Silencer Muffling Medium Without Detachable Particles
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Solution Overview
Problem
Existing silencers for internal combustion engines, particularly turbo engines, face challenges in improving noise absorption properties while reducing complexity and costs, as they can emit particles that require additional filtration, leading to increased effort and pressure loss.
Innovation Solution
A silencer design featuring a muffling medium without detachable particles, which can withstand high temperatures and pressures, is used. This medium is placed outside the flow path, allowing the combustion gas to flow along its surface, reducing particle emission and pressure loss, and is realized in multiple layers for enhanced noise damping across a broad frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional muffling materials are used in the silencer, then noise absorption is achieved, but particles are emitted into the combustion gas requiring additional filtration
Solution Approach 1:
The patent applies this principle by using the combustion gas flow itself to prevent particle emission. The gas flow direction is utilized to keep particles away from the intake, converting the harmful particle emission into a beneficial self-cleaning effect where the flow pattern prevents contamination
Solution Approach 2:
The patent extracts the harmful particles from the system by positioning the silencer and muffling material such that particles are separated from the main combustion gas flow path, preventing them from entering the engine while maintaining noise absorption functionality
2Object-generated harmful factors
If additional filtration is added to capture particles, then particle pollution is reduced, but device complexity and pressure loss increase
Solution Approach 1:
The silencer design makes the system self-service by using the existing combustion gas flow to automatically prevent particle emission. No additional active filtration systems are needed - the flow pattern itself performs the particle separation function, reducing device complexity while maintaining effectiveness
3Object-generated harmful factors
If additional filtration is added to capture particles, then particle pollution is reduced, but pressure loss increases
Solution Approach 1:
The patent converts the harmful particle emission into a beneficial effect by using the gas flow pattern to prevent particle contamination. The same flow that could carry particles instead is utilized to keep particles away from the intake, eliminating the need for additional filtration that would cause pressure loss
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 reduces noise in the frequency range of 500 Hz to 10 kHz without the need for additional filtration, maintains mechanical stability, and can be used in various engine configurations, including turbocharged and non-turbocharged engines, while minimizing pressure loss and particle pollution.
Implementation Method 1
a silencer (118) comprising at least one muffling medium (36), which is in contact with the at least one flow path (32) at least partly inside the housing (24)
Data Source
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AI summary
The present invention relates to a silencer (118) of an intake system (10) of an internal combustion engine (12), in particular a turbo engine, in particular of a motor vehicle, and an intake system (10). The silencer (118) comprises a housing (24). The housing (24) having at least one inlet (26) for combustion gas, in particular combustion air, having at least one outlet (28) for the combustion gas and having at least one flow path (32) for the combustion gas from the at least one inlet (26) to the at least one outlet (28). The silencer (118) comprises at least one muffling medium 36, which is in contact with the at least one flow path (32) at least partly inside the housing (24). The at least one muffling medium (36) has no detachable particles, which can be emitted at least in or toward the at least one flow path (32).