CN109209709A - Electric control fuel oil jet system with fluid power compensating piston - Google Patents
Electric control fuel oil jet system with fluid power compensating piston Download PDFInfo
- Publication number
- CN109209709A CN109209709A CN201810835537.8A CN201810835537A CN109209709A CN 109209709 A CN109209709 A CN 109209709A CN 201810835537 A CN201810835537 A CN 201810835537A CN 109209709 A CN109209709 A CN 109209709A
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- China
- Prior art keywords
- control valve
- valve
- oil
- injector
- 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
- 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
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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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- 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 the electric control fuel oil jet systems with fluid power compensating piston, including electric-controlled fuel injector, fuel tank, low pressure oil way, low pressure oil transfer pump, high-pressure oil pump and common rail pipe.The electric-controlled fuel injector phase of the present invention controls pressurization respectively using dual-coil electromagnetic valve and injection process restricts the injection process of fuel injector by pressurization, thus the present invention can work under non pressurized and pressurization both of which, rail pressure injection is carried out under no charge mode, superhigh pressure jetting is carried out under boost mode, and it can realize that the flexibility of pressure ratio is adjustable under boost mode by changing the control strategy of electric-controlled fuel injector, its reliability is higher, and the scope of application is wider.Fluid power compensating piston makes the present invention that the fuel injection characteristic for first delaying rear urgency may be implemented, and has the advantages that oil-break is clear-cut, effectively improves 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
Diesel engine has many advantages, such as that the thermal efficiency is high, power bracket is wide, starting is rapid, the safe and reliable and service life is long, thus
Extremely wide application is arrived, especially in terms of ship, diesel engine is led as the host for pushing ship's navigation in ship power
Occupy dominant position in domain, it is the heart of ship.However, marine diesel has, structure is complicated, noise is big, fuselage vibration is violent
The defects of, it is properly settled in addition, being also not yet received the problems such as exhaust emission.
Diesel fuel injection system is the core component of diesel engine, and the quality of diesel engine combustion quality is largely
The upper performance depending on fuel injection system.The guideline for organizing diesel engine ideal combustion process is to inhibit initiation combustion, is added
Fast mid-term burning, reduction after-burning, high after wanting first low this requires the injection rate of electric-controlled fuel injector, end oil spout is quick, oil spout
Duration is moderate, but for existing electric control fuel oil jet system, realizes that above-mentioned course of injection can greatly increase control
Difficulty.
Summary of the invention
The purpose of the present invention is to provide can superhigh pressure jetting the electric control fuel oil jet system with fluid power compensating piston.
The object of the present invention is achieved like this:
Electric control fuel oil jet system of the present invention with fluid power compensating piston, it is characterized in that: include electric-controlled fuel injector, fuel tank,
Common rail pipe；
The electric-controlled fuel injector includes oil injector body, supercharger control valve, charged piston, injector control valve, nozzle, pressurization control
Valve processed, charged piston are mounted in oil injector body from top to bottom, and injector control valve, nozzle are sequentially arranged at pressurization from top to bottom and live
Tight cap is arranged in plug lower section, injector control valve, the external of nozzle, and tight cap is fixed together with oil injector body, is arranged in oil injector body
Main 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 cavity of resorption are communicated with supercharger control valve in-line, and supercharger control valve intermediate cavity goes out with supercharger control valve
Oil circuit 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
It presses chamber in-line to be connected to main in-line, check valve, the pressurization that setting communicates therewith below booster cavity is set in booster cavity in-line
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 Injection Control valve base, injector control valve upper 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 is led respectively
In-line be connected to injector control valve epicoele；
The nozzle includes intermediate mass, control chamber static block and needle-valve block, and intermediate mass, control chamber static block and needle-valve block are certainly
Upper and lower setting；Fluid power compensating piston epicoele in-line, non-return passage are set in intermediate mass, check-valves is installed in non-return passage；
Fluid power compensating piston, control chamber oil circuit are set in control chamber static block, it is multiple that fluid power compensating piston is cased with outside fluid power compensating piston
Position spring, the upper end of fluid power compensating piston reset spring is withstood on fluid power compensating piston, under fluid power compensating piston reset spring
End is withstood on control chamber static block below, is formed above fluid power compensating piston and is communicated with fluid power compensating piston epicoele in-line
Fluid power compensating piston epicoele, fluid power compensating piston reset spring present position be fluid power compensating piston cavity of resorption, fluid power compensation live
It fills in and forms fluid power compensating piston draining chamber, control chamber oil communication Injection Control between lower end and control chamber static block below
Valve cavity of resorption；Needle-valve is installed, needle-valve top is cased with needle-valve reset spring, and the upper end of needle-valve reset spring withstands on control chamber in needle-valve block
On static block, the lower end of needle-valve reset spring is withstood on needle-valve, and needle-valve reset spring present position is control chamber, control chamber connection
Oil holding slot in-line is arranged in needle-valve block for control chamber oil circuit, and oil holding slot, the setting of needle-valve block bottom are formed between needle-valve and needle-valve block
Spray orifice, oil holding slot in-line are respectively communicated with oil holding slot, main in-line and booster cavity vent line, and fluid power compensating piston cavity of resorption passes through liquid
Force compensating piston cavity of resorption in-line is connected to the non-return passage below check-valves, and fluid power compensating piston cavity of resorption passes through control connection oil circuit
It is connected to control chamber；
Fuel tank is connected to the import of common rail pipe by filter, low pressure oil transfer pump, high-pressure oil pump, and main in-line is connected to common rail pipe
Oil inlet outlet, the extra exit of common rail pipe is connected to fuel tank by safety valve.
