Brake Device Auxiliary Pressure Source Boosting Response
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Solution Overview
Problem
Existing brake devices face challenges in achieving a sufficient boosting response of wheel cylinder pressure, particularly in large vehicles, which is crucial for safety features like collision avoidance control, where rapid and effective braking is essential.
Innovation Solution
A brake fluid pressure control system that includes a main pipe line, differential pressure control valve, motor-driven pump, auxiliary pressure source, and electromagnetic valves, allowing for enhanced control of brake fluid pressure by integrating these components into a block configuration and utilizing an accumulator to provide additional pressurization, thereby improving the boosting response of wheel cylinder pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If only a brake fluid pressure control actuator with a pump is used, then the device complexity is reduced, but the boosting response of wheel cylinder pressure is insufficient
Solution Approach 1:
The brake device is divided into two independent parts: a brake fluid pressure control actuator and an auxiliary pressure source. This segmentation allows each component to perform its specific function optimally - the actuator handles normal braking while the auxiliary pressure source provides rapid pressurization for emergency situations, thereby improving boosting response without requiring complete system redesign
Solution Approach 2:
The auxiliary pressure source accumulates pressurized brake fluid in advance in an accumulator. When emergency braking is detected through electromagnetic valves, this pre-stored pressurized fluid is immediately supplied to the wheel cylinder, eliminating the time delay associated with pump pressurization and achieving rapid boosting response
2Reliability
If an auxiliary pressure source is added to improve boosting response, then the safety is improved, but the device complexity increases
Solution Approach 1:
The auxiliary pressure source accumulates pressurized brake fluid in advance in an accumulator. When emergency braking is detected through electromagnetic valves, this pre-stored pressurized fluid is immediately supplied to the wheel cylinder, eliminating the time delay associated with pump pressurization and achieving rapid boosting response
Solution Approach 2:
Electromagnetic valves serve as intermediaries that control the connection between the auxiliary pressure source and the brake fluid pressure control actuator. These valves enable rapid switching between normal and emergency braking modes, allowing the auxiliary pressure source to be integrated into the existing system without requiring complete system redesign
3Ease of manufacture
If components are integrated into a block configuration, then the mountability is improved, but the manufacturing complexity increases
Solution Approach 1:
The brake device is divided into two independent parts: a brake fluid pressure control actuator and an auxiliary pressure source. This segmentation allows each component to perform its specific function optimally - the actuator handles normal braking while the auxiliary pressure source provides rapid pressurization for emergency situations, thereby improving boosting response without requiring complete system redesign
Solution Approach 2:
The brake fluid pressure control actuator serves multiple functions: it operates in normal braking mode using its pump, and in emergency braking mode it receives pressurized fluid from the auxiliary pressure source through electromagnetic valves. This multi-functionality allows a single component to handle both normal and emergency braking scenarios
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 enhances the boosting response of wheel cylinder pressure, improving safety by enabling faster and more effective braking, especially in urgent control scenarios, while also allowing for better mountability and versatility of the brake device components.
Implementation Method 1
a pump driven with the motor to suck/discharge a brake fluid
Implementation Method 2
an auxiliary pressure source accumulating a brake fluid pressure within a predetermined pressure range in an accumulator
Implementation Method 3
an electromagnetic valve controlling communication/cutoff between the fluid pressure pump, the accumulator, and the main pipe line
Implementation Method 4
a differential pressure control valve disposed in the main pipe line, dividing the main pipe line into a first pipe line on a brake fluid pressure generating means side and a second pipe line on the plurality of W/C sides, and generating a differential pressure to control a differential pressure between the first pipe line and the second pipe line
Data Source
AI summary
A brake device is characterized by being provided with an auxiliary pressure source 100 that accumulates a predetermined range of brake fluid pressure in an accumulator 102 on the basis of an operation of a fluid pressure pump 101, and that outputs the brake fluid pressure as an accumulator pressure; and an electromagnetic valve 110, 111 that controls blocking of communication between the fluid pressure pump 101 and the accumulator 102 and a main pipe line, and that transmits the accumulator pressure to a wheel cylinder when placed in communication state.