CN204900135U - Engine gaseous fuel direct injection injection nozzle - Google Patents
Engine gaseous fuel direct injection injection nozzle Download PDFInfo
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- CN204900135U CN204900135U CN201520481828.3U CN201520481828U CN204900135U CN 204900135 U CN204900135 U CN 204900135U CN 201520481828 U CN201520481828 U CN 201520481828U CN 204900135 U CN204900135 U CN 204900135U
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Abstract
The utility model relates to an engine gaseous fuel direct injection injection nozzle, this nozzle is by needle valve 1, the needle valve body 2 is constituteed with convex surface nozzle body 3, under reset spring 6's spring force effect, the injection of the needle valve 1 and the conical surface check valve control of gases fuel of 2 constitutions of the needle valve body, nozzle body 3 is that convex body and hollow cylinder combination form, one end is opening hollow cylinder, another end is the convex surface shape of remaining silent, the position has been arranged on the convex body, the aperture orifice different with the figure, convex surface nozzle body 3 is connected through fine screw thread with the needle valve body 2, end face seal is realized with the needle valve body 2 through sealed copper packing 4 to convex surface nozzle body 3, adopt end face contaction between the needle valve body 2 and the nozzle holder, fasten through lock nut 5.
Description
One, technical field
The utility model relates to engine gas injection apparatus, and specifically a kind of engine gas in-cylinder direct injection jet nozzles, belongs to engine fuel injection technology.
Two, background technique
In-cylinder direct injection is a kind of advanced technology of spark-ignition engine fuel supply, and in engine cylinder, direct injection technology achieves the direct adjustment of fuel injection amount, improves Economy and the thermal efficiency of motor.The in-cylinder direct injection technology comparative maturity of liquid fuel, the in-cylinder direct injection as diesel engine and petrol engine achieves good achievement.
Along with the increasingly stringent of motor Abgasgesetz, substitute fuel becomes the effective technology means that engine energy-saving reduces discharging, as liquefied petroleum gas (LPG) (LPG), dimethyl ether (DME), the liquid fuels such as LNG Liquefied natural gas (LNG), hydrogen, compressed natural gas (CNG) is gaseous fuel, compressed natural gas CNG can direct cylinder injection, realize in-cylinder direct injection, it is the primary condition obtaining good mixed gas quality that spraying is uniformly distributed, traditional closed type nozzle due to nozzle hole number few, spray layout pitch is larger, can not ensure at short notice to form uniform mixed gas, although have employed the structural design that two-layer arrangement porous is arranged, still good mixed gas can not fundamentally be obtained.
Current gas jet nozzles be used for engine inlets spray in, with the pressure injection of 5-10Pa, to nozzle hole number and Spreading requirements not high, major part continues to use fuel oil closed type nozzle, when to cylinder inner direct gas, high owing to compressing back pressure in cylinder, realize the mixing of high homogeneous, to the parameters of injector holes of nozzle and needle valve structure designing requirement higher, more existing gas jet nozzles is used for in-cylinder direct injection ignition, as the in-cylinder direct injection circumference combustion system of Xi'an Communications University, this system adopts multiport nozzle, the spray orifice of nozzle is uneven distribution, closeer near spark plug distribution, circumferentially thinning gradually along eddy current direction, mixed gas circularly stratified charge is from thick to thin achieved under not needing to organize the condition of strong intake swirl, but its jet pressure is not high.
When to when directly spraying gas jet fuel on burn engine, jet pressure requires to be greater than 20MPa, obtains good mixed gas in cylinder simultaneously, and spray orifice is arranged and nozzle arrangements is needed new design.
Three, summary of the invention
The purpose of this utility model solves above technical problem, fill up the blank of straight spray gas fuel injection apparatus in engine cylinder, the utility model is achieved in that in engine cylinder, straight spray gas nozzle is by needle-valve, needle-valve body and convex surface nozzle body three part composition, needle-valve and needle-valve body are a pair matching gap couples at 0.001-0.003mm, it forms an inverted cone surface one-way valve, control the injection of gaseous fuel, nozzle body is that convex and hollow cylinder combine, one end is opening, another end is convex shape of remaining silent, position on convex, the spray orifice that aperture is different with number, convex surface nozzle body is connected with fine thread with between needle-valve body, end contact is adopted between needle-valve body and oil injector body, the fastening needle-valve body of locking nut and oil injector body.The conical surface one-way valve that needle-valve and needle-valve body are formed, achieve the control that gas sprays, spray orifice is arranged in separately on convex surface nozzle body, expand spray orifice and arrange degrees of freedom, breakthrough spray orifice and the conical surface are all integrated in the traditional design on needle-valve body, be easy to mate with engine chamber, simplify spray orifice difficulty of processing.
Four, accompanying drawing explanation
Fig. 1 is gaseous fuel in-cylinder direct injection jet nozzles
Fig. 2 is needle valve structure figure
Fig. 3 is needle valve structure figure
Fig. 4 is needle-valve body top surface structure figure
Fig. 5 is convex surface nozzle body structural drawing
Fig. 6 is convex surface nozzle body bottom surface structure figure
Five, embodiment
Engine gas in-cylinder direct injection jet nozzles is made up of needle-valve 1, needle-valve body 2, convex surface nozzle body 3, as shown in Figure 1.Needle-valve 1 is arranged in the endoporus of needle-valve body 2, under the spring-force driven dual of Returnning spring 6, needle-valve 1 conical surface and needle-valve body 2 conical surface seated connection touch and realize conical surface seal, convex surface nozzle body 3 arranges spray orifice, convex surface nozzle body 3 is connected by fine thread with needle-valve body 2, convex surface nozzle body 3 realizes end face seal with needle-valve body 2 by sealing copper packing 4, and needle-valve body 2 upper-end surface contacts with oil injector body lower end surface, fastening by locking nut 5.
