CN109184988A - Variable boost compares electric-controlled fuel injector - Google Patents
Variable boost compares electric-controlled fuel injector Download PDFInfo
- Publication number
- CN109184988A CN109184988A CN201810835452.XA CN201810835452A CN109184988A CN 109184988 A CN109184988 A CN 109184988A CN 201810835452 A CN201810835452 A CN 201810835452A CN 109184988 A CN109184988 A CN 109184988A
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- valve
- oil
- control valve
- level
- needle
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Classifications
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- 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
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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- 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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- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
- F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
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- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The purpose of the present invention is to provide variable boosts than electric-controlled fuel injector, including pressurization control valve portion, three-level piston component, Injection Control valve portion, needle-valve portion, oil injector body.The present invention uses two-stage electromagnetic valve arrangement, controls the pressurization area of three-level piston, different pressure ratios can be effectively realized, so that fuel injection characteristic is more flexible；The action process of needle-valve is driven by guide electromagnetic valve, and needle-valve fast response time, control freedom degree is big, and fuel injection characteristic is flexibly controllable, effectively increases the dynamic property of diesel engine and the economy of fuel oil, and diesel engine is made to can satisfy stringenter emission regulation；Meanwhile supercharger control valve and injector control valve are immersed in low pressure oil, play cooling effect to solenoid valve, guarantee its safe and reliable work；Wherein the present invention uses the valve rod of formula of in injector control valve, and the weight of valve rod is also mitigated while having simplified way to cycle oil, accelerates the response speed of injector control valve.
Description
Technical field
The present invention relates to a kind of diesel engines, specifically diesel fuel system.
Background technique
Tradition machinery formula fuel injector is since the injection characteristics such as injection timing, injection pressure and injection rate are by high-pressure oil feed
The restriction of cam is pumped, it is not flexible that there are injection characteristics, low-response, the disadvantages of to distributive value control accuracy difference.In face of getting worse
Energy crisis and environmental pollution, emission regulation is increasingly strict, has been unable to satisfy now using the diesel engine of positive injector
Market is difficult to further improve to the requirement in terms of discharge and energy consumption, economy and emission performance.
Existing booster-type electric-controlled fuel injector has faster response speed and higher injection pressure, to the accurate of oil mass
Control also can satisfy requires stringent emission regulation instantly.But existing booster-type electric-controlled fuel injector is by charged piston
It restricts, cannot achieve flexible injection characteristics, fixed pressure ratio results in fixed injection pressure, cannot achieve to oil spout pressure
The flexible control of power.
Summary of the invention
The purpose of the present invention is to provide be able to achieve to control pressure ratio flexibly to reach the variable boost of different jeting effects
Compare electric-controlled fuel injector.
The object of the present invention is achieved like this:
Variable boost of the present invention is than electric-controlled fuel injector, it is characterized in that: including oil injector body, pressurization control valve portion, three-level
Piston component, Injection Control valve portion, needle-valve portion, pressurization control valve portion and three-level piston are mounted on fuel injector from top to bottom
In body, Injection Control valve portion and needle-valve portion are arranged in from top to bottom in tight cap, and tight cap is fixed below oil injector body, oil spout
Fuel inlet is set in body；
The pressurization control valve portion includes supercharger control valve upper valve base, supercharger control valve centre valve seat, dual-coil electromagnetic valve limit
Position orifice plate, charged piston limit orifice plate, supercharger control valve valve rod, level-one armature, second level armature, bacterium shape sleeve, supercharger control valve
Valve seat, dual-coil electromagnetic valve limit orifice plate and charged piston limit orifice plate are arranged from top to bottom among upper valve base, supercharger control valve, are pressurized
The head of control valve valve rod, which is located at, limits the supercharger control valve valve chamber that orifice plate and charged piston limit orifice plate are constituted by dual-coil electromagnetic valve
In, external is bacterium shape sleeve, and second level armature, the middle part installation of supercharger control valve valve rod are installed in the tail portion of supercharger control valve valve rod
Level-one armature, second level armature are located among supercharger control valve in valve seat, and level-one armature is located in dual-coil electromagnetic valve limit orifice plate, pressurization
Two-stage electromagnetic iron coil is wound in control valve upper valve base, winds level-one electromagnet coil, pressurization among supercharger control valve in valve seat
Supercharger control valve valve rod reset spring, pressurization control are set between control valve valve rod tail portion and supercharger control valve upper valve base above it
The part that valve valve rod processed is located at below level-one armature is cased with level-one armature fixed spring, the extension of bacterium shape sleeve and lower section
Charged piston, which limits, is arranged bacterium shape sleeve spring between orifice plate, the head of supercharger control valve valve rod is machined with T-type way to cycle oil, T
Type way to cycle oil includes the vertical access communicated and cross walkway, and dual-coil electromagnetic valve limits setting pressurization throttle orifice, second level on orifice plate
Pressure Increasing Oil-Line, charged piston, which limits, is arranged level-one Pressure Increasing Oil-Line and low pressure oil leak hole on orifice plate, pressurization throttle orifice, two-stage supercharging oil
Road, level-one Pressure Increasing Oil-Line are connected to supercharger control valve valve chamber with low pressure oil leak hole, be pressurized throttle orifice the other end be connected to fuel oil into
Mouthful, low pressure oil leak hole is connected to fuel tank；
The three-level piston component includes charged piston, piston return spring, and charged piston is three-level stepped cylinder structure,
It is respectively from top to bottom the first-third cylinder, and diameter successively decreases, the first cylinder and the charged piston above it limit between orifice plate
Form plunger shaft, plunger shaft limits the hole in orifice plate by charged piston and is connected to fuel inlet, the first cylinder and the second cylinder and
Level-one booster cavity is formed between oil injector body, and two-stage supercharging chamber is formed between the second cylinder and third cylinder and oil injector body, the
Three-level booster cavity is formed between three cylinders and oil injector body below, and piston return spring, level-one are installed in three-level booster cavity
Booster cavity is connected to level-one Pressure Increasing Oil-Line, and two-stage supercharging chamber is connected to two-stage supercharging oil circuit, and three-level booster cavity is connected to by check valve to be fired
Oil inlet, three-level booster cavity lower part are provided with Pressure Increasing Oil-Line；
The Injection Control valve portion includes injector control valve upper valve base, injector control valve limit orifice plate, needle-valve limit hole
Plate, injector control valve valve rod, armature, injector control valve upper valve base, injector control valve limit orifice plate and needle-valve limit orifice plate from upper
And lower setting, the setting of injector control valve valve rod limit in orifice plate in injector control valve, rank is installed on the top of injector control valve valve rod
Injector control valve valve rod return spring, injector control valve valve are installed between iron, armature and injector control valve upper valve base above it
Electromagnet coil is wound in injector control valve upper valve base outside bar return spring, and low pressure draining is set in injector control valve valve rod
Hole, injector control valve limits orifice plate and needle-valve limit orifice plate constitutes injector control valve valve chamber, and injector control valve stem lower portion includes
Tapered protrusion, injector control valve limit orifice plate on be arranged injector control valve in-line, injector control valve in-line be connected to fuel oil into
Mouthful, needle-valve, which limits, is arranged oil inlet metering-orifice on orifice plate, oil inlet metering-orifice is connected to injector control valve valve chamber；
The nozzle includes needle-valve set, needle-valve, and needle-valve limit orifice plate and needle-valve set are arranged from top to bottom, and needle-valve is mounted on needle
Oil holding slot is formed in valve pocket and between needle-valve set, needle-valve covers end and spray orifice is arranged, and needle-valve limits shape between orifice plate and needle-valve set
At control chamber, the top of needle-valve is located in control chamber and is cased with needle valve spring, and control chamber is connected to Injection Control by oil inlet metering-orifice
Valve valve chamber, oil holding slot are connected to Pressure Increasing Oil-Line and fuel inlet.
