CN105822475A - Novel common rail injector - Google Patents

Novel common rail injector Download PDF

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Publication number
CN105822475A
CN105822475A CN201511023051.7A CN201511023051A CN105822475A CN 105822475 A CN105822475 A CN 105822475A CN 201511023051 A CN201511023051 A CN 201511023051A CN 105822475 A CN105822475 A CN 105822475A
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CN
China
Prior art keywords
hole
valve seat
control valve
oil
needle
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Granted
Application number
CN201511023051.7A
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Chinese (zh)
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CN105822475B (en
Inventor
龙美彪
欧阳玲湘
黄民备
李吉朋
谭四喜
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NANYUE ELECTRONIC CONTROL (HENGYANG) INDUSTRY TECHNOLOGY Co Ltd
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NANYUE ELECTRONIC CONTROL (HENGYANG) INDUSTRY TECHNOLOGY Co Ltd
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Publication of CN105822475A publication Critical patent/CN105822475A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention discloses a novel common rail injector. The novel common rail injector comprises an injector part, an electromagnetic valve part and an injection nozzle part. The electromagnetic valve part and the injection nozzle part are installed at the upper end and the lower end of the injector part correspondingly. The mode combining the two-position three-way electromagnetic valve control part with the injection nozzle part with adjustable starting pressure is adopted, the structure is simple, and the injection initial point and injection amount can be flexibly controlled. A control valve element and an armature lever are of a fuel pressure self-balancing structure, the injection starting response speed can be remarkably increased, and the drive current of an electromagnet can be lowered, so that the service life of the electromagnet is effectively prolonged, and the reliability of the electromagnet is effectively improved. Return oil throttling holes are formed in an adjusting shim, return oil can be effectively controlled, and the return oil amount is reduced. Return oil grooves are formed between valve bodies, and the leakproofness can be remarkably improved. Pressure control chamber structures, oil outlet throttling hole control ball valves and control piston matching part pairs of traditional common rail injectors are omitted, the parts are easy to manufacture, the manufacturing difficulty is low, and the process cost is low.

Description

A kind of New Common Rail fuel injector
Technical field
The present invention relates to a kind of New Common Rail fuel injector that can the most effectively control beginning of injection and freely regulate distributive value.It is particularly well-suited to Diesel engine common rail system.
Background technology
Along with Abgasgesetz increasingly stringent, society is more and more higher to engine emission requirements, and improves injection system and can be effectively improved combustion position, improve efficiency of combustion and reduce discharge, and therefore the application of high-pressure common rail technology is more and more extensive.Co-rail fuel feed pump in high-pressure common-rail fuel system can produce stable high pressure fuel in common rail pipe, by reaching to control beginning of injection and the purpose of distributive value to the Electronic Control (fuel injector electric magnet) of the spraying system (common-rail injector) connecting common rail pipe.
The common-rail injector of main flow includes the parts such as electromagnetic valve, pressure amplification system and injector nozzle matching parts the most on the market.Wherein, pressure amplification system mainly includes pressure controling chamber's (including controlling top land, meter in hole, fuel-displaced throttle orifice), controls the parts such as piston couple orifices controls ball valve secondary, fuel-displaced, needle-valve body oil holding slot.Response speed when needle-valve opens and closes mainly is determined by pressure controling chamber's volume size.Injector valve is opened stability, the shortest injection process and stable minimum distributive value and is then determined by the face area of the discharge characteristic of meter in hole and fuel-displaced throttle orifice with flow concordance and control piston.In order to realize accurately controlling, the processing to above-mentioned parts must be strict with, and this adds increased difficulty of processing and processing concordance difficulty.The error in geometrical form control in such as meter in hole and meter out hole just requires the highest.Accordingly, it is considered to factors above, it is necessary to improve common-rail injector, and the present invention just effectively reduces processing technique difficulty, and simple in construction, easily controllable.
For the common-rail injector of current widely used Bosch, its operation principle is through controlling the pressure change of pressure controling chamber and controls needle-valve and move, and needle-valve moves axially at needle chamber and controls nozzle and open and close.By processing fuel-displaced throttle orifice at throttle plate and forming meter in hole in controlling top land lining, the pressure being controlled pressure controling chamber by pressure differential is changed.This method for designing processes requires height, measure inconvenience, if processing technique is not in place, it is easy to produce gap reveal, and from the point of view of the technological level with regard to current China fuel system processing industry, being extremely difficult to processing request and processing concordance, this kind of design common rail that increased with regard to limit value of difficulty of processing produces the promotion and application of product.
Needle-valve and the seat design of general fuel injector are interactive, i.e. electric magnet energising, and needle-valve is opened, and drainback passage is closed；Electric magnet power-off, needle-valve closedown, oil inlet passage is closed.Using this type needle valve switch, there will be the overlapping time making drainback passage and oil inlet passage simultaneously open, oil inlet passage situation about connecting of short duration with drainback passage occurs, the appearance of this overlapping time, high pressure fuel is made to be directly entered in drainback passage, single injection event recirculating oil quantity certainly will be caused to increase, reduce oil spout efficiency.
Summary of the invention
The technical problem to be solved is to provide for the deficiency existing for prior art a kind of, simple in construction lower than traditional common rail fuel injector processing technique difficulty, can realize accurately control, can effectively reduce the New Common Rail fuel injector of oil return.
The technical problem to be solved can be achieved through the following technical solutions:
New Common Rail fuel injector, including oil injector body parts, electromagnet component and atomizer parts；
Described oil injector body parts include an oil injector body, inlet connector seal washer, inlet connector and clearance filter, and the upper end of described oil injector body is provided with upper external thread, and the lower end of oil injector body is provided with lower external thread；Described oil injector body bosom position on the upper side is provided with inlet connector installing hole, the first oil input channel, electromagnetic valve components installing hole, described electromagnetic valve components installing hole is divided into and is from top to bottom coaxially disposed and is sequentially communicated and electromagnetic valve components that internal diameter is sequentially reduced installs hole, the first electromagnetic valve components installs interstitial hole, the second electromagnetic valve components installs interstitial hole and electromagnetic valve components installs lower opening, is provided with one section of first female thread in described first electromagnetic valve components installs interstitial hole；At the bottom of the entrance of described first oil input channel and the hole of described inlet connector installing hole through, through at the bottom of the outlet of the first oil input channel and the hole of described second electromagnetic valve components installation interstitial hole；Below described oil injector body bosom, position is provided with the first middle oil duct, atomizer member mounting holes and the second middle oil duct, described first middle oil duct and described atomizer member mounting holes coaxially and are mutually communicated, first middle oil duct is positioned at above described atomizer member mounting holes, and described first middle oil duct and the second middle oil duct are parallel to each other；Described first middle oil duct and described electromagnetic valve components are installed coaxial and described first middle oil duct the top of lower opening and are connected at the bottom of the hole of described electromagnetic valve components installation lower opening, the bottom of described atomizer member mounting holes is all concordant with the bottom of described oil injector body with the bottom of described second middle oil duct, and the top of the second middle oil duct is installed at the bottom of the hole of interstitial hole through with described second electromagnetic valve components；Described inlet connector is arranged in described inlet connector installing hole, and described inlet connector is connected with oil inlet pipe；Between described inlet connector seal washer is arranged at the bottom of the bottom of described inlet connector and the hole of described inlet connector installing hole, it is respectively arranged with the first fuel feed hole and the second fuel feed hole inside described inlet connector inside and inlet connector seal washer, described first fuel feed hole is connected with the entrance of described first oil input channel by described second fuel feed hole, and described clearance filter is arranged in described first fuel feed hole；At the bottom of described second electromagnetic valve components installs the hole of interstitial hole, it is configured with on two hole, location, is configured with hole, some lower location in the bottom surface of described oil injector body；
Described electromagnetic valve components includes the very tight cap of electric magnet plug, electric magnet, electromagnet housing, electromagnetism, electric magnet pad, electric magnet O RunddichtringO, electric magnet spring washer, electric magnet spring, oil returning pipe joint, clamp cover, clamp, armature lever, armature, armature buffer spring, controls spool, locking swivel nut, valve seat, regulation pad, upper control valve seat, lower control valve seat, control valve spring seat, control valve spring, control valve spring pad；
Described electric magnet is arranged in described electromagnet housing, and described electric magnet plug is arranged on described electromagnet housing and electrically connects with the coil in described electric magnet；Be configured with step surface in the peripheral appropriate location of described electromagnet housing, the upper end of the very tight cap of described electromagnetism is configured with a flange, and lower end is provided with one second female thread；Described electromagnet housing outer peripheral face bottom is provided with a closure gasket groove；
From top to bottom being coaxially arranged with oil returning pipe joint installing hole, electric magnet spring mounting hole and the armature installing hole being interconnected inside described electric magnet, the internal diameter of described armature installing hole is more than the internal diameter of described electric magnet spring mounting hole；Being provided with oil returning pipe joint in described oil returning pipe joint installing hole, described oil returning pipe joint is connected with oil return pipe；It is provided with oil return through-hole in described electric magnet spring washer；
Described armature lever is divided into the first bar segment being coaxially disposed from the bottom to top, second bar segment, 3rd bar segment, 4th bar segment, 5th bar segment, 6th bar segment, 7th bar segment, 8th bar segment composition, wherein the first bar segment, 3rd bar segment, 4th bar segment, 5th bar segment, 6th bar segment, 7th bar segment, 8th bar segment is cylinder bar segment, the largest outside diameter of the first bar segment, the equal external diameter being respectively less than described first bar segment of external diameter of the 3rd bar segment and the 5th bar segment, 7th bar segment external diameter is less than the 5th bar segment external diameter, 4th bar segment external diameter is less than the 7th bar segment external diameter, the external diameter of the 6th bar segment is less than the external diameter of the 4th bar segment, 8th bar segment external diameter is minimum；Second bar segment is made up of upper and lower two circular cone bar segment, wherein the conical surface of the lower circular cone bar segment in the second bar segment is up-small and down-big transition Double-conical-surface, the conical surface of the upper circular cone bar segment in the second bar segment is up big and down small taper seat, the upper end external diameter of the upper circular cone bar segment in the second bar segment is equal to the external diameter of described 3rd bar segment, the lower end external diameter of the upper circular cone bar segment in the second bar segment is equal to the upper end external diameter of the lower circular cone bar segment in described second bar segment, and the lower end external diameter of the lower circular cone bar segment in described second bar segment is equal to the external diameter of the first bar segment；The cone angle of the lower circular cone bar segment in described second bar segment is less than the cone angle of the upper circular cone bar segment in the second bar segment；
The outline of described armature is made up of the upper flange portion being coaxially disposed, lower cylindrical part, and the bottom surface in upper flange portion is the face of being inclined upwardly, and extends to lower cylindrical part, and the center configuration of described armature has armature rod aperture；
The outer peripheral face of described locking swivel nut is provided with one end external screw thread, is internally provided with through hole, and the bottom surface of described locking swivel nut is provided with annular frustum wide at the top and narrow at the bottom；
Be provided with an axial oil leak hole of valve seat in described valve seat, valve seat draining side opening, three the axial spill ports of valve seat, two valve seats axially position hole, a valve base center hole and a valve seat axial cone seal hole, wherein said valve base center hole and valve seat axial cone seal hole are coaxial and are positioned at the center of described valve seat, described valve base center hole is positioned at the top in described valve seat axial cone seal hole, the internal diameter in described valve seat axial cone seal hole is up-small and down-big, and the upper-end inner diameter in valve seat axial cone seal hole is equal to the internal diameter of described valve base center hole；The aperture in described valve seat axial cone seal hole is more than the aperture of the lower circular cone bar segment in the second bar segment of described armature lever；Described three axial spill ports of valve seat, two valve seats axially position end face and the bottom surface of the through described valve seat in hole；At the bottom of the hole of the axial oil leak hole of described valve seat concordant with the bottom surface of described valve seat, the sidewall of the entrance oil leak hole axial with described valve seat of described valve seat draining side opening connects, and the outlet of valve seat draining side opening connects with the sidewall of described valve base center hole；The internal diameter of described valve seat draining side opening is less than the internal diameter of the axial oil leak hole of described valve seat；
Adjustment pad centre bore it is provided with in described adjustment pad, one axial oil leak hole of adjusting pad sheet, three axial spill ports of adjusting pad sheet, two adjusting pad sheets axially position hole, upper at described adjustment pad, it is respectively arranged with three on lower surface to adjust on pads radially drain pan and three and adjust under pads radially drain pan, three adjust on pads radially drain pan and three inner all hole walls with described adjustment pad centre bore adjusting under pads radially drain pan connect, three adjust on pads radially drain pan and three and adjust under pads the radially outer end of drain pan and connect with the outer peripheral face of described adjustment pad；The Kong Ding of described three axial spill ports of adjusting pad sheet connects with radial direction drain pan under radial direction drain pan on described three adjustment pads and three adjustment pads respectively with at the bottom of hole；Described adjustment pad oil leak hole is the most from top to bottom divided into adjustment pad upper shaft to oil leak hole and to adjust axial oil leak hole under pad, and wherein said adjustment pad upper shaft is less than the internal diameter of axially oil leak hole under described adjustment pad to the internal diameter of oil leak hole；Described two adjusting pad sheets axially position end face and the bottom surface of the through described adjustment pad in hole；The internal diameter of described adjustment pad centre bore holds greatly internal diameter slightly larger than described valve seat axial cone seal hole；
