CN109236526A - Pressure accumulation type bivalve electric-controlled fuel injector - Google Patents
Pressure accumulation type bivalve electric-controlled fuel injector Download PDFInfo
- Publication number
- CN109236526A CN109236526A CN201810835570.0A CN201810835570A CN109236526A CN 109236526 A CN109236526 A CN 109236526A CN 201810835570 A CN201810835570 A CN 201810835570A CN 109236526 A CN109236526 A CN 109236526A
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- China
- Prior art keywords
- control valve
- valve
- injector
- oil
- supercharger
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
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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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
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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
- 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- 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
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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 pressure accumulation type bivalve electric-controlled fuel injectors, including injector head, pressure accumulation cavity wall, supercharger control valve, charged piston, injector control valve, nozzle and oil injector body.Pressure accumulation chamber is equipped in oil injector body, caused pressure oscillation in fuel injection processes can be effectively reduced, be conducive to the accurate control to oil spout, simultaneously, when the present invention is used for common rail fuel combustion system, the structure size of common rail pipe can be reduced, to reduce the requirement of the common rail pipe strength of materials, its service life and space utilization rate can be improved；The present invention can work under non pressurized and pressurization both of which, spray under no charge mode by rail pressure, realize superhigh pressure jetting under boost mode, and the flexibility that pressure ratio may be implemented is adjustable, reliability is higher, and the scope of application is wider；Injector control valve can be such that control chamber stops replenishing during draining, realize On Fluctuations oil return, improve the response speed of needle-valve, effectively improve the dynamic property and economy of diesel engine.
Description
Technical field
The present invention relates to a kind of diesel engines, specifically diesel fuel system.
Background technique
The fuel injection system that high pressure co-rail system is controlled as a kind of highly flexible is become existing with its significant advantage
For one of the main direction of development of diesel technology, the combination of electronic control technology and high pressure co-rail system makes the oil spout system of diesel engine
System can work independently of oil supply system, with emission regulation increasingly strict and diesel electric-controlled oil spout technology it is continuous into
Step, the improvement of High Pressure Common-Rail Fuel Inject is by attention.
Electric-controlled fuel injector is the core component of High Pressure Common-Rail Fuel Inject, overcomes tradition machinery formula oil spout
The problem of device fuel injection characteristic is restricted by cam face, booster-type electric-controlled fuel injector are then had both on this basis to the function of fuel pressurization
Effect.Existing booster-type electric-controlled fuel injector can further be pressurized the fuel oil in common rail pipe, fast response time and can realize
The accurate control of distributive value, but there is also some shortcomings: and booster-type electric-controlled fuel injector is easy to cause in fuel injection processes
Biggish pressure oscillation, and operating mode is more single, for the fuel injector by single solenoid valve control, once
Solenoid valve breaks down, and cisco unity malfunction is easily caused adverse consequences by entire fuel injector, the problem of functional reliability difference at
More widely applied key cannot be obtained to restrict booster-type electric-controlled fuel injector.
Summary of the invention
The purpose of the present invention is to provide fast response times, control pressure accumulation type bivalve electric-controlled fuel injector with high accuracy.
The object of the present invention is achieved like this:
Pressure accumulation type bivalve electric-controlled fuel injector of the present invention, it is characterized in that: include oil injector body, supercharger control valve, charged piston,
Injector control valve, nozzle, pressure accumulation cavity wall, supercharger control valve, charged piston are mounted in oil injector body from top to bottom, Injection Control
Valve, nozzle are sequentially arranged at from top to bottom below charged piston, and tight cap, tight cap and spray is arranged in injector control valve, the external of nozzle
Oily body is fixed together, and pressure accumulation cavity wall is mounted on above supercharger control valve, and pressure accumulation cavity wall is fixedly arranged above injector head, oil spout
Main fuel feed hole is arranged in device in front, and pressure accumulation chamber is arranged in pressure accumulation cavity wall and main in-line, pressure accumulation chamber are respectively communicated with main fuel feed hole and master
In-line；
The supercharger control valve includes supercharger control valve upper valve base, supercharger control valve conical surface valve seat, supercharger control valve plane
Valve seat, supercharger control valve return spring holder, supercharger control valve iron core, supercharger control valve armature, supercharger control valve valve rod, pressurization control
Valve upper valve base, supercharger control valve conical surface valve seat and supercharger control valve planar valve seat processed are arranged from top to bottom, and supercharger control valve resets
Spring base, supercharger control valve iron core are arranged in supercharger control valve upper valve base, and supercharger control valve valve stem top connects pressurization control
Valve armature, supercharger control valve armature are arranged in supercharger control valve conical surface valve seat, and supercharger control valve valve rod bottom end stretches to pressurization
In control valve planar valve seat, pressurization control valve coil is wound in supercharger control valve iron core, setting increases in the middle part of supercharger control valve iron core
Pressure control valve reset spring, the top of supercharger control valve reset spring are withstood on supercharger control valve return spring holder, pressurization control
The bottom end of valve reset spring is withstood on supercharger control valve armature, and setting supercharger control valve taper is convex in the middle part of supercharger control valve valve rod
It rises, forms pressurization control between the supercharger control valve valve rod above supercharger control valve tapered protrusion and supercharger control valve conical surface valve seat
Valve epicoele is formed between the supercharger control valve valve rod and supercharger control valve planar valve seat below supercharger control valve tapered protrusion and is pressurized
Control valve cavity of resorption forms pressurization draining chamber, pressurization control between supercharger control valve stem bottom and supercharger control valve planar valve seat
Supercharger control valve intermediate cavity is formed between valve tapered protrusion and supercharger control valve conical surface valve seat and supercharger control valve planar valve seat, is increased
The pressurization draining road and the draining communicated with pressurization draining road that the middle part setting of pressure control valve valve rod is communicated with pressurization draining chamber
Hole, supercharger control valve epicoele are connected to oil leak hole, supercharger control valve in-line, pressurization control are arranged in supercharger control valve planar valve seat
Valve vent line, supercharger control valve in-line are respectively communicated with supercharger control valve cavity of resorption and main in-line, supercharger control valve intermediate cavity with
Supercharger control valve vent line communicates；
The top of the charged piston is stub end, and the lower part of charged piston is small head end, stub end and the increasing above it
Form plunger shaft between pressure control valve planar valve seat, positive stop lug boss be set on oil injector body, in the middle part of stub end with positive stop lug boss it
