CN106640452A - Special oil injection device for highpressure common rail - Google Patents
Special oil injection device for highpressure common rail Download PDFInfo
- Publication number
- CN106640452A CN106640452A CN201611192120.1A CN201611192120A CN106640452A CN 106640452 A CN106640452 A CN 106640452A CN 201611192120 A CN201611192120 A CN 201611192120A CN 106640452 A CN106640452 A CN 106640452A
- Authority
- CN
- China
- Prior art keywords
- common rail
- control
- oil
- control piston
- oil injection
- 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
-
- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
-
- 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
-
- 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
-
- 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
- F02M61/166—Selection of particular materials
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/09—Fuel-injection apparatus having means for reducing noise
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to the technical field of oil injection for vehicle high pressure common rail, in particular to a special oil injection device for highpressure common rail. The device comprises a control piston and an oil injection device body. The control piston, the oil injection device body and a porous plate form a high temperature common rail control cavity. According to the special oil injection device for highpressure common rail, through the reasonable design of the porous plate bottom surface and the control of the shape of the piston top portion, when the oil injection device sprays oil, a throttling ring belt is formed at the bottom surface of the control piston and the porous plate to create an throttling effect, thus the dynamic oil return of the oil injection device is greatly decreased, the heating of the oil injection device is reduced, the power loss of a oil supply pump is reduced. At the same time, the precise design of the throttling ring belt clearance between the porous plate and the control piston head part can make the piston be at a complete floating condition after the piston is completely lifted, therefore hydraulic pressure balance automatic floating regulation is used for controlling the throttling ring clearance between the control piston and the porous plate bottom surface, thus the difference of high pressure common rail control cavity pressure caused by the difference of throttling ring belt clearance derived from assembly errors is reduced, and the assembly consistency of the oil injection device is improved.
Description
Technical field
The present invention relates to automobile high-pressure common rail oil injection technical field, more particularly to a kind of special fueling injection equipment of high-pressure common rail.
Background technology
In order to meet increasingly strict Abgasgesetz, the injection pressure more and more higher of fuel system.With injection pressure
Improve, the dynamic oil return of fuel injector is also increasing.Fuel injector dynamic recirculating oil quantity increases, and will increase the energy ezpenditure of oil feed pump,
Reduce the economy of fuel system.Simultaneously more high pressure fuel leaks will cause fuel injector mesolow oil in low pressure oil way
Road temperature is higher, and then affects stability, the reliability of fuel injector work.Additionally, from the operation principle of fuel injector, oil spout
Device is rising or falling by the fuel pressure in control control chamber, so as to control the control of fuel oil injector by pressure differential
Piston up and down motion vertically.In order to reduce the injection delay of fuel injector in the design of fuel injector, can be by fuel injector oil pump capacity
The ratio of hole and the design of oil-feed metering-orifice flow-rate ratio is larger.This makes the amplitude of the intermediate fuel oil reduced pressure of control chamber larger, so as to cause
In end of injection, the fuel pressure in control chamber recovers relatively slow, and fuel injector closing delay is longer, causes fuel injector oil spout sensitive
Property be deteriorated, limit the raising of fuel injector multi-injection ability.
Therefore, in order to solve the above problems, it is badly in need of a kind of special fueling injection equipment of new high-pressure common rail of invention.
The content of the invention
It is an object of the invention to：There is provided a kind of by constituting restrictor ring band in control piston and orifice plate bottom surface, realize
Reduce fuel injector while fuel injector dynamic oil return is greatly reduced and close delay, and then improve fuel injector oil spout sensitivity.
The invention provides following proposal：
A kind of special fueling injection equipment of high-pressure common rail, including control piston, oil injector body and orifice plate, the control piston, institute
State oil injector body and the orifice plate constitutes high-pressure common rail control chamber；Formed between the control top land and the orifice plate bottom surface
Fit-up gap, the oil injector body includes needle-valve, between formation needle-valve is spacing between the top of the needle-valve and the oil injector body
Gap；The orifice plate bottom surface is provided with the conduction hole communicated with fuel-displaced metering-orifice, and the high-pressure common rail control chamber top is provided with oil inlet quantity
Hole；In fuel injector injection process, after the control piston rises, restrictor ring band is constituted in control top land and orifice plate bottom surface,
Restriction effect is produced, so as to fuel injector dynamic oil return is greatly reduced；With the spout hole on the outer surface of the control piston
Inner surface on be equipped with foamed aluminium/nickel foam heat conduction noise reduction layer.