Described control spool is divided into the first shell of column, the second shell of column, the 3rd shell of column and the 4th shell of column from bottom to top, first shell of column, the 3rd shell of column and the 4th shell of column are cylindrical section, the external diameter of the 3rd shell of column is more than the first shell of column, the external diameter of the 4th shell of column, the external diameter of the first shell of column, equal to the external diameter of the 4th shell of column, spaced apart on the outer peripheral face of the first shell of column is provided with some annular grooves；Described second shell of column is made up of upper and lower two circular cone shell of columns, wherein the upper circular cone shell of column in the second shell of column is up big and down small circular cone shell of column, the conical surface of upper circular cone shell of column is made up of the conical surface under the conical surface on upper circular cone shell of column and upper circular cone shell of column, and under upper circular cone shell of column, the tapering of the conical surface is less than the tapering of the conical surface on upper circular cone shell of column；Lower circular cone shell of column in second shell of column is up-small and down-big circular cone shell of column；On the upper circular cone shell of column of the upper circular cone shell of column in the second shell of column, the upper end external diameter of the conical surface is equal to the external diameter of described 3rd shell of column, the lower end external diameter of the upper circular cone shell of column in the second shell of column is equal to the upper end external diameter of the lower circular cone shell of column in described second shell of column, and the lower end external diameter of the lower circular cone shell of column in described second shell of column is equal to the external diameter of the first shell of column；
A upper control valve seat centre bore it is provided with in described upper control valve seat, one upper axial bellmouth of control valve seat, one upper axial oil leak hole of control valve seat, two upper control valve seats axially position hole, three upper axially mounted through holes of control valve seat, described upper control valve seat centre bore and the axial bellmouth of upper control valve seat are coaxial and are positioned at the center of described upper control valve seat, described upper control valve seat centre bore is positioned at the top of the described axial bellmouth of upper control valve seat, the internal diameter of the described axial bellmouth of upper control valve seat is up-small and down-big, the small end inner diameter of the axial bellmouth of upper control valve seat is equal to the internal diameter of described upper control valve seat centre bore；The either flush of upper control valve seat described in the Kong Dingyu of described upper control valve seat centre bore, holding greatly of the described axial bellmouth of upper control valve seat is concordant with the bottom surface of described upper control valve seat；Being provided with control valve seat radially drain pan on described on control valve seat bottom surface, the big end of the described axial bellmouth of upper control valve seat is through with described upper control valve seat radially drain pan；At the bottom of the hole of the described axial oil leak hole of upper control valve seat through with described upper control valve seat radially drain pan, the either flush of upper control valve seat described in the Kong Dingyu of the axial oil leak hole of upper control valve seat；In said two, control valve seat axially positions hole, the end face of three upper through described upper control valve seats of the axially mounted through hole of control valve seat and bottom surface；
nullA lower control valve seat centre bore it is provided with in described lower control valve seat、One axial oil leak hole of lower control valve seat、One lower control valve seat axial cone seal hole、One lower control valve seat fuel feed hole、One lower control valve seat oil-feed side opening、Two lower control valve seats axially position hole、Three axially mounted screws of lower control valve seat，Described lower control valve seat axial cone seal hole and described lower control valve seat centre bore are co-axially located at the center of described lower control valve seat and described lower control valve seat axial cone seal hole is positioned at the top of described lower control valve seat centre bore，The internal diameter in described lower control valve seat axial cone seal hole is up big and down small，The small end inner diameter in lower control valve seat axial cone seal hole is equal to the internal diameter of described lower control valve seat centre bore，The tapering in described lower control valve seat axial cone seal hole is more than the tapering of the conical surface under the upper circular cone shell of column in described control spool；Some lower control valve seats radially oil-recovery tank it is configured with in the bottom surface of described lower control valve seat, at the bottom of the inner of some lower control valve seats radially oil-recovery tank and the hole of described lower control valve seat centre bore through, the outer end of some lower control valve seats radial direction oil-recovery tank is through with the outer peripheral face of described lower control valve seat；The described axial oil leak hole of lower control valve seat, two lower control valve seats axially position hole by through to end face and the bottom surface of described lower control valve seat, at the bottom of the hole of described lower control valve seat fuel feed hole concordant with the bottom surface of described lower control valve seat, one end of described lower control valve seat oil-feed side opening connects with the hole wall of described lower control valve seat fuel feed hole, and the other end of lower control valve seat oil-feed side opening connects with the hole wall of described lower control valve seat centre bore；
The maximum outside diameter of described control valve spring seat installs the internal diameter of lower opening less than described electromagnetic valve components, described control valve spring pad is provided with centre bore, and the external diameter of described clamp is more than the armature rod aperture internal diameter of described armature but is less than the internal diameter of described electric magnet spring mounting hole；The maximum outside diameter of described clamp cover is again smaller than the internal diameter of described electric magnet spring mounting hole；Described valve seat, adjustment pad, upper control valve seat, the maximum outside diameter of lower control valve seat install the internal diameter of interstitial hole less than described second electromagnetic valve components；
It is as follows that turning between described electromagnetic valve components and oil injector body joins process:
The first step, described control valve spring pad, control valve spring, control valve spring seat are fitted into described electromagnetic valve components the most successively and install in lower opening, the bottom surface of wherein said control valve spring pad contacts at the bottom of installing the hole of lower opening with described electromagnetic valve components, and the oil duct middle with first in described oil injector body of the through hole on control valve spring pad is suitable for reading to align；The bottom of described control valve spring contacts with the end face of described control valve spring pad, the top of control valve spring is connected with the lower end of described control valve spring seat, after control valve spring pad, control valve spring, control valve spring seat assemble, owing to the maximum outside diameter of described control valve spring seat is less than the internal diameter of described electromagnetic valve components installation lower opening, therefore between the maximum outside diameter and the internal diameter of described electromagnetic valve components installation lower opening of described control valve spring seat, form the first gap；
nullSecond step，The lower end of two control valve seat alignment pins is inserted into the second electromagnetic valve components install in hole, the upper location of two at the bottom of interstitial hole hole，Lower control valve seat is then placed in the second electromagnetic valve components installs interstitial hole and makes two control valve seat alignment pins axially position hole through two lower control valve seats in described lower control valve seat described lower control valve seat is positioned，The lower control valve seat fuel feed hole making the bottom surface of described lower control valve seat be in sealing contact and make at the bottom of installing the hole of interstitial hole with the second electromagnetic valve components in lower control valve seat aligns with the outlet of the first oil input channel in described oil injector body，The outlet of the entrance oil duct middle with second in described oil injector body of the axial oil leak hole of lower control valve seat in lower control valve seat is alignd，Owing to the maximum outside diameter of lower control valve seat is less than described second electromagnetic valve components, the internal diameter of interstitial hole is installed，Therefore between the maximum outside diameter and the internal diameter of described second electromagnetic valve components installation interstitial hole of described lower control valve seat, the second gap is formed，This second gap connects with the lower control valve seat radially oil-recovery tank of described lower control valve seat bottom surface；
3rd step, lower control valve seat axial cone seal hole that first shell of column of described control spool is passed down through in described lower control valve seat and be inserted in the lower control valve seat centre bore in described lower control valve seat, form couple between the outer peripheral face of the first shell of column of described control spool with the hole side face of the lower control valve seat centre bore in described lower control valve seat and coordinate；The bottom surface of the first shell of column controlling spool contacts with the end face of described control valve spring seat；The top of the conical seal (contact) face in the lower control valve seat axial cone seal hole that the part conical surface in upper circular cone shell of column on the second shell of column of described control spool is in described lower control valve seat, making to form a M type high-voltage oil cavity between the face, hole in the lower control valve seat axial cone seal hole in the part conical surface of the upper circular cone shell of column on the second shell of column of described control spool, the conical surface of lower circular cone shell of column controlled on the second shell of column of spool and described lower control valve seat, described M type high-voltage oil cavity connects with the lower control valve seat oil-feed side opening in described lower control valve seat；
null4th step，Upper control valve seat is placed in the second electromagnetic valve components installs interstitial hole and makes two control valve seat alignment pins axially position hole through the upper control valve seat of two in described upper control valve seat described upper control valve seat is positioned，Make the 4th shell of column of described control spool through the upper control valve seat centre bore in described upper control valve seat simultaneously，Behind upper control valve seat location，One of them on upper control valve seat bottom surface lower control valve seat radially oil-recovery tank pushes up with the hole of the axial oil leak hole of lower control valve seat in described lower control valve seat and connects，Owing to the maximum outside diameter of described upper control valve seat is less than described second electromagnetic valve components, the internal diameter of interstitial hole is installed，Third space is formed between maximum outside diameter and the internal diameter of described second electromagnetic valve components installation interstitial hole of the most described upper control valve seat，The lower control valve seat of described lower control valve seat bottom surface radially oil-recovery tank connects with described third space；After additionally going up control valve seat location, the upper axially mounted through hole of control valve seat of in upper control valve seat three aligns respectively with three axially mounted screws of lower control valve seat in lower control valve seat, then three screws are from top to bottom each passed through in three axially mounted screws of lower control valve seat that the axially mounted through hole of control valve seat on three in upper control valve seat is screwed in lower control valve seat, make upper and lower control valve seat link together；
4th step, adjustment pad is put into described second electromagnetic valve components and installs in interstitial hole, and make the upper end of two control valve seat alignment pins axially position hole through two the adjusting pad sheets adjusted on pad to position adjusting pad, after described adjustment pad is put into position and is positioned, the bottom surface adjusting pad contacts with the end face of described upper control valve seat, and make to push up with the hole of the axial oil leak hole of upper control valve seat in described upper control valve seat at the bottom of the hole adjusting axially oil leak hole under pad in adjustment pad to connect, the top simultaneously making the 4th shell of column of described control spool extend in the adjustment pad centre bore of described adjustment pad；Owing to the maximum outside diameter of described adjustment pad is less than the internal diameter of described second electromagnetic valve components installation interstitial hole, therefore between the maximum outside diameter and the internal diameter of described second electromagnetic valve components installation interstitial hole of described adjustment pad, form the 4th gap；
5th step, first bar segment of described armature lever, the second bar segment, the 3rd bar segment are from top to bottom sequentially passed through the valve base center hole in described valve seat, armature lever is become with valve seat combination an assembly, 3rd bar segment of wherein said armature lever coordinates with the valve base center hole couple in described valve seat, and the second bar segment of armature lever exports corresponding with the valve seat draining side opening in valve seat；Assembly is put into described second electromagnetic valve components again and installs in interstitial hole, and make the upper end of two control valve seat alignment pins axially position hole through two valve seats in valve seat valve seat is positioned, after described assembly is placed to position and is positioned, the bottom surface of valve seat contacts with the end face of described adjustment pad, and make to connect to top, oil leak hole hole with the adjustment pad upper shaft in described adjustment pad at the bottom of the hole of the axial oil leak hole of valve seat inner seat, make to connect with radial direction drain pan on three adjustment pads on described adjustment pad end face respectively at the bottom of the hole of three axial spill ports of valve seat in valve seat simultaneously；First bar segment of described armature lever is inserted into and adjusts adjusting in pad centre bore and making the bottom surface of the first bar segment of armature lever contact with the end face of described control spool the 4th shell of column of pad；Owing to the maximum outside diameter of described valve seat is less than the internal diameter of described second electromagnetic valve components installation interstitial hole, therefore between the maximum outside diameter and the internal diameter of described second electromagnetic valve components installation interstitial hole of described valve seat, form the 5th gap；
6th step, after treating that described valve seat assembles, locking swivel nut was overlapped armature lever again and makes first electromagnetic valve components screwed in described oil injector body of outer peripheral face install in the first female thread in interstitial hole, after locking swivel nut is screwed into position, the second electromagnetic valve components that described valve seat, adjustment pad, upper control valve seat, lower control valve seat are pressed in described oil injector body is installed in interstitial hole by the annular boss of locking swivel nut bottom surface, and makes each self-forming at the bottom of the bottom surface of described lower control valve seat and the hole of the second electromagnetic valve components installation interstitial hole seal；The now locking described in the Kong Dingyu of three axial spill ports of valve seat in valve seat via bottoms connection within swivel nut；
6th step, is placed on described electric magnet pad in described electromagnetic valve components installs hole and makes the bottom surface of described electric magnet pad to install with described electromagnetic valve components at the bottom of the hole in hole and contact；Then the upper end of described armature buffer spring is enclosed within the lower cylindrical part of described armature outline one assembly of formation, then the armature lever borehole jack of armature and is made to be formed between armature rod aperture and the 5th bar segment of armature lever tight fit in the 5th bar segment of described armature lever, the assembly that armature and armature buffer spring are formed is installed after putting in place, the bottom of described armature buffer spring is inserted in the through hole within described locking swivel nut and makes the bottom of armature buffer spring contact with the end face of described valve seat, the top of armature buffer spring contacts with the bottom surface, upper flange portion of armature；
7th step, described clamp is stuck in the 6th bar segment of described armature lever, then by described clamp cover, Open Side Down is enclosed within the 7th bar segment of described armature lever, 7th bar segment and the described clamp of armature lever are wrapped, now the bottom surface of clamp contacts with the end face in the upper flange portion of armature, and the end face of clamp contacts with the bottom surface of the 7th bar segment of armature lever；
8th step, electric magnet O RunddichtringO is snapped in the basifacial closure gasket groove in described electromagnet housing periphery, then electric magnet spring washer is put in the electric magnet spring mounting hole within described electric magnet and made the end face of electric magnet spring washer and the hole top contact of electric magnet spring mounting hole；Then electric magnet spring is put in electric magnet spring mounting hole and is made the top of electric magnet spring contact with the bottom surface of described electric magnet spring washer；