Between form draining chamber, booster cavity is formed between small head end and oil injector body below, booster cavity is connected to booster cavity in-line, increases
Check valve is set in pressure chamber in-line, and booster cavity in-line is connected to main in-line, the pressurization that setting communicates therewith below booster cavity
Internal oil passages are arranged in chamber vent line, stub end inside, and groove is arranged in small head end, and internal oil passages are communicated with groove, in oil injector body
Charged piston is set and is connected to oil circuit, charged piston connection oil circuit is respectively communicated with groove and supercharger control valve vent line；
The injector control valve includes injector control valve upper valve base, Injection Control valve base, injector control valve reset bullet
Spring abutment, injector control valve iron core, injector control valve armature, injector control valve valve rod, injector control valve upper valve base, Injection Control
Valve base is arranged from top to bottom, and injector control valve return spring holder, injector control valve iron core are arranged in injector control valve upper valve base
In, injector control valve valve stem top connects injector control valve armature, and injector control valve armature is arranged in Injection Control valve base,
Injection Control valve coil is wound in injector control valve iron core, and injector control valve reset spring is set in the middle part of injector control valve iron core,
The top of injector control valve reset spring is withstood on injector control valve return spring holder, the bottom end top of injector control valve reset spring
On injector control valve armature, injector control valve tapered protrusion is set, injector control valve taper is convex in the middle part of injector control valve valve rod
It rises and forms injector control valve epicoele between the injector control valve valve rod and Injection Control valve base of top, injector control valve taper is convex
It rises and forms injector control valve cavity of resorption between the injector control valve valve rod and Injection Control valve base of lower section, in injector control valve valve rod
Oil spout draining road is arranged in portion, injector control valve in-line is arranged in Injection Control valve base, injector control valve in-line connects respectively
Logical injector control valve epicoele and main in-line；
The nozzle includes needle-valve limit orifice plate, needle-valve set, needle-valve, and needle-valve limit orifice plate and needle-valve set are set from top to bottom
It sets, needle-valve is mounted in needle-valve set and is formed between needle-valve set oil holding slot, and needle-valve covers end and spray orifice is arranged, and needle-valve limits orifice plate
Control chamber is formed between needle-valve set, the top of needle-valve is located in control chamber and is cased with needle valve spring, and control chamber is limited by needle-valve
Control chamber oil communication injector control valve cavity of resorption on the orifice plate of position, oil holding slot are connected to booster cavity vent line and main in-line.
The present invention may also include:
1, pressurization control valve coil no power always, it is disconnected to be connected to oil circuit with charged piston for supercharger control valve in-line at this time
It opens, high pressure fuel is divided into three parts through main in-line: first part enters under supercharger control valve through supercharger control valve in-line
Chamber；Second part enters in booster cavity from booster cavity in-line, and flows out booster cavity, fuel oil outflow by booster cavity vent line
Enter oil holding slot in-line after booster cavity, flows into oil holding slot；Part III fuel oil is through main in-line and injector control valve oil inlet
Road flows into injector control valve epicoele, and the injector control valve valve rod conical surface is opened at this time, flat seal, injector control valve epicoele and control
Chamber is finally flowed into control chamber by injector control valve cavity of resorption and control chamber oil communication, this part of fuel oil, and needle-valve is in fuel oil
It keeps taking a seat under pressure and the collective effect of needle-valve reset spring；After Injection Control valve coil is powered, injector control valve valve rod
It moves up under the action of electromagnetic force, so that plane is opened, conical surface seal, at this time under injector control valve epicoele and injector control valve
Chamber disconnects, and oil spout draining road and injector control valve cavity of resorption, control chamber oil circuit and control chamber form access, control chamber and low pressure oil
Road connection, starts draining, when the resultant force of fuel pressure and needle-valve reset spring in control chamber is less than the fuel oil pressure in oil holding slot
When power, needle-valve is lifted, and the fuel oil stored in oil holding slot is sprayed from spray orifice；After injector control valve coil blackout, in Injection Control
Under the action of valve reset spring, injector control valve valve rod resets, and plane is closed once again, and the conical surface is opened once again, and control chamber stopping is let out
Oil, high pressure fuel pass through main in-line, injector control valve in-line, injector control valve epicoele, injector control valve cavity of resorption and control
Chamber oil circuit enters control chamber, repairing is carried out to control chamber, when control chamber fuel pressure and the resultant force of needle-valve reset spring elastic force are big
When fuel pressure in oil holding slot, needle-valve is taken a seat.
2, after pressurization control valve coil is powered, supercharger control valve valve rod moves up under the action of electromagnetic force, realizes the conical surface
Sealing, plane open, at this time supercharger control valve cavity of resorption fuel oil flow into supercharger control valve intermediate cavity, supercharger control valve vent line,
Charged piston is connected to oil circuit, groove, flows into plunger shaft by internal oil passages；Charged piston moves downward, to the combustion in booster cavity
Oil is pressurized；Then, Injection Control valve coil is powered, and injector control valve valve rod moves up under the action of electromagnetic force, realizes cone
Face sealing, plane are opened, and injector control valve epicoele and injector control valve cavity of resorption disconnect, oil spout draining road and injector control valve cavity of resorption
Connection, fuel oil cannot be introduced into control chamber at this time, and the fuel oil stored before in control chamber passes through under control chamber oil circuit, injector control valve
Chamber and oil spout draining road vent, when the resultant force of control chamber fuel pressure and needle-valve reset spring elastic force is less than the combustion in oil holding slot
When oil pressure, needle-valve is lifted, and the fuel oil in oil holding slot is sprayed from spray orifice；After injector control valve coil blackout, injector control valve
Valve rod returns to initial position under the action of injector control valve reset spring, realizes that the conical surface is opened once again, flat seal, oil spout control
Valve in-line, injector control valve epicoele, injector control valve cavity of resorption, control chamber oil circuit and control chamber processed form access, and fuel oil is again
Control chamber is flowed into, repairing is carried out to control chamber, when the resultant force of fuel pressure and needle-valve reset spring elastic force in control chamber is greater than
When fuel pressure in oil holding slot, needle-valve is taken a seat, and closes spray orifice；Finally, supercharger control valve coil blackout, supercharger control valve valve rod
Initial position is replied under the action of supercharger control valve reset spring, realizes that flat seal, the conical surface are opened, plunger shaft passes through at this time
Internal oil passages, groove, charged piston connection oil circuit, supercharger control valve vent line, supercharger control valve intermediate cavity, on supercharger control valve
Chamber, oil leak hole and pressurization draining road and low pressure oil way form access, and charged piston resets under the action of hydraulic, to increase next time
Journey is pressed through to prepare.
