CN109139316A - Intensified electric control fuel oil jet system peculiar to vessel - Google Patents
Intensified electric control fuel oil jet system peculiar to vessel Download PDFInfo
- Publication number
- CN109139316A CN109139316A CN201810835504.3A CN201810835504A CN109139316A CN 109139316 A CN109139316 A CN 109139316A CN 201810835504 A CN201810835504 A CN 201810835504A CN 109139316 A CN109139316 A CN 109139316A
- Authority
- CN
- China
- Prior art keywords
- oil
- servo
- valve
- fuel injector
- needle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
-
- 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
Landscapes
- 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 intensified electric control fuel oil jet system peculiar to vessel, including servo fuel tank, miscella oil sump tank, low-lift pump, high-pressure pump, servo oil common rail pipe, heavy oil oil transfer pump, fuel injector, miscella oil return pipelines, heavy oil fuel tank.Servo fuel tank, low-lift pump, high-pressure pump are gradually connected by pipeline, and high-pressure pump is connect with servo oil common rail pipe.Fuel injector and servo oil common rail pipe, servo oil oil return pipeline, miscella oil return pipeline and the connection of heavy oil oil transfer pump.Miscella oil return pipeline connects miscella oil sump tank, and servo oil oil return pipeline connects servo fuel tank, and heavy oil oil transfer pump connects heavy oil fuel tank.The present invention is pressurized using servo oil to heavy oil, and is disposed with special miscella oil return line, it can be achieved that superhigh pressure jetting and suitable marine diesel use.
Description
Technical field
The present invention relates to a kind of diesel engines, specifically Performance of Fuel-Injection System for Marine Diesel Engines.
Background technique
Diesel engine is as the best dynamic power machine of thermal efficiency highest, capacity usage ratio is currently known, using electronic control
After become more cleaning with intelligence.Currently, diesel engine is still held the lead in terms of power peculiar to vessel.Fuel injection system is hair
The heart of motivation, as the common people are to the increasingly raising of oil consumption standard and increasingly stringent, the diesel fuel system of emission regulation
Develop self-evident with improved necessity.Traditional mechanical fuel injection system generally comprise injection pump, high-pressure oil pipe with
Fuel injector, the electric control fuel oil jet system to grow up in recent years then generally comprise booster pump, common rail pipe, fuel injector, ECU etc.,
But mainly based on automobile-used electric control fuel oil jet system, current electric control fuel oil jet system peculiar to vessel is using relatively limited.
For economical reasons, marine diesel has suitable accounting heavy oil combustion.For fuel system, to make
It must design specialized oil transfer oil circuit with heavy oil.And in order to realize superhigh pressure jetting, in order to which fuel oil is preferably atomized and is fired
It burns, supercharging device is added in fuel injector as one of solution；Then, heavy oil must be done with servo oil circuit in fuel injector
It is isolated out and is polluted to avoid servo oil.For electric-controlled fuel injector, actuator is also required to make with heavy oil and be effectively isolated.
And if improvement is only made in original fuel system, fuel system especially fuel injector oil circuit will be caused complicated and redundancy,
Weight will be significantly increased with size, and can bring difficulty to installation and the arrangement of fuel system.
Summary of the invention
The purpose of the present invention is to provide super-pressure oil spout may be implemented, it is suitable for the fluid power peculiar to vessel that marine diesel uses
Booster-type electric control fuel oil jet system.
The object of the present invention is achieved like this:
Present invention intensified electric control fuel oil jet system peculiar to vessel, it is characterized in that: including fuel injector, servo fuel tank, watching
Oily common rail pipe, heavy oil fuel tank are taken,
The fuel injector includes fuel injector upper body, fuel injector intermediate, fuel injector lower body, electromagnetic valve component, booster group
Part, pintle nozzle match-ing parts, oily device upper body, fuel injector intermediate and fuel injector lower body are arranged from top to bottom, open up and watch on fuel injector upper body
Oily oil inlet, servo oil oil return opening, the main oil return line of servo oil, servo oil oil return branch, heavy oil oil inlet, high pressure oil input channel are taken,
The main oil return line connection servo oil oil return opening of servo oil and servo oil oil return branch, high pressure oil input channel are connected to servo oil oil inlet；
The electromagnetic valve component includes end cap, iron core, armature, valve rod, and the top of valve rod is arranged in fuel injector upper body, valve
The lower part of bar stretches in fuel injector intermediate, and armature is fixed on the top of valve rod, and the chamber where armature is connected to meter out hole,
Meter out hole is connected to the main oil return line of servo oil, and iron core is arranged in the top of armature, and end cap, the middle part of iron core is arranged in the top of iron core
Magnetic valve spring is set, and the both ends of magnetic valve spring are withstood on end cap and valve rod respectively, wound around coil in iron core, valve rod and oil spout
Device upper body forms top ring cavity, and valve rod and fuel injector intermediate form lower part ring cavity and pressure-releasing chamber, valve rod, fuel injector upper body, spray
Intermediate ring cavity is formed between oily device intermediate three, the transverse holes and longitudinal hole, transverse holes and longitudinal direction that stem internal setting communicates
Hole constitutes pressure release passage, and setting pressurization oil input channel, communicating passage, servo oil communicating passage, is pressurized oil inlet in fuel injector intermediate
Road is connected to lower part ring cavity and high pressure oil input channel, communicating passage connection middle part ring cavity, and servo oil communicating passage is connected to servo oil master and returns
Oil circuit, servo oil oil return branch are connected to top ring cavity；
The supercharger assembly includes charged piston, and charged piston is arranged in fuel injector lower body, opens in fuel injector lower body
There are oil entered window, pressurization window, servo oil oil return window, pressurization oil duct, pressure communication channel, oil spout window, charged piston packet
Stub end and small head end are included, microcephaly's end cap has charged piston spring, and the upper and lower ends of charged piston spring withstand on stub end respectively
On booster lower body, booster cavity, charged piston spring position are formed between small head end and booster lower body below
For low pressure chamber, charged piston ring cavity is arranged in stub end middle part, and servo oil oil return window is connected to servo oil communicating passage, is pressurized oil duct
Be respectively communicated with booster cavity and pressurization window, oil entered window is connected to heavy oil oil input channel and low pressure chamber, charged piston upper surface be connected to
Channel communicates, and pressure communication channel is connected to the main in-line of servo oil by meter in hole, and it is logical that oil spout window is connected to pressure communication
Road；
The pintle nozzle match-ing parts include needle-valve body, needle-valve, nozzle, and nozzle is located at below needle-valve body, and needle-valve is located in needle-valve body
And oil holding slot is formed between needle-valve body, needle valve spring, needle valve spring place are protruded into fuel injector lower body and be cased in needle-valve top
Position is needle control chamber, and needle control chamber is connected to pressure communication channel, and needle-valve body lower end is spherical and is provided with through-hole, needle-valve
Lower end is the face of needle seating with the spherical lower end cooperation of needle-valve body, opens up injection channel in nozzle, nozzle-end opens up spray orifice；
Heavy oil fuel tank is connected to the heavy oil oil inlet of fuel injector by filter, heavy oil oil transfer pump, and servo fuel tank passes through low pressure
Pump, high-pressure pump, high-pressure oil pipe are connected to the oil inlet of servo oil common rail pipe, and the oil outlet connection fuel injector of servo oil common rail pipe is watched
Oily oil inlet is taken, the oil return opening of servo oil common rail pipe is connected to servo fuel tank by pressure limiting valve, and the servo oil oil return opening of fuel injector connects
Logical servo fuel tank.
