CN106884706B - Water jacket type pre-burning device - Google Patents
Water jacket type pre-burning device Download PDFInfo
- Publication number
- CN106884706B CN106884706B CN201710057959.2A CN201710057959A CN106884706B CN 106884706 B CN106884706 B CN 106884706B CN 201710057959 A CN201710057959 A CN 201710057959A CN 106884706 B CN106884706 B CN 106884706B
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- China
- Prior art keywords
- cooling water
- prechamber
- water jacket
- shell
- wall
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/12—Engines characterised by precombustion chambers with positive ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/12—Arrangements for cooling other engine or machine parts
-
- 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
Abstract
The invention provides a water jacket type pre-combustion device which is fixedly arranged in an inner cavity of a cylinder cover of an internal combustion engine, and is characterized by comprising the following components: the pre-combustion chamber part is fixedly arranged in the inner cavity and comprises a pre-combustion chamber shell vertically embedded in the inner cavity and a spark plug arranged in the pre-combustion chamber shell; and the prechamber water jacket is sleeved on the prechamber shell, a through hole is arranged between the outer wall of the prechamber water jacket and the inner wall of the cylinder cover and serves as a water inlet channel, an annular gap is formed between the prechamber shell and the inner wall of the prechamber water jacket and serves as a first cooling water channel to be communicated with the water inlet channel, the water inlet channel introduces cooling water into the first cooling water channel through an external internal combustion engine circulating pipeline, and the cooling water flows around the prechamber shell to exchange heat and then flows out. The water jacket type pre-combustion device can enable cooling water to flow in from the bottom and flow out from the top, avoids flowing dead angles, can cool and radiate the pre-combustion chamber shell, and is high in radiating efficiency and long in service life.
Description
Technical Field
the invention relates to an internal combustion engine, in particular to a precombustion device of the internal combustion engine.
background
the large-displacement gas internal combustion engine generally adopts a pre-combustion chamber ignition technology, after a small amount of fuel gas is conveyed to a pre-combustion chamber, a spark plug in a shell of the pre-combustion chamber generates electric sparks to ignite a mixture of the fuel gas and air to generate flame, the flame is sprayed out through a nozzle, and the sprayed flame ignites a large amount of fuel gas mixture in the combustion chamber to further burn and work.
in the prior art, the cylinder cover of the internal combustion engine is tightly attached to the precombustion chamber shell to form a structure with larger overall thickness, the precombustion chamber shell is almost isolated from the outside, the heat dissipation effect is extremely poor, and the temperature of the precombustion chamber shell reaches hundreds of degrees after the precombustion chamber works for a period of time.
Many problems can arise from the high temperature of the prechamber housing, and on the one hand, an excessively high temperature may reach the ignition point of the fuel gas mixture, which may cause the fuel gas mixture to burn immediately upon contact with the housing without being controlled by the ignition of the spark plug, i.e. the high temperature prechamber housing may cause the interior of the gas combustion engine to burn all the time without being normally controlled and burned to perform work by the ignition of the spark plug, i.e. not working normally. On the other hand, due to the overhigh temperature, the nozzle of the pre-combustion chamber is melted and damaged due to overheating or the direction of the spray hole deviates, so that the internal combustion engine cannot work normally; and the service life of the spark plug is also greatly shortened.
Disclosure of Invention
the present invention has been made to solve the above problems, and an object of the present invention is to provide a water jacket type precombustion apparatus which has high heat dissipation efficiency and a long service life, and can effectively cool and dissipate heat from a precombustion chamber casing.
The invention provides a water jacket type pre-combustion device which is fixedly arranged in an inner cavity of a cylinder cover of an internal combustion engine, and is characterized by comprising the following components: the pre-combustion chamber part is fixedly arranged in the inner cavity and comprises a pre-combustion chamber shell vertically embedded in the inner cavity and a spark plug arranged in the pre-combustion chamber shell; and the prechamber water jacket is sleeved on the prechamber shell, a through hole is arranged between the outer wall of the prechamber water jacket and the inner wall of the cylinder cover and serves as a water inlet channel, an annular gap is formed between the prechamber shell and the inner wall of the prechamber water jacket and serves as a first cooling water channel to be communicated with the water inlet channel, the water inlet channel introduces cooling water into the first cooling water channel through an external internal combustion engine circulating pipeline, and the cooling water flows around the prechamber shell to exchange heat and then flows out.