3, the small head end groove of charged piston is two cylinder shape grooves being arranged symmetrically about charged piston center line, two
Groove is set between a cylinder shape groove and is connected to oil circuit.
Present invention has an advantage that pressure accumulation type bivalve electric-controlled fuel injector of the invention, the pressure accumulation being arranged in oil injector body
Pressure oscillation caused by chamber can effectively reduce fuel system during the work time；Pressure accumulation type bivalve electric-controlled fuel injector of the invention
It can work under non pressurized and pressurization both of which, rail pressure injection can be achieved under no charge mode, can be achieved under boost mode
Superhigh pressure jetting, and the flexibility that pressure ratio may be implemented is adjustable；Pressurization and oil spout are controlled respectively using two solenoid valves
Process, reliability are higher；Injector control valve can make control chamber not oil inlet during oil return, realize On Fluctuations oil return, significantly
Recirculating oil quantity is reduced, the response speed of needle-valve is improved, is conducive to the hydraulic efficiency for improving high-pressure common-rail fuel system.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is supercharger control valve schematic diagram；
Fig. 3 is charged piston schematic diagram；
Fig. 4 is injector control valve schematic diagram；
Fig. 5 is nozzle segment 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, pressure accumulation type bivalve electric-controlled fuel injector of the invention, including injector head 1, pressure accumulation chamber 2, pressurization control
Valve 3, charged piston 4, injector control valve 5, nozzle 6, tight cap 7 and oil injector body 8, injector head 1 are mounted on oil injector body 8,
It is provided with pressure accumulation chamber 2 in oil injector body 8, main fuel feed hole 10 is provided on injector head 1, main fuel feed hole 10 is communicated with 2 upper end of pressure accumulation chamber,
2 lower end of pressure accumulation chamber is connected to main in-line 9, supercharger control valve 3, charged piston 4, injector control valve 5 and nozzle 6 from top to bottom according to
Secondary to be mounted in oil injector body, tight cap 7 is tightened together by screw thread with oil injector body 8.
Supercharger control valve 3 is mounted in oil injector body 8, and supercharger control valve 3 includes supercharger control valve return spring holder 11, increases
Pressure control valve iron core 12, supercharger control valve armature 13, supercharger control valve armature chamber 14, supercharger control valve conical surface valve seat 15, pressurization
Control valve valve rod 16, supercharger control valve planar valve seat 18, pressurization control valve coil 26, pressurization control valve coil sealant 27 and increasing
Pressure control valve reset spring 28.Supercharger control valve valve rod 16 and supercharger control valve planar valve seat 18 and supercharger control valve conical surface valve seat
Supercharger control valve epicoele 17, supercharger control valve intermediate cavity 24, supercharger control valve cavity of resorption 22 and pressurization draining are respectively formed between 15
Chamber 20, oil leak hole 25 and pressurization draining road 21 are provided on supercharger control valve valve rod 16, and supercharger control valve epicoele 17 passes through oil leak hole
25, pressurization draining road 21 is connected to low pressure oil way；Supercharger control valve intermediate cavity 24 is connected to supercharger control valve vent line 19；Pressurization
Control valve cavity of resorption 22 is connected to by supercharger control valve in-line 23 with main in-line 9；It is pressurized draining chamber 20 and pressurization draining road 21
Connection.
Charged piston 4 is mounted on 3 lower part of supercharger control valve, and 4 stub end of charged piston is equipped with positive stop lug boss, and small head end is provided with
Groove 37 is equipped with internal oil passages 38 inside charged piston 4 and is connected to oil circuit 32 with groove.It is equipped with plunger shaft 29 in oil injector body 8, lets out
Oil pocket 30 and booster cavity 36, main in-line 9 are connected to by booster cavity in-line 35 with booster cavity 36, are set in booster cavity in-line 35
There is check valve 34, is equipped with booster cavity vent line 33 in 36 lower end of booster cavity, charged piston connection oil circuit 31 is protected always with groove 37
Connection is held, and is connected to oil circuit 32, internal oil passages 38 and plunger shaft 29 with groove and forms access.
Injector control valve 5 is mounted on 4 lower end of charged piston, injector control valve 5 include injector control valve return spring holder 39,
Injector control valve iron core 40, injector control valve armature 41, Injection Control valve base 42, injector control valve valve rod 43, Injection Control
Valve armature chamber 48, Injection Control valve coil 49, Injection Control valve coil sealant 50 and injector control valve reset spring 51.Oil spout
Injector control valve epicoele 46 and injector control valve cavity of resorption 44 are respectively formed between control valve valve rod 43 and Injection Control valve base 42,
It is provided with oil spout draining road 47 on injector control valve valve rod 43, is connected to low pressure oil way；Injector control valve epicoele 46 passes through oil spout control
Valve in-line 45 processed is connected to main in-line 9.
Nozzle 6 is mounted on the end of oil injector body 8, and nozzle 6 includes control chamber 53, oil holding slot 54, spray orifice 55,56 and of needle-valve
Needle-valve reset spring 57.Control chamber 53 and oil holding slot 54 are provided in oil injector body 8, control chamber 53 is connected to control chamber oil circuit 58；
Needle-valve reset spring 57 is mounted in control chamber 53, and the top of needle-valve 56 is placed in needle-valve reset spring 57；Oil holding slot 54 and Sheng
Oil groove in-line 52 is connected to；6 end of nozzle is provided with spray orifice 55.
