Valve Block Adjustable Sensor Flow Path Brake Compatibility
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Solution Overview
Problem
Conventional valve blocks for electronic control brake systems face challenges in compatibility due to fixed pressure sensor installation and flow path restrictions, which limit the flexibility in connecting wheel cylinders and pulsation attenuation devices, leading to inefficient use of space and reduced compatibility with various hydraulic brake systems.
Innovation Solution
The valve block design includes adjustable sensor connection flow paths and accommodation bores that allow for flexible connection of wheel cylinder pressure sensors to any wheel cylinder port, enabling compatibility regardless of the connection arrangement and the presence of a pulsation attenuation device, while optimizing the use of space within the block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed installation position of the pressure sensor is used, then the valve block structure is simplified, but the compatibility with various hydraulic brake systems is degraded
Solution Approach 1:
The patent implements adjustable flow paths with variable lengths that can be dynamically configured to connect different wheel cylinder ports to the pressure sensor accommodation bore. This dynamic configurability allows the same valve block to adapt to different wheel cylinder arrangements while maintaining a fixed sensor installation position, thus resolving the contradiction between structural simplicity and system compatibility.
Solution Approach 2:
The valve block is designed with multiple wheel cylinder ports and adjustable flow paths that can serve different functions depending on the configuration. The same flow path structure can connect to different wheels (front/left/right, rear/left/right) by adjusting the flow path length, making the valve block universal across various brake system configurations without requiring multiple specialized designs.
2Reliability
If the flow path structure is changed to accommodate a pulsation attenuation device, then pressure pulsation is reduced, but the compatibility with valve blocks without the device is reduced
Solution Approach 1:
The patent separates the pulsation attenuation function into a distinct, optional component that can be independently added or removed. The flow path structure is designed with segmentation points that allow the pulsation attenuation device to be selectively inserted into the hydraulic circuit without affecting the overall valve block architecture. This enables different valve block configurations (with or without pulsation attenuation) to maintain compatibility through standardized connection interfaces.
3Ease of manufacture
If space is not optimized in the valve block, then component installation is simplified, but the valve block size increases
Solution Approach 1:
The patent utilizes nested arrangement where the adjustable flow paths are integrated within the existing valve block structure, and the pulsation attenuation device can be positioned within available internal spaces. The sensor connection flow path is routed through existing accommodation bores and channels, nesting multiple functions within the compact valve block volume without requiring additional external space, thus maintaining ease of manufacture while optimizing size.
Data Source
AI summary
Disclosed is a valve block of an electronic control brake system. The valve block of an electronic control brake system includes two hydraulic pressure circuits, and a plurality of accommodation bores at which a plurality of valves, a pump, a low-pressure accumulator, a pressure sensor, and a motor are installed so as to control braking hydraulic pressure delivered to a wheel cylinder installed at each of wheels, and a plurality of flow paths configured to connect the plurality of accommodation bores to one another, wherein a pressure sensor accommodation bore, at which the pressure sensor is installed, is provided with at least one wheel cylinder pressure sensor accommodation bore configured to accommodate the pressure sensor which is connected to each of wheel cylinder ports to detect oil pressure, and the at least one wheel cylinder pressure sensor accommodation bore is connected by a sensor connection flow path formed at the valve block, and connects a selected wheel cylinder port among the wheel cylinder ports, which are connected to wheels, to the at least one wheel cylinder pressure sensor accommodation bore by adjusting lengths of a port connection flow path, which is connected to each of the wheel cylinder ports and the sensor connection flow path.