Pressure Buffer Device Damping Force Responsiveness
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Solution Overview
Problem
Existing pressure buffer devices struggle to enhance damping force responsiveness in high-speed ranges, particularly during sudden changes like steep turns or bad road conditions, while maintaining effective vibration reduction and comfort.
Innovation Solution
A pressure buffer device with a damping force adjusting mechanism that includes a cylinder with partitioned liquid chambers, a channel section, and a releasing and blocking mechanism, featuring inflow sections with varying cross-sectional areas to optimize liquid flow and damping force adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a damping force adjusting mechanism increases damping force in low-frequency range and reduces damping force in high-frequency range, then riding comfort is improved, but responsiveness of damping force in high-speed range deteriorates
Solution Approach 1:
The liquid flow path is segmented into multiple channels with different cross-sectional areas (first inflow section with smaller area, second inflow section with larger area). This segmentation allows different flow rates to be provided for different operating conditions, enabling both comfort and responsiveness requirements to be met simultaneously.
Solution Approach 2:
Different sections of the liquid flow path are given different local qualities through varying cross-sectional areas. The first inflow section has a smaller channel sectional area to provide restricted flow for comfort, while the second inflow section has a larger channel sectional area to provide unrestricted flow for responsiveness when needed.
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
Improves damping force responsiveness in high-speed ranges by dynamically adjusting damping forces, ensuring both stability and comfort during varying road conditions.
Implementation Method 1
a pressure buffer device including a damping force generator
Implementation Method 2
a spring configured to reduce a vibration and a shock
Data Source
AI summary
A pressure buffer device includes a bypass path configured to form a channel of the oil from the a second oil chamber to the a first oil chamber, a slit valve connected to the bypass path, configured to form an inflow route of the oil from the bypass path to a pressure chamber, and having a channel sectional area smaller than a channel sectional area of the bypass path, and a communication path connected to the bypass path, configured to form an inflow route of the oil from the bypass path to an annular recess, and having a channel sectional area larger than the channel sectional area of the slit valve and smaller than the channel sectional area of the bypass path.