CN101871411B - Modularized electric unit pump - Google Patents
Modularized electric unit pump Download PDFInfo
- Publication number
- CN101871411B CN101871411B CN2010101972479A CN201010197247A CN101871411B CN 101871411 B CN101871411 B CN 101871411B CN 2010101972479 A CN2010101972479 A CN 2010101972479A CN 201010197247 A CN201010197247 A CN 201010197247A CN 101871411 B CN101871411 B CN 101871411B
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- plunger
- electromagnet
- solenoid valve
- pump
- armature
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- Magnetically Actuated Valves (AREA)
Abstract
The invention aims to provide a modularized electronic unit pump (EUP), comprising a magnetic valve, a position connection part and a plunger pressure part; the magnetic valve comprises a valve body, an electromagnet, an electromagnet fill block, an armature and a control valve stem; the electromagnet is installed in an electromagnet housing which is connected with the valve body through the electromagnet fill block; the control valve rod is installed in the valve body, the armature is respectively connected with the control valve rod and the electromagnet; the position connection part comprises a closed hole plate and a position pin; the plunger pressure part comprises a pump body, a plunger, a plunger spring, a tappet and an idler wheel; the plunger is installed in the pump body and is connected with the pump body through the plunger sleeve; a plunger spring is installed outside of the plunger; one end of the plunger is connected with the tappet connected with the idler wheel; and the electromagnet and the plunger pressure part are connected with the position pin together through the sealing hole plate. The invention can reduce the production, assembly and maintenance cost, and improve the consistency and convenience of EUP products.
Description
Technical field
What the present invention relates to is a kind of fuel injection apparatus that is used for engine fuel injection system.
Background technique
Under the dual-pressure of energy shortage and environmental pollution, domestic in recent years each diesel engine manufacturer has accelerated the paces of the updating and upgrading of a product one after another.And in many fuel injection systems, electronically controlled unit pump is simple with its structural type, fuel qualities relative insensitivity and reliability advantages of higher have been obtained application more and more widely at home.Electronically controlled unit pump mainly is made up of the high-speed electromagnetic valve of the plunger coupled parts of being responsible for the fuel oil pressures partially and responsible fuel Injection Control part.The production model of present domestic electronically controlled unit pump is: at first cast unit pump body, then the pump housing is carried out processing, process plunger bushing thereon, the mounting hole of electromagnetic valve valve rod or valve pocket, advance, spill port, the structures such as mounting hole of monoblock pump and pump box are assembled plunger, piston spring, electromagnet, valve pocket, control valve rod, Returnning spring, armature and other accessory and the pump housing at last, thereby finish the production assembling work of whole monoblock pump.Wherein, the critical component electromagnet of solenoid valve and armature are responsible for the manufacturing by the manufacturer of specialty.There is following some deficiency in this production model, haves much room for improvement:
1, pump housing manufacturing cost height.Because the pump housing of electronically controlled unit pump is a cast inblock part, electromagnetic valve body and plunger bushing all process on the pump housing, with the pump housing be unified integral body, plunger assembly and electromagnetic valve component all need be installed on the pump housing, and precision-fit with it.Therefore the pump housing need carry out fine finishing, can constitute precision pair with control valve rod and plunger respectively, and this has increased the manufacturing cost of electronic unit pump body.
2, solenoid valve manufacture cost height.Solenoid valve is the High Accuracy Control device, and its each component are precision parts, need carry out fine finishing and accurate assembling, if each component of solenoid valve are responsible for manufacturing by different manufacturers respectively, can increase solenoid valve manufacture cost in process of production.
3, monoblock pump manufacture cost height.On the one hand, the manufacture cost height of the pump housing and solenoid valve has increased the manufacture cost of electronically controlled unit pump.On the other hand, each component of electronically controlled unit pump finally need can be used for fuel injection system through the integral installation prescription of monoblock pump manufacturer.Therefore monoblock pump manufacturer not only will further investigate the action response characteristic of electromagnet and armature, proposes concrete technical requirements with the professional production producer to production solenoid valve and armature, but also needs to be grasped the accurate mounting technology of electromagnet and armature.This also can increase the work load of monoblock pump manufacturer when monoblock pump is researched and developed and finally assembled, and causes the increase of monoblock pump manufacturing cost.
