CN104100425B - The diesel electric-controlled common-rail injector of bunker fuel oil - Google Patents
The diesel electric-controlled common-rail injector of bunker fuel oil Download PDFInfo
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- CN104100425B CN104100425B CN201410353018.XA CN201410353018A CN104100425B CN 104100425 B CN104100425 B CN 104100425B CN 201410353018 A CN201410353018 A CN 201410353018A CN 104100425 B CN104100425 B CN 104100425B
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Abstract
It is an object of the invention to provide the diesel electric-controlled common-rail injector of bunker fuel oil, including oil injector body, electromagnetic valve part, hydraulic resistance balance valve portion, control cavity, injector body, electromagnetic valve part includes iron core, solenoid, armature, valve rod and valve stem sleeve；Coil is wrapped in above iron core, for armature below iron core, armature is connected by nut with valve rod, it it is valve stem sleeve outside valve rod, valve stem sleeve is provided with spill port, valve rod is connected with the hydraulic resistance balance valve being positioned under, hydraulic resistance balance valve is landed on the valve seat of balanced valve valve body under the effect of armature back-moving spring, valve body is presented herein below control cavity, control cavity and needle-valve is formed and controls chamber, control chamber connection heavy oil oil-feed, draining oil circuit, hydraulic resistance balance valve inner hollow, balance valve body has twice oil storage tank.The present invention can improve dynamic response characteristic, it is achieved the accurate Flexible Control to injection timing, fuel injection characteristic and circulating fuel injection quantity, the particularly realization of multi-injection technology.
Description
Technical field
The present invention relates to a kind of marine diesel, the specifically fuel injector of marine diesel.
Background technology
Positive injector has simple in construction and functional reliability advantages of higher, traditional bunker fuel oil diesel engine obtains and is widely used, but positive injector there is also certain deficiency, on electromotor full working scope, injection timing cannot be realized, the accurate Flexible Control of fuel injection characteristic and circulating fuel injection quantity, owing to being pulsation fuel feeding, low speed, during small load condition, expulsion pressure is relatively low, this has a strong impact on fuel-oil atmozation quality, economy and emission performance is caused to be deteriorated, therefore marine machinery formula fuel injector cannot meet the current requirement to fuel economy and the Abgasgesetz of increasingly stringent.Electronic control common rail oil sprayer uses high-speed electromagnetic valve, by controlling the energising moment of high-speed electromagnetic valve, conduction time realizes the accurate Flexible Control to injection timing, circulating fuel injection quantity, and this is the effective means realizing bunker fuel oil diesel engine height fuel economy, low hazardous emission.
Proposing the method using spacing block to enter electromagnetic valve region oil pocket to prevent heavy oil on document " bunker fuel oil electromagnetic control oil sprayer ", utilization control piston forms control chamber with controlling cavity.Existence owing to controlling piston can make the quality of fuel injector movement parts increase, and motional inertia increases, and the dynamic response that fuel injector works can be caused slack-off.Additionally, control chamber on the top of fuel injector, and away from needle-valve, this can increase the delayed of fuel oil fluid power during fuel injector work, reduces the dynamic response characteristic of fuel injector.Being deteriorated of fuel injector dynamic response characteristic directly reduces the electric-controlled fuel injector control unit control accuracy to injection timing, fuel injection characteristic and circulating fuel injection quantity, and this will increase the fuel consumption of diesel engine and worsen discharge.
The work fuel oil of bunker fuel oil diesel engine is heavy oil, viscosity is bigger, need it is preheated so as to there is mobility and could normally use, but High Temperature and Heavy Oil has very strong corrosivity, therefore with heavy oil for the electronic control common rail oil sprayer working fuel oil, should prevent heavy oil from entering in the oil pocket residing for electromagnetic valve in draining process, to ensure electromagnetic valve normal operation, also need to electromagnetic valve is cooled down simultaneously.Automobile-used common-rail injector is then with diesel oil for fuel oil, it is absent from the fuel oil corrosiveness to electromagnetic valve, simultaneously also without the necessity that electromagnetic valve is cooled down, therefore automobile-used big flow common-rail injector cannot directly apply to bunker fuel oil diesel engine, it is necessary to fuel injector re-starts structural design to adapt to the needs of astatki.
