CN1651755A - Fuel injection nozzle - Google Patents
Fuel injection nozzle Download PDFInfo
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- CN1651755A CN1651755A CN 200510045880 CN200510045880A CN1651755A CN 1651755 A CN1651755 A CN 1651755A CN 200510045880 CN200510045880 CN 200510045880 CN 200510045880 A CN200510045880 A CN 200510045880A CN 1651755 A CN1651755 A CN 1651755A
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- needle
- valve
- cylindrical surface
- nozzle
- inner cylindrical
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Abstract
The present invention relates to a fuel nozzle capable of implementing multiple injection. It belongs to an injection device of fuel combustion system of internal combustion engine. Said fuel nozzle is characterized by that the lower end portion of needle valve of said fuel nozzle is equipped with a circumferential ring groove and on the internal cylindrical surface of said needle valve body a fuel guide groove is set. Said invention also provides the working principle of saod fuel nozzle, it can make the combustion of engine fuel and complete, and can improve noise and starting performance of internal combustion engine. Said fuel nozzle also can be used in direct injection ignited engine.
Description
Technical field
The present invention relates to a kind of oil nozzle of realizing multi-injection, it belongs to the fueling injection equipment of fuel of internal combustion engine system.
Background technique
At present,, the injection system of internal-combustion engine is had higher requirement, occurred a series of means and measures such as duel fuel injector injection, two-spring injector, two Injection Pump and electric-controlled injection thereupon for Economy and the emission performance index that improves internal-combustion engine.But adopt the mechanical structure of above-mentioned fuel system to go back more complicated comparatively speaking, make the manufacture cost increase of internal-combustion engine more, be unfavorable for promoting the use of on a large scale.In compression ignition internal combustion engine, verified pre-oil spout can improve the noise and the startability of internal-combustion engine, and the oil spout behind main injection then can reduce carbon smoke exhaust.Back oil spout behind main jet oil requires the response time fast, and this to be the more above-mentioned means that comprise EFI all be difficult to realize.
Summary of the invention
In order to overcome above-mentioned existing in prior technology deficiency, organize fuel feeding by the every performance index requirement of motor, the invention provides a kind of oil nozzle, this oil nozzle should spray three kinds of modes to the oil mass of a corresponding load of work cycle of motor with pre-spray, main injection, back and spray into the firing chamber, the atomization quality height, improve inflammable mixture and form, make the sufficient combustion of motor and perfect, the economic performance, emission performance and the power performance that help motor further improve.
The technical solution adopted for the present invention to solve the technical problems is: a kind of oil nozzle, it is made up of needle-valve body and needle-valve, be provided with two row's nozzle openings up and down at the needle-valve body head, needle-valve is provided with a lower end and is open vertical hole, the middle part of needle-valve is provided with the transverse holes that communicates with vertical hole, is provided with the cone seal section between needle-valve body and needle-valve.Inner cylindrical surface on the conical seal (contact) face top of needle-valve body is circumferentially with oil guide slot, and following row's nozzle opening is arranged the position of nozzle opening on inner cylindrical surface on the position on the inner cylindrical surface is lower than.Head at needle-valve is provided with circumferential groove in its end portion.On the needle-valve body inner cylindrical surface, be provided with an oil guide slot at least, be generally 4～8.First scheme circumferential groove in its end portion when needle-valve is taken a seat is positioned at arranges nozzle opening down below position on the inner cylindrical surface; Alternative plan be when needle-valve is taken a seat circumferential groove in its end portion arrange down nozzle opening the position on the inner cylindrical surface and on row nozzle opening between the position on the inner cylindrical surface.
The guiding theory of technique scheme is: be provided with oil guide slot because the underpart of needle-valve is provided with the inner cylindrical surface of circumferential groove in its end portion and needle-valve body, when needle-valve takeoff under the oil pressure effect, high pressure fuel entered the circumferential groove in its end portion of oil guide slot and needle-valve through sealing cone.With first scheme is example: in the uphill process that needle-valve takeoffs, the circumferential groove in its end portion of needle-valve is at first connected down row's nozzle opening, carries out pre-spray; When needle-valve was positioned at maximum lift, the circumferential groove in its end portion of needle-valve was connected the row's of going up nozzle opening, carries out main injection, at this moment, and following row's nozzle opening fuel cut-off; In needle-valve was taken a seat process, the circumferential groove in its end portion of needle-valve was connected down row's nozzle opening once more, carried out the back and sprayed.Be provided with the nozzle opening of two row's different cone angle at the needle-valve body head, and stagger mutually in its position, behind pre-spray, the fuel oil of main injection is by last row's nozzle opening ejection, avoided oily bundle to spray in the formed mixed gas of pre-spray, help reducing the formation of soot and make full use of air in the firing chamber, and strengthened the air agitation in the firing chamber, promoted the even mixing of oil gas.Form the back fast and spray in needle-valve is taken a seat process, the response time is fast, and fuel injection quantity is also less, helps improving combustion process, reduces discharging.This oil nozzle also is specially adapted to use the motor that pluralities of fuel has subsidiary combustion chamber.