null9th step，By electric magnet、Electromagnetic valve housing、Electric magnet spring washer、Electric magnet spring、The assembly of electric magnet O RunddichtringO composition turns the electromagnetic valve components being buckled in oil injector body upper end around and installs in hole，And the electromagnetic valve components making the lower end of described electromagnet housing be inserted in described oil injector body upper end installs in hole，During installation，Electric magnet spring must be made coaxial with armature lever，The 8th bar segment making armature lever is inserted in the lower end of electric magnet spring，The upper surface of the 7th bar segment simultaneously making armature lever contacts with the bottom surface of described electric magnet spring，The hole end face of armature installing hole contacts with the upper flange portion end face of described armature，The bottom surface of electromagnet housing and the end face pre-contact of electric magnet pad，After the above step is finished，And the flange of described electromagnetism very tight cap upper end is made to be pressed on the step surface that described electromagnet housing is peripheral on described electromagnet housing very tight for described electromagnetism cap sleeve，Again by the second internal thread rotation of very tight for described electromagnetism cap lower end in the upper external thread of described oil injector body upper end，Pretightning force on request screws the very tight cap of electromagnetism and can be arranged on described oil injector body by described electromagnet housing；The end face of the most described electric magnet pad contacts with the bottom surface of described electromagnet housing, described electric magnet O RunddichtringO is installed in described electromagnet housing lower end periphery face and described electromagnetic valve components to be formed between the inner hole surface in hole and is sealed, described armature is positioned at described armature installing hole, and the 7th bar segment of described armature lever, the 8th bar segment, clamp, clamp cover, electric magnet spring washer are positioned in the electric magnet spring mounting hole within described electric magnet；
Atomizer parts include pressure spring pad, pressure spring, needle-valve, needle-valve body, nozzle cap nut, push rod, transition block；
Described pressure spring pad is provided with through hole；The unlatching pressure of described atomizer parts can be regulated by the thickness of regulation pressure spring pad；
It is provided with central ejector rod in described transition block and takes up hole, tapered centre hole, center needle-valve jack and transition oil duct, described central ejector rod takes up hole, tapered centre hole, center needle-valve jack are co-axially located at the center of described transition block, wherein central ejector rod takes up hole and is positioned at the top in tapered centre hole, and tapered centre hole is positioned at the top of center needle-valve jack；The end face and bottom surface of transition block are configured with hole, some upper and lower transition location；Described central ejector rod takes up the internal diameter maximum outside diameter more than described push rod in hole；
The outline of described needle-valve body is from top to bottom made up of upper cylindrical section, middle circle shell of column and lower cylindrical section, upper cylindrical section top side configuration at needle-valve body has needle-valve body to position hole, in needle-valve body, there is hole, needle-valve location at center by lower and lower arranged coaxial, is contained oil pocket, nozzle opening, needle-valve taper hole and atomizer, in needle-valve body, additionally it is additionally provided with oil-feed inclined hole, the outlet of oil-feed inclined hole connects with described Sheng oil pocket, and the entrance of oil-feed inclined hole connects with the upper cylindrical section end face of described needle-valve body；
Described needle-valve is from top to bottom bored bar portion by the first Needle shaft portion, the second Needle shaft portion, the 3rd Needle shaft portion and needle-valve and is constituted, the external diameter in the first Needle shaft portion is less than the external diameter in described second Needle shaft portion, the external diameter in the 3rd Needle shaft portion is less than the external diameter in the second Needle shaft portion, and needle-valve cone bar portion is up big and down small；
Oil injector body connecting hole, the first needle-valve body installing hole, the second needle-valve body installing hole the most coaxially it is disposed with in described nozzle cap nut, the internal diameter of described oil injector body connecting hole is more than the internal diameter of the first needle-valve body installing hole, and the internal diameter of the first needle-valve body installing hole is more than the internal diameter of the second needle-valve body installing hole；It is configured with one section of female thread in the upper end of described oil injector body connecting hole；
Described push rod is made up of the first push rod section and the second push rod section, and the first push rod section is positioned at the top of the second push rod section and the diameter diameter less than the second push rod section；The diameter of described second push rod section takes up the internal diameter in hole less than described central ejector rod；
During assembling, first pressure spring pad and pressure spring are placed in the atomizer member mounting holes of oil injector body bottom, the end face of pressure spring pad contacts with the hole end face of atomizer member mounting holes, the upper end of pressure spring contacts with the bottom surface of described pressure spring pad, then by push rod first push rod section press-in pressure spring lower end in and make the end face of the second push rod section contact with the bottom face of pressure spring；
Then the upper end of some transition block alignment pins is inserted in the hole, lower location on described oil injector body bottom surface, in then transition block is arranged on the bottom surface of described oil injector body and makes the hole, upper transition location that some transition block alignment pin lower ends are inserted on transition block end face, transition block is positioned, the end opening making suitable for reading middle with second in the oil injector body oil duct of the transition oil duct of transition block aligns, and makes the central ejector rod in transition block take up borehole jack in the second push rod section of push rod；In the hole, lower transition the location again upper end of some needle-valve body alignment pins being inserted on transition block bottom surface；
Then needle-valve is inserted into the hole, needle-valve location of needle-valve body, contains in oil pocket, nozzle opening, needle-valve taper hole, the end face of needle-valve body is exposed in the first Needle shaft portion on needle-valve, it is secondary that second Needle shaft portion and hole, needle-valve location constitute closely spaced couple, 3rd Needle shaft portion and nozzle opening matched in clearance, the conical seal (contact) face in needle-valve cone bar portion coordinates with the cone seal face seal of needle-valve taper hole；
Needle-valve body is positioned in being arranged on the bottom surface of transition block and make the hole, needle-valve body location that some needle-valve body alignment pin lower ends are inserted on needle-valve body end face by the end face of the needle-valve body that then will be equipped with needle-valve, the center needle-valve jack that the first Needle shaft portion making needle-valve is inserted into transition block is interior and concentric, makes the entrance of the oil-feed inclined hole in needle-valve body align with the transition oil duct end opening in described transition block；
Nozzle cap nut is finally from bottom to top enclosed within needle-valve body and make the female thread of oil injector body connecting hole upper end of this nozzle cap nut spin with the lower external thread of oil injector body bottom, after nozzle cap nut is screwed into position, the first needle-valve body installing hole in nozzle cap nut coordinates with the upper cylindrical section of needle-valve body, at the bottom of the hole of the first needle-valve body installing hole in nozzle cap nut, the bottom surface with the upper cylindrical section of needle-valve body contacts, the second needle-valve body installing hole in nozzle cap nut coordinates with the middle circle shell of column of needle-valve body, by transition block, needle-valve body is closely fitted on the bottom surface of oil injector body.
By using technique scheme, the present invention, compared with existing common-rail injector, present invention have the advantage that
1. the common-rail injector of the present invention can realize beginning of injection, distributive value Flexible Control.Injection timing is controlled by electric magnet energising initial point, and every circulating fuel injection quantity is controlled by regulating magnet length conduction time.
2. the common-rail injector of present invention design is without the Stress control cell structure of other traditional common rail fuel injectors, fuel-displaced orifices controls ball valve, control piston couple pair.So without the big meter in hole of processing technique difficulty and fuel-displaced throttle orifice, therefore the difficulty of processing of the common-rail injector of present invention design is substantially reduced, process costs reduces the most accordingly.Owing to opening meter out hole at adjustment pad, therefore when high pressure fuel enters injection phase, the fuel oil entering oil back chamber substantially reduces, and every fuel delivery per cycle of common rail system high pressure oil-feeding pump reduces the most accordingly, and the service life of common rail system improves.
The control spool of common-rail injector the most of the present invention and valve seat, upper control valve seat, lower control valve seat precision-fit, after the optimized design of sealing cone, oil-feed and oil return control more rapidly effectively.
After each control valve seat drainback passage design etc. of common-rail injector the most of the present invention makes fuel injector interrupt oil spout, oil return is rapid, and needle-valve body is contained the residual pressure in oil pocket and declined faster, makes needle-valve close the rapidest, and fuel injector response speed improves；Harmful secondary injection reduces.
The fuel oil that drain pan design between valve seat the most of the present invention, adjustment pad etc. can make couple seal clearance reveal enters in drainback passage smoothly, reduces and reveals fuel oil aggregation, improves the sealing effectiveness between each sealing surface.
The spool that controls of the electromagnetic valve components of common-rail injector the most of the present invention is fuel pressure self-balancing type structure with the high-pressure sealing chamber design of lower control valve seat and the annular seal space of armature lever and valve seat, controlling spool and armature lever can only axially-movable and only need to overcome axial spring forces, therefore oil spout can be significantly improved and open response speed and reduce the driving electric current of electric magnet, improve service life and the reliability of electric magnet.
Common-rail injector the most of the present invention design controls spool stroke, needle opening pressure is adjustable.The stroke of appropriate design control spool and needle-valve are opened initial tension of spring and can be optimized oil spout response performance.
Being described by above design to this fuel injector, it appeared that the present invention compares other fuel injectors now clear advantage, such as processing technique requires low, simple in construction, control flexibly and oil return effectively minimizing etc..
Accompanying drawing explanation
Fig. 1 is that common-rail injector structural representation of the present invention is always schemed.
Fig. 2 is the enlarged diagram in Fig. 1 at A.
Fig. 3 is the enlarged diagram in Fig. 1 at B.
Fig. 4 is the amplification operating diagram of (electric magnet unlatching) at C in Fig. 2.
Fig. 5 is the amplification operating diagram of (electric magnet closedown) at C in Fig. 2.
Fig. 6 is the structural representation of the valve seat lower surface of the present invention.
Fig. 7 is the structural representation that the present invention adjusts pad lower surface.
Fig. 8 is the A-A sectional view of Fig. 7.
Fig. 9 is the structural representation of control valve seat upper surface in the present invention.
Figure 10 is the structural representation of control valve seat lower surface under the present invention.
Figure 11 is the structural representation of armature lever of the present invention.
Figure 12 is enlarged diagram at the A of Figure 11.
Figure 13 is the structural representation that the present invention controls spool.
Figure 14 is enlarged diagram at the A of Figure 13.
Detailed description of the invention
Seeing Fig. 1 to Figure 14, the New Common Rail fuel injector be given in figure, including oil injector body parts 100, electromagnet component 200 and atomizer parts 300.
Oil injector body parts 100 include an oil injector body 110, inlet connector seal washer 120, inlet connector 130 and clearance filter 140.
The upper end of oil injector body 110 is provided with upper external thread 111, and lower end is provided with lower external thread 112；Oil injector body 110 bosom position on the upper side is provided with inlet connector installing hole the 112, first oil input channel 113, electromagnetic valve components installing hole.
Electromagnetic valve components installing hole is divided into and is from top to bottom coaxially disposed and is sequentially communicated and electromagnetic valve components that internal diameter is sequentially reduced is installed hole the 114, first electromagnetic valve components and installed interstitial hole the 115, second electromagnetic valve components and install interstitial hole 116 and electromagnetic valve components installs lower opening 117, is provided with one section of female thread 115a in the first electromagnetic valve components installs interstitial hole 115.
At the bottom of the entrance of the first oil input channel 113 and the hole of inlet connector installing hole 112 through, through at the bottom of the outlet of the first oil input channel 113 and the hole of the second electromagnetic valve components installation interstitial hole 116.
Below oil injector body 110 bosom, position is provided with the first middle oil duct 118, atomizer member mounting holes 118a and the second middle oil duct 119, first middle oil duct 118 and atomizer member mounting holes 118a coaxially and are mutually communicated, and the first middle oil duct 118 is positioned at above atomizer member mounting holes 118a.First middle oil duct 118 is installed coaxial and the first middle oil duct 118 the top of lower opening 117 and is connected at the bottom of the hole of electromagnetic valve components installation lower opening 117 with electromagnetic valve components, and the bottom of atomizer member mounting holes 118a is all concordant with the bottom of oil injector body 110 with the bottom of the second middle oil duct 119.
Second middle oil duct 119 is parallel to each other with the first middle oil duct 118, and the top of the second middle oil duct 119 is installed at the bottom of the hole of interstitial hole 116 through with the second electromagnetic valve components.
Inlet connector 130 is arranged in inlet connector installing hole 112, and inlet connector 130 is connected with oil inlet pipe (not shown)；Between inlet connector seal washer 120 is arranged at the bottom of the bottom of inlet connector 130 and the hole of inlet connector installing hole 112, it is respectively arranged with the first fuel feed hole 131 and the second fuel feed hole 121 inside inlet connector 130 inside and inlet connector seal washer 120, first fuel feed hole 131 is connected with the entrance of the first oil input channel 113 by the second fuel feed hole 121, and clearance filter 140 is arranged in the first fuel feed hole 131；At the bottom of the second electromagnetic valve components installs the hole of interstitial hole 115, it is configured with on two hole, location (not shown), is configured with hole, some lower location (not shown) in the bottom surface of oil injector body 110.
Electromagnetic valve components 200 includes electric magnet plug 201, electric magnet 202, electromagnet housing 203, the very tight cap of electromagnetism 204, electric magnet pad 205, electric magnet O RunddichtringO 206, electric magnet spring washer 207, electric magnet spring 208, oil returning pipe joint 209, clamp cover 210, clamp 211, armature lever 220, armature 230, armature buffer spring 231, control spool 240, locking swivel nut 250, valve seat 260, regulation pad 270, upper control valve seat 280, lower control valve seat 290, control valve spring seat 232, control valve spring 233, control valve spring pad 234.
Electric magnet 202 is arranged in electromagnet housing 203, and electric magnet plug 201 is arranged on electromagnet housing 203 and electrically connects with the coil in electric magnet 202.
Being configured with step surface 203a in the peripheral appropriate location of electromagnet housing 203, the upper end of the very tight cap of electromagnetism 204 is configured with a flange 204a, and lower end is provided with a female thread 204b；Electromagnet housing 203 outer peripheral face bottom is provided with a closure gasket groove 203b.
Electric magnet 202 is internal is from top to bottom coaxially arranged with oil returning pipe joint installing hole 202a, electric magnet spring mounting hole 202b and the armature installing hole 202c being interconnected, the internal diameter of the armature installing hole 202c internal diameter more than electric magnet spring mounting hole 202b.
Being provided with oil returning pipe joint 209 in oil returning pipe joint installing hole 202a, oil returning pipe joint 209 is connected with oil return pipe (not shown)；Oil return through-hole 207a it is provided with in electric magnet spring washer 207.
nullCombine Figure 11 and Figure 12 especially，Armature lever 220 is divided into the first bar segment 221 being coaxially disposed from the bottom to top、Second bar segment 222、3rd bar segment 223、4th bar segment 224、5th bar segment 225、6th bar segment 226、7th bar segment 227、8th bar segment 228 forms，Wherein the first bar segment 221、3rd bar segment 223、4th bar segment 224、5th bar segment 225、6th bar segment 226、7th bar segment 227、8th bar segment 228 is cylinder bar segment，The largest outside diameter of the first bar segment 221，The equal external diameter being respectively less than the first bar segment 221 of external diameter of the 3rd bar segment 223 and the 5th bar segment 225，7th bar segment 227 external diameter is less than the 5th bar segment 225 external diameter，4th bar segment 224 external diameter is less than the 7th bar segment 227 external diameter，The external diameter of the 6th bar segment 226 is less than the external diameter of the 4th bar segment 224，8th bar segment 228 external diameter is minimum.
