Hydraulic Valve Layout for Faster Air Bleeding in Saddle-Type Vehicles
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Solution Overview
Problem
The existing hydraulic pressure systems in gear shift systems, such as those in motorcycles, require time and labor for air bleeding operations due to complex oil passage configurations, making the process inefficient.
Innovation Solution
A hydraulic valve unit with a main oil passage and a bypass oil passage, where the bypass passage is positioned higher than the main passage, and equipped with a one-way valve, allows for easy air bleeding by aligning the passages parallel to each other, reducing the size of the valve unit and facilitating air removal from both passages.
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 oil passage is segmented into a main oil passage and a bypass oil passage. The bypass oil passage is positioned higher than the main oil passage, allowing air to be bled from the highest point first. This segmentation enables efficient air removal while maintaining the complex hydraulic pressure control functionality through the main passage.
Solution Approach 2:
The patent introduces a vertical height dimension to the oil passage design by positioning the bypass oil passage higher than the main oil passage. This dimensional arrangement creates a gravity-assisted air bleeding path, allowing air to naturally rise and be removed from the highest point, thereby simplifying the air bleeding operation without compromising the hydraulic control function.
2Reliability
If a complex oil passage configuration with multiple valves is used, then the hydraulic pressure control capability is improved, but the size of the valve unit increases
Solution Approach 1:
The bypass oil passage is merged with the main oil passage in a parallel arrangement, where both passages coexist within the same valve unit structure. This merging allows the system to maintain complex hydraulic pressure control capability through the main passage while using the bypass passage for its dual purposes: hydraulic control and air bleeding, thereby avoiding significant size increase.
Solution Approach 2:
The bypass oil passage is designed to serve multiple functions: it acts as a functional oil passage for hydraulic pressure control and simultaneously serves as the primary path for air bleeding operations. This multi-functionality reduces the need for separate dedicated air bleeding passages, thereby controlling the overall valve unit size while maintaining comprehensive hydraulic control capability.
3Reliability
If traditional air bleeding procedures are used with complex oil passages, then complete air removal can be achieved, but the operation requires significant labor and time
Solution Approach 1:
The bypass oil passage is pre-positioned at the highest point of the valve unit, creating a predetermined air bleeding path. This preliminary structural arrangement ensures that when air bleeding operations are performed, air naturally rises to the highest point (bypass passage) first, making the air removal process more straightforward and complete without requiring complex procedural steps.
Solution Approach 2:
The vertical arrangement of the bypass oil passage above the main oil passage allows the system to self-bleed air through gravity assistance. Air naturally rises to the highest point in the bypass passage, and by opening the one-way valve, air can be removed automatically with minimal external intervention, thereby improving ease of operation while ensuring complete air removal.
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 enables efficient 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
Data Source
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AI summary
A hydraulic valve unit (53) includes a main oil passage (54) 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 (55) configured to bypass a valve mechanism (56) of the main oil passage (54), wherein the main oil passage (54) and a main section (55a) of the bypass oil passage (55) are disposed to be arranged with respective axes (C4, C5) aligned with each other, and the main section (55a) of the bypass oil passage (55) is disposed at the same height as the main oil passage (54) or at a position higher than that of the main oil passage (54) in a state in which a valve body (53a) is attached at a predetermined attachment position.