CN108798957A - Pressurized electrically controlled fuel injector in bivalve - Google Patents
Pressurized electrically controlled fuel injector in bivalve Download PDFInfo
- Publication number
- CN108798957A CN108798957A CN201810699561.3A CN201810699561A CN108798957A CN 108798957 A CN108798957 A CN 108798957A CN 201810699561 A CN201810699561 A CN 201810699561A CN 108798957 A CN108798957 A CN 108798957A
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- China
- Prior art keywords
- oil
- oil inlet
- piston
- inlet passage
- pressure release
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/025—Hydraulically actuated valves draining the chamber to release the closing pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
- F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
- F02M57/027—Injectors structurally combined with fuel-injection pumps characterised by the pump drive electric
Abstract
The invention discloses pressurized electrically controlled fuel injector in a kind of bivalve, it is equipped with the first oil inlet passage and the second oil inlet passage in fuel injection housing body, the first oil inlet passage is connected to oil storage cavity, and the second oil inlet passage is connected to counter balance pocket；Control chamber is equipped in fuel injection housing body, charged piston, pressure release piston and driving mechanism are equipped in control chamber, pressure release piston face is equipped with pressure release oil duct, pressurization oil pocket is equipped in fuel injection housing body, oil pocket top is connected to upper oil duct, lower part is connected to lower oil duct for pressurization, to pressurization oil pocket pressurization while charged piston under the action of the drive mechanism closes upper oil duct.The present invention pushes pressure release piston motion by driving mechanism, it is connected to high-low pressure oil circuit by pressure release oil duct, it solves existing fuel injector and the sealing problem that high-low pressure oil communication is brought is controlled by ball valve, on the other hand the present invention pushes charged piston to realize the secondary pressurized of fuel oil using driving mechanism, realizes that fuel oil preferably sprays pressure and high-precision oil spout.
Description
Technical field
The present invention relates to pressurized electrically controlled fuel injectors in a kind of bivalve.
Background technology
The general electromagnet of existing electric-controlled fuel injector, armature, ball valve, release control hole, oil-filled control hole, Needle shaft, spray
Mouth needle-valve pressure rings and spray orifice composition.Its principle is：After electromagnet is powered, electromagnetic force, adhesive armature are generated, while ball valve is beaten
It opens, high pressure fuel is by the oil return of release control hole, since the fuel pressure that lower part is pressed in nozzle needle pressure rings is higher, in pressure
Under the action of difference, Needle shaft moves upwards, and needle-valve is opened, and fuel oil is sprayed through spray orifice, realizes oil spout.When electromagnet power-off, armature
It is resetted under the action of resetting spring, ball valve closes release control hole, acts on the pressure and nozzle needle pressure on Needle shaft top
The pressure of power ring is suitable, therefore Needle shaft moves downward under the action of resetting spring, closes spray orifice, end of injection.
Existing electric-controlled fuel injector realizes the injection of fuel oil using fuel Injection Control mechanism, if any using the logical of electromagnet
The actuation and release of electricity and power-off control-armature, while the open and close of needle-valve are controlled, realize oil spout.The sealing of control room
Property is acted on pressure on the conical surface by ball valve to be influenced, if poorly sealed, generates the abnormal unlatching of oil nozzle needle-valve.It is existing simultaneously
Electric-controlled fuel injector mesohigh fuel oil pressure, that is, high-pressure oil pipe intermediate fuel oil pressure, atomizing effect exported by high-pressure oil pump
The influence of fuel pressure.If diesel engine, in the slow-speed of revolution, the fuel pressure of high-pressure oil pump output is relatively low, therefore through fuel injector
Atomizing effect is deteriorated after ejection, and combustion efficiency is caused to decline.
Invention content
The technical problem to be solved in the present invention is to provide a kind of bivalves injection pressure can be improved and realize high-precision oil spout
Interior pressurized electrically controlled fuel injector.
