Valve Assembly Support Part Seal Architecture
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Solution Overview
Problem
Conventional vehicle braking systems face challenges in achieving a one-to-one pressure relationship between the control chamber and the main chamber during the hold configuration without adversely affecting the size of the exhaust port relative to the supply inlet, which affects the modulator's efficiency and size.
Innovation Solution
The valve assembly incorporates a support part with specific seals between the second movable member and the support part, and between the support part and the first movable member, allowing for a one-to-one pressure relationship in the hold configuration while maintaining the size of the exhaust port relative to the supply inlet, utilizing a housing with an inlet port, a delivery port, and an exhaust port, and including a second movable member with valve parts that move to control fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional modulator design is used to achieve hold configuration, then the pressure relationship between control chamber and main chamber is established, but the exhaust port size must be reduced relative to the supply inlet, adversely affecting flow efficiency
Solution Approach 1:
A support part is introduced as an intermediary component between the first movable member and the second movable member. This support part provides additional seal engagement surfaces that enable precise pressure relationship control without requiring reduction of the exhaust port area. The support part acts as a mediator that distributes sealing functions across multiple surfaces.
Solution Approach 2:
The sealing function is segmented across multiple surfaces: the first seal between the second movable member and support part, and the second seal between the support part and the first movable member. This segmentation allows independent optimization of each sealing interface, enabling precise pressure control while maintaining full exhaust port size.
2Volume of moving object
If the exhaust port size is reduced to achieve compact design, then the device size is reduced, but the fluid flow capacity and braking system performance deteriorate
Solution Approach 1:
The solution moves from a single-dimension sealing approach (relying on one seal surface) to a multi-dimensional sealing architecture. By introducing the support part with multiple seal engagement surfaces, the system achieves compact design without compromising flow capacity, as the seals are distributed across different spatial dimensions and surfaces.
3Measurement precision
If additional seal surfaces are added to achieve precise pressure control, then the pressure relationship accuracy is improved, but the device complexity increases
Solution Approach 1:
The support part serves multiple functions simultaneously: it provides seal engagement surfaces for precise pressure control, structural support for the movable members, and a mounting platform for the sealing interfaces. This multi-functionality achieves precise pressure control without proportionally increasing device complexity.
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 a precise one-to-one pressure relationship between the control chamber and the main chamber in the hold configuration, enhancing the modulator's efficiency and maintaining the desired size ratios, thereby improving the braking system's performance and reliability.
Implementation Method 1
there being a first seal between the second movable member and the support part and a second seal between the support part and the first movable member... ensures a precise one-to-one pressure relationship between the control chamber and the main chamber
Data Source
AI summary
A valve assembly including a housing and a first movable member which divides the housing into a control chamber and a main chamber. A second movable member has a first valve part and a second valve part and is movable to engage the first valve part with a corresponding inlet valve part to substantially prevent flow of fluid into the main chamber via an inlet port. The first movable member is provided with an exhaust valve part and is movable to engage the second valve part of the second movable member to substantially prevent flow of pressurized fluid out of the main chamber via an exhaust port. A support part is secured relative to the housing, there being a first seal between the second movable member and the support part and a second seal between the support part and the first movable member.