The present invention may also include:
1, when pressurization control valve coil no power, supercharger control valve in-line is connected to oil circuit disconnection, common rail with charged piston
High pressure fuel in pipe is divided into four parts through main in-line: first part enters supercharger control valve through supercharger control valve in-line
Cavity of resorption is stored in intracavitary under supercharger control valve；Second part enters in booster cavity from booster cavity in-line, and passes through booster cavity
Vent line flows out booster cavity, into oil holding slot in-line, flows into oil holding slot；Part III is through fluid power compensating piston epicoele oil inlet
In the influent force compensating piston upper chamber of road；Part IV fuel oil flows into Injection Control through main in-line and injector control valve in-line
Valve epicoele, injector control valve epicoele are connected to injector control valve cavity of resorption, this part of fuel oil is divided into two-way and flows into control chamber, the
It is flowed directly into control chamber through injector control valve cavity of resorption and control chamber oil circuit all the way, the second tunnel is through injector control valve cavity of resorption and fluid power
Compensating piston cavity of resorption in-line influent force compensating piston cavity of resorption, then control chamber is flowed into through fluid power compensating piston cavity of resorption vent line,
Fluid power compensating piston is remain stationary under hydraulic and fluid power compensating piston reset spring collective effect, meanwhile, 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, the conical surface of fuel injector tapered protrusion forms sealing, injector control valve epicoele and injector control valve
Cavity of resorption 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 duct connection, starts draining, and while draining, the fuel oil stored in fluid power compensating piston cavity of resorption is flowed into control chamber, works as control
When the resultant force of intracavitary fuel pressure and needle-valve reset spring is less than the fuel pressure in oil holding slot, needle-valve is lifted, in oil holding slot
The fuel oil of storage can be sprayed from spray orifice, commencement of fuel injection；After injector control valve coil blackout, in injector control valve reset spring
Under effect, injector control valve valve rod resets, and oil spout draining road is closed, and injector control valve epicoele is connected to injector control valve cavity of resorption,
After high pressure fuel in common rail pipe enters injector control valve cavity of resorption, a part enters control chamber, another part through control chamber oil circuit
Influent force compensating piston cavity of resorption, fluid power compensating piston is intracavitary hydraulic under fluid power compensating piston and fluid power compensating piston resets
Resetted under the collective effect of spring, at the same fuel oil intracavitary under fluid power compensating piston by fluid power compensating piston cavity of resorption vent line into
Enter control chamber, when the resultant force of fuel pressure and needle-valve reset spring elastic force is greater than the fuel pressure in oil holding slot, needle-valve is taken a seat,
End of injection.
2, after pressurization control valve coil is powered, supercharger control valve valve rod moves up under the action of electromagnetic force, pressurization control
The conical surface of valve tapered protrusion forms sealing, and 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, groove, flow into plunger shaft by internal oil passages；Charged piston moves downward, to pressurization
Intracavitary fuel oil is pressurized, and needle-valve does not lift；Injection Control valve coil is powered, effect of the injector control valve valve rod in electromagnetic force
Under move up, the conical surface of injector control valve tapered protrusion forms sealing, and injector control valve epicoele and injector control valve cavity of resorption disconnect, spray
Oily draining road and injector control valve cavity of resorption, control chamber oil circuit and control chamber form access, are that control chamber is connected to low pressure oil duct,
Start draining, while draining, the fuel oil stored in fluid power compensating piston cavity of resorption is flowed into control chamber, when the fuel oil in control chamber
When pressure and the resultant force of needle-valve reset spring are less than the fuel pressure in oil holding slot, needle-valve is lifted, the fuel oil stored in oil holding slot
It is sprayed from spray orifice, commencement of fuel injection；After injector control valve coil blackout, under the action of injector control valve reset spring, oil spout
Control valve valve rod resets, and oil spout draining road is closed, and injector control valve epicoele is connected to injector control valve cavity of resorption, the height in common rail pipe
After compression ignition oil enters injector control valve cavity of resorption, a part enters control chamber, another part influent force compensating through control chamber oil circuit
Piston cavity of resorption, fluid power compensating piston is intracavitary hydraulic under fluid power compensating piston and the common work of fluid power compensating piston reset spring
With lower reset, while fuel oil intracavitary under fluid power compensating piston enters control chamber by fluid power compensating piston cavity of resorption vent line, when
When the resultant force of fuel pressure and needle-valve reset spring elastic force is greater than the fuel pressure in oil holding slot, needle-valve is taken a seat, injection process knot
Beam；Supercharger control valve coil blackout, supercharger control valve valve rod reply initial position under the action of supercharger control valve reset spring,
Plunger shaft is connected to oil circuit, groove, charged piston by internal oil passages, groove and is connected to oil circuit, supercharger control valve vent line, pressurization control
Valve intermediate cavity, supercharger control valve epicoele, oil leak hole and pressurization draining road processed and low pressure oil way form access, and charged piston is hydraulic
Under the action of reset.
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 the electric control fuel oil jet system of the invention with fluid power compensating piston has response speed
Fastly, feature with high accuracy is controlled, electric-controlled fuel injector by the invention allows the present invention in non pressurized and two kinds of moulds of pressurization
It works under formula, rail pressure injection can be achieved under no charge mode, sprayed under no charge mode by rail pressure, can be achieved under boost mode super
High-pressure injection, and the flexibility that pressure ratio may be implemented is adjustable；Electric-controlled fuel injector is controlled respectively using two solenoid valves and was pressurized
Journey and injection process, reliability are higher；The fluid power compensating piston that electric-controlled fuel injector nozzle segment includes makes oil spout of the invention
High after rate is first low, end oil spout is quick, improves the combustibility of diesel engine, reduces exhaust emission.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is electric-controlled fuel injector schematic diagram；
Fig. 3 is supercharger control valve schematic diagram；
Fig. 4 is charged piston schematic diagram；
Fig. 5 is injector control valve schematic diagram；
Fig. 6 is nozzle 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. 1-6, electric control fuel oil jet system of the present invention with fluid power compensating piston, including safety valve 1, electronic control injection
Device 2, fuel tank 3, low pressure oil way 4, filter 5, low pressure oil transfer pump 6, high-pressure oil pump 7 and common rail pipe 8.Common rail pipe 8 and high-pressure oil pump
7, low pressure oil transfer pump 6, filter 5 are connected to fuel tank 3, and safety valve 1 is arranged in 8 right end of common rail pipe, are connected with multiple electricity on common rail pipe 8
Fuel injector 2 is controlled, the number of electric-controlled fuel injector 2 determines that electric-controlled fuel injector 2 passes through low pressure oil way 4 and fuel tank 3 according to IC engine cylinder number
Connection.
Electric-controlled fuel injector 2 include injector head 9, supercharger control valve 10, charged piston 11, injector control valve 12, nozzle 13,
Tight cap 14 and oil injector body 15, injector head 9 are mounted on oil injector body 15, supercharger control valve 10, charged piston 11, oil spout control
Valve 12 and nozzle 13 processed are sequentially arranged at from top to bottom in oil injector body 15, and tight cap 14 is fastened on by screw thread with oil injector body 15
Together.
