CN100567727C - A kind of electric oil supplier - Google Patents
A kind of electric oil supplier Download PDFInfo
- Publication number
- CN100567727C CN100567727C CNB2007100710284A CN200710071028A CN100567727C CN 100567727 C CN100567727 C CN 100567727C CN B2007100710284 A CNB2007100710284 A CN B2007100710284A CN 200710071028 A CN200710071028 A CN 200710071028A CN 100567727 C CN100567727 C CN 100567727C
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- CN
- China
- Prior art keywords
- plunger
- fuel oil
- pressure chamber
- exhaust port
- fuel
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- 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.)
- Expired - Fee Related
Links
- 239000000295 fuel oil Substances 0.000 claims abstract description 76
- 239000003921 oil Substances 0.000 claims abstract description 36
- 239000000446 fuel Substances 0.000 claims abstract description 24
- 230000003068 static effect Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 10
- 239000007924 injection Substances 0.000 abstract description 10
- 238000007599 discharging Methods 0.000 abstract description 2
- 230000033001 locomotion Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 230000004087 circulation Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000004122 cyclic group Chemical class 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010761 intermediate fuel oil Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Abstract
A kind of electric oil supplier, belong to technical field of engines, driven by pwm pulse signal, comprise the pressure chamber that constitutes by sleeve and plunger, fuel oil chamber around the pressure chamber, plunger can be free to slide on the sliding inwall of sleeve, plunger comprises an annular groove, annular groove remains with the pressure chamber and is communicated with, one is passed the exhaust port that sleeve lateral wall connects fuel oil chamber and pressure chamber, exhaust port is located at the smooth inner wall of sleeve, and along the moving direction of plunger force feed fuel oil, exhaust port is positioned under the annular groove swims, in the proper functioning stroke range of plunger, exhaust port surpasses in the certain limit of plunger proper functioning stroke the gas that exhaust port and annular groove meet and may exist in the pressure chamber to get rid of by the outer surface institute shutoff of plunger.The present invention solves prior art engine long time high-load operation, can't move the problem that starts with hot car, provides a kind of simple in structure and help discharging gas, recovers the electric oil supplier of fuel injection proper functioning, ato unit as early as possible.
Description
Technical field
The invention belongs to technical field of engines, be specifically related to electric oil supplier, relate in particular to a kind of electronic fuel injection system that is applied in internal-combustion engine.
Background technique
Electromagnetic pump and nozzle be made of one form independently that the scheme of fuel injection apparatus is applied to mini engine field, for example motorcycle field more and more.But when motor is in hot car, during especially hot car starting state, fuel-steam is very big for the proper functioning influence of fuel injection apparatus, and vehicle can't start at all when serious, and therefore how designing this type of fuel injection apparatus is a crucial difficult problem to help hot car startup.
Chinese patent CN1458403A and Chinese patent application (application number 2005101197126) all are the technological schemes that proposes around how helping getting rid of the steam influence.But under the condition of extreme high heat, hot car operation and hot car start the problem of not resolving fully that remains.
Existing particular problem is: engine long time high-load operation, especially in the not good enough climbing state operation of cool condition, hot then car can't start after shelving.Its main cause is that in the pressure chamber that is used for the force feed fuel oil, fuel-steam occupies a part of space makes liquid fuel be difficult to enter the pressure chamber, thereby causes realizing the purpose of force feed fuel oil.
Summary of the invention
The present invention is directed to the problem that prior art exists, purpose be to provide a kind of simple in structure, can help discharging gas, recover electric oil injector proper functioning, ato unit as early as possible.
Purpose of the present invention is achieved through the following technical solutions:
It is a kind of electric oil supplier, driven by pwm pulse signal, it comprises a pressure chamber that is made of sleeve and plunger, fuel oil chamber around described pressure chamber, plunger can be free to slide on the sleeve smooth inner wall, it is characterized in that, plunger comprises an annular groove, annular groove remains with the pressure chamber and is communicated with, one is passed the exhaust port that sleeve lateral wall connects fuel oil chamber and pressure chamber, and exhaust port is located on the smooth inner wall of sleeve, along the moving direction of plunger force feed fuel oil, exhaust port is positioned under the annular groove swims, in the proper functioning stroke range of plunger, exhaust port is surpassed in the certain limit of plunger proper functioning stroke by the outer surface institute shutoff of plunger, for example in the 2mm scope, exhaust port and annular groove meet with the indoor gas that may exist of head pressure.
