CN1657764A - Multi-injection fuel injection nozzle - Google Patents
Multi-injection fuel injection nozzle Download PDFInfo
- Publication number
- CN1657764A CN1657764A CN 200510046012 CN200510046012A CN1657764A CN 1657764 A CN1657764 A CN 1657764A CN 200510046012 CN200510046012 CN 200510046012 CN 200510046012 A CN200510046012 A CN 200510046012A CN 1657764 A CN1657764 A CN 1657764A
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- Prior art keywords
- needle
- valve
- nozzle opening
- spraying
- nozzle
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- 238000002347 injection Methods 0.000 title claims abstract description 56
- 239000007924 injection Substances 0.000 title claims abstract description 56
- 239000000446 fuel Substances 0.000 title claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 abstract description 20
- 238000005507 spraying Methods 0.000 abstract description 8
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 239000007921 spray Substances 0.000 description 24
- 239000003921 oil Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 7
- 238000010304 firing Methods 0.000 description 4
- 238000013019 agitation Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
A multi-injection fuel injection nozzle with annularity and lengthwise opening on the lower part of its needle valve and they are linked with each other by cross direction hole, upper and lower groups of nozzle opening are set on the inner cylinder face of the needle valve, during the start-up of needle valve, pre-spraying, main-spraying and after-spraying are finished; since the period of pre-sprayign and after-spraying is short, the oil quantity is little and doesn't change with that of operating mode, as well as has different direction with the main-spraying, so that the interference of oil can be avoided and the air disturbing in the burner is increased, promoting the oil mixing completely. The pre-spraying has improve the noise and start-up performance of internal-combustion engine, and the after-spraying has reduced the dramage, it makes the burning of engine more complete and benefits for its economical efficiency, dynamic characteristies ; by using the characteristic that the oil quantity doesn't change with that of operating mode, the carburetor jet can be applied in direct injection engine.
Description
Technical field
The present invention relates to a kind of multi-injection fuel injection nozzle, 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 multi-injection fuel injection 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 multi-injection fuel injection nozzle, it is made up of needle-valve body and needle-valve.Be provided with upper and lower row's nozzle opening at the needle-valve body head, following row's nozzle opening is arranged the position of nozzle opening on the needle-valve body inner cylindrical surface on the position on the needle-valve body inner cylindrical surface is lower than.Between needle-valve body and needle-valve, be provided with the cone seal section.Be provided with a lower end in the head center position of needle-valve and be open vertical hole, be provided with circumferential groove in its end portion, in circumferential groove in its end portion, be provided with the transverse holes that is communicated with vertical hole in the bottom of the cone seal section of needle-valve.When needle-valve was taken a seat, circumferential groove in its end portion was positioned at the position that the row's of making nozzle opening is opened, and the lower end external cylindrical surface of needle-valve is closed down row's nozzle opening.When the needle-valve maximum lift, the lower end external cylindrical surface of needle-valve closes the row's of closing nozzle opening, and the lower end external cylindrical surface of needle-valve is opened row's nozzle opening down.
The guiding theory of technique scheme is: because the underpart of needle-valve is provided with circumferential groove in its end portion and vertical hole, and have transverse holes to communicate between circumferential groove in its end portion and the vertical hole.On the inner cylindrical surface of needle-valve body, be provided with upper and lower row's nozzle opening.When needle-valve takeoffs under the oil pressure effect, the circumferential groove in its end portion that high pressure fuel enters needle-valve through sealing cone, and by circumferential groove in its end portion through vertical orifice flow to the needle-valve bottom.In the uphill process that needle-valve takeoffs, circumferential groove in its end portion communicates with last row's nozzle opening, carries out pre-spray by last row's nozzle opening; When needle-valve was positioned at maximum lift, the external cylindrical surface of needle-valve lower end had closed the row's of closing nozzle opening and has opened time row's nozzle opening, by under arrange nozzle opening and carry out main injection; In needle-valve was taken a seat process, the circumferential groove in its end portion of needle-valve is the row's of connection nozzle opening once more, carried out the back by last row's nozzle opening 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 row's nozzle opening ejection down, 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 multi-injection fuel injection 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:, and have transverse holes to communicate between circumferential groove in its end portion and the vertical hole because the underpart of multi-injection fuel injection nozzle needle-valve is provided with circumferential groove in its end portion and vertical hole.On the inner cylindrical surface of needle-valve body, be provided with upper and lower row's nozzle opening.When needle-valve takeoff, high pressure fuel entered circumferential groove in its end portion and vertical hole of needle-valve through sealing cone.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 Economy, emission performance and the power character 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 multi-injection fuel injection nozzle.
Fig. 2 is the head enlarged view of multi-injection fuel injection nozzle shown in Figure 1.
Fig. 3 is the head enlarged view of needle-valve body.
Fig. 4 is the head enlarged view of needle-valve.
Fig. 5 is the position that the needle-valve of multi-injection fuel injection nozzle shown in Figure 2 is positioned at pre-spray or back injection.
Fig. 6 is the position that the needle-valve of multi-injection fuel injection nozzle shown in Figure 2 is positioned at main injection.