Preferably, it is described to control top land for circular arc.
Preferably, the control top land circular arc is with diameter greater than control piston diameter 3 times.
Preferably, it is described to control top land for isosceles trapezoid.
Preferably, the trapezoidal minor face of the control top land is less than drainage bore dia.
Preferably, fit-up gap is less than between needle-valve top and oil injector body between the control top land and orifice plate bottom surface
Spacing 0～the 0.02mm of gap of needle-valve.
Preferably, after control piston rises completely, control piston and orifice plate bottom surface are adjusted by hydro-cushion automatic floating
Between restrictor ring band gap.
Preferably, fuel-displaced metering-orifice and oil-feed metering-orifice flow-rate ratio are 1.3～1.8.
The beneficial effect that the present invention is produced：
The special fueling injection equipment of high-pressure common rail disclosed in this invention, by appropriate design orifice plate bottom surface and control top land
Shape, when fuel injector oil spout, in control piston and orifice plate bottom surface restrictor ring band is formed, and restriction effect is produced, so as to significantly
Fuel injector dynamic oil return is reduced, fuel injector heating is reduced, fuel feeding power loss of pump is reduced.Simultaneously careful design orifice plate bottom surface and
Restrictor ring band gap between control piston crown, is in complete quick condition after piston is risen completely.And then by hydraulic flat
Weighing apparatus automatic floating adjusts the throttling czermak space between control piston and orifice plate bottom surface, so as to reduce because rigging error restrictor ring band
Control chamber pressure gap caused by gap is different, and then improve fuel injector assembling uniformity.Control chamber is because fuel-displaced metering-orifice, control
The collective effect of the restrictor ring band between piston and orifice plate bottom surface can make control chamber keep higher pressure, when magnetic valve power-off with
Afterwards, control cavity pressure to recover faster, oil spout closing delay is shorter, improves fuel injector oil spout sensitivity.Fuel-displaced metering-orifice and enter
Oil mass hole flow-rate ratio can suitably increase, and so as to reduce fuel injector the injection delay for postponing to reduce simultaneously is closed.
Description of the drawings
Fig. 1 is the structural representation of the special fueling injection equipment of high-pressure common rail of the present invention；
Fig. 2 control piston liters open rear partial schematic diagram.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described reality
It is a part of embodiment of the invention to apply example, rather than the embodiment of whole.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to description the present invention and simplify description, rather than indicate or imply indication device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Referring to shown in Fig. 1 and Fig. 2, the control piston 7 of fuel injector, oil injector body 6, orifice plate 11 define control chamber 13.Spray
Oily device is rising or falling by the fuel pressure in control control chamber 13, and then by pressure differential control control piston 7 edge
The up and down motion of axial direction, so as to control the motion control injection process of needle-valve 1.By reducing the top of control piston 7 and the bottom of orifice plate 11
Fit-up gap 8 between face, when fuel injector oil spout, after control piston 7 rises, between the top of control piston 7 and the face of orifice plate bottom 11
Restrictor ring band 15 is formed, generation restriction effect realizes and fuel injector dynamic oil return is greatly reduced.In order to preferably play control
The restriction effect in gap between the top of piston 7 and orifice plate 11, it is to avoid control piston 7 blocks oil-feed metering-orifice 12 after rising, control is lived
7, plug top is circular arc or for trapezoidal, and more than 3 times of the control diameter of piston 7, trapezoidal minor face is less than conduction hole 9 to arc diameter
Diameter.From the operation principle of fuel injector, turnover metering-orifice flow-rate ratio is opened to fuel injector, closing performance impact is very big.This
In bright, while fuel-displaced metering-orifice 10 plays throttling action, between the top of control piston 7 and the bottom surface of orifice plate 11 restrictor ring is also devised
Band 15, plays throttling action, and this will cause control chamber 13 to keep higher fuel pressure.After magnetic valve power-off, control chamber
Pressure is higher, and what it recovered will faster, and oil spout closing delay is shorter, improves fuel injector oil spout sensitivity.So in fuel injector
The design initial stage can be relatively bigger by the fuel-displaced metering-orifice 10 of fuel injector and the design of the flow-rate ratio of oil-feed metering-orifice 12, rise to 1.3～
1.8, make fuel injector reduce reduction unlatching while closing delay and postpone.