Second bar segment 222 of armature lever 220 is by upper and lower two circular cone bar segment 222a, 222b forms, wherein the conical surface of lower circular cone bar segment 222b in the second bar segment 222 is up-small and down-big transition Double-conical-surface, the conical surface of upper circular cone bar segment 222a in the second bar segment 222 is up big and down small taper seat, the upper end external diameter of the upper circular cone bar segment 2225 in the second bar segment is equal to the external diameter of the 3rd bar segment 223, the lower end external diameter of upper circular cone bar segment 222a in the second bar segment 222 is equal to the upper end external diameter of lower circular cone bar segment 222b in the second bar segment 222, the lower end external diameter of lower circular cone bar segment 222b in the second bar segment 222 is equal to the external diameter of the first bar segment 221；The cone angle of lower circular cone bar segment 222b in the second bar segment 222 is less than the cone angle of upper circular cone bar segment 222a.
The outline of armature 230 is made up of the upper flange portion 235 being coaxially disposed, lower cylindrical part 236, and the bottom surface in upper flange portion 235 is the face of being inclined upwardly, and extends to lower cylindrical part 236, and the center configuration of armature 230 has armature rod aperture 237.
The outer peripheral face of locking swivel nut 250 is provided with one end external screw thread 251, is internally provided with through hole 252, and the bottom surface of locking swivel nut 250 is provided with annular frustum 253 wide at the top and narrow at the bottom.
Referring particularly to Fig. 2 and Fig. 6, an axial oil leak hole of valve seat 261 it is provided with in valve seat 260, one valve seat draining side opening 262, three axial spill ports of valve seat 263, two valve seats axially position hole 264, one valve base center hole 265 and a valve seat axial cone seal hole 266, wherein valve base center hole 265 and valve seat axial cone seal hole 266 are coaxial and be positioned at the center of valve seat 260, valve base center hole 265 is positioned at the top in valve seat axial cone seal hole 266, the internal diameter in valve seat axial cone seal hole 266 is up-small and down-big, the upper-end inner diameter in valve seat axial cone seal hole 266 is equal to the internal diameter of valve base center hole 265；The aperture in valve seat axial cone seal hole 288 is more than the aperture of lower circular cone bar segment 222b in the second bar segment 222 of armature lever 220；263, two valve seats of three axial spill ports of valve seat axially position end face and the bottom surface of the through valve seat in hole 264 260；At the bottom of the hole of the axial oil leak hole of valve seat 261 concordant with the bottom surface of valve seat 260, the sidewall of the entrance oil leak hole axial with valve seat 261 of valve seat draining side opening 262 connects, and the outlet of valve seat draining side opening 262 connects with the sidewall of valve base center hole 265；The internal diameter of valve seat draining side opening 262 is less than the internal diameter of the axial oil leak hole of valve seat 261.
Referring particularly to Fig. 2, Fig. 7 and Fig. 8, adjustment pad centre bore 271 it is provided with in adjusting pad 270, one axial oil leak hole of adjusting pad sheet 272, three axial spill ports of adjusting pad sheet 273, two adjusting pad sheets axially position hole 274, adjusting the upper of pad 270, it is respectively arranged with three on lower surface to adjust on pads radially drain pan 275 and three and adjust under pads radially drain pan 276, three adjust radial direction drain pan 275 on pad and all connect with the hole wall adjusting pad centre bore 271 with the inner of radial direction drain pan 276 under three adjustment pads, three outer peripheral faces adjusting radially outer end and adjustment pad 270 that drain pan 275 adjusts radially drain pan 276 under pad with three on pad connect；The Kong Ding of three axial spill ports of adjusting pad sheet 273 connects with radial direction drain pan 276 under radial direction drain pan 275 on three adjustment pads and three adjustment pads respectively with at the bottom of hole；Adjustment pad oil leak hole 272 is the most from top to bottom divided into adjustment pad upper shaft to oil leak hole 272a and to adjust axial oil leak hole 272b under pad, wherein adjusts pad upper shaft to the internal diameter of oil leak hole 272a much smaller than the internal diameter adjusting axially oil leak hole 272b under pad；Two adjusting pad sheets axially position end face and the bottom surface of the through adjustment in hole 274 pad 270；Adjust pad centre bore 271 internal diameter slightly larger than valve seat axial cone seal hole 288 hold greatly internal diameter.
Referring particularly to Fig. 2, Figure 13, Figure 14, control spool 240 and be divided into the first shell of column the 241, second shell of column the 242, the 3rd shell of column 243 and the 4th shell of column 244 from bottom to top, first shell of column the 241, the 3rd shell of column 243 and the 4th shell of column 244 are cylindrical section, the external diameter of the 3rd shell of column 243 is more than the external diameter of the first shell of column the 241, the 4th shell of column 244, the external diameter of the first shell of column 241, equal to the external diameter of the 4th shell of column 244, spaced apart on the outer peripheral face of the first shell of column 241 is provided with some annular groove 241a.Second shell of column 242 is made up of upper and lower two circular cone shell of columns, wherein the upper circular cone shell of column 242a in the second shell of column 242 is up big and down small circular cone shell of column, the conical surface of upper circular cone shell of column 242a is made up of conical surface 242ab under conical surface 242aa on upper circular cone shell of column and upper circular cone shell of column, and under upper circular cone shell of column, the tapering α of conical surface 242ab is less than the tapering β of conical surface 242aa on upper circular cone shell of column；Lower circular cone shell of column 242b in second shell of column 242 is up-small and down-big circular cone shell of column；On the upper circular cone shell of column of the upper circular cone shell of column 242a in the second shell of column 242, the upper end external diameter of conical surface 242aa is equal to the external diameter of the 3rd shell of column 243, the lower end external diameter of the conical surface 242ab upper end external diameter equal to the lower circular cone shell of column 242b in the second shell of column 242 on the lower circular cone shell of column of the upper circular cone shell of column 242a in the second shell of column 242, the lower end external diameter of the lower circular cone shell of column 242b in the second shell of column 222 is equal to the external diameter of the first shell of column 241.
Referring particularly to Fig. 2 and Fig. 9, a upper control valve seat centre bore 281 it is provided with in upper control valve seat 280, one upper axial bellmouth of control valve seat 282, one upper axial oil leak hole of control valve seat 283, two upper control valve seats axially position hole 284, three upper axially mounted through holes of control valve seat 285, upper control valve seat centre bore 281 and the axial bellmouth of upper control valve seat 282 are coaxial and be positioned at the center of control valve seat 280, upper control valve seat centre bore 281 is positioned at the top of the axial bellmouth of control valve seat 282, the internal diameter of the axial bellmouth of upper control valve seat 282 is up-small and down-big, the small end inner diameter of the axial bellmouth of upper control valve seat 282 is equal to the internal diameter of upper control valve seat centre bore 281.The either flush of control valve seat 280 on the Kong Dingyu of upper control valve seat centre bore 281, holding greatly of the axial bellmouth of upper control valve seat 282 is concordant with the bottom surface of upper control valve seat 280.Being provided with control valve seat radially drain pan 286 on upper control valve seat 280 bottom surface, the big end of the axial bellmouth of upper control valve seat 282 is through with upper control valve seat radially drain pan 286；At the bottom of the hole of the axial oil leak hole of upper control valve seat 283 through with upper control valve seat radially drain pan 286, the either flush of control valve seat 280 on the Kong Dingyu of the axial oil leak hole of upper control valve seat 283；Two upper control valve seats axially position end face and the bottom surface of the upper through upper control valve seat 280 of the axially mounted through hole of control valve seat 285 in 284, three, hole.
Referring particularly to Fig. 2 and Figure 10, it is provided with the lower control valve seat fuel feed hole in 293, one, 292, lower control valve seat axial cone seal hole of 291, axial oil leak hole of lower control valve seat of a lower control valve seat centre bore 295, two lower control valve seats of 294, lower control valve seat oil-feed side opening in lower control valve seat 290 and axially positions 296, three, hole lower control valve seat axially mounted screw (not shown).
Lower control valve seat axial cone seal hole 293 and lower control valve seat centre bore 291 are co-axially located at the center of lower control valve seat 290 and lower control valve seat axial cone seal hole 293 is positioned at the top of lower control valve seat centre bore 291, the internal diameter in lower control valve seat axial cone seal hole 293 is up big and down small, the small end inner diameter in lower control valve seat axial cone seal hole 293 is equal to the internal diameter of lower control valve seat centre bore 291, and the tapering in lower control valve seat axial cone seal hole 293 is more than the tapering of conical surface 242ab under the upper circular cone shell of column 242a of the second shell of column in control spool 240.
Three lower control valve seats radially oil-recovery tank 297 it is evenly equipped with in the bottom surface of lower control valve seat 290, at the bottom of the hole of the inner and lower control valve seat centre bore 291 of three lower control valve seats radially oil-recovery tanks 297 through, the outer end of three lower control valve seat radial direction oil-recovery tanks 297 is through with the outer peripheral face of lower control valve seat 290.
292, two lower control valve seats of the lower axial oil leak hole of control valve seat axially position hole 296 by through to end face and the bottom surface of lower control valve seat 290, at the bottom of the hole of lower control valve seat fuel feed hole 294 concordant with the bottom surface of lower control valve seat 290, one end of lower control valve seat oil-feed side opening 295 connects with the hole wall of lower control valve seat fuel feed hole 294, and the other end of lower control valve seat oil-feed side opening 295 connects with the hole wall of lower control valve seat centre bore 291.
The maximum outside diameter of control valve spring seat 232 installs the internal diameter of lower opening 117 less than electromagnetic valve components.
Control valve spring pad 234 is provided with centre bore 234a.The external diameter of clamp 211 is more than armature rod aperture 237 internal diameter of armature 230 but the internal diameter less than electric magnet spring mounting hole 202b；The maximum outside diameter of clamp cover 210 internal diameter again smaller than electric magnet spring mounting hole 202b.Valve seat 260, adjustment pad 270, upper control valve seat 280, the maximum outside diameter of lower control valve seat 290 install the internal diameter of interstitial hole 116 less than the second electromagnetic valve components.
It is as follows that turning between electromagnetic valve components and oil injector body joins process:
The first step, control valve spring pad 234, control valve spring 233, control valve spring seat 232 are fitted into electromagnetic valve components the most successively and install in lower opening 117, wherein the bottom surface of control valve spring pad 234 and electromagnetic valve components contact at the bottom of installing the hole of lower opening 117, and through hole 234a oil duct middle with first in oil injector body 110 118 on control valve spring pad 234 is suitable for reading to align；The bottom of control valve spring 233 contacts with the end face of control valve spring pad 234, the top of control valve spring 233 is connected with the lower end of control valve spring seat 232, after control valve spring pad 234, control valve spring 233, control valve spring seat 232 assemble, owing to the maximum outside diameter of control valve spring seat 234 is less than the internal diameter of electromagnetic valve components installation lower opening 117, therefore between the maximum outside diameter and the internal diameter of electromagnetic valve components installation lower opening 117 of control valve spring seat 234, form the first gap Z1.
nullSecond step，The lower end of two control valve seat alignment pin (not shown)s is inserted into the second electromagnetic valve components install in the (not shown) of hole, the upper location of two at the bottom of interstitial hole 116 hole，Lower control valve seat 290 is then placed in the second electromagnetic valve components installs interstitial hole 116 and makes two control valve seat alignment pins axially position hole 296 through two lower control valve seats in lower control valve seat 290 lower control valve seat 290 is positioned，The lower control valve seat fuel feed hole 294 making the bottom surface of lower control valve seat 290 be in sealing contact and make at the bottom of installing the hole of interstitial hole 116 with the second electromagnetic valve components in lower control valve seat 290 aligns with the outlet of the first oil input channel 113 in oil injector body 110，The outlet of the entrance oil duct middle with second in oil injector body 110 119 of the axial oil leak hole of lower control valve seat 292 in lower control valve seat 290 is alignd，Owing to the maximum outside diameter of lower control valve seat 290 is less than the second electromagnetic valve components, the internal diameter of interstitial hole 116 is installed，Therefore between the maximum outside diameter and the internal diameter of the second electromagnetic valve components installation interstitial hole 116 of lower control valve seat 290, the second gap Z2 is formed，This second gap Z2 connects with the lower control valve seat radially oil-recovery tank 297 of lower control valve seat 290 bottom surface.
3rd step, the lower control valve seat axial cone seal hole 293 that is passed down through in lower control valve seat 290 of the first shell of column 241 of spool 240 will be controlled and be inserted in the lower control valve seat centre bore 291 in lower control valve seat 290, and form couple between outer peripheral face and the hole side face of the lower control valve seat centre bore 291 in lower control valve seat 290 of the first shell of column 241 controlling spool 240 and coordinate；The bottom surface of the first shell of column 241 controlling spool 240 contacts with the end face of control valve spring seat 232.Control the top of the conical seal (contact) face in the lower control valve seat axial cone seal hole 293 that the part conical surface in the upper circular cone shell of column 242a on the second shell of column 242 of spool 240 is in lower control valve seat 290, make to control the part conical surface of the upper circular cone shell of column 242a on the second shell of column 242 of spool 240, a M type high-voltage oil cavity M is formed between the face, hole in the lower control valve seat axial cone seal hole 293 in the conical surface of the lower circular cone shell of column 242b on the second shell of column 242 of control spool 240 and lower control valve seat 290, M type high-voltage oil cavity M connects with the lower control valve seat oil-feed side opening 295 in lower control valve seat 290.
null4th step，Upper control valve seat 280 is placed in the second electromagnetic valve components installs interstitial hole 116 and makes two control valve seat alignment pin (not shown)s axially position hole 284 through the upper control valve seat of two in upper control valve seat 280 upper control valve seat 280 is positioned，Make the 4th shell of column 244 of control spool 240 through the upper control valve seat centre bore 281 in upper control valve seat 280 simultaneously，Behind upper control valve seat 280 location，One of them on upper control valve seat 280 bottom surface lower control valve seat radially oil-recovery tank 286 pushes up with the hole of the axial oil leak hole of lower control valve seat 292 in lower control valve seat 290 and connects，Owing to the maximum outside diameter of upper control valve seat 280 is less than the second electromagnetic valve components, the internal diameter of interstitial hole 116 is installed，Therefore go up and form third space Z3 between the maximum outside diameter of control valve seat 280 and the internal diameter of the second electromagnetic valve components installation interstitial hole 116，The lower control valve seat of lower control valve seat 280 bottom surface radially oil-recovery tank 286 connects with third space Z3.After additionally going up control valve seat 280 location, the upper axially mounted through hole of control valve seat 285 of in upper control valve seat 280 three aligns respectively with three lower control valve seat axially mounted screw (not shown)s in lower control valve seat 292, then three screws are from top to bottom each passed through in three axially mounted screws of lower control valve seat that on three in upper control valve seat 280, the axially mounted through hole of control valve seat 285 is screwed in lower control valve seat 290, make upper and lower control valve seat 280,290 link together.