Fig. 7 is the structural drawing that multi-injection fuel injection nozzle is applied to have the straight spray ignition type engine of subsidiary combustion chamber.
Among the figure: 1, needle-valve body, 1a, on arrange nozzle opening, 1b, arrange nozzle opening down, 2, needle-valve, 2a, transverse holes, 2b, circumferential groove in its end portion, 2c, vertical hole, 3, the cone seal section, 3a, 3b, conical seal (contact) face, 4, inner cylindrical surface, 5, external cylindrical surface, 6, piston, 7, cylinder liner, 8, cylinder head, 9, fuel nozzle, 10, spark plug, 11, subsidiary combustion chamber.
Embodiment
In the embodiment shown in Fig. 1,2,3,4, a kind of multi-injection fuel injection nozzle, it is made up of needle-valve body 1 and needle-valve 2.Be provided with interlaced upper and lower row's nozzle opening 1a, 1b at needle-valve body 1 head, four angles of arranging nozzle opening 1b and center line down are 50 degree, four angles of going up row nozzle opening 1a and center line are 75 degree, four down row's nozzle opening 1b be lower than in the position on the needle-valve body inner cylindrical surface 4 and arrange the position of nozzle opening 1a on needle-valve body inner cylindrical surface 4 on four.Be provided with circumferential groove in its end portion 2b and vertical hole 2c in the underpart of needle-valve 2, and have transverse holes 2a to communicate between circumferential groove in its end portion 2b and the vertical hole 2c.Between needle-valve body 1 and needle-valve 2, be provided with cone seal section 3.
Among Fig. 2, when needle-valve 2 was taken a seat, circumferential groove in its end portion 2b was positioned at the relevant position of row nozzle opening 1a on needle-valve body inner cylindrical surface 4.Fig. 5 shows 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 circumferential groove in its end portion 2b and vertical hole 2c from the gap between conical seal (contact) face 3a, the 3b, when circumferential groove in its end portion 2b just in time is positioned at row's nozzle opening 1a position, last row's nozzle opening 1a is 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. 6 shows down 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.
Fig. 7 shows multi-injection fuel injection nozzle and also is applicable to the straight spray ignition type engine with subsidiary combustion chamber.Be provided with a subsidiary combustion chamber 11 in the main combustion chamber that is made up of piston 6, cylinder liner 7 and cylinder head 8, spark plug 10 is housed in subsidiary combustion chamber 11, the spray orifice of the part of fuel of fuel nozzle 9 through being used for pre-spray and back and spraying sprays into the perforate on the subsidiary combustion chamber 11, in subsidiary combustion chamber, form mixed gas, light by spark plug 10.
Claims (3)
1. multi-injection fuel injection nozzle, it is made up of needle-valve body (1) and needle-valve (2), be provided with at needle-valve body (1) head, under arrange nozzle opening (1a) (1b), arrange nozzle opening (1b) down and be lower than the row of the going up position of nozzle opening (1a) on inner cylindrical surface (4) in the position on the inner cylindrical surface (4), between needle-valve body (1) and needle-valve (2), be provided with cone seal section (3), it is characterized in that: be provided with a lower end in the head center position of needle-valve (2) and be open vertical hole (2c), bottom in the cone seal section (3b) of needle-valve (2) is provided with circumferential groove in its end portion (2b), is provided with the transverse holes (2a) that is communicated with vertical hole (2c) in circumferential groove in its end portion (2b).
2. according to the described multi-injection fuel injection nozzle of claim 1, it is characterized in that: when needle-valve was taken a seat, circumferential groove in its end portion (2c) was positioned at the position that the row's of making nozzle opening (1a) is opened, and the lower end external cylindrical surface (5) of needle-valve (2) is closed down row's nozzle opening (1b).
3. according to the described multi-injection fuel injection nozzle of claim 1, it is characterized in that: when the needle-valve maximum lift, the lower end external cylindrical surface (5) of needle-valve (2) closes the row's of closing nozzle opening (1a), and the lower end external cylindrical surface (5) of needle-valve (2) is opened row's nozzle opening (1b) down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046012 CN1657764A (en) | 2005-03-11 | 2005-03-11 | Multi-injection fuel injection nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046012 CN1657764A (en) | 2005-03-11 | 2005-03-11 | Multi-injection fuel injection nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1657764A true CN1657764A (en) | 2005-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510046012 Pending CN1657764A (en) | 2005-03-11 | 2005-03-11 | Multi-injection fuel injection nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1657764A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101331304B (en) * | 2005-12-15 | 2012-05-23 | 罗伯特·博世有限公司 | Method for metering fuels to combustion chambers of an internal combustion engine |
| CN105179132A (en) * | 2015-09-30 | 2015-12-23 | 吉林大学 | Needle valve body on oil injector of diesel oil/natural gas dual-fuel engine |
-
2005
- 2005-03-11 CN CN 200510046012 patent/CN1657764A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101331304B (en) * | 2005-12-15 | 2012-05-23 | 罗伯特·博世有限公司 | Method for metering fuels to combustion chambers of an internal combustion engine |
| CN105179132A (en) * | 2015-09-30 | 2015-12-23 | 吉林大学 | Needle valve body on oil injector of diesel oil/natural gas dual-fuel engine |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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