CN107905931A - A kind of common-rail injector of no oil return - Google Patents
A kind of common-rail injector of no oil return Download PDFInfo
- Publication number
- CN107905931A CN107905931A CN201711037698.4A CN201711037698A CN107905931A CN 107905931 A CN107905931 A CN 107905931A CN 201711037698 A CN201711037698 A CN 201711037698A CN 107905931 A CN107905931 A CN 107905931A
- Authority
- CN
- China
- Prior art keywords
- oil
- injector body
- tight
- seat
- tight seat
- 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.)
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Classifications
-
- 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
- F02M61/02—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 of valveless type
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses the common-rail injector of no oil return,Including electromagnetic valve components,Oil injector body,The tight cap of solenoid valve,Control valve coupling,Tight seat,Flow control mechanism,Pressure regulation gasket,Pressure spring,Spring base,Intermediate mass,Injector nozzle matching parts,Tight cap,Electromagnetic valve components are arranged on the upper end of oil injector body,Control valve coupling,Tight seat,Flow control mechanism is arranged on the upper grooves of oil injector body,Pressure regulation gasket,Pressure spring and spring base are arranged on oil injector body lower recess,Intermediate mass upper surface coordinates with oil injector body lower face,Intermediate mass lower face coordinates with injector nozzle matching parts,The lower part of tight seat coordinates with flow control mechanism top,Flow control mechanism lower part coordinates with oil injector body upper grooves bottom wall,Tight seat is connected with oil injector body,Oil injector body is equipped with internal openings one between the bottom wall side of upper grooves and oil injector body lower face,In oil injector body internal openings two are equipped with close to the opposite side of bottom wall,Internal openings two are connected with the lower oil duct portion of tight seat.
Description
Technical field
The present invention relates to diesel engine fuel injection equipment technical field, more particularly to a kind of common-rail injector of no oil return.
Background technology
As emission regulation demands are more and more tighter, engine fuel injection system is progressively to electronic control system mistake
Cross, the core of common rail product is to realize that full Electrocontrolled high-pressure sprays by common-rail injector, the common-rail injector master of the prior art
To be made of control valve coupling, valve module and injector nozzle matching parts couples and electromagnetic valve components, four big components limit oil spout
The reduction of device length, also limit the scope of application of common-rail injector so that existing common-rail injector is sent out in small-power small size
It can not be arranged in motivation, the structure by varying existing common-rail injector is a kind of feasible method.
In addition, the shortcomings that prior art is that common-rail injector is big using control valve coupling, valve module and injector nozzle matching parts three
The combination of couple and electromagnetic valve components, minimum length are restricted in more than 200mm, use scope.The invention enables altogether
Rail injector minimum length can be applicable in (use) scope within 140mm, increase common-rail injector.
The valve module of the prior art is made of control sleeve and control piston, and the gap of the two is 2.5 μm, thick at cooperation
Rugosity franchise is 0.5 μm, and circularity franchise is 0.0005mm, and cylindricity franchise is 0.001mm, and requirement on machining accuracy is high, processes work
Sequence is more, high processing costs, and control sleeve needs electrical discharge machining into oil outlet, and long processing time is of high cost.The present invention makes
With traffic controller substitute valve module, it is not necessary to the inserting of control sleeve and control piston, the most tight end face of processing request it is coarse
It is only 0.4 μm to spend franchise, effectively reduces processing cost.
Prior art co-rail oil injection body need to process valve module mounting hole, and oil circuit arrangement is complicated.Present invention flow control
Plate substitutes valve module, and oil injector body need not process valve module mounting hole, reduce manufacturing procedure, reduces cutter loss and adds
Work cost.
Existing common-rail injector is opened and closed by the needle-valve in fluid power amplification principle indirect control injector nozzle matching parts, quiet
State recirculating oil quantity and dynamic recirculating oil quantity are larger, and in the case that especially in-orbit pressure request is higher and higher, the supply capability of pump is produced
Raw very big test, also increases the loss of common rail pump.The present invention directly controls needle-valve using solenoid valve and opens and closes, and does not have
Oil return, the requirement to oil pump feed ability substantially reduce, and common rail system is selected the oil pump of smaller.
Existing common-rail injector couple is more, and failure rate is higher.Wherein, injector nozzle matching parts and valve module belong to vulnerable part,
The maintenance cost of especially valve module is higher.The present invention substitutes valve module by traffic controller, effectively reduces co-rail oil injection
The failure rate of device, can save user cost.