In order to solve the above technical problems, the present invention includes nozzle holder, high compression ignition is offered on the nozzle holder
Oily oil inlet, oil return opening, the fuel injection housing body is interior to be equipped with the oil inlet passage and and oil return opening being connected to high pressure fuel oil inlet
The drainback passage of connection, the fuel injection housing body is interior to be equipped with valve rod, and valve rod lower end is equipped with needle-valve and can make answering for needle-valve reset
Position mechanism correspond to valve rod top is equipped with oil inlet passage be connected to counter balance pocket, corresponding needle-valve in the fuel injection housing body equipped with storage
Oil pocket, the oil inlet passage are connected to oil storage cavity, it is characterized in that the fuel injection housing body in be equipped with respectively with high pressure fuel oil inlet
The first oil inlet passage and the second oil inlet passage of mouth connection, first oil inlet passage are connected to oil storage cavity, second oil inlet
Channel is connected to counter balance pocket；Control chamber is equipped in the fuel injection housing body, first oil inlet passage and the second oil inlet passage exist
It is oppositely arranged at control chamber, charged piston, pressure release piston and driving charged piston, pressure release piston motion is equipped in the control chamber
Driving mechanism, the pressure release piston face, which is equipped with, can connect with the second oil inlet passage so that counter balance pocket is connected to drainback passage
Pressure release oil duct, the pressurization oil pocket that the first oil inlet passage is divided into upper oil duct and lower oil duct is equipped in the fuel injection housing body,
The pressurization oil pocket top is connected to upper oil duct, lower part is connected to lower oil duct, and the upper oil duct is arranged close to inside, lower oil duct leans on
Nearly outside setting, the charged piston under the action of the drive mechanism it is mobile while upper oil duct is closed to the oil pocket that pressurizes pressurize into
And it pressurizes to lower oil duct；The driving mechanism can make the first oil inlet passage of charged piston pair be pressurizeed, make pressure release piston simultaneously
Pressure release oil duct connect with the second oil inlet passage so that counter balance pocket to be connected to drainback passage, or make charged piston, pressure release simultaneously
Piston reset makes that the first oil inlet passage and the second oil inlet passage are respectively at oil circuit open state, drainback passage is in closed
State.
The high pressure fuel oil inlet is arranged at the top of nozzle holder, and high pressure fuel oil inlet lower end is connected with always
Oil inlet passage, total oil inlet passage lower end are connect with the first oil inlet passage and the second oil inlet passage respectively.
The nozzle holder is from top to bottom divided into epimere, stage casing and hypomere, big in each section of junction setting diameter
In the expansion hole of corresponding oil duct.
The pressure release piston includes the cylindrical piston only in its cross section, and the peripheral surface of the piston only is equipped with
The pressure release oil duct so that counter balance pocket is connected to drainback passage is connect with the second oil inlet passage when pressure release piston moves in place；Institute
The box body for stating mounting box is equipped with connection oil duct, and the upper end of the connection oil duct is connected to drainback passage, the connection oil duct
Lower end can be connected to counter balance pocket being connected to drainback passage with pressure release oil duct.
The driving mechanism includes the mounting box being made of upper cartridge body and lower box body, is used to drive in mounting box
Charged piston is mobile or the first actuator for resetting and for driving the second actuator that pressure release piston is mobile or resets, and described the
One actuator and the second actuator synchronous working.
First actuator is the first piezo-electric crystal being fixed in mounting box, and second actuator is to be fixed on peace
The second piezo-electric crystal in mounted box；The inner end of first piezo-electric crystal is packed in mounting box, first piezo-electric crystal
Outer end and the inner end of charged piston are affixed；The inner end of second piezo-electric crystal is packed in mounting box, second piezo crystals
The outer end of body and the inner end of pressure release piston are affixed；It is correspondingly provided on the mounting box and nozzle holder for by the first piezo crystals
The power supply connecting hole that body and the second piezo-electric crystal are connect with power supply.
The upper cartridge body and lower box body are structure as a whole, and the opposite sides portion of the mounting box is opened up for installing the first pressure
The opening of the second piezo-electric crystal of transistor, the opening of charged piston and installation, pressure release piston.
The middle part of the mounting box is equipped with the partition board that its inner cavity is divided into pressure-releasing chamber and pressurizing chamber, is set in the pressure-releasing chamber
Have the first armature, can attract the first armature movement to make charged piston movement to pressurization oil pocket pressurization the first solenoid valve, can
The first armature is set to reset the (the first back-moving spring for driving charged piston to reset, the first armature, the first solenoid valve, first reset
Spring and control-rod form the first actuator；It is equipped with the second armature in the pressurizing chamber, the movement of the second armature can be attracted to make
The second electromagnetism that the movement of pressure release piston makes pressure release oil duct be connect with the second oil inlet passage to which counter balance pocket to be connected to drainback passage
Valve can make the second armature reset to drive the second back-moving spring of pressure release piston reset, the second armature, second solenoid valve, the
Two resetting springs and control-rod form the second actuator；The side of the mounting box offer respectively for accommodate charged piston and
The opening of pressure release piston.
