CN209855900U - Installation structure of spark plug of pre-combustion chamber - Google Patents
Installation structure of spark plug of pre-combustion chamber Download PDFInfo
- Publication number
- CN209855900U CN209855900U CN201920753465.2U CN201920753465U CN209855900U CN 209855900 U CN209855900 U CN 209855900U CN 201920753465 U CN201920753465 U CN 201920753465U CN 209855900 U CN209855900 U CN 209855900U
- Authority
- CN
- China
- Prior art keywords
- spark plug
- combustion chamber
- chamber spark
- hole
- spray
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
A pre-combustion chamber spark plug mounting structure comprises a cylinder cover and a pre-combustion chamber spark plug, wherein the side wall of the top of the pre-combustion chamber spark plug is provided with four first spray holes which are communicated with a pre-combustion chamber of the pre-combustion chamber spark plug, the four first spray holes are uniformly distributed in a 360-degree circumference and extend along the radial direction of the pre-combustion chamber spark plug, each first spray hole inclines towards the top of the pre-combustion chamber spark plug at an angle alpha which is 18-22 degrees, the top surface of the pre-combustion chamber spark plug is provided with a second spray hole which is communicated with the pre-combustion chamber of the pre-combustion chamber spark plug, the central line of the second spray hole and the central line of the pre-combustion chamber spark plug are positioned on the same straight line, the cylinder cover is provided with a spark plug mounting hole for assembling the spark plug, the pre-combustion chamber spark plug is fixedly mounted in the spark plug mounting hole of the cylinder cover through, the overhanging length h is 8-12 mm.
Description
Technical Field
The utility model relates to a gas engine field, in particular to antechamber spark plug mounting structure.
Background
As shown in fig. 1, 2 and 3, after a pre-combustion chamber spark plug commonly used in the field of gas engines is installed, the depth of the head of the spark plug extending into a combustion chamber of a cylinder is about 5mm basically, single spray holes with vertical top ends are adopted, four spray holes are uniformly distributed on the circumference side, pore passages of the four spray holes are spirally distributed, and the included angle between the four spray holes is 120 degrees. The spark plug is arranged on a cylinder cover, and due to the fact that the depth of the spark plug extending into a combustion chamber is shallow, after ignition, flame is directly sprayed on the top area of a groove on the top of a piston through four uniformly distributed spray holes, namely an area A shown in figure 1, and then gas in the combustion chamber is ignited. The gas in the cone ring region from the spray hole to the region A is firstly combusted and then is diffused to other regions, so that the region A is subjected to the highest thermal stress and has the longest duration, and the region A is a region with a higher failure risk coefficient of the top of the piston, so that the failure risk coefficient of the region is increased by using the spark plug structure. Secondly, because the head of the spark plug extends out short and enters the combustion chamber shallowly, the flame is sprayed into the combustion chamber close to the upper part 1/3, firstly the gas in the 1/3 area is ignited, and then the diffusion combustion is carried out, so that the whole combustion speed is slow, and the combustion efficiency is low. And thirdly, the initial flame sprayed through the spirally distributed spray hole channels firstly impacts the inner wall of the spark plug pre-combustion chamber and then is sprayed through the spirally distributed spray hole channels, so that certain resistance is achieved, and the spraying speed and efficiency of the flame are reduced.
Disclosure of Invention
The utility model aims at prior art not enough, a precombustion chamber spark plug mounting structure is provided, the length that the spark plug mounting hole stretches out outward from the precombustion chamber spark plug is longer, the degree of depth that makes the top of precombustion chamber spark plug extend into the cylinder combustion chamber increases, make initial flame spray avoid A region, contained angle increase between each first orifice simultaneously, make initial flame spray be close to cylinder combustion chamber middle part, make flame propagation speed and the time of upper portion and lower part tend towards the balance in the whole combustion chamber, whole flame's propagation speed has been improved, finally, combustion efficiency has been improved, furthermore, it is long when having reduced the regional heat load of cylinder A and high thermal stress duration, failure risk coefficient has been reduced.