The proper functioning stroke range of described plunger is meant, under the less situation of the contained steam flow of pressure chamber's intermediate fuel oil, electric oil injector is the requirement of satisfying application-specific, the supplying fuel of a specific motor for example, the required range that reaches of plunger force feed fuel oil, in the case, exhaust port is by the outer surface institute shutoff of plunger, and the fuel oil in the pressure chamber can not be back to the fuel oil chamber by exhaust port; The proper functioning stroke range of described plunger also can refer to, under the situation of pressure chamber's full of liquid fuel, under deciding electromagnetic force drives, for example under the 12V voltage conditions, plunger the maximum distance that can reach.
The shared volume of fuel-steam in the pressure chamber surpasses certain ratio, for example 50%, the motion of plunger can exceed normal working stroke scope, and at this moment, annular groove can arrive the position of exhaust port, by compression steam (comprising air) and part fuel oil sprays into the fuel oil chamber from exhaust port in the pressure chamber, when the plunger return, the media expansion of depositing in the pressure chamber, temperature descends, degree of vacuum improves, and enters the pressure chamber thereby help new fuel oil.
In such scheme, an excessive hole of suction can be set be used to suck fuel oil and exhaust steam.Inhaling the hole of overflowing passes sleeve wall and connects fuel oil chamber and pressure chamber, initial position when plunger is static, annular groove meets with the excessive hole of suction, fuel oil enters the pressure chamber by inhaling the hole of overflowing, at the initial stage of plunger motion, part fuel oil in the pressure chamber and fuel-steam go out the pressure chamber by inhaling the orifice flow that overflows, and after the hole of overflowing was inhaled in the motion shutoff of plunger, the fuel oil in the pressure chamber began to be squeezed.
In fuel oil chamber one side of inhaling overflow hole and exhaust port fuel oil filter can be set and enter the pressure chamber to avoid impurity.
Further, be provided with an oil sucting one-way valve between fuel oil chamber and pressure chamber, like this at the initial stage of plunger returning movement, fuel oil just can enter the pressure chamber by oil sucting one-way valve.
Be positioned at fuel oil chamber one side in the excessive hole of suction and be provided with a discharge one-way valve, enter the pressure chamber by inhaling the hole of overflowing to prevent fuel-steam and fuel oil.
In above-mentioned various schemes, can comprise a nozzle that opens and closes by fuel pressure control, nozzle comprises nozzle group valve, when fuel pressure in the nozzle surpassed institute's definite value, nozzle group valve was opened, the fuel oil ejection.
Further, the length of plunger meets the following conditions, and when exhaust port and plunger annular groove met, plunger was opened nozzle group valve by the Mechanical Contact mode, thereby makes the fuel oil in the fuel oil chamber directly flow out external by nozzle group valve.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is done and to describe in further detail:
Fig. 1 is first embodiment's of an electric oil supplier provided by the invention structural representation.
Fig. 2 is the exhaust process schematic representation of electric oil supplier provided by the invention.
Fig. 3 is second embodiment's of an electric oil supplier provided by the invention structural representation.
Fig. 4 is the oil-absorbing process schematic representation of electric oil supplier provided by the invention.
Fig. 5 is applied to the pie graph of engine fuel system for one embodiment of the invention.
Embodiment
As shown in Figure 1, in first embodiment, electric oil supplier of the present invention comprises: an approximate cylindrical plunger 10,11, one approximate 17, one coils 18 of cylindrical armature of sleeve with approximately circular opening, a nozzle 25,31, one oily shells 30 of 29, one return openings of a filler opening.
The endoporus 11a precision-fit of plunger 10 and sleeve 11 and unrestricted motion therein, plunger 10 is pressure chamber 14 with the space that sleeve 11 forms, oily shell 30 and sleeve 11 form fuel oil chambers 15.
The front end of armature 17 is provided with a supporting element 17a and is used for by the active force between fuel oil and transmission armature 17 and the plunger 10, the center of plunger is provided with fuel oil road 17b and a section 17c who helps the taper of oil return, 17a is a U type body, pass in and out armature fuel oil road 17b without any resistance for fuel oil, the rear end of plunger is a limit body 32, is provided with return opening 31 in the limit body 32.
