Hydraulic Pressure Control Unit Pulsation Reducer
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Solution Overview
Problem
Existing brake hydraulic pressure control units face challenges in reducing pulsations in brake fluid pressure, which can lead to noise and discomfort, and require complex structures for the throttle and check valves to manage fluid reflux and volume effectively.
Innovation Solution
A hydraulic pressure control unit with a pulsation reducer that includes a pressure change suppressor and a throttle valve with a spring-actuated valve body, which adjusts flow rate based on pressure, and a check valve to prevent reflux, simplifying the structure and sharing components to reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the volume of the suppressing element is increased to enhance pulsation reduction effect, then the pulsation reduction effect is improved, but the device complexity increases due to the need for additional components like check valve and throttle valve
Solution Approach 1:
The patent combines the check valve and throttle valve into a single integrated component. The valve body serves dual functions: it acts as a check valve to prevent brake fluid reflux into the master cylinder, and simultaneously functions as a throttle valve to control fluid flow rate. This merging eliminates the need for separate components, reducing assembly steps and overall device complexity while maintaining the required pulsation reduction performance.
Solution Approach 2:
The valve body is designed with multi-functionality, performing multiple roles within a single component. It provides both the check valve function (preventing reflux) and the throttle valve function (controlling flow rate), thereby reducing the total number of components needed in the system and simplifying the overall structure.
2Reliability
If separate structures for throttle valve and check valve are used, then the functions are reliably performed, but the assembly process becomes more complex and costly
Solution Approach 1:
The patent merges the throttle valve and check valve into a single integrated valve body, eliminating the need for separate assembly of these components. This reduces the number of assembly steps, lowers manufacturing complexity, and reduces costs while maintaining the functional reliability of both the throttle and check valve functions through carefully designed internal structures.
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 pulsations in brake fluid pressure, enhancing operational stability and simplifying assembly processes while reducing noise and discomfort, while also minimizing the complexity and cost of the throttle and check valve structures.
Implementation Method 1
a first spring member that urges the first valve body in a direction toward the first through-hole of the first housing
Implementation Method 2
a pressure change suppressor, a volume of which varies according to the pressure of the inflow brake fluid
Data Source
AI summary
A hydraulic pressure control unit according to the present invention is a hydraulic pressure control unit for a vehicular brake system and includes: a discharge channel (140), from which a brake fluid is discharged, a pressure of the brake fluid being increased by a pump (60); and a pulsation reducer (100) provided to an intermediate portion of the discharge channel (140). The pulsation reducer includes: a pressure change suppressor (110), a volume of which varies according to the pressure of the inflow brake fluid; and a throttle valve (120) arranged on a downstream side of the pressure change suppressor (110) in the discharge channel (140). The throttle valve (120) includes: a first housing (121) having an end surface (121a), one end of which is opened and the other end of which is provided with a first through-hole (121b), the brake fluid flowing into the first through-hole (121b); a first valve body (122) movable in an axial direction of the first housing (121) in the first housing (121); and a first spring member (124) urging the first valve body (122) in a direction toward the first through-hole (121b) of the first housing (121). The first valve body (122) includes a seal section (122b) that closes the first through-hole (121b) of the first housing (121) and is formed with a throttle hole (122ba).