Motorcycle Height Adjustment via Engine and Transmission Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle height adjusting devices for motorcycles are unable to adjust vehicle height accurately when a failure occurs in the vehicle speed sensor, leading to inconvenience during driving.
Innovation Solution
A vehicle height adjusting device that includes a damper, hydraulic pump, hydraulic jack, change-over valve, and control means using vehicle speed information from engine speed, shift position, and clutch signals to adjust vehicle height, even when the vehicle speed sensor fails, by employing a map of pre-calculated vehicle speeds from engine speeds and shift positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vehicle height adjustment is controlled based on vehicle speed sensor detection, then vehicle height can be adjusted accurately during normal operation, but the system becomes unreliable when the sensor fails
Solution Approach 1:
The control unit pre-stores multiple vehicle speed thresholds and corresponding height adjustment commands in memory before actual operation. When the vehicle speed sensor fails, the control unit can directly retrieve pre-calculated adjustment commands based on stored engine speed and transmission data, eliminating the need for real-time calculation and maintaining reliable height adjustment without increasing system complexity
Solution Approach 2:
The invention introduces an intermediary calculation method using engine speed and transmission shift position as intermediate parameters to derive vehicle speed information when the primary vehicle speed sensor fails. This intermediary approach allows the system to bypass the failed sensor while maintaining accurate height adjustment control through alternative data sources
2Adaptability or versatility
If the system uses only vehicle speed sensor data for height adjustment, then the control logic is simple, but the system cannot operate when the sensor fails
Solution Approach 1:
The control unit is designed to perform multiple functions: it normally processes vehicle speed sensor data for height adjustment, but can alternatively process engine speed and transmission data when the sensor fails. This multi-functionality allows the single control unit to adapt to different operational conditions without requiring separate control systems, maintaining versatility while managing complexity
Solution Approach 2:
The control unit pre-stores the relationship between engine speed, transmission shift position, and corresponding vehicle speed thresholds in memory during system setup. This preliminary preparation enables the system to quickly switch to alternative calculation methods when sensor failure occurs, enhancing adaptability without adding complex real-time processing logic
3Measurement precision
If real-time vehicle speed calculation is performed during sensor failure, then accurate height adjustment is maintained, but response time increases
Solution Approach 1:
The system pre-calculates and stores vehicle speed thresholds corresponding to different engine speeds and transmission shift positions before sensor failure occurs. When the sensor fails, the control unit directly retrieves these pre-stored values instead of performing real-time calculations, maintaining measurement precision while significantly reducing the time loss in height adjustment response
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
Enables accurate vehicle height adjustment based on correct vehicle speed information, ensuring stable riding conditions even if the vehicle speed sensor fails, by predicting stop and travel states and adjusting height accordingly.
Implementation Method 1
a hydraulic pump configured to perform a pumping action according to the extension/compression motion of the damper to eject hydraulic oil in the damper
Implementation Method 2
a hydraulic jack configured to receive and discharge the hydraulic oil ejected by the hydraulic pump to displace vehicle height
Data Source
AI summary
In a vehicle height adjusting device for a motorcycle, the vehicle height is adjusted on the basis of proper vehicle speed information when a failure occurs in a vehicle speed sensor. In the vehicle height adjusting device for a motorcycle, when a failure occurs in a vehicle speed sensor, a control section adjusts vehicle height by using vehicle speed information calculated from an engine speed signal, a shift position signal of a transmission, and an ON/OFF signal of a clutch.