CN105971794A - Oil injection delaying method and nozzle - Google Patents
Oil injection delaying method and nozzle Download PDFInfo
- Publication number
- CN105971794A CN105971794A CN201610544243.0A CN201610544243A CN105971794A CN 105971794 A CN105971794 A CN 105971794A CN 201610544243 A CN201610544243 A CN 201610544243A CN 105971794 A CN105971794 A CN 105971794A
- Authority
- CN
- China
- Prior art keywords
- nozzle opening
- shaft part
- conical seal
- glissile segment
- valve needle
- 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.)
- Pending
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
Abstract
The invention discloses an oil injection delaying method and nozzle. The oil injection delaying nozzle comprises a valve, an outer valve needle and an inner valve needle. A sliding hole comprises a first sliding section and a second sliding section. The inner valve needle further comprises a first shaft section and a second shaft section. The first shaft section is located in the first sliding section. The second shaft section is located in the second sliding section. The diameter of the first sliding section is smaller than that of the second shaft section. A drive device drives the outer valve needle to move, and first oil injection holes are opened through a first conical sealing part. After the outer valve needle moves by a certain distance, the first sliding section drives the second shaft section to move, and a second conical sealing part is forced to open second oil injection holes. Part of oil outlet holes work in advance, the purposes of advanced injection and main injection are achieved, and the combustion efficiency is improved.
Description
Technical field
The present invention relates to diesel engine fuel injecting method, particularly relate to after injection method and after injection mouth.
Background technology
Diesel oil enters engine piston chamber by atomizer, and state when diesel oil enters plunger shaft directly affects compression ignition effect.For ensureing efficiency of combustion, scheme is had to propose to improve the flow of diesel oil ejection atomizer, with reference to described in 200510045880.5.The needle-valve bottom of this atomizer is provided with the inner cylinder face of circumferential groove in its end portion and needle-valve body and is provided with oil guide groove, and when needle-valve takeoffs, high pressure fuel enters the circumferential groove in its end portion of needle-valve through oil guide groove.During needle-valve is opened, main injection delays effect.In this case, pilot injection effect is little, little on combustor impact, it is necessary to improve further.
Summary of the invention
The present invention proposes a kind of after injection method and atomizer, improves diesel oil and enters the flow of combustor, it is ensured that efficiency of combustion.
The technical scheme is that and be achieved in that:
A kind of after injection method, it is characterised in that the first nozzle opening and the second nozzle opening are set, first conical seal seals the first nozzle opening, and the second conical seal seals the second nozzle opening, first moves the first tapered portion, open the first nozzle opening, then move the second tapered portion, open the second nozzle opening.
nullA kind of after injection mouth，Including valve body、Outer needle and inner valve needle，Described valve body is provided with pressure chamber、Fuel feed hole and multiple first nozzle opening and the second spray orifice，Described outer needle is movably disposed in described pressure chamber，This outer needle has sliding eye，Described inner valve needle is positioned at this sliding eye，Described outer needle has the first conical seal，This first conical seal is pressed on described first nozzle opening，Described inner valve needle has the second conical seal，This second conical seal is pressed on described second nozzle opening，It is characterized in that，Described sliding eye includes the first glissile segment and the second glissile segment，Described inner valve needle also includes the first shaft part and the second shaft part，Described first shaft part is positioned at described first glissile segment，Described second shaft part is positioned at described second glissile segment，And the diameter of this first glissile segment is less than the diameter of described second shaft part.
In the after injection mouth of the present invention, described first shaft part is between described second shaft part and the second conical seal.
In the after injection mouth of the present invention, described first glissile segment is connected with described second glissile segment by an arcwall face.
Implement this after injection mouth of the present invention, having the advantages that driving means drives outer needle to move, the first conical seal opens the first nozzle opening, after needle moves a segment distance outside, first glissile segment drives the second shaft part to move, and forces the second conical seal to open the second nozzle opening.Part oil outlet work ahead, has reached the purpose of pre-spray and main jet, has improve efficiency of combustion.Segmental arc can slow down the impact to inner valve needle of the outer needle, slows down parts depreciation.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of this after injection mouth of the present invention；
Fig. 2 is the partial view of Fig. 1；
Fig. 3 is the schematic diagram of another state of Fig. 2；
Fig. 4 is the schematic diagram of another state of Fig. 2；
Fig. 5 is the schematic diagram of the valve body of Fig. 1；
Fig. 6 is the partial view of Fig. 5；
Fig. 7 is another partial view of Fig. 5, the attachment structure of main presentation fuel feed hole and pressure chamber；
Fig. 8 is the schematic diagram of the outer needle of Fig. 1.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
Such as this after injection mouth of Fig. 1 to the present invention shown in 7, including valve body 100, outer needle 200.Described valve body 100 is provided with pressure chamber 110, fuel feed hole 120 and multiple first nozzle opening 130.Described outer needle 200 is movably disposed in described pressure chamber 110.Described outer needle 200 has the first conical seal 210, and this first conical seal 210 is pressed on described first nozzle opening 130.Atomizer can also have inner valve needle 300, and valve body 100 can also have the second nozzle opening 140.