Summary of the invention
It is an object of the invention to provide reliability height, the diesel electric-controlled common-rail injector of the accurate bunker fuel oil of fuel injection amount.
The object of the present invention is achieved like this:
nullThe diesel electric-controlled common-rail injector of bunker fuel oil of the present invention，It is characterized in that: include oil injector body、Electromagnetic valve part、Hydraulic resistance balance valve portion、Control cavity、Atomizer part，Electromagnetic valve part is arranged in oil injector body，Oil injector body、Hydraulic resistance balance valve portion、Control cavity、Atomizer part sets gradually from top to bottom，Electromagnetic valve part includes iron core、Armature、Armature return spring、Valve rod、Valve stem sleeve，Iron core is arranged in oil injector body，Armature is positioned at below iron core，Valve rod is connected with armature，Valve stem sleeve is arranged on outside valve rod，Valve stem sleeve is provided with spill port，Valve rod upper end traverse armature，Armature return spring is installed in iron core，Valve rod upper end withstands on armature return spring，Hydraulic resistance balance valve portion includes balanced valve spool、Balanced valve valve body，Balanced valve valve body is at oil injector body and controls between cavity，Balanced valve spool is arranged in balanced valve valve body，Valve rod is connected with balanced valve spool，Balanced valve valve core inside is provided with spool cavity，Oil injector body is respectively provided with lubricating oil oil-feed oil circuit、Lubricating oil return oil circuit、First oil return circuit，Lubricating oil oil-feed oil circuit communicates with the chamber between armature and iron core，Chamber between lubricating oil return oil circuit with armature lower surface and oil injector body communicates，Oil return circuit communicates with spill port，Draining oil pocket is set in balanced valve valve body、Heavy oil draining oil circuit、Second oil return circuit，There is cavity in the balanced valve spool upper end in balanced valve valve body，This cavity communicates with draining oil pocket，Heavy oil draining oil circuit communicates with draining oil pocket，Spool cavity and the second oil return circuit communicate.
The present invention can also include:
1, atomizer part includes needle-valve, needle-valve back-moving spring, needle seating, atomizer, injector body, sleeve, control to arrange in cavity control chamber with injector body adjacent, it is cased with the needle-valve upper-end part of driving of needle-valve back-moving spring in controlling in chamber, needle seating is arranged in injector body, needle-valve bottom is fitted on needle seating under needle-valve action of reset spring, oil holding slot is formed between needle-valve and injector body, oil-feed working connection is set in oil injector body, oil-feed working connection is through hydraulic resistance balance valve portion, control cavity and injector body and communicate with oil holding slot, control chamber to be communicated with oil-feed working connection by meter in hole, control chamber to be communicated with heavy oil draining oil circuit by draining throttle orifice, atomizer is arranged on the lower section of injector body, sleeve is enclosed within the outside of injector body and atomizer.
2, armature there are four damping holes along its circumference.
3, being provided with sealing ring on valve stem sleeve, valve stem sleeve is connected by sealing ring and oil injector body are fixing, and valve rod and valve stem sleeve adopt couple clearance seal.
