Exhaust Pressure Control Valve With Offset Axis
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Solution Overview
Problem
Existing exhaust gas pressure control valves restrict the cross-sectional area of exhaust gas pipelines when fully open, causing resistance and inefficiency in gas flow, which affects engine performance and fuel efficiency.
Innovation Solution
The exhaust gas pressure control valve is designed with a housing having a larger cross-sectional surface downstream, a non-overlapping valve axis, and a tilting valve element that adjusts flow by 45 to 70 degrees, allowing full cross-sectional area exhaust when open, and is driven by elastic elements like coil springs to control gas flow effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the exhaust gas pressure control valve is formed with predetermined thickness and the valve axis is disposed traverse to the center of the exhaust gas pipeline, then the valve can effectively control exhaust gas pressure, but the cross-sectional area of the exhaust gas pipeline becomes smaller due to valve thickness and projection area of the valve axis
Solution Approach 1:
The valve axis is positioned outside the cross-sectional area of the exhaust gas pipeline, changing the spatial arrangement from a conventional in-line configuration to an offset configuration. This dimensional repositioning allows the valve to control exhaust gas pressure while not obstructing the full cross-sectional area of the pipeline when open.
Solution Approach 2:
The valve element is designed with asymmetric geometry where the valve axis does not coincide with the centerline of the exhaust gas pipeline. This asymmetric arrangement allows the valve to effectively block the pipeline when closed while maintaining full cross-sectional flow area when open, resolving the contradiction between control effectiveness and flow area.
2Reliability
If the valve element tilts by 45 to 70 degrees to close the communication path, then effective exhaust gas pressure control is achieved, but the valve element occupies space within the pipeline cross-section
Solution Approach 1:
The valve element utilizes a tilting motion around an axis positioned outside the pipeline cross-section. This dimensional arrangement allows the valve element to effectively block the pipeline when tilted at 45-70 degrees while not permanently occupying space within the cross-sectional area when in the open position.
Solution Approach 2:
The valve element employs a dynamic tilting mechanism that allows it to assume different angular positions (45-70 degrees for closing, other positions for opening). This dynamic capability enables effective pressure control when closed while maintaining full cross-sectional area when open, resolving the contradiction between control effectiveness and available flow area.
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 design ensures gases exhaust from the entire cross-sectional area of the pipeline, improving fuel efficiency and engine performance by maintaining temperature and reducing noise, as demonstrated by increased driving distances per liter in both diesel and gasoline engine tests.
Implementation Method 1
The driving unit can be all types of elastic elements including coil springs for providing elasticity of to a rotation of the valve element
Data Source
Figure 1
Figure 2(A)~2(D)
Figure 3(A)~3(C)
AI summary
The present invention provides an exhaust gas pressure control valve which allows discharge of exhaust gases from entire cross-sectional area of the exhaust gas pipeline when the exhaust gas pressure control valve completely. An exhaust gas pressure control valve (9) is mounted on a gas pipeline (7) having a first cross-section where exhaust gas from engine communicates and disposed upstream or downstream of a muffler (4). The exhaust gas pressure control valve (9) comprises: a housing (95A) having a first cross-sectional surface and a second cross-sectional surface larger than the first surface and connected to the gas pipelines for communicating the exhaust gas; the valve axis (96) supported along the second cross-section not overlapping with the first cross-section when viewed from the flowing direction, the valve axis supported by the housing in a crossing direction to the flowing direction; and a valve element (92) connected to the valve axis and adjusts flow of the exhaust gas communicating to the gas pipeline.