Conical Insert for Turbocharger Supply Duct Aerodynamics
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Solution Overview
Problem
Current turbocharger supply duct designs face challenges in maintaining optimal air flow due to restrictive engine compartment architectures, which lead to shorter ducts with multiple bends and strong diameter restrictions, making it difficult to achieve favorable aerodynamic characteristics and efficient manufacturing, while also seeking an economic gain.
Innovation Solution
A horn for the turbocharger supply duct featuring a conical inner duct created by an insert that extends in continuity with the tubular body, using fixing elements like gluing, welding, or screwing to ensure centering and sealing, allowing for flexible manufacturing and adaptation to different turbocharger inlets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the supply duct is made shorter to adapt to constrained engine compartment architecture, then the device complexity is reduced and installation space is saved, but the aerodynamic characteristics deteriorate due to multiple bends and strong diameter restrictions
Solution Approach 1:
The supply duct is divided into a rigid horn portion (with optimal aerodynamic shape) and a flexible duct portion (absorbing relative movements). This segmentation allows the rigid part to maintain optimal aerodynamic characteristics while the flexible part adapts to spatial constraints and movement requirements.
Solution Approach 2:
The horn portion is designed with a three-dimensional conical shape that optimizes airflow in multiple directions. The conical transition section creates favorable aerodynamic characteristics by progressively changing the cross-sectional area in three dimensions, rather than using simple bends in a single plane.
2Reliability
If the horn is designed with optimal aerodynamic shape (conical transition), then the airflow characteristics improve, but the manufacturing difficulty increases due to demolding constraints
Solution Approach 1:
The horn is segmented into an outer shell (tubular body) and an inner insert (conical transition section). This allows the insert to be manufactured separately with optimal aerodynamic shaping, then assembled into the horn, bypassing demolding constraints while maintaining aerodynamic performance.
Solution Approach 2:
The insert acts as an intermediary element that provides the conical aerodynamic transition without requiring the entire horn to be molded as a single complex piece. The insert can be manufactured using processes better suited for creating precise conical surfaces, then integrated into the horn structure.
3Reliability
If the insert is used to create conical inner duct, then the aerodynamic characteristics improve, but the device complexity increases due to additional components and assembly steps
Solution Approach 1:
The insert is integrated into the horn structure through fixed connections (adhesive, welding, or screwing), merging the functions of the insert (aerodynamic shaping) and the horn (structural support and connection) into a unified assembly. This reduces the functional complexity despite adding a component.
Solution Approach 2:
The insert serves multiple functions: creating the conical aerodynamic transition, providing a mounting interface within the horn, and potentially serving as a sealing surface. This multi-functionality justifies the additional component by consolidating several requirements into one element.
Data Source
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AI summary
A flange (10) for a supply conduit (11) of a turbocharger (12) comprises a tubular body (13) having fastening elements allowing a first end of the tubular body (13) to be attached to an intake of the turbocharger (12). The flange (10) comprises an insert (14) consisting of a part separate from the tubular body (13), mounted in a receiving housing (15) delimited by said body (13). The insert (14) delimits a conical inner conduit (16) of which the cross-section narrows in a direction towards the turbocharger (12) when the tubular body (13) is mounted on the turbocharger (12) via said fastening elements.