Truck Engine Noise Shield Patch for Thermal Management
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Solution Overview
Problem
Truck engines face increased noise emissions due to higher injection pressures, which existing noise shields fail to adequately address without compromising engine cooling.
Innovation Solution
An engine arrangement featuring a noise shield patch that covers up to 75% of the engine's circumferential section, predominantly beneath the casing, with a minimal air gap to effectively reduce noise emissions without impacting thermal management, using a combination of noise-absorbing materials and flexible connectors to minimize vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a noise shield covers a large circumferential section of the engine casing, then noise abatement is improved, but engine cooling is deteriorated
Solution Approach 1:
The noise shield is applied selectively to specific circumferential sections of the engine casing rather than covering the entire surface. The shield covers not more than 75% of the circumferential section, with priority given to areas with high noise emission such as beneath the engine transmission and near the flywheel housing. This localized application reduces noise effectively while leaving sufficient exposed casing area for thermal dissipation.
Solution Approach 2:
Instead of applying the noise shield to the complete circumferential section (100%), the invention uses partial coverage of not more than 75% of the circumferential section. This partial action is sufficient to achieve the required noise reduction level while avoiding the negative thermal effects of complete coverage. The shield is positioned to cover the most critical noise-generating areas.
2Object-affected harmful factors
If the noise shield patch is arranged close to the casing, then noise abatement is improved, but manufacturing precision requirements increase
Solution Approach 1:
The noise shield is designed as a modular patch that can be applied to specific sections of the engine casing. The patch includes a perimeter that defines a circumferential section, allowing for standardized manufacturing and installation. This segmentation enables consistent spacing and positioning without requiring high-precision custom fabrication for each application.
Solution Approach 2:
The invention specifies that the distance between the noise shield patch and the casing should be equal to or less than 30 mm, with a preference for not more than 10 mm. This parameter range balances noise abatement effectiveness with manufacturing feasibility. The specified distance tolerance provides a practical target for manufacturing and installation while ensuring adequate noise reduction performance.
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 provides superior noise abatement with minimal impact on engine cooling, effectively reducing noise emissions by up to 1 ± 0.5 dB(A) while accommodating high injection pressures and advanced emission standards like Euro 5 and Euro 6.
Implementation Method 1
a noise shield patch is arranged at a circumferential section of the casing overlaying not more than 75% of the circumferential section
Implementation Method 2
noise shields provide a thermal insulation which may require additional cooling of the engine
Data Source
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AI summary
The invention relates to an engine arrangement (10) for a vehicle (100), particularly a commercial vehicle, particularly a truck, comprising subsequently arranged and encompassed in a casing (90) an engine block (60), an engine transmission (52) and a flywheel (50), wherein a noise shield patch (20) is arranged at a circumferential section (30, 32) of the casing (90) corresponding to the location of the flywheel (50) and/or the engine transmission (52) overlaying not more than 75% of the circumferential section (30, 32) and wherein the patch (20) is arranged predominantly beneath the casing (90).