CN107013392A - A kind of Performance of Fuel Injection Nozzle - Google Patents
A kind of Performance of Fuel Injection Nozzle Download PDFInfo
- Publication number
- CN107013392A CN107013392A CN201710431595.XA CN201710431595A CN107013392A CN 107013392 A CN107013392 A CN 107013392A CN 201710431595 A CN201710431595 A CN 201710431595A CN 107013392 A CN107013392 A CN 107013392A
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- China
- Prior art keywords
- needle
- valve
- annular groove
- centre bore
- valve body
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A kind of Performance of Fuel Injection Nozzle, needle-valve including needle-valve body and in needle-valve body centre bore, the centre bore waist is provided with the second annular groove, and needle-valve body top is provided with lateral oil input channel, the 3rd annular groove connected with lateral oil input channel is provided with the centre bore on the second annular groove top；Needle-valve epimere both sides are provided with mutually symmetrical vertical flat position, vertical flat position upper end and the cylindrical flat step of composition of needle-valve epimere, the position of flat step is in the 3rd annular groove top, so that vertical constitute the vertical oil input channel for connecting the 3rd annular groove and the second annular groove between flat position and needle-valve body centre bore；The cross-sectional area sum of vertical flat position and the cross-sectional area sum of lateral oil input channel are close or equal.The pintle nozzle match-ing parts add the gap and lubrication between needle-valve and needle-valve body centre bore, it can reduce or prevent that firing well cuts occurs the stuck phenomenon of needle-valve, ensure fuel injector normal work, and the temperature of whole pintle nozzle match-ing parts can be reduced, reduce influence of the thermal stress to pintle nozzle match-ing parts.
Description
Technical field
The present invention relates to a kind of diesel engine part, more particularly to a kind of Performance of Fuel Injection Nozzle.
Background technology
Fuel injector is as the important component of diesel engine, and its working condition will directly influence the performance of diesel engine；Spray
Oily device pintle nozzle match-ing parts include needle-valve body and coordinate the needle-valve being arranged in needle-valve body centre bore, and needle-valve body centre bore waist is provided with horizontal stroke
To annular groove（Second annular groove）, three oil inlets in the first annular groove of needle-valve body end face pass through three lateral oil-feeds
Road is communicated with the second annular groove, and needle-valve is the cylinder with round platform rank, including dome platform, needle-valve epimere and needle-valve hypomere, pin
The external diameter of valve epimere is more than needle-valve hypomere external diameter, and dome platform is located at needle-valve body end face top, and needle-valve epimere is located at the second annular groove
Top is simultaneously closely slidably matched with centre bore, and needle-valve hypomere is located at the second annular groove bottom, needle-valve hypomere excircle and centre bore
Between gap constitute the lower oil duct of the second annular groove of connection and atomizer, the pressure-bearing circular cone that upper and lower section of junction of needle-valve is formed
Cavity between face and the second annular groove constitutes the pressure accumulation chamber of Performance of Fuel Injection Nozzle（As shown in Figure 8）；When fuel injector works, combustion
Oil enters the pressure accumulation chamber of fuel injector from high-pressure oil pipe by lateral oil input channel, and upward push away is produced to the pressure-bearing circular conical surface of needle-valve
Power, overcomes the pretightning force of spring, reaches injection pressure of injector, and needle-valve is opened, the atomizer commencement of fuel injection of fuel injector lower end, when
When oil pressure drops to closing presure, needle-valve is closed under spring force, stops oil spout.
The problem of pintle nozzle match-ing parts of traditional fuel injector are present be：
1. because the fit clearance of needle-valve and needle-valve body is minimum, when heated uneven with impurity and needle-valve in diesel oil, very
The stuck phenomenon of needle-valve is easily caused, after plugging fault occurs for fuel injector, engine difficulty in starting, idling can accordingly occur not
Surely, the symptom such as bad Acceleration, can even cause engine seriously to shake when situation is serious, and trigger associated mechanical original paper mill extremely
The occurrence of damage；
2. Performance of Fuel Injection Nozzle belongs to precision pair, couple can only be changed in pairs, and the couple of different model can not be arbitrarily alternative, one
The stuck phenomenon of needle-valve occurs for denier, otherwise whole atomizer is changed, otherwise it is exactly regularly to check and cleaning, the substantial amounts of people of waste
Power, material resources and financial resources.
The content of the invention
It is an object of the invention to：There is provided a kind of spray simple in construction, new for the shortcoming existed for above-mentioned existing structure
Oily device pintle nozzle match-ing parts, to overcome the above-mentioned deficiency present in prior art.