The technical scheme of the utility model is that: a pre-combustion chamber spark plug mounting structure comprises a cylinder cover and a pre-combustion chamber spark plug, wherein the side wall of the top of the pre-combustion chamber spark plug is provided with four first spray holes which are communicated with a pre-combustion chamber of the pre-combustion chamber spark plug, the four first spray holes are uniformly distributed in a 360-degree circumference and extend along the radial direction of the pre-combustion chamber spark plug, each first spray hole inclines towards the top of the pre-combustion chamber spark plug at an angle alpha which is 18-22 degrees, the top surface of the pre-combustion chamber spark plug is provided with a second spray hole which is communicated with the pre-combustion chamber of the pre-combustion chamber spark plug, the central line of the second spray hole and the central line of the pre-combustion chamber spark plug are positioned on the same straight line, the cylinder cover is provided with a spark plug mounting hole for assembling the spark plug, the pre-combustion chamber spark plug is fixedly mounted in the spark plug mounting hole of the cylinder cover through, the overhanging length h is 8-12 mm.
The spark plug mounting hole is a stepped hole, a thread section is arranged on the inner wall of the small-diameter section of the stepped hole, and the pre-combustion chamber spark plug is mounted in the small-diameter section of the spark plug mounting hole in a thread fit mode and is axially positioned through a shaft shoulder of the stepped hole.
The length h of the spark plug mounting hole extending out of the top of the pre-combustion chamber spark plug is 10 mm.
The included angle between the central line of each first jet hole and the central line of the spark plug of the pre-combustion chamber is 70 degrees.
Adopt above-mentioned technical scheme to have following effective effect:
the pre-combustion chamber spark plug mounting structure comprises a cylinder cover and a pre-combustion chamber spark plug, wherein the cylinder cover is fixed on the cylinder body and forms a seal for the cylinder body. The side wall of the top of the pre-combustion chamber spark plug is provided with four first jet holes which are communicated with a pre-combustion chamber of the pre-combustion chamber spark plug, the four first jet holes are uniformly distributed in a circumference of 360 degrees and extend along the radial direction of the pre-combustion chamber spark plug, each first jet hole inclines towards the top of the pre-combustion chamber spark plug, alpha is 18-22 degrees, the top surface of the pre-combustion chamber spark plug is provided with a second jet hole which is communicated with the pre-combustion chamber of the pre-combustion chamber spark plug, the central line of the second jet hole and the central line of the pre-combustion chamber spark plug are positioned on the same straight line, initial flame ignited in the pre-combustion chamber spark plug is directly sprayed out through the first jet holes and the second jet holes, the spraying resistance of the initial flame is small, and the spraying speed. The cylinder cover is provided with a spark plug mounting hole for assembling a spark plug, the pre-combustion chamber spark plug is fixedly mounted in the spark plug mounting hole of the cylinder cover through thread matching, the top of the pre-combustion chamber spark plug extends out of the spark plug mounting hole, the extending length h is 8-12mm, the depth of the top of the pre-combustion chamber spark plug extending into a combustion chamber of the cylinder is increased, initial flames ejected from the first spray holes and the second spray holes are prevented from an area A of the cylinder, failure risk coefficients of the top of the piston are effectively reduced, and as included angles between central lines of the four first spray holes and the central line of the pre-combustion chamber spark plug are increased, the ejected initial flames tend to be horizontal, so that the flame propagation speeds and the flame propagation times of the upper portion and the lower portion in the whole combustion chamber tend to be balanced, the propagation speed of the whole flame is.
The following further description is made with reference to the accompanying drawings and detailed description.
Drawings
FIG. 1 is a schematic view of a related art pre-chamber spark plug mounting arrangement;
FIG. 2 is a schematic diagram illustrating the distribution of orifices on a spark plug according to the prior art;
FIG. 3 is a schematic view illustrating the angular distribution of the nozzle holes on the spark plug according to the prior art;
FIG. 4 is a schematic view of the mounting structure of the spark plug of the pre-combustion chamber of the present invention;
FIG. 5 is a schematic diagram of a spark plug with a pre-combustion chamber according to the present invention;
fig. 6 is a top view of fig. 5.
In the drawing, 1 is a cylinder head, 2 is a pre-combustion chamber spark plug, 3 is a first spray hole, 4 is a second spray hole, and 5 is a spark plug mounting hole.
Detailed Description
In the present invention, the devices, structures or parameters not described in detail are all the devices, structures or parameters which are conventional in the art.