The invention has the beneficial effects as follows: be provided with oil guide slot because the underpart of this injector valve is provided with the inner cylindrical surface of circumferential groove in its end portion and needle-valve body, when needle-valve takeoff, high pressure fuel entered the circumferential groove in its end portion of needle-valve through oil guide slot.In the process that needle-valve is once opened, finish pre-spray, main injection and back and spray.Because pre-spray and back discharge time are short, fuel injection quantity is few, and the oil spout direction with main injection is different again, has avoided oily bundle to interfere with each other, and has strengthened the air agitation in the firing chamber, has promoted the even mixing of oil gas.Adopt pre-spray to improve the noise and the startability of internal-combustion engine, adopt the back to spray and reduced discharging.Make the sufficient combustion of motor and perfect, the economic performance, emission performance and the power performance that help motor further improve.Utilize pre-spray and back to spray the characteristics that fuel injection quantity does not change with working conditions change, this oil nozzle can also be applied to straight spray ignition type engine, guarantees the stability of igniting.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a kind of structural drawing of oil nozzle.
Fig. 2 is the head enlarged view of oil nozzle shown in Figure 1.
Fig. 3 is the head enlarged view of another kind of oil nozzle.
Fig. 4 is the head enlarged view of needle-valve body.
Fig. 5 is the A-A sectional view of Fig. 4.
Fig. 6 is the position that the needle-valve of oil nozzle shown in Figure 2 is positioned at pre-spray or back injection.
Fig. 7 is the position that the needle-valve of oil nozzle shown in Figure 2 is positioned at main injection.
Fig. 8 is the position that the needle-valve of oil nozzle shown in Figure 3 is positioned at pre-spray or back injection.
Fig. 9 is the position that the needle-valve of oil nozzle shown in Figure 3 is positioned at main injection.
Figure 10 is the structural drawing that this oil nozzle is applied to have the straight spray ignition type engine of subsidiary combustion chamber.
Among the figure: 1, needle-valve body, 1a, arrange nozzle opening down, 1b, on arrange nozzle opening, 1c, oil guide slot, 2, needle-valve, 2a, transverse holes, 2b, vertical hole, 2c, circumferential groove in its end portion, 3, the cone seal section, 3a, 3b, conical seal (contact) face, 4, inner cylindrical surface, 5, piston, 6, cylinder liner, 7, cylinder head, 8, fuel nozzle, 9, spark plug, 10, subsidiary combustion chamber, the angle of A, B, nozzle opening and center line, h, needle lift.
Embodiment
In the embodiment shown in Fig. 1,2,4,5, a kind of oil nozzle, it is made up of needle-valve body 1 and needle-valve 2, be provided with interlaced two row's nozzle opening 1a, 1b up and down at needle-valve body 1 head, needle-valve 2 is provided with a lower end and is open vertical hole 2b, the middle part of needle-valve 2 is provided with the transverse holes 2a that communicates with vertical hole 2b, is provided with cone seal section 3 between needle-valve body 1 and needle-valve 2.Inner cylindrical surface 4 on the conical seal (contact) face 3a top of needle-valve body 1 is circumferentially with four oil guide slot 1c; Four included angle A of arranging nozzle opening 1a and center line down are 50 degree, and four included angle B of upward arranging nozzle opening 1b and center line are 75 degree; Arrange nozzle opening 1a down for four and be lower than the position of row nozzle opening 1b on inner cylindrical surface 4 on four in the position on the inner cylindrical surface 4.Head at needle-valve 2 is provided with circumferential groove in its end portion 2c, and its underpart is provided with conical seal (contact) face 3b.The center of the circumferential groove in its end portion 2c centre distance of supreme row's nozzle opening 1b on inner cylindrical surface 4 equals needle lift h.Fig. 4,5 shows the position on the inner cylindrical surface 4 that four oil guide slot 1c are positioned at needle-valve body 1, and the clearly visible nozzle opening of row down 1a arranges the position of nozzle opening 1b on inner cylindrical surface 4 on the position on the inner cylindrical surface 4 is lower than.
