Suspension Stroke Speed Correction During Motorcycle Turning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing suspension mechanisms in straddle type vehicles, such as two-wheeled vehicles, face inaccuracies in stroke speed estimation due to changes in tire circumferential length during turning, which affect steering stability and riding comfort.
Innovation Solution
A control device that utilizes a wheel speed sensor to estimate stroke speed and a correction unit to adjust this estimation based on tire circumferential length changes, incorporating sensors for acceleration, angular velocity, and vehicle speed to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stroke speed is estimated based on wheel speed change in a straddle type vehicle, then the suspension control can be implemented, but the estimation accuracy deteriorates due to changes in tire circumferential length during turning
Solution Approach 1:
The system uses feedback from the wheel speed sensor to continuously monitor wheel speed changes, and the correction unit applies real-time corrections to the estimated stroke speed based on the relationship between wheel speed change and tire circumferential length variations during turning, improving measurement accuracy without additional sensors
Solution Approach 2:
The correction unit changes the estimation parameters by applying a correction value to the initially estimated stroke speed, adjusting for the variable tire circumferential length during turning based on the detected wheel speed change, thereby maintaining accuracy across different operating conditions
2Measurement precision
If additional sensors are added to improve stroke speed estimation accuracy, then the measurement precision improves, but the device complexity and vehicle cost increase
Solution Approach 1:
The existing wheel speed sensor serves multiple functions by providing data for both wheel speed monitoring and stroke speed estimation, eliminating the need for dedicated stroke speed sensors and reducing overall system complexity while maintaining accuracy through software-based correction
Data Source
AI summary
The present invention provides a control device that controls a suspension mechanism of a straddle type vehicle, comprising: a wheel speed sensor configured to detect a wheel speed of the straddle type vehicle; an estimation unit configured to estimate a stroke speed of the suspension mechanism, based on a change in the wheel speed detected by the wheel speed sensor; and a correction unit configured to correct the stroke speed estimated by the estimation unit, in accordance with a circumferential length of a grounding part of a tire changed by turning of the straddle type vehicle.