4th step, adjustment pad 270 is put into the second electromagnetic valve components and installs in interstitial hole 116, and make the upper end of two control valve seat alignment pin (not shown)s axially position hole 274 through two the adjusting pad sheets adjusted on pad 270 to position adjusting pad 270, after adjustment pad 270 is put into position and is positioned, the bottom surface adjusting pad 270 contacts with the end face of upper control valve seat 280, and make to push up with the hole of the axial oil leak hole of upper control valve seat 283 in upper control valve seat 280 at the bottom of the hole adjusting axially oil leak hole 272b under pad in adjustment pad 270 to connect, the top simultaneously making the 4th shell of column 244 of control spool 240 extend in the adjustment pad centre bore 271 adjusting pad 270；Owing to adjusting the maximum outside diameter internal diameter less than the second electromagnetic valve components installation interstitial hole 116 of pad 270, therefore install at the maximum outside diameter and the second electromagnetic valve components adjusting pad 270 and form the 4th gap Z4 between the internal diameter of interstitial hole 116.
5th step, first bar segment the 221, second bar segment the 222, the 3rd bar segment 223 of armature lever 220 is from top to bottom sequentially passed through the valve base center hole 265 in valve seat 260, armature lever 220 and valve seat 260 are combined into an assembly, wherein the 3rd bar segment 223 of armature lever 220 coordinates with valve base center hole 265 couple in valve seat 260, and the second bar segment 222 of armature lever 220 exports corresponding with the valve seat draining side opening 262 in valve seat 260；Assembly is put into the second electromagnetic valve components again install in interstitial hole 116, and make the upper end of two control valve seat alignment pin (not shown)s axially position hole 264 through two valve seats in valve seat 260 valve seat 260 is positioned.
After assembly is placed to position and is positioned, the bottom surface of valve seat 260 contacts with the end face adjusting pad 270, and make to connect to top, oil leak hole 272a hole with the adjustment pad upper shaft adjusted in pad 270 at the bottom of the hole of the axial oil leak hole of the valve seat in valve seat 260 261, make to connect with radial direction drain pan 275 on three the adjustment pads adjusted on pad 270 end face respectively at the bottom of the hole of three axial spill ports of valve seat 263 in valve seat 260 simultaneously.First bar segment 221 of armature lever 220 is inserted into and adjusts adjusting in pad centre bore 271 and making the bottom surface of the first bar segment 221 of armature lever 220 contact with the end face of control spool 240 the 4th shell of column 244 of pad 270；Owing to the maximum outside diameter of valve seat 260 is less than the internal diameter of the second electromagnetic valve components installation interstitial hole 116, therefore between the maximum outside diameter and the internal diameter of the second electromagnetic valve components installation interstitial hole 116 of valve seat 260, form the 5th gap Z5.
6th step, after treating that valve seat 260 assembles, locking swivel nut 250 was overlapped armature lever 220 again and the first electromagnetic valve components of making the external screw thread 251 of its outer peripheral face be screwed in oil injector body 110 was installed in the first female thread 115a in interstitial hole 115, after locking swivel nut 250 is screwed into position, the annular boss 253 of locking swivel nut 250 bottom surface is by valve seat 260, adjust pad 270, upper control valve seat 280, the second electromagnetic valve components that lower control valve seat 290 is pressed in oil injector body 110 is installed in interstitial hole 116, and make the bottom surface of lower control valve seat 290 that each self-forming sealing at the bottom of the hole of interstitial hole 116 to be installed with the second electromagnetic valve components；Now connect bottom the Kong Dingyu locking of three axial spill ports of valve seat 273 in valve seat 260 through hole 252 within swivel nut 250.
6th step, is placed on electric magnet pad 205 in electromagnetic valve components installs hole 114 and makes the bottom surface of electric magnet pad 205 install with electromagnetic valve components at the bottom of the hole in hole 114 and contact；Then the upper end of armature buffer spring 231 is enclosed within the lower cylindrical part 236 of armature 230 outline one assembly of formation, then it is enclosed within the armature rod aperture 237 of armature 230 in the 5th bar segment 225 of armature lever 220 and makes between armature rod aperture 237 and the 5th bar segment 225 of armature lever 220 to form tight fit, the assembly that armature 230 and armature buffer spring 231 are formed is installed after putting in place, the bottom of armature buffer spring 231 is inserted in locking through hole 252 within swivel nut 250 and makes the bottom of armature buffer spring 231 contact with the end face of valve seat 260, the top of armature buffer spring 231 contacts with the bottom surface, upper flange portion 235 of armature 230.
7th step, clamp 211 is stuck in the 6th bar segment 226 of armature lever 220, then by clamp cover 210, Open Side Down is enclosed within the 7th bar segment 227 of armature lever 220,7th bar segment 227 and the clamp 211 of armature lever 220 are wrapped, now the bottom surface of clamp 211 contacts with the end face in the upper flange portion 236 of armature 230, and the end face of clamp 211 contacts with the bottom surface of the 7th bar segment 227 of armature lever 220.
8th step, electric magnet O RunddichtringO 206 is snapped in the basifacial closure gasket groove 203b of electromagnet housing 203 periphery, then electric magnet spring washer 207 is put in the electric magnet spring mounting hole 202b within electric magnet 202 and made the end face of electric magnet spring washer 207 and the hole top contact of electric magnet spring mounting hole 202b；Then electric magnet spring 208 put in electric magnet spring mounting hole 202b and make the top of electric magnet spring 208 contact with the bottom surface of electric magnet spring washer 207.
null9th step，By electric magnet 202、Electromagnet housing 203、Electric magnet spring washer 207、Electric magnet spring 208、The assembly of electric magnet O RunddichtringO 206 composition turns the electromagnetic valve components being buckled in oil injector body 110 upper end around and installs in hole 114，And the electromagnetic valve components making the lower end of electromagnet housing 203 be inserted in oil injector body 110 upper end installs in hole 114，During installation，Electric magnet spring 208 must be made coaxial with armature lever 220，The 8th bar segment 228 making armature lever 220 is inserted in the lower end of electric magnet spring 208，The upper surface of the 7th bar segment 227 simultaneously making armature lever 220 contacts with the bottom surface of electric magnet spring 208，The hole end face of armature installing hole 202c contacts with upper flange portion 235 end face of armature 230，The bottom surface of electromagnet housing 203 and the end face pre-contact of electric magnet pad 205，After the above step is finished，The flange 204a very tight for electromagnetism cap 204 being enclosed within electromagnet housing 203 and being made electromagnetism very tight cap 204 upper end is pressed on the step surface 203a of electromagnet housing 203 periphery，Again the second female thread 204b of very tight for electromagnetism cap 204 lower end is spun in the upper external thread 111 of oil injector body 110 upper end，Pretightning force on request screws the very tight cap of electromagnetism 204 and can be arranged on oil injector body 110 by electromagnet housing 203；Now the end face of electric magnet pad 205 contacts with the bottom surface of electromagnet housing 203, electric magnet O RunddichtringO 206 is installed in electromagnet housing 203 lower end periphery face and electromagnetic valve components to be formed between the inner hole surface in hole 114 and is sealed, armature 230 is positioned at armature installing hole 202c, and the 7th bar segment the 227, the 8th bar segment 228 of armature lever 220, clamp 211, clamp cover 210, electric magnet spring washer 207, electric magnet spring 208 are positioned in the electric magnet spring mounting hole 202b within electric magnet 202.
Atomizer parts 300 include pressure spring pad 310, pressure spring 320, needle-valve body 330, needle-valve 330, nozzle cap nut 350, push rod 360, transition block 370；
Pressure spring pad 310 is provided with through hole 311；The unlatching pressure of atomizer parts 300 can be regulated by the thickness of regulation pressure spring pad 310.
It is provided with central ejector rod in transition block 370 and takes up hole 371, tapered centre hole 372, center needle-valve jack 373 and transition oil duct 374, central ejector rod takes up hole 371, tapered centre hole 372, center needle-valve jack 373 are co-axially located at the center of transition block 370, wherein central ejector rod takes up hole 371 and is positioned at the top in tapered centre hole 372, and tapered centre hole 372 is positioned at the top of center needle-valve jack 373；The end face and bottom surface of transition block 370 are configured with hole, some upper and lower transition location (not shown)；Central ejector rod takes up the internal diameter maximum outside diameter more than push rod 360 in hole 371.
The outline of needle-valve body 330 is from top to bottom by upper cylindrical section 331, middle circle shell of column 332 and lower cylindrical section 333 are constituted, upper cylindrical section 331 top side configuration at needle-valve body 330 has hole, needle-valve body location (not shown), in needle-valve body 330, center is had needle-valve to position hole 334 by lower and lower arranged coaxial, contain oil pocket 335, nozzle opening 336, needle-valve taper hole 337 and atomizer 338, in needle-valve body 330, additionally it is additionally provided with oil-feed inclined hole 339, the outlet of oil-feed inclined hole 339 connects with containing oil pocket 335, the entrance of oil-feed inclined hole 339 connects with upper cylindrical section 331 end face of needle-valve body 330.
Needle-valve 340 is from top to bottom bored bar portion 344 by the first Needle shaft portion 343 of the 341, second Needle shaft portion the 342, the 3rd of Needle shaft portion and needle-valve and is constituted, the external diameter in the first Needle shaft portion 341 is less than the external diameter in the second Needle shaft portion 342, the external diameter in the 3rd Needle shaft portion 343 is less than the external diameter in the second Needle shaft portion 342, and needle-valve cone bar portion 344 is up big and down small.
Oil injector body connecting hole the 351, first needle-valve body installing hole the 352, second needle-valve body installing hole 353 the most coaxially it is disposed with in nozzle cap nut 350, the internal diameter of oil injector body connecting hole 351 is more than the internal diameter of the first needle-valve body installing hole 352, and the internal diameter of the first needle-valve body installing hole 352 is more than the internal diameter of the second needle-valve body installing hole 353；One section of female thread 351a it is configured with in the upper end of oil injector body connecting hole 351.
Push rod 360 is made up of the first push rod section 361 and the second push rod section 362, and the first push rod section 361 is positioned at the top of the second push rod section 362 and the diameter diameter less than the second push rod section 362；The diameter of the second push rod section 362 takes up the internal diameter in hole 371 less than central ejector rod.
During assembling, first pressure spring pad 310 and pressure spring 320 are placed in the atomizer member mounting holes 118a of oil injector body 110 bottom, the end face of pressure spring pad 310 contacts with the hole end face of atomizer member mounting holes 118a, the upper end of pressure spring 320 contacts with the bottom surface of pressure spring pad 310, in then the first push rod section 361 of push rod 360 being pressed into the lower end of pressure spring 310 and make the end face of the second push rod section 362 contact with the bottom face of pressure spring 320.
Then in hole, the lower location (not shown) upper end of some transition block alignment pin (not shown)s being inserted on oil injector body 110 bottom surface, in then transition block 370 is arranged on the bottom surface of oil injector body 110 and makes hole, the upper transition location (not shown) that some transition block alignment pin (not shown) lower ends are inserted on transition block 370 end face, transition block 370 is positioned, make transition block 370 transition oil duct 374 suitable for reading and oil injector body 110 in the end opening of the second middle oil duct 119 align, make the central ejector rod in transition block 370 take up hole 371 to be enclosed within the second push rod section 360 of push rod 360；In hole, the lower transition location the (not shown) again upper end of some needle-valve body alignment pin (not shown)s being inserted on transition block 360 bottom surface.
Then needle-valve 340 is inserted into the hole 334, needle-valve location of needle-valve body 330, contains in oil pocket 335, nozzle opening 336, needle-valve taper hole 337, the end face of needle-valve body 330 is exposed in the first Needle shaft portion 341 on needle-valve 340, it is secondary that second Needle shaft portion 342 and hole 334, needle-valve location constitute closely spaced couple, 3rd Needle shaft portion 343 and nozzle opening 336 matched in clearance, the conical seal (contact) face in needle-valve cone bar portion 344 coordinates with the cone seal face seal of needle-valve taper hole 337.
Needle-valve body 330 is positioned in being arranged on the bottom surface of transition block 360 and make hole, the needle-valve body location (not shown) that some needle-valve body alignment pin (not shown) lower ends are inserted on needle-valve body 330 end face by the end face of the needle-valve body 330 that then will be equipped with needle-valve 340, the center needle-valve jack 273 that the first Needle shaft portion 341 making needle-valve 330 is inserted into transition block 370 is interior and concentric, makes the entrance of the oil-feed inclined hole 339 in needle-valve body 330 align with transition oil duct 374 end opening in transition block 370.
The female thread 351a of oil injector body connecting hole 351 upper end that nozzle cap nut 350 is finally from bottom to top enclosed within needle-valve body 330 and makes this nozzle cap nut 350 spins with the lower external thread 112 of oil injector body 110 bottom, after nozzle cap nut 350 is screwed into position, the first needle-valve body installing hole 352 in nozzle cap nut 350 coordinates with the upper cylindrical section 331 of needle-valve body 330, at the bottom of the hole of the first needle-valve body installing hole 352 in nozzle cap nut 350, the bottom surface with the upper cylindrical section 331 of needle-valve body 330 contacts, the second needle-valve body installing hole 353 in nozzle cap nut 350 coordinates with the middle circle shell of column 332 of needle-valve body 330, by transition block 370, needle-valve body 330 is closely fitted on the bottom surface of oil injector body 110.
