring a complete system redesign.
Solution Approach 2:
Each hydraulic circuit is equipped with its own inlet valve and outlet valve, creating locally independent control mechanisms. The first inlet valve and first outlet valve control the first hydraulic circuit, while the second inlet valve and second outlet valve control the second hydraulic circuit. This local quality approach allows independent operation and failure isolation of each circuit segment.
2Reliability
If redundancy components are added to handle abnormal operations, then the reliability improves, but the device complexity increases
Solution Approach 1:
The valve system is segmented into multiple independent valves (first inlet valve, second inlet valve, first outlet valve, second outlet valve), each controlling specific flow paths. This segmentation allows the system to maintain functionality by routing hydraulic pressure through alternative valves and circuits when abnormalities occur, improving reliability through distributed control rather than centralized complexity.
Solution Approach 2:
The dual hydraulic circuit configuration with independent inlet and outlet valves serves as a pre-prepared backup system. Before any abnormal operation occurs, the system is already configured with alternative pathways, so when a failure is detected, the control unit can immediately switch to the other circuit without requiring complex real-time decision-making or additional emergency components.
3Power
If the actuator operates in a single action manner, then the device complexity is reduced, but the braking pressure generation capability is limited
Solution Approach 1:
The actuator is divided into two independent actuators (first actuator and second actuator), each capable of independently generating hydraulic pressure through its own driver and pump chamber. This segmentation allows the system to combine the output of both actuators to generate higher braking pressure when needed, while each individual actuator maintains a relatively simple structure.
Solution Approach 2:
The first hydraulic circuit and second hydraulic circuit are merged at the wheel brake level, where both circuits can simultaneously supply hydraulic pressure to the same brake system. This merging allows the combination of power from both actuators, enhancing the overall braking pressure generation capability while maintaining independent actuator designs.
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 configuration ensures stable braking pressure and continued system functionality even during abnormal operations, reducing the risk of malfunction and enhancing overall performance and safety.
Implementation Method 1
a pressure supplier provided with a driver providing a power, and configured to generate a hydraulic pressure of a plurality of wheel brakes
Implementation Method 2
a braking pressure regulator configured to regulate a hydraulic pressure, which is generated by the pressure supplier and transmitted to the wheel brake
Data Source
AI summary
Disclosed herein is an electronic brake system. The electric brake system includes a pedal operator connected to a brake pedal and configured to transmit a braking intention to an electronic control unit; a reservoir configured to store a working fluid; a pressure supplier provided with a driver providing a power, and configured to generate a hydraulic pressure of a plurality of wheel brakes; and a braking pressure regulator configured to regulate a hydraulic pressure, which is generated by the pressure supplier and transmitted to the wheel brake, wherein the braking pressure regulator includes a first hydraulic circuit hydraulically connected to two wheel brakes and a second hydraulic circuit hydraulically connected to the other two wheel brakes, wherein the first hydraulic circuit and the second hydraulic circuit are provided with a plurality of inlet lines connecting the pressure supplier to each of the wheel brake, and a plurality of outlet lines connecting each of the wheel brake to the reservoir or connecting each of the wheel brake to the pedal operator, wherein the first hydraulic circuit and the second hydraulic circuit are hydraulically separated from each other to regulate a hydraulic pressure, which is transmitted to the wheel brake by the other hydraulic circuit when any one hydraulic circuit operates abnormally.