Supercharger control valve 10 is mounted in oil injector body 15, and supercharger control valve 10 includes supercharger control valve return spring holder
17, supercharger control valve iron core 18, supercharger control valve armature 19, supercharger control valve armature chamber 20, supercharger control valve conical surface valve seat 21,
Supercharger control valve valve rod 22, supercharger control valve planar valve seat 24, pressurization control valve coil 32, pressurization control valve coil sealant 33
With supercharger control valve reset spring 34.Supercharger control valve valve rod 22 and supercharger control valve planar valve seat 24 and the supercharger control valve conical surface
Supercharger control valve epicoele 23, supercharger control valve intermediate cavity 30, supercharger control valve cavity of resorption 28 and pressurization are respectively formed between valve seat 21
Draining chamber 26 is provided with oil leak hole 31 and pressurization draining road 27 on supercharger control valve valve rod 22, and supercharger control valve epicoele 23 is by letting out
Oilhole 31, pressurization draining road 27 are connected to low pressure oil way 4；Supercharger control valve intermediate cavity 30 and supercharger control valve vent line 25 connect
It is logical；Supercharger control valve cavity of resorption 28 is connected to by supercharger control valve in-line 29 with main in-line 16；It is pressurized draining chamber 26 and pressurization
Draining road 27 is connected to.
Charged piston 11 is mounted on 10 lower part of supercharger control valve, and 11 stub end of charged piston is equipped with positive stop lug boss, small head end
It is provided with groove 43, internal oil passages 44 is equipped with inside charged piston 11 and is connected to oil circuit 38 with groove.Piston is equipped in oil injector body 15
Chamber 35, draining chamber 36 and booster cavity 42, main in-line 16 are connected to booster cavity 42 by booster cavity in-line 41, booster cavity oil inlet
It is equipped with check valve 40 in road 41, is equipped with booster cavity vent line 39 in 42 lower end of booster cavity, charged piston is connected to oil circuit 37 and groove
43 remain connection, and are connected to oil circuit 38, internal oil passages 44 and plunger shaft 35 with groove and form access.
Injector control valve 12 is mounted on 11 lower end of charged piston, and injector control valve 12 includes injector control valve return spring holder
45, injector control valve iron core 46, injector control valve armature 47, Injection Control valve base 48, injector control valve valve rod 49, oil spout control
Zhi Fa armature chamber 54, Injection Control valve coil 55, Injection Control valve coil sealant 56 and injector control valve reset spring 57.Spray
Injector control valve epicoele 52 and injector control valve cavity of resorption are respectively formed between oil control valve valve rod 49 and Injection Control valve base 48
50, oil spout draining road 53 is provided on injector control valve valve rod 49, is connected to low pressure oil way 4；Injector control valve epicoele 52 passes through spray
Oil control valve in-line 51 is connected to main in-line 16.
Nozzle 13 is mounted on the end of oil injector body 15, and nozzle 13 includes check-valves 58, fluid power compensating piston 59, fluid power benefit
Repay piston reset spring 61, control chamber 63, oil holding slot 64, spray orifice 65, needle-valve 66 and needle-valve reset spring 67.Fluid power compensating piston
59 are mounted on the top of nozzle 13, are equipped with fluid power compensating piston epicoele 72,70 and of fluid power compensating piston cavity of resorption in oil injector body 15
Fluid power compensating piston draining chamber 69,72 top of fluid power compensating piston epicoele are provided with the fluid power compensation being connected to main in-line 16 and live
Chamber in-line 73 beyond the Great Wall, fluid power compensating piston cavity of resorption 70 respectively with fluid power compensating piston cavity of resorption in-line 71 and fluid power compensating piston
Cavity of resorption vent line 68 is connected to, and is equipped with check-valves 58 in fluid power compensating piston cavity of resorption in-line 71；Control chamber 63 and control chamber oil
Road 60 is connected to；Needle-valve reset spring 67 is mounted in control chamber 63, and the top of needle-valve 66 is placed in needle-valve reset spring 67；Contain oil
Slot 64 is connected to oil holding slot in-line 62；13 end of nozzle is provided with spray orifice 65.
Common rail pipe 8 is connected to high-pressure oil pump 7, low pressure oil transfer pump 6, filter 5 and fuel tank 3,8 right end of common rail pipe setting safety
Valve 1, its role is to prevent injection system operation irregularity；Multiple electric-controlled fuel injectors 2, electric-controlled fuel injector 2 are connected on common rail pipe 8
It is connected to by main in-line 16 with common rail pipe 8, meanwhile, electric-controlled fuel injector 2 is also connected to by low pressure oil way 4 with fuel tank 3.
Electric-controlled fuel injector 2 is by injector head 9, supercharger control valve 10, charged piston 11, injector control valve 12, nozzle 13, tight
Cap 14 and oil injector body 15 form, as shown in Figure 2.Injector head 9 is fixed on oil injector body 15, supercharger control valve 10, pressurization
Piston 11, injector control valve 12 and nozzle 13 are separately mounted in oil injector body 15, use spiral shell between tight cap 14 and oil injector body 15
Line connection.Main in-line 16 is provided in oil injector body 15.Supercharger control valve valve rod 22 and supercharger control valve conical surface valve seat 21 and increasing
Supercharger control valve epicoele 23, supercharger control valve intermediate cavity 30, supercharger control valve are respectively formed between pressure control valve planar valve seat 24
Cavity of resorption 28 and pressurization draining chamber 26, main in-line 16 are connected to by supercharger control valve in-line 29 with supercharger control valve cavity of resorption 28；
Pressurization draining chamber 26 is connected to by the pressurization draining road 27 on supercharger control valve valve rod 22 with low pressure oil way 4；Supercharger control valve valve
Supercharger control valve epicoele 23 and pressurization draining road 27 are connected together by the oil leak hole 31 being provided on bar 22.Charged piston 11 is installed
In the lower part of supercharger control valve 10, be equipped with plunger shaft 35, draining chamber 36 and booster cavity 42 in oil injector body 15, main in-line 16 with
It is equipped with booster cavity in-line 41 between booster cavity 42, is equipped with check valve 40 in booster cavity in-line 41；Supercharger control valve vent line
25, charged piston connection oil circuit 37 is connected to the groove 43 on charged piston 11；44 He of internal oil passages is provided on charged piston 11
Groove is connected to oil circuit 38, and plunger shaft 35 is connected to groove 43；Draining chamber 36 is connected to low pressure oil way 4.Injector control valve
12 are mounted on the lower end of charged piston 11, and oil spout control is respectively formed between injector control valve valve rod 49 and Injection Control valve base 48
Valve epicoele 52 and injector control valve cavity of resorption 50 processed, main in-line 16 pass through injector control valve in-line 51 and injector control valve epicoele
52 connections；It is provided with oil spout draining road 53 on injector control valve valve rod 49, is connected to low pressure oil way 4.Liquid is provided in oil injector body 15
Force compensating piston upper chamber 72, fluid power compensating piston cavity of resorption 70, fluid power compensating piston draining chamber 69, control chamber 63 and oil holding slot 64,
It is connected between fluid power compensating piston epicoele 72 and main in-line 16 by fluid power compensating piston epicoele in-line 73, fluid power compensation is lived
Plug cavity of resorption 70 and injector control valve cavity of resorption 50 pass through fluid power compensating piston cavity of resorption in-line 71 and are connected to, fluid power compensating piston cavity of resorption into
Check-valves 58 is installed, fluid power compensating piston cavity of resorption 70 is connected to control by fluid power compensating piston cavity of resorption vent line 68 in oil circuit 71
Chamber 63 processed, fluid power compensating piston draining chamber 69 are connected to low pressure oil way 4.Needle-valve reset spring 65 is mounted in control chamber 63, needle
The top of valve 66 is placed in needle-valve reset spring 67, and the rest part of needle-valve 66 is located in nozzle 13；Oil holding slot 64 and booster cavity
42 are connected to by oil holding slot in-line 62 with booster cavity vent line 39；13 end of nozzle is provided with spray orifice 65.
