Fake Engine Sound Control for EV Speed Perception
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Solution Overview
Problem
Conventional fake engine sound control techniques in electric and hybrid vehicles often result in uncomfortable driving experiences for drivers, particularly when attempting to adjust vehicle speed, as they rely on increasing sound volume or warning messages, which can cause fear and reduce driving comfort.
Innovation Solution
A fake engine sound control device and method that utilize environment and vehicle speed information to generate a fake engine sound, adjusting its frequency and volume to subtly influence the driver's perception of vehicle speed, encouraging acceleration or deceleration without uncomfortable warnings, using a system comprising an environment information acquisition unit, vehicle speed acquisition unit, engine speed acquisition unit, fake engine sound generator, and controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional fake engine sound control increases sound volume or uses warning messages to adjust vehicle speed, then vehicle speed control is achieved, but driver comfort deteriorates due to fear and discomfort
Solution Approach 1:
The patent changes the parameters of the fake engine sound (frequency, volume, timbre) to subtly influence driver perception. Instead of using loud warnings, the system adjusts sound parameters to evoke a sense of speed, encouraging drivers to accelerate or decelerate naturally without discomfort or fear.
Solution Approach 2:
The fake engine sound acts as an intermediary between the vehicle's actual speed and the driver's perception. Rather than directly communicating speed information through warnings, the system uses sound as a mediator to indirectly guide the driver's speed adjustments through psychological influence.
2Reliability
If fake engine sound is used to alert drivers to speed limits, then safety improves, but driver comfort worsens due to uncomfortable warnings
Solution Approach 1:
The system changes sound parameters dynamically based on the situation. When approaching speed limits, it adjusts frequency and volume to create a psychological effect that encourages speed reduction, rather than using uncomfortable warning messages. This maintains safety while preserving driver comfort.
Solution Approach 2:
The patent converts the potential harm of uncomfortable warnings into a beneficial psychological influence. By using sound parameters that naturally evoke speed perception, the system turns what could be a distressing experience into a subtle, comfortable guidance mechanism that achieves safety goals without discomfort.
3Loss of information
If explicit warnings are used to control vehicle speed, then safety information is clearly communicated, but driving comfort deteriorates
Solution Approach 1:
The fake engine sound serves as an intermediary that communicates speed information indirectly through psychological influence. Rather than explicitly telling the driver to slow down or speed up, the sound mediates the communication by evoking speed perception, allowing information transfer without direct commands that compromise comfort.
Solution Approach 2:
The system uses parameter changes in sound characteristics to encode speed information. By varying frequency, volume, and timbre according to actual vehicle speed and target speed, the system communicates necessary information subtly through sound evolution, maintaining driver comfort while ensuring understanding.
Data Source
AI summary
A fake engine sound control device includes an environment information acquisition unit, a vehicle speed acquisition unit, an engine speed acquisition unit, a fake engine sound generator, and a fake engine sound controller. The environment information acquisition unit acquires environment information. The vehicle speed acquisition unit acquires vehicle speed information. The engine speed acquisition unit acquires rotation speed information. The fake engine sound generator generates a fake engine sound. The fake engine sound controller determines, based on the environment information and the vehicle speed information, whether leading to a target vehicle speed is required, the target vehicle speed being different from the vehicle speed indicated by the vehicle speed information, and controls, when leading to the target vehicle speed is required, the fake engine sound generator based on the target vehicle speed and the rotation speed information.