The present invention may also include:
1, when can be without under boost mode, pressurization control valve portion no power, check valve be opened；When Injection Control valve portion is logical
When electric, electromagnet attracts armature, and armature drives injector control valve valve rod to move upwards to by conical surface seal and open low pressure and let out
Oilhole, the fuel oil in control chamber enters electromagnetism valve chamber by the low pressure oil leak hole in injector control valve valve rod, using setting
It is returned in low-pressure reservoir in the low pressure oil way in electromagnetism valve chamber；It is formed when the elastic force of pressure and needle valve spring in control chamber
When resultant force is less than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve is lifted up, and spray orifice is opened；When Injection Control valve portion powers off
When, injector control valve valve rod is taken a seat under the elastic force effect of injector control valve valve rod return spring, in low pressure draining bore closure
High-pressure oil passage is opened simultaneously, control chamber builds pressure by oil inlet metering-orifice again, when the elastic force of pressure and needle valve spring in control chamber
When the resultant force of formation is greater than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve drops back into one's seat.
2, under low pressure charging mode, the level-one electromagnet coil power of pressurization control valve portion, level-one electromagnet attracts level-one
Armature, level-one armature drive supercharger control valve valve rod to move upward to level-one electromagnet spacing place, and bacterium shape sleeve is in bacterium shape sleeve
As supercharger control valve valve rod is lifted up under the action of spring spring force, low pressure oil leak hole is opened, until by bacterium shape sleeve
The conical surface seal of top；Fuel oil in level-one booster cavity flows through low pressure oil leak hole by level-one Pressure Increasing Oil-Line and returns to low-pressure reservoir
Interior, charged piston moves downward, the closed check valve at the oil inlet of three-level booster cavity, subsequent injector control valve partial current,
Electromagnet attracts armature, and armature drives injector control valve valve rod to move upwards by conical surface seal and to open low pressure oil leak hole,
Fuel oil in control chamber is flowed back in low-pressure reservoir by low pressure oil leak hole；When the resultant force of control cavity pressure and needle-valve reset spring is small
When hydraulic coupling of the fuel oil in oil holding slot to needle-valve, needle-valve is lifted up, and spray orifice is opened；When the power-off of Injection Control valve portion,
Injector control valve valve rod is taken a seat under the elastic force effect of injector control valve valve rod return spring, while low pressure draining bore closure
High-pressure oil passage is opened, control chamber builds pressure by oil inlet metering-orifice again, when the elastic force of pressure and needle valve spring in control chamber is formed
Resultant force when being greater than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve drops back into one's seat；When the power-off of pressurization control valve portion, pressurization
Control valve valve rod drives bacterium shape sleeve to take a seat together under the spring-force driven dual of supercharger control valve reset spring, in low pressure oil leak hole
The conical surface seal of bacterium shape sleeve upper end is opened while closing, high pressure fuel reenters level-one by level-one Pressure Increasing Oil-Line and is pressurized
Chamber, charged piston are again turned on back up into initial position, check valve, and fuel oil is entered in three-level booster cavity again by check valve
Enter oil holding slot.
3, under high pressure-charging mode, the level-one electromagnet coil power of pressurization control valve portion, level-one electromagnet attracts level-one
Armature, level-one armature drive supercharger control valve valve rod to move upward to level-one electromagnet spacing place, and bacterium shape sleeve is in bacterium shape sleeve
As supercharger control valve valve rod is lifted up under the action of spring spring force, until by the same of the conical surface seal above bacterium shape sleeve
When open low pressure oil leak hole, the fuel oil in level-one booster cavity flows through low pressure oil leak hole by level-one Pressure Increasing Oil-Line and returns to low-pressure reservoir
It is interior；The two-stage electromagnetic iron coil of pressurization control valve portion is powered, and two-stage electromagnetic iron attracts second level armature, and then second level armature drives
Supercharger control valve valve rod is detached from level-one armature and continues up at second level limiting position of armature, and supercharger control valve valve rod is detached from bacterium shape
Sleeve continuation up moves, and T-type way to cycle oil is opened, and the intracavitary fuel oil of two-stage supercharging passes through bacterium by two-stage supercharging oil circuit again
T-type way to cycle oil in shape sleeve is flow back into low-pressure reservoir, and charged piston moves downward, at the oil inlet of three-level booster cavity
Closed check valve, then injector control valve partial current, electromagnet attract armature, and armature drives Injection Control valve rod to move upwards
To by conical surface seal and open low pressure oil leak hole, the fuel oil in control chamber is flowed back in low-pressure reservoir by low pressure oil leak hole, when
When the hydraulic coupling that the resultant force for controlling cavity pressure and needle-valve reset spring is less than fuel oil in oil holding slot to needle-valve, needle-valve is lifted up,
Spray orifice is opened；When the power-off of Injection Control valve portion, elastic force of the injector control valve valve rod in injector control valve valve rod return spring
It takes a seat under effect, high-pressure oil passage is opened while low pressure draining bore closure, control chamber builds pressure by oil inlet metering-orifice again, works as control
When making the resultant force that the elastic force of intracavitary pressure and needle valve spring is formed and being greater than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve is again
It takes a seat；When the power-off of pressurization control valve portion, supercharger control valve valve rod is under the spring-force driven dual of supercharger control valve reset spring
Bacterium shape sleeve is driven to take a seat together, T-type way to cycle oil transverse direction oil circuit is closed, and bacterium shape sleeve is opened while low pressure draining bore closure
The conical surface seal of upper end, high pressure fuel reenter level-one booster cavity and second level by level-one Pressure Increasing Oil-Line and two-stage supercharging oil circuit
Booster cavity, charged piston are again turned on back up into initial position, check valve, and fuel oil enters three-level booster cavity by check valve
Inside enter back into oil holding slot.