Injector head 1 is fixed on oil injector body 8, and supercharger control valve 3, charged piston 4, injector control valve 5 and nozzle 6 divide
It is not mounted in oil injector body 8, is threadedly coupled between tight cap 7 and oil injector body 8.Main fuel feed hole 10 is provided on injector head 1,
Be provided with pressure accumulation chamber 2 in oil injector body 8, pressure accumulation chamber 2 be connected to by main fuel feed hole 10 with common rail pipe, 2 lower end of pressure accumulation chamber equipped with lead into
Oil circuit 9.Shape is distinguished between supercharger control valve valve rod 16 and supercharger control valve conical surface valve seat 15 and supercharger control valve planar valve seat 18
At supercharger control valve epicoele 17, supercharger control valve intermediate cavity 24, supercharger control valve cavity of resorption 22 and pressurization draining chamber 20, main in-line
9 are connected to by supercharger control valve in-line 23 with supercharger control valve cavity of resorption 22；It is pressurized draining chamber 20 and passes through supercharger control valve valve rod
Pressurization draining road 21 on 16 is connected to low pressure oil way；The oil leak hole 25 being provided on supercharger control valve valve rod 16 is by supercharger control valve
Epicoele 17 and pressurization draining road 21 are connected together.Charged piston 4 is mounted on the lower part of supercharger control valve 3, sets in oil injector body 8
There are plunger shaft 29, draining chamber 30 and booster cavity 36, booster cavity in-line 35, pressurization are equipped between main in-line 9 and booster cavity 36
Check valve 34 is equipped in chamber in-line 35；On supercharger control valve vent line 19, charged piston connection oil circuit 31 and charged piston 4
Groove 37 is connected to；It is provided with internal oil passages 38 on charged piston 4 and is connected to oil circuit 32 with groove, plunger shaft 29 has been connected to groove 37
Come；Draining chamber 30 is connected to low pressure oil way.Injector control valve 5 is mounted on the lower end of charged piston 4, injector control valve valve rod 43 with
Injector control valve epicoele 46 and injector control valve cavity of resorption 44 are respectively formed between Injection Control valve base 42, main in-line 9 passes through
Injector control valve in-line 45 is connected to injector control valve epicoele 46；Oil spout draining road 47 is provided on injector control valve valve rod 43,
It is connected to low pressure oil way.Nozzle 6 is mounted on the end of oil injector body 8, and control chamber 53 and oil holding slot 54 are provided in oil injector body 8,
Control chamber 53 is connected to by control chamber oil circuit 58 with injector control valve cavity of resorption 44, and needle-valve reset spring 57 is mounted on control chamber 53
Interior, the top of needle-valve 56 is placed in needle-valve reset spring 57, and the rest part of needle-valve 56 is located in nozzle 6；Oil holding slot 54 and increasing
Pressure chamber 36 is connected to by oil holding slot in-line 52 with booster cavity vent line 33；6 end of nozzle is provided with spray orifice 55.
Supercharger control valve 3 is by supercharger control valve return spring holder 11, supercharger control valve iron core 12, supercharger control valve armature
13, supercharger control valve armature chamber 14, supercharger control valve conical surface valve seat 15, supercharger control valve valve rod 16, supercharger control valve flat valve
Seat 18, pressurization control valve coil 26, pressurization control valve coil sealant 27 and supercharger control valve reset spring 28 form, such as Fig. 2
It is shown.Supercharger control valve armature 13 is fixed on supercharger control valve valve rod 16, is mounted in supercharger control valve armature chamber 14；Pressurization
28 one end of control valve reset spring is mounted on supercharger control valve return spring holder 11, and the other end is mounted on supercharger control valve valve rod
On 16；Supercharger control valve valve rod 16 is fallen in supercharger control valve planar valve seat 18, with supercharger control valve conical surface valve seat 15 and pressurization
Supercharger control valve epicoele 17, supercharger control valve intermediate cavity 24, supercharger control valve cavity of resorption 22 are formed between control valve planar valve seat 18
With pressurization draining chamber 20, when initial position, supercharger control valve epicoele 17 is connected to supercharger control valve intermediate cavity 24, supercharger control valve
Oil leak hole 25 and pressurization draining road 21 are provided on valve rod 16；Supercharger control valve epicoele 17 passes through pressurization draining road 21 and oil leak hole 25
It is connected to low pressure oil way, supercharger control valve intermediate cavity 24 is connected to the holding of supercharger control valve vent line 19, main in-line 9, pressurization
Control valve in-line 23 is connected to supercharger control valve cavity of resorption 22, and pressurization draining chamber 20 is connected by pressurization draining road 21 and low pressure oil way
Logical, its role is to collect the fuel oil leaked in 16 moving process of supercharger control valve valve rod and be offloaded to low pressure oil way.
4 liang of end cross-sectional area differences of charged piston, 4 stub end of charged piston are provided with positive stop lug boss；It closes 4 lower end of charged piston
Two cylinder shape grooves 37 are arranged symmetrically in piston centreline, setting groove is connected to oil circuit 32 among two grooves 37, and two recessed
Slot 37 is connected to oil circuit 32 by groove and is connected to；Internal oil passages 38 are provided at 4 center of charged piston, and internal oil passages 38 are from piston major part
Center starts to squeeze into, until being connected to oil circuit 32 with groove and being connected to；Plunger shaft 29,30 and of draining chamber are equipped in oil injector body 8
Booster cavity 36, charged piston 4 are mounted in oil injector body 8, as shown in Figure 3.36 lower end of booster cavity is equipped with booster cavity in-line 35
With booster cavity vent line 33, main in-line 9 is connected to by booster cavity in-line 35 with booster cavity 36, is set in booster cavity in-line 35
There is check valve 34, charged piston connection oil circuit 31 is connected to groove 37, and fuel oil can be connected to oil circuit 31, groove by charged piston
37, groove connection oil circuit 32 and internal oil passages 38 flow into plunger shaft 29, and when charged piston 4 comes downwards to extreme position, pressurization
Piston connection oil circuit 31 is still maintained to be connected to groove 37, so that ensure that in pressurization has always fuel oil to flow into plunger shaft 29
It is interior.Draining chamber 30 is connected to low pressure oil way, on the one hand can be unloaded the fuel oil leaked in 4 moving process of charged piston in time,
On the other hand position-limiting action can also be played to charged piston 4.