The content of the invention
A kind of above-mentioned deficiency of the present invention aiming at prior art presence pair, there is provided common-rail injector of no oil return；This
Invention with traffic controller substitute valve module, it is simple in structure, by solenoid valve directly control spindle switch without oil return co-rail oil injection
Device, traffic controller is opened rapidly after solenoid valves, and high pressure oil is fed to injector nozzle matching parts makes fuel-oil atmozation, effectively reduces
The failure rate of common-rail injector, solves the problems, such as that the common-rail injector couple of the prior art is more, high failure rate, especially valve
The problem of maintenance cost of component is higher, reduces assembly cost, improves economic benefit.
The present invention solve technical problem technical solution be：
A kind of common-rail injector of no oil return, including the tight cap of electromagnetic valve components, oil injector body, solenoid valve, control valve coupling,
Tight seat, flow control mechanism, pressure regulation gasket, pressure spring, spring base, intermediate mass, injector nozzle matching parts, tight cap, electromagnetic valve components
Arranged on the upper end of oil injector body, fastened by the tight cap of solenoid valve and oil injector body；Control valve coupling, tight seat, flow control mechanism
Arranged on the upper grooves of oil injector body, pressure regulation gasket, pressure spring and spring base are arranged on the lower recess of oil injector body lower end, in
Between block upper surface and oil injector body lower face coordinate, intermediate mass lower face and injector nozzle matching parts cooperation, intermediate mass, injector nozzle matching parts
It is connected by tight cap with oil injector body lower end, lower part and the flow control mechanism top of tight seat coordinate, flow control mechanism lower part
Coordinate with the bottom wall of the upper grooves of oil injector body, tight seat is connected with oil injector body, bottom wall one of the oil injector body in upper grooves
The internal openings one of up/down perforation are equipped between side and oil injector body lower face, are equipped with oil injector body close to the opposite side of bottom wall
The internal openings two of up/down perforation, internal openings two are connected with the lower oil duct portion of tight seat.
The flow control mechanism includes traffic controller, briquetting, sealed spheroid, and the traffic controller axial centre is set
There is throttle orifice, throttle orifice lower openings are connected with the upper grooves of oil injector body, and circular cone is equipped among traffic controller upper surface
Connected in star, traffic controller upper surface outer rim coordinate with tight seat lower face outer fringe seal, and the upper opening of throttle orifice is less than circle
The circular conical surface of conical socket, circular conical surface and sealed spheroid coordinate, and briquetting lower part is equipped with spherical groove groove under briquetting, on sealed spheroid
Portion coordinates with lower spherical groove, and briquetting top and the spool lower end of control valve coupling coordinate.
Upper connecting portion that the tight seat includes being connected, lower oil duct portion, the outside diameter of upper connecting portion are more than the outer of lower oil duct portion
Footpath, upper connecting portion external cylindrical surface are connected with oil injector body endoporus by thread fitting, and spring groove, spring are equipped among tight seat top
Lower end is connected with spring trench bottom, and spring upper end is connected with spring base, and lower oil duct portion includes hanging down close to tight seat lower face position
The directly tight seat oil passage one in the valve core axis for controlling valve coupling, the tight seat oil passage parallel to the valve core axis for controlling valve coupling
Two, tight seat oil passage two positioned at the inner side of tight seat oil passage one close to control valve coupling axial location, the tight inner side of seat oil passage one with
Tight two upper vertical connection of seat oil passage, the lower ending opening of tight seat oil passage two is connected with cone-shaped groove, in internal openings two
Portion is connected with the tight outside of seat oil passage one, and two lower part of internal openings is connected with the intermediate mass oil passage of intermediate mass, and intermediate mass oil is logical
Road is connected with the injector nozzle matching parts oil passage on injector nozzle matching parts.
Beneficial effects of the present invention：
1. common-rail injector of the present invention substitutes valve module using flow control mechanism, solves the co-rail oil injection of the prior art
The problem of maintenance cost of the problem of device couple is more, and failure rate is higher, especially valve module is higher, reduces assembly cost；
Oil injector body be not required additional processing valve module mounting hole and oil return hole, make it is simple in structure, reduce manufacturing procedure, reduce cutter and
Lathe is lost, and processing cost is low, and the present invention substitutes valve module by traffic controller, effectively reduces the failure of common-rail injector
Rate, saves user cost, improves economic benefit.