Adopted the technical scheme that to solve the above technical problem present invention：
A kind of Performance of Fuel Injection Nozzle, including needle-valve body and cooperation are arranged on the needle-valve in needle-valve body centre bore, needle-valve body end face
First annular groove is provided with, centre bore waist is provided with the second annular groove, and three in first annular groove oil inlet passes through three
Lateral oil input channel is communicated with centre bore, and the needle-valve epimere positioned at the second annular groove top is closely slided with needle-valve body centre bore matches somebody with somebody
Close, the lower oil duct towards atomizer, needle-valve are formed between the needle-valve hypomere and needle-valve body centre bore of the second annular groove bottom
Cavity between pressure-bearing circular conical surface and the second annular groove that upper and lower section of junction is formed constitutes the pressure accumulation chamber of fuel injector；
The needle-valve body, which is located in the centre bore between the second annular groove and first annular groove, is provided with the 3rd annular groove, the described 3rd
Annular groove is connected with the lower port of three lateral oil input channels；
The needle-valve epimere both sides are provided with mutually symmetrical vertical flat position, and vertical flat position up extends to needle-valve from pressure-bearing circular conical surface
Epimere waist and with needle-valve epimere is cylindrical constitutes flat step, the position of flat step is at the upper ring cutting face of the 3rd annular groove, pin
Gap between the vertical flat position of valve epimere both sides and needle-valve body centre bore, which is constituted, connects the 3rd annular groove and the second annular groove
Vertical oil input channel.
Its further technical scheme is：
The cross-sectional area of the cross-sectional area sum of the vertical flat position of the needle-valve epimere both sides and three lateral oil input channels it
With close to or it is equal.
Due to taking above technical scheme, a kind of Performance of Fuel Injection Nozzle of the present invention has the advantages that：
1. because the present invention is provided with the 3rd annular groove, pin in the centre bore between the first annular groove of needle-valve body and the second annular groove
Valve epimere both sides are vertically provided with mutually symmetrical vertical flat position, form the gap vertically between flat position and needle-valve body centre bore
The vertical oil input channel of the 3rd annular groove and the second annular groove is connected, the gap between needle-valve and needle-valve body is on the one hand added, separately
On the one hand lateral oil input channel connects first annular groove and the 3rd annular groove, and it is straight after lateral oil input channel is flowed into, not to make diesel oil
Up to pressure accumulation chamber, but first reach the 3rd annular groove and reach pressure accumulation chamber by vertical oil input channel again, so as to increase needle-valve and needle-valve
The lubrication of body, reducing even prevents that firing well cuts occurs the stuck phenomenon of needle-valve, so that ensure the normal work of fuel injector,
It is particularly suitable for use in the fuel injector of those diesel engines for often occurring needle-valve stuck phenomenon；
2. further, since diesel oil is after three lateral oil input channels, pressure accumulation chamber need to be reached again by vertical oil input channel, so as to increase
Plus the contact area of [A1] diesel oil and needle-valve and needle-valve body, a part of heat is taken away by the diesel oil of flowing, can be to a certain degree
The temperature of the upper whole pintle nozzle match-ing parts of reduction, reduces influence of the thermal stress to pintle nozzle match-ing parts；
3. cross-sectional area sum and the cross section of three lateral oil input channels due to the vertical flat position of the needle-valve epimere both sides
Area sum close to or it is equal, i.e., the cross-sectional area of the cross-sectional area sum of vertical oil input channel and three lateral oil input channels it
With it is equal, thus will not due to oil duct sectional area change bring the pressure loss, needle-valve makes the pressure-bearing conical surface due to having opened vertical flat position
Area changes, and the open and close pressure of fuel injector can be adjusted by adjusting the pretightning force of spring, makes fuel injector normal work.
A kind of technical characteristic of Performance of Fuel Injection Nozzle of the present invention is further described with reference to the accompanying drawings and examples.