Work process and the principle of the present invention are as follows:
As depicted in figs. 1 and 2, electric-controlled fuel injector of the present invention is connected with common rail pipe (not shown) by oil inlet pipe (not shown) by inlet connector 130, filter from the high pressure fuel in common rail pipe through clearance filter 140, after through the first oil input channel 113 of oil injector body 110 and the lower control valve seat fuel feed hole 294 of lower control valve seat 290, one lower control valve seat oil-feed side opening 295 enters the part conical surface of the upper circular cone shell of column 242a on the second shell of column 242 controlling spool 240, in the M type high-voltage oil cavity M formed between the face, hole in the lower control valve seat axial cone seal hole 293 in the conical surface of the lower circular cone shell of column 242b on the second shell of column 242 of control spool 240 and lower control valve seat 290.
nullAs shown in Figure 5，Lower control valve seat axial cone seal hole 293 cone angle 293 α tapering in lower control valve seat 290 is less than the tapering of conical surface 242aa on the upper circular cone shell of column 242a in the second shell of column 242 controlling spool 240，The sealing cone inner diameter edge in the lower control valve seat axial cone seal hole 293 made on the upper circular cone shell of column 242a in the second shell of column 242 of control spool 240 in conical surface 242aa and lower control valve seat 290 forms seal band k，Seal band k normal direction is coaxial with lower valve base centre bore 291 and control spool 240，On the upper circular cone shell of column 242a of seal band k and the axially vertical component of stress surface (direction is vertically upward) controlled between spool 240 second shell of column 242 end and control spool 240 second bar segment 240, the stress surface vertical component (direction is vertically downward) between conical surface 242aa initiating terminal and end is the most in opposite direction，Equal in magnitude，So the M type high-voltage oil cavity M fuel pressure formed to control spool 240 radial forces to make a concerted effort be zero，Therefore controlling spool 240 is fuel pressure self-balancing type structure.Just because of controlling the fuel pressure self-balancing type structure design of spool 240, when fuel injector is opened, controlling when spool 240 starts without overcoming the hydraulic action of high pressure fuel, only need to overcome making a concerted effort of each acting force of the spring of Electromagnetic Control valve member.The self-balancing type structure design controlling spool 240 need not consider the change of fuel pressure, oil spout can be improved and open response speed, reduce and control spool and the armature lever unlatching requirement to electromagnetic force, reduce the peak value of solenoid actuated electric current when fuel injector is opened, improve service life and the reliability of fuel injector electric magnet.
The initial tension of spring assuming electromagnetic valve spring 208 is F1。F1Method for designing as follows:
F1=F2+F3+F
In formula:
F1Initial tension of spring for electromagnetic valve spring 208；
F2Initial tension of spring for control valve spring 233；
F is the value that exceeds of electromagnetic valve spring 208 initial tension of spring, and design F is more than zero；The size of F can affect the response speed of fuel injector.F is the biggest, and oil spout is opened and postponed to increase, and oil spout is closed and postponed to reduce；F is the least, and oil spout is opened and postponed to reduce, and oil spout is closed and postponed to increase；Therefore, the value of appropriate design F can optimize the response speed of common-rail injector of the present invention.
As shown in Figure 5, when electric magnet 202 no power, have fuel pressure self-balance structure controls spool 240 under the force action of each acting force of the spring of Electromagnetic Control valve member, conical surface 242aa on the upper circular cone shell of column 242a in the second shell of column 242 of control spool 240 is made to contact formation seal band k with the sealing cone inner diameter edge in the lower control valve seat axial cone seal hole 293 in lower control valve seat 290, this seal band k has blocked M type high-voltage oil cavity M and the radially drain pan 286 of the upper control valve seat in upper control valve seat 280, the axial oil leak hole of lower control valve seat 292 of lower control valve seat 290, second middle oil duct 119 of oil injector body 110, needle-valve body 330 is contained oil pocket 335 and is connected.Needle-valve 340 is closed under the initial tension of spring effect of pressure spring 320, fuel injector not oil spout.
When electric magnet 202 is energized, electric magnet 202 produces rapidly electromagnetic force to armature 230, design electromagnetic force is more than F, armature 230 drives armature lever 220 to move to electric magnet 202 direction, control spool 240 also to move to electric magnet 202 direction simultaneously, seal band k disappears, and high pressure fuel releases the upper control valve seat entered in upper control valve seat 280 radially drain pan 286.
nullWhen armature lever 220 moves to electric magnet 202 direction，High pressure fuel inside M type high-voltage oil cavity M is by the radially drain pan 286 of the upper control valve seat in upper control valve seat 280、The axial oil leak hole of upper control valve seat 283、Adjust axial oil leak hole 272b under pad、Adjust pad upper shaft to oil leak hole 272a、The axial oil leak hole of valve seat 261、Valve seat draining side opening 262 enters armature lever 220 second bar segment 222 and (sees Fig. 2 and Fig. 4 in the annular seal space N of valve base center hole 265 formation，Valve base center hole 265 forms couple radial seal with the 3rd bar segment 223 of armature lever 220，The sealing cone in valve seat axial cone seal hole 266 is in sealing contact formation seal band K1 with the sealing cone of lower circular cone bar segment 222b in the second bar segment 222 of armature lever 220)，Owing to adjusting pad upper shaft to oil leak hole 272a diameter the least (diameter much smaller than adjusting axially oil leak hole 272b under pad)，Throttling is produced during axial oil leak hole 272a on the adjusted pad of high pressure fuel，Flow resistance is the biggest，Therefore the fuel oil flowing into the axial oil leak hole of this valve seat 261 compare flow into lower passage (seeing below) fuel oil the most a lot，When end of injection，Fuel oil in the axial oil leak hole of this valve seat 261 and annular seal space N flows out fuel injector，Less owing to entering fuel oil，Flow out fuel oil the most little，Therefore this design effectively reduces recirculating oil quantity.
Move to electric magnet 202 direction owing to controlling spool 240, seal band k disappears, M type high-voltage oil cavity M connects with upper control valve seat radially drain pan 286, and the high pressure fuel in M type high-voltage oil cavity M is by oil-feed inclined hole 339, Sheng oil pocket 335 (lower passage) in the transition oil duct 374 in upper control valve seat radially drain pan 286 the entrance lower axial oil leak hole of control valve seat 292, the second middle oil duct 119 of oil injector body 110, transition block 370, needle-valve body 330.Along with the Sheng oil pocket 335 of the needle-valve body 330 of fuel oil entrance endlessly in common rail pipe, the oil pressure contained in oil pocket 335 rises rapidly, when the oil pressure containing oil pocket 335 is increased to make needle-valve 340 overcome the initial tension of spring of pressure spring 320 to move up, needle-valve 340 is opened, fuel injection beginning.
When electric magnet 202 terminates energising, the electromagnetic force of armature 230 is rapidly disappeared by electric magnet 202, control spool 240 to move to the direction away from electric magnet 202 under the force action of each acting force of the spring of Electromagnetic Control valve member, make conical surface 242aa on the upper circular cone shell of column 242a in the second shell of column 242 of control spool 240 again contact formation seal band k with the sealing cone inner diameter edge in the lower control valve seat axial cone seal hole 293 in lower control valve seat 290, thus blocked M type high-voltage oil cavity M and communicated with the Sheng oil pocket 335 in needle-valve body 330.
Control spool 240 to move to the direction away from electric magnet 202 under the force action of each acting force of the spring of Electromagnetic Control valve member, make conical surface 242aa on the upper circular cone shell of column 242a in the second shell of column 242 of control spool 240 again contact formation seal band k with the sealing cone inner diameter edge in the lower control valve seat axial cone seal hole 293 in lower control valve seat 290, thus blocked M type high-voltage oil cavity M and communicated with upper control valve seat radially drain pan 286；nullMeanwhile，Seal band k1 disappears，Annular seal space N and adjustment pad centre bore 271、Adjust radial direction drain pan 275 on pad、Adjust radial direction drain pan 276 under pad、Second electromagnetic valve components installs interstitial hole 116、Electromagnet component is installed hole 114 and is connected，And upper control valve seat radially drain pan 286 now with the lower axial oil leak hole of control valve seat 292、Second middle oil duct 119 of oil injector body 110、Transition oil duct 374 in transition block 370、Oil-feed inclined hole 339 in needle-valve body 330、Contain oil pocket 335 (lower passage) connection，And then above-mentioned drainback passage connects completely，Do not spray the fuel oil oil returning pipe joint installing hole 202a through entering in electric magnet 202 with upper channel、Oil returning pipe joint 209、In oil return pipe (not shown)，When containing oil pocket 335 pressure and being persistently reduced to overcome the spring force that pressure spring 320 produces，Needle-valve 330 is closed，End of injection.
From above-mentioned fuel injector operation principle, the electromagnetic valve components of the present invention uses the residual pressure containing oil pocket 335 that the design of two-position three-way electromagnetic control valve oil return function can effectively reduce after electric magnet 202 power-off in needle-valve body 330, needle-valve 340 is closed rapider, injection delay shortens, and fuel injector response speed improves.Meanwhile, the secondary injection being harmful to can effectively be prevented.And the pressure oscillation of oil pocket 335 intracavity such as grade is contained in the design of adjusting pad sheet throttle orifice when can reduce oil spout, effectively reduce single injection event recirculating oil quantity.
nullAs depicted in figs. 1 and 2，Armature lever 220 and valve seat 260、Control spool 240 and upper control valve seat 280、Control spool 240 and lower control valve seat 290、It is secondary that needle-valve 340 and needle-valve body 330 are closely spaced couple，During fuel injector work，High pressure fuel can leak into valve seat 260 on a small quantity by the gap between couple pair and adjust pad 270、Adjust pad 270 and upper control valve seat 280、Upper control valve seat 280 and lower control valve seat 290、Second electromagnetic valve components of lower control valve seat 290 and oil injector body 110 is installed in the gap between interstitial hole 116 bottom surface，End face seal is affected owing to crossing multiple fuel and assemble heating for reducing，The present invention respectively designs radial direction drain pan 275 on adjustment pad in the upper and lower surface adjusting pad 270、Adjust radial direction drain pan 276 under pad、At three lower control valve seats of lower control valve seat 290 lower surface design radially oil-recovery tank 297、On upper control valve seat 280 lower surface design, control valve seat radially drain pan 286 is to solve this problem，Make the fuel oil in the first middle oil duct 118 by three lower control valve seats of lower control valve seat 290 lower surface radially oil-recovery tank 297、First gap Z1、Second gap Z2、Third space Z3、4th gap Z4、Three axial spill ports of valve seat 263 in valve seat 260、Locking through hole 252 within swivel nut 250、Armature installing hole 202c within electric magnet 202、Electric magnet spring mounting hole 202b is flowed in the oil returning pipe joint installing hole 202a within electric magnet 202，And flowed out by oil returning pipe joint 209.
As shown in Figure 2, the gauge changing adjustment pad 270 can adjust control spool 240 and the stroke of armature lever 220, stroke is the biggest, oil return circulation area and high pressure oil-feed circulation area all increase, be conducive to improving the hydraulic response speed of fuel injector, but control spool 240 and the mechanical response speed of armature lever 220 can be reduced.Therefore the stroke of appropriate design control spool 240 and armature lever 220 can optimize the oil spout response performance of common-rail injector of the present invention.
As depicted in figs. 1 and 2, the gauge changing electric magnet packing ring 205 can adjust the air gap of armature 230.
As it is shown on figure 3, the gauge changing pressure spring pad 310 can change the pretightning force of pressure spring 320, thus change the unlatching pressure of needle-valve.
The electromotor applying common-rail injector of the present invention can obtain preferable injection timing by the energising initial point of regulating magnet 202, can change per engine cycle distributive value by length conduction time of regulating magnet 202.