Referring to fig. 3-6, an embodiment of a pre-chamber spark plug mounting structure is shown. The pre-chamber spark plug mounting structure includes a cylinder head 1, which is a conventional component in the art, and a pre-chamber spark plug 2. The side wall of the top of the pre-combustion chamber spark plug 2 is provided with four first jet holes 3 which are communicated with the pre-combustion chamber of the pre-combustion chamber spark plug 2, the four first jet holes 3 are all divided into 360-degree circumferences and extend along the radial direction of the pre-combustion chamber spark plug 2, the inclination angle alpha of each first jet hole 3 towards the top of the pre-combustion chamber spark plug 2 is 18-22 degrees, in the embodiment, the inclination angle alpha of each first jet hole towards the top of the pre-combustion chamber spark plug is 20 degrees, namely, the included angle between the center line of each first jet hole 3 and the center line of the pre-combustion chamber spark plug 2 is 70 degrees. The top surface of the pre-combustion chamber spark plug 2 is provided with a second jet hole 4 which is communicated with the pre-combustion chamber of the pre-combustion chamber spark plug 2, and the central line of the second jet hole 4 is positioned on the same straight line with the central line of the pre-combustion chamber spark plug 2. The cylinder cover 1 is provided with a spark plug mounting hole 5 for assembling a spark plug, specifically, the spark plug mounting hole is a stepped hole, a thread section is arranged on the inner wall of a small-diameter section of the stepped hole, the prechamber spark plug 2 is fixedly mounted in the small-diameter section of the spark plug mounting hole 5 of the cylinder cover 1 through thread matching and is axially positioned by a shaft shoulder of the stepped hole, the top of the prechamber spark plug 2 extends out of the spark plug mounting hole 5, and the extending length h is 8-12 mm.
The utility model discloses an theory of operation does, and prechamber spark plug mounting structure's cylinder head adopts conventional mounting means fixed mounting on the cylinder block, forms to seal the cylinder, and the top of prechamber spark plug extends into in the cylinder. The electrode in the pre-combustion chamber of the spark plug of the pre-combustion chamber discharges to ignite the air-fuel mixture in the pre-combustion chamber, the generated initial flame is sprayed out from the four first spray holes and the second spray hole to avoid the area A in the cylinder, the conical taper formed by the spraying of the initial flame is reduced and tends to be horizontal, and the air-fuel mixture in the combustion chamber of the cylinder is ignited, so that the flame propagation speed and time of the upper part and the lower part in the whole combustion chamber tend to be balanced, and the piston is pushed to do work outwards.
Claims (4)
1. A pre-chamber spark plug mounting structure characterized by: comprises a cylinder cover (1) and a pre-combustion chamber spark plug (2),
the side wall of the top of the pre-combustion chamber spark plug (2) is provided with four first spray holes (3) which are communicated with the pre-combustion chamber of the pre-combustion chamber spark plug (2), the four first spray holes (3) are uniformly distributed in a circumference of 360 degrees and extend along the radial direction of the pre-combustion chamber spark plug (2), each first spray hole (3) inclines towards the top of the pre-combustion chamber spark plug (2) at an angle alpha which is 18-22 degrees, the top surface of the pre-combustion chamber spark plug (2) is provided with a second spray hole (4) which is communicated with the pre-combustion chamber of the pre-combustion chamber spark plug (2), the central line of the second spray hole (4) is positioned on the same straight line with the central line of the pre-combustion chamber spark plug (2),
the cylinder cover (1) is provided with a spark plug mounting hole (5) for assembling a spark plug, the pre-combustion chamber spark plug (2) is fixedly mounted in the spark plug mounting hole (5) of the cylinder cover (1) through thread matching, the top of the pre-combustion chamber spark plug (2) extends out of the spark plug mounting hole (5), and the extension length h is 8-12 mm.
2. The pre-chamber spark plug mounting structure as set forth in claim 1, wherein: spark plug mounting hole (5) are the shoulder hole, are equipped with the screw thread section on the path section inner wall of shoulder hole, prechamber spark plug (2) are installed in the path section of spark plug mounting hole (5) through screw-thread fit, and through the shaft shoulder axial positioning of shoulder hole.
