Vehicle Sound Generation Assembly for EV Acoustic Feedback
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Solution Overview
Problem
Electric motor vehicles with electric drive devices emit weak sounds associated with mechanical vibrations, leading to reduced driver awareness and enjoyment of the vehicle's performance.
Innovation Solution
The motor vehicle incorporates sensors to detect vibrational and electromagnetic responses, processing these signals to enhance acoustic feedback through pitch-shifting, allowing for the emission of sounds that emphasize the operating state of the electric motor, thereby increasing driver awareness and pleasure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If electric motor vehicles use electric drive devices, then energy efficiency is improved, but driver awareness and enjoyment of vehicle performance deteriorate due to weak emission sounds
Solution Approach 1:
The patent converts the harmful effect of weak and unpleasant motor sounds into a beneficial feature by processing these sounds through pitch-shifting technology. The originally undesirable low-frequency vibrations and noises are transformed into pleasant, high-frequency acoustic emissions that enhance driver awareness and enjoyment while maintaining the energy efficiency of electric drive devices
Solution Approach 2:
The patent applies parameter changes by modifying the frequency characteristics of motor sounds through pitch-shifting. The sound frequency is transformed from low-frequency ranges (undesirable) to high-frequency ranges (pleasant), thereby changing the perceptual quality of the sounds without altering the fundamental operation of the electric motor
2Use of energy by moving object
If electric motor vehicles use electric drive devices, then energy efficiency is improved, but driver pleasure and enjoyment of driving deteriorate due to lack of acoustic feedback
Solution Approach 1:
The patent transforms the harmful lack of acoustic feedback in electric vehicles into a beneficial feature by generating pleasant high-frequency sounds from the processed motor vibrations. This creates an enhanced auditory experience that increases driver pleasure and enjoyment while preserving the energy efficiency advantages of electric drive devices
Solution Approach 2:
The patent introduces acoustic feedback by capturing motor vibrations and emissions, processing them through pitch-shifting, and re-emitting them as pleasant sounds. This feedback loop provides the driver with audible information about motor operation, enhancing the driving experience and connection between driver and vehicle
3Loss of information
If sensors and processing systems are added to enhance acoustic feedback, then driver awareness is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a system where the same acoustic processing components serve multiple functions: capturing motor vibrations, processing signals through pitch-shifting, and emitting enhanced sounds. This multi-functional approach improves driver awareness while minimizing the increase in device complexity by avoiding redundant components
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively enhances driver engagement by transforming undesirable noise frequencies into pleasant acoustic sensations, improving the driver's perception of the vehicle's performance and overall driving experience.
Implementation Method 1
a transducer configured to detect a magnetic field variation associated with an operation of the electric motor
Implementation Method 2
an emitting device configured to emit an electric current signal as a function of the magnetic field variation
Implementation Method 3
a loudspeaker configured to emit a sound as a function of the electric current signal emitted by the emitting device
Data Source
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AI summary
A motor vehicle (1) comprises a body (5) defining a passenger compartment (6) of the motor vehicle (1), an axle with a motor (3) and/or at least one movable component, transduction means configured to detect one or more quantities associated with an operation of the motor (3) or of the movable component and to generate a first signal related to said quantities, and sound emitting means (17) configured to emit sound as a function of the first signal.