Radial Sealing Ring in Compressor Bypass Valve
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Solution Overview
Problem
Diverter valves for internal combustion engine compressors face challenges with assembly and disassembly difficulties due to gas leakage and sooting, especially with plastic components, which also increase production costs and thermal sensitivity.
Innovation Solution
A diverter valve design featuring a radial sealing ring that rests on the housing wall, eliminating gaps for gas flow and using a deep-drawn metal support ring with a simple shape, allowing for easy assembly and reduced sooting, while maintaining thermal resilience and lowering production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic housing parts are used for the electromagnetic actuator, then assembly is simplified, but gas leakage occurs through gaps and sooting increases
Solution Approach 1:
A metal support ring is introduced as an intermediary component between the plastic housing parts. This support ring provides a gas-tight sealing surface for the radial sealing ring, preventing gas leakage through gaps that would occur with plastic-to-plastic interfaces. The support ring acts as a mediator that combines the assembly simplicity of plastic parts with the sealing reliability of metal surfaces.
2Ease of manufacture
If plastic housing parts are used, then production costs are reduced, but thermal resilience decreases and sooting increases
Solution Approach 1:
Instead of making the entire housing from heat-resistant (and expensive) materials, the invention applies local quality enhancement by using a metal support ring only in the critical high-temperature zone where the electromagnetic actuator is located. This localized metal component provides thermal resilience and sooting resistance where needed, while the rest of the housing can remain as cost-effective plastic material.
3Ease of operation
If positive connection is used between support ring and housing, then assembly is easier, but gas penetration occurs through gaps
Solution Approach 1:
The radial sealing ring serves as a mediator between the positively connected support ring and housing. It creates a gas-tight seal in the gap area without requiring tight tolerances or complex sealing mechanisms. The sealing ring transforms the simple positive connection into a gas-tight assembly by providing a deformable sealing element that bridges the gap.
4Reliability
If tight tolerances are observed in manufacturing, then sealing is improved, but manufacturing precision requirements increase costs
Solution Approach 1:
The radial sealing ring with its V-shaped cross section acts as a flexible sealing element that compensates for manufacturing tolerances. The elastomeric material allows the sealing ring to deform and conform to slight variations in the support ring and housing surfaces, achieving reliable sealing without requiring tight manufacturing tolerances. This flexible sealing approach significantly reduces manufacturing precision requirements.
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 design ensures reliable sealing, reduces sooting, and allows for complete pre-assembly and transport of the valve without additional components, enhancing assembly ease and thermal performance while minimizing production costs.
Implementation Method 1
an electromagnetic actuator (10), a control body (54) which can be moved by means of the actuator
Implementation Method 2
A radial sealing ring (90), via which the housing interior is sealed against a part of the channel radially resting against the control body
Data Source
Figure 1
Figure 2
AI summary
Overrun air recirculation valves for compressors on internal combustion engines, having a flow housing (48) in which there is formed a duct (50), having an electromagnetic actuator (10), having a control body (54) which can be moved by way of the actuator (10) and by way of which a throughflow cross section of the duct (50) can be controlled, having a housing interior (66) in which an armature (32), which is connected to the control body (54), of the electromagnetic actuator (10) is movable, having openings (64) in the control body (54), via which openings the housing interior (66) is fluidically connected to a part, which bears axially against the control body (54), of the duct (50) in the flow housing (48), having a valve housing (11, 40) which radially surrounds the electromagnetic actuator (10) and a part of the axial extent of the control body (54), and having a radial sealing ring (90) by means of which the housing interior (66) is sealed off with respect to a part, which bears radially against the control body (54), of the duct (50) and which lies axially against a radially inwardly pointing ring-shaped plate (88) of a support ring (82) which, by way of a cylinder wall (84), bears radially from the outside against a housing wall (76) of the valve housing (11, 40), are known. To realize a valve with an improved sealing action between the two duct parts to be separated, which valve is inexpensive to produce, it is proposed that the radial sealing ring (90) bears radially at the outside against the housing wall (76) of the valve housing (11, 40).