Motorcycle Wheel Force Correction via Rider Posture
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Solution Overview
Problem
Existing methods for detecting transverse and longitudinal forces in saddle-straddling type motor vehicles, such as motorcycles, are inaccurate due to variations in rider mass, posture, and other factors, leading to ineffective control of wheel forces during skid motion.
Innovation Solution
A saddle-straddling type motor vehicle equipped with a wheel force calculator and corrector that estimates and adjusts wheel forces based on rider posture, mass, and other conditions, including air resistance and center of gravity, to accurately calculate and correct wheel forces for improved control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wheel force is calculated using conventional methods based on vehicle speed and acceleration, then the calculation process is simple, but the measurement precision of wheel force is insufficient due to rider variations
Solution Approach 1:
The patent introduces an intermediary calculation approach: first calculating initial wheel force using conventional methods, then applying correction values derived from rider posture detection. This intermediary step allows the system to maintain simplicity while improving accuracy through the correction mechanism.
Solution Approach 2:
The patent replaces direct mechanical force measurement with a computational approach combining conventional force calculation with posture-based correction algorithms. This substitution avoids complex mechanical sensors while achieving higher measurement precision through information processing.
2Measurement precision
If the system accounts for rider posture and air resistance to improve wheel force accuracy, then measurement precision improves, but the device complexity increases
Solution Approach 1:
The system performs preliminary detection of rider posture and calculates air resistance effects before finalizing the wheel force determination. This preliminary action allows the correction values to be prepared in advance, streamlining the overall process while maintaining high accuracy.
Solution Approach 2:
The patent segments the wheel force calculation into distinct components: conventional force calculation, rider posture detection, air resistance estimation, and correction application. This segmentation allows each component to be optimized independently while maintaining overall system manageability.
3Adaptability or versatility
If the system uses multiple parameters including rider mass and posture for wheel force calculation, then adaptability to different riding conditions improves, but the device complexity increases
Solution Approach 1:
The patent creates a universal correction mechanism that handles multiple rider conditions (mass, posture, air resistance) through a unified calculation framework. This multi-functional approach allows the system to adapt to various riding conditions without requiring separate detection systems for each parameter.
Solution Approach 2:
The system dynamically adjusts calculation parameters based on detected rider conditions, changing the correction values according to rider mass, posture angle, and velocity. This parameter adaptation allows the system to maintain high versatility while using a relatively simple correction mechanism.
Data Source
AI summary
A saddle-straddling type motor vehicle on which an object is loadable for traveling with the motor vehicle. The motor vehicle includes a main body having a wheel, a motor that generates driving force for moving the main body, a wheel force calculator configured to calculate wheel force exerted between the wheel and a surface of a road on which the motor vehicle is traveling, and a wheel force corrector configured to correct the wheel force calculated by the wheel force calculator based on a condition of the object loaded on the motor vehicle.