The rule of the change of the intermediate fuel oil pressure of control chamber 13 determines the distributive value of fuel injector fuel oil, fuel injector control piston
Throttling annulus gap is very big to dynamic recirculating oil quantity, oil spout closing delayed impact between 7 tops and the bottom surface of orifice plate 11.In order to reduce because
The control difference of cavity pressure 13 caused by 15 gaps of rigging error restrictor ring band are different, and then improve fuel injector assembling uniformity.Will
Fit-up gap 8 makes control piston 7 complete less than the 0～0.02mm in the spacing gap 4 of needle-valve between control top land and orifice plate bottom surface
Complete quick condition is in after rise, the throttling between control piston 7 and the bottom surface of orifice plate 1 is adjusted by hydro-cushion automatic floating
The gap of annulus 15.
In the present embodiment, the foamed aluminium and its alloy light weight with sound-absorbing, heat-insulated, vibration damping, absorb impact energy and electromagnetism
The characteristics such as ripple；Nickel foam due to the air hole structure that has connection and the high porosity, therefore with high aeration, high-specific surface area and
Capillary force, more as functional material, for making fluid filter, atomizer, catalyst converter, battery electrode plate and heat exchanger
Deng.
The special fueling injection equipment of high-pressure common rail described in the present embodiment, by appropriate design orifice plate bottom surface and control top land
Shape, when fuel injector oil spout, in control piston and orifice plate bottom surface restrictor ring band is formed, and restriction effect is produced, so as to significantly
Fuel injector dynamic oil return is reduced, fuel injector heating is reduced, fuel feeding power loss of pump is reduced.Simultaneously careful design orifice plate bottom surface and
Restrictor ring band gap between control piston crown, is in complete quick condition after piston is risen completely.And then by hydraulic flat
Weighing apparatus automatic floating adjusts the throttling czermak space between control piston and orifice plate bottom surface, so as to reduce because rigging error restrictor ring
Control chamber pressure gap caused by band gap is different, and then improve fuel injector assembling uniformity.Control chamber is because fuel-displaced metering-orifice, control
The collective effect of the restrictor ring band between piston processed and orifice plate bottom surface can make control chamber keep higher pressure, when magnetic valve power-off
After, control cavity pressure recovers faster, and oil spout closing delay is shorter, improves fuel injector oil spout sensitivity.Fuel-displaced metering-orifice and
Oil-feed metering-orifice flow-rate ratio can suitably increase, and so as to reduce fuel injector the injection delay for postponing to reduce simultaneously is closed.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, either which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technology of appropriate technical solution
The scope of scheme.
Claims (8)
1. the special fueling injection equipment of a kind of high-pressure common rail, it is characterised in that：Including control piston, oil injector body and orifice plate, the control
Piston processed, the oil injector body and the orifice plate constitute high-pressure common rail control chamber；In the control top land and the orifice plate
Fit-up gap is formed between bottom surface, the oil injector body includes needle-valve, is formed between the top of the needle-valve and the oil injector body
The spacing gap of needle-valve；The orifice plate bottom surface is provided with the conduction hole communicated with fuel-displaced metering-orifice, the high-pressure common rail control chamber top
It is provided with oil-feed metering-orifice；In fuel injector injection process, after the control piston rises, constitute in control top land and orifice plate bottom surface
Restrictor ring band, produces restriction effect, so as to fuel injector dynamic oil return is greatly reduced；It is described control piston outer surface on and institute
State and be equipped with the inner surface of spout hole foamed aluminium/nickel foam heat conduction noise reduction layer.
2. the special fueling injection equipment of high-pressure common rail according to claim 1, it is characterised in that：It is described to control top land for circle
Arc.
3. the special fueling injection equipment of high-pressure common rail according to claim 2, it is characterised in that：The control top land circular arc
Shape is with diameter greater than control piston diameter 3 times.
4. the special fueling injection equipment of high-pressure common rail according to claim 3, it is characterised in that：It is described control top land for etc.
