EV Torque Control With Pseudo Clutch and Shift Modes
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Solution Overview
Problem
Electric vehicles lack the driving experience of manual transmission vehicles due to the absence of a transmission system, and simulating manual transmission operations can be uncomfortable for drivers accustomed to internal combustion engine vehicles, especially when performing clutch and gearshift operations.
Innovation Solution
An electric vehicle equipped with a pseudo-clutch pedal and pseudo-gearshift, along with a controller that simulates the torque characteristics of a manual transmission vehicle, allowing drivers to select operation modes that either require or eliminate clutch and gearshift operations, thereby replicating the driving experience of a manual transmission vehicle without the associated difficulties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pseudo-clutch pedal and pseudo-gearshift operations are implemented to simulate manual transmission, then driving experience like MT vehicle is improved, but operation complexity and difficulty increase
Solution Approach 1:
The system dynamically switches between manual operation mode (first operation mode) and automatic operation mode (second operation mode) based on driver preference. In the first operation mode, the pseudo-clutch pedal and pseudo-gearshift are actively used to simulate MT vehicle operations. In the second operation mode, these operations are automatically controlled by the controller, eliminating the need for manual clutch and gearshift operations while maintaining the simulated driving experience.
Solution Approach 2:
The operation mode selector changes the operational parameters of the pseudo-clutch pedal and pseudo-gearshift. When switching from the first operation mode to the second operation mode, the system transitions from requiring manual intervention to automatic control, effectively changing the degree of driver involvement and operational complexity.
2Ease of operation
If torque variation control is performed automatically without driver intervention, then driving comfort is improved, but driving engagement and pleasure are reduced
Solution Approach 1:
The system provides dynamic control over the level of automation through the operation mode selector. Drivers can choose the first operation mode to actively engage with pseudo-clutch and pseudo-gearshift operations for driving pleasure and engagement. Alternatively, drivers can select the second operation mode for automatic torque variation control when prioritizing driving comfort and convenience.
3Adaptability or versatility
If manual transmission operations are simulated in electric vehicle, then driving familiarity for MT drivers is improved, but operation complexity increases
Solution Approach 1:
The system uses pseudo-clutch pedal and pseudo-gearshift as simplified copies of actual manual transmission components. These pseudo-devices replicate the essential operations and feel of MT vehicles without requiring the full mechanical complexity of a real transmission system. The controller processes the input from these pseudo-devices to achieve the desired torque characteristics.
Solution Approach 2:
The patent replaces the mechanical transmission system with an electrical control system. Instead of using actual clutch and gearshift mechanisms, the system uses pseudo-clutch pedal and pseudo-gearshift inputs that are processed by the controller to simulate MT vehicle torque characteristics, thereby eliminating mechanical complexity while maintaining driving familiarity.
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.