The partition board is structure as a whole with lower box body, the top of the partition board be bonded with the bottom surface of upper cartridge body corresponding position from
And pressure-releasing chamber and pressurization are separated.
The lower box body bottom surface is equipped with locating piece, and the location hole is caught in corresponding opening in fuel injection housing body and realizes installation
The positioning of box.
With the above structure, the present invention pushes pressure release piston motion by driving mechanism, is connected to by pressure release oil duct
High-low pressure oil circuit solves existing fuel injector and controls the sealing problem that high-low pressure oil communication is brought by ball valve, on the other hand
Fuel pressure higher than oil pump output is influenced by diesel engine speed, and the present invention pushes supercharging using solenoid valve or piezo-electric crystal
Piston realizes the secondary pressurized of fuel oil, realizes that fuel oil preferably sprays pressure and high-precision oil spout, avoids diesel engine at low turn
The undesirable influence of the low fogging effect of injection pressure brought when speed operating.
Description of the drawings
Below in conjunction with the accompanying drawings and specific implementation mode invention is further described in detail：
Fig. 1 is the structural schematic diagram of the first embodiment of the invention；
Fig. 2 is the structural schematic diagram amplified at A in Fig. 1；
Fig. 3 is the structural schematic diagram of second of embodiment of the invention；
Fig. 4 is the structural schematic diagram amplified at B in Fig. 3；
Fig. 5 is the structural schematic diagram of pressure release piston.
Specific implementation mode
On the basis of Fig. 1, the left side in Fig. 1 is a left side for left and right as described below, and the right side in Fig. 1 is the right side.As shown, spray
Oily device includes nozzle holder, offers high pressure fuel oil inlet, oil return opening on nozzle holder, be equipped in fuel injection housing body with
The oil inlet passage of high pressure fuel oil inlet connection and the drainback passage 1 being connected to oil return opening, fuel injection housing body is interior to be equipped with valve rod 6,
6 lower end of valve rod is equipped with needle-valve 4 and can make the resetting-mechanism 5 of the reset of needle-valve 4, and corresponding to 6 top of valve rod in fuel injection housing body is equipped with
It is equipped with oil storage cavity 3 with the counter balance pocket 2 of oil inlet passage connection, corresponding needle-valve 4.
It is equipped with the first oil inlet passage 18 being connected to respectively with high pressure fuel oil inlet in fuel injection housing body and the second oil inlet is logical
Road, for ease of the driving mechanism controlled to the first oil inlet passage 18 and the second oil inlet passage and piston is arranged simultaneously in the present invention
Convenient for the break-make of more precise control the first oil inlet passage 18 and the second oil inlet passage, high pressure fuel oil inlet is arranged in oil spout
Device case top, oil return opening are arranged in the side of nozzle holder, and high pressure fuel oil inlet lower end is connected with total oil inlet passage 8,
Total 8 lower end of oil inlet passage is connect with the first oil inlet passage 18 and the second oil inlet passage respectively.
First oil inlet passage 18 is connected to the oil storage cavity 3 of lower part, and the lower end of the second oil inlet passage is connected to counter balance pocket 2；Spray
Control chamber is equipped in fuel shell, the first oil inlet passage 18 and the second oil inlet passage are oppositely arranged at control chamber, in control chamber
Equipped with the driving mechanism that charged piston 12, pressure release piston 7 and driving charged piston 12, pressure release piston 7 move, 7 table of pressure release piston
Face is equipped with the pressure release oil duct 9 that can connect to be connected to counter balance pocket 2 with drainback passage 1 with the second oil inlet passage, nozzle holder
First oil inlet passage 18 is divided into the pressurization oil pocket 13 of upper oil duct 19 and lower oil duct 20 by interior be equipped with, pressurization 13 top of oil pocket with it is upper
The connection of oil duct 19, lower part are connected to lower oil duct 20, and upper oil duct 19 is arranged close to inside, lower oil duct 20 is arranged close to outside, supercharging
Piston 12 pressurizes and then to lower oil duct 20 to pressurization oil pocket 13 while upper oil duct 19 is closed in movement under the action of the drive mechanism
Pressurization；Driving mechanism can make charged piston 12 be pressurizeed, be made to the first oil inlet passage 18 the pressure release oil duct of pressure release piston 7 simultaneously
9 connect counter balance pocket 2 being connected to drainback passage 1 with the second oil inlet passage, or make charged piston 12, pressure release piston 7 simultaneously
Reset makes that the first oil inlet passage 18 and the second oil inlet passage are respectively at oil circuit open state, drainback passage 1 is in closed state.