Present invention have an advantage that
1, the injection process of the diesel electric-controlled common-rail injector of the bunker fuel oil of the present invention is by accurate Flexible Control to injection timing, fuel injection characteristic and circulating fuel injection quantity of the accurate control realization of high-speed electromagnetic valve, the particularly realization of multi-injection technology, it is allowed to Marine High-power Diesel Engine meets the requirement of the Abgasgesetz of increasingly stringent under the premise improving fuel economy；2, electromagnetic valve valve rod and valve stem sleeve are a pair precision pair, can effectively prevent heavy oil from entering in the oil pocket residing for electromagnetic valve, it is to avoid electric magnet and armature are subject to the corrosion of heavy oil, it is ensured that the work that electromagnetic valve is safe and reliable.Valve stem sleeve arranges spill port, can in time the miscella of heavy oil and lubricating oil be discharged by oil circuit corresponding on this spill port and oil injector body；3, make the electromagnetic force required for electromagnetic valve not by the impact of rail pressure change with the use of the hydraulic resistance balance valve of conical seal (contact) face, only needing less electromagnetic force just to overcome the effect of spring force to open balanced valve, this is significant to the overall dimensions reducing electromagnetic valve；4, control chamber by controlling cavity and needle-valve is formed, and close to needle-valve, the delayed of fuel oil fluid power can be effectively reduced, improve the control accuracy to oil-fuel injector needle-valve motion, improve the dynamic response characteristic that fuel injector works.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of the electromagnetic valve part of the present invention and hydraulic resistance balance valve portion；
Fig. 3 is the structural representation of the atomizer part of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
In conjunction with Fig. 1～3, the diesel electric-controlled common-rail injector of bunker fuel oil of the present invention is by oil injector body 1, electromagnetic valve part 2, hydraulic resistance balance valve portion 3, control cavity 4 and atomizer 5 and forms.
Electromagnetic valve part 2 includes iron core 6, armature 7, coil 8, valve rod 9, valve stem sleeve 10, armature return spring 11, oil injector body is provided with lubricating oil oil-feed oil circuit 12 and oil return circuit 13, effect is to form thin oil film at electric magnet and armature residual gap, reduce valve rod vibration in motor process, armature 7 is provided with four damping holes 14 of circle distribution, effect is to reduce electric magnet and the hydraulic power of armature residual gap in valve rod uphill process, improves electromagnetic valve dynamic responding speed.Armature 7 is positioned at below iron core 6, and armature 7 is connected by nut with valve rod 9, at effect lower armature 7 and valve rod 9 associated movement of electromagnetic force.Valve rod 9 and valve stem sleeve 10 are a pair precision pair, valve stem sleeve 10 and oil injector body 1 are fixedly linked by two seals circle, having spill port on valve stem sleeve, this spill port is connected with the oil return circuit 15 on oil injector body, and effect is to be discharged by the miscella of heavy oil and lubricating oil.Hydraulic resistance balance valve portion 3 includes with the balanced valve spool 16 of conical seal (contact) face, balanced valve valve body 17, spool 16 is positioned at below valve rod 9, it is be fixedly linked with valve rod 9, valve body 17 and oil injector body 1 are fixed by two seals circle, having heavy oil draining oil circuit 18 on balanced valve valve body 17, the draining oil pocket 19 that this heavy oil draining oil circuit 18 is formed with balance valve core 16 top is connected.A cavity 20, this cavity and an oil return circuit 21 is had to be connected inside hydraulic resistance balance valve, as the hydraulic resistance balance oil circuit of hydraulic resistance balance valve.
The main part of fuel injector is made up of oil injector body 1, control cavity 4 and atomizer part 5.Control cavity 4 and include meter in hole 22, draining throttle orifice 23.Atomizer part 5 includes needle-valve 24, needle-valve back-moving spring 25, needle seating 26, atomizer 27 and sleeve 28.Control chamber 29 to be made up of needle-valve 24 and control cavity 4.Needle-valve 24 is closely adhered on needle seating 26 by needle-valve back-moving spring 25.Needle-valve 24 and injector body 30 form oil holding slot 31, and oil holding slot 31 is connected with heavy oil oil-feed working connection 32.