4, homogeneity of product is poor.Because there are difference in technical equipment, the technological level of different manufacturers, therefore the precision and the form and position tolerance of each component of monoblock pump of being produced by different manufacturers are inconsistent, and this inconsistency may cause monoblock pump in final integral body assembling tolerance to be amplified.Especially solenoid valve is current collection magnetic force, mechanical force and the hydraulic coupling control gear in one, the action response of each several part and interaction intricately are coupled, the error brought will influence the conformity between the monoblock pump product and the conformity of fuel injection system spray characteristic in tolerance that is exaggerated and the assembling, reduce the control accuracy of solenoid valve, increase the test and the staking-out work of fuel injection control systems, even can cause to form good cooperation between each component.
5, electronically controlled unit pump maintenance difficult, the maintenance cost height.The moving element of solenoid valve is done to-and-fro motion at a high speed as control valve rod, armature when working, bear high-frequency percussion, damages easily.The reliability of each constituent elements of electronically controlled unit pump is also different, the reliability of solenoid valve is poor than the plunger pressures partially, if the control valve rod of solenoid valve goes wrong, the pump housing that then may cause constituting precision pair with it can't continue to use, and then make the plunger that constitutes even part with the pump housing can't continue use, thereby increased the maintenance cost of monoblock pump greatly.Because the electromagnetic valve body and the pump housing are independent, all need on the pump housing, carry out in addition, also strengthen the maintenance difficult of solenoid valve the maintenance and the replacement of electromagnetic valve components.
Summary of the invention
The object of the present invention is to provide manufacture cost, the homogeneity of product that improves electronically controlled unit pump that can reduce monoblock pump, the modularized electric unit pump that improves production assembling and use maintenance convenience.
The object of the present invention is achieved like this:
Modularized electric unit pump of the present invention is characterized in that: comprise solenoid valve, be located by connecting partly and the plunger pressures partially; Solenoid valve comprises valve body, electromagnet, electromagnet cushion block, armature and control valve rod, electromagnet is installed in the electromagnet housing, electromagnet housing links to each other with valve body by the electromagnet cushion block, and the control valve rod is installed in the valve body, and armature links to each other with electromagnet with the control valve rod respectively; The part that is located by connecting comprises sealing orifice plate and locating stud; The plunger pressures partially comprises the pump housing, plunger, piston spring, tappet and roller, and plunger is installed in the pump housing and by plunger bushing and links to each other with the pump housing, the outside piston spring of installing of plunger, and plunger one end connects tappet, and tappet connects roller; Solenoid valve and plunger pressures partially link together by sealing orifice plate and locating stud.
Modularized electric unit pump of the present invention can also comprise:
1, the sealing table top is installed in the below of described valve body, has vertical oilhole and solenoid valve positioning pin hole on the sealing table top.
2, described armature place is provided with oil pocket, has the balance oil hole that is connected with vertical oilhole in the oil pocket.
3, have oilhole and sealing orifice plate positioning pin hole on the described sealing orifice plate.
4, have plunger pressures partially positioning pin hole, oil inlet hole and spill port on the described plunger bushing.
Advantage of the present invention is: modular production and assembling can reduce the production assembly cost of electronic unit pump body and solenoid valve, alleviate monoblock pump manufacturer solenoid valve is studied and assembling aspect burden, reduce the manufacture cost of electronically controlled unit pump, avoid monoblock pump manufacturing tolerances in the production assembly process to be exaggerated or to introduce new commentaries on classics and join error, improve the homogeneity of product of electronically controlled unit pump, improve electronically controlled unit pump producing assembling and using the convenience that keeps in repair, reduce the maintenance cost of electronically controlled unit pump.
Description of drawings
Fig. 1 is a solenoid valve plan view of the present invention;
Fig. 2 is a solenoid valve schematic bottom view of the present invention;
Fig. 3 is a solenoid valve A-A sectional drawing of the present invention;
Fig. 4 is a solenoid valve master pseudosection of the present invention;
Fig. 5 is a solenoid valve top plan view of the present invention;
Fig. 6 is the present invention's part closed hole plate structure schematic representation that is located by connecting;
Fig. 7 is the present invention's part sealing orifice plate worm's eye view that is located by connecting;
Fig. 8 is a plunger pressures partially plunger bushing structural representation of the present invention;
Fig. 9 is a plunger pressures partially plunger bushing plan view of the present invention;
Figure 10 is a modularized electric unit pump sectional drawing of the present invention.
Embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1～10, Fig. 1,2,3,4,5 is the schematic representation of modularized electric unit pump solenoid valve, and solenoid valve mainly is made up of valve body 1, electromagnet housing 2, electromagnet cushion block 3, control valve rod 4, armature 5, Returnning spring baffle plate 6, valve rod Returnning spring 7, return spring holder 8, armature fastening screw trip bolt 9, plug 10, electromagnet 11, electromagnetic coil 12, packing ring 13, stay bolt 14, link block 15 and relevant oilhole and installing and locating hole.
Electromagnetic valve body 1, solenoid valve housing 2 and 3 three critical pieces of electromagnet cushion block have been shown among Fig. 1, and electromagnet housing 2 is connected as a single entity by stay bolt 14 and valve body 1 and electromagnet cushion block 3, and stay bolt 14 opposite sides are equipped with packing ring 13, in order to reduce assembling pressure.As Fig. 1, shown in 5, valve body 1 both sides intermediate portion all is processed with the oblique oilhole 34 that communicates with vertical oilhole 33, and fuel oils advance, the path of oil return in order to constitute jointly with vertical oilhole 33, and these two oblique oilholes 34 are all with link block 15 interference sealing, to avoid fuel leakage.Vertically the position of oilhole 33 and structure are as shown in Fig. 2 and Fig. 3.
The master that Fig. 4 and Fig. 5 are respectively solenoid valve looks and top plan view, as shown in FIG., solenoid valve is a conical surface control valve, and its control valve rod 4 is formed the hydraulic control valve coupling with valve body 1, sealing cone and the sealing taper hole precision-fit of valve body 1 of control valve rod 4 constitute the advancing of fuel oil, the conical surface is controlled in oil return.Electromagnetic coil 12 is around on the electromagnet 11 and with the electric insulating sealant embedding, electromagnet 11 interference embed in the electromagnet housing 2.Seal ring 26,27 is installed, to guarantee the sealing of fuel oil on the electromagnet cushion block 3.Returnning spring baffle plate 6 is pressed on the valve body 1 by electromagnet cushion block 3, the valve rod Returnning spring 7 spring pad baffle plate 6 that is reset is pressed on the return spring holder 8 with certain pretightening force, return spring holder 8 is stuck on the control valve rod 4, and control valve rod 4 is connected as a single entity by armature fastening screw trip bolt 9 and armature 5.
Solenoid valve is controlled by an electronic control unit, and energising is closed, and power-off restoration is opened, its decision oil spout moment closing moment, closing period decision fuel injection quantity.Electronic control unit is by gathering the input signal of engine sensor, after handling as calculated, the switching of output control signal control electromagnet 11, make control valve rod 4 under the acting in conjunction of the spring force of the electromagnetic force of 11 pairs of armature 5 of electromagnet and valve rod Returnning spring 7, together move with armature 5, close or open the advancing of fuel oil, the oil return control conical surface, realization is to the control of fuel pressure, and then realization is controlled fuel-injected.
Be processed with screw thread on the plug 10, by screw thread and valve body 1 link together and plug 10 and valve body 1 between seal washer 25 also is housed, in order to realize seal action, prevent fuel leakage to fuel oil.When control valve rod 4 resetted, plug 10 provided the position-limiting action to control valve rod 4.
Control valve rod 4 axially has central through bore, and an end of close armature 5 is processed with tapped hole, is processed with and the perpendicular radial direction through hole of center oilhole near the tapped hole place.Central through bore is used to be communicated with the oil pocket of controlling valve rod 4 both sides with vertical radial direction through hole, with the fuel pressure in the oil pocket of balance both sides, avoids influencing because of the imbalance of fuel pressure the response characteristic of solenoid valve.Tapped hole is used to control being connected of valve rod 4 and armature 5.
Be processed with sealing table top 30 as shown in Figures 4 and 5 on the electromagnetic valve body 1,35, four pilot holes 36 of 32, two vertical oilholes of 31, two positioning pin holes of oil inlet hole, 34, two balance oil holes of 33, two oblique oilholes.Vertically oilhole 33 communicates with oblique oilhole 34 and balance oil hole 35 respectively, and balance oil hole 35 is used to be communicated with the oil pocket of control valve rod 4 both sides, with the pressure of Balance Control valve rod 4 both sides oil pockets, avoids influencing because of the imbalance of fuel pressure the response characteristic of solenoid valve.Sealing table top 30 is in order to realize solenoid valve and the seal action of the part that is located by connecting below it, positioning pin hole 32 is used for the installing and locating that installing and locating pin 17 is realized solenoid valve and plunger pressures partially, and solenoid valve utilizes four bolts to be assembled into one by four pilot holes 36 and the pump housing.