The present invention may also include:
It 1, further include miscella oil sump tank；Miscella oil return opening is set in fuel injector upper body, is arranged in fuel injector lower body mixed
Oily back oil road is closed, miscella back oil road is connected to miscella oil return opening, and the stub end of charged piston is machined with miscella oil trap, mixes
It closes oily oil trap and miscella back oil road is connected to by miscella oil outlet；Miscella oil road and needle-valve mixing are set in needle-valve body
Oily oil trap, miscella oil road are respectively communicated with miscella back oil road and needle-valve miscella oil trap；
The miscella oil return opening of fuel injector is connected to miscella oil sump tank.
2, the diameter in the hole of oil spout window is greater than the diameter in meter in hole.
3, when original state, electromagnetic valve coil no power, valve rod is pressed in fuel injector under the action of the power of magnetic valve spring
On the upper surface of intermediate, realize flat seal with fuel injector intermediate, intermediate ring cavity and the partition of lower part ring cavity at this time and with it is upper
The connection of portion's ring cavity, low pressure servo oil act on charged piston upper surface through communicating passage；Charged piston is located at uppermost position,
Its top is contacted with fuel injector intermediate, is located at initial position at this time for charged piston, the charged piston ring cavity in initial position
Lower surface is higher than oil spout upper window edge face on axial position, i.e. charged piston ring cavity is not connected to pressure communication channel, and increases
The lower along face of the slot for being higher than pressurization window on the axial position of piston shoulder face is pressed, i.e. low pressure chamber is connected to pressurization oil duct；When pressurization is lived
When plug is located at initial position, intracavitary noticeable degree is high pressure servo oil, in the work of servo oil pressure and the spring force of needle valve spring
Under, the face of needle seating of needle-valve is contacted with the needle valve seat' s cone of needle-valve body realizes linear sealing, and oil holding slot and injection channel is prevented to connect
It is logical；
When electromagnetic valve coil is powered, armature is moved up by electromagnetic force, and is moved up with ovable valve stem so that valve rod and fuel injector upper body
Contact realizes linear sealing to cut off the connection of intermediate ring cavity Yu top ring cavity；At the same time, valve rod moves up so that lower loop
Chamber is connected to intermediate ring cavity, and high pressure servo oil acts on charged piston upper surface by communicating passage, and charged piston is in high pressure
The spring force of charged piston spring is overcome to move down under the action of servo oil, charged piston shoulder face covers in increasing first in folding process
Window is pressed, that is, cut off low pressure chamber and is pressurized the connection of oil duct, pressurization oil duct, booster cavity, oil holding slot constitute enclosure space, increase
Pressure piston continues to move down the heavy oil compressed in the enclosure space, i.e., is pressurized to heavy oil in the space；Under charged piston continues
It moves, when oil spout window is opened in charged piston ring cavity lower surface, the high pressure servo oil in pressure communication channel starts to pass sequentially through
Oil spout window, charged piston ring cavity, servo oil oil return window flow into the main oil return line of servo oil and finally flow back to servo fuel tank；Work as Sheng
When heavy oil pressure in oil groove is greater than needle valve spring and the resultant force of the intracavitary servo oil pressure of noticeable degree, needle-valve is lifted, and contains oil
Pressurized heavy oil in slot enters injection channel and sprays from spray orifice, and charged piston is located at the second position at this time；
After the fuel oil of desired amount is injected into cylinder, electromagnetic valve coil power-off, valve rod is in magnetic valve spring
The connection for cutting off lower part ring cavity and intermediate ring cavity with the upper end face contact of fuel injector intermediate again is moved down under effect, and same
When be connected to top ring cavity with intermediate ring cavity, the high pressure servo oil acted on charged piston upper surface passes sequentially through connection and leads to
Road, intermediate ring cavity, top ring cavity, servo oil oil return branch, the main oil return line of servo oil, servo oil oil return pipeline flow back to servo oil
Case, charged piston move up under the action of oil pressure in charged piston spring, booster cavity, and charged piston is first shut off oil spout window at this time
Mouthful, pressurization window is then opened, heavy oil flows into pressurization oil duct along low pressure chamber, pressurization window at this time, i.e., to pressurization oil duct, pressurization
Heavy oil is supplemented in chamber, oil holding slot.
Present invention has an advantage that the present invention using charged piston 57 move up and down and meanwhile realize heavy oil pressurization and combustion
Needle control chamber decompression function needed for oil spurts, the oil circuit quantity arranged needed for reducing, so that fuel injector 17 is compact-sized,
Smaller compared to general band supercharging device fuel injector volume, weight is lighter.In addition, the characteristics of using heavy oil for fuel injector, especially
Heavy oil is pressurized using servo oil, and is designed in fuel injector with fuel system for possible oil leak problem
There is a set of miscella oil return line, the effective protection safety of fuel injector magnetic system also improves the reliability of fuel system.Heavy oil
Fuel injector is directly entered with low pressure, it may not be necessary to additional booster pump be set outside engine and be pressurized to heavy oil, saved
Complete machine expense.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural representation of fuel injector；
Fig. 3 is fuel injector top view；
Fig. 4 is the face A-A cross-sectional view；
Fig. 5 is electromagnetic valve component schematic diagram；
Fig. 6 is supercharger assembly schematic diagram；
Fig. 7 is supercharger assembly and servo oil oil return line structural schematic diagram；
Fig. 8 is pintle nozzle match-ing parts 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. 1-8, present invention intensified electric control fuel oil jet system peculiar to vessel, mainly by servo fuel tank 1, miscella
Oil sump tank 2, low-lift pump 4, high-pressure pump 5, servo oil oil return pipeline 7, servo oil common rail pipe 11, ECU13, heavy oil oil transfer pump 15, spray
The composition such as oily device 17, miscella oil return pipeline 18, heavy oil fuel tank 19.Servo fuel tank 1, low-lift pump 4, high-pressure pump 5 by pipeline by
Secondary to be connected, high-pressure pump 5 is connect with servo oil common rail pipe 11.Fuel injector 17 and servo oil common rail pipe 11, servo oil oil return pipeline 7,
The outlet of miscella oil return pipeline 18 and heavy oil oil transfer pump 15 connects.Miscella oil return pipeline 18 connects miscella oil sump tank 2,
Servo oil oil return pipeline 7 connects servo fuel tank 1, and heavy oil oil transfer pump 15 connects heavy oil fuel tank 19.ECU13 controls high-pressure pump 5 and spray
Oily device 17.
