CN202483706U - Pre-combustion chamber of gas internal combustion engine - Google Patents
Pre-combustion chamber of gas internal combustion engine Download PDFInfo
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- CN202483706U CN202483706U CN2012200711584U CN201220071158U CN202483706U CN 202483706 U CN202483706 U CN 202483706U CN 2012200711584 U CN2012200711584 U CN 2012200711584U CN 201220071158 U CN201220071158 U CN 201220071158U CN 202483706 U CN202483706 U CN 202483706U
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- 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
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Abstract
The utility model relates to the technical field of members of gas internal combustion engines and particularly relates to a pre-combustion chamber of a gas internal combustion engine. The pre-combustion chamber comprises a main chamber body and a lower chamber body, wherein a spark plug is arranged in the main chamber body, the main chamber body and the lower chamber body constitute the pre-combustion chamber, the lower chamber body comprises a cylindrical wall, a bottom wall and a round angle wall, a central through hole is formed in the center of the bottom wall, peripheral holes are formed in the round angle wall, and the central axis of the peripheral holes forms an acute angle with the central axis of the lower chamber body, and forms an acute angle with the radial direction of the lower chamber body. Thus, the spraying direction of gas is downward, and inlet gas of the pre-combustion chamber performs turbulent motion, so that the pre-combustion chamber is very easy to be ignited and the gas can form rotational flow rotating around the lower chamber body after being ejected; and furthermore, the apertures of the central through hole and the peripheral holes are smaller, so that flame of the pre-combustion chamber can be ejected at a high speed for igniting a main combustion chamber and enabling a dilute fuel mixture of the main combustion chamber to realize full combustion, thus the stability in operation of the internal combustion engine is ensured and the occurrence of the intermittent shutdown phenomenon of the internal combustion engine is fully avoided.
Description
Technical field
The utility model relates to gas internal-combustion engine component technology field, particularly relates to a kind of gas internal-combustion engine precombustion chamber.
Background technique
In internal-combustion engine, when fuel and AIR MIXTURES burning, will produce nitrogen oxide (NO
x).Usually, the discharge amount of nitrogen oxide will increase when peak combustion temperatures rises.Discharged nitrous oxides can reduce air quality when extraneous, is detrimental to health simultaneously.At present,, promptly adopt lean combustion, can reduce peak combustion temperatures, therefore reduce the amount of the nitrogen oxide that produces in the burning through increasing the air/fuel ratio of fuel mixture.But the air/fuel ratio of increase fuel mixture will cause the lean mixture to be difficult for lighting.
At present, adopt the ignite lean mixture of precombustion chamber of spark plug, the flame of precombustion chamber ejection and then light the lean mixture of the main combustion chamber that is connected with precombustion chamber.In the existing technology,, cause the lean mixture of precombustion chamber still to be difficult for lighting because the design of precombustion chamber is undesirable.And the velocity of combustion of lean mixture in cylinder in the gas internal-combustion engine of big cylinder diameter is slow, causes the burning of lean mixture abundant inadequately, thereby causes internal-combustion engine to produce intermittent truce phenomenon easily.
The patent No. is respectively 200620072545.4 and 200820063417.2 Chinese utility model patent; A kind of gas internal-combustion engine precombustion chamber is disclosed respectively; The duct that the disclosed gas internal-combustion engine precombustion chamber of these two patents is connected with main combustion chamber is two periphery holes, is difficult for lighting the lean mixture of main combustion chamber through the flame of above-mentioned two periphery holes ejection.The patent No. is 200820020501.6 Chinese utility model patent, discloses a kind of precombustion chamber, and this precombustion chamber comprises upper body, intermediate and lower body, and the lower body outer end is provided with central through bore and auxiliary aperture.Though this utility model patent makes through central through bore and at least one auxiliary aperture and forms turbulent motion in the precombustion chamber; At full speed jet out flames and light main combustion chamber; But; This utility model patent is to the aperture of central through bore and auxiliary aperture, and the perforation angle of auxiliary aperture studies, thereby do not have to explore the sufficient comparatively ideal precombustion chamber design of lean mixture burns that main combustion chamber was lighted and made to the precombustion chamber of sening as an envoy to easily.