Driving mechanism includes the mounting box being made of upper cartridge body 14 and lower box body 11, is used to drive in mounting box
The movement of charged piston 12 or the first actuator resetted and the second actuator for driving pressure release piston 7 to move or reset, the
One actuator and the second actuator synchronous working.The outer end of first actuator is fixedly mounted with charged piston 12, the outer end of the second actuator
It is fixedly mounted with pressure release piston 7.
As shown in figure 5, pressure release piston 7 includes the cylindrical piston only in its cross section, on the peripheral surface of piston only
Equipped with the pressure release for connecting counter balance pocket 2 being connected to drainback passage 1 with the second oil inlet passage when pressure release piston 7 moves in place
Oil duct 9；The box body of mounting box is equipped with connection oil duct 22, and the upper end of connection oil duct 22 is connected to drainback passage 1, is connected to oil duct 22
Lower end can be connected to pressure release oil duct 9 so that counter balance pocket 2 to be connected to drainback passage 1.Drainback passage 1, pressure release oil duct 9 in diagram
Understanding is simply facilitated with the location mark for being connected to oil duct 22, in specific setting, with the first oil inlet passage 18 not same flat
On face.
As depicted in figs. 1 and 2, the middle part of mounting box is equipped with the partition board 25 that its inner cavity is divided into pressure-releasing chamber and pressurizing chamber,
Pressure-releasing chamber is interior to be equipped with the first armature 26, can attract the movement of the first armature 26 to make the movement of charged piston 12 add pressurization oil pocket 13
First solenoid valve 27 of pressure can make the first armature 26 reset the (the first back-moving spring 28 for driving charged piston 12 to reset, the
One armature 26 is arranged in the inside of the first solenoid valve 27 i.e. left side, and the outside of the first armature 26 is that right side is fixed with non-magnetic control
Bar 29 processed, control-rod 29 pass through the first solenoid valve 27 and can horizontally slip with respect to the first solenoid valve 27, and control-rod 29 is to the left
It is set with (the first back-moving spring 28, to ensure the stability of (the first back-moving spring 28, the first solenoid valve 27, which is correspondingly arranged, can accommodate the
The deep gouge of one 28 right sections of resetting spring, the right end and charged piston 12 of control-rod 29 are affixed, the first armature 26, the first solenoid valve
27, (the first back-moving spring 28 and control-rod 29 form the first actuator；It is equipped with the second armature 30 in pressurizing chamber, the second rank can be attracted
The movement of iron 30 is to make the movement of pressure release piston 7 that pressure release oil duct 9 be made to connect to lead to counter balance pocket 2 with oil return with the second oil inlet passage
The second solenoid valve 31 of the connection of road 1 can make the second armature 30 reset the second back-moving spring for driving pressure release piston 7 to reset
32；Second armature 30 is arranged on the inside of second solenoid valve 31 i.e. right side, and the outside of the second armature 30 is that left side is fixed with no magnetic
Property control-rod 29, control-rod 29 passes through and second solenoid valve 31 and can horizontally slip with respect to second solenoid valve 31, and control-rod 29 exists
Its right side is set with second back-moving spring 32, and to ensure the stability of second back-moving spring 32, second solenoid valve 31 is correspondingly arranged can
The deep gouge of 32 right sections of second back-moving spring is accommodated, the right end and pressure release piston 7 of control-rod 29 are affixed, second the 30, second electricity of armature
Magnet valve 31, second back-moving spring 32 and control-rod 29 form the second actuator；The side of mounting box is offered respectively for accommodating
The opening of charged piston 12 and pressure release piston 7, when solenoid valve powers off, charged piston 12 and pressure release piston 7 are retracted in opening.Every
Plate 25 is arranged in the center of mounting box, and partition board 25 is structure as a whole with lower box body 11, and the top of partition board 25 is corresponding with upper cartridge body 14
To effectively separate pressure-releasing chamber and pressurization, the setting of partition board can also prevent rank of the solenoid valve to the other side for the bottom surface fitting of position
Iron has an impact, and influences the precision of oil-control.11 bottom surface of lower box body is equipped with locating piece, and location hole is caught in corresponding in fuel injection housing body
Opening realizes the positioning of mounting box.
