EV Motor Control for Virtual Vehicle Acceleration Feel
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Solution Overview
Problem
Existing electric vehicles face limitations in replicating the acceleration characteristics of virtual vehicles that exceed their own capabilities, leading to an inability to reproduce the desired feel of acceleration, and increasing costs to enhance performance.
Innovation Solution
An electric vehicle system that includes a database of vehicle models, processing circuitry to calculate and correct virtual acceleration rates, and control the electric motor to simulate the acceleration feel of selected virtual vehicles by reshaping acceleration changes over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the acceleration capability of the electric vehicle is increased to realize the acceleration characteristic of a virtual vehicle, then the acceleration characteristic can be realized, but the cost of the electric vehicle increases unnecessarily
Solution Approach 1:
The patent creates virtual vehicle models that replicate the acceleration characteristics of different vehicle types (sports car, sedan, truck) through software simulation rather than physically modifying the electric vehicle. The processing circuitry calculates virtual acceleration rates based on selected vehicle models and controls the electric motor to reproduce the feel of acceleration corresponding to each virtual vehicle type, allowing one electric vehicle to simulate multiple acceleration characteristics without hardware changes.
Solution Approach 2:
The patent changes the control parameters of the electric motor based on the selected virtual vehicle model. The processing circuitry adjusts motor torque output and acceleration rate parameters dynamically to match the characteristics of the selected virtual vehicle, enabling the same physical vehicle to exhibit different acceleration behaviors corresponding to sports cars, sedans, or trucks without physical modifications.
2Device complexity
If the electric vehicle uses a single motor to drive all wheels, then the drive system is simplified, but the acceleration capability is limited compared to multi-motor configurations
Solution Approach 1:
The patent creates virtual representations of high-performance multi-motor vehicle systems through software models. These virtual vehicle models encode the acceleration characteristics of complex multi-motor configurations, allowing a simple single-motor electric vehicle to simulate the acceleration feel of sophisticated multi-motor systems without requiring the actual complex hardware.
Solution Approach 2:
The patent replaces the physical multi-motor mechanical system with a software-based virtual model. Instead of installing multiple motors to achieve high acceleration capability, the system uses processing circuitry to calculate and control motor output based on virtual vehicle models, substituting mechanical complexity with computational control to achieve equivalent acceleration characteristics.
Data Source
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AI summary
An electric vehicle (100) includes a storage device (103) storing a database, and processing circuitry (102). The processing circuitry (102) reads a target vehicle model corresponding to a target virtual vehicle selected by a driver from the database, and calculates a virtual acceleration rate of the target virtual vehicle by using the target vehicle model. When it is determined that the virtual acceleration rate exceeds a realizable acceleration rate of the electric vehicle (100) during an acceleration period of the electric vehicle (100) in which the accelerator pedal (22) is depressed, the processing circuitry (102) performs a correction process of correcting the virtual acceleration rate in such a manner as to reshape, according to an excess amount, changes over time in the virtual acceleration rate. The processing circuitry (102) controls the electric motor (2) in such a manner that an acceleration rate of the electric vehicle (100) becomes the corrected virtual acceleration rate.