Electronic Gear Shifting for Electric Motorcycle Torque Simulation
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Solution Overview
Problem
Electric motorcycles lack a gear-shifting function, which is essential for varying motor torque outputs, unlike traditional gear-shifting-type motorcycles, due to the absence of gear-shift mechanisms like a clutch and gearbox.
Innovation Solution
An electronic gear-shifting device is developed for electric motorcycles, comprising an electronic shift unit, an electronic clutch unit, a throttle position sensor, a vehicle controller, and a motor controller, which generate shift and clutch signals to simulate gear shifting by determining target gear positions and adjusting motor torque commands without adding physical gear-shifting mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If gear-shifting mechanisms (clutch, gearbox) are added to electric motorcycles, then the motorcycle can provide different motor torque outputs in different gear positions, but the device complexity and structural complexity increase significantly
Solution Approach 1:
The patent replaces the traditional mechanical gear-shifting system (clutch, gearbox) with an electronic control system. The electronic shift unit, electronic clutch unit, and controller work together to simulate gear-shifting operations through electronic signals, eliminating the need for complex mechanical components while achieving the same functional outcome of varying motor torque outputs across different gear positions.
Solution Approach 2:
The patent creates an electronic simulation of the gear-shifting function rather than implementing the actual mechanical gear-shifting mechanism. By copying the functional behavior of traditional gear-shifting motorcycles through electronic control and preset motor characteristic curves, the system achieves gear-shifting capabilities without replicating the complex mechanical structure.
2Adaptability or versatility
If traditional gear-shifting mechanisms are added to electric motorcycles, then the motorcycle can simulate gear-shifting operations, but the ease of manufacture decreases due to additional components
Solution Approach 1:
The patent substitutes mechanical gear-shifting components with electronic control units. The electronic shift unit, electronic clutch unit, and controller can be integrated into the existing electric motorcycle control architecture, simplifying the manufacturing process compared to assembling and calibrating complex mechanical gear-shifting mechanisms.
3Adaptability or versatility
If electronic control units are added to provide gear-shifting function, then the gear-shifting operation is simulated, but the device complexity increases
Solution Approach 1:
The patent merges the electronic shift unit, electronic clutch unit, and controller into an integrated electronic control system. These components work together as a unified gear-shifting control module, reducing the overall electronic control complexity compared to having separate, independent control systems for each function.
Data Source
AI summary
The present invention is an electronic gear-shifting device of an electric motorcycle for simulating gear shifting power output, including an electronic shift unit, an electronic clutch unit and a throttle position sensor, and correspondingly outputting a shift signal, a clutch signal and a throttle position signal according to the operation of the rider. A vehicle controller receives the shift signal, the clutch signal and the throttle position signal to determine a target gear position of the electric motorcycle. The vehicle controller looks up a motor torque command according to the target gear position table and outputs the motor torque command to a motor controller, so that the motor controller controls an electric motor of electric motorcycle. Therefore, the electric motorcycle simulates the power performance of a general motorcycle without adding a physical clutch, a gearbox and other shifting mechanisms.