BEV Acceleration Control Using Virtual Vehicle Models
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Solution Overview
Problem
Battery electric vehicles (BEVs) are limited in their ability to reproduce the acceleration characteristics of virtual vehicles with higher acceleration capabilities, leading to a gap in replicating the desired driving experience, and increasing the vehicle's cost to enhance this capability.
Innovation Solution
A battery electric vehicle system that includes a processing circuit to calculate and adjust virtual acceleration using a coefficient based on the vehicle's capabilities, allowing it to simulate the acceleration of selected virtual vehicles within its limits, using an electric motor and a database of vehicle models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the acceleration capability of the battery electric vehicle is increased to realize the acceleration characteristic of a virtual vehicle, then the sense of acceleration of the virtual vehicle can be reproduced, but the cost of the battery electric vehicle is unnecessarily increased
Solution Approach 1:
The patent creates virtual vehicle models that replicate the acceleration characteristics of different vehicle types (sports cars, sedans, SUVs) through software simulation rather than physical modification. The processing circuit calculates virtual acceleration based on selected vehicle models and controls the electric motor to reproduce these characteristics, allowing the BEV to copy the driving feel of various vehicles without requiring actual hardware changes or increased acceleration capability.
Solution Approach 2:
The patent changes the parameter of acceleration characteristic from a fixed physical property to a variable software-controlled parameter. By storing multiple vehicle models with different acceleration characteristics in a database and selecting among them based on driver preference, the system allows dynamic adjustment of acceleration behavior through parameter selection rather than physical modification, eliminating the need to increase the vehicle's actual acceleration capability.
2Adaptability or versatility
If the battery electric vehicle uses a vehicle model with acceleration characteristic exceeding its capability, then diverse driving experiences can be offered, but the acceleration characteristic cannot be realized as it is
Solution Approach 1:
The patent applies partial action by implementing acceleration characteristics that are partially adjusted to match the BEV's actual capabilities. When a virtual vehicle model with higher acceleration capability is selected, the system scales the acceleration request to what the BEV can actually deliver, while still preserving the essential driving character and feel of the selected vehicle type. This allows the system to offer diverse driving experiences without promising or attempting to deliver unrealistic performance.
3Ease of manufacture
If the battery electric vehicle reproduces the sense of acceleration of virtual vehicles within its capability limits, then cost increases are avoided, but the acceleration characteristic of high-performance virtual vehicles cannot be fully realized
Solution Approach 1:
The patent creates a universal virtual vehicle model database that can represent multiple vehicle types (sports cars, sedans, SUVs) with different acceleration characteristics within a single BEV system. The processing circuit and control system are designed to handle various vehicle models through software configuration rather than hardware modification, allowing one BEV to universally replicate the driving characteristics of many different vehicle types without requiring physical changes or increased acceleration capability for each model.
Data Source
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AI summary
A battery electric vehicle (100) includes an electric motor (2), a driving operation member (22, 24), a storage device (103) configured to store a database, and a processing circuit (102). The database is configured to manage a plurality of vehicle models obtained by modeling a plurality of virtual vehicles having different acceleration characteristics in response to a driving operation of a driver. The processing circuit (102) is configured to read out a target vehicle model corresponding to a target virtual vehicle selected by the driver from the database and to calculate a virtual acceleration of the target virtual vehicle using the target vehicle model. The processing circuit (102) is configured to calculate an adjusted virtual acceleration by multiplying the virtual acceleration by a coefficient of 1 or less according to the acceleration characteristic of the target virtual vehicle and to control the electric motor (2) such that an acceleration of the battery electric vehicle (100) is the adjusted virtual acceleration.