Among Fig. 2, when needle-valve 2 was taken a seat, circumferential groove in its end portion 2c was positioned at and arranges nozzle opening 1a down below position on the inner cylindrical surface 4.Fig. 6 shows down the position of row nozzle opening 1a oil spout, and a kind of is the pre-spray position that takes place when needle-valve 2 takeoffs, and another kind is the back eject position that needle-valve 2 takes place when taking a seat.Because needle-valve 2 is under the effect of high pressure fuel, cone seal section 3 breaks away from, high pressure fuel just enters oil guide slot 1c and circumferential groove in its end portion 2c from the gap between conical seal (contact) face 3a, the 3b, when under circumferential groove in its end portion 2c just in time is positioned at, arranging nozzle opening 1a position, under arrange nozzle opening 1a with regard to commencement of fuel injection, each takes place once in needle-valve 2 takeoffs or take a seat process in this oil spout, is above-mentioned pre-spray or back injection.Fig. 7 shows the position of row's nozzle opening 1b oil spout, the main injection position that takes place when promptly needle-valve 2 is positioned at maximum lift.
Among Fig. 3, when needle-valve is taken a seat, circumferential groove in its end portion 2c arrange down nozzle opening 1a the position on the inner cylindrical surface 4 and on row nozzle opening 1b between the position on the inner cylindrical surface 4.Fig. 8 shows the position of row nozzle opening 1b oil spout, and a kind of is the pre-spray position that takes place when needle-valve 2 takeoffs, and another kind is the back eject position that needle-valve 2 takes place when taking a seat.Fig. 9 shows down the position of row's nozzle opening 1a oil spout, the main injection position that takes place when promptly needle-valve 2 is positioned at maximum lift.
Figure 10 shows this oil nozzle and also is applicable to the straight spray ignition type engine with subsidiary combustion chamber.Be provided with a subsidiary combustion chamber 10 in the main combustion chamber that is made up of piston 5, cylinder liner 6 and cylinder head 7, spark plug 9 is housed in subsidiary combustion chamber 10, the spray orifice of the part of fuel of fuel nozzle 8 through being used for pre-spray and back and spraying sprays into the perforate on the subsidiary combustion chamber 10, in subsidiary combustion chamber, form mixed gas, light by spark plug 9.
Claims (4)
1. oil nozzle, it is made up of needle-valve body (1) and needle-valve (2), two row's nozzle openings (1a) (1b) about needle-valve body (1) head is provided with, needle-valve (2) is provided with a lower end and is open vertical hole (2b), the middle part of needle-valve (2) is provided with the transverse holes (2a) that communicates with vertical hole (2b), between needle-valve body (1) and needle-valve (2), be provided with cone seal section (3), it is characterized in that: the inner cylindrical surface (4) on conical seal (contact) face (3a) top of needle-valve body (1) is circumferentially with oil guide slot (1c), arrange nozzle opening (1a) down and be lower than in the position on the inner cylindrical surface (4) and go up the position of row's nozzle opening (1b) on inner cylindrical surface (4), be provided with circumferential groove in its end portion (2c) at the head of needle-valve (2).
2. according to the described oil nozzle of claim 1, it is characterized in that: on needle-valve body (1) inner cylindrical surface (4), be provided with an oil guide slot (1c) at least.
3. according to the described oil nozzle of claim 2, it is characterized in that: when needle-valve was taken a seat, circumferential groove in its end portion (2c) is positioned at arranged nozzle opening (1a) is gone up the position at inner cylindrical surface (4) below down.