Present invention has an advantage that 1, variable boost of the invention uses the increasing of three-level step circular table than electric-controlled fuel injector
Piston is pressed, changes pressure ratio by way of changing pressure application surface product, enables the fuel pressure in oil holding slot according to reality
Border operating condition is adjusted, and effectively improves the flexibility of oil spout, diesel engine is enable to better meet stringent exhaust method
Rule require, the effective economy and dynamic property for improving diesel engine；2, the supercharger control valve that the present invention uses can be realized multistage
Positioning, realizes that the on-off of a plurality of Pressure Increasing Oil-Line is controllable, so as to adjust the high pressure oil active area of charged piston, guarantees electronic control injection
The flexible control of device pressure ratio；3, the low pressure oil leak hole in injector control valve valve rod is connected with electromagnetism valve chamber, in control chamber
Fuel oil also plays the effect of cooling solenoid valve by the oil return of low pressure oil leak hole, can increase the stabilization of electromagnetic valve work
Property, in addition the low pressure oil leak hole in control valve valve rod reduces the quality of injector control valve valve rod, adds Injection Control response valve
Fastly.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is supercharger control valve partial schematic diagram；
Fig. 3 is three-level piston component schematic diagram；
Fig. 4 is injector control valve partial schematic diagram；
Fig. 5 is needle-valve portion schematic diagram.
Specific embodiment
It illustrates with reference to the accompanying drawing and the present invention is described in more detail:
In conjunction with Fig. 1-5, variable boost of the present invention than electric-controlled fuel injector, by pressurization control valve portion 1, three-level piston component 2,
The tight cap 5 of Injection Control valve portion 3, needle-valve portion 4, needle-valve and oil injector body 6 form.Pressurization control valve portion 1 is mainly by two
Grade electromagnet coil 9 and second level armature 10, level-one electromagnet coil 11 and level-one armature 12, charged piston limit orifice plate 16, bacterium
Shape sleeve 19, bacterium shape sleeve spring 18, dual-coil electromagnetic valve limit orifice plate 22, supercharger control valve valve rod 24, level-one armature fixed spring
23 and supercharger control valve valve rod reset spring 25 form, 24 head of supercharger control valve valve rod is provided with T-type way to cycle oil 14, bacterium shape
19 sets of sleeve, on 24 head of supercharger control valve valve rod, are cut off by relative motion and are opened the lateral oil circuit of T-type way to cycle oil 14, T
The longitudinal oil circuit of type way to cycle oil 14 is connected with low pressure oil leak hole 17, supercharger control valve valve chamber 20 and level-one Pressure Increasing Oil-Line 15, two
Grade Pressure Increasing Oil-Line 13 and pressurization throttle orifice 21 communicate, and bacterium shape sleeve 19 is located in supercharger control valve valve chamber 20.Three-level piston component 2
It mainly include charged piston 32, piston return spring 29 and check valve 31, charged piston 32 is three-level step frustum cone structure, is increased
Press piston 32 and oil injector body 6 to constitute level-one booster cavity 26, two-stage supercharging chamber 27 and three-level booster cavity 28, level-one booster cavity 26 with
Level-one Pressure Increasing Oil-Line 15 is connected, and two-stage supercharging chamber 27 is connected with two-stage supercharging oil circuit 13, three-level booster cavity 28 and oil holding slot
44 are connected, and are connected by check valve 31 with high-pressure oil passage.Low pressure oil leak hole 36 is machined in injector control valve valve rod 35,
It is connected with electromagnetism valve chamber, electromagnetism valve chamber is connected with low-pressure reservoir.
Fig. 1 is overall structure diagram of the variable boost of the present invention than electric-controlled fuel injector, mainly by pressurization control valve portion
1, the tight cap 5 of three-level piston component 2, Injection Control valve portion 3, needle-valve portion 4, needle-valve and oil injector body 6 form.Fastening cap 7
Pressurization control valve portion 1 is linked closely by screw thread and is fixed on oil injector body 6, the tight cap 5 of nozzle passes through screw thread for injector control valve
Part 3 and needle-valve portion 4, which are pressed together and linked closely, to be fixed on oil injector body 6.
Fig. 2 is pressurization control valve portion 1 of the variable boost than electric-controlled fuel injector, and pressurization control valve portion 1 mainly includes two
Grade electromagnet coil 9, two-stage electromagnetic valve 10, level-one electromagnet coil 11, level-one armature 12, charged piston limit orifice plate 16, bacterium
Shape sleeve 19, bacterium shape sleeve spring 18, dual-coil electromagnetic valve limit orifice plate 22, supercharger control valve valve rod 24, level-one armature fixed spring
23 and supercharger control valve valve rod reset spring 25.Level-one electromagnet coil 11 is superimposed placement with two-stage electromagnetic iron coil 9, wherein
Two-stage electromagnetic iron coil 9 is located at the top of level-one electromagnet coil 11.Dual-coil electromagnetic valve limits orifice plate 22 and charged piston limit hole
Plate 16 forms supercharger control valve valve chamber 20, is machined with pressurization throttle orifice 21 and two-stage supercharging oil circuit on dual-coil electromagnetic valve limit orifice plate 22
13, the one end for being pressurized throttle orifice 21 and two-stage supercharging oil circuit 13 is all connected with supercharger control valve valve chamber 20, is pressurized throttle orifice 21
The other end is connected with high-pressure oil passage, and high pressure oil is introduced supercharger control valve valve chamber 20.It is processed on charged piston limit orifice plate 22
Have a low pressure oil leak hole 17 and level-one Pressure Increasing Oil-Line 15, low pressure oil leak hole 17 and level-one Pressure Increasing Oil-Line 15 all with supercharger control valve valve chamber
20 are connected, and low pressure oil leak hole 17 is connected to low-pressure reservoir.Bacterium shape sleeve 19 is placed in supercharger control valve valve chamber 20, bacterium shape set
For cylinder 19 by 18 pressing sleeve of bacterium shape sleeve spring on the head of supercharger control valve valve rod 24, supercharger control valve valve rod 24 can be in bacterium shape
It is slided up and down in sleeve 19.24 head of supercharger control valve valve rod is machined with T-type way to cycle oil 14, T-type way to cycle oil 14 it is vertical
Access is connected with the access of bacterium shape sleeve 19, and when bacterium shape sleeve 19 is pressed on supercharger control valve valve rod 24, T-type oil return is logical
The cross walkway on road 14 is to close, when supercharger control valve valve rod 24 is moved up with respect to bacterium shape sleeve 19, T-type way to cycle oil
14 open.Supercharger control valve valve rod 24 and bacterium shape sleeve 19 are pressed on charged piston limit by supercharger control valve valve rod reset spring 25
On the orifice plate 16 of position, and low pressure oil leak hole 17 is closed.Supercharger control valve valve rod 24 passes through the hole among level-one electromagnet coil 11
Hole and dual-coil electromagnetic valve limit orifice plate 22, are placed with level-one rank between level-one electromagnet coil 11 and dual-coil electromagnetic valve limit orifice plate 22
Iron 12, supercharger control valve valve rod 24 pass through 12 center of level-one armature, and level-one armature 12 is fixed on pressurization by level-one armature spring 23
On control valve valve rod 24, magneticaction of the level-one armature 12 by level-one electromagnet coil 11, when level-one armature 12 is attracted,
Supercharger control valve valve rod 24 can be detached from level-one armature 12 and move upwards.Second level armature 10 is placed in the top of supercharger control valve valve rod 24
End, and connect with supercharger control valve valve rod 24, second level armature 10 can be by the electromagnetic force of two-stage electromagnetic iron coil 9.