Injector control valve 5 is by injector control valve return spring holder 39, injector control valve iron core 40, injector control valve armature
41, Injection Control valve base 42, injector control valve valve rod 43, injector control valve armature chamber 48, Injection Control valve coil 49, oil spout
It controls valve coil sealant 50 and injector control valve reset spring 51 forms, as shown in Figure 4.Injector control valve armature 41 is fixed on
On injector control valve valve rod 43, it is mounted in injector control valve armature chamber 48；51 one end of injector control valve reset spring is mounted on
On injector control valve return spring holder 39, the other end is mounted on injector control valve valve rod 43, and injector control valve valve rod 43 is tight
It is pressed on Injection Control valve base 42；It is formed on injector control valve between injector control valve valve rod 43 and Injection Control valve base 42
Chamber 46 and injector control valve cavity of resorption 44, injector control valve epicoele 46 are connected to by injector control valve in-line 45 with main in-line 9,
43 flat seal of injector control valve valve rod when initial position, injector control valve epicoele 46 are connected to injector control valve cavity of resorption 44；Spray
It is provided with oil spout draining road 47 on oil control valve valve rod 43, is connected to low pressure oil way.
Nozzle 6 mainly includes control chamber 53, oil holding slot 54, spray orifice 55, needle-valve 56 and needle-valve reset spring 57.Oil injector body
Oil holding slot 54 is equipped in 8, fuel oil is flowed into oil holding slot 54 by oil holding slot in-line 52；53 top of control chamber is equipped with control chamber oil
Road 58, needle-valve reset spring 57 are mounted in control chamber 53；The top of needle-valve 56 covers in needle-valve reset spring 57, rest part
In nozzle 6；6 end of nozzle is provided with spray orifice 55, and when initial position, needle-valve 56 is taken a seat, and spray orifice 55 is closed, as shown in Figure 5.Control
The resultant force of fuel pressure and needle-valve reset spring 57 in chamber 53 processed will determine needle-valve 56 with the fuel pressure in oil holding slot 54
It lifts and takes a seat, and then control the connection or disconnection of oil holding slot 54 and spray orifice 55.
Pressure accumulation type bivalve electric-controlled fuel injector of the invention can work under non pressurized and pressurization both of which.
The course of work of pressure accumulation type bivalve electric-controlled fuel injector of the invention under no charge mode is as follows: supercharger control valve line
26 no power always of circle, supercharger control valve in-line 23 is connected to oil circuit 31 with charged piston and disconnects at this time, the high pressure in common rail pipe
Fuel oil can flow into pressure accumulation chamber 2 from main fuel feed hole 10, then be divided into three parts through main in-line 9, first part is through pressurization control
Valve in-line 23 enters supercharger control valve cavity of resorption 22, is stored in supercharger control valve cavity of resorption 22；Second part is from booster cavity oil inlet
Road 35 enters in booster cavity 36, and flows out booster cavity 36 by booster cavity vent line 33, enters after fuel oil outflow booster cavity 36
Oil holding slot in-line 52 finally flows into oil holding slot 54；Part III fuel oil is through main in-line 9 and injector control valve in-line 45
Injector control valve epicoele 46 is flowed into, since 43 conical surface of injector control valve valve rod is opened at this time, flat seal, so injector control valve
Epicoele 46 is connected to control chamber 53 by injector control valve cavity of resorption 44 and control chamber oil circuit 58, therefore this part of fuel oil is eventually
It flows into control chamber 53, needle-valve 56 keeps taking a seat under the collective effect of fuel pressure and needle-valve reset spring 57, and fuel injector is not
Work.After Injection Control valve coil 49 is powered, injector control valve valve rod 43 moves up under the action of electromagnetic force, to make plane
It opens, conical surface seal, injector control valve epicoele 46 and injector control valve cavity of resorption 44 disconnect at this time, and the fuel oil from common rail pipe will not
It can enter in control chamber 53, due to being provided with oil spout draining road 47 on injector control valve valve rod 43, so when plane is opened, oil spout
Draining road 47 can and injector control valve cavity of resorption 44, control chamber oil circuit 58 and control chamber 53 formed access, then control chamber 53 with
The connection of low pressure oil duct, starts draining, with the progress of draining process, the fuel pressure in control chamber 53 can be gradually reduced, and work as control
When the resultant force of fuel pressure and needle-valve reset spring 57 in chamber 53 processed is less than the fuel pressure in oil holding slot 54, needle-valve 56 will
It lifts, the fuel oil stored in oil holding slot 54 can be sprayed from spray orifice 55, commencement of fuel injection.Because there is no high compression ignition during draining
Oil enters in control chamber 53, realizes On Fluctuations oil return, so the pressure in control chamber 53 can decline rapidly, thus needle-valve 56
It can quickly lift, this advantage for making the present invention have response fast, in addition, the oil spout draining road on injector control valve valve rod 43
47 can play cooling effect to solenoid valve during draining；It is multiple in injector control valve after Injection Control valve coil 49 powers off
Under the action of the spring 51 of position, injector control valve valve rod 43 resets, and plane is closed once again, and the conical surface is opened once again, and control chamber 53 stops
Draining, the high pressure fuel in common rail pipe pass through main in-line 9, injector control valve in-line 45, injector control valve epicoele 46, oil spout
Control valve cavity of resorption 44 and control chamber oil circuit 58 enter control chamber 53, carry out repairing to control chamber 53, with the progress of oil replenishing process,
Fuel pressure in control chamber 53 gradually rises, when the resultant force of fuel pressure and 57 elastic force of needle-valve reset spring is greater than oil holding slot 54
When interior fuel pressure, needle-valve 56 is taken a seat, and injection process terminates.
