Compressor Housing Integration for EGR Valve Precision
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Solution Overview
Problem
Existing compressors for charging combustion engines with integrated exhaust gas recirculation (EGR) systems face issues with reliable operation and compact design, as they often require separate assembly of housing components and suffer from excessive mixing of exhaust gases and fresh air, leading to unwanted condensation and mechanical challenges.
Innovation Solution
The compressor integrates the housing of the driving device with the compressor housing, featuring a valve with a slider or rotatable shaft oriented at an angle to the compressor wheel axis, and strategically positioned orifices to minimize gas mixing, along with an optional heating device to prevent icing, resulting in a compact, reliable, and efficient design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the housing of the driving device and compressor housing are assembled as separate parts, then the compressor can be manufactured and assembled more flexibly, but the mechanical precision and reliability of the valve driving mechanics deteriorate
Solution Approach 1:
The housing of the driving device is integrally formed with the compressor housing as a single piece, preferably as a cast part. This merging eliminates the interface between separate housing components, ensuring precise positioning of the valve driving mechanics and eliminating potential leakage paths or mechanical play that would occur with separate assembled parts.
2Ease of manufacture
If the housing of the driving device and compressor housing are assembled as separate parts, then the compressor can be manufactured and assembled more flexibly, but the compactness and space utilization of the compressor deteriorate
Solution Approach 1:
The integral forming of the driving device housing with the compressor housing creates a compact, space-saving design. The merged housing structure eliminates gaps and allows for optimized spatial arrangement of internal components, reducing the overall compressor volume while maintaining all necessary functions.
3Productivity
If exhaust gas channel terminates into inlet channel with maximum mixing, then the exhaust gas recirculation is more effective, but unwanted condensation of corrosive liquid occurs
Solution Approach 1:
The exhaust gas channel terminates into the inlet channel at a specifically designed location and angle, creating a controlled mixing zone. This local optimization ensures that exhaust gas is recirculated effectively while maintaining sufficient temperature and minimizing condensation of corrosive liquids by controlling where and how the gases mix.
4Ease of manufacture
If the valve mechanics are positioned with separate assembled housing parts, then the assembly process is simpler, but the positioning precision and reliability of the valve driving mechanics deteriorate
Solution Approach 1:
The integral housing structure provides precisely positioned mounting points and support surfaces for the valve driving mechanics directly during manufacturing. This eliminates the need for separate alignment and positioning operations that would be required when assembling separate housing parts, ensuring high positioning precision while maintaining manufacturing efficiency.
Data Source
AI summary
Compressor for charging a combustion engine, comprising a compressor housing (1) with a volute (2), a compressor wheel (3) being arranged in the compressor housing (1), the compressor wheel (3) turning about an axis (A) and transporting gas into the volute (2), and an inlet channel (4), at least an end portion of the inlet channel (4) being oriented in the direction of the axis (A) in order to direct gas towards the compressor wheel in the axial direction, wherein an exhaust gas channel (5) terminates into the inlet channel (4) upstream of the compressor wheel (3), and wherein the exhaust gas channel (5) can be shut off by means of a valve (6), wherein a housing (8) of a driving device (7) of the valve (6) is integrally formed with the compressor housing (1).