Hydraulic Valve Unit Layout for Easier Air Bleeding
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Solution Overview
Problem
The existing hydraulic pressure systems in semi-automatic gear shift systems for vehicles, such as motorcycles, require a time-consuming and labor-intensive air bleeding process during assembly and maintenance due to complex oil passage configurations in the hydraulic valve units.
Innovation Solution
A hydraulic valve unit is designed with a main oil passage and a bypass oil passage, aligned with each other, including a one-way valve to facilitate easy air bleeding, along with a bleeder member, hydraulic pressure sensors, and an accumulator to optimize the air bleeding process, reducing the size and complexity of the unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex oil passage configuration is used in the hydraulic valve unit, then the hydraulic pressure control function is improved, but the air bleeding operation becomes time-consuming and labor-intensive
Solution Approach 1:
The patent extracts the air bleeding function from the complex hydraulic pressure control system by providing a separate, dedicated air bleeding passage that is independent from the main hydraulic oil passages. This allows air to be bled separately without interfering with the hydraulic pressure control operations, thereby reducing the time and labor required for air bleeding while maintaining reliable hydraulic pressure control.
Solution Approach 2:
The hydraulic valve unit is segmented into distinct functional passages: a main hydraulic oil passage for pressure control and a separate air bleeding passage for air removal. This segmentation allows each passage to be optimized for its specific function, enabling efficient air bleeding without compromising the hydraulic pressure control capability.
2Reliability
If a complex oil passage configuration is used in the hydraulic valve unit, then the hydraulic pressure control function is improved, but the device complexity increases
Solution Approach 1:
The air bleeding function is extracted as a separate passage system from the complex hydraulic pressure control passages. This extraction simplifies the overall device structure by clearly separating the air removal function from the hydraulic control function, making the device easier to understand and maintain while preserving full hydraulic pressure control capability.
Solution Approach 2:
The device is segmented into distinct functional modules with separate passages for hydraulic control and air bleeding. This segmentation reduces device complexity by organizing the oil passage configuration into clear, function-specific pathways rather than a single complex integrated system.
3Productivity
If the main oil passage and bypass oil passage are arranged with aligned axes, then the air bleeding efficiency is improved, but the hydraulic valve unit size may increase
Solution Approach 1:
The main oil passage and bypass oil passage are arranged with aligned axes at the same height, creating an equipotential configuration that allows air to be efficiently removed from both passages simultaneously through the same air bleeding port. This arrangement improves air bleeding efficiency while minimizing the increase in valve unit size by avoiding vertical stacking or offset positioning.
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 enables efficient and easy air bleeding, improving the assemblability and maintenance of saddle-type vehicles by simplifying the air removal process and reducing the size of the hydraulic valve unit.
Implementation Method 1
a one-way valve provided on the bypass oil passage and configured to cause the working fluid to flow in a direction from the upstream-side oil passage to the downstream-side oil passage
Implementation Method 2
a hydraulic pressure sensor configured to detect a hydraulic pressure of the working fluid
Implementation Method 3
a master cylinder configured to generate a hydraulic pressure in a working fluid
Implementation Method 4
a slave cylinder actuated by the hydraulic pressure generated in the master cylinder
Data Source
AI summary
A hydraulic valve unit includes a main oil passage configured to bring a side of a master cylinder and a side of a slave cylinder to communicate with each other, and a bypass oil passage configured to bypass a valve mechanism of the main oil passage, wherein the main oil passage and a main section of the bypass oil passage are disposed to be arranged with respective axes aligned with each other, and the main section of the bypass oil passage is disposed at the same height as the main oil passage or at a position higher than that of the main oil passage in a state in which a valve body is attached at a predetermined attachment position.