BEV Shifter-Controlled Torque Mapping for Manual-Like Driving
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Solution Overview
Problem
Existing battery electric vehicles (BEVs) lack the ability to provide drivers with the driving experience and sense of achievement typically associated with manual transmission (MT) vehicles, as the simulated torque characteristics are not achieved through the driver's own actions.
Innovation Solution
A battery electric vehicle equipped with an accelerator pedal, shifter, data management device, and motor control system that allows for standard and special vehicle characteristic data, where special data is unlocked upon satisfying predetermined driver actions, simulating MT vehicle operations and providing a sense of achievement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If simulated torque characteristics are provided through control systems, then driving experience of MT vehicle is improved, but driver's sense of achievement is reduced because it cannot be obtained through driver's own action
Solution Approach 1:
The system dynamically changes torque characteristics based on shifter operations. When the driver operates the shifter, the control system detects this input and adjusts the motor torque output accordingly, creating a dynamic driving experience that responds to driver actions rather than providing static simulated characteristics
Solution Approach 2:
The control system implements feedback by detecting shifter operations and adjusting torque characteristics in response. The system monitors driver inputs through the shifter and provides corresponding torque adjustments, creating a closed-loop system where driver actions directly influence vehicle behavior and generate sense of achievement
2Adaptability or versatility
If multiple torque characteristics are provided through control settings, then variety of driving feeling is improved, but device complexity is increased
Solution Approach 1:
The existing shifter mechanism is given a dual function: its primary function for gear selection and an additional function for selecting torque characteristics. This allows the system to provide multiple driving feelings without adding dedicated hardware for each torque mode, reducing overall device complexity
Solution Approach 2:
The system merges the shifter operation with torque characteristic selection. By combining these functions into a single input mechanism, the patent avoids the complexity of separate control systems for gear selection and torque management, achieving multiple driving feelings through integrated control
Data Source
AI summary
Battery electric vehicle includes an accelerator pedal, a shifter, a data management device that manages vehicle characteristic data, and a motor control device that controls an electric motor according to the vehicle characteristic data. The vehicle characteristic data is data configured to change the output characteristic of the electric motor with respect to the operation of the accelerator pedal in accordance with the operation position of the shifter. The vehicle characteristic data includes standard vehicle characteristic data and locked special vehicle characteristic data. The data management device is configured to unlock the special vehicle characteristic data in response to the unlocking condition requiring the predetermined action of the driver being satisfied.