This outer needle 200 has sliding eye 230, and described inner valve needle 300 is positioned at this sliding eye 230.Described inner valve needle 300 has the second conical seal 310, and this second conical seal 310 is pressed on described second nozzle opening 140.Described sliding eye 230 includes the first glissile segment 231 and the second glissile segment 232, and described inner valve needle 300 also includes the first shaft part 320 and the second shaft part 330.Described first shaft part 320 is between described second shaft part 330 and the second conical seal 310.Described first shaft part 320 is positioned at described first glissile segment 231, and described second shaft part 330 is positioned at described second glissile segment 232, and the diameter of this first glissile segment 231 is less than the diameter of described second shaft part 330.Driving means drives outer needle 200 to move, and the first conical seal 210 opens the first nozzle opening 130, and after needle 200 moves a segment distance outside, the first glissile segment 231 drives the second shaft part 330 to move, and forces the second conical seal 310 to open the second nozzle opening 140.Part oil outlet work ahead, has reached the purpose of pre-spray and main jet, has improve efficiency of combustion.Described first glissile segment 231 is connected with described second glissile segment 232 by an arcwall face 233.Segmental arc 233 can slow down the impact to inner valve needle 300 of the outer needle 200, slows down parts depreciation.
Described pressure chamber 110 includes oil storage tank 111 and flowline 112, and the medial wall of this flowline 112 has spiral helicine guiding gutter 113.Formed vaporific after the ejection of spiral helicine guiding gutter 113 beneficially diesel oil, it is ensured that diesel oil is fully contacted compressed air, improve efficiency of combustion.Described outer needle 200 is provided with spiral helicine water conservancy diversion rib 220.The rotation direction of water conservancy diversion rib 220 is contrary with guiding gutter 113, and this structure is conducive to the irregular disturbance of diesel oil in pressure chamber 110, it is simple to air-fuel mixture.Described valve body 100 has tapered portion 114, and this first nozzle opening 130 is positioned in described tapered portion 114, and described guiding gutter 113 includes a contraction section 115, and described first nozzle opening 130 of at least one is through this contraction section 115.Diesel oil is introduced directly in part nozzle opening by guiding gutter 113, and the diesel oil flow velocity at this and the flow direction are inconsistent with other positions, are conducive to the formation of turbulent flow, improve efficiency of combustion further.
Described pressure chamber 110 has oil storage tank 111, and described fuel feed hole 120 is connected with described oil storage tank 111 through an arc transiting surface 121, and the diesel oil in fuel feed hole 120 flows into oil storage tank 111 through arc transiting surface 121, and hydraulic pressure is slowly varying, it is to avoid part weathers.Being provided with delay tank 122 bottom this fuel feed hole 120, the height of this delay tank 122 is less than described arc transiting surface 121.Delay tank 122 stores part diesel oil, and when outside diesel oil enters, oil pressure acts directly on the diesel oil of delay, it is to avoid injuring part.Described outer needle 200 has shaft shoulder portion 240, and this shaft shoulder portion 240 is positioned at described oil storage tank 111, and this shaft shoulder portion 240 is between described arc transiting surface 121 and delay tank 122.Shaft shoulder portion 240 bootable diesel oil flowing, it is to avoid diesel oil directly impacts needle.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (4)
1. an after injection method, it is characterised in that the first nozzle opening and the second nozzle opening are set, first conical seal seals the first nozzle opening, and the second conical seal seals the second nozzle opening, first moves the first tapered portion, open the first nozzle opening, then move the second tapered portion, open the second nozzle opening.
null2. an after injection mouth，Including valve body、Outer needle and inner valve needle，Described valve body is provided with pressure chamber、Fuel feed hole and multiple first nozzle opening and the second spray orifice，Described outer needle is movably disposed in described pressure chamber，This outer needle has sliding eye，Described inner valve needle is positioned at this sliding eye，Described outer needle has the first conical seal，This first conical seal is pressed on described first nozzle opening，Described inner valve needle has the second conical seal，This second conical seal is pressed on described second nozzle opening，It is characterized in that，Described sliding eye includes the first glissile segment and the second glissile segment，Described inner valve needle also includes the first shaft part and the second shaft part，Described first shaft part is positioned at described first glissile segment，Described second shaft part is positioned at described second glissile segment，And the diameter of this first glissile segment is less than the diameter of described second shaft part.
After injection mouth the most according to claim 2, it is characterised in that described first shaft part is between described second shaft part and the second conical seal.
After injection mouth the most according to claim 2, it is characterised in that described first glissile segment is connected with described second glissile segment by an arcwall face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610544243.0A CN105971794A (en) | 2016-07-12 | 2016-07-12 | Oil injection delaying method and nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610544243.0A CN105971794A (en) | 2016-07-12 | 2016-07-12 | Oil injection delaying method and nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105971794A true CN105971794A (en) | 2016-09-28 |
Family
ID=56952951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610544243.0A Pending CN105971794A (en) | 2016-07-12 | 2016-07-12 | Oil injection delaying method and nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105971794A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1711416A (en) * | 2002-11-11 | 2005-12-21 | 罗伯特·博世有限公司 | Fuel injection valve for internal combustion engines |
| CN103967671A (en) * | 2014-05-22 | 2014-08-06 | 中国北方发动机研究所(天津) | Dual-valve orifice-area-variable fuel nozzle |
| CN104533684A (en) * | 2014-11-26 | 2015-04-22 | 中国北方发动机研究所(天津) | Double-control-valve multi-sealing-tape fuel nozzle |
-
2016
- 2016-07-12 CN CN201610544243.0A patent/CN105971794A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1711416A (en) * | 2002-11-11 | 2005-12-21 | 罗伯特·博世有限公司 | Fuel injection valve for internal combustion engines |
| CN103967671A (en) * | 2014-05-22 | 2014-08-06 | 中国北方发动机研究所(天津) | Dual-valve orifice-area-variable fuel nozzle |
| CN104533684A (en) * | 2014-11-26 | 2015-04-22 | 中国北方发动机研究所(天津) | Double-control-valve multi-sealing-tape fuel nozzle |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160928 |