Fig. 3 show structural schematic diagram of the variable boost than the three-level piston component 2 of electric-controlled fuel injector, including charged piston
32, oil injector body 6, piston return spring 29 and check valve 31.Charged piston 32 is a three-level stepped cylinder structure, with pressurization
Piston limit orifice plate 16 collectively forms plunger shaft 33, and high pressure oil is passed through plunger shaft 33 by the hole opened on piston limit orifice plate 16.
Charged piston 32 and oil injector body 6 collectively form level-one booster cavity 26, two-stage supercharging chamber 27 and three-level booster cavity 28, wherein level-one
Booster cavity 26 and two-stage supercharging chamber 27 are connected with level-one Pressure Increasing Oil-Line 15 and two-stage supercharging oil circuit 13 respectively, supercharger control valve valve
High pressure oil in chamber 20 respectively enters level-one booster cavity 24 by level-one Pressure Increasing Oil-Line 15 and two-stage supercharging oil circuit 13 and second level increases
Press chamber 25.Three-level booster cavity 28 is connected by check valve 31 with high-pressure oil passage, is placed with piston return in three-level booster cavity 28
Spring 29, while 28 lower part of three-level booster cavity is also provided with Pressure Increasing Oil-Line 30, Pressure Increasing Oil-Line 30 draws the oil in three-level booster cavity 28
Enter to oil holding slot 44.
Fig. 4 show structural schematic diagram of the variable boost than the Injection Control valve portion 3 of electric-controlled fuel injector, including electromagnet
31, injector control valve valve rod 35, armature 40, injector control valve valve rod return spring 42 and injector control valve limit orifice plate 41.Spray
Oil control valve limit orifice plate 41 and needle-valve limit orifice plate 38 collectively form injector control valve valve chamber 37, under injector control valve valve rod 35
End is a bacterium shape structure, is located in injector control valve valve chamber 37.Low pressure oil leak hole is machined among injector control valve valve rod 35
36, injector control valve valve rod 35 is pressed on needle-valve limit orifice plate 38 by injector control valve valve rod return spring 42, and low pressure is let out
Oilhole 36 is closed.High-pressure oil passage is provided in injector control valve limit orifice plate 41 towards injector control valve valve chamber 37, while needle-valve limits
It is also provided with oil inlet metering-orifice 39 on the orifice plate of position, 39 one end of oil inlet metering-orifice is connected to injector control valve valve chamber 37, the other end and control chamber
43 connections, high pressure oil is introduced into control chamber 43.
Fig. 5 show structural schematic diagram of the variable boost than the needle-valve portion 4 of electric-controlled fuel injector, including needle-valve 45, needle-valve
Spring 48 and nozzle 47.Nozzle 47 and needle-valve limit orifice plate constitute control chamber 43 and oil holding slot 44, and needle valve spring 48 is located at control
In chamber 43.47 lower end of nozzle is provided with spray orifice 46, when the resultant force of the pressure initiation in 48 elastic force of needle valve spring and control chamber 43 is greater than
When the pressure that oil holding slot 44 applies needle-valve, needle-valve 45, which is taken a seat, closes spray orifice 46；When needle-valve 45 lifts, spray orifice 46 and Sheng oil
Slot 44 is connected to, commencement of fuel injection.
Fuel oil enters variable boost than electric-controlled fuel injector from fuel inlet 8, draws one at dual-coil electromagnetic valve limit orifice plate 22
Branch is entered in supercharger control valve valve chamber 20 by being pressurized throttle orifice 21, is divided into two using supercharger control valve valve chamber 20
Road, enters level-one booster cavity 26 by level-one Pressure Increasing Oil-Line 15 all the way, and another way enters second level by two-stage supercharging oil circuit 13
Booster cavity 27.Fuel oil continues to draw a branch at charged piston limit orifice plate 16 down, this branch leads to plunger shaft 33.
Fuel oil is divided into two-way in the continuation of oil injector body 6 down and wherein: continuing to limit orifice plate 41 by injector control valve down all the way
In high-pressure oil passage enter injector control valve valve chamber 37, then control chamber 43 is entered by oil inlet metering-orifice 39；Another way passes through list
It enters in three-level booster cavity 28 to valve 31, is entered in oil holding slot 44 by Pressure Increasing Oil-Line 30 still further below.Plunger shaft 33 at this time
Interior hydraulic coupling is less than level-one booster cavity 26, two-stage supercharging chamber 27 and hydraulic coupling and piston return bullet in three-level booster cavity 28
The resultant force that the elastic force of spring 29 is formed, charged piston 32 is in extreme higher position, therefore the fuel oil in three-level booster cavity 28 is not pressurized.
The resultant force that the pressure in oil holding slot 44 and needle valve spring 48 are formed simultaneously is greater than the pressure in control chamber 43, and needle-valve 45 is fallen at this time
Seat.According to the difference of injection process, the variable boost operating mode that than electric-controlled fuel injector can be divided into three kinds different: without pressurization mould
Formula, low pressure charging mode and high pressure-charging mode.