During the work of bunker fuel oil common-rail injector, control unit gathers each sensor input signal, sends command signal to electromagnetic valve part 2, controls the fuel oil draining process in chamber 29 by controlling the opening and closing of electromagnetic valve, and then realizes opening and taking a seat of needle-valve.When heavy oil enters fuel injector, a part of heavy oil enters in the oil holding slot 31 of atomizer by the oil-feed working connection 32 of atomizer, and another part enters in control chamber 29 by controlling the meter in hole 22 on cavity 4.Controlling the pressure in chamber 29 and oil holding slot 31 equal, under the effect of needle-valve back-moving spring 25, needle-valve 24 and needle seating 26 fit tightly, fuel injector not oil spout；After being energized to electromagnetic valve part 2, under the effect of electromagnetic force, armature 7 band ovable valve stem 9 moves upward, valve rod 9 drives the spool 16 of hydraulic resistance balance valve to move upward so that spool 16 is lifted off a seat body 17, and the heavy oil now controlled in chamber 29 is released by draining throttle orifice 23 and heavy oil draining oil circuit 18, pressure in oil holding slot 31 reduces, when the pressure reduction in oil holding slot 31 and in control chamber 29 is more than the pretightning force of needle-valve back-moving spring 25, needle-valve 24 leaves needle seating 26, fuel injector commencement of fuel injection.
Description according to above-mentioned work process, the diesel electric-controlled common-rail injector controlled by solenoid valve of bunker fuel oil, the accurate Flexible Control to circulating fuel injection quantity, injection timing and fuel injection characteristic is realized by the switching electric process of electromagnetic valve, particularly, control chamber near needle-valve portion, the impact that the fluid power of system is delayed significantly reduces, and the control accuracy of fuel injection amount is greatly improved.Therefore, the present invention, under the premise being effectively improved bunker fuel oil Diesel Engine Fuel Economy, can meet the requirement of the more strict Abgasgesetz of current large-power marine diesel engines.
The diesel electric-controlled common-rail injector of one bunker fuel oil of the present invention, including the miscella oil return circuit of the heavy oil oil-feed on oil injector body, electromagnetic valve part, hydraulic resistance balance valve portion, atomizer, oil injector body, draining oil circuit, the lubricating oil oil-feed of electromagnetic valve, oil return circuit, heavy oil and lubricating oil, electromagnetic valve part includes iron core, solenoid, armature, valve rod and valve stem sleeve；Hydraulic resistance balance valve portion includes with the spool of hydraulic resistance balance valve of conical seal (contact) face, balanced valve valve seat and valve body.Coil is wrapped in above iron core, for armature below iron core, armature is connected by nut with valve rod, it it is valve stem sleeve outside valve rod, valve stem sleeve is provided with spill port, valve rod is connected with the hydraulic resistance balance valve being positioned under, hydraulic resistance balance valve is landed on the valve seat of balanced valve valve body under the effect of armature back-moving spring, valve body is presented herein below control cavity, control cavity and needle-valve is formed and controls chamber, control chamber connection heavy oil oil-feed, draining oil circuit, hydraulic resistance balance valve inner hollow, balance valve body is provided with twice oil storage tank.
Electromagnetic valve valve rod and valve stem sleeve are coaxial, it is positioned at oil injector body, it is a pair precision pair, valve stem sleeve is provided with two seals circle, connected fixing to valve stem sleeve and oil injector body by sealing ring, being provided with the miscella spill port of heavy oil and lubricating oil on valve stem sleeve, this spill port oil return circuit corresponding with on oil injector body is connected.The lubricating oil flowed out from miscella spill port is used to the friction of the gap to valve rod and valve rod inner room and is lubricated, and reduces the friction in stem movement process, it is ensured that valve rod proper motion.
Lubricating oil enters in the cavity residing for armature by the lubricating oil oil-feed oil circuit arranged on oil injector body, is flowed out by the lubricating oil return oil circuit on oil injector body.Lubricating oil forms lubricating oil oil film on the one hand between armature and electric magnet, to reduce the vibration that electromagnetic valve valve rod moves upward in process, on the other hand electromagnetic valve is cooled down, it is ensured that electromagnetic valve normal operation.
