Electric Vehicle Accelerator Grip for Creep Speed Control
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Solution Overview
Problem
Conventional electric vehicle control systems require multiple switches for advancing and backing, making operation cumbersome, especially during parking, and do not efficiently simplify the switching process.
Innovation Solution
A control device with an accelerator mechanism that includes a spring-loaded accelerator grip allowing for smooth transition between normal and creep speed moving regions, enabling the electric vehicle to advance or back at predetermined speeds with minimal operator input, using a creep speed control section to manage throttle openings and motor instructions based on grip position and inclination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple switches are provided for setting backing mode and turning motor, then the vehicle can be controlled to advance and back, but the operation becomes cumbersome and difficult especially during parking
Solution Approach 1:
The patent combines multiple switch functions into a single integrated accelerator grip mechanism. The accelerator grip serves both as the mode setting switch (for selecting advance/backing modes) and as the motor control input, eliminating the need for separate backing switches and mode setting switches. This merging of functions directly reduces the number of operations required during parking maneuvers.
Solution Approach 2:
The accelerator grip is designed to perform multiple functions: it acts as a mode selection device (switching between advance and backing modes), a motor control input (regulating motor speed and direction), and a position indicator (through its angular position relative to the handlebar). This multi-functionality eliminates the need for multiple dedicated switches while maintaining full vehicle control capability.
2Device complexity
If a single backing switch with mode setting function is used, then the number of switches is reduced, but multiple operations are still required for backing and advance switching
Solution Approach 1:
The patent merges the mode setting function and motor control function into a single continuous operation of the accelerator grip. By integrating these functions, the system eliminates the need for separate switching operations and mode setting steps, allowing the rider to control both mode selection and motor activation through one continuous grip movement.
Solution Approach 2:
The accelerator grip provides continuous control throughout its angular range, allowing smooth transition between advance and backing modes without discrete switching steps. The grip's continuous rotational movement enables uninterrupted control of motor direction and speed, eliminating the need for separate switching operations and improving operational efficiency during parking maneuvers.
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
Simplifies the operation of advancing and backing by allowing the electric vehicle to move at predetermined speeds with minimal effort, facilitating easy parking and operation by reducing the need for multiple switches and enhancing operational efficiency.
Implementation Method 1
spring means that restores the throttle opening on the side of the minimum opening when the accelerator is not operated
Data Source
AI summary
In an electric vehicle, a throttle spring restores a throttle opening on the side of a minimum opening when the accelerator is not operated. A driving section drives a motor according to the throttle opening. The throttle spring pushes an accelerator grip to a creep speed reference opening so as to reduce the throttle opening. A creep speed control section supplies a motor driving instruction to the driving section so that the electric vehicle is advanced at minute vehicle speed. The electric vehicle can also be backed at predetermined minute vehicle speed when the throttle opening is smaller than the creep speed reference opening.