Variable Brake Valve for Hydraulic Pressure Pulsation Control
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Solution Overview
Problem
Conventional electric hydraulic brake systems face challenges in increasing pressure and experiencing pulsation phenomena due to the inability of the flow channel to actively manage braking fluid pressure according to motor revolution per minute (RPM).
Innovation Solution
The braking apparatus includes a variable valve part mounted on the block part, which adjusts the flow amount of oil based on the flow rate discharged by the electric pump. This variable valve part consists of internal, external, cover, and adjustment valve parts, allowing for elastic support and pressure-driven adjustments to the oil flow passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fixed flow channel is used in the electric hydraulic brake system, then the structure is simple, but the system cannot actively manage braking fluid pressure according to motor RPM, causing pressure loss and pulsation
Solution Approach 1:
The flow channel is transformed from a fixed structure to a dynamic one by introducing a variable valve that changes its opening degree based on motor RPM. The valve body rotates relative to the valve seat, dynamically adjusting the flow passage area to match the pump's discharge capacity at different operating speeds, thereby eliminating pressure pulsation and improving pressure management reliability.
Solution Approach 2:
The invention changes the flow channel parameters (passage area, flow resistance) by rotating the variable valve to different positions. At low RPM, the valve restricts flow to match pump output; at high RPM, it opens wider to accommodate increased flow capacity, thus adapting the hydraulic system's flow characteristics to the motor's varying operating conditions and preventing pressure loss and pulsation.
2Stress or pressure
If the electric pump operates at high RPM to increase braking pressure, then braking force is improved, but pressure pulsation and flow instability occur
Solution Approach 1:
The system implements feedback control by sensing motor RPM and automatically adjusting the variable valve's opening degree accordingly. The control unit receives RPM signals, calculates the appropriate valve position, and actuates the variable valve to maintain stable pressure by matching the flow channel capacity to the pump's actual discharge at each operating point, thereby suppressing pressure pulsation even at high RPM operation.
3Stress or pressure
If the flow channel does not adapt to motor RPM changes, then the system structure remains simple, but pressure loss occurs during braking
Solution Approach 1:
The flow channel is transformed from a fixed structure to a dynamic one by introducing a variable valve that changes its opening degree based on motor RPM. The valve body rotates relative to the valve seat, dynamically adjusting the flow passage area to match the pump's discharge capacity at different operating speeds, thereby eliminating pressure pulsation and improving pressure management reliability.
Solution Approach 2:
The invention changes the flow channel parameters (passage area, flow resistance) by rotating the variable valve to different positions. At low RPM, the valve restricts flow to match pump output; at high RPM, it opens wider to accommodate increased flow capacity, thus adapting the hydraulic system's flow characteristics to the motor's varying operating conditions and preventing pressure loss and pulsation.
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 effectively reduces pressure pulsation amplitude and prevents losses in increased pressure performance by varying the oil passage based on flow rate, thereby enhancing the braking system's efficiency and stability.
Implementation Method 1
a block part connected to the master cylinder part, supplied with the oil, and configured to amplify the pressure of the oil as an electric pump is driven by power applied thereto
Implementation Method 2
an adjustment valve part mounted between the internal valve part and the cover valve part and configured to adjust a passage of oil by elastically supporting the internal valve part
Implementation Method 3
The solution effectively reduces pressure pulsation amplitude and prevents losses in increased pressure performance by varying the oil passage based on flow rate
Data Source
AI summary
A braking apparatus includes a pedal part pressurized for braking by a driver, a master cylinder part in which pressure of oil is amplified by the pedal part, a block part connected to the master cylinder part, supplied with the oil, and configured to amplify the pressure of the oil as an electric pump is driven by power applied thereto, a wheel cylinder part connected to the block part and configured to provide a braking force to a wheel, and a variable valve part mounted on the block part and configured to adjust the flow amount of oil based on a flow rate of the oil that is discharged by the electric pump.