Control chamber by controlling cavity and needle-valve is directly formed, control cavity is provided with heavy oil oil-feed, draining oil circuit.
Electromagnetic valve valve rod of the present invention and valve stem sleeve are a pair precision pair, can effectively prevent heavy oil from entering in the oil pocket residing for electromagnetic valve, electric magnet and armature is avoided to be subject to the corrosion of heavy oil, ensure the work that electromagnetic valve is safe and reliable, additionally valve stem sleeve arranges spill port, can in time the miscella of heavy oil and lubricating oil be discharged by oil circuit corresponding on this spill port and oil injector body；Adopt the hydraulic resistance balance valve with conical seal (contact) face so that the electromagnetic force required for electromagnetic valve is not by the impact of rail pressure change, it is only necessary to less electromagnetic force just can overcome the effect of spring force to open balanced valve, be conducive to reducing the overall dimensions of electromagnetic valve；Control chamber by controlling cavity and needle-valve is formed, and close to needle-valve, the delayed of fuel oil fluid power can be effectively reduced, improve the control accuracy to oil-fuel injector needle-valve motion, improve the dynamic response characteristic of fuel injector work, realize the accurate Flexible Control, the particularly realization of multi-injection technology to injection timing, fuel injection characteristic and circulating fuel injection quantity, it is allowed to Marine High-power Diesel Engine meets the requirement of the Abgasgesetz of increasingly stringent under the premise improving fuel economy.
Claims (5)
- null1. the diesel electric-controlled common-rail injector of bunker fuel oil，It is characterized in that: include oil injector body、Electromagnetic valve part、Hydraulic resistance balance valve portion、Control cavity、Atomizer part，Electromagnetic valve part is arranged in oil injector body，Oil injector body、Hydraulic resistance balance valve portion、Control cavity、Atomizer part sets gradually from top to bottom，Electromagnetic valve part includes iron core、Armature、Armature return spring、Valve rod、Valve stem sleeve，Iron core is arranged in oil injector body，Armature is positioned at below iron core，Valve rod is connected with armature，Valve stem sleeve is arranged on outside valve rod，Valve stem sleeve is provided with spill port，Valve rod upper end traverse armature，Armature return spring is installed in iron core，Valve rod upper end withstands on armature return spring，Hydraulic resistance balance valve portion includes balanced valve spool、Balanced valve valve body，Balanced valve valve body is at oil injector body and controls between cavity，Balanced valve spool is arranged in balanced valve valve body，Valve rod is connected with balanced valve spool，Balanced valve valve core inside is provided with spool cavity，Oil injector body is respectively provided with lubricating oil oil-feed oil circuit、Lubricating oil return oil circuit、First oil return circuit，Lubricating oil oil-feed oil circuit communicates with the chamber between armature and iron core，Chamber between lubricating oil return oil circuit with armature lower surface and oil injector body communicates，Oil return circuit communicates with spill port，Draining oil pocket is set in balanced valve valve body、Heavy oil draining oil circuit、Second oil return circuit，There is cavity in the balanced valve spool upper end in balanced valve valve body，This cavity communicates with draining oil pocket，Heavy oil draining oil circuit communicates with draining oil pocket，Spool cavity and the second oil return circuit communicate.
