Straddle Vehicle Motor Control for Forward-Reverse Regeneration
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Solution Overview
Problem
Existing straddle vehicles lack the ability to closely mimic the intended feeling of user operation, particularly in switching between forward and backward traveling modes, due to inadequate control over power running and regeneration processes.
Innovation Solution
A straddle vehicle equipped with an electric motor, battery, and processing circuitry that acquires vehicle and operation state information to switch between power running control and regeneration control, adjusting torque limits based on vehicle state and user operations, allowing for tailored control modes such as low-speed and normal traveling modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the vehicle uses a single regeneration control mode, then the control system is simple, but the user experience does not closely match the intended feeling during different operating conditions
Solution Approach 1:
The patent implements dynamic switching between first regeneration control and second regeneration control based on vehicle state information and operation information. The processing circuitry determines the appropriate control mode in real-time, adjusting the regeneration amount dynamically to match user intent during different operating conditions such as forward/backward traveling and slow-speed operations.
Solution Approach 2:
The patent changes the regeneration amount parameter based on different control modes. During first regeneration control, a first regeneration amount is applied, while during second regeneration control, a second regeneration amount (larger than the first) is applied. This parameter adjustment allows the system to provide appropriate regeneration feedback for different user operations without requiring complex hardware modifications.
2Use of energy by moving object
If the vehicle applies full regeneration torque in all conditions, then energy recovery is maximized, but the user feels unnatural control during slow-speed operations
Solution Approach 1:
The patent adjusts the regeneration amount parameter based on vehicle speed and operation type. During slow-speed traveling operations, the system limits the regeneration amount to a smaller value that provides natural-feeling control. During normal-speed operations, the system applies full regeneration torque to maximize energy recovery. This dynamic parameter adjustment resolves the contradiction between energy efficiency and operational naturalness.
3Ease of operation
If the vehicle switches control modes based on detailed vehicle and operation information, then the user experience is optimized, but the processing complexity increases
Solution Approach 1:
The processing circuitry acquires vehicle state information (including traveling direction and speed) and operation information from the operator, then uses this feedback to determine the appropriate regeneration control mode. The system continuously monitors these inputs and adjusts the regeneration amount accordingly, providing optimized user experience through intelligent feedback-based control without requiring complex additional hardware.
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 vehicle can closely replicate the intended user experience by adjusting power running and regeneration controls, enhancing the feeling of control and safety during forward and backward operations, while optimizing battery charging and discharging currents.
Implementation Method 1
an electric motor mounted on the vehicle body as a driving source and rotatable in positive and reverse directions
Implementation Method 2
a battery mounted on the vehicle body and configured to supply electric power to the electric motor
Implementation Method 3
switch between power running control and regeneration control based on the vehicle state information and the operation information
Data Source
AI summary
There are provided a straddle vehicle and a method for controlling a vehicle. the straddle vehicle includes: a vehicle body; an electric motor mounted on the vehicle body as a driving source and rotatable in positive and reverse directions; a battery mounted on the vehicle body and configured to supply electric power to the electric motor; and a processing circuitry configured to control the electric motor. The processing circuitry is configured to: acquire vehicle state information capable of determining whether a vehicle state of the straddle vehicle is a forward traveling state or a backward traveling state, and operation information capable of determining whether a user operation is a forward traveling operation or a backward traveling operation; and switch between power running control and regeneration control based on the vehicle state information and the operation information.