The water jacket type precombustion device provided by the invention can also have the following characteristics: the pre-combustion chamber shell is cylindrical and comprises a pre-combustion chamber upper seat and a pre-combustion chamber cavity shell connected with the pre-combustion chamber upper seat, wherein the pre-combustion chamber upper seat and the pre-combustion chamber cavity shell are sequentially arranged from top to bottom, the interior of the pre-combustion chamber cavity shell is in an inverted cone shape, the bottom of the pre-combustion chamber cavity shell is provided with a hemispherical nozzle, and at least one spray hole is formed in the nozzle.
The water jacket type precombustion device provided by the invention can also have the following characteristics: wherein, the number of orifice is 6 ~ 8, and these 6 ~ 8 orifices are the circumference and evenly arrange on the nozzle.
the water jacket type precombustion device provided by the invention can also have the following characteristics: and a plurality of through holes are arranged in the upper seat of the precombustion chamber and are communicated with the first cooling water channel as a second cooling water channel.
The water jacket type precombustion device provided by the invention can also have the following characteristics: six through holes are formed in the precombustion chamber upper seat, and are uniformly distributed in the circumference.
The water jacket type precombustion device provided by the invention can also have the following characteristics: the outer wall of the prechamber water jacket is provided with a first annular groove, a sealing sleeve is sleeved on the first annular groove and sealed with the inner wall of the cylinder cover, a second annular groove is arranged on the outer wall of the prechamber upper seat, and the sealing sleeve is sleeved on the second annular groove and sealed with the inner wall of the prechamber water jacket.
The water jacket type precombustion device provided by the invention can also have the following characteristics: and the outer wall of the precombustion chamber shell is fixedly provided with radiating fins for enhancing heat transfer.
The water jacket type precombustion device provided by the invention can also have the following characteristics: wherein, inhalant canal's cross-section is squarely, and the width is 2 ~ 10mm, and the width of first cooling water course is 2 ~ 10mm, and the cross-section of second cooling water course is circular, and the internal diameter is 1 ~ 10 mm.
The water jacket type precombustion device provided by the invention can also have the following characteristics: wherein, be provided with the slot piece on the inner wall of cylinder head, the through-hole sets up on this slot piece.
The water jacket type precombustion apparatus provided by the present invention may further include: and the precombustion chamber pressure block component is arranged on the cylinder cover and used for fixing the precombustion chamber component, an annular water outlet groove communicated with the second cooling water channel is arranged on the precombustion chamber pressure block component, and the annular water outlet groove is used for discharging cooling water after heat exchange.
Action and Effect of the invention
According to the water jacket type pre-combustion device, the pre-combustion device is provided with the pre-combustion chamber water jacket sleeved on the pre-combustion chamber shell, cooling water can be introduced from an external internal combustion engine circulating pipeline and enters the water inlet channel and then enters the first cooling water channel from the water inlet channel, the cooling water flows around the pre-combustion chamber shell to exchange heat with the pre-combustion chamber shell and then flows out, and the water has a large specific heat capacity, the highest temperature after being heated is 100 ℃, and the heat of the pre-combustion chamber shell can be transferred, so that the water jacket type pre-combustion device not only can enable the cooling water to flow in from the bottom and then directly flow out from the top, avoids flowing dead angles, increases the flowability, but also can effectively cool and radiate the pre-combustion chamber shell, and is high in radiating efficiency and long in service life.
Drawings
FIG. 1 is a schematic cross-sectional view of a water jacket type pre-combustion device and a cylinder head according to an embodiment of the present invention;
And
Fig. 2 is an enlarged sectional view taken along a-a in fig. 1.
Detailed Description
in order to make the technical means, the creation features, the achievement objects and the effects of the present invention easy to understand, the following embodiments are specifically described with reference to the accompanying drawings.
Fig. 1 is a general cross-sectional view of a water jacket type precombustion apparatus and a cylinder head according to an embodiment of the present invention.
as shown in fig. 1, water jacket type pre-combustion apparatus 100 is connected to a circulation pipe (not shown) of the internal combustion engine in the water jacket type pre-combustion ignition system, and water jacket type pre-combustion apparatus 100 is vertically embedded in an inner cavity of a cylinder head 200 of the internal combustion engine, and includes a pre-combustion chamber part 10, a pre-combustion chamber water jacket 20, and a pre-combustion chamber pressure block assembly 30.
