Valve Block Hydraulic Circuit Layout for Brake System
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Solution Overview
Problem
Conventional valve blocks for electronic brake systems face issues with inefficient use of space, increased size due to additional components, and compatibility problems when pulsation reduction devices are added, leading to higher manufacturing costs and installation challenges.
Innovation Solution
The valve block is designed with two hydraulic circuits, symmetrically arranged bores, and adaptive flow passages that allow for the installation of pulsation reduction and damping devices without altering the block's size, enabling the same flow passages to be maintained regardless of device presence, and incorporating wheel pressure sensors within existing passages to reduce machining time and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional components (pulsation reduction device, damping device, wheel pressure sensors) are added to the valve block, then the functional completeness and braking performance are improved, but the valve block size increases and installation becomes difficult
Solution Approach 1:
The patent combines multiple components (pulsation reduction device, damping device, wheel pressure sensors) into a single integrated valve block structure. The pulsation reduction device and damping device are positioned within the valve block's internal cavity, and the wheel pressure sensors are mounted on the valve block's outer surface, merging previously separate components into one unified assembly that reduces overall system volume while maintaining all required functions.
Solution Approach 2:
The patent implements a nested arrangement where the pulsation reduction device and damping device are positioned within the internal cavity of the valve block, effectively nesting components inside the main structure. This allows multiple functional elements to occupy the same spatial envelope, reducing the overall volume required while maintaining all necessary braking control functions.
2Reliability
If the pulsation reduction device is formed in the valve block, then the braking performance is improved, but compatibility between valve blocks with and without the device becomes difficult
Solution Approach 1:
The patent implements an adaptive flow passage structure that can dynamically adjust its configuration based on the presence or absence of the pulsation reduction device. The flow passages are designed with flexible routing that automatically adapts to different component configurations, allowing the same valve block design to support both versions (with and without the pulsation reduction device) without requiring separate designs, thereby maintaining compatibility across different braking performance requirements.
3Reliability
If the valve block size is increased to accommodate additional damping device and pulsation reduction device, then the braking performance is improved, but the manufacturing cost increases
Solution Approach 1:
The patent combines multiple components (pulsation reduction device, damping device, wheel pressure sensors) into a single integrated valve block structure. The pulsation reduction device and damping device are positioned within the valve block's internal cavity, and the wheel pressure sensors are mounted on the valve block's outer surface, merging previously separate components into one unified assembly that reduces overall system volume while maintaining all required functions.
Solution Approach 2:
The patent designs a universal valve block structure that can accommodate different component configurations (with or without pulsation reduction device, with or without additional damping device) using the same basic design. This multi-functional capability allows a single valve block design to serve multiple performance requirements, reducing the need for multiple specialized designs and thereby lowering manufacturing costs through economies of scale and standardized production processes.
4Measurement precision
If wheel pressure sensors are installed using separate accommodating bores, then the measurement accuracy is ensured, but the machining time and complexity increase
Solution Approach 1:
The patent integrates the wheel pressure sensor accommodating bores into the existing valve block structure, designing the bores to serve dual purposes: maintaining precise pressure measurement capability while simultaneously utilizing the same machining operations already required for other valve block features. This integrated approach allows the accommodating bores to be machined as part of the standard valve block manufacturing process rather than as separate additional operations, thereby reducing total machining time and complexity while preserving measurement accuracy.
Data Source
AI summary
A valve block for an electronic brake system is disclosed. The valve block is configured to have two hydraulic circuits, a plurality of accommodating bores in which valves, pumps, low pressure accumulators, pressure sensors, and a motor are installed in order to control the braking hydraulic pressure supplied from a master cylinder to a wheel cylinder installed in each wheel, and a plurality of flow passages for connecting the plurality of accommodating bores, wherein on opposite side surfaces of the valve block, pump accommodating bores are formed symmetrically to each other to accommodate the pump, and first damping bores having an arrangement parallel to the pump accommodating bores are formed above the pump accommodating bores, wherein on an upper surface of the valve block, a pair of second damping bores is formed so as to be positioned above the first damping bores, and wherein first hydraulic lines are formed in a straight line from a bottom surface of the pair of second damping bores toward a bottom surface of the valve block, so that a discharge side of the pump accommodating bores and a suction side of the first damping bores, and a discharge side of the second damping bores and the bottom surface of the second damping bores are connected by the first hydraulic lines.