2. fuel injector of the present invention is without oil return, in the case where fuel injector oil mass is identical, fuel injector of the present invention makes oil pump feed amount
50% is reduced, greatly reduces use cost.
3. the present invention is because oil injector body is simple in structure, oil duct arrangement is less, after oil injector body length shortens than the prior art
Common rail system oil spout function can just can be achieved；When fuel injector damages, injector nozzle matching parts or electromagnetic valve components are only needed to change, are tieed up
Repair conveniently, working service cost is low.
4. common-rail injector minimum length of the present invention can be applicable in (use) within 140mm, increase common-rail injector
Scope, it is that common-rail injector is even greatly using control valve coupling, valve module and injector nozzle matching parts three to solve the shortcomings that prior art
The combination of part and electromagnetic valve components, minimum length is in more than 200mm, the problem of use scope is restricted.
Brief description of the drawings
Fig. 1 structure charts 1 of the present invention are common-rail injector overall structure diagram of the present invention；
Fig. 2 is the partial enlarged view of Fig. 1.
Embodiment
For a better understanding of the present invention, embodiments of the present invention are explained in detail below in conjunction with the accompanying drawings.
With reference to Fig. 1, Fig. 2, the present invention relates to a kind of common-rail injector without valve module, without oil return, including solenoid valve
The tight cap 2 of component 1, oil injector body 6, solenoid valve, control valve coupling 3, tight seat 4, traffic controller 5, pressure regulation gasket 7, pressure spring
8th, spring base 9, intermediate mass 10, injector nozzle matching parts 12, tight cap 11.Electromagnetic valve components 1 are arranged on the upper end of oil injector body 6, pass through electricity
The tight cap 2 of magnet valve is fastened with oil injector body 6；Control the top that valve coupling 3, tight seat 4, flow control mechanism are arranged on oil injector body 6 recessed
Groove, pressure regulation gasket 7, pressure spring 8 and spring base 9 are arranged on the lower recess of 6 lower end of oil injector body, 10 upper surface of intermediate mass and spray
Oily 6 lower face of body coordinates, 10 lower face of intermediate mass and injector nozzle matching parts 12 coordinate, and intermediate mass 10, injector nozzle matching parts 12 pass through
Tight cap 11 is connected with 6 lower end of oil injector body, and lower part and the flow control mechanism top of tight seat 4 coordinate, flow control mechanism lower part
Coordinate with the bottom wall of the upper grooves 63 of oil injector body 6, tight seat 4 is connected with oil injector body 6, and oil injector body 6 is in upper grooves
The internal openings 1 of up/down perforation, internal openings 1 and oil inlet are equipped between 6 lower face of bottom wall side and oil injector body
64 connections, are equipped with the internal openings 2 62 of up/down perforation in oil injector body 6 close to the opposite side of bottom wall, internal openings 2 62 with it is tight
The lower oil duct portion connection of seat 4.
The flow control mechanism includes traffic controller 5, briquetting 13, sealed spheroid 14, and the traffic controller 5 is axial
Center is equipped with throttle orifice 51, and 51 lower openings of throttle orifice are connected with the upper grooves 63 of oil injector body 6,5 upper end of traffic controller
Cone-shaped groove 52 is equipped among face, 5 upper surface outer rim of traffic controller coordinates with tight 4 lower face outer fringe seal of seat, throttle orifice
51 upper opening is the circular conical surface less than cone-shaped groove 52, and circular conical surface coordinates with sealed spheroid, and 13 lower part of briquetting is equipped with pressure
Spherical groove groove under block, sealed spheroid top coordinate with lower spherical groove, 13 top of briquetting and the spool lower end of control valve coupling 3
Coordinate,
Upper connecting portion that the tight seat 4 includes being connected, lower oil duct portion, the outside diameter of upper connecting portion are more than the outer of lower oil duct portion
Footpath, upper connecting portion external cylindrical surface are connected with 6 endoporus of oil injector body by thread fitting, and spring groove 17 is equipped among tight 4 top of seat,
16 lower end of spring is connected with spring trench bottom, and spring upper end is connected with spring base 15, and lower oil duct portion is included close to tight 4 lower face of seat
The tight seat oil passage 1 of the valve core axis perpendicular to control valve coupling 3 of position, the valve core axis parallel to control valve coupling 3
Tight seat oil passage 2 42, tight seat oil passage 2 42 positioned at the inner side of tight seat oil passage 1 close to control 3 axial location of valve coupling,
Tight one 41 inner side of seat oil passage is connected with tight 2 42 upper vertical of seat oil passage, the lower ending opening and circular cone of tight seat oil passage 2 42
Connected in star 52 connects, and 2 62 top of internal openings is connected with the tight outside of seat oil passage 1,2 62 lower part of internal openings and centre
The intermediate mass oil passage 101 of block 10 connects, intermediate mass oil passage 101 and the injector nozzle matching parts oil passage on injector nozzle matching parts 12
121 connections.