Fuel injector 17, mainly by the cover 21, fuel injector upper body 22, electromagnetic valve component 23, fuel injector intermediate 24, booster
The composition such as component 25, pintle nozzle match-ing parts 26, tight cap 27, sleeve 28, retaining ring 29, nozzle 30.Electromagnetic valve component 23 is on fuel injector
Among body 22, the cover 21 is connect by screw thread with fuel injector upper body 22.22 lower part of fuel injector upper body is sequentially arranged among fuel injector
Body 24, supercharger assembly 25, pintle nozzle match-ing parts 26 are simultaneously fastened by tight cap 27 with fuel injector upper body 22.Sleeve 28 compresses nozzle 30
In 26 lower end of pintle nozzle match-ing parts, sleeve 28 is fixed on tight cap 27 by retaining ring 29.
Electromagnetic valve component 23 is mainly by end cap 32, bracket 33, iron core 34, coil 35, armature 36, valve rod 37, solenoid valve bullet
The composition such as spring 48.37 lower part of valve rod is mounted among fuel injector intermediate 24, and top is mounted among fuel injector upper body 22.Valve rod
It is respectively formed lower part ring cavity 42, top ring cavity 44 between 37 and fuel injector intermediate 24, fuel injector upper body 22, is also formed between three
Intermediate ring cavity 43, moving up and down for valve rod 37 can control intermediate ring cavity 43 and lower part ring cavity 42 and intermediate ring cavity 43 and top
On-off between ring cavity 44.
Supercharger assembly is made of fuel injector lower body 56, charged piston 57, charged piston spring 61.Charged piston 57 is installed
Among fuel injector lower body 56, low pressure chamber 58 and booster cavity 59 are formed between the two.Be provided on fuel injector lower body 56 oil spout window 54,
It is pressurized window 69, oil entered window 68, servo oil oil return window 71, these windows are by one and the ring of fuel injector center line bias
The hole that slot is connected to the annular groove and other oil ducts with one forms.Oil entered window 68 is connected to low pressure chamber 58 and heavy oil oil input channel 66, watches
It takes oily oil return window 71 to be connected to the main oil return line 74 of servo oil, 59 fluid pressure of booster cavity moves down with charged piston 57 and will occur
Variation.Pressurization oil duct 70 and pressure communication channel 52 are additionally provided on fuel injector lower body 56, the former and booster cavity 59 and pressurization window
69 connections, the latter are connected to oil spout window 54 and needle control chamber 79.Be provided on charged piston 57 annular groove and under fuel injector
Body 56 forms charged piston ring cavity 64, and charged piston ring cavity 64 passes through servo oil oil return window 71 and the main oil return of fuel injector servo oil
Road 74 is connected to, and permanent in charged piston ring cavity 64 is low pressure servo oil.Charged piston 57 can be transported up and down in fuel injector lower body 56
It is dynamic, pressurization window 69 and oil spout window 54 will be opened or closed, to complete the movement of fuel pressurization and injection.
Pintle nozzle match-ing parts are made of needle-valve 82 and needle-valve body 83.Needle-valve 82 is mounted in needle-valve body 83, needle-valve body 83 and oil spout
Needle control chamber 79 is formed between device lower body 56, needle valve spring 80 is installed above needle-valve 82, needle valve spring 80 is located at needle-valve control
Among chamber 79 processed, needle control chamber 79 is connected to pressure communication channel 52.83 end of needle-valve body is spherical and is provided with through-hole.Needle-valve
Body 83 is equipped with oil holding slot 85, the Fluid pressure and needle valve spring 80 in 85 fluid pressure of oil holding slot and needle control chamber 79
The relative size of resultant force by determine needle-valve 82 whether lift, i.e., decision fuel injector whether oil spout.
Fuel injector 17 is pressurized using servo oil to heavy oil, in the fuel injector upper body 22, fuel injector intermediate 24, fuel injector
Duct composition servo oil in-line, servo oil oil return line, heavy oil in-line, miscella oil return line are provided on lower body 56.Servo
Oily in-line includes high pressure oil input channel 38, pressurization oil input channel 39, pressure communication channel 52；Servo oil oil return line includes servo oil master
Oil return line 74, servo oil oil return branch 73, servo oil communicating passage 72；Heavy oil in-line includes heavy oil oil input channel 66, pressurised oil
Road 70.Miscella oil return line includes miscella back oil road 60, miscella oil road 92.The fuel injector 17 is in fuel injector lower body 56
On open up miscella oil trap 80 and miscella oil outlet 62, it is fuel-displaced that 88 miscella of miscella oil trap is opened up on needle-valve body 87
Road 92 to the leakage for collecting servo oil and heavy oil, and is discharged by miscella back oil road 60.
In 17 course of work of fuel injector, coil 35 be powered when among ring cavity 43 be connected to lower part ring cavity 42 and and top loop
Chamber 44 separates.Charged piston 57 is acted on from initial position by high pressure servo oil and being moved down, and pressurization window 69 is first shut off, in the case where continuing
The heavy oil in booster cavity 59, pressurization oil duct 70 and oil holding slot 85 is pressurized during shifting.Meanwhile continuing in folding process and then
Oil spout window 54 is opened, the oil pressure in needle control chamber 79 is reduced, when pressure is greater than in needle control chamber 79 in oil holding slot 85
When pressure and the resultant force of needle valve spring 80, needle-valve 82 is lifted, and the pressurized heavy oil in oil holding slot 85 is sprayed by spray orifice 88.Line
When 35 power-off of circle, intermediate ring cavity 43 is connected to top ring cavity 44 and separates with lower part ring cavity 42, and the stopping of charged piston 57 moves down simultaneously
Start to move up, be first shut off oil spout window 54, and then opens pressurization window 69.After being pressurized the unlatching of window 69, from fuel tank
Low pressure heavy oil will be supplemented into the regions such as oil holding slot 85, booster cavity 59.Oil pressure reduces in oil holding slot 85 during this, needle-valve 82
Holding is taken a seat, fuel injector not oil spout, until charged piston returns to initial position, waits the beginning of subsequent work circulation.
As shown in Figure 1, present invention intensified electric control fuel oil jet system peculiar to vessel is mainly by servo fuel tank 1, miscella
Oil sump tank 2, low-lift pump 4, high-pressure pump 5, servo oil oil return pipeline 7, servo oil common rail pipe 11, ECU13, heavy oil oil transfer pump 15, spray
The composition such as oily device 17, miscella oil return pipeline 18, heavy oil fuel tank 19.Servo fuel tank 1, low-lift pump 4, high-pressure pump 5 by pipeline by
It is secondary to be connected, filter 3 is provided between servo fuel tank 1 and low-lift pump 4.High-pressure pump 5 and servo oil common rail pipe 11 pass through high pressure oil
Pipe 6 connects, and 11 both ends of servo oil common rail pipe are respectively provided with pressure limiting valve 8 and pressure sensor 12.Servo oil common rail pipe 11 is equipped with 6
A outlet is connect with 6 fuel injectors 17 respectively, pressure oscillation when servo oil common rail pipe 11 plays a part of pressure accumulation and reduces oil spout.
Fuel injector 17 is also connected with servo oil oil return pipeline 7, miscella oil return pipeline 18 in addition to connecting with servo oil common rail pipe 11.Separately
Outside, fuel injector 17 is also connected with the outlet of heavy oil oil transfer pump 15, and heavy oil oil transfer pump 15 connects heavy oil fuel tank 19, goes back among the two pipeline
It is provided with filter 16.ECU13 is connect with pressure sensor 12, and controls route 9, fuel injector control route 14 by high-pressure pump
High-pressure pump 5 and fuel injector 17 are connected, to control the two.