Supercharger control valve 10 is by supercharger control valve return spring holder 17, supercharger control valve iron core 18, supercharger control valve armature
19, supercharger control valve armature chamber 20, supercharger control valve conical surface valve seat 21, supercharger control valve valve rod 22, supercharger control valve flat valve
Seat 24, pressurization control valve coil 32, pressurization control valve coil sealant 33 and supercharger control valve reset spring 34 form, such as Fig. 3
It is shown.Supercharger control valve armature 19 is fixed on supercharger control valve valve rod 22, is mounted in supercharger control valve armature chamber 20；Pressurization
34 one end of control valve reset spring is mounted on supercharger control valve return spring holder 17, and the other end is mounted on supercharger control valve valve rod
On 22；Supercharger control valve valve rod 22 is fallen in supercharger control valve planar valve seat 24, with supercharger control valve conical surface valve seat 21 and pressurization
Supercharger control valve epicoele 23, supercharger control valve intermediate cavity 30, supercharger control valve cavity of resorption 28 are formed between control valve planar valve seat 24
With pressurization draining chamber 26, when initial position, supercharger control valve epicoele 23 is connected to supercharger control valve intermediate cavity 30, supercharger control valve
Oil leak hole 31 and pressurization draining road 27 are provided on valve rod 22；Supercharger control valve epicoele 23 passes through pressurization draining road 27 and oil leak hole 31
It is connected to low pressure oil way 4, supercharger control valve intermediate cavity 30 is connected to the holding of supercharger control valve vent line 25, and main in-line 16 increases
Pressure control valve in-line 29 is connected to supercharger control valve cavity of resorption 28, and pressurization draining chamber 26 passes through pressurization draining road 27 and low pressure oil way
4 connections, its role is to collect the fuel oil leaked in 22 moving process of supercharger control valve valve rod and be offloaded to low pressure oil way
4。
11 liang of end cross-sectional area differences of charged piston, 11 stub end of charged piston are provided with positive stop lug boss；Under charged piston 11
End is arranged symmetrically two cylinder shape grooves 43 about 11 center line of charged piston, and setting groove is connected to oil circuit among two grooves 43
38, two grooves 43 are connected to oil circuit 38 by groove and are connected to；Internal oil passages 44, internal oil passages 44 are provided at 11 center of charged piston
It is squeezed into since piston major part center, until being connected to oil circuit 38 with groove and being connected to；Be equipped in oil injector body 15 plunger shaft 35,
Draining chamber 36 and booster cavity 42, charged piston 11 are mounted in oil injector body 15, as shown in Figure 4.42 lower end of booster cavity, which is equipped with, to be increased
Chamber in-line 41 and booster cavity vent line 39 are pressed, main in-line 16 is connected to by booster cavity in-line 41 with booster cavity 42, is pressurized
Check valve 40 is equipped in chamber in-line 41, charged piston connection oil circuit 37 is connected to groove 43, and fuel oil can pass through charged piston
It is connected to oil circuit 37, groove 43, groove connection oil circuit 38 and internal oil passages 44 and flows into plunger shaft 35, and when charged piston 11 comes downwards to
When extreme position, charged piston connection oil circuit 37 is still maintained to be connected to groove 43, so that ensure that in pressurization has always
Fuel oil flows into plunger shaft 35.Draining chamber 36 is connected to low pressure oil way 4, on the one hand can will be let out in 11 moving process of charged piston
The fuel oil of leakage unloads in time, on the other hand can also play position-limiting action to charged piston 11.
Injector control valve 12 is by injector control valve return spring holder 45, injector control valve iron core 46, injector control valve armature
47, Injection Control valve base 48, injector control valve valve rod 49, injector control valve armature chamber 54, Injection Control valve coil 55, oil spout
It controls valve coil sealant 56 and injector control valve reset spring 57 forms, as shown in Figure 5.Injector control valve armature 47 is fixed on
On injector control valve valve rod 49, it is mounted in injector control valve armature chamber 54；57 one end of injector control valve reset spring is mounted on
On injector control valve return spring holder 45, the other end is mounted on injector control valve valve rod 49, and injector control valve valve rod 49 is tight
It is pressed on Injection Control valve base 48；It is formed on injector control valve between injector control valve valve rod 49 and Injection Control valve base 48
Chamber 52 and injector control valve cavity of resorption 50, injector control valve epicoele 52 are connected by injector control valve in-line 51 and main in-line 16
Logical, 49 flat seal of injector control valve valve rod, injector control valve epicoele 52 are connected to injector control valve cavity of resorption 50 when initial position；
It is provided with oil spout draining road 53 on injector control valve valve rod 49, is connected to low pressure oil way 4.
