Two-Wheeler Engine Cutoff Control for Inclination Sensor Calibration
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Solution Overview
Problem
Existing engine-driven two-wheeled vehicle sensors, particularly those using MEMS accelerometers, face issues with calibration loss during maintenance or repair, leading to inaccurate inclination measurements that can cause unintended engine shutdowns or failures to detect significant inclinations, posing safety risks.
Innovation Solution
An electronic control unit with a MEMS accelerometer measures lateral inclination and uses two thresholds to differentiate between stable and unstable angles, incorporating a time-based verification process to ensure accurate engine cutoff only when the vehicle is stationary and stable, and provides warnings for calibration errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a MEMS accelerometer is mounted directly near the engine for compactness, then device complexity is reduced, but measurement precision deteriorates due to calibration loss during maintenance
Solution Approach 1:
The system performs a preliminary verification of the inclination sensor calibration when the vehicle is stationary and supported on its stand. It compares the measured inclination angle with expected values and stores calibration correction data before normal operation begins, ensuring accurate measurements without requiring complex mounting procedures
Solution Approach 2:
The system continuously monitors the inclination angle measurements and compares them against calibrated reference values. When discrepancies are detected, the system adjusts the measurements using stored calibration data, providing continuous feedback correction to maintain measurement precision throughout the vehicle's operation
2Device complexity
If a single inclination threshold is used for engine cutoff, then the control logic is simplified, but the system cannot differentiate between stable and unstable vehicle positions
Solution Approach 1:
The system segments the inclination threshold into multiple levels: a first threshold for initiating verification and a second higher threshold for triggering engine cutoff. This segmentation allows the system to differentiate between temporary unstable positions and genuine falls, improving detection accuracy while maintaining relatively simple control logic
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 ensures precise engine cutoff only when necessary, reducing accidental shutdowns and enhancing safety by differentiating between stable and unstable vehicle positions, thus preventing accidents.
Implementation Method 1
an electronic control unit which contains a MEMS (Micro Electro Mechanical System) type accelerometer
Implementation Method 2
the inclination angle of the vehicle... with respect to a vertical direction defined by Earth's gravity
Data Source
AI summary
The invention relates to a method of deactivating a cut-off function of an engine (10) of an engine-driven two-wheeled vehicle (1), said vehicle (1) comprising an electronic control unit (11) comprising an inclination sensor (111) configured to measure the lateral inclination angle (θ) of the vehicle (1) and to compare the calculated inclination angle (θ) with the second inclination threshold (θ2) and send a signal to stop the engine (10) if the calculated inclination angle (θ) is greater than the second inclination threshold (θ1), said method comprising the steps of:activating (E1) the electronic control unit (11) by an action of a user,receiving (E2) the speed of the vehicle (1),if the received speed is zero, calculating (E4) the inclination angle (θ) of the vehicle (1),if the calculated inclination angle (θ) is greater than the first inclination threshold (θ1), the electronic control unit (11) deactivates (E8**) the cut-off function of the engine (10).