4. according to the described oil nozzle of claim 2, it is characterized in that: when needle-valve is taken a seat, circumferential groove in its end portion (2c) be positioned at down row's nozzle opening (1a) at the position on the inner cylindrical surface (4) and last row's nozzle opening (1b) between the position on the inner cylindrical surface (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100458805A CN1323239C (en) | 2005-02-07 | 2005-02-07 | Fuel injection nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100458805A CN1323239C (en) | 2005-02-07 | 2005-02-07 | Fuel injection nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1651755A true CN1651755A (en) | 2005-08-10 |
| CN1323239C CN1323239C (en) | 2007-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100458805A Expired - Fee Related CN1323239C (en) | 2005-02-07 | 2005-02-07 | Fuel injection nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1323239C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101059111B (en) * | 2007-05-17 | 2010-07-28 | 大连理工大学 | Fuel oil jet method of direct-jet type gasoline engine adopting ignition chamber burning system |
| CN102472210A (en) * | 2009-07-15 | 2012-05-23 | 罗伯特·博世有限公司 | Valve arrangement |
| CN104564468A (en) * | 2014-12-11 | 2015-04-29 | 中国北方发动机研究所(天津) | Diesel nozzle matching part |
| CN106089466A (en) * | 2016-08-24 | 2016-11-09 | 湖南奔腾动力科技有限公司 | A kind of method realizing fuel injector injection control strategy |
| CN106762284A (en) * | 2017-01-18 | 2017-05-31 | 哈尔滨工程大学 | A kind of resonance bypass type electric-controlled fuel injector with ditch |
| CN112648122A (en) * | 2020-12-21 | 2021-04-13 | 中国北方发动机研究所(天津) | Controllable combination fuel sprayer of flame floating length |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH669822A5 (en) * | 1986-02-12 | 1989-04-14 | Sulzer Ag | |
| DE4038443A1 (en) * | 1990-12-01 | 1992-06-04 | Kloeckner Humboldt Deutz Ag | Fuel injector with needle guide for diesel engine - has control pin acting as damping piston, suited to mass prodn. without special finish or machining |
| CN2091361U (en) * | 1991-05-21 | 1991-12-25 | 梁少平 | Fuel spray nozzle for diesel engine direct-injection combustor |
| JPH08296533A (en) * | 1995-04-26 | 1996-11-12 | Nippon Clean Engine Lab Co Ltd | Fuel injection nozzle and combustion system therefor |
| CN2318415Y (en) * | 1997-04-18 | 1999-05-12 | 李延芝 | Slide-rod high-and-low speed fuel spray nozzle for engine |
| EP1380750B1 (en) * | 1999-06-25 | 2005-11-23 | Delphi Technologies, Inc. | Fuel injector |
| JP3882680B2 (en) * | 2001-11-16 | 2007-02-21 | 株式会社デンソー | Fuel injection nozzle |
| CN1277049C (en) * | 2003-10-28 | 2006-09-27 | 金剑 | Cellular type oil nozzle capable of generating oil jetting in advance |
-
2005
- 2005-02-07 CN CNB2005100458805A patent/CN1323239C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101059111B (en) * | 2007-05-17 | 2010-07-28 | 大连理工大学 | Fuel oil jet method of direct-jet type gasoline engine adopting ignition chamber burning system |
| CN102472210A (en) * | 2009-07-15 | 2012-05-23 | 罗伯特·博世有限公司 | Valve arrangement |
| US8955775B2 (en) | 2009-07-15 | 2015-02-17 | Robert Bosch Gmbh | Valve system |
| CN102472210B (en) * | 2009-07-15 | 2015-04-15 | 罗伯特·博世有限公司 | Valve arrangement |
| CN104564468A (en) * | 2014-12-11 | 2015-04-29 | 中国北方发动机研究所(天津) | Diesel nozzle matching part |
| CN106089466A (en) * | 2016-08-24 | 2016-11-09 | 湖南奔腾动力科技有限公司 | A kind of method realizing fuel injector injection control strategy |
| CN106089466B (en) * | 2016-08-24 | 2019-03-15 | 湖南奔腾动力科技有限公司 | A method of realizing fuel injector injection control strategy |
| CN106762284A (en) * | 2017-01-18 | 2017-05-31 | 哈尔滨工程大学 | A kind of resonance bypass type electric-controlled fuel injector with ditch |
| CN112648122A (en) * | 2020-12-21 | 2021-04-13 | 中国北方发动机研究所(天津) | Controllable combination fuel sprayer of flame floating length |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1323239C (en) | 2007-06-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Nantongxignwei oil pump and nozzle Co., Ltd. Assignor: Dalian University of Technology Contract fulfillment period: 2009.5.2 to 2014.4.30 contract change Contract record no.: 2009320000842 Denomination of invention: Mechanical device of copying spark machine for machining the base face of needle-valve body of an oil nozzle Granted publication date: 20070627 License type: Exclusive license Record date: 2009.5.12 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.5.2 TO 2014.4.30; CHANGE OF CONTRACT Name of requester: NANTONG WIEDSON FUEL INJECTION EQUIPMENT CO., LTD. Effective date: 20090512 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070627 Termination date: 20100207 |