The prechamber part 10 comprises a prechamber housing 11 and a spark plug 12.
The prechamber housing 11 is cylindrical and vertically inserted into the inner cavity of the cylinder head 200, and as shown in fig. 1, the prechamber housing 11 includes a prechamber upper seat 111 and a prechamber cavity housing 112 connected in this order from top to bottom. In this embodiment, the height of the prechamber housing 11 is 232 mm.
Fig. 2 is an enlarged sectional view taken along a-a in fig. 1.
As shown in fig. 1 and 2, the prechamber upper seat 111 has a cylindrical cavity therein for accommodating the spark plug 12, six circular through holes 111a with an inner diameter of 1-10 mm are vertically formed in a side wall of the prechamber upper seat 111, the six through holes 111a are circumferentially and uniformly arranged in the side wall of the prechamber upper seat 111, the six through holes 111a serve as second cooling water channels, a groove is formed in an outer wall of a lower portion of the prechamber upper seat 111, and a sealing sleeve 21 is sleeved on the groove to seal with an inner wall of the prechamber cavity housing 112, in this embodiment, the inner diameter of the second cooling water channel is 3 mm.
The prechamber chamber housing 112 has a reverse tapered shape, and has a reverse tapered cavity inside, the inside of the prechamber chamber housing 112 is communicated with the inside of the prechamber upper base 111 through a communication hole 112a, and a spiral heat radiation fin (not shown) is welded to the outside of the prechamber chamber housing 112. In this embodiment, the prechamber housing 112 has an outer diameter of 62 mm.
the bottom of the precombustion chamber shell 112 is provided with a hemispherical nozzle 113, the nozzle 113 is provided with 6-8 circular spray holes 114, and the diameter of the spray holes 114 is 5 mm. In the embodiment, there are 6 injection holes 114, and the 6 injection holes 114 are uniformly arranged on the nozzle 113 in a circumference.
The spark plug 12 is fitted into a communication hole 112a, and has a lower end screwed into the communication hole 112a and an upper end inserted into a cylindrical cavity in the pre-chamber upper seat 111.
Prechamber water jacket 20 is fitted over prechamber housing 11, and a slot block 22 that can be inserted and removed is provided between the outer wall of prechamber water jacket and the inner wall of cylinder head 200, and slot block 22 is provided with a square through hole (not shown) having a width of 2-10 mm, and this through hole serves as a water intake passage through which cooling water in the internal combustion engine circulation line enters, in this embodiment, the width of water intake passage is 4 mm.
The inner wall of prechamber water jacket 20 and the outer wall of prechamber cavity shell 112 have the annular clearance that the width is 2 ~ 10mm, and this clearance is as first cooling water course, first cooling water course and inhalant canal intercommunication to first cooling water course still communicates with the second cooling water course, and first cooling water course has the bending section that is 90 degrees with the second cooling water course intercommunication department. Further, the prechamber water jacket 20 has a height of 202mm, and in the present embodiment, the width of the first cooling water passage is 2 mm.
The outer wall of the prechamber water jacket 20 is provided with a first annular groove, a sealing sleeve 21 is sleeved on the first annular groove to seal with the inner wall of the cylinder cover 200, the outer wall of the prechamber upper seat 111 is provided with a second annular groove, and the second annular groove is sleeved with the sealing sleeve 21 to seal with the inner wall of the prechamber water jacket 20.
The lower portion of prechamber water jacket 20 has eight projections (not shown) that are used to vertically embed prechamber water jacket 20 in cylinder head 200.
the prechamber mass assembly 30 is fixed to the cylinder head 200 by screws, and is used to fix the prechamber part 10, as shown in fig. 2, the prechamber mass assembly 30 is provided with an annular water outlet channel 31, the annular water outlet channel 31 is communicated with a second cooling water channel, and the cooling water after heat exchange flows into the annular water outlet channel 31 from the second cooling water channel and then flows into the engine circulation line from the annular water outlet channel 31.