As shown in Figure 3 and Figure 4, the first actuator is the first piezo-electric crystal 23 being fixed in mounting box, the second actuator
To be fixed on the second piezo-electric crystal 24 in mounting box；The inner end of first piezo-electric crystal 23 is packed in mounting box, the first piezoelectricity
The outer end of crystal 23 and the inner end of charged piston 12 are affixed；The inner end of second piezo-electric crystal 24 is packed in mounting box, the second pressure
The outer end of transistor 24 and the inner end of pressure release piston 7 are affixed；It is correspondingly provided on mounting box and nozzle holder for being pressed first
The power supply connecting hole that transistor 23 and the second piezo-electric crystal 24 are connect with power supply.Upper cartridge body 14 and lower box body 11 are structure as a whole,
The opposite sides portion of mounting box opens up the second piezo crystals of opening and installation for installing the first piezo-electric crystal 23, charged piston 12
The opening of body 24, pressure release piston 7.It extends that supercharging is pushed to live due to the inverse piezoelectric effect of piezo-electric crystal itself, when being powered
Plug 12, pressure release piston 7 are displaced outwardly, and bounce back that charged piston 12, pressure release piston 7 is driven to withdraw when powering off.
The first actuator and the second actuator are symmetrical set in the present invention, first, the body of driving mechanism can be reduced
Product, and then reduce the volume of fuel injector, second is that the first oil inlet passage 18 and the second oil inlet passage can be controlled accurately, improve spray
The precision of oil, third, structure of the invention can be made simpler, easy to process, maintenance.
For ease of the assembling of the present invention, nozzle holder is from top to bottom divided into epimere, stage casing and hypomere, stage casing top
Deep gouge is set and forms control chamber, the location hole of lower box body 11 is caught in the top of counter balance pocket 2 and realizes the positioning of mounting box when assembling, so
Mounting box is encapsulated in fuel injection housing body by installation epimere afterwards, hypomere and stage casing be correspondingly arranged 6 installation space of valve rod and
Lower section upper portion setting is easily installed the 6 resetting spring installation space of valve rod for being resetted to valve rod 6.Epimere, stage casing and under
Section is connected by fastening nut 33 respectively.The present invention also can be selected in the prior art other be easily installed mounting box and valve rod
6 structure, in this not go into detail.Since nozzle holder is assembled for three sections by upper, middle and lower, to ensure that each oil duct can essence
Really connection is more than the expansion hole 21 of corresponding oil duct in each section of junction setting diameter, and expansion hole 21 is coaxially disposed with corresponding oil duct,
By the way that expansion hole 21 is arranged, it can prevent mismachining tolerance from causing each section of oil duct that cannot effectively dock, the flowing of oil be influenced, to drop
The difficulty of processing of the low present invention reduces processing cost.