Nozzle 13 mainly includes check-valves 58, fluid power compensating piston 59, fluid power compensating piston reset spring 61, control chamber
63, oil holding slot 64, spray orifice 65, needle-valve 66 and needle-valve reset spring 67.Be equipped in oil injector body 15 fluid power compensating piston epicoele 72,
Fluid power compensating piston cavity of resorption 70, fluid power compensating piston draining chamber 69, control chamber 63 and oil holding slot 64；Main in-line 16 passes through fluid power
Compensating piston epicoele in-line 73 is connected to fluid power compensating piston 59, and fluid power benefit is respectively set in 70 two sides of fluid power compensating piston cavity of resorption
Piston cavity of resorption in-line 71 and fluid power compensating piston cavity of resorption vent line 68 are repaid, is equipped with only in fluid power compensating piston cavity of resorption in-line 71
Return valve 58, its role is to prevent the fuel flow returns in fluid power compensating piston cavity of resorption 70, fluid power compensating piston draining chamber 69 with it is low
Pressure oil road 4 is connected to, the fuel oil for leaking in 59 moving process of collection liquid force compensating piston, and is played to fluid power compensating piston 59
The effect of limit；Fuel oil is flowed into oil holding slot 64 by oil holding slot in-line 62；63 top of control chamber is equipped with control chamber oil circuit 60,
Needle-valve reset spring 67 is mounted in control chamber 63；The top of needle-valve 66 covers in needle-valve reset spring 67, and rest part is located at
In nozzle 13；13 end of nozzle is provided with spray orifice 65, and when initial position, needle-valve 66 is taken a seat, and spray orifice 65 is closed, as shown in Figure 6.Control
The resultant force of fuel pressure and needle-valve reset spring 67 in chamber 63 will determine the lift of needle-valve 66 with the fuel pressure in oil holding slot 64
It rises and takes a seat, and then control the connection or disconnection of oil holding slot 64 and spray orifice 65.
The course of work of electric control fuel oil jet system with fluid power compensating piston of the invention is as follows:
Low-voltage fuel in fuel tank 3 is fed in high-pressure oil pump 7, then after the filtering of filter 5 by low pressure oil transfer pump 6
High-pressure oil pump 7 to from the fuel oil of fuel tank 3 can be pressurized and pressurized high pressure fuel is transported in common rail pipe 8, automatically controlled
Main in-line 16 in fuel injector 2 is connected to common rail pipe 8.
When electric-controlled fuel injector 2 works under no charge mode, the no power always of pressurization control valve coil 32 is pressurized at this time
Control valve in-line 29 is connected to the disconnection of oil circuit 37 with charged piston, and the high pressure fuel in common rail pipe 8 can be divided into through main in-line 16
Four part first parts enter supercharger control valve cavity of resorption 28 through supercharger control valve in-line 29, are stored in supercharger control valve cavity of resorption
In 28；Second part enters in booster cavity 42 from booster cavity in-line 41, and flows out booster cavity by booster cavity vent line 39
42, fuel oil enters oil holding slot in-line 58 after flowing out booster cavity 42, finally flows into oil holding slot 60；Part III is compensated through fluid power
In 73 influent force compensating piston upper chamber 72 of piston upper chamber in-line；Part IV fuel oil is through main in-line 16 and injector control valve
In-line 51 flows into injector control valve epicoele 52, since 49 conical surface of injector control valve valve rod is opened at this time, flat seal, so spray
Oil control valve epicoele 52 is connected to injector control valve cavity of resorption 50, therefore this part of fuel oil is eventually divided into two-way and flows into control chamber
In 63, the first via flows directly into control chamber 63 through injector control valve cavity of resorption 50 and control chamber oil circuit 60, and the second tunnel is through oil spout control
71 influent force compensating piston cavity of resorption 70 of valve cavity of resorption 50 and fluid power compensating piston cavity of resorption in-line processed, then through under fluid power compensating piston
Chamber vent line 68 flows into control chamber 63.Fluid power compensating piston epicoele 72 and fluid power compensating piston cavity of resorption 70 have been each filled with high pressure at this time
Fuel oil, fluid power compensating piston 59 can be remain stationary under hydraulic and fluid power compensating piston reset spring 61 collective effect, meanwhile,
Needle-valve 66 can also keep taking a seat under the collective effect of fuel pressure and needle-valve reset spring 67, and fuel injector does not work.Work as oil spout
After controlling the energization of valve coil 55, injector control valve valve rod 49 moves up under the action of electromagnetic force, so that plane be made to open, the conical surface is close
Envelope, injector control valve epicoele 52 and injector control valve cavity of resorption 50 disconnect at this time, due to being provided with oil spout on injector control valve valve rod 49
Draining road 53, so oil spout draining road 53 can be with injector control valve cavity of resorption 50, control chamber oil circuit 60 and control when plane is opened
Chamber 63 processed forms access, and then control chamber 63 is connected to low pressure oil way 4, starts draining, and while draining process carries out, fluid power is mended
Repaying the fuel oil stored in piston cavity of resorption 70 can flow into control chamber 63, but since 60 draining speed of control chamber oil circuit is greater than liquid
The repairing speed of force compensating piston cavity of resorption vent line 68 only reduces so the fuel pressure in control chamber 63 can be gradually reduced
Amplitude it is smaller, when in control chamber 63 fuel pressure and needle-valve reset spring 67 resultant force be less than oil holding slot 64 in fuel oil pressure
When power, needle-valve 66, which will be slow, to be lifted, and the fuel oil stored in oil holding slot 64 can be sprayed from spray orifice 65, commencement of fuel injection.Because fluid power is mended
It repays and is equipped with check-valves 58 in piston cavity of resorption in-line 71, so carrying out repairing to control chamber 63 in fluid power compensating piston cavity of resorption 70
It does not have fuel oil in the process and enters fluid power compensating piston cavity of resorption 70, and fluid power compensating piston epicoele 72 is filled with high compression ignition always
Oil, therefore with the outflow of fuel oil in fluid power compensating piston cavity of resorption 70, fluid power compensating piston 59 can be in fluid power compensating piston epicoele
It moves down under the action of the pressure difference formed between 72 and fluid power compensating piston cavity of resorption 70, accelerates under fluid power compensating piston to reach
70 internal combustion oil stream of chamber enters the purpose of control chamber 63, and oil replenishing process can be continued for complete to the fuel oil in fluid power compensating piston cavity of resorption 70
Portion terminates when flowing into control chamber 63；After oil replenishing process, remaining fuel oil will directly pass through control chamber oil in control chamber 63
Road 60 vents, it is synchronous with draining process compared to oil replenishing process before carry out, at this time 63 draining speed of control chamber faster, needle-valve 66
Lift it is more rapid, thus anxious after realizing first the delaying of fuel injection rate.In addition, the oil spout draining road 53 on injector control valve valve rod 49
During draining cooling effect can be played to solenoid valve；After Injection Control valve coil 55 powers off, resetted in injector control valve
Under the action of spring 57, injector control valve valve rod 49 resets, and plane is closed once again, and the conical surface is opened once again, and oil spout draining road 53 is closed
It closes, injector control valve epicoele 52 is connected to injector control valve cavity of resorption 50, and the fuel oil in common rail pipe 8 enters injector control valve cavity of resorption 50
Afterwards, a part enters control chamber 63, another part meeting influent force compensating piston cavity of resorption 70, fluid power compensation through control chamber oil circuit 60
Piston 59 can reset under hydraulic in fluid power compensating piston cavity of resorption 70 and fluid power compensating piston reset spring 61 collective effect,
The fuel oil in fluid power compensating piston cavity of resorption 70 can also enter control chamber 63 by fluid power compensating piston cavity of resorption vent line 68 simultaneously, by
There is two-way fuel oil to flow into control chamber 63 in simultaneously, so the pressure in control chamber 63 can be increased quickly, when fuel pressure and needle-valve
When the resultant force of 67 elastic force of reset spring is greater than the fuel pressure in oil holding slot 64, needle-valve 66 is quickly taken a seat, and injection process is tied rapidly
Beam.
