EV Motor Torque Control With Manual Shift Simulation
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Solution Overview
Problem
Existing electric vehicles with electric motors as power sources lack precise torque control mechanisms, limiting driver operability and simulation of manual transmission gear shift operations.
Innovation Solution
Incorporating a torque operation device and a control system that allows drivers to adjust motor torque through both an accelerator operation device and a torque operation device, with modes for manual gear shift and automatic operation, enhancing precision and simulation of manual transmission feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only an accelerator operation device is used to control motor torque, then the device complexity is reduced, but the torque control precision and driver operability deteriorate
Solution Approach 1:
The torque control function is segmented into two independent operation devices: an accelerator operation device for basic torque control and a torque operation device for precise torque adjustment. This segmentation allows each device to specialize in specific control aspects, improving overall torque control precision without requiring a single complex device to handle all control functions
Solution Approach 2:
The control device is designed to universally process input signals from multiple operation devices (accelerator and torque operation devices). The control device integrates signals from both devices to comprehensively determine motor torque output, making the control system multi-functional and adaptable to different driving scenarios
2Ease of operation
If a torque operation device is added to enable precise torque adjustment, then the driver operability is improved, but the device complexity increases
Solution Approach 1:
The control device merges the control functions of multiple operation devices into a single integrated processing unit. By combining the accelerator operation device and torque operation device inputs within one control device, the system achieves precise torque control without proportionally increasing overall device complexity, as the control device handles multiple functions centrally
3Adaptability or versatility
If manual gear shift mode with dummy operation members is implemented, then the simulation of manual transmission feel is improved, but the ease of operation deteriorates due to additional operations required
Solution Approach 1:
The system dynamically switches between different operation modes (manual gear shift mode and automatic mode) based on driver selection. In manual gear shift mode, the relationship between accelerator operation and motor torque is switched according to dummy gear shift operation, providing manual transmission simulation. In automatic mode, the system automatically adjusts torque based on accelerator input. This dynamic adaptability allows the system to provide specialized driving experiences when needed while maintaining ease of operation as the default
Data Source
AI summary
The present disclosure relates to an electric vehicle having an electric motor as a driving source. The electric vehicle comprises an accelerator operation device, a control device that controls the electric motor, and a torque operation device configured to receive operation by a driver of the electric vehicle. The control device acquires an operation amount of the torque operation device, and changes torque of the electric motor in accordance with the operation amount of the torque operation device.