EV Virtual Gear Shifting With ICE-Like Sound and Vibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electric vehicles (EVs) lack the emotional driving experiences, such as shift feeling and sound, typically associated with internal combustion engine (ICE) vehicles, leading to a less engaging driving experience for drivers who desire the sensations provided by mechanical elements like an ICE and multi-stage transmission.
Innovation Solution
A method is implemented in EVs to generate a virtual shift feeling by determining a virtual gear shifting type and magnitude based on vehicle driving information, using a controller to produce virtual vibration and sound effects that simulate the experience of an ICE vehicle, including adjusting sound volume and vibration amplitude according to engine speed, gear shifting intervention torque, and gear shifting progress rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a motor replaces an internal combustion engine in an electric vehicle, then ride comfort is improved due to reduced vibrations, but driving emotional experience deteriorates due to lack of shift feeling and engine sound
Solution Approach 1:
The patent generates virtual engine sound and vibration signals that copy the acoustic and tactile characteristics of internal combustion engine vehicles. The controller synthesizes engine noise based on virtual engine speed and transmission state, and generates vibration signals that simulate gear shifting sensations, allowing EV drivers to experience emotional driving elements without physical engine components.
Solution Approach 2:
The patent replaces the mechanical engine and transmission system with an electronic control system that generates virtual sound and vibration effects. Instead of using physical mechanical elements to produce engine noise and shift feelings, the system uses electronic signal generation and playback through speakers and vibration motors to simulate these mechanical sensations.
2Ease of operation
If gear shifting is eliminated in electric vehicles using a fixed gear ratio reducer, then drivability smoothness is improved, but driving engagement deteriorates due to lack of shift sensation
Solution Approach 1:
The patent copies the sensory experience of gear shifting by generating virtual sound and vibration signals that mimic the acoustic and tactile characteristics of traditional gear changes. The controller determines virtual gear shifting events based on vehicle speed and accelerator input, then produces corresponding shift sensation signals through the audio and vibration systems, recreating the engagement of mechanical gear changes.
Solution Approach 2:
The patent implements periodic virtual gear shifting sensations at appropriate intervals during vehicle operation. The controller monitors driving conditions and triggers virtual shift events periodically based on virtual engine speed ranges and accelerator pedal position, creating rhythmic engagement patterns similar to conventional automatic transmissions that enhance driving interest without disrupting smooth operation.
Data Source
AI summary
A method of implementing characteristics of an ICE vehicle in an EV, and configured for implementing a feeling of operation of a driving system and a feeling of driving of an ICE vehicle in an electric vehicle includes determining a virtual gear shifting type and starting virtual gear shifting, determining magnitude of a virtual effect while the virtual gear shifting is performed, determining an amount of correction of the magnitude of the virtual effect based on the virtual gear shifting type and state information related to the virtual gear shifting while the virtual gear shifting is performed, correcting the magnitude of the virtual effect by the amount of correction of the magnitude of the virtual effect while the virtual gear shifting is performed, and controlling an operation of a virtual effect generation device according to a virtual effect signal including the corrected magnitude of the virtual effect.