The working principle of the water jacket type pre-combustion device 100 of the present invention is as follows:
In fig. 1, the short arrows indicate the flow direction of cooling water, the cooling water pumped from the circulation pipeline of the internal combustion engine enters the first cooling water channel through the water inlet channel and then enters the second cooling water channel from the first cooling water channel, the cooling water surrounds the prechamber housing 11 in the first cooling water channel and the second cooling water channel, the high temperature in the prechamber housing 11 is transferred to the cooling water, so as to cool and dissipate the heat of the prechamber housing 11, and the cooling water after heat transfer flows out from the annular water outlet groove 31 on the prechamber pressing block 30 and finally enters the circulation pipeline of the internal combustion engine outside.
Effects and effects of the embodiments
According to the water jacket formula pre-combustion device that this embodiment is related to, because this pre-combustion device has the pre-combustion chamber water jacket of cover on the pre-combustion chamber casing, cooling water can be introduced and get into the inhalant canal by outside internal-combustion engine circulation pipeline, get into first cooling water course from the inhalant canal again, the cooling water flows after flowing and carrying out the heat transfer with the pre-combustion chamber casing around the pre-combustion chamber casing, because the specific heat capacity of water is great, and the highest temperature after being heated up is 100 ℃, can be with the heat transfer of pre-combustion chamber casing, so, the water jacket formula pre-combustion device of this embodiment not only can let cooling water can flow into the back from the bottom and directly flow from the top, the dead angle that flows has been avoided, mobility has been increased, and can effectively lower the temperature to the pre-combustion chamber casing.
In the embodiment, as the outer wall of the prechamber cavity shell is provided with the radiating fins, on one hand, the contact area is increased, so that high-temperature heat on the prechamber cavity shell can be more quickly transferred to the cooling water in the first cooling water channel; on the other hand, the radiating fins can strengthen the flow of water, generate stronger turbulent flow, have larger heat transfer coefficient and better radiating effect. Due to the arrangement, the prechamber shell can dissipate heat better, and the internal combustion engine is prevented from being burnt out.
In this embodiment, because the outer wall of the prechamber water jacket is provided with the first annular groove, and the first annular groove is provided with the sealing sleeve for sealing with the cylinder head, the prechamber water jacket can be completely attached to the cylinder head in a sealing manner, so that cooling water is prevented from leaking into the cylinder head, the cylinder head and the prechamber water jacket are prevented from being corroded, and the service life of the prechamber water jacket is prolonged.
In this embodiment, owing to be provided with the slot piece that can plug between cylinder head inner wall and prechamber water jacket, when introducing the cooling water for a long time from internal-combustion engine circulation pipeline, the incrustation scale in the cooling water can persist in the through-hole of slot piece, and the cooling effect is influenced very probably, at this moment, can extract the slot piece and wash it for the cooling water can be smooth and easy get into from inhalant canal, and cooling efficiency uprises.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (8)
1. A water jacket type pre-combustion device is fixedly arranged in an inner cavity of a cylinder cover of an internal combustion engine, and is characterized by comprising:
The precombustion chamber component is fixedly arranged in the inner cavity and comprises a precombustion chamber shell vertically embedded in the inner cavity and a spark plug installed in the precombustion chamber shell;
The prechamber water jacket is sleeved on the prechamber shell, and a through hole is arranged between the outer wall of the prechamber water jacket and the inner wall of the cylinder cover and serves as a water inlet channel; and
A prechamber block assembly arranged on the cylinder head for fixing the prechamber element,
Wherein an annular gap is arranged between the prechamber shell and the inner wall of the prechamber water jacket and is used as a first cooling water channel to be communicated with the water inlet channel,
the precombustion chamber shell is cylindrical and comprises a precombustion chamber upper seat and a precombustion chamber cavity shell connected with the precombustion chamber upper seat which are arranged from top to bottom in sequence,
A plurality of through holes are vertically arranged in the precombustion chamber upper seat and are communicated with the first cooling water channel as a second cooling water channel,
An annular water outlet groove communicated with the second cooling water channel is arranged on the pre-combustion chamber pressure block component and used for discharging cooling water after heat exchange,
the water inlet channel introduces cooling water into the first cooling water channel through an external internal combustion engine circulating pipeline, the cooling water enters the second cooling water channel from the first cooling water channel, the cooling water flows around the pre-combustion chamber shell in the first cooling water channel and the second cooling water channel, high temperature in the pre-combustion chamber shell is transferred into the cooling water, so that heat exchange is carried out on the pre-combustion chamber shell, and the cooling water after heat transfer flows out of the annular water outlet groove on the pre-combustion chamber pressing block assembly.