The part that is located by connecting is made up of sealing orifice plate 16 and locating stud 17.As Fig. 6, shown in Figure 7, have two oilholes 37 and two positioning pin holes 38 on the sealing orifice plate 16.Oilhole 37 communicates with the advancing of the vertical oilhole 33 plunger pressures partiallies of solenoid valve, spill port 41 respectively, is used to be communicated with solenoid valve and plunger pressurization two-part oil circuit up and down.Positioning pin hole 38 is used for installing and locating pin 17, the location when locating stud 17 is used to realize solenoid valve and the assembling of plunger pressures partially.
As Fig. 8, shown in Figure 9, the plunger pressures partially mainly is made up of the pump housing 18, plunger bushing 19, plunger 20, piston spring 21, piston spring seat 22, tappet 23, roller 24 etc.
Plunger 20 is by cam drive, and plunger 20 is stuck on the piston spring seat 22, together presses to cam together with tappet 23 and roller 24 under the effect of the Returnning spring power of piston spring 21.
Plunger bushing 19 outsides are processed with circular groove, cooperate looping oil pocket 39 with the pump housing 18, and seal ring 28,29 is installed between the plunger bushing 19 and the pump housing 18, to guarantee the sealing of annular oil cavity 39.Be processed with on the plunger bushing that 40, two of two positioning pin holes advance, spill port 41, leak spill port 42, be processed with oilhole 43 and 44 on the tappet 23.Advance, spill port 41 communicates with the oilhole 37 of sealing on the orifice plate 16, leak spill port 42 be used for will leakage between plunger bushing 19 and the plunger 20 fuel oil draw winding shape oil pocket 39, and oilhole 43,44 is used to roller 24 and cam that grease channel is provided.
The structure of plunger bushing 19 and oilhole thereof are arranged as Fig. 8, shown in Figure 9.
Working principle of the present invention is:
As shown in figure 10, during electronically controlled unit pump work, plunger overcomes piston spring 21 under the drive of cam Returnning spring power moves upward.Electronic control unit is according to the input signal of engine sensor, through calculating, send control signal in the 20 up a certain moment of plunger, make electromagnet 11 energisings, control valve rod 4 together moves with armature 5 under the acting in conjunction of the spring force of the electromagnetic force of 11 pairs of armature 5 of electromagnet and valve rod Returnning spring 7, close advancing of fuel oil, the oil return control conical surface, cut off low pressure oil circuit and high-pressure oil passage, because it is up that plunger 20 continues, therefore the fuel pressure in the plunger cavity raises rapidly, when reaching the cracking pressure of oil-fuel injector needle-valve, oil sprayer begins inject high pressure fuel oil in the firing chamber.Through behind the oil injection duration, electronic control unit sends control signal, make electromagnet 11 outages, control valve rod 4 resets under the effect of the spring force of valve rod Returnning spring 7, reopens into, the oil return control conical surface, is communicated with low pressure oil circuit and high-pressure oil passage, fuel pressure in the hyperbaric chamber descends rapidly, when pressure was lower than the fuel injector needle valve opening pressure, oil-fuel injector needle-valve was taken a seat, and injection process finishes.When cam enters oil suction segment type line, plunger 20 moves downward under the effect of the spring force of piston spring 21, by advance, spill port 41, sealing orifice plate 16 upper oil holes 37, vertical oilhole 33, oblique oilhole 34 and oil inlet hole 31 oil suction from annular oil cavity 39 make to be full of fuel oil in the plunger cavity once more, for oil spout is next time got ready.
Claims (3)
1. modularized electric unit pump is characterized in that: comprise solenoid valve, be located by connecting partly and the plunger pressures partially; Solenoid valve comprises valve body, electromagnet, electromagnet cushion block, armature and control valve rod, electromagnet is installed in the electromagnet housing, electromagnet housing links to each other with valve body by the electromagnet cushion block, and the control valve rod is installed in the valve body, and armature links to each other with electromagnet with the control valve rod respectively; The part that is located by connecting comprises sealing orifice plate and locating stud; The plunger pressures partially comprises the pump housing, plunger, piston spring, tappet and roller, and plunger is installed in the pump housing and by plunger bushing and links to each other with the pump housing, the outside piston spring of installing of plunger, and plunger one end connects tappet, and tappet connects roller; Solenoid valve and plunger pressures partially link together by sealing orifice plate and locating stud, the sealing table top is installed in the below of valve body, have vertical oilhole and solenoid valve positioning pin hole on the sealing table top, the armature place is provided with oil pocket, has the balance oil hole that is connected with vertical oilhole in the oil pocket.
