Motorcycle Gear Shift Detection Using a Single Hall Sensor
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Solution Overview
Problem
Existing motorcycle gear shift systems are costly, complex, and have long intervention times, providing a resistance feeling during gear shifts, which is unacceptable in racing conditions, and often require double sensors and elastic elements that increase maintenance costs and reduce reliability.
Innovation Solution
A system using a single Hall-effect sensor on the gearbox drum to detect gear shifts, generating voltage signals that are interpreted by the ECU to manage torque dynamics for quick and reliable gear changes, eliminating the need for additional sensors and elastic elements, and ensuring rapid, repeatable shifts even at low engine revolutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If double sensors and elastic elements are used to detect gear shifts, then gear shift detection accuracy is improved, but system cost and complexity increase
Solution Approach 1:
The patent extracts and eliminates the unnecessary elastic element from the gear lever assembly, keeping only the essential sensor component. This removes the problematic elastic element that caused delayed detection and resistance feeling, while maintaining gear shift detection functionality through the sensor alone.
Solution Approach 2:
The single sensor on the gearbox drum serves multiple functions: detecting gear shift initiation, determining shift direction (upshift/downshift), and providing feedback for torque dynamics control. This multi-functional approach replaces the need for separate sensors and elastic elements used in prior art.
2Stability of the object's composition
If elastic elements are used between gear lever and gearbox selector drum, then mechanical connection is improved, but intervention time increases and resistance feeling occurs
Solution Approach 1:
The patent removes the elastic element entirely from the system, eliminating the source of delayed response and resistance feeling. The direct mechanical connection between gear lever and gearbox selector drum is maintained without elastic intermediaries, enabling immediate response to rider input.
Solution Approach 2:
The patent replaces the mechanical elastic element-based detection system with an electronic sensor-based detection system. The Hall-effect sensor on the gearbox drum detects gear shift position electronically, eliminating the need for elastic mechanical elements and their associated delays.
3Ease of operation
If prior art quickshift systems are implemented, then gear shifting capability is provided, but maintenance cost increases due to sensor failures
Solution Approach 1:
The patent removes the redundant sensor from the gear lever assembly, reducing the total sensor count from two to one. This elimination of unnecessary components directly reduces potential failure points and maintenance requirements while preserving complete gear shifting functionality.
Solution Approach 2:
The patent discards the redundant sensor and elastic element components that were previously part of the system. By removing these components, the system achieves lower maintenance costs and higher reliability, as there are fewer parts that can fail or require replacement.
4Measurement precision
If prior art systems with multiple sensors are used, then gear shift verification is improved, but system cost increases
Solution Approach 1:
The single sensor on the gearbox drum performs multiple verification functions: detecting gear shift initiation, determining shift direction, and confirming shift completion. This multi-functional sensor replaces the need for multiple separate sensors, maintaining verification accuracy while reducing system cost.
Solution Approach 2:
The sensor provides continuous feedback to the ECU about gear shift status and direction. The ECU uses this feedback information to verify gear shift completion and control torque dynamics, achieving accurate verification with a single sensor through intelligent feedback processing.
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 system provides a cost-effective, reliable, and responsive gear shift experience with reduced maintenance needs, allowing quick shifts without resistance, enhancing control and safety in racing conditions.
Implementation Method 1
A system using a single Hall-effect sensor on the gearbox drum to detect gear shifts, generating voltage signals that are interpreted by the ECU
Data Source
AI summary
A method for quickly shifting the gear of an engine of a motorcycle having a gear assembly provided with a rotary member for selecting the gear, provides for detecting the position of such rotary member during the gear shift and with the gear engaged, identify the electrical signals detected by a special sensor functionally associated with such rotary member and relating to such position, detecting a predefined electrical signal value between the identified electrical signals and shifting the gear when such predefined signal value is achieved following an action of the rider on a gear lever. Furthermore, disclosed is the system for implementing such method.