Claims (1)

1. New Common Rail fuel injector, including oil injector body parts, electromagnet component and atomizer parts；
Described oil injector body parts include an oil injector body, inlet connector seal washer, inlet connector and clearance filter, and the upper end of described oil injector body is provided with upper external thread, and the lower end of oil injector body is provided with lower external thread；Described oil injector body bosom position on the upper side is provided with inlet connector installing hole, the first oil input channel, electromagnetic valve components installing hole, described electromagnetic valve components installing hole is divided into and is from top to bottom coaxially disposed and is sequentially communicated and electromagnetic valve components that internal diameter is sequentially reduced installs hole, the first electromagnetic valve components installs interstitial hole, the second electromagnetic valve components installs interstitial hole and electromagnetic valve components installs lower opening, is provided with one section of first female thread in described first electromagnetic valve components installs interstitial hole；At the bottom of the entrance of described first oil input channel and the hole of described inlet connector installing hole through, through at the bottom of the outlet of the first oil input channel and the hole of described second electromagnetic valve components installation interstitial hole；Below described oil injector body bosom, position is provided with the first middle oil duct, atomizer member mounting holes and the second middle oil duct, described first middle oil duct and described atomizer member mounting holes coaxially and are mutually communicated, first middle oil duct is positioned at above described atomizer member mounting holes, and described first middle oil duct and the second middle oil duct are parallel to each other；Described first middle oil duct and described electromagnetic valve components are installed coaxial and described first middle oil duct the top of lower opening and are connected at the bottom of the hole of described electromagnetic valve components installation lower opening, the bottom of described atomizer member mounting holes is all concordant with the bottom of described oil injector body with the bottom of described second middle oil duct, and the top of the second middle oil duct is installed at the bottom of the hole of interstitial hole through with described second electromagnetic valve components；Described inlet connector is arranged in described inlet connector installing hole, and described inlet connector is connected with oil inlet pipe；Between described inlet connector seal washer is arranged at the bottom of the bottom of described inlet connector and the hole of described inlet connector installing hole, it is respectively arranged with the first fuel feed hole and the second fuel feed hole inside described inlet connector inside and inlet connector seal washer, described first fuel feed hole is connected with the entrance of described first oil input channel by described second fuel feed hole, and described clearance filter is arranged in described first fuel feed hole；At the bottom of described second electromagnetic valve components installs the hole of interstitial hole, it is configured with on two hole, location, is configured with hole, some lower location in the bottom surface of described oil injector body；
Described electromagnetic valve components includes the very tight cap of electric magnet plug, electric magnet, electromagnet housing, electromagnetism, electric magnet pad, electric magnet O RunddichtringO, electric magnet spring washer, electric magnet spring, oil returning pipe joint, clamp cover, clamp, armature lever, armature, armature buffer spring, controls spool, locking swivel nut, valve seat, regulation pad, upper control valve seat, lower control valve seat, control valve spring seat, control valve spring, control valve spring pad；
Described electric magnet is arranged in described electromagnet housing, and described electric magnet plug is arranged on described electromagnet housing and electrically connects with the coil in described electric magnet；Be configured with step surface in the peripheral appropriate location of described electromagnet housing, the upper end of the very tight cap of described electromagnetism is configured with a flange, and lower end is provided with one second female thread；Described electromagnet housing outer peripheral face bottom is provided with a closure gasket groove；
From top to bottom being coaxially arranged with oil returning pipe joint installing hole, electric magnet spring mounting hole and the armature installing hole being interconnected inside described electric magnet, the internal diameter of described armature installing hole is more than the internal diameter of described electric magnet spring mounting hole；Being provided with oil returning pipe joint in described oil returning pipe joint installing hole, described oil returning pipe joint is connected with oil return pipe；It is provided with oil return through-hole in described electric magnet spring washer；
Described armature lever is divided into the first bar segment being coaxially disposed from the bottom to top, second bar segment, 3rd bar segment, 4th bar segment, 5th bar segment, 6th bar segment, 7th bar segment, 8th bar segment composition, wherein the first bar segment, 3rd bar segment, 4th bar segment, 5th bar segment, 6th bar segment, 7th bar segment, 8th bar segment is cylinder bar segment, the largest outside diameter of the first bar segment, the equal external diameter being respectively less than described first bar segment of external diameter of the 3rd bar segment and the 5th bar segment, 7th bar segment external diameter is less than the 5th bar segment external diameter, 4th bar segment external diameter is less than the 7th bar segment external diameter, the external diameter of the 6th bar segment is less than the external diameter of the 4th bar segment, 8th bar segment external diameter is minimum；Second bar segment is made up of upper and lower two circular cone bar segment, wherein the conical surface of the lower circular cone bar segment in the second bar segment is up-small and down-big transition Double-conical-surface, the conical surface of the upper circular cone bar segment in the second bar segment is up big and down small taper seat, the upper end external diameter of the upper circular cone bar segment in the second bar segment is equal to the external diameter of described 3rd bar segment, the lower end external diameter of the upper circular cone bar segment in the second bar segment is equal to the upper end external diameter of the lower circular cone bar segment in described second bar segment, and the lower end external diameter of the lower circular cone bar segment in described second bar segment is equal to the external diameter of the first bar segment；The cone angle of the lower circular cone bar segment in described second bar segment is less than the cone angle of the upper circular cone bar segment in the second bar segment；
The outline of described armature is made up of the upper flange portion being coaxially disposed, lower cylindrical part, and the bottom surface in upper flange portion is the face of being inclined upwardly, and extends to lower cylindrical part, and the center configuration of described armature has armature rod aperture；
The outer peripheral face of described locking swivel nut is provided with one end external screw thread, is internally provided with through hole, and the bottom surface of described locking swivel nut is provided with annular frustum wide at the top and narrow at the bottom；
Be provided with an axial oil leak hole of valve seat in described valve seat, valve seat draining side opening, three the axial spill ports of valve seat, two valve seats axially position hole, a valve base center hole and a valve seat axial cone seal hole, wherein said valve base center hole and valve seat axial cone seal hole are coaxial and are positioned at the center of described valve seat, described valve base center hole is positioned at the top in described valve seat axial cone seal hole, the internal diameter in described valve seat axial cone seal hole is up-small and down-big, and the upper-end inner diameter in valve seat axial cone seal hole is equal to the internal diameter of described valve base center hole；The aperture in described valve seat axial cone seal hole is more than the aperture of the lower circular cone bar segment in the second bar segment of described armature lever；Described three axial spill ports of valve seat, two valve seats axially position end face and the bottom surface of the through described valve seat in hole；At the bottom of the hole of the axial oil leak hole of described valve seat concordant with the bottom surface of described valve seat, the sidewall of the entrance oil leak hole axial with described valve seat of described valve seat draining side opening connects, and the outlet of valve seat draining side opening connects with the sidewall of described valve base center hole；The internal diameter of described valve seat draining side opening is less than the internal diameter of the axial oil leak hole of described valve seat；
Adjustment pad centre bore it is provided with in described adjustment pad, one axial oil leak hole of adjusting pad sheet, three axial spill ports of adjusting pad sheet, two adjusting pad sheets axially position hole, upper at described adjustment pad, it is respectively arranged with three on lower surface to adjust on pads radially drain pan and three and adjust under pads radially drain pan, three adjust on pads radially drain pan and three inner all hole walls with described adjustment pad centre bore adjusting under pads radially drain pan connect, three adjust on pads radially drain pan and three and adjust under pads the radially outer end of drain pan and connect with the outer peripheral face of described adjustment pad；The Kong Ding of described three axial spill ports of adjusting pad sheet connects with radial direction drain pan under radial direction drain pan on described three adjustment pads and three adjustment pads respectively with at the bottom of hole；Described adjustment pad oil leak hole is the most from top to bottom divided into adjustment pad upper shaft to oil leak hole and to adjust axial oil leak hole under pad, and wherein said adjustment pad upper shaft is less than the internal diameter of axially oil leak hole under described adjustment pad to the internal diameter of oil leak hole；Described two adjusting pad sheets axially position end face and the bottom surface of the through described adjustment pad in hole；The internal diameter of described adjustment pad centre bore holds greatly internal diameter slightly larger than described valve seat axial cone seal hole；
Described control spool is divided into the first shell of column, the second shell of column, the 3rd shell of column and the 4th shell of column from bottom to top, first shell of column, the 3rd shell of column and the 4th shell of column are cylindrical section, the external diameter of the 3rd shell of column is more than the first shell of column, the external diameter of the 4th shell of column, the external diameter of the first shell of column, equal to the external diameter of the 4th shell of column, spaced apart on the outer peripheral face of the first shell of column is provided with some annular grooves；Described second shell of column is made up of upper and lower two circular cone shell of columns, wherein the upper circular cone shell of column in the second shell of column is up big and down small circular cone shell of column, the conical surface of upper circular cone shell of column is made up of the conical surface under the conical surface on upper circular cone shell of column and upper circular cone shell of column, and under upper circular cone shell of column, the tapering of the conical surface is less than the tapering of the conical surface on upper circular cone shell of column；Lower circular cone shell of column in second shell of column is up-small and down-big circular cone shell of column；On the upper circular cone shell of column of the upper circular cone shell of column in the second shell of column, the upper end external diameter of the conical surface is equal to the external diameter of described 3rd shell of column, the lower end external diameter of the upper circular cone shell of column in the second shell of column is equal to the upper end external diameter of the lower circular cone shell of column in described second shell of column, and the lower end external diameter of the lower circular cone shell of column in described second shell of column is equal to the external diameter of the first shell of column；
A upper control valve seat centre bore it is provided with in described upper control valve seat, one upper axial bellmouth of control valve seat, one upper axial oil leak hole of control valve seat, two upper control valve seats axially position hole, three upper axially mounted through holes of control valve seat, described upper control valve seat centre bore and the axial bellmouth of upper control valve seat are coaxial and are positioned at the center of described upper control valve seat, described upper control valve seat centre bore is positioned at the top of the described axial bellmouth of upper control valve seat, the internal diameter of the described axial bellmouth of upper control valve seat is up-small and down-big, the small end inner diameter of the axial bellmouth of upper control valve seat is equal to the internal diameter of described upper control valve seat centre bore；The either flush of upper control valve seat described in the Kong Dingyu of described upper control valve seat centre bore, holding greatly of the described axial bellmouth of upper control valve seat is concordant with the bottom surface of described upper control valve seat；Being provided with control valve seat radially drain pan on described on control valve seat bottom surface, the big end of the described axial bellmouth of upper control valve seat is through with described upper control valve seat radially drain pan；At the bottom of the hole of the described axial oil leak hole of upper control valve seat through with described upper control valve seat radially drain pan, the either flush of upper control valve seat described in the Kong Dingyu of the axial oil leak hole of upper control valve seat；In said two, control valve seat axially positions hole, the end face of three upper through described upper control valve seats of the axially mounted through hole of control valve seat and bottom surface；
nullA lower control valve seat centre bore it is provided with in described lower control valve seat、One axial oil leak hole of lower control valve seat、One lower control valve seat axial cone seal hole、One lower control valve seat fuel feed hole、One lower control valve seat oil-feed side opening、Two lower control valve seats axially position hole、Three axially mounted screws of lower control valve seat，Described lower control valve seat axial cone seal hole and described lower control valve seat centre bore are co-axially located at the center of described lower control valve seat and described lower control valve seat axial cone seal hole is positioned at the top of described lower control valve seat centre bore，The internal diameter in described lower control valve seat axial cone seal hole is up big and down small，The small end inner diameter in lower control valve seat axial cone seal hole is equal to the internal diameter of described lower control valve seat centre bore，The tapering in described lower control valve seat axial cone seal hole is more than the tapering of the conical surface under the upper circular cone shell of column in described control spool；Some lower control valve seats radially oil-recovery tank it is configured with in the bottom surface of described lower control valve seat, at the bottom of the inner of some lower control valve seats radially oil-recovery tank and the hole of described lower control valve seat centre bore through, the outer end of some lower control valve seats radial direction oil-recovery tank is through with the outer peripheral face of described lower control valve seat；The described axial oil leak hole of lower control valve seat, two lower control valve seats axially position hole by through to end face and the bottom surface of described lower control valve seat, at the bottom of the hole of described lower control valve seat fuel feed hole concordant with the bottom surface of described lower control valve seat, one end of described lower control valve seat oil-feed side opening connects with the hole wall of described lower control valve seat fuel feed hole, and the other end of lower control valve seat oil-feed side opening connects with the hole wall of described lower control valve seat centre bore；
The maximum outside diameter of described control valve spring seat installs the internal diameter of lower opening less than described electromagnetic valve components, described control valve spring pad is provided with centre bore, and the external diameter of described clamp is more than the armature rod aperture internal diameter of described armature but is less than the internal diameter of described electric magnet spring mounting hole；The maximum outside diameter of described clamp cover is again smaller than the internal diameter of described electric magnet spring mounting hole；Described valve seat, adjustment pad, upper control valve seat, the maximum outside diameter of lower control valve seat install the internal diameter of interstitial hole less than described second electromagnetic valve components；
It is as follows that turning between described electromagnetic valve components and oil injector body joins process:
The first step, described control valve spring pad, control valve spring, control valve spring seat are fitted into described electromagnetic valve components the most successively and install in lower opening, the bottom surface of wherein said control valve spring pad contacts at the bottom of installing the hole of lower opening with described electromagnetic valve components, and the oil duct middle with first in described oil injector body of the through hole on control valve spring pad is suitable for reading to align；The bottom of described control valve spring contacts with the end face of described control valve spring pad, the top of control valve spring is connected with the lower end of described control valve spring seat, after control valve spring pad, control valve spring, control valve spring seat assemble, owing to the maximum outside diameter of described control valve spring seat is less than the internal diameter of described electromagnetic valve components installation lower opening, therefore between the maximum outside diameter and the internal diameter of described electromagnetic valve components installation lower opening of described control valve spring seat, form the first gap；
nullSecond step，The lower end of two control valve seat alignment pins is inserted into the second electromagnetic valve components install in hole, the upper location of two at the bottom of interstitial hole hole，Lower control valve seat is then placed in the second electromagnetic valve components installs interstitial hole and makes two control valve seat alignment pins axially position hole through two lower control valve seats in described lower control valve seat described lower control valve seat is positioned，The lower control valve seat fuel feed hole making the bottom surface of described lower control valve seat be in sealing contact and make at the bottom of installing the hole of interstitial hole with the second electromagnetic valve components in lower control valve seat aligns with the outlet of the first oil input channel in described oil injector body，The outlet of the entrance oil duct middle with second in described oil injector body of the axial oil leak hole of lower control valve seat in lower control valve seat is alignd，Owing to the maximum outside diameter of lower control valve seat is less than described second electromagnetic valve components, the internal diameter of interstitial hole is installed，Therefore between the maximum outside diameter and the internal diameter of described second electromagnetic valve components installation interstitial hole of described lower control valve seat, the second gap is formed，This second gap connects with the lower control valve seat radially oil-recovery tank of described lower control valve seat bottom surface；
