Single Remote Control for E-Bike Torque and Gear Ratio Shifting
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Solution Overview
Problem
Existing drive systems for light electric vehicles require two separate remote controls for controlling the motor torque and transmission ratio, which are difficult to use and necessitate two-handed operation with complex button interactions.
Innovation Solution
A single remote control with an actuator that can switch between operating states to control either the assist motor for torque output or the control motor for transmission ratio, allowing one-handed operation and simplified control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two separate remote controls are used to control the assist motor and control motor, then each motor function can be controlled independently, but the device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent combines two separate remote controls into a single integrated remote control unit. This single remote control includes a control unit with processing circuitry that can selectively control either the assist motor or the control motor based on the current operating mode, thereby reducing device complexity while maintaining ease of operation through unified control
Solution Approach 2:
The single remote control is designed with multi-functionality to control both the assist motor and control motor. The control unit includes a plurality of output signals that can be selectively activated depending on the operating mode, allowing one remote control to perform multiple control functions that previously required two separate devices
2Adaptability or versatility
If two separate remote controls are provided on the handle bar, then both motors can be controlled during driving, but the remote control spatial requirements increase and installation becomes more complex
Solution Approach 1:
The patent merges two separate remote controls into one compact unit that mounts on the handle bar in a single location. This integration significantly reduces the spatial requirements on the handle bar while maintaining the versatility to control both motors through selective activation of different output signals from the control unit
3Ease of operation
If multibutton interactions are required to activate control functions, then precise control is achieved, but the ease of operation deteriorates and simultaneous control is not allowed
Solution Approach 1:
The control unit dynamically adapts its control signals based on the current operating mode. The processing circuitry selectively activates different output signals depending on whether the system is in a mode where the assist motor should be controlled or where the control motor should be controlled, allowing simple single-button operations to achieve precise control without requiring complex multibutton interactions
Data Source
AI summary
A drive system and remote control for a light electric vehicle. The drive system includes a power unit, a main gearing connected to the power unit and a remote control connect to the power unit. The power unit includes an assist motor arranged to provide torque output to a torsion shaft of the light electric vehicle, and a control motor arranged to adjust transmission ration of the main gearing. The remote control further includes an operating switch arranged to switch the remote control between a first and a second operating state for controlling the assist motor and control motor, respectively.