Waist is trapezoidal.
5. the special fueling injection equipment of high-pressure common rail according to claim 4, it is characterised in that：The control top land is trapezoidal
Minor face be less than drainage bore dia.
6. the special fueling injection equipment of high-pressure common rail according to claim 5, it is characterised in that：The control top land and hole
Fit-up gap is less than the spacing 0～0.02mm of gap of needle-valve between needle-valve top and oil injector body between plate bottom surface.
7. the special fueling injection equipment of high-pressure common rail according to claim 6, it is characterised in that：After control piston rises completely,
Restrictor ring band gap between control piston and orifice plate bottom surface is adjusted by hydro-cushion automatic floating.
8. the special fueling injection equipment of high-pressure common rail according to claim 7, it is characterised in that：Fuel-displaced metering-orifice and oil-feed metering-orifice stream
Amount is than being 1.3～1.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611192120.1A CN106640452A (en) | 2016-12-21 | 2016-12-21 | Special oil injection device for highpressure common rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611192120.1A CN106640452A (en) | 2016-12-21 | 2016-12-21 | Special oil injection device for highpressure common rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106640452A true CN106640452A (en) | 2017-05-10 |
Family
ID=58834738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611192120.1A Pending CN106640452A (en) | 2016-12-21 | 2016-12-21 | Special oil injection device for highpressure common rail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106640452A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397728A (en) * | 2001-07-16 | 2003-02-19 | 株式会社博世汽车系统 | Nozzle needle valve control structure of fuel shooting valve |
| DE102004060462A1 (en) * | 2004-12-16 | 2006-03-23 | Daimlerchrysler Ag | Fuel injection device for internal combustion engine has damping elements of metal foam accommodated at respective connecting points between injector and cylinder head and between fuel rail and injector |
| CN102084118A (en) * | 2008-01-23 | 2011-06-01 | 卡特彼勒公司 | Fuel injector and method of assembly therefor |
| CN102364080A (en) * | 2011-11-22 | 2012-02-29 | 哈尔滨工程大学 | Multistage throttling pressure-stabilizing electric control fuel injector |
| CN202284511U (en) * | 2011-10-24 | 2012-06-27 | 联合汽车电子有限公司 | Filter screen structure for oil injector used in gasoline direct injection engine |
| JP2013139712A (en) * | 2011-12-28 | 2013-07-18 | Nippon Soken Inc | Fuel injection valve |
| CN104033299A (en) * | 2014-06-19 | 2014-09-10 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Common-rail oil sprayer |
| CN105673282A (en) * | 2016-04-08 | 2016-06-15 | 龙口龙泵燃油喷射有限公司 | Pressure-balanced valve type common-rail fuel injector |
-
2016
- 2016-12-21 CN CN201611192120.1A patent/CN106640452A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397728A (en) * | 2001-07-16 | 2003-02-19 | 株式会社博世汽车系统 | Nozzle needle valve control structure of fuel shooting valve |
| DE102004060462A1 (en) * | 2004-12-16 | 2006-03-23 | Daimlerchrysler Ag | Fuel injection device for internal combustion engine has damping elements of metal foam accommodated at respective connecting points between injector and cylinder head and between fuel rail and injector |
| CN102084118A (en) * | 2008-01-23 | 2011-06-01 | 卡特彼勒公司 | Fuel injector and method of assembly therefor |
| CN202284511U (en) * | 2011-10-24 | 2012-06-27 | 联合汽车电子有限公司 | Filter screen structure for oil injector used in gasoline direct injection engine |
| CN102364080A (en) * | 2011-11-22 | 2012-02-29 | 哈尔滨工程大学 | Multistage throttling pressure-stabilizing electric control fuel injector |
| JP2013139712A (en) * | 2011-12-28 | 2013-07-18 | Nippon Soken Inc | Fuel injection valve |
| CN104033299A (en) * | 2014-06-19 | 2014-09-10 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Common-rail oil sprayer |
| CN105673282A (en) * | 2016-04-08 | 2016-06-15 | 龙口龙泵燃油喷射有限公司 | Pressure-balanced valve type common-rail fuel injector |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170510 |
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| WD01 | Invention patent application deemed withdrawn after publication |