Fuel injector 17 is mainly by the cover 21, fuel injector upper body 22, electromagnetic valve component 23, fuel injector intermediate 24, booster
The composition such as component 25, pintle nozzle match-ing parts 26, tight cap 27, sleeve 28, retaining ring 29, nozzle 30.As shown in Fig. 2, electromagnetic valve component 23 fills
Among fuel injector upper body 22, the cover 21 is connect by screw thread with fuel injector upper body 22.22 lower part of fuel injector upper body is sequentially arranged with
Fuel injector intermediate 24, supercharger assembly 25, pintle nozzle match-ing parts 26 simultaneously pass through screw-threaded coupling with fuel injector upper body 22 through tight cap 27.Set
Nozzle 30 is pressed on the lower end of pintle nozzle match-ing parts 26 by cylinder 28, and sleeve 28 is fixed on tight cap 27 by retaining ring 29.
Electromagnetic valve component 23 is by sealing ring 31, end cap 32, bracket 33, iron core 34, coil 35, armature 36, valve rod 37, electromagnetism
The composition such as valve spring 48.As shown in figure 5, iron core 34 is fixed on bracket 33 and is mounted among fuel injector upper body 22 together.Valve
37 one end of bar is mounted among fuel injector intermediate 24, and the other end is mounted in fuel injector upper body 22, and installation site matches at two
Close gap all very littles.Lower part ring cavity 42 and pressure-releasing chamber 40 are formed between valve rod 37 and fuel injector intermediate 24, with fuel injector upper body
Top ring cavity 44 is formed between 22, also forms intermediate ring cavity 43 between three.Offer transverse holes and longitudinal hole among valve rod 37, two
Person constitutes pressure release passage 45, and pressure release passage 45 is connected to pressure-releasing chamber 40 and top ring cavity 44.It is fuel-displaced that 37 top of valve rod is additionally provided with circulation
Hole 46, circulation oil outlet 46 are connected to pressure release passage 45.Valve rod 37 is connect by retaining ring with armature 36.37 upper end of valve rod is equipped with
Magnetic valve spring 48,48 other end of magnetic valve spring are located in the bore of end cap 32, are also devised with adjustment gasket 49 between the two.
Sealing ring 31 is installed between end cap 32 and fuel injector upper body 22, and compresses and limits eventually by the cover 21.37 stress of valve rod can
It moves up and down, to control the on-off of intermediate ring cavity 43 and lower part ring cavity 42, top ring cavity 44.It is intermediate when position shown in Fig. 5
Ring cavity 43 is connected to top ring cavity 44 and separates with lower part ring cavity 42.Be additionally provided on fuel injector intermediate 24 high pressure oil input channel 38 with
It is pressurized oil input channel 39, wherein pressurization oil input channel 39 is connected with lower part ring cavity 42.
Supercharger assembly 25 is made of fuel injector lower body 56, charged piston 57, charged piston spring 61.As shown in fig. 6, increasing
Pressure piston 57 is mounted among fuel injector lower body 56, fit clearance very little between the two.61 one end of charged piston spring and spray
Oily device lower body 56 is in contact, and the other end is contacted with charged piston 57, and fuel injector assembles rear charged piston spring 61 to pre-tighten shape
State.Low pressure chamber 58 and booster cavity 59 are formed between charged piston 57 and fuel injector lower body 56.It is opened in 57 big end outer circle of charged piston
There is a slot, forms charged piston ring cavity 64 between the slot and fuel injector lower body 56.Fuel injector lower body 56 is equipped with miscella oil-collecting
Slot 55, and being equipped with miscella oil outlet 62 connects the miscella back oil road 60 on miscella oil trap 55 and fuel injector lower body 56
It is logical.Oil spout window 54 is equipped with above miscella oil trap 55, by being connected to the annular groove of fuel injector center line bias and one
The hole of the annular groove and other oil ducts is constituted, and oil spout window 54 is connected to pressure communication channel 52, and pressure communication channel 52 is located at spray
It on oily device lower body 56, is connected to the high pressure oil input channel 38 in Fig. 5, is equipped with meter in hole 51 between the two, constitute oil spout window 54
Hole diameter be greater than meter in hole 51 diameter.
Other two sets of oil circuits are also devised on the circumferential surface of fuel injector 17.As shown in fig. 7, fuel injector upper body 22, fuel injector
Duct composition heavy oil oil input channel 66 is machined on intermediate 24 and fuel injector lower body 56.It is similar with oil spout window 54, under fuel injector
It is additionally provided with oil entered window 68 on body 56, is pressurized window 69 and servo oil oil return window 71, wherein oil entered window 68 and heavy oil
Oil input channel 66 is connected to, and pressurization window 69 is connected to, servo oil oil return window 71 with pressurization oil duct 70 (being located on fuel injector lower body 56)
It is connected to by servo oil communicating passage 72 with the main oil return line 74 of servo oil.From Fig. 7 it can also be seen that also being set on fuel injector upper body 22
There is servo oil oil return branch 73, servo oil oil return branch 73 is connected to top ring cavity 44 and the main oil return line 74 of servo oil.In electricity
Magnet valve installation region is additionally provided with meter out hole 75 and is connected to the main oil return line of servo oil.In addition, from fig. 4, it can be seen that in Fig. 7
Pressurization oil duct 70 is connected to booster cavity 59.
Pintle nozzle match-ing parts 26 are made of needle-valve 82 and needle-valve body 83.As shown in figure 8, needle-valve 82 is mounted in needle-valve body 83, needle
Needle control chamber 79 is formed between valve body 83 and fuel injector lower body 56, pressure communication channel 52 is connected to needle control chamber 79.Needle
Valve spring 80 is mounted in needle control chamber 79, and it is Pre strained state that fuel injector, which assembles rear needle valve spring 80, and needle-valve 82 is by needle
The downward active force of valve spring 80 is equipped with adjustment gasket 81 between needle-valve 82 and needle valve spring 80.83 end of needle-valve body is spherical
And it is provided with through-hole, and it is additionally provided with miscella oil trap 84, it is similar to the miscella oil trap 55 in Fig. 6 on fuel injector lower body 56, it uses
In the miscella for collecting heavy oil and servo oil, miscella oil road 92 is connected to miscella oil trap 84 and miscella back oil road 60.
It is also provided with oil holding slot 85 on needle-valve body 83, is readily apparent oil holding slot 85 from Fig. 4 and is connected to pressurization oil duct 70.In needle control chamber 79
Fuel pressure and the relative size of resultant force and the fuel pressure in oil holding slot 85 of needle valve spring 80 will determine the lift of needle-valve 82
It rises and takes a seat, nozzle 30 is mounted on needle-valve body 83 by sleeve 28, and nozzle seat surface 90 contacts realization week with needle-valve body spherical surface 87
To sealing.Nozzle 30 is equipped with injection channel 89, and when needle-valve 82 lifts, the fuel oil in oil holding slot 85 enters injection channel 89 simultaneously
Cylinder is sprayed by spray orifice 88.