3. The pre-chamber spark plug mounting structure as set forth in claim 1, wherein: the length h of the spark plug mounting hole (5) extending out of the top of the pre-combustion chamber spark plug (2) is 10 mm.
4. The pre-chamber spark plug mounting structure as set forth in claim 1, wherein: the included angle between the central line of each first jet hole (3) and the central line of the pre-combustion chamber spark plug (2) is 70 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920753465.2U CN209855900U (en) | 2019-05-23 | 2019-05-23 | Installation structure of spark plug of pre-combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920753465.2U CN209855900U (en) | 2019-05-23 | 2019-05-23 | Installation structure of spark plug of pre-combustion chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209855900U true CN209855900U (en) | 2019-12-27 |
Family
ID=68941642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920753465.2U Active CN209855900U (en) | 2019-05-23 | 2019-05-23 | Installation structure of spark plug of pre-combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209855900U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796869A (en) * | 2021-01-05 | 2021-05-14 | 东风柳州汽车有限公司 | Pre-combustion chamber structure, combustion engine and automobile |
| CN113653560A (en) * | 2021-08-18 | 2021-11-16 | 天津大学 | Gasoline engine ignition mechanism containing strong turbulence jet flow precombustion chamber |
| CN113669152A (en) * | 2021-08-18 | 2021-11-19 | 天津大学 | Gasoline engine ignition mechanism containing strong tumble precombustion chamber |
-
2019
- 2019-05-23 CN CN201920753465.2U patent/CN209855900U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796869A (en) * | 2021-01-05 | 2021-05-14 | 东风柳州汽车有限公司 | Pre-combustion chamber structure, combustion engine and automobile |
| CN113653560A (en) * | 2021-08-18 | 2021-11-16 | 天津大学 | Gasoline engine ignition mechanism containing strong turbulence jet flow precombustion chamber |
| CN113669152A (en) * | 2021-08-18 | 2021-11-19 | 天津大学 | Gasoline engine ignition mechanism containing strong tumble precombustion chamber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209855900U (en) | Installation structure of spark plug of pre-combustion chamber | |
| US6013973A (en) | Spark plug having a sub-combustion chamber for use in fuel ignition systems | |
| US4930473A (en) | Swirl chamber and spark plug assembly | |
| KR100588315B1 (en) | Combustion system for direct injection diesel engines | |
| US11174778B2 (en) | Precombustion chamber gas engine | |
| US5799637A (en) | Rocket effect sparking plug | |
| CN113803150B (en) | Speed response separation type combustion system and engine | |
| JP2014129788A (en) | Precombustion chamber type gas engine | |
| KR20030012931A (en) | Fuel injection system | |
| US10012134B2 (en) | Internal combustion engine | |
| CN113669152A (en) | Gasoline engine ignition mechanism containing strong tumble precombustion chamber | |
| US10833485B2 (en) | Pre-chamber spark plug | |
| US20200165961A1 (en) | Pre-chamber type internal combustion engine | |
| CN112145331A (en) | Spark plug sheath integrated with pre-combustion chamber | |
| CN113653560A (en) | Gasoline engine ignition mechanism containing strong turbulence jet flow precombustion chamber | |
| CN102074897A (en) | Step type spark plug | |
| CN115324722A (en) | Combustion system and gas engine | |
| US20230235695A1 (en) | Prechamber spark plug having an optimized cap, and internal combustion engine | |
| CN210509408U (en) | Large-bore natural gas engine cylinder device with precombustion chamber | |
| CN113685261A (en) | Gasoline engine ignition mechanism containing shared jet orifice precombustion chamber | |
| JP3263487B2 (en) | Combustion chamber of subchamber internal combustion engine | |
| CN215633373U (en) | Cylinder cover assembly, engine with same and vehicle | |
| CN108023276B (en) | Spark plug | |
| CN113653559B (en) | Gasoline engine ignition mechanism comprising eccentric axis type active precombustion chamber | |
| JPS60128975A (en) | Igniter for internal-combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 400000 block B, Jiulong Park, Jiulongpo District, Chongqing Patentee after: Chongqing Pushi New Energy Technology Co.,Ltd. Address before: 400000 block B, Jiulong Park, Jiulongpo District, Chongqing Patentee before: CHONGQING PUSH MECHANISM Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |