EV Motor Control Mode Selection for Predictable Vehicle Startup
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Solution Overview
Problem
Drivers of battery electric vehicles experience discomfort due to unpredictable control modes at startup, which can differ between driving like a manual transmission (MT) vehicle and a normal electric vehicle, leading to a troublesome transition.
Innovation Solution
A battery electric vehicle equipped with an accelerator pedal, shifter, mode selection device, and control device that allows selective switching between MT and EV modes, with automatic mode selection at startup to ensure a consistent driving experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the control mode at startup is left undetermined to allow driver selection, then the driver can selectively enjoy both MT-like and normal EV driving experiences, but the driver feels troublesome due to unpredictable control modes at startup
Solution Approach 1:
The control device determines a default control mode in advance before the vehicle is started. This preliminary determination ensures that when the vehicle starts, the control mode is already established, eliminating the troublesomeness of unpredictable modes while still allowing driver selection through the mode selection device for subsequent mode switching.
2Adaptability or versatility
If the control mode switches between MT-like and normal EV modes, then the driver can enjoy diverse driving experiences, but the vehicle operation becomes complex and troublesome
Solution Approach 1:
The control device is designed to perform multiple functions: it determines the default control mode, responds to mode selection device inputs, and switches between MT-like and normal EV modes. This multi-functionality is managed through a unified control architecture that simplifies the overall system while maintaining the ability to provide diverse driving experiences.
Data Source
AI summary
Battery electric vehicle includes an accelerator pedal, a shifter, a mode selection device, and a control device. When the electric motor is controlled in EV mode, the control device changes the output of the electric motor in accordance with the operation of the accelerator pedal regardless of the operation position of the shifter, and when the electric motor is controlled in MT mode, the control device changes 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. When battery electric vehicle is activated, the mode selection device automatically selects a particular control mode, preferably an EV mode, between EV mode and MT mode.