- null2. the diesel electric-controlled common-rail injector of bunker fuel oil according to claim 1，It is characterized in that: atomizer part includes needle-valve、Needle-valve back-moving spring、Needle seating、Atomizer、Injector body、Sleeve，Control to arrange in cavity control chamber with injector body adjacent，It is cased with the needle-valve upper-end part of driving of needle-valve back-moving spring in controlling in chamber，Needle seating is arranged in injector body，Needle-valve bottom is fitted on needle seating under needle-valve action of reset spring，Oil holding slot is formed between needle-valve and injector body，Oil-feed working connection is set in oil injector body，Oil-feed working connection is through hydraulic resistance balance valve portion、Control cavity and injector body and communicate with oil holding slot，Control chamber to be communicated with oil-feed working connection by meter in hole，Control chamber to be communicated with heavy oil draining oil circuit by draining throttle orifice，Atomizer is arranged on the lower section of injector body，Sleeve is enclosed within the outside of injector body and atomizer.
- 3. the diesel electric-controlled common-rail injector of bunker fuel oil according to claim 1 and 2, is characterized in that: have four damping holes along its circumference on armature.
- 4. the diesel electric-controlled common-rail injector of bunker fuel oil according to claim 1 and 2, is characterized in that: be provided with sealing ring on valve stem sleeve, and valve stem sleeve is connected by sealing ring and oil injector body are fixing, and valve rod and valve stem sleeve adopt couple clearance seal.
- 5. the diesel electric-controlled common-rail injector of bunker fuel oil according to claim 3, is characterized in that: be provided with sealing ring on valve stem sleeve, and valve stem sleeve is connected by sealing ring and oil injector body are fixing, and valve rod and valve stem sleeve adopt couple clearance seal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410353018.XA CN104100425B (en) | 2014-07-23 | 2014-07-23 | The diesel electric-controlled common-rail injector of bunker fuel oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410353018.XA CN104100425B (en) | 2014-07-23 | 2014-07-23 | The diesel electric-controlled common-rail injector of bunker fuel oil |
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| CN104100425A CN104100425A (en) | 2014-10-15 |
| CN104100425B true CN104100425B (en) | 2016-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109958564B (en) * | 2017-12-26 | 2023-09-29 | 天津大学（青岛）海洋工程研究院有限公司 | Electromagnetic valve for common rail type electric control fuel injector of diesel engine |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106609719B (en) * | 2016-12-31 | 2022-05-10 | 南岳电控（衡阳）工业技术股份有限公司 | Oil sprayer for high-pressure common rail fuel injection system |
| CN110185804A (en) * | 2019-05-14 | 2019-08-30 | 佛山一精模具配件有限公司 | A kind of resistance to compression pneumatic jack valve |
| CN112343744A (en) * | 2020-11-03 | 2021-02-09 | 中国北方发动机研究所(天津) | Oil way structure of oil sprayer control cavity |
| CN114635818A (en) * | 2022-03-09 | 2022-06-17 | 哈尔滨工程大学 | High-speed electromagnetic valve for realizing stable injection of common rail fuel injector by utilizing flexible hydraulic damping |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10207997A1 (en) * | 2002-02-26 | 2003-08-28 | Orange Gmbh | Fuel injector for diesel or heavy oil for combustion engine, has two coaxial piston elements in the control valve |
| AT500889B8 (en) * | 2004-08-06 | 2007-02-15 | Bosch Gmbh Robert | DEVICE FOR INJECTING FUEL IN THE COMBUSTION ENGINE OF AN INTERNAL COMBUSTION ENGINE |
| US7810743B2 (en) * | 2006-01-23 | 2010-10-12 | Kimberly-Clark Worldwide, Inc. | Ultrasonic liquid delivery device |
| CN103184960B (en) * | 2013-03-26 | 2015-06-17 | 哈尔滨工程大学 | Marine electromagnetically-controlled heavy oil injector |
| CN203978685U (en) * | 2014-07-23 | 2014-12-03 | 哈尔滨工程大学 | The diesel electric-controlled common-rail injector of bunker fuel oil |
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2014
- 2014-07-23 CN CN201410353018.XA patent/CN104100425B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109958564B (en) * | 2017-12-26 | 2023-09-29 | 天津大学（青岛）海洋工程研究院有限公司 | Electromagnetic valve for common rail type electric control fuel injector of diesel engine |
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