Summary of the invention
The purpose of the utility model is to deficiency of the prior art a kind of gas internal-combustion engine precombustion chamber to be provided; This gas internal-combustion engine precombustion chamber can make the precombustion chamber of internal-combustion engine and the lean mixture of main combustion chamber light easily; And make the lean mixture burns abundant, thereby avoided the generation of the intermittence truce phenomenon of internal-combustion engine fully.
For achieving the above object, the utility model is realized through following technological scheme.
A kind of gas internal-combustion engine precombustion chamber is provided, comprises main chamber's body and following chamber body, be provided with spark plug in the said main chamber body; Said main chamber body and said chamber body down constitute precombustion chamber; Said chamber body down comprises cylindrical wall, diapire and fillet wall, and the center of said diapire is provided with central through bore, and said fillet wall is provided with periphery holes; The medial axis of the medial axis of said periphery holes and following chamber body acutangulates, and with radially the acutangulating of following chamber body.
The angle that the medial axis of the medial axis of said periphery holes and said chamber body down forms is 30 ° ~ 85 °; The diameter of said central through bore and said periphery holes is 0.8mm ~ 1.5mm.
The angle that the medial axis of the medial axis of said periphery holes and said chamber body down forms is 55 °; The diameter of said central through bore and said periphery holes is 1.2mm.
The underpart of said main chamber body is provided with internal thread, and the said upper end portion of chamber body down is provided with outside thread, and said main chamber body is threaded with following chamber body.
The excircle of said main chamber body is provided with O-ring seal.
The quantity of said O-ring seal is two.
The underpart of said main chamber body also is provided with outside thread.
The medial axis of said central through bore overlaps with the said medial axis of chamber body down.
The quantity of said periphery holes is four.
The quantity of said periphery holes is six.
The beneficial effect of the utility model: a kind of gas internal-combustion engine precombustion chamber of the utility model, comprise main chamber's body and following chamber body, be provided with spark plug in main chamber's body; Main chamber's body constitutes precombustion chamber with following chamber body; Following chamber body comprises cylindrical wall, diapire and fillet wall, and the center of diapire is provided with central through bore, and the fillet wall is provided with periphery holes; The medial axis of the medial axis of periphery holes and following chamber body acutangulates, and with radially the acutangulating of following chamber body.Because the medial axis of periphery holes acutangulates with the medial axis of following chamber body, can make the injection direction of combustion gas downward; Because the medial axis of periphery holes and radially acutangulating of following chamber body; Can make the air inlet of precombustion chamber produce vortex motion; Thereby make precombustion chamber be easy to light, make combustion gas ejection back form the eddy flow that body rotates around following chamber simultaneously, and the aperture of central through bore and periphery holes is less; The flame of precombustion chamber is sprayed at a high speed; Light main combustion chamber and make the lean mixture burns of main combustion chamber abundant, thereby guarantee the run stability of internal-combustion engine, and avoided the generation of the intermittence truce phenomenon of internal-combustion engine fully.
Description of drawings
Fig. 1 is the embodiment's 1 of a kind of gas internal-combustion engine precombustion chamber of the utility model the structural representation of gas internal-combustion engine precombustion chamber.
Fig. 2 is the embodiment's 1 of a kind of gas internal-combustion engine precombustion chamber of the utility model the decomposition texture schematic representation of gas internal-combustion engine precombustion chamber.
Fig. 3 is the embodiment's 1 of a kind of gas internal-combustion engine precombustion chamber of the utility model the structural representation of following chamber body.
Fig. 4 is the embodiment's 1 of a kind of gas internal-combustion engine precombustion chamber of the utility model the structural representation of another angle of following chamber body.
