Turbocharger Compressor Air Injection Outside Flow Channel
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Solution Overview
Problem
Existing air injection systems for turbocharged internal combustion engines suffer from flow losses and increased risk of nozzle breakage due to protrusion into the flow channel, along with additional component costs when using annular chamber arrangements.
Innovation Solution
A turbocharger compressor arrangement with an injection device positioned outside the flow channel, injecting air into the conical diffuser, which interacts with the main flow to enhance swirl and reduce pressure, eliminating the need for additional components and minimizing flow disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nozzle protrudes into the flow channel to inject air, then the injection effectiveness is improved, but flow losses increase and the risk of nozzle breakage increases
Solution Approach 1:
The injection device is extracted from the flow channel interior and positioned in the annular chamber surrounding the flow channel. This removes the harmful protrusion into the flow path while maintaining the beneficial injection function. The air injection occurs in the annular chamber space, allowing effective interaction with the main flow without obstructing it.
2Reliability
If a nozzle protrudes into the flow channel to inject air, then the injection effectiveness is improved, but the risk of nozzle breakage increases
Solution Approach 1:
The injection device is extracted from the high-stress flow channel environment and relocated to the protective annular chamber. This positioning shields the injection components from direct exposure to high-velocity flow and potential debris, significantly reducing the risk of breakage while maintaining injection functionality.
3Reliability
If an annular chamber arrangement is used within the flow channel, then air injection is achieved, but additional components are required increasing costs
Solution Approach 1:
The annular chamber, which could be considered an additional component, is integrated into the existing compressor housing structure. The housing serves dual functions: containing the compressor components and providing the annular chamber for air injection. This eliminates the need for separate injection chambers or complex additional components.
Solution Approach 2:
The injection device is merged with the compressor housing structure, combining the functions of structural support and air injection delivery. This integration reduces the total component count and simplifies the overall device architecture while maintaining effective air injection capability.
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 configuration reduces flow losses, enhances load application behavior, and operates with lower additional costs, improving efficiency by reinforcing the main flow without adverse effects on the flow channel.
Implementation Method 1
the injected air interacts with the primary fluid of the main flow in the flow channel and supports or intensifies a swirl or spiral flow of the main flow
Implementation Method 2
This advantageously leads to a pressure reduction in the conical diffuser of the compressor assembly
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a compressor assembly for a turbocharger. The compressor assembly (1) comprises: a spiral housing (2), which has a flow channel (12) designed to convey a fluid that can be sucked in from outside of the compressor assembly (1); a compressor outlet flange (3, 11, 16), which is fluidically connected to the spiral housing (2) by means of the flow channel (12), a blow-in device (4, 13, 20), wherein the blow-in device (4, 13, 20) is designed to conduct a fluid into the flow channel (12) from outside of the compressor assembly (1), wherein the blow-in device (4) is arranged outside of the flow channel (12) of the spiral housing (2).