Illustrate the course of work of present invention intensified electric control fuel oil jet system peculiar to vessel in conjunction with Fig. 1~8 below:
The present invention gives heavy oil to be pressurized using servo oil, as shown in Figure 1, servo oil in servo fuel tank 1 through cleaner 3,
After low-lift pump 4 again by high-pressure pump 5 boost after through high-pressure oil pipe 6 be sent into servo oil common rail pipe 11, then by servo oil common rail pipe 11 into
Enter fuel injector 17.Pressure limiting valve 8 ensures common rail pipe safety more than pressure release when setting limit value in common rail overpressure；Pressure sensor
12 for monitoring pressure condition in servo oil common rail pipe 11, and ECU13 collects pressure in servo oil common rail pipe 11, plus being in figure
The information such as the engine speed, the load that show are right by high-pressure pump control route 9, fuel injector control route 14 after integrated treatment
High-pressure pump 5 and fuel injector 17 are controlled.Heavy oil in heavy oil fuel tank 19 filters through filter 16 and increases through heavy oil oil transfer pump 15
Fuel injector 17 is fed after pressure, it should be noted that it is not high through the pressurized heavy oil pressure of heavy oil oil transfer pump 15, much smaller than through height
The pressurized servo oil of press pump 5, it is believed that be low pressure oil.Miscella oil return pipeline 18 is used to collect the mixing of servo oil and heavy oil
Oil, and uniformly collect into miscella oil sump tank 2.Servo oil oil return pipeline 7 is used for the servo oil oil return of fuel injector 17.
Fuel injector 17 is configured with four oil circuits altogether, respectively servo oil in-line, servo oil oil return line, heavy oil in-line with
And miscella oil return line.Servo oil in-line includes high pressure oil input channel 38, pressurization oil input channel 39, pressure communication channel 52；Servo
Oily oil return line includes the main oil return line 74 of servo oil, servo oil oil return branch 73, servo oil communicating passage 72；Heavy oil in-line includes
Heavy oil oil input channel 66, pressurization oil duct 70；Miscella oil return line includes miscella back oil road 60, miscella oil road 92.Below according to
Secondary explanation.
High pressure servo oil from servo oil common rail pipe 11 enters fuel injector 17 from servo oil oil inlet shown in Fig. 2, warp
Fuel injector upper body 22 is crossed, in the punishment of fuel injector intermediate 24 at two parts, a part arrives at lower loop via pressurization oil input channel 39
Chamber 42, another part enter pressure communication channel 52 after flowing through meter in hole 51 and flow into needle-valve by high pressure oil input channel 38
Control chamber 79.The oil return opening of servo oil shown in Fig. 4 connects servo oil oil return pipeline 7, for from the low pressure servo of servo fuel tank 1 oil.By
It is connected to by servo oil oil return branch 73 with the main oil return line 74 of servo oil in top ring cavity 44, charged piston ring cavity 64 passes through servo
Oily oil return window 71, servo oil communicating passage 72 are connected to the main oil return line 74 of servo oil, therefore top ring cavity 44 and booster piston ring
It is low pressure servo oil in chamber 64.In addition, the servo oil of low pressure by pressure release passage 45, recycles oil outlet by top ring cavity 44
46 flow into solenoid valve installation region, then flow back to servo oil oil return opening through meter out hole 75, thus circulate always, Ke Yiwei
Solenoid valve heat dissipation in work.And the servo oil of 42 mesohigh of lower part ring cavity, will along valve rod 37 and fuel injector intermediate 24 it
Between gap small amount of leakage enter pressure-releasing chamber 40, equally flow back out servo oil oil return opening through circulation oil outlet 46, meter out hole 75.
Enter fuel injector from the heavy oil of heavy oil oil transfer pump 15 from heavy oil oil inlet shown in Fig. 4, through heavy oil oil input channel 66 with
Oil entered window 68 enters low pressure chamber 58, and noted above, the heavy oil into fuel injector is low pressure, then in low pressure chamber 58
Oil pressure is low pressure.
When original state, 35 no power of electromagnetic valve coil, valve rod 37 is pressed in spray under the action of the power of magnetic valve spring 48
On the upper surface of oily device intermediate 24, flat seal is realized with fuel injector intermediate 24.Intermediate ring cavity 43 and lower part ring cavity at this time
42 separate and are connected to top ring cavity 44, and low pressure servo oil acts on charged piston upper surface 65 through communicating passage 41 at this time.
Because the Fluid pressure acted in low pressure chamber 58 and charged piston upper surface 65 at this time is low pressure, in the power of charged piston spring 61
Under the action of, charged piston 57 is located at uppermost position, and top is contacted with fuel injector intermediate 24.We claim to be pressurized work at this time
Plug 57 is located at initial position.In initial position, charged piston ring cavity lower surface 63 is higher than oil spout upper window edge on axial position
Face 53, i.e., charged piston ring cavity 64 is not connected to pressure communication channel 52 at this time.Also, the charged piston shoulder face in initial position
It is higher than the lower along face of the slot of pressurization window 69 on 67 axial positions, i.e. low pressure chamber 58 is connected to pressurization oil duct 70.Increasing is mentioned before
Pressure oil road 70 is connected to booster cavity 59, and is connected to oil holding slot 85.Therefore in the initial state booster cavity 59, pressurization oil duct 70, contain
It is low pressure heavy oil in oil groove 85.
It is high pressure servo oil in needle control chamber 79 by preceding described it is found that when charged piston 57 is located at initial position,
Under the action of the spring force of servo oil pressure and needle valve spring 80, the face of needle seating 86 of needle-valve 82 and the needle-valve housing of needle-valve body 83
Linear sealing is realized in the contact of face 91, prevents oil holding slot 85 from being connected to injection channel 89, fuel injector not oil spout at this time.
When ECU13 control electromagnetic valve coil 35 is powered, armature 36 is moved up by electromagnetic force, and move up with ovable valve stem 37 so that
Valve rod 37 is contacted with fuel injector upper body 22 realizes linear sealing to cut off the connection of intermediate ring cavity 43 and top ring cavity 44；It is same with this
When, valve rod 37 moves up so that lower part ring cavity 42 is connected to intermediate ring cavity 43.High pressure servo oil is acted on by communicating passage 41
On charged piston upper surface 65, since fluid is low pressure in moment low pressure chamber 58 before, booster cavity 59, then charged piston 57
The spring force of charged piston spring 61 is overcome to move down under the action of high pressure servo is oily.Charged piston shoulder face first in folding process
67 cover in pressurization window 69, that is, have cut off low pressure chamber 58 and be pressurized the connection of oil duct 70.Then oil duct 70, booster cavity are pressurized
59, oil holding slot 85 etc. constitutes an enclosure space, and charged piston 57, which continues to move down, to compress the heavy oil in the enclosure space, i.e.,
Heavy oil in the space is pressurized, then the heavy oil oil pressure in oil holding slot 85 increases.