2. modularized electric unit pump according to claim 1 is characterized in that: have oilhole and sealing orifice plate positioning pin hole on the described sealing orifice plate.
3. modularized electric unit pump according to claim 1 and 2 is characterized in that: have plunger pressures partially positioning pin hole, oil inlet hole and spill port on the described plunger bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101972479A CN101871411B (en) | 2010-06-11 | 2010-06-11 | Modularized electric unit pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101972479A CN101871411B (en) | 2010-06-11 | 2010-06-11 | Modularized electric unit pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101871411A CN101871411A (en) | 2010-10-27 |
| CN101871411B true CN101871411B (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101972479A Expired - Fee Related CN101871411B (en) | 2010-06-11 | 2010-06-11 | Modularized electric unit pump |
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| CN (1) | CN101871411B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019126854A1 (en) * | 2017-12-27 | 2019-07-04 | Robert Bosch Limitada | Fuel pump comprising a fuel flow control electrovalve |
| RU196873U1 (en) * | 2020-01-23 | 2020-03-18 | Общество с ограниченной ответственностью "Проектно-производственное предприятие "Дизельавтоматика" | HIGH PRESSURE FUEL PUMP FOR DIESEL ENGINES |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104806408B (en) * | 2015-04-30 | 2017-05-24 | 哈尔滨工程大学 | Multi-mode normally closed electronic control unit pump |
| CN104806405B (en) * | 2015-04-30 | 2017-04-12 | 哈尔滨工程大学 | Double-acting normally closed electronic unit pump |
| CN104806404B (en) * | 2015-04-30 | 2017-12-12 | 哈尔滨工程大学 | The normally closed electronically controlled unit pump of double acting piezoelectric type |
| CN104806407B (en) * | 2015-04-30 | 2017-04-12 | 哈尔滨工程大学 | Multi-mode electronic control unit pump |
| CN105332834A (en) * | 2015-11-25 | 2016-02-17 | 哈尔滨工程大学 | Normally open type single-valve electronic unit pump for heavy oil |
| CN105484918B (en) * | 2015-12-06 | 2017-11-03 | 北京工业大学 | A kind of method for controlling oil return of monoblock pump fuel system |
| CN105910103B (en) * | 2016-06-20 | 2018-04-13 | 史亮 | Fuel oil heating fuel injector |
| CN106640458B (en) * | 2016-12-31 | 2023-02-28 | 南岳电控（衡阳）工业技术股份有限公司 | Oil return pressure adjusting structure of monoblock pump |
| CN112555474B (en) * | 2020-12-03 | 2023-05-16 | 重庆红江机械有限责任公司 | Mechanical lubricating oil control safety valve assembly |
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| US6315531B1 (en) * | 1998-08-29 | 2001-11-13 | Daimlerchrysler Ag | Jerk pump provided for an internal combustion engine, with a dampened integral solenoid valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5255400B2 (en) * | 2008-10-27 | 2013-08-07 | ヤンマー株式会社 | Fuel injection pump |
| JP2010127153A (en) * | 2008-11-26 | 2010-06-10 | Yanmar Co Ltd | Fuel injection pump |
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2010
- 2010-06-11 CN CN2010101972479A patent/CN101871411B/en not_active Expired - Fee Related
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|---|---|---|---|---|
| GB2335007A (en) * | 1998-03-06 | 1999-09-08 | Bosch Gmbh Robert | Fuel-injection device for internal combustion engines |
| US6315531B1 (en) * | 1998-08-29 | 2001-11-13 | Daimlerchrysler Ag | Jerk pump provided for an internal combustion engine, with a dampened integral solenoid valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019126854A1 (en) * | 2017-12-27 | 2019-07-04 | Robert Bosch Limitada | Fuel pump comprising a fuel flow control electrovalve |
| RU196873U1 (en) * | 2020-01-23 | 2020-03-18 | Общество с ограниченной ответственностью "Проектно-производственное предприятие "Дизельавтоматика" | HIGH PRESSURE FUEL PUMP FOR DIESEL ENGINES |
Also Published As
| Publication number | Publication date |
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| CN101871411A (en) | 2010-10-27 |
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