Brief description of the drawings
Fig. 1 is a kind of Performance of Fuel Injection Nozzle structural representation of the present invention；
Fig. 2~Fig. 3 is needle valve structure schematic diagram：
Fig. 2 is front view, and Fig. 3 is Fig. 2 top view；
Fig. 4~Fig. 7 is needle valve structure schematic diagram：
Fig. 4 is front view, and Fig. 5 is Fig. 4 left view, and Fig. 6 is Fig. 4 top view, and Fig. 7 is Fig. 4 A-A views；
Fig. 8 is existing Performance of Fuel Injection Nozzle structural representation；
Fig. 9~Figure 10 is existing needle valve structure schematic diagram；
Fig. 9 is front view, and Figure 10 is Fig. 9 top view；
Figure 11 is existing needle valve structure schematic diagram；
In Fig. 1~Fig. 7：
1-needle-valve body, 11-centre bore, 12-first annular groove, 121-pressure accumulation chamber, 13-lateral oil input channel, the 14-the three ring
Shape groove, the 15-the second annular groove, 16-vertical oil input channel, 17-lower oil duct, 18-atomizer, 2-needle-valve, 20-dome platform,
21-needle-valve epimere, 211-vertical flat position, 212-flat step, 22-needle-valve hypomere, 23-pressure-bearing circular conical surface,
The thickness of d-vertical flat position；
In Fig. 8~Figure 11：
3-needle-valve body, 31-centre bore, 32-first annular groove, 341-pressure accumulation chamber, 33-lateral oil input channel, the 34-the second ring
Shape groove, 35-lower oil duct, 36-atomizer, 4-needle-valve, 40-dome platform, 41-needle-valve epimere, 42-needle-valve hypomere, 43-
Pressure-bearing circular conical surface.
Embodiment
A kind of Performance of Fuel Injection Nozzle, including needle-valve body 1 and cooperation are arranged on the needle-valve 2 in needle-valve body centre bore 11, pin
Valve body end face is provided with first annular groove 12, and centre bore waist is provided with the second annular groove 15,（First annular groove and the second annular groove its
Planar annular is axially vertical with centre bore）, three oil inlets in first annular groove pass through three lateral oil input channels 13
Communicated with centre bore, needle-valve epimere 21 and the needle-valve body centre bore positioned at the second annular groove top are closely slidably matched, positioned at
Formed between the needle-valve hypomere 22 and needle-valve body centre bore of second ring groove bottom on the lower oil duct 17 towards atomizer 18, needle-valve,
Cavity between the annular groove of pressure-bearing circular conical surface 23 and second that hypomere junction is formed constitutes the pressure accumulation chamber 121 of fuel injector；
The needle-valve body 1, which is located in the centre bore between the second annular groove 15 and first annular groove 12, is provided with the 3rd annular groove 14,
（Its planar annular and centre bore are axially vertical）, the 3rd annular groove connects with the lower port of three articles of lateral oil input channels 13；
The both sides of needle-valve epimere 21 are provided with mutually symmetrical vertical flat position 211, and vertical flat position is up prolonged from pressure-bearing circular conical surface 23
Extend needle-valve epimere waist and with needle-valve epimere is cylindrical constitutes flat step 212, the position of flat step is in the 3rd annular groove 14
At upper ring cutting face（That is the upper end of the 3rd annular groove 14）, between the vertical flat position of needle-valve epimere both sides and needle-valve body centre bore between
Gap constitutes the vertical oil input channel 16 of two articles of the 3rd annular grooves 14 of connection and the second annular groove 15.
The cross-sectional area sum of the vertical flat position of the needle-valve epimere both sides（It is also two vertical cross sections of oil input channel 16
Area sum）Cross-sectional area sum with three lateral oil input channels 13 is close or equal（Therefore will not be due to oil duct sectional area
Change brings the pressure loss）.
Note：The cross-sectional area of two vertical flat positions is：Cross section face of the needle-valve epimere without vertical flat position position cylinder
Product subtracts the cross-sectional area of the vertical flat position position cylinder of needle-valve epimere band.
Claims (2)
1. a kind of Performance of Fuel Injection Nozzle, including needle-valve body（1）Needle-valve body centre bore is arranged on coordinating（11）Interior needle-valve
（2）, needle-valve body end face is provided with first annular groove（12）, centre bore waist is provided with the second annular groove（15）, positioned at first annular groove
Three interior oil inlets pass through three lateral oil input channels（13）Communicated with centre bore, the needle-valve epimere positioned at the second annular groove top
（21）Closely it is slidably matched with needle-valve body centre bore, the needle-valve hypomere positioned at the second annular groove bottom（22）With needle-valve body centre bore
Between formed lead to atomizer（18）Lower oil duct（17）, the pressure-bearing circular conical surface that upper and lower section of junction of needle-valve is formed（23）With
Cavity between second ring groove constitutes the pressure accumulation chamber of fuel injector（121）；
It is characterized in that：
The needle-valve body（1）Positioned at the second annular groove（15）With first annular groove（12）Between centre bore in be provided with the 3rd annular
Groove（14）, the 3rd annular groove and three articles of lateral oil input channels（13）Lower port connection；
The needle-valve epimere（21）Both sides are provided with mutually symmetrical vertical flat position（211）, vertical flat position is from pressure-bearing circular conical surface（23）
Up extend to needle-valve epimere waist and with needle-valve epimere is cylindrical constitutes flat step（212）, the position of flat step is in the 3rd ring
Shape groove（14）Upper ring cutting face at, gap between the vertical flat position of needle-valve epimere both sides and needle-valve body centre bore, which is constituted, connects the
Three annular grooves（14）With the second annular groove（15）Vertical oil input channel（16）.