Between armature chamber 15a and fuel oil chamber 15, be provided with an inner spill port 29a.
Below be the working procedure of electric oil injector provided by the invention:
Fuel oil enters fuel oil chamber 15 from outside oil circuit by filler opening 29, a part enters armature chamber 15a by inner spill port 29a, enter armature oil duct 17b by supporting element 17a again, get back to outside oil circuit through return opening 31 then, another part fuel oil enters pressure chamber 14 by inhaling the hole 13a that overflows.
When a pwm pulse voltage puts on coil 18 two ends, armature 17 moves ahead under the effect of electromagnetic force, and promotion plunger 10 travels forward, being arranged in the part fuel oil of the pressure chamber 14 of end before the plunger 10 and fuel-steam is back among the fuel oil chamber 15 by inhaling the hole 13a that overflows, after the hole 13a that overflows was inhaled in plunger 10 complete shutoff, plunger 10 entered effective fuel oil force feed stroke.
At this moment, if the fuel-steam amount in the pressure chamber 14 is less, the compressibility of fuel oil is lower, the forward movement of plunger 10 is the force feed fuel oil effectively, after fuel pressure raises, push fuel-displaced valve body 20 open and enter nozzle chamber 23, when fuel pressure further raises, can overcome the power of closing of nozzle springs 25, nozzle valve body 27 is open, fuel oil sprays the slit between nozzle valve body 27 and nozzle valve seat 26, such injection is a normal injection, and the emitted dose of fuel oil depends on the effective travel of plunger 10 substantially, before it produces the stroke of maximum fuel delivery in plunger 10 arrival, exhaust port 13 is positioned at the place ahead of annular groove 12 and by the surperficial institute shutoff of plunger 10 always, so exhaust port 13 does not produce any influence for normal injection.According to the width that is added in coil 18 pulsed voltages, after electromagnetic force descended, nozzle valve body 27 dropped back into one's seat in nozzle valve seat 26, and this cyclic spray finishes.Afterwards, return spring 16 promotes plungers 10 and armature 17 is got back to initial position, meets once more when annular groove 12 and inhales when overflowing hole 13a, enters pressure chamber 14 from the fresh fuel oil of fuel oil chamber 15, prepares circulation fuel feeding down.
If the fuel-steam amount in the pressure chamber 14 has occupied certain volume, 50% volume for example, under the situation of identical voltage pulse width, the longer distance of plunger 10 meeting motions, make annular groove 12 can arrive exhaust port 13, like this, compressed fuel-steam is at first gone out pressure chamber 14 from exhaust port 13, and the partially liq fuel oil might enter pressure chamber 14 from exhaust port 13, and plunger 10 is seen shown in Figure 2 in the relative position of sleeve 11.Although this plunger stroke does not have to realize fuel injection, but because fuel-steam is excluded, behind plunger 10 returns, in pressure chamber 14, produce certain degree of vacuum, and the temperature in the pressure chamber 14 can descend to some extent, when plunger 10 was got back to initial position, liquid fuel can enter pressure chamber 14 from fuel oil chamber 15.Otherwise if there is not exhaust port 13, if the leakage rate of fuel-steam is ignored, the space in the pressure chamber 14 is still occupied by fuel-steam, and fresh fuel oil can't enter pressure chamber 14.
Maximum fuel delivery can be determined by the acting ability of this electronic fuel feeding mechanism, also can determine according to the specific requirement of application, for example, the demand to maximum fuel delivery of the motor of 125cc is 18 cubic millimeters of every circulations, the stroke that corresponding diameter is 4 millimeters plungers is approximately 1.5 millimeters, in this case, inhaling the minimum range of overflowing between hole 13a and the exhaust port 13 should be greater than 1.5 millimeters width sum with annular groove 12.
As shown in Figure 3, in second embodiment provided by the invention,
Increased by 36, one steam check valves 33 of 37, one oil inlet holes of an oiling valve, plunger 10 front ends have increased a plunger extending portion 35, and plunger extending portion 35 comprises a side oil duct 35a, and nozzle valve body 27 has increased a valve body extending portion 34.