Fig. 5 is the embodiment's 1 of a kind of gas internal-combustion engine precombustion chamber of the utility model the generalized section of gas internal-combustion engine precombustion chamber.
Fig. 6 is the embodiment's 1 of a kind of gas internal-combustion engine precombustion chamber of the utility model the generalized section of following chamber body.
In Fig. 1 to Fig. 6, include:
Chamber body under 1--main chamber body, the 2--, 3--O-ring seal, 4--precombustion chamber, 101--cylindrical wall,
102--fillet wall, 103--diapire, 201--central through bore, 202--periphery holes,
The angle that forms between the medial axis of the medial axis of α--periphery holes and following chamber body,
The diameter of Ф--central through bore and periphery holes.
Embodiment
In conjunction with following examples the utility model is described further.
See Fig. 1 to Fig. 6.A kind of gas internal-combustion engine precombustion chamber of present embodiment comprises main chamber's body 1 and following chamber body 2, is provided with spark plug in main chamber's body 1; Main chamber's body 1 constitutes precombustion chamber 4 with following chamber body 2; Following chamber body 2 comprises cylindrical wall 101, diapire 103 and fillet wall 102, and the center of diapire 103 is provided with central through bore 201, and fillet wall 102 is provided with periphery holes 202; The medial axis of the medial axis of periphery holes 202 and following chamber body 2 acutangulates, and with radially the acutangulating of following chamber body 2.In the present embodiment, the medial axis of periphery holes 202 is 55 ° with the angle [alpha] of the medial axis formation of following chamber body 2; Central through bore 201 is 1.2mm with the diameter Ф of periphery holes 202.Because the medial axis of periphery holes 202 acutangulates with the medial axis of following chamber body 2, can make the injection direction of combustion gas downward; Because the medial axis of periphery holes 202 and radially acutangulating of following chamber body 2; Can make the air inlet of precombustion chamber 4 produce vortex motion; Thereby make precombustion chamber 4 be easy to light, make the combustion gas ejection back of lighting form the eddy flow that body 2 rotates around following chamber simultaneously, and the aperture of central through bore 201 and periphery holes 202 is less; The flame of precombustion chamber 4 is sprayed at a high speed; Light main combustion chamber and make the lean mixture burns of main combustion chamber abundant, thereby guarantee the run stability of internal-combustion engine, and avoided the generation of the intermittence truce phenomenon of internal-combustion engine fully.
The underpart of main chamber's body 1 is provided with internal thread, and the upper end portion of following chamber body 2 is provided with outside thread, and main chamber's body 1 is threaded with following chamber body 2.Because main chamber's body 1 and following chamber body 2 be through being threaded, thereby make the gas internal-combustion engine precombustion chamber of the utility model freely to dismantle, easy to assembly.
The excircle of main chamber's body 1 is provided with two O-ring seals 3.Be installed in the cylinder head of internal-combustion engine when main chamber's body 1 after, the underpart of main chamber's body 1 places in the water cavity, and the upper end portion of main chamber's body 1 places in the machine oil chamber, and two O-ring seals 3 are used for effectively cutting off water cavity and machine oil chamber, thereby improves sealability.
The underpart of main chamber's body 1 also is provided with outside thread.Main chamber's body 1 is fixed on the cylinder head of internal-combustion engine through the outside thread of its underpart, thereby for convenience detach, is convenient to install.
The medial axis of central through bore 201 overlaps with the medial axis of following chamber body 2, makes that the air inlet of combustion gas is even, and the combustion gas of lighting can produce vortex motion when ejection precombustion chamber 4.