The course of work of the present invention is as follows：High pressure fuel enters fuel injector by high pressure fuel oil inlet, wherein passing through all the way
First oil inlet passage 18, pressurization oil pocket 13 enter oil storage cavity 3, and another way enters counter balance pocket 2 through the second oil inlet passage, balances at this time
The oil pressure balance of chamber 2 and oil storage cavity 3, needle-valve 4 are closed under the action of 4 resetting-mechanism 5 of needle-valve.When solenoid valve or pressure
When transistor is powered, actuation the second armature 30 promotion pressure release of second solenoid valve 31 piston 7 is moved to the left or the second piezo-electric crystal 24
Elongation pushes pressure release piston 7 to be moved to the left, by the lower half portion of the first oil inlet passage 18 while closing the first oil inlet passage 18
It is connected to drainback passage 1 by drain path, the fuel oil in counter balance pocket 2 flows into drainback passage 1 through drain path, in counter balance pocket 2
Oil pressure reduce；At the same time, the first solenoid valve 27 is attracted the corresponding promotion of first armature 26 charged piston 12 and moves right, or
The elongation of first piezo-electric crystal 23 pushes charged piston 12 to move right, first by 19 envelope of upper oil duct when charged piston 12 moves right
It closes, continues the high pressure fuel that can be squeezed in pressurization oil pocket 13 and lower oil duct 20 that moves right, secondary pressurized is carried out to fuel oil, stores oil
For high pressure fuel in chamber 3 after secondary pressurized, oil pressure is big compared with the fuel pressure in counter balance pocket 2, under the action of pressure difference, valve
Bar 6 moves upwards, and needle-valve 4 is opened, and realizes oil spout.When solenoid valve or piezo-electric crystal power off, the second armature 30 is resetted second
Pulling pressure release piston 7 moves right under the action of spring 32 or the second piezo-electric crystal 24 retraction pulls pressure release piston 7 to move right
Dynamic, the first about 18 oil inlet passage connection, high pressure fuel reenters in counter balance pocket 2,；At the same time, the first armature 26 is
Pulling charged piston 12 is moved to the left under the action of one resetting spring 28 or the first piezo-electric crystal 23 retraction pulls charged piston 12
It is moved to the left, upper oil duct 19, lower oil duct 20 are connected to the movement of charged piston 12 by the oil pocket 13 that pressurizes afterwards in place, secondary pressurized knot
The pressure of beam, counter balance pocket 2 and oil storage cavity 3 reaches balance again, and needle-valve 4 is closed under the action of 4 resetting-mechanism 5 of needle-valve, oil spout
Terminate.
The present invention pushes pressure release piston 7 to move by driving mechanism, and high-low pressure oil circuit is connected to by pressure release oil duct 9, solves
Existing fuel injector of having determined controls the sealing problem that high-low pressure oil communication is brought by ball valve, is on the other hand higher than oil pump output
Fuel pressure is influenced by diesel engine speed, and the present invention pushes charged piston 12 to realize fuel oil using solenoid valve or piezo-electric crystal
Secondary pressurized, realize fuel oil preferably spray pressure and high-precision oil spout, avoid diesel engine and brought when the slow-speed of revolution operates
The undesirable influence of the low fogging effect of injection pressure.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention.Previous embodiment is to the present invention
It is described in detail, it for those skilled in the art, still can be to the skill recorded in foregoing embodiments
Art scheme is modified or equivalent replacement of some of the technical features.In every case in the inventive concept range of the present invention
Within, any modification, equivalent substitution, improvement and etc. done are all included in the scope of protection of the present invention.
Claims (10)
1. pressurized electrically controlled fuel injector in a kind of bivalve, including nozzle holder, high pressure fuel is offered on the nozzle holder
Oil inlet, oil return opening, the fuel injection housing body is interior to be equipped with the oil inlet passage being connected to high pressure fuel oil inlet and connects with oil return opening
Logical drainback passage, the fuel injection housing body is interior to be equipped with valve rod（6）, valve rod（6）Lower end is equipped with needle-valve（4）With can make needle-valve
（4）The resetting-mechanism of reset（5）, valve rod is corresponded in the fuel injection housing body（6）Top is equipped with the balance being connected to oil inlet passage
Chamber（2）, corresponding needle-valve（4）Equipped with oil storage cavity（3）, the oil inlet passage and oil storage cavity（3）Connection, it is characterized in that the fuel injector
The first oil inlet passage being connected to respectively with high pressure fuel oil inlet is equipped in shell（18）With the second oil inlet passage, described first into
Oily channel（18）With oil storage cavity（3）Connection, second oil inlet passage and counter balance pocket（2）Connection；It is set in the fuel injection housing body
There are control chamber, first oil inlet passage（18）It is oppositely arranged at control chamber with the second oil inlet passage, is set in the control chamber
There is charged piston（12）, pressure release piston（7）With driving charged piston（12）, pressure release piston（7）The driving mechanism of movement, it is described to let out
Press piston（7）Surface, which is equipped with, can connect with the second oil inlet passage thus by counter balance pocket（2）With drainback passage（1）The pressure release oil of connection
Road（9）, the fuel injection housing body is interior to be equipped with the first oil inlet passage（18）It is divided into upper oil duct（19）With lower oil duct（20）Plus
Pumping cavity（13）, the pressurization oil pocket（13）Top and upper oil duct（19）Connection, lower part and lower oil duct（20）Connection, it is described to oil
Road（19）Close to inside setting, lower oil duct（20）It is arranged close to outside, the charged piston（12）It moves under the action of the drive mechanism
It moves upper oil duct（19）To the oil pocket that pressurizes while closing（13）Pressurization is in turn to lower oil duct（20）Pressurization；The driving mechanism can
Make charged piston simultaneously（12）To the first oil inlet passage（18）It pressurizeed, make pressure release piston（7）Pressure release oil duct（9）With second
Oil inlet passage connection is thus by counter balance pocket（2）With drainback passage（1）Connection, or make charged piston simultaneously（12）, pressure release piston（7）
Reset makes the first oil inlet passage（18）It is respectively at oil circuit open state, drainback passage with the second oil inlet passage（1）In closing
State.
