EV Motor Torque Control With Pseudo Clutch and Gearshift
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Solution Overview
Problem
The driving experience in electric vehicles (EVs) differs significantly from that of manual transmission (MT) vehicles due to the absence of a transmission system, and existing methods to simulate MT vehicle torque characteristics fail to account for the driver's voluntary control, potentially causing discomfort, especially for MT vehicle enthusiasts.
Innovation Solution
An EV equipped with a pseudo-clutch pedal and pseudo-gearshift, along with a controller that simulates MT vehicle operations through multiple operation modes, allowing drivers to experience MT-like driving without the actual difficulties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pseudo-clutch pedal and pseudo-gearshift operations are simulated to provide MT vehicle driving feel, then driving experience is improved, but operation complexity increases
Solution Approach 1:
The patent creates virtual copies of clutch and gearshift operations through software simulation. The controller generates pseudo-clutch pedal operations and pseudo-gearshift operations that replicate MT vehicle behavior without physical hardware, providing authentic driving feel while maintaining EV simplicity
Solution Approach 2:
The patent replaces the mechanical transmission system with an electronic control system. Instead of physical clutch and gearshift mechanisms, the controller uses software algorithms to simulate their effects on motor torque, substituting mechanical complexity with electronic control
2Adaptability or versatility
If clutch operation is required to simulate MT vehicle driving, then driving authenticity is improved, but ease of operation deteriorates
Solution Approach 1:
The controller automatically generates and executes pseudo-clutch pedal operations without requiring actual driver input. The system serves itself by autonomously determining when clutch engagement/disengagement should occur based on simulated MT vehicle logic, eliminating the need for driver intervention while maintaining authentic driving feel
3Adaptability or versatility
If pseudo-gearshift operation is implemented to simulate MT vehicle, then driving feeling is improved, but device complexity increases
Solution Approach 1:
The patent creates virtual gearshift operations through software that replicates MT vehicle gear changing behavior. The controller simulates gear ratio changes by adjusting motor torque characteristics, providing authentic driving feeling without physical gearshift mechanisms
Solution Approach 2:
The controller serves multiple functions: it controls motor torque for propulsion, generates pseudo-clutch operations, simulates gearshift operations, and adapts to different driving conditions. This multi-functionality consolidates what would otherwise require separate physical systems into a single electronic control unit
Data Source
AI summary
The electric vehicle according to the present disclosure calculates motor torque using an MT vehicle model simulating an MT vehicle having a manual transmission and an internal combustion engine. In the first operation mode, an operation amount of a pseudo-clutch pedal and a shift position of a pseudo-gearshift are input to the MT vehicle model to reflect operation of the pseudo-clutch pedal and operation of the pseudo-gearshift in electric motor control. In the second operation mode where the operation of the pseudo-clutch pedal is not needed, an operation amount of a clutch pedal calculated by a driver model is input to the MT vehicle model instead of the operation amount of the pseudo-clutch pedal.