Charged piston 57 continues to move down, and when oil spout window 54 is opened in charged piston ring cavity lower surface 63, pressure communication is logical
High pressure servo oil in road 52 starts to pass sequentially through oil spout window 54, charged piston ring cavity 64, the inflow of servo oil oil return window 71
The main oil return line 74 of servo oil simultaneously finally flows back to servo fuel tank 1.When charged piston 57 moves down into certain position, due to oil spout window
The diameter of 54 flow-out hole is greater than the diameter in meter in hole 51, so the servo oil stream output in pressure communication channel 52 is greater than
Influx from meter in hole 51, so that servo oil pressure reduces in pressure communication channel 52, then in needle control chamber 79
Pressure also reduce.In other words, moving down with charged piston 57, the pressure rise of fluid in one side oil holding slot 85, separately
Fluid pressure in one side needle control chamber 79 reduces, when the heavy oil pressure in oil holding slot 85 is greater than needle valve spring 80 and needle-valve
When the resultant force of the servo oil pressure in control chamber 79, needle-valve 82 is lifted, i.e., face of needle seating 86 and needle valve seat' s cone 91 are detached from, and contains oil
Pressurized heavy oil in slot 85 enters injection channel 89 and sprays from spray orifice 88, i.e., fuel injector commencement of fuel injection acts.We claim
When fuel injector oil spout, charged piston is located at the second position.
After the fuel oil of desired amount is injected into cylinder, ECU13 controls electromagnetic valve coil 35 and powers off, and valve rod 37 exists
Moved down under the action of magnetic valve spring 48 again with the upper end face contact of fuel injector intermediate 24 to cut off lower part ring cavity 42 with
The connection of intermediate ring cavity 43, and it is connected to top ring cavity 44 with intermediate ring cavity 43.Then charged piston upper surface is acted on
High pressure servo oil on 65 passes sequentially through communicating passage 41, intermediate ring cavity 43, top ring cavity 44, servo oil oil return branch 73, watches
The main oil return line 74 of clothes oil, servo oil oil return pipeline 7 flow back to servo fuel tank 1, and the oil pressure on charged piston upper surface 65 reduces, pressurization
Piston 57 will move up under the action of oil pressure in charged piston spring 61, booster cavity 59.Charged piston 57 will be first shut off at this time
Oil spout window 54, once oil spout window 54 is closed, the oil pressure in needle control chamber 79 by due to meter in hole 51 in a steady stream not
The entrance of disconnected high pressure servo oil and increase rapidly；And then charged piston will be opened and be pressurized window 69, and heavy oil will be along at this time
Low pressure chamber 58, pressurization window 69 flow into pressurization oil duct 70, i.e., to pressurization oil duct 70, booster cavity 59, the inner supplement heavy oil of oil holding slot 85.
Charged piston 57 moves up until pressure gradually reduces in oil holding slot 85 during opening pressurization window 69, even lower than from
The heavy oil oil pressure that fuel injector heavy oil entrance enters.In this way, the oil pressure in one side needle control chamber 79 is fast after the power-off of coil 35
Speed increases, and oil pressure quickly reduces in another aspect oil holding slot 85, the fuel injector constant compared to pressure in conventional oil holding slot, spray
The needle-valve 82 of oily device 17 will more rapidly take a seat, and it is more clear-cut that fuel injector shows as oil-break.
Charged piston 57 resets after an oil spout recycles, and instruction is waited to carry out oil spout next time.In addition, being worth pointing out
, charged piston ring cavity 64 all keeps being connected to servo oil oil return window 71 and fluid flow area in entire injection process
It is sufficiently large, to guarantee that pressure communication channel 52 vents in time with the high pressure servo oil in needle control chamber 79.
Due to being always low pressure servo oil in charged piston ring cavity 64, and in low pressure chamber 58 always it is low pressure heavy oil, in fuel injector
Use process in, two kinds of oil are likely to be bled by the circumferential gap between charged piston 57 and fuel injector lower body 56 pair
Square region, the hidden danger such as thus bring the oily contaminated or servo oilconsumption of servo big.Miscella oil trap is specially devised thus
55 import miscella back oil road 60 for collecting the oil of leakage, and by miscella oil outlet 62, then pass through miscella shown in Fig. 2
Oil return opening exports to the unified collection processing of miscella oil sump tank 2.Miscella oil trap 84 is also based on same consideration design,
It is heavy oil in oil holding slot 85 due to being servo oil in needle control chamber 79, miscella oil trap 84 will collect the leakage of the two
It is oily to be equally uniformly processed by the export of miscella back oil road 60.
Claims (5)
1. intensified electric control fuel oil jet system peculiar to vessel, it is characterized in that: including fuel injector, servo fuel tank, servo oil common rail
Pipe, heavy oil fuel tank,
The fuel injector includes fuel injector upper body, fuel injector intermediate, fuel injector lower body, electromagnetic valve component, supercharger assembly, needle
Valve coupling, oily device upper body, fuel injector intermediate and fuel injector lower body are arranged from top to bottom, opened up on fuel injector upper body servo oil into
Hydraulic fluid port, servo oil oil return opening, the main oil return line of servo oil, servo oil oil return branch, heavy oil oil inlet, high pressure oil input channel, servo oil
Main oil return line connection servo oil oil return opening and servo oil oil return branch, high pressure oil input channel are connected to servo oil oil inlet；
The electromagnetic valve component includes end cap, iron core, armature, valve rod, and the top of valve rod is arranged in fuel injector upper body, valve rod
Lower part stretches in fuel injector intermediate, and armature is fixed on the top of valve rod, and the chamber where armature is connected to meter out hole, oil return
Throttle orifice is connected to the main oil return line of servo oil, and iron core is arranged in the top of armature, and end cap, the middle part setting of iron core is arranged in the top of iron core
The both ends of magnetic valve spring, magnetic valve spring are withstood on end cap and valve rod respectively, wound around coil in iron core, on valve rod and fuel injector
Body forms top ring cavity, and valve rod and fuel injector intermediate form lower part ring cavity and pressure-releasing chamber, valve rod, fuel injector upper body, fuel injector
Intermediate ring cavity is formed between intermediate three, the transverse holes and longitudinal hole, transverse holes and longitudinal hole structure that stem internal setting communicates
At pressure release passage, setting is pressurized oil input channel, communicating passage, servo oil communicating passage in fuel injector intermediate, and pressurization oil input channel connects
Logical lower part ring cavity and high pressure oil input channel, communicating passage connection middle part ring cavity, servo oil communicating passage are connected to the main oil return line of servo oil,
Servo oil oil return branch is connected to top ring cavity；
The supercharger assembly includes charged piston, and charged piston is arranged in fuel injector lower body, be provided in fuel injector lower body into
Oily window, pressurization window, servo oil oil return window, pressurization oil duct, pressure communication channel, oil spout window, charged piston include big
Head end and small head end, microcephaly's end cap have charged piston spring, and the upper and lower ends of charged piston spring withstand on stub end and increasing respectively
On depressor lower body, booster cavity is formed between small head end and booster lower body below, charged piston spring position is low
Chamber is pressed, charged piston ring cavity is set in the middle part of stub end, servo oil oil return window is connected to servo oil communicating passage, pressurization oil duct difference
It is connected to booster cavity and pressurization window, oil entered window is connected to heavy oil oil input channel and low pressure chamber, charged piston upper surface and communicating passage
It communicates, pressure communication channel is connected to the main in-line of servo oil by meter in hole, and oil spout window is connected to pressure communication channel；
The pintle nozzle match-ing parts include needle-valve body, needle-valve, nozzle, and nozzle is located at below needle-valve body, needle-valve be located in needle-valve body and with
Oil holding slot is formed between needle-valve body, needle valve spring, needle valve spring position are protruded into fuel injector lower body and be cased in needle-valve top
For needle control chamber, needle control chamber is connected to pressure communication channel, and needle-valve body lower end is spherical and is provided with through-hole, needle-valve lower end
Portion is the face of needle seating with the spherical lower end cooperation of needle-valve body, opens up injection channel in nozzle, nozzle-end opens up spray orifice；
Heavy oil fuel tank is connected to the heavy oil oil inlet of fuel injector by filter, heavy oil oil transfer pump, and servo fuel tank passes through low-lift pump, height
The oil inlet of press pump, high-pressure oil pipe connection servo oil common rail pipe, the servo oil of the oil outlet connection fuel injector of servo oil common rail pipe
The oil return opening of oil inlet, servo oil common rail pipe is connected to servo fuel tank by pressure limiting valve, and the servo oil oil return opening connection of fuel injector is watched
Take fuel tank.
