Vehicle Air Supply Conduit for Authentic Engine Noise Transmission
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Solution Overview
Problem
Existing systems for active noise suppression and sound transmission in vehicles, particularly with turbocharged internal combustion engines, fail to accurately transmit engine noise to the driver, leading to a discrepancy between the noise perceived inside and outside the vehicle, which affects driver acceptance and authenticity.
Innovation Solution
A vehicle air supply system with a pipe section connected to a sound introduction unit, which introduces sound into the pipe section and is acoustically coupled to both the passenger compartment and the environment, using the pipe section as a resonance body to radiate sound in a similar manner inside and outside the vehicle, with control mechanisms for signal modification based on engine components and driver requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a turbocharger is used to smooth pressure pulsations in the intake tract, then engine performance and efficiency are improved, but the authenticity of engine noise perceived by the driver deteriorates due to insufficient pressure pulsations for natural resonance
Solution Approach 1:
A sound introduction unit is introduced as an intermediary device that generates artificial pressure pulsations and transmits them to the pipe section. This mediator compensates for the loss of natural engine noise caused by the turbocharger's smoothing effect, allowing the driver to perceive authentic engine noise without compromising engine performance.
Solution Approach 2:
The sound introduction unit generates mechanical vibrations in the form of pressure pulsations that are transmitted through the pipe section. These vibrations create acoustic resonance that reproduces authentic engine noise characteristics, enabling the driver to hear realistic engine sounds despite the turbocharger's dampening effect.
2Loss of information
If existing sound transmission devices are used, then some noise transmission is achieved, but they fail to transmit noise both inside and outside the passenger compartment simultaneously
Solution Approach 1:
The pipe section is designed to serve multiple functions: it acts as both an air supply conduit and an acoustic transmission path. By acoustically coupling the pipe section to both the passenger compartment interior and the external environment, the system simultaneously transmits engine noise inside and outside the vehicle, achieving universal noise transmission capability.
3Loss of information
If the pipe section is used as a resonance body for sound transmission, then authentic engine noise is transmitted to the driver, but the structural complexity of the air supply system increases
Solution Approach 1:
The existing pipe section of the air supply system is repurposed to serve dual functions: air supply and acoustic resonance. By acoustically coupling this existing structure to both the passenger compartment and external environment, the system achieves authentic noise transmission without adding separate dedicated resonance structures, thereby minimizing increased complexity.
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
This solution ensures the driver experiences authentic engine noise with minimal volume discrepancy between inside and outside the vehicle, enhancing driver acceptance and providing clear feedback on engine load status, while also influencing noise emissions to improve passive safety.
Implementation Method 1
the pipe section (4) is acoustically coupled to the environment and to the passenger compartment (5) in such a way that the sound introduced into the pipe section (4) by the sound introduction unit (7) can be coupled and/or radiated both into the environment and into the passenger compartment (5)
Data Source
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AI summary
Vehicle with an air supply line (1) which supplies fresh air from the environment via an opening (2) to supply air to a drive and/or storage unit, in particular an engine (3), wherein the air supply line (1) comprises a pipe section (4) which is attached in the area of a passenger compartment housing (6) which at least partially surrounds a passenger compartment (5), wherein the pipe section (4) is operatively connected to a sound introduction unit (7) which introduces sound at least temporarily into the pipe section (4), wherein the sound introduction unit (7) is connected to a transmission means (8) and the sound introduction unit (7) can be controlled and/or excited by signals via the transmission means (8), wherein the pipe section (4) is acoustically coupled to the environment and to the passenger compartment (5) in such a way that the sound introduced into the pipe section (4) by the sound introduction unit (7) couples into and/or radiates to the environment and into the passenger compartment (5).