EV Torque Control With Manual-Shift Driving Feel
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Solution Overview
Problem
Electric vehicles lack the driving feel of conventional vehicles with manual transmissions due to differences in torque characteristics, leading to discomfort for drivers accustomed to manual transmission vehicles, as existing pseudo-shift techniques cannot replicate the driver's voluntary speed change operations effectively.
Innovation Solution
An electric vehicle equipped with an accelerator pedal, pseudo-clutch pedal, pseudo-gearshift, and a controller that simulates the torque characteristics of a manual transmission vehicle by allowing the driver to select between two modes: one that mimics the torque response delay of a manual transmission vehicle and another for normal electric vehicle operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the electric motor torque responds linearly and quickly to accelerator opening changes, then the electric vehicle has high torque response, but this gives discomfort to drivers accustomed to manual transmission vehicles who expect torque response delay
Solution Approach 1:
The patent applies dynamics by making the torque response characteristic adjustable between two modes: a first mode that simulates the delayed torque response of manual transmission vehicles, and a second mode that provides the natural quick response of electric motors. This dynamic switching allows the system to adapt to different driver preferences and conditions, resolving the contradiction between high torque response speed and driving comfort.
Solution Approach 2:
The patent changes the torque response parameter by switching between two distinct torque characteristics. In the first mode, the torque response is deliberately delayed to match manual transmission behavior, while in the second mode, the torque responds quickly and linearly to accelerator input. This parameter change enables the system to satisfy both types of drivers.
2Adaptability or versatility
If pseudo-shift control is implemented automatically based on vehicle speed and accelerator opening, then the electric vehicle can simulate gear changes, but this cannot replicate the driver's voluntary speed change operations and may cause discomfort
Solution Approach 1:
The patent applies self-service by providing the driver with direct control over the pseudo-gearshift and pseudo-clutch pedal operations. Instead of the system automatically determining when to simulate gear changes, the driver themselves operates the pseudo-gearshift lever and pseudo-clutch pedal to initiate torque variation control, thereby replicating the voluntary speed change operations of manual transmission vehicles.
3Ease of operation
If the electric motor torque is controlled to simulate manual transmission characteristics, then the driving feeling resembles an MT vehicle, but this reduces the natural torque response advantage of electric motors
Solution Approach 1:
The patent resolves this contradiction by making the torque response dynamic and switchable between two modes. In the first mode, the torque response is deliberately delayed to match manual transmission behavior, providing MT-like driving experience. In the second mode, the torque responds quickly and linearly to accelerator input, preserving the natural advantage of electric motors. The driver can choose the appropriate mode based on their preference.
Data Source
AI summary
The electric vehicle according to the present disclosure is configured to be able to select a traveling mode between an MT mode in which an electric motor is controlled with torque characteristics like an MT vehicle having a manual transmission and an internal combustion engine, and an EV mode in which the electric motor is controlled with normal torque characteristics. The controller of the electric vehicle controls the electric motor in the MT mode such that responsiveness of the motor torque with respect to a change in the operation amount of the accelerator pedal is lower than in the EV mode.