The course of work of pressure accumulation type bivalve electric-controlled fuel injector of the invention under boost mode is as follows: the high pressure in common rail pipe
Fuel oil can flow into pressure accumulation chamber 2 from main fuel feed hole 10, and then main in-line 9 is divided into three parts, and first part is through supercharger control valve
In-line 23 enters supercharger control valve cavity of resorption 22, is stored in supercharger control valve cavity of resorption 22；Second part is from booster cavity in-line
35 enter in booster cavity 36, and flow out booster cavity 36 by booster cavity vent line 33, and fuel oil enters Sheng after flowing out booster cavity 36
Oil groove in-line 52 finally flows into oil holding slot 54；Part III fuel oil is flowed through main in-line 9 and injector control valve in-line 45
Enter injector control valve epicoele 46, since 43 conical surface of injector control valve valve rod is opened at this time, flat seal, so on injector control valve
Chamber 46 is connected to control chamber 53 by injector control valve cavity of resorption 44 and control chamber oil circuit 58, therefore this part of fuel oil eventually flows
Enter in control chamber 53, needle-valve 56 keeps taking a seat under the collective effect of fuel pressure and needle-valve reset spring 57, fuel injector not work
Make.After pressurization control valve coil 26 is powered, supercharger control valve valve rod 16 can move up under the action of electromagnetic force, realize that the conical surface is close
Envelope, plane are opened, and the fuel oil of supercharger control valve cavity of resorption 22 will flow into supercharger control valve intermediate cavity 24 at this time, supercharger control valve goes out
Oil circuit 19, charged piston connection oil circuit 31, groove 37, groove are connected to oil circuit 32, flow into plunger shaft eventually by internal oil passages 38
29；The high pressure fuel being filled in plunger shaft 29 and booster cavity 36 in common rail pipe at this time, but due to the major part of charged piston 4
There are difference in areas with microcephaly, therefore will form pressure difference at 4 both ends of charged piston, and then charged piston 4 is just in this pressure
It is moved downward under the action of difference, the fuel oil in booster cavity 36 is pressurized.Check valve 34 is equipped in booster cavity in-line 35, it can
To prevent pressurized super-pressure fuel flow returns into common rail pipe, so super-pressure fuel oil can only be flowed by booster cavity vent line 33
Booster cavity 36 out, and flowed into oil holding slot 54 through oil holding slot in-line 52, the oil pressure in oil holding slot 54 is higher than control chamber at this time
Oil pressure in 53, but since there is biggish difference in areas for oil holding slot 54 and control chamber 53, add needle-valve reset spring 57
Effect, so needle-valve 56 can't lift；Then, Injection Control valve coil 49 is powered, and injector control valve valve rod 43 can be in electricity
It is moved up under the action of magnetic force, realizes conical surface seal, plane is opened, and injector control valve epicoele 46 and injector control valve cavity of resorption 44 are disconnected
It opens, oil spout draining road 47 is connected to injector control valve cavity of resorption 44, and the fuel oil in common rail pipe cannot be introduced into control chamber 53 at this time, control
The fuel oil stored before in chamber 53 will be vented by control chamber oil circuit 58, injector control valve cavity of resorption 44 and oil spout draining road 47,
With the progress of draining process, the pressure in control chamber 53 is gradually reduced, when 53 fuel pressure of control chamber and needle-valve reset bullet
When the resultant force of 57 elastic force of spring is less than the fuel pressure in oil holding slot 54, needle-valve 56 will be lifted, and the fuel oil in oil holding slot 54 can be from
Spray orifice 55 sprays, and injection process starts；Because oil spout draining road 47 is provided on injector control valve valve rod 43, in control chamber 53
Fuel oil is had during draining and flows through injector control valve valve rod 43, this can play cooling effect to injector control valve 5.When oil spout control
After valve coil 49 processed powers off, injector control valve valve rod 43 can return to initial bit under the action of injector control valve reset spring 51
It sets, realizes that the conical surface is opened once again, flat seal, common rail pipe, injector control valve in-line 45, injector control valve epicoele 46, oil spout
Control valve cavity of resorption 44, control chamber oil circuit 58 and control chamber 53 form access, and the fuel oil in common rail pipe can again flow into control chamber 53,
Repairing is carried out to control chamber 53, when the resultant force of 57 elastic force of fuel pressure and needle-valve reset spring in control chamber 53 is greater than oil holding slot
When fuel pressure in 54, needle-valve 56 is taken a seat, and closes spray orifice 55, terminates oil spout.Finally, pressurization control valve coil 26 powers off, increase
Pressure control valve valve rod 16 can reply initial position under the action of supercharger control valve reset spring 28, realize flat seal, the conical surface
It opens, plunger shaft 29 is connected to oil circuit 32, groove 37, charged piston by internal oil passages 38, groove and is connected to oil circuit 31, pressurization at this time
Control valve vent line 19, supercharger control valve intermediate cavity 24, supercharger control valve epicoele 17, oil leak hole 25 and pressurization draining road 21 with it is low
Pressure oil road forms access, therefore the fuel oil in plunger shaft 29 can leak into low pressure oil way, due to store always in booster cavity 36
High pressure fuel in common rail pipe is prepared so charged piston 4 can reset under the action of hydraulic for pressurization next time.
Pressurization draining road 21 is flowed through due to having fuel oil during 29 draining of plunger shaft, so cooling work can be played to supercharger control valve 3
With.Charged piston connection oil circuit 31 can be remained with groove 37 during 4 downlink of charged piston to be connected to, so if increasing
There is electric current to pass through always in pressure control valve coil 26, federation is full of fuel oil in plunger shaft 29, and when charged piston 4 reaches maximum
Maximum boost ratio can be obtained when displacement, once and the power-off of pressurization control valve coil 26, charged piston 4 will reset rapidly, sound
Answer speed quickly, therefore can be adjustable come the flexibility for realizing pressure ratio by changing the control strategy of control supercharger control valve 3.