10 one end of intermediate mass is contacted with 6 face of oil injector body, and the other end is contacted with 12 face of injector nozzle matching parts, is twisted by tight cap 11
Tightly, 12 three's firm contact of oil injector body 6, intermediate mass 10 and injector nozzle matching parts is made.12 other end of injector nozzle matching parts stretches out tight cap
Outside 11.Common-rail injector of the present invention substitutes valve module with a traffic controller 5 so that assembly cost reduction；Oil injector body 6
Additional processing valve module mounting hole and oil return hole is not required, makes simple in structure, reduction manufacturing procedure, reduces cutter and lathe damages
Consumption, processing cost are low；Fuel injector of the present invention is without oil return, and in the case where fuel injector oil mass is identical, fuel injector of the present invention supplies pump
Oil mass reduces by 50%；The present invention is because oil injector body is simple in structure, and oil duct arrangement is less, and oil injector body length is most as short as 140mm i.e.
Common rail system oil spout function can be achieved；When fuel injector damages, injector nozzle matching parts or electromagnetic valve components, maintenance side are only needed to change
Just.
Although embodiment that the present invention has shown that and the invention has been described, for those of ordinary skill in the art, can with
These can be applied in the case where not departing from the principle of the present invention and spirit example by, which understanding, carries out a variety of change, modification, replacement and modification, all
Belong to stating within claims for the present invention.
Claims (3)
1. a kind of common-rail injector of no oil return, it is characterized in that, including the tight cap of electromagnetic valve components, oil injector body, solenoid valve, control
Valve coupling, tight seat, flow control mechanism, pressure regulation gasket, pressure spring, spring base, intermediate mass, injector nozzle matching parts, tight cap, electromagnetism
Valve member is arranged on the upper end of oil injector body, is fastened by the tight cap of solenoid valve and oil injector body；Control valve coupling, tight seat, flow control
Mechanism processed is arranged on the upper grooves of oil injector body, and pressure regulation gasket, pressure spring and spring base are arranged on the lower part of oil injector body lower end
Groove, intermediate mass upper surface coordinates with oil injector body lower face, intermediate mass lower face and injector nozzle matching parts coordinate, intermediate mass, spray
Oil nozzle couple is connected by tight cap with oil injector body lower end, and lower part and the flow control mechanism top of tight seat coordinate, flow control
The bottom wall of the upper grooves of mechanism lower part and oil injector body coordinates, and tight seat is connected with oil injector body, and oil injector body is in upper grooves
Bottom wall side and oil injector body lower face between be equipped with up/down perforation internal openings one, in oil injector body close to the another of bottom wall
Side is equipped with the internal openings two of up/down perforation, and internal openings two are connected with the lower oil duct portion of tight seat.
2. a kind of common-rail injector of no oil return as claimed in claim 1, it is characterized in that, the flow control mechanism includes stream
Control panel, briquetting, sealed spheroid are measured, the traffic controller axial centre is equipped with throttle orifice, throttle orifice lower openings and oil spout
The upper grooves connection of body, is equipped with cone-shaped groove among traffic controller upper surface, traffic controller upper surface outer rim and
Tight seat lower face outer fringe seal coordinates, and the upper opening of throttle orifice is the circular conical surface less than cone-shaped groove, circular conical surface and sealing
Sphere coordinates, and briquetting lower part is equipped with spherical groove groove under briquetting, and sealed spheroid top and lower spherical groove coordinate, briquetting top with
The spool lower end of valve coupling is controlled to coordinate.