When electric-controlled fuel injector 2 works under boost mode, the high pressure fuel in common rail pipe 8 can be divided into through main in-line 16
Four parts: first part enters supercharger control valve cavity of resorption 28 through supercharger control valve in-line 29, is stored under supercharger control valve
In chamber 28；Second part enters in booster cavity 42 from booster cavity in-line 41, and passes through the outflow pressurization of booster cavity vent line 39
Chamber, fuel oil enter oil holding slot in-line 62 after flowing out booster cavity 42, finally flow into oil holding slot 64；Part III is compensated through fluid power
In 73 influent force compensating piston upper chamber 72 of piston upper chamber in-line；Part IV fuel oil is through main in-line 16 and injector control valve
In-line 51 flows into injector control valve epicoele 52, since 49 conical surface of injector control valve valve rod is opened at this time, flat seal, so spray
Oil control valve epicoele 52 is connected to injector control valve cavity of resorption 50, therefore this part of fuel oil is eventually divided into two-way and flows into control chamber
In 63, the first via flows directly into control chamber 63 through injector control valve cavity of resorption 50 and control chamber oil circuit 60, and the second tunnel is through oil spout control
71 influent force compensating piston cavity of resorption 70 of valve cavity of resorption 50 and fluid power compensating piston cavity of resorption in-line processed, then through under fluid power compensating piston
Chamber vent line 68 flows into control chamber 63.Fluid power compensating piston epicoele 72 and fluid power compensating piston cavity of resorption 70 have been each filled with high pressure at this time
Fuel oil, fluid power compensating piston 59 can be remain stationary under hydraulic and fluid power compensating piston reset spring 61 collective effect, meanwhile,
Needle-valve 66 can also keep taking a seat under the collective effect of fuel pressure and needle-valve reset spring 67, and fuel injector does not work.Work as pressurization
After controlling the energization of valve coil 32, supercharger control valve valve rod 22 can move up under the action of electromagnetic force, realize conical surface seal, and plane is opened
It opens, the fuel oil of supercharger control valve cavity of resorption 28 will flow into supercharger control valve intermediate cavity 30, supercharger control valve vent line 25, increase at this time
It presses piston 11 to be connected to oil circuit, groove 43, groove and is connected to oil circuit 38, flow into plunger shaft 35 eventually by internal oil passages 44；It lives at this time
The high pressure fuel being filled in plug chamber 35 and booster cavity 42 in common rail pipe 8, but major part and microcephaly due to charged piston 11
There are difference in areas, therefore will form pressure difference at 11 both ends of charged piston, and then charged piston 11 is just in this pressure difference
It is moved downward under effect, the fuel oil in booster cavity 42 is pressurized.Check valve 40 is equipped in booster cavity in-line 41, it can be to prevent
Only pressurized super-pressure fuel flow returns are into common rail pipe 8, so what is stored in final oil holding slot 64 is pressurized super-pressure
Fuel oil, the oil pressure in oil holding slot 64 is higher than the oil pressure in control chamber 63 at this time, but since oil holding slot 64 and control chamber 63 are deposited
In biggish difference in areas, along with the effect of needle-valve reset spring 67, so needle-valve 66 can't lift；Then, oil spout control
Valve coil 55 processed is powered, and injector control valve valve rod 49 can move up under the action of electromagnetic force, realizes conical surface seal, and plane is opened,
Injector control valve epicoele 52 and injector control valve cavity of resorption 50 disconnect, due to being provided with oil spout draining road on injector control valve valve rod 49
53, so oil spout draining road 53 can be with injector control valve cavity of resorption 50, control chamber oil circuit 60 and control chamber 63 when plane is opened
Access is formed, then control chamber 63 is connected to low pressure oil way 4, start draining, while draining process carries out, fluid power compensating piston
The fuel oil stored in cavity of resorption 70 can flow into control chamber 63, but since 60 draining speed of control chamber oil circuit is greater than fluid power compensation
The repairing speed of piston cavity of resorption vent line 68, so the fuel pressure in control chamber 63 can be gradually reduced, the amplitude only reduced
It is smaller, when the resultant force of fuel pressure and needle-valve reset spring 67 in control chamber 63 is less than the fuel pressure in oil holding slot 64,
Needle-valve 66, which will be slow, to be lifted, and the fuel oil stored in oil holding slot 64 can be sprayed from spray orifice 65, commencement of fuel injection.Because of fluid power compensating piston
Check-valves 58 is equipped in cavity of resorption in-line 71, so during fluid power compensating piston cavity of resorption 70 carries out repairing to control chamber 63
Fuel oil is not had enters fluid power compensating piston cavity of resorption 70, and fluid power compensating piston epicoele 72 is filled with high pressure fuel always, therefore
With the outflow of fuel oil in fluid power compensating piston cavity of resorption 70, fluid power compensating piston 59 can be in fluid power compensating piston epicoele 72 and fluid power
It is moved down under the action of the pressure difference formed between compensating piston cavity of resorption 70, accelerates 70 internal combustion of fluid power compensating piston cavity of resorption to reach
Oil stream enters the purpose of control chamber 63, and oil replenishing process can be continued for all flowing into control to the fuel oil in fluid power compensating piston cavity of resorption 70
Terminate when chamber 63 processed；After oil replenishing process, remaining fuel oil will be vented directly by control chamber oil circuit 60 in control chamber 63,
Synchronous with draining process compared to oil replenishing process before to carry out, faster, needle-valve 66 lifts more 63 draining speed of control chamber at this time
Rapidly, to realize the first slow rear anxious of fuel injection rate.Because being provided with oil spout draining road 53 on injector control valve valve rod 49,
Fuel oil is had during 63 draining of control chamber and flows through injector control valve valve rod 49, this can play cooling work to injector control valve 12
With.After Injection Control valve coil 55 powers off, under the action of injector control valve reset spring 57, injector control valve valve rod 49 is multiple
