EV Virtual Shift Control Using a Motor Disconnector
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Solution Overview
Problem
Electric vehicles without multi-stage transmissions lack the driving sensibility and excitement experienced in internal combustion engine vehicles, as they do not provide a shifting effect, leading to a less engaging driving experience for drivers.
Innovation Solution
An apparatus and method that generate a virtual shift effect in electric vehicles using a disconnector to simulate the engagement and disengagement of power transmission between the sub-driving wheels and the sub-wheel motor, creating a shift impact similar to that of a multi-stage transmission, along with optional virtual engine sounds and display feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a fixed gear ratio reducer is used instead of multi-stage transmission, then smooth drivability is achieved without shifting interruptions, but the driving excitement and shift effect are lost
Solution Approach 1:
The disconnector is periodically engaged and disengaged during vehicle operation to generate virtual shift effects. The controller determines virtual shift points based on driving information and controls the disconnector to create periodic impact sensations that simulate traditional shift effects, thereby restoring driving excitement while maintaining the smooth drivability of fixed gear ratio systems.
2Ease of operation
If a disconnector is engaged or disengaged to generate virtual shift effect, then driving excitement and shift effect are restored, but additional device complexity is introduced
Solution Approach 1:
The disconnector component serves dual functions: it can generate virtual shift effects to provide driving excitement, and it can also serve as a standard disconnection device for power transmission control. By making the disconnector multi-functional, the patent avoids adding separate components solely for virtual shift effects, thereby minimizing the increase in device complexity while still achieving the desired driving experience enhancement.
Data Source
AI summary
An apparatus and method of generating a virtual shift effect in an electric vehicle are provided. The apparatus for generating a virtual shift effect in an electric vehicle includes: a driving information detector configured to detect driving information of the electric vehicle; a controller configured to determine a virtual shift point based on the detected driving information and output a control signal for generating the virtual shift effect at the determined virtual shift point; and a disconnector configured to disengage power transmission between sub-driving wheels and sub-wheel motor, wherein the disconnector is engaged or disengaged according to the control signal output, and generates an impact occurring upon the engagement or disengagement of the disconnector as the virtual shift effect.