Brake Master Cylinder Reservoir Separator for Bubble Return
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Solution Overview
Problem
Existing brake master cylinders for vehicles face challenges in reducing the amount of bubbles in the lower region of the reservoir tank, which can lead to bubbles entering the hydraulic pressure chamber and compromising braking performance.
Innovation Solution
A brake master cylinder design featuring a separator with an inclined outer peripheral surface that guides bubbles from the lower region back to the upper region, enhancing the hydraulic flow passage and reducing bubble accumulation, while maintaining rigidity to prevent deformation and further bubble entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separator is provided in the reservoir tank to divide the storage chamber into upper and lower regions, then bubbles can be prevented from entering the hydraulic pressure chamber, but bubbles may accumulate in the lower region
Solution Approach 1:
The separator's lower surface in the lower region is formed with an inclined portion that slopes upward toward the outer peripheral end. This curved/inclined surface design causes bubbles that enter the lower region to rise along the slope and return to the upper region, preventing bubble accumulation while maintaining the separator's bubble-blocking function
2Manufacturing precision
If the separator is made with a rigid structure to maintain shape and prevent deformation, then manufacturing precision can be improved, but the device complexity increases
Solution Approach 1:
The separator is divided into functionally distinct regions: an upper region for blocking bubbles and a lower region with an inclined surface for bubble redirection. This segmentation allows each region to perform its specific function efficiently while maintaining overall structural simplicity and manufacturability
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 design effectively reduces the number of bubbles in the lower region of the reservoir tank, improving the credibility of bubble prevention in the hydraulic pressure chamber and maintaining the separator's rigidity to prevent deformation and further bubble entry.
Implementation Method 1
at least part of an annular portion including an outer peripheral end portion of the lower surface of the separator is formed to be inclined outwardly and upwardly as an inclined portion... bubbles that have entered the lower region are guided smoothly to the upper region along the inclined portion of the lower surface of the separator
Data Source
AI summary
A master cylinder for a brake. The master cylinder includes a cylinder main body having a hydraulic pressure chamber, a reservoir tank having a storage chamber, and a separator that is provided in the reservoir tank to divide a space in the storage chamber of the reservoir tank into an upper region and a lower region. A hydraulic fluid is storable in the hydraulic pressure chamber, and is storable in the storage chamber for thereby replenishing the hydraulic pressure chamber. The hydraulic fluid is circulatable between the upper region and the lower region, such that a liquid surface of the hydraulic fluid is in the upper region. The separator has a lower surface in the lower region. The lower surface has an inner portion, and an inclined portion that surrounds the inner portion and that is inclined outwardly and upwardly with respect to the inner portion.