Vehicle Panel Sound Amplification for Emissions-Limited Driver Feedback
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Solution Overview
Problem
Modern vehicles, particularly sports cars, experience a reduction in acoustic vibrations due to emissions limitations, leading to a diminished acoustic performance that affects the vehicle's sportiness and driver feedback.
Innovation Solution
An apparatus comprising a processor, amplifier, and transducer system that simulates acoustic performance by generating acoustic vibrations based on driving conditions, using prestored electrical inputs or live acoustic signals, and emitting them through structural panels within or surrounding the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If emissions limitations are imposed on internal combustion engines, then environmental compliance is improved, but acoustic vibrations generated by the drive system are reduced
Solution Approach 1:
The patent creates artificial copies of engine acoustic vibrations using transducers mounted on vehicle panels. Instead of relying on actual combustion-generated vibrations, the system generates synthetic vibration signals that replicate the characteristic sounds of engine operation, exhaust flow, and driving dynamics across different operating conditions.
Solution Approach 2:
The patent replaces the mechanical vibration generation system (combustion engine) with an electro-mechanical system (transducers driven by electronic control). The transducers convert electrical signals into mechanical vibrations, substituting the natural combustion process with an electronically controlled vibration generation mechanism.
2Object-affected harmful factors
If combustion reactions are reduced to meet emissions standards, then environmental performance is improved, but acoustic feedback to the driver is reduced
Solution Approach 1:
The patent implements an active feedback system where transducers generate vibrations that provide the driver with tactile and auditory feedback about vehicle operating conditions. The system monitors driving parameters and generates corresponding vibration patterns that inform the driver about engine performance, gear changes, and driving dynamics, compensating for the loss of natural acoustic feedback.
Solution Approach 2:
The system creates artificial copies of the acoustic feedback that would naturally occur during combustion. By analyzing driving conditions and generating corresponding vibration patterns, the system reproduces the informational content of natural engine sounds, allowing the driver to receive the same performance information without actual combustion vibrations.
3Object-affected harmful factors
If the frequency and quality of acoustic vibrations are reduced, then emissions compliance is improved, but vehicle sportiness character is reduced
Solution Approach 1:
The patent creates a dynamic vibration generation system that adapts to changing driving conditions. The transducers adjust their vibration frequency, amplitude, and pattern in real-time based on engine RPM, vehicle speed, acceleration, and gear position, maintaining the characteristic sporty feel across the entire operating range rather than being static.
Solution Approach 2:
The system dynamically changes multiple vibration parameters including frequency, amplitude, waveform shape, and spatial distribution across different panels. By varying these parameters according to driving conditions, the system recreates the evolving acoustic character of a sporty vehicle during acceleration, cruising, and deceleration phases.
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
Enhances the acoustic performance of vehicles, providing desirable sound characteristics and driver feedback, while maintaining operational efficiency and compliance with emissions regulations.
Implementation Method 1
a transducer configured to generate acoustic vibrations from electrical signals received from the amplifier
Data Source
AI summary
An apparatus for simulating the acoustic performance of an automotive vehicle, the apparatus comprising: a processor configured to select an electrical input to be provided to the amplifier in dependence on one or more driving conditions for the vehicle, the electrical input indicating a desired acoustic output for a vehicle and being selected from a plurality of prestored electrical inputs; an amplifier configured to receive the electrical input from the processor and to generate amplified electrical signals of the acoustic output from the electrical input; a transducer configured to generate acoustic vibrations from electrical signals received from the amplifier; and a structural panel configured for placement on the body of the vehicle, wherein the transducer is mounted to the panel such that acoustic vibrations generated by the transducer are emitted from the panel to an environment within or surrounding the vehicle.