When variable boost works under no boost mode than electric-controlled fuel injector, 1 no power of pressurization control valve portion, due to
The pressure balance of each acting surface of three-level piston at this time, check valve 31 is opened, therefore the fuel pressure in three-level booster cavity 28 is simultaneously
Do not increase, the fuel pressure in oil holding slot 44 is equal to the pressure of check valve another side.When Injection Control valve portion 3 is powered, electricity
Magnet 34 attracts armature 40, and armature 40 drives injector control valve valve rod 35 to move upwards to by conical surface seal and open low pressure and let out
Oilhole 36, the fuel oil in control chamber 43 enter electromagnetism valve chamber by the low pressure oil leak hole 36 in injector control valve valve rod 35, then
It is returned in low-pressure reservoir by the low pressure oil way being arranged in electromagnetism valve chamber, thus the pressure reduction in control chamber 43.Work as control
When the resultant force that the elastic force of pressure and needle valve spring 48 in chamber 43 processed is formed is less than the upward hydraulic coupling of fuel oil in oil holding slot 44, needle
Valve 45 is lifted up, and spray orifice 46 is opened, and variable boost is than electric-controlled fuel injector commencement of fuel injection.When Injection Control valve portion 3 powers off,
Injector control valve valve rod 35 is taken a seat under the elastic force effect of injector control valve valve rod return spring 42, is closed by low pressure oil leak hole 36
High-pressure oil passage is opened while closing, control chamber 43 builds pressure by oil inlet metering-orifice 39 again, when the pressure and needle-valve in control chamber 43
When the resultant force that the elastic force of spring 48 is formed is greater than the upward hydraulic coupling of fuel oil in oil holding slot 44, needle-valve 45 drops back into one's seat, and can be changed and increases
Pressure ratio electric-controlled fuel injector stops oil spout.
When variable boost works under low pressure charging mode than electric-controlled fuel injector, the level-one electromagnetism of pressurization control valve portion 1
Iron coil 11 is powered, and level-one electromagnet attracts level-one armature 12, and level-one armature 12 drives supercharger control valve valve rod 24 to move upwards
To level-one electromagnet spacing place.Bacterium shape sleeve 19 is under the action of bacterium shape 18 spring force of sleeve spring with supercharger control valve valve rod
24 are lifted up, and low pressure oil leak hole 17 is opened, until by the conical surface seal of the top of bacterium shape sleeve 19.In level-one booster cavity 26
Fuel oil flows through low pressure oil leak hole 17 by level-one Pressure Increasing Oil-Line 15 and returns in low-pressure reservoir, at this time the pressure in level-one booster cavity 26
It reduces, the pressure in plunger shaft 33 is greater than level-one booster cavity 26, two-stage supercharging chamber 27 and pressure and work in three-level booster cavity 28
The sum of the elastic force of return spring 29 is filled in, charged piston 32 moves downward, and the check valve 31 at the oil inlet of three-level booster cavity 28 closes
It closes, the fuel pressure in three-level booster cavity 28, which is pressurized, to be increased, and then the fuel pressure in oil holding slot 44 is caused to increase.Subsequent oil spout
3 partial current of control valve, electromagnet 34 attract armature 40, and armature 40 drives injector control valve valve rod 35 to move upwards to bore
Face seals and opens low pressure oil leak hole 36, and the fuel oil in control chamber 43 is flowed back in low-pressure reservoir by low pressure oil leak hole 36.At this time
Pressure reduction in control chamber 43, when the resultant force of its pressure and needle-valve reset spring 48 is less than in oil holding slot 44 fuel oil to needle-valve 45
Hydraulic coupling when, needle-valve 45 is lifted up, spray orifice 46 open, fuel injector commencement of fuel injection.When Injection Control valve portion 3 powers off,
Injector control valve valve rod 35 is taken a seat under the elastic force effect of injector control valve valve rod return spring 42, is closed by low pressure oil leak hole 36
High-pressure oil passage is opened while closing, control chamber 43 builds pressure by oil inlet metering-orifice again, when the pressure and needle-valve bullet in control chamber 43
When the resultant force that the elastic force of spring 48 is formed is greater than the upward hydraulic coupling of fuel oil in oil holding slot 44, needle-valve 45 drops back into one's seat, variable boost
Stop oil spout than electric-controlled fuel injector.When pressurization control valve portion 1 powers off, supercharger control valve valve rod 24 is resetted in supercharger control valve
It drives bacterium shape sleeve 19 to take a seat together under the spring-force driven dual of spring 25, bacterium shape is opened while closing low pressure oil leak hole 17
The conical surface seal of 19 upper end of sleeve, high pressure fuel reenter level-one booster cavity 26 by level-one Pressure Increasing Oil-Line 15, at this time piston
Pressure in chamber 33 is less than level-one booster cavity 26, two-stage supercharging chamber 27 and pressure and piston return spring in three-level booster cavity 28
The sum of 29 elastic force, charged piston 32 is back up into initial position.Pressure reduction in three-level booster cavity 28, check valve 31 is again
It opens, fuel oil is entered in three-level booster cavity 29 by check valve 31 and enters back into oil holding slot 44.