2. the water jacket pre-combustion apparatus as set forth in claim 1, wherein:
The inner part of the precombustion chamber shell is in an inverted cone shape, the bottom of the precombustion chamber shell is provided with a hemispherical nozzle, and at least one spray hole is formed in the nozzle.
3. the water jacket pre-combustion apparatus of claim 2, wherein:
The number of the spray holes is 6-8, and the 6-8 spray holes are uniformly distributed on the nozzle in a circumferential mode.
4. The water jacket pre-combustion apparatus as set forth in claim 1, wherein:
Six through holes are formed in the precombustion chamber upper seat, and are uniformly distributed in the circumference.
5. The water jacket pre-combustion apparatus of claim 2, wherein:
Wherein, the outer wall of the water jacket of the precombustion chamber is provided with a first annular groove, a sealing sleeve is sleeved on the first annular groove to seal with the inner wall of the cylinder cover,
And a second annular groove is formed in the outer wall of the precombustion chamber upper seat, and a sealing sleeve is sleeved on the second annular groove and is sealed with the inner wall of the precombustion chamber water jacket.
6. The water jacket pre-combustion apparatus of claim 2, wherein:
And the outer wall of the precombustion chamber shell is fixedly provided with radiating fins for enhancing heat transfer.
7. The water jacket pre-combustion apparatus as set forth in claim 1, wherein:
Wherein the cross section of the water inlet channel is square, the width is 2-10 mm,
the width of the first cooling water channel is 2-10 mm,
The cross section of the second cooling water channel is circular, and the inner diameter of the second cooling water channel is 1-10 mm.
8. The water jacket pre-combustion apparatus as set forth in claim 1, wherein:
Wherein, be provided with the slot piece on the inner wall of cylinder head, the through-hole sets up on this slot piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710057959.2A CN106884706B (en) | 2017-01-23 | 2017-01-23 | Water jacket type pre-burning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710057959.2A CN106884706B (en) | 2017-01-23 | 2017-01-23 | Water jacket type pre-burning device |
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| Publication Number | Publication Date |
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| CN106884706A CN106884706A (en) | 2017-06-23 |
| CN106884706B true CN106884706B (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710057959.2A Active CN106884706B (en) | 2017-01-23 | 2017-01-23 | Water jacket type pre-burning device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828216A (en) * | 2020-06-28 | 2020-10-27 | 上海中船三井造船柴油机有限公司 | Cooling structure of fuel injector precombustion chamber of dual-fuel diesel engine |
| CN114856797B (en) * | 2021-02-05 | 2023-09-29 | 广州汽车集团股份有限公司 | Engine combustion chamber structure and engine |
| CN115324716B (en) * | 2022-10-14 | 2023-03-24 | 潍柴动力股份有限公司 | Pre-combustion chamber |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821606A (en) * | 2014-03-03 | 2014-05-28 | 潍柴西港新能源动力有限公司 | Pre-combustion generator |
| CN104454220A (en) * | 2013-09-25 | 2015-03-25 | Ge延巴赫两合无限公司 | CYLINDER HEAD and internal combustion engine comprising the same |
| DE102014219144A1 (en) * | 2014-09-23 | 2016-03-24 | Robert Bosch Gmbh | Laser spark plug for an internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0921690A2 (en) * | 2008-12-26 | 2016-02-16 | Mitsubishi Heavy Ind Ltd | gas engine with spark plug and hole cooling holes |
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2017
- 2017-01-23 CN CN201710057959.2A patent/CN106884706B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454220A (en) * | 2013-09-25 | 2015-03-25 | Ge延巴赫两合无限公司 | CYLINDER HEAD and internal combustion engine comprising the same |
| CN103821606A (en) * | 2014-03-03 | 2014-05-28 | 潍柴西港新能源动力有限公司 | Pre-combustion generator |
| DE102014219144A1 (en) * | 2014-09-23 | 2016-03-24 | Robert Bosch Gmbh | Laser spark plug for an internal combustion engine |
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| CN106884706A (en) | 2017-06-23 |
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