Different with first embodiment is the following aspects,
The first, fuel oil enters pressure chamber 14 from fuel oil chamber 15 by oiling valve 37 and oil inlet hole 36, this incipient stage at plunger 10 each returns has just taken place, thereby has prolonged fuel oil enters pressure chamber 14 from fuel oil chamber 15 time, further avoids the generation of steam.
Second, initial stroke in plunger 10 forwardings, fuel oil and part steam pass through excessive hole 13a of suction and steam check valve head pressure chambers 33, and fuel oil and the fuel-steams that might be present in the fuel oil chamber 15 can not enter pressure chamber 14 by steam check valve 33 and the excessive hole 13a of suction;
The 3rd, when the fuel-steam amount in the pressure chamber 14 has occupied certain volume, the long stroke motion of plunger 10 can cause steam to be got rid of from exhaust port 13 equally, and, plunger extending portion 35 can be pushed fuel-displaced valve body 20 open by force by Mechanical Contact, next fuel-displaced valve body 20 can be pushed nozzle valve body 27 open by force by Mechanical Contact nozzle group valve body extension portion 34, at this moment, fuel oil in the fuel oil chamber 15 enters pressure chamber 14 from exhaust port 13 by side oil duct 35a, fuel oil in the pressure chamber 14 is from arriving nozzle chamber 23 between the slit of fuel-displaced valve body 20 and delivery valve seat 21, flow out exhaust port 13 again the slit between nozzle valve body 27 and nozzle valve seat 26, plunger 10, the relative position of fuel-displaced valve body 20 and nozzle valve body 27 is seen as Fig. 4.Like this, under the situation of thermal extremes and the generation of great amount of fuel oil steam, as long as add a high-frequency pulse voltage to coil 18, the similar solenoid valve of the effect of electric oil supplier provided by the invention, fuel oil in the case, especially under the effect of engine air inlet tube degree of vacuum, can directly enter motor.
As shown in Figure 5, the practical application of the present invention's electric oil supplier on motor for example.
Fuel oil is entered among the vapor-liquid separator 7 by fuel tank 3 process filter screens 5 and filtrating equipment 6, enter the present invention's electric oil supplier 1 then through filler opening 29, wherein a part of fuel oil sprays into the intake duct 8 of motor 2, remaining part is got back to from return opening 31 among the vapor-liquid separator 7, and the fuel-steam outlet pipe 4 among the vapor-liquid separator 7 is got back to fuel tank.
When hot car starts, can't normal fuel injection if there is fuel-steam in the pressure chamber 14 in the electric oil supplier 1, so before driving, at first drive by the pwm pulse voltage that suitably accounts for wide ratio, for example according to being lower than the wide ratio of accounting for of idling speed fuel delivery, pressure chamber 14 is cooled, and steam leaves behind the pressure chamber again by the normal procedure ato unit.
Claims (6)
1, a kind of electric oil supplier, driven by pwm pulse signal, it comprises a pressure chamber that is made of sleeve and plunger, fuel oil chamber around described pressure chamber, plunger can be free to slide on the sleeve smooth inner wall, it is characterized in that, plunger comprises an annular groove, annular groove remains with the pressure chamber and is communicated with, one is passed the exhaust port that sleeve lateral wall connects fuel oil chamber and pressure chamber, and exhaust port is located on the smooth inner wall of sleeve, along the moving direction of plunger force feed fuel oil, exhaust port is positioned under the annular groove swims, in the proper functioning stroke range of plunger, exhaust port is surpassed in the certain limit of plunger proper functioning stroke by the outer surface institute shutoff of plunger, exhaust port and annular groove meet with the indoor gas that may exist of head pressure, described electric oil supplier comprises that is also inhaled the hole of overflowing, and inhales the hole of overflowing and connects fuel oil chamber and pressure chamber, the initial position when plunger is static, annular groove is positioned to be inhaled near the hole of overflowing, and makes the pressure chamber be communicated with the fuel oil chamber.
2, electric oil supplier as claimed in claim 1 is characterized in that: fuel oil chamber one side inhaling overflow hole and exhaust port is provided with fuel oil filter.