3rd step, lower control valve seat axial cone seal hole that first shell of column of described control spool is passed down through in described lower control valve seat and be inserted in the lower control valve seat centre bore in described lower control valve seat, form couple between the outer peripheral face of the first shell of column of described control spool with the hole side face of the lower control valve seat centre bore in described lower control valve seat and coordinate；The bottom surface of the first shell of column controlling spool contacts with the end face of described control valve spring seat；The top of the conical seal (contact) face in the lower control valve seat axial cone seal hole that the part conical surface in upper circular cone shell of column on the second shell of column of described control spool is in described lower control valve seat, making to form a M type high-voltage oil cavity between the face, hole in the lower control valve seat axial cone seal hole in the part conical surface of the upper circular cone shell of column on the second shell of column of described control spool, the conical surface of lower circular cone shell of column controlled on the second shell of column of spool and described lower control valve seat, described M type high-voltage oil cavity connects with the lower control valve seat oil-feed side opening in described lower control valve seat；
null4th step，Upper control valve seat is placed in the second electromagnetic valve components installs interstitial hole and makes two control valve seat alignment pins axially position hole through the upper control valve seat of two in described upper control valve seat described upper control valve seat is positioned，Make the 4th shell of column of described control spool through the upper control valve seat centre bore in described upper control valve seat simultaneously，Behind upper control valve seat location，One of them on upper control valve seat bottom surface lower control valve seat radially oil-recovery tank pushes up with the hole of the axial oil leak hole of lower control valve seat in described lower control valve seat and connects，Owing to the maximum outside diameter of described upper control valve seat is less than described second electromagnetic valve components, the internal diameter of interstitial hole is installed，Third space is formed between maximum outside diameter and the internal diameter of described second electromagnetic valve components installation interstitial hole of the most described upper control valve seat，The lower control valve seat of described lower control valve seat bottom surface radially oil-recovery tank connects with described third space；After additionally going up control valve seat location, the upper axially mounted through hole of control valve seat of in upper control valve seat three aligns respectively with three axially mounted screws of lower control valve seat in lower control valve seat, then three screws are from top to bottom each passed through in three axially mounted screws of lower control valve seat that the axially mounted through hole of control valve seat on three in upper control valve seat is screwed in lower control valve seat, make upper and lower control valve seat link together；
4th step, adjustment pad is put into described second electromagnetic valve components and installs in interstitial hole, and make the upper end of two control valve seat alignment pins axially position hole through two the adjusting pad sheets adjusted on pad to position adjusting pad, after described adjustment pad is put into position and is positioned, the bottom surface adjusting pad contacts with the end face of described upper control valve seat, and make to push up with the hole of the axial oil leak hole of upper control valve seat in described upper control valve seat at the bottom of the hole adjusting axially oil leak hole under pad in adjustment pad to connect, the top simultaneously making the 4th shell of column of described control spool extend in the adjustment pad centre bore of described adjustment pad；Owing to the maximum outside diameter of described adjustment pad is less than the internal diameter of described second electromagnetic valve components installation interstitial hole, therefore between the maximum outside diameter and the internal diameter of described second electromagnetic valve components installation interstitial hole of described adjustment pad, form the 4th gap；
5th step, first bar segment of described armature lever, the second bar segment, the 3rd bar segment are from top to bottom sequentially passed through the valve base center hole in described valve seat, armature lever is become with valve seat combination an assembly, 3rd bar segment of wherein said armature lever coordinates with the valve base center hole couple in described valve seat, and the second bar segment of armature lever exports corresponding with the valve seat draining side opening in valve seat；Assembly is put into described second electromagnetic valve components again and installs in interstitial hole, and make the upper end of two control valve seat alignment pins axially position hole through two valve seats in valve seat valve seat is positioned, after described assembly is placed to position and is positioned, the bottom surface of valve seat contacts with the end face of described adjustment pad, and make to connect to top, oil leak hole hole with the adjustment pad upper shaft in described adjustment pad at the bottom of the hole of the axial oil leak hole of valve seat inner seat, make to connect with radial direction drain pan on three adjustment pads on described adjustment pad end face respectively at the bottom of the hole of three axial spill ports of valve seat in valve seat simultaneously；First bar segment of described armature lever is inserted into and adjusts adjusting in pad centre bore and making the bottom surface of the first bar segment of armature lever contact with the end face of described control spool the 4th shell of column of pad；Owing to the maximum outside diameter of described valve seat is less than the internal diameter of described second electromagnetic valve components installation interstitial hole, therefore between the maximum outside diameter and the internal diameter of described second electromagnetic valve components installation interstitial hole of described valve seat, form the 5th gap；
6th step, after treating that described valve seat assembles, locking swivel nut was overlapped armature lever again and makes first electromagnetic valve components screwed in described oil injector body of outer peripheral face install in the first female thread in interstitial hole, after locking swivel nut is screwed into position, the second electromagnetic valve components that described valve seat, adjustment pad, upper control valve seat, lower control valve seat are pressed in described oil injector body is installed in interstitial hole by the annular boss of locking swivel nut bottom surface, and makes each self-forming at the bottom of the bottom surface of described lower control valve seat and the hole of the second electromagnetic valve components installation interstitial hole seal；The now locking described in the Kong Dingyu of three axial spill ports of valve seat in valve seat via bottoms connection within swivel nut；
6th step, is placed on described electric magnet pad in described electromagnetic valve components installs hole and makes the bottom surface of described electric magnet pad to install with described electromagnetic valve components at the bottom of the hole in hole and contact；Then the upper end of described armature buffer spring is enclosed within the lower cylindrical part of described armature outline one assembly of formation, then the armature lever borehole jack of armature and is made to be formed between armature rod aperture and the 5th bar segment of armature lever tight fit in the 5th bar segment of described armature lever, the assembly that armature and armature buffer spring are formed is installed after putting in place, the bottom of described armature buffer spring is inserted in the through hole within described locking swivel nut and makes the bottom of armature buffer spring contact with the end face of described valve seat, the top of armature buffer spring contacts with the bottom surface, upper flange portion of armature；
7th step, described clamp is stuck in the 6th bar segment of described armature lever, then by described clamp cover, Open Side Down is enclosed within the 7th bar segment of described armature lever, 7th bar segment and the described clamp of armature lever are wrapped, now the bottom surface of clamp contacts with the end face in the upper flange portion of armature, and the end face of clamp contacts with the bottom surface of the 7th bar segment of armature lever；
8th step, electric magnet O RunddichtringO is snapped in the basifacial closure gasket groove in described electromagnet housing periphery, then electric magnet spring washer is put in the electric magnet spring mounting hole within described electric magnet and made the end face of electric magnet spring washer and the hole top contact of electric magnet spring mounting hole；Then electric magnet spring is put in electric magnet spring mounting hole and is made the top of electric magnet spring contact with the bottom surface of described electric magnet spring washer；
null9th step，By electric magnet、Electromagnetic valve housing、Electric magnet spring washer、Electric magnet spring、The assembly of electric magnet O RunddichtringO composition turns the electromagnetic valve components being buckled in oil injector body upper end around and installs in hole，And the electromagnetic valve components making the lower end of described electromagnet housing be inserted in described oil injector body upper end installs in hole，During installation，Electric magnet spring must be made coaxial with armature lever，The 8th bar segment making armature lever is inserted in the lower end of electric magnet spring，The upper surface of the 7th bar segment simultaneously making armature lever contacts with the bottom surface of described electric magnet spring，The hole end face of armature installing hole contacts with the upper flange portion end face of described armature，The bottom surface of electromagnet housing and the end face pre-contact of electric magnet pad，After the above step is finished，And the flange of described electromagnetism very tight cap upper end is made to be pressed on the step surface that described electromagnet housing is peripheral on described electromagnet housing very tight for described electromagnetism cap sleeve，Again by the second internal thread rotation of very tight for described electromagnetism cap lower end in the upper external thread of described oil injector body upper end，Pretightning force on request screws the very tight cap of electromagnetism and can be arranged on described oil injector body by described electromagnet housing；The end face of the most described electric magnet pad contacts with the bottom surface of described electromagnet housing, described electric magnet O RunddichtringO is installed in described electromagnet housing lower end periphery face and described electromagnetic valve components to be formed between the inner hole surface in hole and is sealed, described armature is positioned at described armature installing hole, and the 7th bar segment of described armature lever, the 8th bar segment, clamp, clamp cover, electric magnet spring washer are positioned in the electric magnet spring mounting hole within described electric magnet；
Atomizer parts include pressure spring pad, pressure spring, needle-valve, needle-valve body, nozzle cap nut, push rod, transition block；
Described pressure spring pad is provided with through hole；The unlatching pressure of described atomizer parts can be regulated by the thickness of regulation pressure spring pad；
It is provided with central ejector rod in described transition block and takes up hole, tapered centre hole, center needle-valve jack and transition oil duct, described central ejector rod takes up hole, tapered centre hole, center needle-valve jack are co-axially located at the center of described transition block, wherein central ejector rod takes up hole and is positioned at the top in tapered centre hole, and tapered centre hole is positioned at the top of center needle-valve jack；The end face and bottom surface of transition block are configured with hole, some upper and lower transition location；Described central ejector rod takes up the internal diameter maximum outside diameter more than described push rod in hole；
The outline of described needle-valve body is from top to bottom made up of upper cylindrical section, middle circle shell of column and lower cylindrical section, upper cylindrical section top side configuration at needle-valve body has needle-valve body to position hole, in needle-valve body, there is hole, needle-valve location at center by lower and lower arranged coaxial, is contained oil pocket, nozzle opening, needle-valve taper hole and atomizer, in needle-valve body, additionally it is additionally provided with oil-feed inclined hole, the outlet of oil-feed inclined hole connects with described Sheng oil pocket, and the entrance of oil-feed inclined hole connects with the upper cylindrical section end face of described needle-valve body；
Described needle-valve is from top to bottom bored bar portion by the first Needle shaft portion, the second Needle shaft portion, the 3rd Needle shaft portion and needle-valve and is constituted, the external diameter in the first Needle shaft portion is less than the external diameter in described second Needle shaft portion, the external diameter in the 3rd Needle shaft portion is less than the external diameter in the second Needle shaft portion, and needle-valve cone bar portion is up big and down small；
Oil injector body connecting hole, the first needle-valve body installing hole, the second needle-valve body installing hole the most coaxially it is disposed with in described nozzle cap nut, the internal diameter of described oil injector body connecting hole is more than the internal diameter of the first needle-valve body installing hole, and the internal diameter of the first needle-valve body installing hole is more than the internal diameter of the second needle-valve body installing hole；It is configured with one section of female thread in the upper end of described oil injector body connecting hole；
Described push rod is made up of the first push rod section and the second push rod section, and the first push rod section is positioned at the top of the second push rod section and the diameter diameter less than the second push rod section；The diameter of described second push rod section takes up the internal diameter in hole less than described central ejector rod；
During assembling, first pressure spring pad and pressure spring are placed in the atomizer member mounting holes of oil injector body bottom, the end face of pressure spring pad contacts with the hole end face of atomizer member mounting holes, the upper end of pressure spring contacts with the bottom surface of described pressure spring pad, then by push rod first push rod section press-in pressure spring lower end in and make the end face of the second push rod section contact with the bottom face of pressure spring；
Then the upper end of some transition block alignment pins is inserted in the hole, lower location on described oil injector body bottom surface, in then transition block is arranged on the bottom surface of described oil injector body and makes the hole, upper transition location that some transition block alignment pin lower ends are inserted on transition block end face, transition block is positioned, the end opening making suitable for reading middle with second in the oil injector body oil duct of the transition oil duct of transition block aligns, and makes the central ejector rod in transition block take up borehole jack in the second push rod section of push rod；In the hole, lower transition the location again upper end of some needle-valve body alignment pins being inserted on transition block bottom surface；
Then needle-valve is inserted into the hole, needle-valve location of needle-valve body, contains in oil pocket, nozzle opening, needle-valve taper hole, the end face of needle-valve body is exposed in the first Needle shaft portion on needle-valve, it is secondary that second Needle shaft portion and hole, needle-valve location constitute closely spaced couple, 3rd Needle shaft portion and nozzle opening matched in clearance, the conical seal (contact) face in needle-valve cone bar portion coordinates with the cone seal face seal of needle-valve taper hole；
Needle-valve body is positioned in being arranged on the bottom surface of transition block and make the hole, needle-valve body location that some needle-valve body alignment pin lower ends are inserted on needle-valve body end face by the end face of the needle-valve body that then will be equipped with needle-valve, the center needle-valve jack that the first Needle shaft portion making needle-valve is inserted into transition block is interior and concentric, makes the entrance of the oil-feed inclined hole in needle-valve body align with the transition oil duct end opening in described transition block；
Nozzle cap nut is finally from bottom to top enclosed within needle-valve body and make the female thread of oil injector body connecting hole upper end of this nozzle cap nut spin with the lower external thread of oil injector body bottom, after nozzle cap nut is screwed into position, the first needle-valve body installing hole in nozzle cap nut coordinates with the upper cylindrical section of needle-valve body, at the bottom of the hole of the first needle-valve body installing hole in nozzle cap nut, the bottom surface with the upper cylindrical section of needle-valve body contacts, the second needle-valve body installing hole in nozzle cap nut coordinates with the middle circle shell of column of needle-valve body, by transition block, needle-valve body is closely fitted on the bottom surface of oil injector body.
CN201511023051.7A 2015-12-30 2015-12-30 A kind of common-rail injector Active CN105822475B (en)

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CN106523223A (en) * 2017-01-18 2017-03-22 哈尔滨工程大学 Micro-dynamic oil return resonance bypass type electronic control oil injector
CN106545448A (en) * 2017-01-18 2017-03-29 哈尔滨工程大学 Two-way oil-feed resonance bypass type electric-controlled fuel injector
CN106545444A (en) * 2017-01-18 2017-03-29 哈尔滨工程大学 A kind of two-way oil-feed bypass type electric-controlled fuel injector with ditch
CN106609719A (en) * 2016-12-31 2017-05-03 南岳电控（衡阳）工业技术股份有限公司 Fuel injector for high-pressure common rail fuel injection system
CN109139319A (en) * 2018-09-27 2019-01-04 中国重汽集团重庆燃油喷射系统有限公司 A kind of common-rail injector
CN109372669A (en) * 2018-12-31 2019-02-22 南岳电控（衡阳）工业技术股份有限公司 A kind of high pressure common rail injector

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CN104018968A (en) * 2013-03-01 2014-09-03 罗伯特·博世有限公司 High-pressure oil supply pump and diesel engine with same

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US20120280164A1 (en) * 2010-10-22 2012-11-08 Beijing Aerospace Propulsion Institute Disc valve with diversion hole
CN104018968A (en) * 2013-03-01 2014-09-03 罗伯特·博世有限公司 High-pressure oil supply pump and diesel engine with same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106609719A (en) * 2016-12-31 2017-05-03 南岳电控（衡阳）工业技术股份有限公司 Fuel injector for high-pressure common rail fuel injection system
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
CN106523223A (en) * 2017-01-18 2017-03-22 哈尔滨工程大学 Micro-dynamic oil return resonance bypass type electronic control oil injector
CN106545448A (en) * 2017-01-18 2017-03-29 哈尔滨工程大学 Two-way oil-feed resonance bypass type electric-controlled fuel injector
CN106545444A (en) * 2017-01-18 2017-03-29 哈尔滨工程大学 A kind of two-way oil-feed bypass type electric-controlled fuel injector with ditch
CN106545448B (en) * 2017-01-18 2022-07-15 哈尔滨工程大学 Double-path oil inlet resonance bypass type electric control oil injector
CN109139319A (en) * 2018-09-27 2019-01-04 中国重汽集团重庆燃油喷射系统有限公司 A kind of common-rail injector
CN109139319B (en) * 2018-09-27 2023-09-29 重油高科电控燃油喷射系统(重庆)有限公司 Common rail fuel injector
CN109372669A (en) * 2018-12-31 2019-02-22 南岳电控（衡阳）工业技术股份有限公司 A kind of high pressure common rail injector
CN109372669B (en) * 2018-12-31 2024-03-22 南岳电控（衡阳）工业技术股份有限公司 High-pressure common rail oil sprayer

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