2. intensified electric control fuel oil jet system peculiar to vessel according to claim 1, it is characterized in that: further including miscella
Oil sump tank；Miscella oil return opening is set in fuel injector upper body, miscella back oil road, miscella back oil road are set in fuel injector lower body
It is connected to miscella oil return opening, the stub end of charged piston is machined with miscella oil trap, and miscella oil trap is gone out by miscella
Oilhole is connected to miscella back oil road；Miscella oil road and needle-valve miscella oil trap, miscella oil road are set in needle-valve body
It is respectively communicated with miscella back oil road and needle-valve miscella oil trap；
The miscella oil return opening of fuel injector is connected to miscella oil sump tank.
3. intensified electric control fuel oil jet system peculiar to vessel according to claim 1 or 2, it is characterized in that: oil spout window
Hole diameter be greater than meter in hole diameter.
4. intensified electric control fuel oil jet system peculiar to vessel according to claim 1 or 2, it is characterized in that: original state
When, electromagnetic valve coil no power, valve rod is pressed on the upper surface of fuel injector intermediate under the action of the power of magnetic valve spring, with
Fuel injector intermediate realizes flat seal, and intermediate ring cavity separates with lower part ring cavity and is connected to top ring cavity, low pressure servo at this time
Oil acts on charged piston upper surface through communicating passage；Charged piston is located at uppermost position, top among fuel injector
Body contact, is located at initial position at this time for charged piston, charged piston ring cavity lower surface is on axial position in initial position
Higher than oil spout upper window edge face, i.e. charged piston ring cavity is not connected to pressure communication channel, and charged piston shoulder face axial position
Upper to be higher than the lower along face of the slot for being pressurized window, i.e. low pressure chamber is connected to pressurization oil duct；When charged piston is located at initial position, needle
It is high pressure servo oil, under the action of the spring force of servo oil pressure and needle valve spring, the face of needle seating of needle-valve in valve control chamber
It is contacted with the needle valve seat' s cone of needle-valve body and realizes linear sealing, oil holding slot is prevented to be connected to injection channel；
When electromagnetic valve coil is powered, armature is moved up by electromagnetic force, and is moved up with ovable valve stem so that valve rod is contacted with fuel injector upper body
Linear sealing is realized to cut off the connection of intermediate ring cavity Yu top ring cavity；At the same time, valve rod move up so that lower part ring cavity with
Intermediate ring cavity connection, high pressure servo oil act on charged piston upper surface by communicating passage, and charged piston is in high pressure servo
The spring force of charged piston spring is overcome to move down under the action of oil, charged piston shoulder face covers in pressurization window first in folding process
Mouthful, that is, it has cut off low pressure chamber and has been pressurized the connection of oil duct, pressurization oil duct, booster cavity, oil holding slot constitute enclosure space, and pressurization is lived
Plug continues to move down the heavy oil compressed in the enclosure space, i.e., is pressurized to heavy oil in the space；Charged piston continues to move down, when
When oil spout window is opened in charged piston ring cavity lower surface, the high pressure servo oil in pressure communication channel starts to pass sequentially through oil spout window
Mouth, charged piston ring cavity, servo oil oil return window flow into the main oil return line of servo oil and finally flow back to servo fuel tank；When in oil holding slot
Heavy oil pressure when being greater than the resultant force of needle valve spring and the intracavitary servo oil pressure of noticeable degree, needle-valve lifts, in oil holding slot
Pressurized heavy oil enters injection channel and sprays from spray orifice, and charged piston is located at the second position at this time；
After the fuel oil of desired amount is injected into cylinder, electromagnetic valve coil power-off, effect of the valve rod in magnetic valve spring
Under move down again with the upper end face contact of fuel injector intermediate to cut off the connection of lower part ring cavity and intermediate ring cavity, and make simultaneously
Top ring cavity is connected to intermediate ring cavity, the high pressure servo oil acted on charged piston upper surface pass sequentially through communicating passage, in
Between ring cavity, top ring cavity, servo oil oil return branch, the main oil return line of servo oil, servo oil oil return pipeline flow back to servo fuel tank, be pressurized
Piston moves up under the action of oil pressure in charged piston spring, booster cavity, and charged piston is first shut off oil spout window at this time, then
It opens and is pressurized window, heavy oil flows into pressurization oil duct along low pressure chamber, pressurization window at this time, i.e., to pressurization oil duct, booster cavity, Sheng oil
Heavy oil is supplemented in slot.