In the present embodiment, the quantity of periphery holes 202 is four.When internal combustion engine operation, central through bore 201 and four dischargings that periphery holes 202 is used to make lean mixed gas entering precombustion chamber 4 and is used for the products of combustion of precombustion chamber 4.At the run duration of internal-combustion engine, internal combustion engine moves up during compression cycle, and when the lean mixture in the cylinder was compressed to a certain degree, the lean mixture was pressed into precombustion chamber 4 through central through bore 201 and four periphery holes 202.Central through bore 201 and four periphery holes 202 need have enough big hole area precombustion chamber 4 when guaranteeing internal combustion engine through top dead center and fill up the lean mixed gas; Simultaneously; Central through bore 201 and four periphery holes 202 need enough little so that the exhaust velocity of precombustion chamber 4 near the velocity of sound, thereby make the gas band that burns in the precombustion chamber 4 that flame at full speed sprays and the lean mixture in the main combustion chamber is lighted.
In the present embodiment; Since the medial axis of four periphery holes 202 respectively and the angle [alpha] that forms between the medial axis of following chamber body 2 be 55 °; With respect to central through bore 201 is that four periphery holes 202 that are obliquely installed can produce vortex motion when air inlet, and the lean mixture that gets into precombustion chamber 4 is proceeded vortex motion in precombustion chamber 4, and air in the entering precombustion chamber 4 and the density difference between the fuel and vortex motion cause the lean demixing in the precombustion chamber 4 jointly; Thereby make spark plug be easy to light the lean mixture in the precombustion chamber 4 through the spark of two electrodes; The lean mixture of being lighted expands rapidly in precombustion chamber 4, simultaneously owing to the aperture of the central through bore 201 that is communicated with precombustion chamber 4 and main combustion chamber and four periphery holes 202 is less, therefore; Follow throttling action to produce pressure difference; Make to form turbulent motion in the precombustion chamber 4, and make the lean mixture band of lighting flame at full speed from precombustion chamber 4 interior ejections, the flame of ejection is almost lighted the lean mixture in the main combustion chamber rapidly simultaneously; Thereby in main combustion chamber, produce strong burning turbulent motion, the rapid combustion in main combustion chamber of most lean mixture.Because the energy that produces after the lean mixture burns of precombustion chamber 4 is far longer than the energy of spark plug; And then make the lean mixture of main combustion chamber be easy to light; And it is more abundant to burn, thereby guarantees that internal combustion engine operation is stable, improves the functional reliability of internal-combustion engine.
In the present embodiment, precombustion chamber 4 is the lean mixture with the combustion gas that main combustion chamber uses, thereby has reduced the discharge amount of nitrogen oxide.And the gas internal-combustion engine precombustion chamber of the utility model is a separate component, can freely dismantle, and easy to assembly, cost is low, long service life.
The embodiment 2 of a kind of gas internal-combustion engine precombustion chamber of the utility model, present embodiment and embodiment's 1 difference are that the medial axis of periphery holes 202 is 65 ° with the angle [alpha] of the medial axis formation of following chamber body 2; Central through bore 201 is 1.0mm with the diameter Ф of periphery holes 202.Other structure and the working principle of present embodiment are identical with embodiment 1, repeat no more at this.
The embodiment 3 of a kind of gas internal-combustion engine precombustion chamber of the utility model, present embodiment and embodiment's 1 difference are that the medial axis of periphery holes 202 is 30 ° with the angle [alpha] of the medial axis formation of following chamber body 2; Central through bore 201 is 1.5mm with the diameter Ф of periphery holes 202.Other structure and the working principle of present embodiment are identical with embodiment 1, repeat no more at this.
embodiment 4.
The embodiment 4 of a kind of gas internal-combustion engine precombustion chamber of the utility model, present embodiment and embodiment's 1 difference are that the medial axis of periphery holes 202 is 85 ° with the angle [alpha] of the medial axis formation of following chamber body 2; Central through bore 201 is 0.8mm with the diameter Ф of periphery holes 202.Other structure and the working principle of present embodiment are identical with embodiment 1, repeat no more at this.
embodiment 5.
The embodiment 5 of a kind of gas internal-combustion engine precombustion chamber of the utility model, present embodiment and embodiment's 1 difference are that the quantity of periphery holes 202 is six.Central through bore 201 and six periphery holes 202 can make precombustion chamber 4 interior formation turbulent motions stronger, thereby the lean mixtures in the precombustion chamber 4 are lighted more easily, and make the lean mixture of main combustion chamber more be prone to light, and it is more abundant to burn.Other structure and the working principle of present embodiment are identical with embodiment 1, repeat no more at this.