3, electric oil supplier as claimed in claim 2 is characterized in that, is provided with an oiling valve between fuel oil chamber and pressure chamber.
4, electric oil supplier as claimed in claim 3 is characterized in that: be positioned at fuel oil chamber one side in the excessive hole of suction and be provided with a steam check valve.
5, as one of claim 1～4 described electric oil supplier, it is characterized in that: electric oil supplier comprises a nozzle that is opened and closed by fuel pressure control, and nozzle comprises nozzle group valve, when fuel pressure in the nozzle surpasses institute's definite value, nozzle group valve is opened, the fuel oil ejection.
6, electric oil supplier as claimed in claim 5, it is characterized in that: the length of plunger meets the following conditions, when exhaust port and plunger annular groove met, plunger was opened nozzle group valve by the Mechanical Contact mode, thereby made the fuel oil in the fuel oil chamber directly flow out external by nozzle group valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100710284A CN100567727C (en) | 2007-08-29 | 2007-08-29 | A kind of electric oil supplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100710284A CN100567727C (en) | 2007-08-29 | 2007-08-29 | A kind of electric oil supplier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101117929A CN101117929A (en) | 2008-02-06 |
| CN100567727C true CN100567727C (en) | 2009-12-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100710284A Expired - Fee Related CN100567727C (en) | 2007-08-29 | 2007-08-29 | A kind of electric oil supplier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100567727C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907280B (en) * | 2017-03-16 | 2019-06-21 | 北京理工大学 | A kind of fuel injector |
| CN107642445B (en) * | 2017-09-27 | 2020-01-14 | 北京航空航天大学 | Electromagnetic pulse jet pump for two-stroke direct injection heavy oil engine and control method thereof |
| CN108457787A (en) * | 2018-01-30 | 2018-08-28 | 中国第汽车股份有限公司 | A kind of outward opening swirl injection device and its working method |
| CN117605813B (en) * | 2024-01-24 | 2024-03-29 | 布赫传动科技(苏州)有限公司 | Assembling method and auxiliary assembling tool for speed reducer |
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2007
- 2007-08-29 CN CNB2007100710284A patent/CN100567727C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101117929A (en) | 2008-02-06 |
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Owner name: SHAOXING PINGGUO ELECTRONIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHEJIANG FAI ELECTRONICS CO., LTD. Effective date: 20110624 |
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Effective date of registration: 20110624 Address after: 312300, No. 299, Haibin Avenue, Lek Hai Town, Shaoxing Binhai New Town, Zhejiang, Shaoxing, 105 Patentee after: Shaoxing Pingguo Electronics Technology Co.,Ltd. Address before: 310018, No. fourteenth, No. 17-1, Hangzhou Economic Development Zone, Zhejiang Patentee before: Zhejiang FAI Electronics Co., Ltd. |
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Owner name: ZHEJIANG FAI ELECTRONICS CO., LTD. Free format text: FORMER OWNER: SHAOXING PINGGUO ELECTRONIC TECHNOLOGY CO., LTD. Effective date: 20120419 |
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Effective date of registration: 20120419 Address after: 310013, room 413, 612 Pier Road, Hangzhou, Zhejiang, Xihu District Patentee after: Zhejiang FAI Electronics Co., Ltd. Address before: 312300, No. 299, Haibin Avenue, Lek Hai Town, Shaoxing Binhai New Town, Zhejiang, Shaoxing, 105 Patentee before: Shaoxing Pingguo Electronics Technology Co.,Ltd. |
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Owner name: SAIERFU (XIAMEN) INDUSTRY CO., LTD. Free format text: FORMER OWNER: ZHEJIANG FAI ELECTRONICS CO., LTD. Effective date: 20130625 |
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Free format text: CORRECT: ADDRESS; FROM: 310013 HANGZHOU, ZHEJIANG PROVINCE TO: 361007 XIAMEN, FUJIAN PROVINCE |
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Effective date of registration: 20130625 Address after: Dongpu road Xiamen City, Fujian province 361007 Siming District No. 22 two floor Patentee after: Saierfu (Xiamen) Industry Co., Ltd. Address before: 310013, room 413, 612 Pier Road, Hangzhou, Zhejiang, Xihu District Patentee before: Zhejiang FAI Electronics Co., Ltd. |
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