Position, plane are closed once again, and the conical surface is opened once again, and oil spout draining road 53 is closed, under injector control valve epicoele 52 and injector control valve
Chamber 50 is connected to, and after the fuel oil in common rail pipe 8 enters injector control valve cavity of resorption 50, a part enters control chamber through control chamber oil circuit 60
63, another part meeting influent force compensating piston cavity of resorption 70, the meeting of fluid power compensating piston 59 liquid in fluid power compensating piston cavity of resorption 70
It is resetted under pressure and the collective effect of fluid power compensating piston reset spring 61, while the fuel oil in fluid power compensating piston cavity of resorption 70 is also
Control chamber 63 can be entered by fluid power compensating piston cavity of resorption vent line 68, due to thering is two-way fuel oil to flow into control chamber 63, institute simultaneously
It can quickly be increased with the pressure in control chamber 63, when the resultant force of fuel pressure and 67 elastic force of needle-valve reset spring is greater than oil holding slot 64
When interior fuel pressure, needle-valve 66 is quickly taken a seat, and injection process terminates rapidly.Finally, pressurization control valve coil 32 powers off, pressurization
Control valve valve rod 22 can reply initial position under the action of supercharger control valve reset spring 34, realize that flat seal, the conical surface are opened
It opens, plunger shaft 35 is connected to oil circuit 38, groove 42, charged piston by internal oil passages 44, groove and is connected to oil circuit 37, pressurization control at this time
Valve vent line 25, supercharger control valve intermediate cavity 30, supercharger control valve epicoele 23, oil leak hole 31 and pressurization draining road 27 processed and low pressure
Oil circuit 4 forms access, therefore the fuel oil in plunger shaft 35 can leak into low pressure oil way 4, due to store always in booster cavity 42
High pressure fuel in common rail pipe 8 does standard so charged piston 11 can reset under the action of hydraulic for pressurization next time
It is standby.Because having fuel oil during 35 draining of plunger shaft flows through pressurization draining road 27, supercharger control valve 10 can be played cold
But it acts on.Charged piston connection oil circuit 37 can be remained with groove 42 during 11 downlink of charged piston to be connected to, so
If thering is electric current to pass through always in pressurization control valve coil 32, federation is full of fuel oil in plunger shaft 35, and work as charged piston 11
Maximum boost ratio can be obtained when reaching maximum displacement, once and pressurization control valve coil 32 power off, charged piston 11 will be fast
Position is replied immediately, response speed quickly, therefore can realize the flexibility of pressure ratio by changing the control strategy of supercharger control valve 10
It is adjustable.
Claims (5)
1. the electric control fuel oil jet system with fluid power compensating piston, it is characterized in that: including electric-controlled fuel injector, fuel tank, common rail pipe；
The electric-controlled fuel injector includes oil injector body, supercharger control valve, charged piston, injector control valve, nozzle, pressurization control
Valve, charged piston are mounted in oil injector body from top to bottom, and injector control valve, nozzle are sequentially arranged at charged piston from top to bottom
Tight cap is arranged in lower section, injector control valve, the external of nozzle, and tight cap is fixed together with oil injector body, and master is arranged in oil injector body
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 cavity of resorption are communicated with supercharger control valve in-line, supercharger control valve intermediate cavity and supercharger control valve vent line
It 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
In-line is connected to main in-line, and check valve is arranged in booster cavity 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 Injection Control valve base, injector control valve upper 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, the main oil inlet respectively of injector control valve in-line are set in Injection Control valve base
Road be connected to injector control valve epicoele；
The nozzle includes intermediate mass, control chamber static block and needle-valve block, intermediate mass, control chamber static block and needle-valve block from upper and
Lower setting；Fluid power compensating piston epicoele in-line, non-return passage are set in intermediate mass, check-valves is installed in non-return passage；Control
Fluid power compensating piston, control chamber oil circuit are set in chamber static block, fluid power compensating piston is cased with outside fluid power compensating piston and resets bullet
The upper end of spring, fluid power compensating piston reset spring is withstood on fluid power compensating piston, the lower end top of fluid power compensating piston reset spring
On control chamber static block thereunder, the liquid communicated with fluid power compensating piston epicoele in-line is formed above fluid power compensating piston
Force compensating piston upper chamber, fluid power compensating piston reset spring present position is fluid power compensating piston cavity of resorption, under fluid power compensating piston
It holds and forms fluid power compensating piston draining chamber between control chamber static block below, under control chamber oil communication injector control valve
Chamber；Needle-valve is installed, needle-valve top is cased with needle-valve reset spring, and it is static that the upper end of needle-valve reset spring withstands on control chamber in needle-valve block
On block, the lower end of needle-valve reset spring is withstood on needle-valve, and needle-valve reset spring present position is control chamber, control chamber connection control
Oil holding slot in-line is arranged in needle-valve block for chamber oil circuit, and oil holding slot, the setting spray of needle-valve block bottom are formed between needle-valve and needle-valve block
Hole, oil holding slot in-line are respectively communicated with oil holding slot, main in-line and booster cavity vent line, and fluid power compensating piston cavity of resorption passes through fluid power
Compensating piston cavity of resorption in-line is connected to the non-return passage below check-valves, and fluid power compensating piston cavity of resorption is connected by control connection oil circuit
Logical control chamber；
Fuel tank is connected to the import of common rail pipe by filter, low pressure oil transfer pump, high-pressure oil pump, main in-line connection common rail pipe into
The extra exit of oil export, common rail pipe is connected to fuel tank by safety valve.