3. a kind of common-rail injector of no oil return as claimed in claim 2, it is characterized in that, the tight seat includes being connected upper
Connecting portion, lower oil duct portion, the outside diameter of upper connecting portion are more than the outside diameter in lower oil duct portion, upper connecting portion external cylindrical surface with oil injector body
Hole is connected by thread fitting, and spring groove is equipped among tight seat top, and lower spring end is connected with spring trench bottom, spring upper end and
Spring base connects, and lower oil duct portion includes the tight seat oil of the valve core axis perpendicular to control valve coupling close to tight seat lower face position
Passage one, the tight seat oil passage two parallel to the valve core axis for controlling valve coupling, tight seat oil passage two are located at tight seat oil passage one
Inner side is connected close to control valve coupling axial location, the tight inner side of seat oil passage one with tight two upper vertical of seat oil passage, tight seat oil
The lower ending opening of passage two is connected with cone-shaped groove, and two top of internal openings is connected with the tight outside of seat oil passage one, and inside is opened
Two lower part of hole is connected with the intermediate mass oil passage of intermediate mass, and intermediate mass oil passage and the injector nozzle matching parts oil on injector nozzle matching parts are logical
Road connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711037698.4A CN107905931B (en) | 2017-10-30 | 2017-10-30 | Common rail oil injector without oil return |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711037698.4A CN107905931B (en) | 2017-10-30 | 2017-10-30 | Common rail oil injector without oil return |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107905931A true CN107905931A (en) | 2018-04-13 |
| CN107905931B CN107905931B (en) | 2020-04-17 |
Family
ID=61842964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711037698.4A Active CN107905931B (en) | 2017-10-30 | 2017-10-30 | Common rail oil injector without oil return |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107905931B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139319A (en) * | 2018-09-27 | 2019-01-04 | 中国重汽集团重庆燃油喷射系统有限公司 | A kind of common-rail injector |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1969120A (en) * | 2004-06-03 | 2007-05-23 | 博世株式会社 | Fuel injection valve |
| CN101251068A (en) * | 2008-03-21 | 2008-08-27 | 北京理工大学 | Valve core type high pressure co-rail electric-controlled oil ejector |
| US20080295805A1 (en) * | 2005-11-15 | 2008-12-04 | Fev Motorentechnik Gmbh | High Pressure Fuel Injector |
| CN103644061A (en) * | 2013-12-05 | 2014-03-19 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Self-relieving non-return-oil oil atomizer and refitting method of same |
| CN104775954A (en) * | 2015-03-27 | 2015-07-15 | 中国北方发动机研究所(天津) | Oil-return-free common-rail injector controlled by electromagnetic valve |
-
2017
- 2017-10-30 CN CN201711037698.4A patent/CN107905931B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1969120A (en) * | 2004-06-03 | 2007-05-23 | 博世株式会社 | Fuel injection valve |
| US20080295805A1 (en) * | 2005-11-15 | 2008-12-04 | Fev Motorentechnik Gmbh | High Pressure Fuel Injector |
| CN101251068A (en) * | 2008-03-21 | 2008-08-27 | 北京理工大学 | Valve core type high pressure co-rail electric-controlled oil ejector |
| CN103644061A (en) * | 2013-12-05 | 2014-03-19 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Self-relieving non-return-oil oil atomizer and refitting method of same |
| CN104775954A (en) * | 2015-03-27 | 2015-07-15 | 中国北方发动机研究所(天津) | Oil-return-free common-rail injector controlled by electromagnetic valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139319A (en) * | 2018-09-27 | 2019-01-04 | 中国重汽集团重庆燃油喷射系统有限公司 | A kind of common-rail injector |
| CN109139319B (en) * | 2018-09-27 | 2023-09-29 | 重油高科电控燃油喷射系统(重庆)有限公司 | Common rail fuel injector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107905931B (en) | 2020-04-17 |
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Effective date of registration: 20210914 Address after: 265718 No. 51, Xingyu Road, Longkou high tech Industrial Park, Yantai City, Shandong Province Patentee after: LONGKOU LONGBENG DIESEL OIL INJECTION HIGH-TECH Co.,Ltd. Address before: 264006 No. 1 Yanhe Road, Longkou City East Street, Yantai, Shandong Patentee before: LONGKOU LONGBENG FUEL INJECTION Co.,Ltd. |