2. pressurized electrically controlled fuel injector in bivalve according to claim 1, it is characterized in that the high pressure fuel oil inlet is arranged
At the top of nozzle holder, high pressure fuel oil inlet lower end is connected with total oil inlet passage（8）, total oil inlet passage（8）
Lower end respectively with the first oil inlet passage（18）It is connected with the second oil inlet passage.
3. pressurized electrically controlled fuel injector in bivalve according to claim 1, it is characterized in that the nozzle holder is from top to bottom
It is divided into epimere, stage casing and hypomere, is more than the expansion hole of corresponding oil duct in each section of junction setting diameter（21）.
4. pressurized electrically controlled fuel injector in bivalve according to claim 1, it is characterized in that the pressure release piston（7）Including its cross
The cylindrical piston only in section, the peripheral surface of the piston only, which is equipped with, works as pressure release piston（7）It is mobile in place when with the
The connection of two oil inlet passages is thus by counter balance pocket（2）With drainback passage（1）The pressure release oil duct of connection（9）；The box body of the mounting box
It is equipped with connection oil duct（22）, the connection oil duct（22）Upper end and drainback passage（1）Connection, the connection oil duct（22）'s
It lower end can be with pressure release oil duct（9）Connection is thus by counter balance pocket（2）With drainback passage（1）Connection.
5. pressurized electrically controlled fuel injector in bivalve according to any one of claim 1 to 4, it is characterized in that the driving mechanism
Including by upper cartridge body（14）And lower box body（11）The mounting box of composition is used to drive charged piston in mounting box（12）
Mobile or the first actuator for resetting and for driving pressure release piston（7）The second actuator that is mobile or resetting, described first drives
Moving part and the second actuator synchronous working.
6. pressurized electrically controlled fuel injector in bivalve according to claim 5, it is characterized in that first actuator is to be fixed on
The first piezo-electric crystal in mounting box（23）, second actuator is the second piezo-electric crystal being fixed in mounting box（24）；
First piezo-electric crystal（23）Inner end be packed in mounting box, first piezo-electric crystal（23）Outer end and charged piston
（12）Inner end it is affixed；Second piezo-electric crystal（24）Inner end be packed in mounting box, second piezo-electric crystal（24）
Outer end and pressure release piston（7）Inner end it is affixed；It is correspondingly provided on the mounting box and nozzle holder for by the first piezoelectricity
Crystal（23）With the second piezo-electric crystal（24）The power supply connecting hole being connect with power supply.
7. pressurized electrically controlled fuel injector in bivalve according to claim 6, it is characterized in that the upper cartridge body（14）And lower box body
（11）It is structure as a whole, the opposite sides portion of the mounting box is opened up for installing the first piezo-electric crystal（23）, charged piston
（12）Opening and installation the second piezo-electric crystal（24）, pressure release piston（7）Opening.
8. pressurized electrically controlled fuel injector in bivalve according to claim 5 is incited somebody to action it is characterized in that the middle part of the mounting box is equipped with
Its inner cavity is divided into the partition board of pressure-releasing chamber and pressurizing chamber（25）, the pressure-releasing chamber is interior to be equipped with the first armature（26）, first can be attracted
Armature（26）Movement is to make charged piston（12）Movement is to the oil pocket that pressurizes（13）First solenoid valve of pressurization（27）, first can be made
Armature（26）It resets to drive charged piston（12）The (the first back-moving spring of reset（28）, the first armature（26）, the first electromagnetism
Valve（27）, (the first back-moving spring（28）And control-rod（29）Form the first actuator；The second armature is equipped in the pressurizing chamber
（30）, the second armature can be attracted（30）Movement is to make pressure release piston（7）Movement makes pressure release oil duct（9）Connect with the second oil inlet passage
It connects thus by counter balance pocket（2）With drainback passage（1）The second solenoid valve of connection can make the second armature（30）It resets and is let out to drive
Press piston（7）The second back-moving spring of reset, the second armature（30）, second solenoid valve（31）, second back-moving spring（32）And control
Bar processed（29）Form the second actuator；The side of the mounting box is offered respectively for accommodating charged piston（12）It lives with pressure release
Plug（7）Opening.
