Pre-Chamber Gas Valve Housing With Heat-Dissipating Protrusions
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Solution Overview
Problem
Inconsistent pre-chamber valve functioning in combustion engines leads to undesirable effects such as re-ignition, backfiring, and soot formation due to incomplete closure and sealing defects, allowing combustible mixtures and exhaust gases to enter the pre-chamber.
Innovation Solution
A pre-chamber gas valve arrangement with protrusions extending radially from the housing, creating cavities with a larger radial and axial extension than circumferential extension, which absorb and dissipate heat from inadvertently entering fluids, reducing the risk of backfiring by minimizing temperature and penetration depth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pre-chamber valve is designed with simple structure, then manufacturing cost is reduced, but reliability against backfiring deteriorates due to insufficient protection against combustible mixture entering the pre-chamber
Solution Approach 1:
The patent introduces an intermediary structure (the housing with channel and protrusions) between the pre-chamber valve and the combustion area. This intermediary component absorbs and dissipates heat from combustible mixtures that inadvertently enter the pre-chamber, preventing backfiring without requiring changes to the valve structure itself.
Solution Approach 2:
The patent converts the harmful effect of heat from entering combustible mixtures into a beneficial effect by using the housing structure to absorb and dissipate this heat through its protrusions and channels, thereby protecting the pre-chamber from backfiring while maintaining simple valve design.
2Reliability
If the valve closure is made more reliable, then backfiring risk is reduced, but manufacturing precision requirements increase leading to higher costs
Solution Approach 1:
The patent provides beforehand protection by designing a housing structure that can absorb and dissipate heat from combustible mixtures even if they enter the pre-chamber due to valve sealing defects or timing inconsistencies. This cushioning effect prevents backfiring without requiring perfect valve closure.
3Productivity
If the pre-chamber is flushed with combustible fluid to maintain gas mass flow, then engine performance is improved, but the risk of re-ignition and soot formation increases when valve closure is insufficient
Solution Approach 1:
The housing with its protrusions and channels acts as an intermediary that allows combustible fluid to flow through while providing heat absorption and dissipation capabilities. This mediator structure enables maintained gas mass flow for engine performance while protecting against harmful re-ignition and soot formation.
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 arrangement effectively reduces the risk of backfiring and re-ignition by absorbing and dissipating heat from entering fluids, maintaining a predefined volume flow, and preventing reverse fluid flow, thus ensuring engine safety and performance.
Implementation Method 1
The first end of the channel is arranged upstream of the second end of the channel and downstream of the protrusions, wherein the protrusions are spaced apart from each other in a circumferential direction and define a respective cavity between respective adjacent protrusions
Implementation Method 2
absorb and dissipate heat from inadvertently entering fluids, reducing the risk of backfiring by minimizing temperature and penetration depth
Data Source
Figure 1
Figure 2~3
AI summary
The present invention pertains to arrangements for a pre-chamber of a combustion engine as well as pre-chambers comprising such arrangements, in particular to avoid or impair backfiring or flashbacks of a combustible mixture and/or to enable a flame retardation within a respective pre-chamber. Accordingly, an arrangement (10) for a pre-chamber gas valve of a combustion engine, preferably a gas engine, is suggested, which comprises a housing (14) having an outer surface (16) and comprising a channel (18), wherein a first end (20) of the channel (18) is in fluid communication with the outer surface (16) and a second end (22) of the channel (20) is connectable to a valve seat of the pre-chamber gas valve. The arrangement (10) furthermore comprises a plurality of protrusions (34) extending radially outward from the outer surface (16) of the housing (14). The first end (20) of the channel (18) is arranged upstream of the second end (22) of the channel (18) and downstream of the protrusions (34), wherein the protrusions (34) are spaced apart from each other in a circumferential direction and define a respective cavity (36) between respective adjacent protrusions (34), each cavity (36) having an extension being larger in a radial direction and/or axial direction than an extension in the circumferential direction.