5. intensified electric control fuel oil jet system peculiar to vessel according to claim 3, it is characterized in that: when original state,
Electromagnetic valve coil no power, valve rod is pressed on the upper surface of fuel injector intermediate under the action of the power of magnetic valve spring, with spray
Oily device intermediate realizes flat seal, and intermediate ring cavity separates with lower part ring cavity and is connected to top ring cavity at this time, low pressure servo oil
It is acted on charged piston upper surface through communicating passage；Charged piston is located at uppermost position, top and fuel injector intermediate
Contact, is located at initial position at this time for charged piston, and in initial position, charged piston ring cavity lower surface is high on axial position
In oil spout upper window edge face, i.e. charged piston ring cavity is not connected to pressure communication channel, and on the axial position of charged piston shoulder face
Lower along face higher than the slot of pressurization window, i.e. low pressure chamber is connected to pressurization oil duct；When charged piston is located at initial position, needle-valve
Be high pressure servo oil in control chamber, under the action of the spring force of servo oil pressure and needle valve spring, the face of needle seating of needle-valve with
Linear sealing is realized in the needle valve seat' s cone contact of needle-valve body, and oil holding slot is prevented to be connected to injection channel；
When electromagnetic valve coil is powered, armature is moved up by electromagnetic force, and is moved up with ovable valve stem so that valve rod is contacted with fuel injector upper body
Linear sealing is realized to cut off the connection of intermediate ring cavity Yu top ring cavity；At the same time, valve rod move up so that lower part ring cavity with
Intermediate ring cavity connection, high pressure servo oil act on charged piston upper surface by communicating passage, and charged piston is in high pressure servo
The spring force of charged piston spring is overcome to move down under the action of oil, charged piston shoulder face covers in pressurization window first in folding process
Mouthful, that is, it has cut off low pressure chamber and has been pressurized the connection of oil duct, pressurization oil duct, booster cavity, oil holding slot constitute enclosure space, and pressurization is lived
Plug continues to move down the heavy oil compressed in the enclosure space, i.e., is pressurized to heavy oil in the space；Charged piston continues to move down, when
When oil spout window is opened in charged piston ring cavity lower surface, the high pressure servo oil in pressure communication channel starts to pass sequentially through oil spout window
Mouth, charged piston ring cavity, servo oil oil return window flow into the main oil return line of servo oil and finally flow back to servo fuel tank；When in oil holding slot
Heavy oil pressure when being greater than the resultant force of needle valve spring and the intracavitary servo oil pressure of noticeable degree, needle-valve lifts, in oil holding slot
Pressurized heavy oil enters injection channel and sprays from spray orifice, and charged piston is located at the second position at this time；
After the fuel oil of desired amount is injected into cylinder, electromagnetic valve coil power-off, effect of the valve rod in magnetic valve spring
Under move down again with the upper end face contact of fuel injector intermediate to cut off the connection of lower part ring cavity and intermediate ring cavity, and make simultaneously
Top ring cavity is connected to intermediate ring cavity, the high pressure servo oil acted on charged piston upper surface pass sequentially through communicating passage, in
Between ring cavity, top ring cavity, servo oil oil return branch, the main oil return line of servo oil, servo oil oil return pipeline flow back to servo fuel tank, be pressurized
Piston moves up under the action of oil pressure in charged piston spring, booster cavity, and charged piston is first shut off oil spout window at this time, then
It opens and is pressurized window, heavy oil flows into pressurization oil duct along low pressure chamber, pressurization window at this time, i.e., to pressurization oil duct, booster cavity, Sheng oil
Heavy oil is supplemented in slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835504.3A CN109139316A (en) | 2018-07-26 | 2018-07-26 | Intensified electric control fuel oil jet system peculiar to vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835504.3A CN109139316A (en) | 2018-07-26 | 2018-07-26 | Intensified electric control fuel oil jet system peculiar to vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109139316A true CN109139316A (en) | 2019-01-04 |
Family
ID=64798963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810835504.3A Withdrawn CN109139316A (en) | 2018-07-26 | 2018-07-26 | Intensified electric control fuel oil jet system peculiar to vessel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109139316A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282997A (en) * | 2020-11-20 | 2021-01-29 | 中船动力研究院有限公司 | Oil sprayer and common rail fuel injection system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6050269A (en) * | 1983-08-27 | 1985-03-19 | Yanmar Diesel Engine Co Ltd | Servo piston controlling device for plunger |
| DE19621583A1 (en) * | 1995-06-06 | 1997-01-02 | Avl Verbrennungskraft Messtech | Diesel engine fuel injection system |
| US5954030A (en) * | 1994-12-01 | 1999-09-21 | Oded E. Sturman | Valve controller systems and methods and fuel injection systems utilizing the same |
| DE10335340A1 (en) * | 2003-08-01 | 2005-02-24 | Robert Bosch Gmbh | Control valve for a pressure injector containing fuel injector |
| CN104612873A (en) * | 2014-12-29 | 2015-05-13 | 沪东重机有限公司 | Heavy-oil high pressure common rail fuel injection system controlled by double solenoid valves and used for marine low-speed machine |
-
2018
- 2018-07-26 CN CN201810835504.3A patent/CN109139316A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6050269A (en) * | 1983-08-27 | 1985-03-19 | Yanmar Diesel Engine Co Ltd | Servo piston controlling device for plunger |
| US5954030A (en) * | 1994-12-01 | 1999-09-21 | Oded E. Sturman | Valve controller systems and methods and fuel injection systems utilizing the same |
| DE19621583A1 (en) * | 1995-06-06 | 1997-01-02 | Avl Verbrennungskraft Messtech | Diesel engine fuel injection system |
| DE10335340A1 (en) * | 2003-08-01 | 2005-02-24 | Robert Bosch Gmbh | Control valve for a pressure injector containing fuel injector |
| CN104612873A (en) * | 2014-12-29 | 2015-05-13 | 沪东重机有限公司 | Heavy-oil high pressure common rail fuel injection system controlled by double solenoid valves and used for marine low-speed machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282997A (en) * | 2020-11-20 | 2021-01-29 | 中船动力研究院有限公司 | Oil sprayer and common rail fuel injection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105508082B (en) | It is pressurized No leakage electromagnetic control type fuel gas ejecting device | |
| US5443209A (en) | High pressure diesel fuel injector for internal combustion engines | |
| CN104018965A (en) | Electromagnetic control pressure-storage and pressure-stabilizing oil sprayer | |
| CN106762291A (en) | A kind of board-like electric-controlled fuel injector of minute hand valve opening without static leakage | |
| CN105332835A (en) | Normally open type double-valve electronic control oil injection system for heavy oil | |
| CN109139316A (en) | Intensified electric control fuel oil jet system peculiar to vessel | |
| CN109236523A (en) | Intensified electric-controlled fuel injector peculiar to vessel | |
| CN105351130A (en) | Pressurization no-leakage piezoelectric control type gas injection device | |
| CN105332833A (en) | Normally-closed bivalve electronic-controlled fuel injection system for heavy oil | |
| CN100392229C (en) | Fuel supply system of internal combustion engine and internal combustion engine | |
| CN109236526A (en) | Pressure accumulation type bivalve electric-controlled fuel injector | |
| CN105756830B (en) | Combined mechanical oil spout-supercharging electromagnetism jet hybrid fuel jet device | |
| CN206753784U (en) | A kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch | |
| CN109681357B (en) | Pressure accumulation type double-valve electric control oil injector with variable oil injection law | |
| CN104533678A (en) | Marine low-speed diesel engine common-rail fuel injection system with external pressurization piston | |
| CN109252999B (en) | Piezoelectric-electromagnetic double-valve electric control oil injector | |
| CN109253003A (en) | The electric control fuel oil jet system of On Fluctuations oil return | |
| CN109162846B (en) | Pressure accumulation type piezoelectric-electromagnetic double-valve electric control oil injector with control cavity sliding block | |
| CN106523228A (en) | Fuel-injection electronic unit pump for low-power diesel generator | |
| CN109236525A (en) | Intensified piezoelectric fuel injector | |
| CN109162844A (en) | Intensified electric-controlled fuel injector | |
| CN205779392U (en) | The double supercharging electromagnetic fuel injection piezoelectricity jet hybrid fuel jet device of combination type | |
| CN109209709A (en) | Electric control fuel oil jet system with fluid power compensating piston | |
| CN109184990A (en) | Intensified On Fluctuations electric-controlled fuel injector peculiar to vessel | |
| CN109162845A (en) | Intensified piezoelectric fuel injector peculiar to vessel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190104 |
|
| WW01 | Invention patent application withdrawn after publication |