2. the electric control fuel oil jet system according to claim 1 with fluid power compensating piston, it is characterized in that: supercharger control valve
When coil no power, supercharger control valve in-line is connected to oil circuit disconnection with charged piston, the high pressure fuel in common rail pipe through it is main into
Oil circuit is divided into four parts: first part enters supercharger control valve cavity of resorption through supercharger control valve in-line, is stored in pressurization control
It is intracavitary under valve；Second part enters in booster cavity from booster cavity in-line, and flows out booster cavity by booster cavity vent line, into
Enter oil holding slot in-line, flows into oil holding slot；Part III is through fluid power compensating piston epicoele in-line influent force compensating piston
It is upper intracavitary；Part IV fuel oil flows into injector control valve epicoele, injector control valve through main in-line and injector control valve in-line
Epicoele is connected to injector control valve cavity of resorption, this part of fuel oil is divided into two-way and flows into control chamber, and the first via is through injector control valve
Cavity of resorption and control chamber oil circuit flow directly into control chamber, and the second tunnel is through injector control valve cavity of resorption and fluid power compensating piston cavity of resorption oil inlet
Road influent force compensating piston cavity of resorption, then control chamber is flowed into through fluid power compensating piston cavity of resorption vent line, fluid power compensating piston is in liquid
It is remain stationary under pressure and the collective effect of fluid power compensating piston reset spring, meanwhile, needle-valve resets bullet in fuel pressure and needle-valve
It keeps taking a seat under the collective effect of spring；After Injection Control valve coil is powered, injector control valve valve rod is under the action of electromagnetic force
It moves up, the conical surface of fuel injector tapered protrusion forms sealing, and injector control valve epicoele and injector control valve cavity of resorption disconnect, oil spout draining
Road and injector control valve cavity of resorption, control chamber oil circuit and control chamber form access, and control chamber is connected to low pressure oil duct, starts to let out
Oil, while draining, the fuel oil stored in fluid power compensating piston cavity of resorption is flowed into control chamber, when in control chamber fuel pressure with
When the resultant force of needle-valve reset spring is less than the fuel pressure in oil holding slot, needle-valve is lifted, and the fuel oil stored in oil holding slot can be from spray
Hole sprays, commencement of fuel injection；After injector control valve coil blackout, under the action of injector control valve reset spring, Injection Control
Valve valve rod resets, and oil spout draining road is closed, and injector control valve epicoele is connected to injector control valve cavity of resorption, the high compression ignition in common rail pipe
After oil enters injector control valve cavity of resorption, a part enters control chamber, another part influent force compensating piston through control chamber oil circuit
Cavity of resorption, under fluid power compensating piston is intracavitary hydraulic under fluid power compensating piston and the collective effect of fluid power compensating piston reset spring
It resets, while fuel oil intracavitary under fluid power compensating piston enters control chamber by fluid power compensating piston cavity of resorption vent line, works as fuel oil
When pressure and the resultant force of needle-valve reset spring elastic force are greater than the fuel pressure in oil holding slot, needle-valve is taken a seat, end of injection.
3. the electric control fuel oil jet system according to claim 1 or 2 with fluid power compensating piston, it is characterized in that: when pressurization
After controlling valve coil energization, supercharger control valve valve rod moves up under the action of electromagnetic force, the conical surface of supercharger control valve tapered protrusion
Sealing is formed, the fuel oil of supercharger control valve cavity of resorption flows into supercharger control valve intermediate cavity, supercharger control valve vent line, charged piston and connects
Logical oil circuit, groove, flow into plunger shaft by internal oil passages；Charged piston moves downward, and increases to the fuel oil in booster cavity
Pressure, needle-valve do not lift；Injection Control valve coil is powered, and injector control valve valve rod moves up under the action of electromagnetic force, Injection Control
The conical surface of valve tapered protrusion forms sealing, and injector control valve epicoele and injector control valve cavity of resorption disconnect, oil spout draining road and oil spout
Control valve cavity of resorption, control chamber oil circuit and control chamber form access, are that control chamber is connected to low pressure oil duct, start draining, draining
While, the interior fuel oil stored of fluid power compensating piston cavity of resorption flows into control chamber, when the fuel pressure in control chamber is answered with needle-valve
When the resultant force of position spring is less than the fuel pressure in oil holding slot, needle-valve is lifted, and the fuel oil stored in oil holding slot is sprayed from spray orifice, is opened
Beginning oil spout；After injector control valve coil blackout, under the action of injector control valve reset spring, injector control valve valve rod is multiple
Position, oil spout draining road are closed, and injector control valve epicoele is connected to injector control valve cavity of resorption, and the high pressure fuel in common rail pipe enters spray
After oil control valve cavity of resorption, a part enters control chamber, another part influent force compensating piston cavity of resorption, fluid power through control chamber oil circuit
It is resetted under compensating piston is intracavitary hydraulic under fluid power compensating piston and the collective effect of fluid power compensating piston reset spring, simultaneously
Intracavitary fuel oil enters control chamber by fluid power compensating piston cavity of resorption vent line under fluid power compensating piston, when fuel pressure and needle-valve
When the resultant force of reset spring elastic force is greater than the fuel pressure in oil holding slot, needle-valve is taken a seat, and injection process terminates；Supercharger control valve line
Circle power-off, supercharger control valve valve rod reply initial position under the action of supercharger control valve reset spring, and plunger shaft passes through inside
Oil circuit, groove, charged piston connection oil circuit, supercharger control valve vent line, supercharger control valve intermediate cavity, increases groove connection oil circuit
Pressure control valve epicoele, oil leak hole and pressurization draining road and low pressure oil way form access, and charged piston resets under the action of hydraulic.
4. the electric control fuel oil jet system according to claim 1 or 2 with fluid power compensating piston, it is characterized in that: pressurization is lived
The small head end groove of plug is two cylinder shape grooves being arranged symmetrically about charged piston center line, between two cylinder shape grooves
Groove is set and is connected to oil circuit.
5. the electric control fuel oil jet system according to claim 3 with fluid power compensating piston, it is characterized in that: charged piston
Small head end groove is two cylinder shape grooves being arranged symmetrically about charged piston center line, is arranged between two cylinder shape grooves
Groove is connected to oil circuit.
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| CN201810835537.8A CN109209709B (en) | 2018-07-26 | 2018-07-26 | Electric control fuel injection system with hydraulic compensation piston |
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| CN201810835537.8A CN109209709B (en) | 2018-07-26 | 2018-07-26 | Electric control fuel injection system with hydraulic compensation piston |
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| CN109209709B CN109209709B (en) | 2020-12-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761838A (en) * | 2021-01-25 | 2021-05-07 | 哈尔滨工程大学 | Modular diesel engine double-valve common rail system with flexibly adjustable oil injection rule |
| CN112761837A (en) * | 2021-01-25 | 2021-05-07 | 哈尔滨工程大学 | Modular supercharged variable-oil-injection ultrahigh-pressure diesel engine common-rail fuel system |
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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 |
| 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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| 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 |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112761838A (en) * | 2021-01-25 | 2021-05-07 | 哈尔滨工程大学 | Modular diesel engine double-valve common rail system with flexibly adjustable oil injection rule |
| CN112761837A (en) * | 2021-01-25 | 2021-05-07 | 哈尔滨工程大学 | Modular supercharged variable-oil-injection ultrahigh-pressure diesel engine common-rail fuel system |
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| CN109209709B (en) | 2020-12-04 |
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