When variable boost works under high pressure-charging mode than electric-controlled fuel injector, the level-one of pressurization control valve portion 1 first
Electromagnet coil 11 is powered, and level-one electromagnet attracts level-one armature 12, and level-one armature 12 drives supercharger control valve valve rod 24 upward
Move to level-one electromagnet spacing place.Bacterium shape sleeve 19 is under the action of bacterium shape 18 spring force of sleeve spring with supercharger control valve
Valve rod 24 is lifted up, and opens low pressure oil leak hole 17 while by the conical surface seal of the top of bacterium shape sleeve 19.Level-one at this time
Fuel oil in booster cavity 26 flows through low pressure oil leak hole 17 by level-one Pressure Increasing Oil-Line 15 and returns in low-pressure reservoir, level-one booster cavity 26
Pressure reduction.Then the two-stage electromagnetic iron coil 9 of pressurization control valve portion 1 is powered, and two-stage electromagnetic iron attracts second level armature 10, after
And second level armature 10 drives the disengaging level-one armature 12 of supercharger control valve valve rod 24 to continue up at second level limiting position of armature.This
When supercharger control valve valve rod 24 be detached from the continuation of bacterium shape sleeve 19 and up move, T-type way to cycle oil 14 is opened, two-stage supercharging chamber 27
Interior fuel oil is flow back into low-pressure reservoir by the T-type way to cycle oil 14 in bacterium shape sleeve 19 again by two-stage supercharging oil circuit 13,
27 pressure of two-stage supercharging chamber also declines.The pressure in plunger shaft 33 is greater than level-one booster cavity 26, two-stage supercharging chamber 27 at this time
The resultant force formed with the elastic force of pressure and charged piston return spring 29 in three-level booster cavity 28, charged piston 32 are transported downwards
Dynamic, the check valve 31 at the oil inlet of three-level booster cavity 28 is closed, and the fuel pressure in three-level booster cavity 28 increases, and then causes
Fuel pressure in oil holding slot 44 increases.Then Injection Control valve portion 3 is powered, and electromagnet 34 attracts armature 40,40 band of armature
Dynamic Injection Control valve rod 35 moves upwards by conical surface seal and to open low pressure oil leak hole 36, and the fuel oil in control chamber 43 passes through
Low pressure oil leak hole 36 flows back in low-pressure reservoir.Pressure reduction in control chamber 43 at this time, when its pressure and needle-valve reset spring 48
Resultant force when being less than that fuel oil is to the hydraulic coupling of 45 valve of needle in oil holding slot 44, needle-valve 45 is lifted up, and spray orifice 46 is opened, variable boost
Than electric-controlled fuel injector commencement of fuel injection.When Injection Control valve portion 3 powers off, injector control valve valve rod 35 is in injector control valve valve rod
It takes a seat under the elastic force effect of return spring 42, high-pressure oil passage is opened while closing low pressure oil leak hole 36, control chamber 43 is logical
It crosses oil inlet metering-orifice and builds pressure again, when the resultant force that the elastic force of pressure and needle valve spring 48 in control chamber 43 is formed is greater than oil holding slot 44
When the upward hydraulic coupling of interior fuel oil, needle-valve 45 drops back into one's seat, and fuel injector stops oil spout.When pressurization control valve portion 1 powers off, increase
Pressure control valve valve rod 24 drives bacterium shape sleeve 18 to take a seat together under the spring-force driven dual of supercharger control valve reset spring 25, first will
The lateral oil circuit of T-type way to cycle oil 14 is closed, and 19 upper end of bacterium shape sleeve is then opened while closing low pressure oil leak hole 17
Conical surface seal, high pressure fuel reenter level-one booster cavity 26 and second level by level-one Pressure Increasing Oil-Line 15 and two-stage supercharging oil circuit 13
Booster cavity 27, the pressure in plunger shaft 33 is less than in level-one booster cavity 26, two-stage supercharging chamber 27 and three-level booster cavity 28 at this time
The sum of the elastic force of pressure and charged piston return spring 29, charged piston 32 is back up into initial position.In three-level booster cavity 28
Pressure reduction, check valve 31 is again turned on, and fuel oil enters in three-level booster cavity 28 by check valve 31 and enters back into Sheng oil
Slot 44.
The course of work by variable boost than electric-controlled fuel injector is it is found that the present invention passes through change pressurization control during the work time
The action response of valve processed is, it can be achieved that different pressure ratios can be realized fuel injector more clever to reach different injection pressures
Injection characteristics living.Present invention employs the injector control valves of electromagnetic type simultaneously, and which further improves the response of fuel injector speed
Degree and control precision, make multi-injection working method is implemented as possibility.Effectively increase the dynamic property and combustion of diesel engine
The economy of oil.Way to cycle oil is set in injector control valve valve rod, oil return circuit is arranged in injector control valve, is played
The effect of cooling solenoid valve improves the reliability of the present invention at work.
Claims (5)
1. variable boost is than electric-controlled fuel injector, it is characterized in that: include oil injector body, pressurization control valve portion, three-level piston component,
Injection Control valve portion, needle-valve portion, pressurization control valve portion and three-level piston are mounted in oil injector body from top to bottom, oil spout
Control valve portion and needle-valve portion are arranged in from top to bottom in tight cap, and tight cap is fixed below oil injector body, set in oil injector body
Set fuel inlet；
The pressurization control valve portion includes supercharger control valve upper valve base, supercharger control valve centre valve seat, dual-coil electromagnetic valve limit hole
Plate, charged piston limit orifice plate, supercharger control valve valve rod, level-one armature, second level armature, bacterium shape sleeve, supercharger control valve upper valve
Valve seat, dual-coil electromagnetic valve limit orifice plate and charged piston limit orifice plate are arranged from top to bottom among seat, supercharger control valve, pressurization control
The head of valve valve rod is located to be limited in the supercharger control valve valve chamber that orifice plate and charged piston limit orifice plate are constituted by dual-coil electromagnetic valve,
Outside is bacterium shape sleeve, and second level armature is installed in the tail portion of supercharger control valve valve rod, and level-one is installed at the middle part of supercharger control valve valve rod
Armature, second level armature are located among supercharger control valve in valve seat, and level-one armature is located in dual-coil electromagnetic valve limit orifice plate, pressurization control
Two-stage electromagnetic iron coil is wound in valve upper valve base, winds level-one electromagnet coil, pressurization control among supercharger control valve in valve seat
Supercharger control valve valve rod reset spring, supercharger control valve are set between valve valve rod tail portion and supercharger control valve upper valve base above it
The part that valve rod is located at below level-one armature is cased with level-one armature fixed spring, the extension of bacterium shape sleeve and the pressurization of lower section
Bacterium shape sleeve spring is set between piston limit orifice plate, and the head of supercharger control valve valve rod is machined with T-type way to cycle oil, and T-type returns
Oily access includes the vertical access communicated and cross walkway, and dual-coil electromagnetic valve limits setting pressurization throttle orifice, two-stage supercharging on orifice plate
Oil circuit, charged piston, which limits, is arranged level-one Pressure Increasing Oil-Line and low pressure oil leak hole on orifice plate, pressurization throttle orifice, two-stage supercharging oil circuit,
Level-one Pressure Increasing Oil-Line is connected to supercharger control valve valve chamber with low pressure oil leak hole, is pressurized the other end connection fuel inlet of throttle orifice,
Low pressure oil leak hole is connected to fuel tank；
The three-level piston component includes charged piston, piston return spring, and charged piston is three-level stepped cylinder structure, from upper
And lower is respectively the first-third cylinder, and diameter successively decreases, the first cylinder and the charged piston above it are limited and are formed between orifice plate
Plunger shaft, plunger shaft limit the hole in orifice plate by charged piston and are connected to fuel inlet, the first cylinder and the second cylinder and oil spout
Level-one booster cavity is formed between body, and two-stage supercharging chamber, third column are formed between the second cylinder and third cylinder and oil injector body
Three-level booster cavity is formed between body and oil injector body below, and piston return spring, level-one pressurization are installed in three-level booster cavity
Chamber be connected to level-one Pressure Increasing Oil-Line, two-stage supercharging chamber be connected to two-stage supercharging oil circuit, three-level booster cavity by check valve connection fuel oil into
Mouthful, three-level booster cavity lower part is provided with Pressure Increasing Oil-Line；
The Injection Control valve portion includes injector control valve upper valve base, injector control valve limit orifice plate, needle-valve limit orifice plate, spray
Oil control valve valve rod, armature, injector control valve upper valve base, injector control valve limit orifice plate and needle-valve limit orifice plate are set from top to bottom
It sets, the setting of injector control valve valve rod limits in orifice plate in injector control valve, and armature, armature are installed in the top of injector control valve valve rod
Injector control valve valve rod return spring, injector control valve valve rod return bullet are installed between the injector control valve upper valve base above it
Electromagnet coil is wound in injector control valve upper valve base outside spring, and low pressure oil leak hole, oil spout are set in injector control valve valve rod
Control valve limits orifice plate and needle-valve limit orifice plate constitutes injector control valve valve chamber, and injector control valve stem lower portion includes that taper is convex
It rises, injector control valve, which limits, is arranged injector control valve in-line on orifice plate, injector control valve in-line is connected to fuel inlet, needle-valve
It limits and oil inlet metering-orifice is set on orifice plate, oil inlet metering-orifice is connected to injector control valve valve chamber；
The nozzle includes needle-valve set, needle-valve, and needle-valve limit orifice plate and needle-valve set are arranged from top to bottom, and needle-valve is mounted on needle-valve set
In and between needle-valve set form oil holding slot, needle-valve covers end and spray orifice is arranged, and needle-valve is limited to be formed between orifice plate and needle-valve set and be controlled
Chamber processed, the top of needle-valve are located in control chamber and are cased with needle valve spring, and control chamber is connected to injector control valve valve by oil inlet metering-orifice
Chamber, oil holding slot are connected to Pressure Increasing Oil-Line and fuel inlet.
2. variable boost according to claim 1 is than electric-controlled fuel injector, it is characterized in that: when that can be pressurized without under boost mode
Valve portion no power is controlled, check valve is opened；When injector control valve partial current, electromagnet attracts armature, and armature drives spray
Oil control valve valve rod moves upwards by conical surface seal and to open low pressure oil leak hole, and the fuel oil in control chamber passes through Injection Control
Low pressure oil leak hole in valve valve rod enters electromagnetism valve chamber, returns to low pressure using the low pressure oil way being arranged in electromagnetism valve chamber
In fuel tank；When the resultant force that the elastic force of pressure and needle valve spring in control chamber is formed is less than the hydraulic coupling that fuel oil is upward in oil holding slot
When, needle-valve is lifted up, and spray orifice is opened；When the power-off of Injection Control valve portion, injector control valve valve rod is in injector control valve valve
It takes a seat under the elastic force effect of bar return spring, opens high-pressure oil passage while low pressure draining bore closure, control chamber passes through oil inlet
Metering-orifice builds pressure again, when to be greater than fuel oil in oil holding slot upward for the resultant force that the elastic force of pressure and needle valve spring in control chamber is formed
When hydraulic coupling, needle-valve drops back into one's seat.
3. variable boost according to claim 1 or 2 is than electric-controlled fuel injector, it is characterized in that: pressurization is controlled under low pressure charging mode
The level-one electromagnet coil power of valve portion processed, level-one electromagnet attract level-one armature, and level-one armature drives supercharger control valve valve
Bar moves upward to level-one electromagnet spacing place, and bacterium shape sleeve is under the action of bacterium shape sleeve spring spring force with pressurization control
Valve valve rod is lifted up, and low pressure oil leak hole is opened, until by the conical surface seal above bacterium shape sleeve；Combustion in level-one booster cavity
Oil flows through low pressure oil leak hole by level-one Pressure Increasing Oil-Line and returns in low-pressure reservoir, and charged piston moves downward, three-level booster cavity
Closed check valve at oil inlet, subsequent injector control valve partial current, electromagnet attract armature, and armature drives injector control valve
Valve rod moves upwards by conical surface seal and to open low pressure oil leak hole, and the fuel oil in control chamber is flowed back to low by low pressure oil leak hole
In pressure oil case；When the resultant force for controlling cavity pressure and needle-valve reset spring is less than the hydraulic coupling of fuel oil in oil holding slot to needle-valve, needle
Valve is lifted up, and spray orifice is opened；When the power-off of Injection Control valve portion, injector control valve valve rod is in injector control valve valve rod return
It takes a seat under the elastic force effect of spring, high-pressure oil passage is opened while low pressure draining bore closure, control chamber passes through oil inlet metering-orifice weight
Newly-built pressure, when the resultant force that the elastic force of pressure and needle valve spring in control chamber is formed is greater than the hydraulic coupling that fuel oil is upward in oil holding slot
When, needle-valve drops back into one's seat；When the power-off of pressurization control valve portion, bullet of the supercharger control valve valve rod in supercharger control valve reset spring
Spring force effect is lower to drive bacterium shape sleeve to take a seat together, and the conical surface that bacterium shape sleeve upper end is opened while low pressure draining bore closure is close
Envelope, high pressure fuel reenter level-one booster cavity by level-one Pressure Increasing Oil-Line, and charged piston is back up into initial position, check valve
It is again turned on, fuel oil is entered in three-level booster cavity by check valve and enters back into oil holding slot.
4. variable boost according to claim 1 or 2 is than electric-controlled fuel injector, it is characterized in that: pressurization is controlled under high pressure-charging mode
The level-one electromagnet coil power of valve portion processed, level-one electromagnet attract level-one armature, and level-one armature drives supercharger control valve valve
Bar moves upward to level-one electromagnet spacing place, and bacterium shape sleeve is under the action of bacterium shape sleeve spring spring force with pressurization control
Valve valve rod is lifted up, and opens low pressure oil leak hole while by conical surface seal above bacterium shape sleeve, in level-one booster cavity
Fuel oil low pressure oil leak hole flowed through by level-one Pressure Increasing Oil-Line return in low-pressure reservoir；The two-stage electromagnetic iron of pressurization control valve portion
Coil be powered, two-stage electromagnetic iron attract second level armature, then second level armature drive supercharger control valve valve rod be detached from level-one armature after
Continuous to move upward at second level limiting position of armature, supercharger control valve valve rod is detached from the continuation of bacterium shape sleeve and up moves, and T-type oil return is led to
Road is opened, and the intracavitary fuel oil of two-stage supercharging is flow back by the T-type way to cycle oil that two-stage supercharging oil circuit passes through again in bacterium shape sleeve
In low-pressure reservoir, charged piston is moved downward, the closed check valve at the oil inlet of three-level booster cavity, then Injection Control valve portion
It point is powered, electromagnet attracts armature, and armature drives Injection Control valve rod to move upwards to by conical surface seal and open low pressure and let out
Oilhole, the fuel oil in control chamber are flowed back in low-pressure reservoir by low pressure oil leak hole, when control cavity pressure and needle-valve reset spring
When resultant force is less than that fuel oil is to the hydraulic coupling of needle-valve in oil holding slot, needle-valve is lifted up, and spray orifice is opened；When Injection Control valve portion is disconnected
When electric, injector control valve valve rod is taken a seat under the elastic force effect of injector control valve valve rod return spring, in low pressure draining bore closure
While open high-pressure oil passage, control chamber builds pressure by oil inlet metering-orifice again, when the bullet of pressure and needle valve spring in control chamber
When the resultant force that power is formed is greater than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve drops back into one's seat；When pressurization control valve portion powers off
When, supercharger control valve valve rod drives bacterium shape sleeve to take a seat together under the spring-force driven dual of supercharger control valve reset spring, and T-type returns
Oily access transverse direction oil circuit is closed, and low pressure draining bore closure while opens the conical surface seal of bacterium shape sleeve upper end, and high pressure fuel is logical
It crosses level-one Pressure Increasing Oil-Line and two-stage supercharging oil circuit reenters level-one booster cavity and two-stage supercharging chamber, charged piston is back up into first
Beginning position, check valve are again turned on, and fuel oil is entered in three-level booster cavity by check valve and enters back into oil holding slot.
5. variable boost according to claim 3 is than electric-controlled fuel injector, it is characterized in that: under high pressure-charging mode, pressurization control
The level-one electromagnet coil power of valve portion, level-one electromagnet attract level-one armature, and level-one armature drives supercharger control valve valve rod
Level-one electromagnet spacing place is moved upward to, bacterium shape sleeve is under the action of bacterium shape sleeve spring spring force with supercharger control valve
Valve rod is lifted up, and opens low pressure oil leak hole while by conical surface seal above bacterium shape sleeve, in level-one booster cavity
Fuel oil flows through low pressure oil leak hole by level-one Pressure Increasing Oil-Line and returns in low-pressure reservoir；The two-stage electromagnetic iron wire of pressurization control valve portion
Circle is powered, and two-stage electromagnetic iron attracts second level armature, and then second level armature drives supercharger control valve valve rod to be detached from level-one armature and continues
It moves upward at second level limiting position of armature, supercharger control valve valve rod is detached from the continuation of bacterium shape sleeve and up moves, by T-type way to cycle oil
Open, the intracavitary fuel oil of two-stage supercharging by two-stage supercharging oil circuit pass through again the T-type way to cycle oil in bacterium shape sleeve flow back into it is low
In pressure oil case, charged piston is moved downward, the closed check valve at the oil inlet of three-level booster cavity, then Injection Control valve portion
It is powered, electromagnet attracts armature, and armature drives Injection Control valve rod to move upwards by conical surface seal and to open low pressure draining
Hole, the fuel oil in control chamber are flowed back in low-pressure reservoir by low pressure oil leak hole, when the conjunction of control cavity pressure and needle-valve reset spring
When power is less than that fuel oil is to the hydraulic coupling of needle-valve in oil holding slot, needle-valve is lifted up, and spray orifice is opened；When Injection Control valve portion powers off
When, injector control valve valve rod is taken a seat under the elastic force effect of injector control valve valve rod return spring, in low pressure draining bore closure
High-pressure oil passage is opened simultaneously, control chamber builds pressure by oil inlet metering-orifice again, when the elastic force of pressure and needle valve spring in control chamber
When the resultant force of formation is greater than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve drops back into one's seat；When the power-off of pressurization control valve portion,
Supercharger control valve valve rod drives bacterium shape sleeve to take a seat together under the spring-force driven dual of supercharger control valve reset spring, T-type oil return
Access transverse direction oil circuit is closed, and the conical surface seal of bacterium shape sleeve upper end is opened while low pressure draining bore closure, and high pressure fuel passes through
Level-one Pressure Increasing Oil-Line and two-stage supercharging oil circuit reenter level-one booster cavity and two-stage supercharging chamber, and charged piston is back up into initial
Position, check valve are again turned on, and fuel oil is entered in three-level booster cavity by check valve and enters back into oil holding slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835452.XA CN109184988A (en) | 2018-07-26 | 2018-07-26 | Variable boost compares electric-controlled fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835452.XA CN109184988A (en) | 2018-07-26 | 2018-07-26 | Variable boost compares electric-controlled fuel injector |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5954030A (en) * | 1994-12-01 | 1999-09-21 | Oded E. Sturman | Valve controller systems and methods and fuel injection systems utilizing the same |
| JP2006161568A (en) * | 2004-12-02 | 2006-06-22 | Nippon Soken Inc | Control valve and fuel injection valve having the same |
| WO2013086427A1 (en) * | 2011-12-07 | 2013-06-13 | Quantlogic Corporation | A fuel injector for multi-fuel injection with pressure intensification and a variable orifice |
| CN104018969A (en) * | 2014-05-29 | 2014-09-03 | 哈尔滨工程大学 | Piezoelectric control pressure accumulation and stabilization oil sprayer |
| 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 |
-
2018
- 2018-07-26 CN CN201810835452.XA patent/CN109184988A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5954030A (en) * | 1994-12-01 | 1999-09-21 | Oded E. Sturman | Valve controller systems and methods and fuel injection systems utilizing the same |
| JP2006161568A (en) * | 2004-12-02 | 2006-06-22 | Nippon Soken Inc | Control valve and fuel injection valve having the same |
| WO2013086427A1 (en) * | 2011-12-07 | 2013-06-13 | Quantlogic Corporation | A fuel injector for multi-fuel injection with pressure intensification and a variable orifice |
| CN104018969A (en) * | 2014-05-29 | 2014-09-03 | 哈尔滨工程大学 | Piezoelectric control pressure accumulation and stabilization oil sprayer |
| 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 |
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Application publication date: 20190111 |
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