Should be noted that at last; Above embodiment only be used to explain the utility model technological scheme but not to the restriction of the utility model protection domain; Although the utility model has been done detailed description with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technological scheme of the utility model, and do not break away from the essence and the scope of the utility model technological scheme.
Claims (10)
1. a gas internal-combustion engine precombustion chamber is characterized in that: comprise main chamber's body and following chamber body, be provided with spark plug in the said main chamber body; Said main chamber body and said chamber body down constitute precombustion chamber; Said chamber body down comprises cylindrical wall, diapire and fillet wall, and the center of said diapire is provided with central through bore, and said fillet wall is provided with periphery holes; The medial axis of the medial axis of said periphery holes and following chamber body acutangulates, and with radially the acutangulating of following chamber body.
2. a kind of gas internal-combustion engine precombustion chamber according to claim 1 is characterized in that: the angle that the medial axis of the medial axis of said periphery holes and said chamber body down forms is 30 ° ~ 85 °; The diameter of said central through bore and said periphery holes is 0.8mm ~ 1.5mm.
3. a kind of gas internal-combustion engine precombustion chamber according to claim 2 is characterized in that: the angle that the medial axis of the medial axis of said periphery holes and said chamber body down forms is 55 °; The diameter of said central through bore and said periphery holes is 1.2mm.
4. a kind of gas internal-combustion engine precombustion chamber according to claim 1 is characterized in that: the underpart of said main chamber body is provided with internal thread, and the said upper end portion of chamber body down is provided with outside thread, and said main chamber body is threaded with following chamber body.
5. a kind of gas internal-combustion engine precombustion chamber according to claim 4 is characterized in that: the excircle of said main chamber body is provided with O-ring seal.
6. a kind of gas internal-combustion engine precombustion chamber according to claim 5 is characterized in that: the quantity of said O-ring seal is two.
7. a kind of gas internal-combustion engine precombustion chamber according to claim 1 is characterized in that: the underpart of said main chamber body also is provided with outside thread.
8. a kind of gas internal-combustion engine precombustion chamber according to claim 1 is characterized in that: the medial axis of said central through bore overlaps with the said medial axis of chamber body down.
9. a kind of gas internal-combustion engine precombustion chamber according to claim 3 is characterized in that: the quantity of said periphery holes is four.
10. a kind of gas internal-combustion engine precombustion chamber according to claim 3 is characterized in that: the quantity of said periphery holes is six.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200711584U CN202483706U (en) | 2012-02-29 | 2012-02-29 | Pre-combustion chamber of gas internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200711584U CN202483706U (en) | 2012-02-29 | 2012-02-29 | Pre-combustion chamber of gas internal combustion engine |
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| Publication Number | Publication Date |
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| CN202483706U true CN202483706U (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200711584U Expired - Lifetime CN202483706U (en) | 2012-02-29 | 2012-02-29 | Pre-combustion chamber of gas internal combustion engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588074A (en) * | 2012-02-29 | 2012-07-18 | 湖南省力宇燃气动力有限公司 | Pre-combustion chamber of gas internal combustion engine |
| CN109424421A (en) * | 2017-09-04 | 2019-03-05 | 曼柴油机和涡轮机欧洲股份公司 | Precombustion chamber arrangement |
-
2012
- 2012-02-29 CN CN2012200711584U patent/CN202483706U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588074A (en) * | 2012-02-29 | 2012-07-18 | 湖南省力宇燃气动力有限公司 | Pre-combustion chamber of gas internal combustion engine |
| CN109424421A (en) * | 2017-09-04 | 2019-03-05 | 曼柴油机和涡轮机欧洲股份公司 | Precombustion chamber arrangement |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121010 |