Claims (5)
1. pressure accumulation type bivalve electric-controlled fuel injector, it is characterized in that: including oil injector body, supercharger control valve, charged piston, Injection Control
Valve, nozzle, pressure accumulation cavity wall, supercharger control valve, charged piston are mounted in oil injector body from top to bottom, injector control valve, nozzle
It is sequentially arranged at below charged piston from top to bottom, tight cap is arranged in injector control valve, the external of nozzle, and tight cap and oil injector body are solid
It is scheduled on together, pressure accumulation cavity wall is mounted on above supercharger control valve, and pressure accumulation cavity wall is fixedly arranged above injector head, sets in injector head
Main fuel feed hole is set, pressure accumulation chamber is set in pressure accumulation cavity wall and main in-line, pressure accumulation chamber are respectively communicated with main fuel feed hole and main in-line；
The supercharger control valve include supercharger control valve upper valve base, supercharger control valve conical surface valve seat, supercharger control valve planar valve seat,
Supercharger control valve return spring holder, supercharger control valve iron core, supercharger control valve armature, supercharger control valve valve rod, supercharger control valve
Upper valve base, supercharger control valve conical surface valve seat and supercharger control valve planar valve seat are arranged from top to bottom, supercharger control valve reset spring
Seat, supercharger control valve iron core are arranged in supercharger control valve upper valve base, and supercharger control valve valve stem top connects supercharger control valve rank
Iron, supercharger control valve armature are arranged in supercharger control valve conical surface valve seat, and supercharger control valve valve rod bottom end stretches to pressurization control
In valve planar valve seat, pressurization control valve coil is wound in supercharger control valve iron core, setting pressurization control in the middle part of supercharger control valve iron core
Valve reset spring processed, the top of supercharger control valve reset spring are withstood on supercharger control valve return spring holder, and supercharger control valve is multiple
The bottom end of position spring is withstood on supercharger control valve armature, and supercharger control valve tapered protrusion is arranged in the middle part of supercharger control valve valve rod, is increased
It is formed on supercharger control valve between supercharger control valve valve rod above pressure control valve tapered protrusion and supercharger control valve conical surface valve seat
Chamber forms pressurization control between the supercharger control valve valve rod and supercharger control valve planar valve seat below supercharger control valve tapered protrusion
Valve cavity of resorption forms pressurization draining chamber, pressurization control valve cone between supercharger control valve stem bottom and supercharger control valve planar valve seat
Supercharger control valve intermediate cavity, pressurization control are formed between shape protrusion and supercharger control valve conical surface valve seat and supercharger control valve planar valve seat
The pressurization draining road and the oil leak hole communicated with pressurization draining road that the middle part setting of valve valve rod processed is communicated with pressurization draining chamber, increase
Pressure control valve epicoele is connected to oil leak hole, supercharger control valve in-line is arranged in supercharger control valve planar valve seat, supercharger control valve goes out
Oil circuit, supercharger control valve in-line are respectively communicated with supercharger control valve cavity of resorption and main in-line, supercharger control valve intermediate cavity and pressurization
Control valve vent line communicates；
The top of the charged piston is stub end, and the lower part of charged piston is small head end, stub end and the pressurization control above it
Plunger shaft is formed between valve planar valve seat processed, and positive stop lug boss, shape between stub end middle part and positive stop lug boss are set on oil injector body
At draining chamber, booster cavity is formed between small head end and oil injector body below, booster cavity is connected to booster cavity in-line, booster cavity
Check valve is set in in-line, and booster cavity in-line is connected to main in-line, and the booster cavity that setting communicates therewith below booster cavity goes out
Internal oil passages are arranged in oil circuit, stub end inside, and groove is arranged in small head end, and internal oil passages communicate with groove, are arranged in oil injector body
Charged piston is connected to oil circuit, and charged piston connection oil circuit is respectively communicated with groove and supercharger control valve vent line；
The injector control valve include injector control valve upper valve base, Injection Control valve base, injector control valve return spring holder,
Injector control valve iron core, injector control valve armature, injector control valve valve rod, injector control valve upper valve base, injector control valve valve
Seat is arranged from top to bottom, and injector control valve return spring holder, injector control valve iron core are arranged in injector control valve upper valve base, spray
Oil control valve valve stem top connects injector control valve armature, and injector control valve armature is arranged in Injection Control valve base, oil spout
Injection Control valve coil is wound in control valve iron core, and injector control valve reset spring, oil spout are set in the middle part of injector control valve iron core
The top of control valve reset spring is withstood on injector control valve return spring holder, and the bottom end of injector control valve reset spring withstands on spray
On oil control valve armature, injector control valve tapered protrusion is set, in injector control valve tapered protrusion in the middle part of injector control valve valve rod
Injector control valve epicoele is formed between the injector control valve valve rod and Injection Control valve base of side, under injector control valve tapered protrusion
Injector control valve cavity of resorption is formed between the injector control valve valve rod and Injection Control valve base of side, is set in the middle part of injector control valve valve rod
Oil spout draining road is set, injector control valve in-line is set in Injection Control valve base, injector control valve in-line is respectively communicated with spray
Oil control valve epicoele and main in-line；
The nozzle includes needle-valve limit orifice plate, needle-valve set, needle-valve, and needle-valve limit orifice plate and needle-valve set are arranged from top to bottom, needle
Valve is mounted in needle-valve set and is formed between needle-valve set oil holding slot, and needle-valve covers end and spray orifice is arranged, and needle-valve limits orifice plate and needle
Control chamber is formed between valve pocket, the top of needle-valve is located in control chamber and is cased with needle valve spring, and control chamber passes through needle-valve limit hole
Control chamber oil communication injector control valve cavity of resorption on plate, oil holding slot are connected to booster cavity vent line and main in-line.
2. pressure accumulation type bivalve electric-controlled fuel injector according to claim 1, it is characterized in that: under no charge mode: pressurization control
Valve coil no power always, supercharger control valve in-line is connected to oil circuit disconnection with charged piston at this time, and high pressure fuel is through main oil inlet
Road is divided into three parts: first part enters supercharger control valve cavity of resorption through supercharger control valve in-line；Second part is from booster cavity
In-line enters in booster cavity, and flows out booster cavity by booster cavity vent line, and fuel oil enters oil holding slot after flowing out booster cavity
In-line flows into oil holding slot；Part III fuel oil flows on injector control valve through main in-line and injector control valve in-line
Chamber, the injector control valve valve rod conical surface is opened at this time, flat seal, and injector control valve epicoele and control chamber pass through under injector control valve
Chamber and control chamber oil communication, this part of fuel oil finally flow into control chamber, and needle-valve is in fuel pressure and needle-valve reset spring
Collective effect under keep taking a seat；When Injection Control valve coil be powered after, injector control valve valve rod under the action of electromagnetic force on
It moves, so that plane be made to open, conical surface seal, injector control valve epicoele and injector control valve cavity of resorption are disconnected at this time, oil spout draining road
Access is formed with injector control valve cavity of resorption, control chamber oil circuit and control chamber, control chamber is connected to low pressure oil duct, start draining,
When the resultant force of fuel pressure and needle-valve reset spring in control chamber is less than the fuel pressure in oil holding slot, needle-valve is lifted, and contains
The fuel oil stored in oil groove is sprayed from spray orifice；After injector control valve coil blackout, in the effect of injector control valve reset spring
Under, injector control valve valve rod resets, and plane is closed once again, and the conical surface is opened once again, and control chamber stops draining, and high pressure fuel passes through master
In-line, injector control valve in-line, injector control valve epicoele, injector control valve cavity of resorption and control chamber oil circuit enter control chamber,
Repairing is carried out to control chamber, when the resultant force of control chamber fuel pressure and needle-valve reset spring elastic force is greater than the fuel oil pressure in oil holding slot
When power, needle-valve is taken a seat.