Needle-valve 1 is made up of the conical surface 11, Needle shaft 12, first seal groove 13, second seal groove 14, as shown in Figure 2.The conical surface 11 is bottom Needle shaft 12, cone angle is 60 °, Needle shaft 12 is connected with the conical surface 11, Needle shaft 12 top is placed in the endoporus of needle-valve body 2, play the guiding role when needle valve movement, guarantee conical surface seal is good, and the first seal groove 13 and the second seal groove 14 are positioned at Needle shaft 12 upper end, form labyrinth seal with the endoporus of needle-valve body 2.
Needle-valve body 2 is made up of conical surface seat 21, needle-valve body 22, connection outside thread 23, inclination oil duct 24, needle-valve chuck 25 and annular oil groove 26.In fig. 3, conical surface seat 21 is in needle-valve body 22 endoporus lower end, and cone angle is 59 °, connect outside thread 23 and be arranged in needle-valve body 22 periphery bottom, two needle-valve chuck 25 are arranged on needle-valve body 22 upper end external cylindrical surface, arrange about diameter symmetry, for the screw thread of raised securing surface nozzle body 3 with needle-valve body 2; In figure 4, arrange an annular oil groove 26 in needle-valve body 22 upper-end surface, uniform 4 the inclination oil ducts 24 in 90 °, interval in oil groove, each inclination oil duct lower end communicates with needle-valve body 22 endoporus.
Convex surface nozzle body 3 is made up of convex 31 and hollow cylinder 32.In figure 5, convex 31 is radiuses is 50mm sphere, the internal surface of hollow cylinder 32 is arranged internal thread 34, and internal thread 34 is connected with the outside thread 23 on needle-valve body 21, the outer cylinder of hollow cylinder 32 is provided with two fastening draw-in grooves 33, arranges about diameter symmetry; In figure 6, its convex surface is arranged large spray orifice 311 and little spray orifice 312, along the circumferential direction each uniform 8 large spray orifices 311 on two circles that diameter is larger, stagger an angle in adjacent two circumference spray orifice positions, along the circumferential direction uniform 4 little spray orifices 312 on the circle that diameter is minimum.
Claims (2)
1. an engine gas in-cylinder direct injection jet nozzles, it is characterized in that this nozzle is made up of needle-valve (1), needle-valve body (2) and convex surface nozzle body (3) three parts, needle-valve (1) and needle-valve body (2) are a pair matching gaps is the couple of 0.001-0.003mm, it forms an inverted cone surface one-way valve, control the injection of gaseous fuel, the convex of nozzle body (3) arranges the aperture spray orifice different with number, be connected with fine thread between convex surface nozzle body (3) with needle-valve body (2).
2. a kind of engine gas in-cylinder direct injection jet nozzles as claimed in claim 1, it is characterized in that nozzle body (3) is convex and hollow cylinder composite structure, one end is open hollow cylinder, another end is convex shape of remaining silent, convex (31) is a radius is 50mm sphere, convex surface is arranged large spray orifice (311) and little spray orifice (312), along the circumferential direction each uniform 8 large spray orifices (311) on two circles that diameter is larger, stagger an angle in the spray orifice position of adjacent two circumference, along the circumferential direction uniform 4 little spray orifices (312) on the circle that diameter is minimum, the internal surface of hollow cylinder (32) is arranged internal thread (34), internal thread (34) is connected with the outside thread (23) on needle-valve body (2), the outer cylinder of hollow cylinder (32) is provided with two fastening draw-in grooves (33), arrange about diameter symmetry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520481828.3U CN204900135U (en) | 2015-07-07 | 2015-07-07 | Engine gaseous fuel direct injection injection nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520481828.3U CN204900135U (en) | 2015-07-07 | 2015-07-07 | Engine gaseous fuel direct injection injection nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN204900135U true CN204900135U (en) | 2015-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201520481828.3U Active CN204900135U (en) | 2015-07-07 | 2015-07-07 | Engine gaseous fuel direct injection injection nozzle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654312A (en) * | 2017-10-31 | 2018-02-02 | 河南柴油机重工有限责任公司 | A kind of marine engine air inlet pipeline |
| CN116060415A (en) * | 2022-12-21 | 2023-05-05 | 兰州大学 | Garbage recycling intelligent equipment |
-
2015
- 2015-07-07 CN CN201520481828.3U patent/CN204900135U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654312A (en) * | 2017-10-31 | 2018-02-02 | 河南柴油机重工有限责任公司 | A kind of marine engine air inlet pipeline |
| CN116060415A (en) * | 2022-12-21 | 2023-05-05 | 兰州大学 | Garbage recycling intelligent equipment |
| CN116060415B (en) * | 2022-12-21 | 2023-08-18 | 兰州大学 | Garbage recycling intelligent equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |