Motorcycle Valve Control for Height Adjustment Accuracy
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Solution Overview
Problem
Existing flow path control devices for vehicle height adjustment in motorcycles lack accuracy in operating valves, which affects the precision of vehicle height adjustment mechanisms.
Innovation Solution
A flow path control device comprising a first valve that transitions between closed and open states, with a communication path that communicates with a back pressure chamber, and a second valve that transitions between states to control fluid flow paths, ensuring high accuracy in valve operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single valve is used to control fluid flow paths in vehicle height adjustment, then the device complexity is reduced, but the measurement precision and operational accuracy of valve switching deteriorates
Solution Approach 1:
The single valve control function is segmented into two separate valves: a first valve that controls the primary flow path between accommodation chamber and storage chamber, and a second valve that controls the communication path and back pressure chamber. This segmentation allows each valve to be optimized for its specific control function, improving overall operational accuracy while maintaining reasonable device complexity.
2Speed
If the first pressure-receiving area is made equal to or larger than the second pressure-receiving area, then the valve response speed is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The first pressure-receiving area is deliberately designed to be smaller than the second pressure-receiving area, creating an asymmetric pressure balance. This local quality difference generates a natural pressure differential that assists valve closure, improving response speed without requiring extremely tight manufacturing tolerances on the pressure-receiving areas.
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 precise control of fluid flow paths, allowing for accurate vehicle height adjustment by ensuring the valve operates with high accuracy, effectively raising or lowering the vehicle height as needed.
Implementation Method 1
In the closed state, a first pressure-receiving area which receives a pressure of the first chamber is smaller than a second pressure-receiving area which receives a pressure of the third chamber
Data Source
AI summary
A flow path control device according to one embodiment includes a first valve which transitions between a closed state where a first flow is closed and an open state where the first flow path is open by moving toward an space from the closed state. The first valve is formed with an axial through-hole that communicates with the first flow path and the space. A pressure-receiving area of the first valve against a jack chamber is smaller than that against the space. Further, a second valve is provided in the space on a second flow path so as to transition between a first state where the axial through-hole is closed and an inflow path oriented toward the space from the jack chamber is open and a second state where it is closed and the axial through-hole is open.