3. pressure accumulation type bivalve electric-controlled fuel injector according to claim 1 or 2, it is characterized in that: under boost mode: when pressurization is controlled
After valve coil processed is powered, supercharger control valve valve rod moves up under the action of electromagnetic force, realizes conical surface seal, and plane is opened, at this time
The fuel oil of supercharger control valve cavity of resorption flows into supercharger control valve intermediate cavity, supercharger control valve vent line, charged piston connection oil circuit, recessed
Slot flows into plunger shaft by internal oil passages；Charged piston moves downward, and is pressurized to the fuel oil in booster cavity；Then, oil spout
It controls valve coil to be powered, injector control valve valve rod moves up under the action of electromagnetic force, realizes conical surface seal, and plane is opened, oil spout
Control valve epicoele and injector control valve cavity of resorption disconnect, and oil spout draining road is connected to injector control valve cavity of resorption, and fuel oil can not be at this time
Entering control chamber, the fuel oil stored before in control chamber is vented by control chamber oil circuit, injector control valve cavity of resorption and oil spout draining road,
When the resultant force of control chamber fuel pressure and needle-valve reset spring elastic force is less than the fuel pressure in oil holding slot, needle-valve is lifted,
Fuel oil in oil holding slot is sprayed from spray orifice；After injector control valve coil blackout, injector control valve valve rod is multiple in injector control valve
Initial position is returned under the action of the spring of position, realizes that the conical surface is opened once again, flat seal, injector control valve in-line, oil spout control
Valve epicoele, injector control valve cavity of resorption, control chamber oil circuit and control chamber processed form access, and fuel oil again flows into control chamber, to control
Chamber carries out repairing, when the resultant force of fuel pressure and needle-valve reset spring elastic force in control chamber is greater than the fuel pressure in oil holding slot
When, needle-valve is taken a seat, and spray orifice is closed；Finally, supercharger control valve coil blackout, supercharger control valve valve rod resets bullet in supercharger control valve
Initial position is replied under the action of spring, realizes that flat seal, the conical surface are opened, plunger shaft passes through internal oil passages, groove, pressurization at this time
Piston connection oil circuit, supercharger control valve vent line, supercharger control valve intermediate cavity, supercharger control valve epicoele, oil leak hole and pressurization are let out
Oil circuit and low pressure oil way form access, and charged piston resets under the action of hydraulic, prepare for pressurization next time.
4. pressure accumulation type bivalve electric-controlled fuel injector according to claim 1 or 2, it is characterized in that: the small head end of charged piston is recessed
Slot is two cylinder shape grooves being arranged symmetrically about charged piston center line, and setting groove is connected between two cylinder shape grooves
Oil circuit.
5. pressure accumulation type bivalve electric-controlled fuel injector according to claim 3, it is characterized in that: the small head end groove of charged piston is
About two cylinder shape grooves that charged piston center line is arranged symmetrically, setting groove is connected to oil between two cylinder shape grooves
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835570.0A CN109236526A (en) | 2018-07-26 | 2018-07-26 | Pressure accumulation type bivalve electric-controlled fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835570.0A CN109236526A (en) | 2018-07-26 | 2018-07-26 | Pressure accumulation type bivalve electric-controlled fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109236526A true CN109236526A (en) | 2019-01-18 |
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ID=65072546
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810835570.0A Withdrawn CN109236526A (en) | 2018-07-26 | 2018-07-26 | Pressure accumulation type bivalve electric-controlled fuel injector |
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| Country | Link |
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| CN (1) | CN109236526A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217662A (en) * | 2022-06-23 | 2022-10-21 | 北京理工大学 | Double-valve oil injection system of diesel engine and low-rotation-speed high-pressure oil injection control method |
| CN115355121A (en) * | 2022-09-01 | 2022-11-18 | 哈尔滨工程大学 | Low-oil return rate supercharged electric control oil injector with variable oil injection rule |
| US11713740B1 (en) * | 2022-02-24 | 2023-08-01 | Harbin Engineering University | High-pressure common rail fuel injector capable of achieving highly stable injection based on throttling damping accommodating effect |
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| 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 |
| 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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2018
- 2018-07-26 CN CN201810835570.0A patent/CN109236526A/en not_active Withdrawn
Patent Citations (4)
| 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 |
| 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11713740B1 (en) * | 2022-02-24 | 2023-08-01 | Harbin Engineering University | High-pressure common rail fuel injector capable of achieving highly stable injection based on throttling damping accommodating effect |
| CN115217662A (en) * | 2022-06-23 | 2022-10-21 | 北京理工大学 | Double-valve oil injection system of diesel engine and low-rotation-speed high-pressure oil injection control method |
| CN115217662B (en) * | 2022-06-23 | 2023-12-05 | 北京理工大学 | Double-valve oil injection system of diesel engine and low-rotation-speed high-pressure oil injection control method |
| CN115355121A (en) * | 2022-09-01 | 2022-11-18 | 哈尔滨工程大学 | Low-oil return rate supercharged electric control oil injector with variable oil injection rule |
| CN115355121B (en) * | 2022-09-01 | 2023-12-12 | 哈尔滨工程大学 | Low oil return quantity booster type variable oil injection rule electric control oil sprayer |
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Application publication date: 20190118 |