9. pressurized electrically controlled fuel injector in bivalve according to claim 8, it is characterized in that the partition board（25）With lower box body
（11）It is structure as a whole, the partition board（25）Top and upper cartridge body（14）The bottom surface fitting of corresponding position to by pressure-releasing chamber and
Pressurization separates.
10. pressurized electrically controlled fuel injector in bivalve according to claim 8, it is characterized in that the lower box body（11）Bottom surface is equipped with
Locating piece, the location hole are caught in the positioning that corresponding opening in fuel injection housing body realizes mounting box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810699561.3A CN108798957A (en) | 2018-06-29 | 2018-06-29 | Pressurized electrically controlled fuel injector in bivalve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810699561.3A CN108798957A (en) | 2018-06-29 | 2018-06-29 | Pressurized electrically controlled fuel injector in bivalve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108798957A true CN108798957A (en) | 2018-11-13 |
Family
ID=64073801
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810699561.3A Pending CN108798957A (en) | 2018-06-29 | 2018-06-29 | Pressurized electrically controlled fuel injector in bivalve |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4080942A (en) * | 1976-06-23 | 1978-03-28 | The United States Of America As Represented By The Secretary Of The Army | Metering fuel by compressibility |
| JPH03175146A (en) * | 1989-12-04 | 1991-07-30 | Nippondenso Co Ltd | Fuel injection device |
| CN1174935A (en) * | 1996-07-12 | 1998-03-04 | 贵州红林机械厂 | Mixing type hydraulic electric controlled fuel injector |
| CN1676921A (en) * | 2004-03-31 | 2005-10-05 | 三菱扶桑卡客车公司 | Fuel jetting device |
| US20070246014A1 (en) * | 2006-03-13 | 2007-10-25 | Pena James A | Direct needle control fuel injectors and methods |
| CN101501323A (en) * | 2006-08-04 | 2009-08-05 | 罗伯特·博世有限公司 | Injector for a fuel injection system |
| CN104632485A (en) * | 2014-12-29 | 2015-05-20 | 沪东重机有限公司 | Common-rail fuel oil jet system controlled by double electromagnetic valves and applied to low-speed diesel engine for ship |
| CN105626316A (en) * | 2016-02-29 | 2016-06-01 | 哈尔滨工程大学 | Combined type pressurizing double-electromagnetic-valve gas injection device |
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2018
- 2018-06-29 CN CN201810699561.3A patent/CN108798957A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4080942A (en) * | 1976-06-23 | 1978-03-28 | The United States Of America As Represented By The Secretary Of The Army | Metering fuel by compressibility |
| JPH03175146A (en) * | 1989-12-04 | 1991-07-30 | Nippondenso Co Ltd | Fuel injection device |
| CN1174935A (en) * | 1996-07-12 | 1998-03-04 | 贵州红林机械厂 | Mixing type hydraulic electric controlled fuel injector |
| CN1676921A (en) * | 2004-03-31 | 2005-10-05 | 三菱扶桑卡客车公司 | Fuel jetting device |
| US20070246014A1 (en) * | 2006-03-13 | 2007-10-25 | Pena James A | Direct needle control fuel injectors and methods |
| CN101501323A (en) * | 2006-08-04 | 2009-08-05 | 罗伯特·博世有限公司 | Injector for a fuel injection system |
| CN104632485A (en) * | 2014-12-29 | 2015-05-20 | 沪东重机有限公司 | Common-rail fuel oil jet system controlled by double electromagnetic valves and applied to low-speed diesel engine for ship |
| CN105626316A (en) * | 2016-02-29 | 2016-06-01 | 哈尔滨工程大学 | Combined type pressurizing double-electromagnetic-valve gas injection device |
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Application publication date: 20181113 |