2. a kind of Performance of Fuel Injection Nozzle as claimed in claim 1, it is characterised in that：The needle-valve epimere both sides it is vertical flat
Position（211）Cross-sectional area sum and three lateral oil input channels（13）Cross-sectional area sum close to or it is equal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017202912877 | 2017-03-23 | ||
| CN201720291287 | 2017-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107013392A true CN107013392A (en) | 2017-08-04 |
Family
ID=59452444
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720639287.1U Expired - Fee Related CN206860337U (en) | 2017-03-23 | 2017-06-05 | A kind of Performance of Fuel Injection Nozzle |
| CN201710431595.XA Pending CN107013392A (en) | 2017-03-23 | 2017-06-05 | A kind of Performance of Fuel Injection Nozzle |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720639287.1U Expired - Fee Related CN206860337U (en) | 2017-03-23 | 2017-06-05 | A kind of Performance of Fuel Injection Nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN206860337U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206860337U (en) * | 2017-03-23 | 2018-01-09 | 大连交通大学 | A kind of Performance of Fuel Injection Nozzle |
| CN108626049A (en) * | 2018-05-03 | 2018-10-09 | 哈尔滨工程大学 | The double oil pocket pintle nozzle match-ing parts of low speed machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030094517A1 (en) * | 2001-11-16 | 2003-05-22 | Masaaki Kato | Fuel injection nozzle |
| US20080290188A1 (en) * | 2007-05-22 | 2008-11-27 | International Engine Intellectual Property Company, Llc | Fuel injector needle housing |
| CN201407119Y (en) * | 2009-04-27 | 2010-02-17 | 江苏泗洪油嘴油泵有限公司 | Anti-locking fuel injection nozzle couple |
| CN102003320A (en) * | 2010-12-17 | 2011-04-06 | 无锡威孚长安有限责任公司 | Oil nozzle coupling part |
| CN106089530A (en) * | 2016-08-17 | 2016-11-09 | 江苏鑫田柴油机有限公司 | A kind of low inertia energy-saving type diesel engine fuel injector |
| CN106150820A (en) * | 2016-07-12 | 2016-11-23 | 江西汇尔油泵油嘴有限公司 | The method of disturbance diesel oil and atomizer |
| CN206860337U (en) * | 2017-03-23 | 2018-01-09 | 大连交通大学 | A kind of Performance of Fuel Injection Nozzle |
-
2017
- 2017-06-05 CN CN201720639287.1U patent/CN206860337U/en not_active Expired - Fee Related
- 2017-06-05 CN CN201710431595.XA patent/CN107013392A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030094517A1 (en) * | 2001-11-16 | 2003-05-22 | Masaaki Kato | Fuel injection nozzle |
| US20080290188A1 (en) * | 2007-05-22 | 2008-11-27 | International Engine Intellectual Property Company, Llc | Fuel injector needle housing |
| CN201407119Y (en) * | 2009-04-27 | 2010-02-17 | 江苏泗洪油嘴油泵有限公司 | Anti-locking fuel injection nozzle couple |
| CN102003320A (en) * | 2010-12-17 | 2011-04-06 | 无锡威孚长安有限责任公司 | Oil nozzle coupling part |
| CN106150820A (en) * | 2016-07-12 | 2016-11-23 | 江西汇尔油泵油嘴有限公司 | The method of disturbance diesel oil and atomizer |
| CN106089530A (en) * | 2016-08-17 | 2016-11-09 | 江苏鑫田柴油机有限公司 | A kind of low inertia energy-saving type diesel engine fuel injector |
| CN206860337U (en) * | 2017-03-23 | 2018-01-09 | 大连交通大学 | A kind of Performance of Fuel Injection Nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN206860337U (en) | 2018-01-09 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | 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 |
Application publication date: 20170804 |
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| WD01 | Invention patent application deemed withdrawn after publication |