CN109236523A - Intensified electric-controlled fuel injector peculiar to vessel - Google Patents
Intensified electric-controlled fuel injector peculiar to vessel Download PDFInfo
- Publication number
- CN109236523A CN109236523A CN201810834560.5A CN201810834560A CN109236523A CN 109236523 A CN109236523 A CN 109236523A CN 201810834560 A CN201810834560 A CN 201810834560A CN 109236523 A CN109236523 A CN 109236523A
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- China
- Prior art keywords
- oil
- fuel injector
- servo
- valve
- needle
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The purpose of the present invention is to provide intensified electric-controlled fuel injectors peculiar to vessel, including fuel injector upper body, electromagnetic valve component, fuel injector intermediate, supercharger assembly, pintle nozzle match-ing parts, nozzle.Electromagnetic valve component is mounted in fuel injector upper body, and oil spout window, pressurization window, oil entered window, servo oil oil return window are provided on the fuel injector lower body of supercharger assembly.Pressurization window is connected to the oil holding slot of pintle nozzle match-ing parts, and oil spout window is connected to needle control chamber.It is provided with slot on the charged piston of supercharger assembly, and forms charged piston ring cavity with fuel injector lower body, charged piston ring cavity is connected to by servo oil oil return window with servo oil oil return line.Fuel injector is pressurized using servo oil to heavy oil, there also is provided miscella oil return line on fuel injector.Structure of the invention is compact, and oil circuit configuration is simple, and heavy oil can be used and can realize superhigh pressure jetting.
Description
Technical field
The present invention relates to a kind of diesel engines, specifically diesel fuel system.
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 still maintains a dominant position 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.
Fuel injector is one of kernel component of diesel fuel injection system.Super-pressure oil spout facilitates the atomization of fuel oil
With burning, marine diesel, in order to realize high-pressure injection, it is one of solution that supercharging device, which is arranged, in fuel injector, and only
Be only add supercharging device fuel injector will make fuel injector structure is elongated, weight increase it is many.
Moreover, for economical reasons, marine diesel has suitable accounting heavy oil combustion, electric-controlled fuel injector is come
Say, heavy oil must be made with solenoid valve and be effectively isolated, and if only increase isolating device, will be so that fuel injector size be further
It lengthens；Moreover, will inevitably increase oil circuit.
Summary of the invention
The purpose of the present invention is to provide be able to achieve pressurization in fuel injector and can be made using heavy oil, suitable marine diesel
Intensified electric-controlled fuel injector peculiar to vessel.
The object of the present invention is achieved like this:
Present invention intensified electric-controlled fuel injector peculiar to vessel, it is characterized in that: include fuel injector upper body, fuel injector intermediate,
Fuel injector lower body, electromagnetic valve component, supercharger assembly, pintle nozzle match-ing parts, fuel injector upper body, fuel injector intermediate and fuel injector lower body
It is arranged from top to bottom, servo oil oil inlet, high pressure oil input channel, servo oil oil return opening, servo oil master time is set in fuel injector upper body
Oil circuit, servo oil oil return branch, heavy oil oil inlet, heavy oil oil input channel, high pressure oil input channel are connected to servo oil oil inlet, servo oil master
Oil return line is respectively communicated with servo oil oil return opening and servo oil oil return branch, and heavy oil oil input channel is connected to heavy oil oil input channel；
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 the main oil return line of servo oil is respectively communicated with servo oil
Oil return branch and servo oil communicating passage, 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, servo oil oil return window, pressurization window, pressurization oil duct, oil spout window, pressure communication channel, 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 oil entered window is connected to heavy oil oil input channel, the connection of servo oil oil return window
Servo oil communicating passage, pressurization oil duct are respectively communicated with pressurization window and booster cavity, and pressure communication channel is connected to oil spout window, and leads to
Cross meter in hole connection high pressure oil input channel；
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.
The present invention may also include:
1, miscella oil return opening is set in fuel injector upper body, miscella back oil road is set in fuel injector lower body, miscella returns
Oil duct is connected to miscella oil return opening, and the stub end of charged piston is machined with miscella oil trap, and miscella oil trap passes through mixing
Oily oil outlet is connected to miscella back oil road；Miscella oil road is set in needle-valve body and needle-valve miscella oil trap, miscella go out
Oil duct is respectively communicated with miscella back oil road and needle-valve miscella oil trap.
2, 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,
Charged piston is located at initial position at this time, and top is contacted with fuel injector intermediate, in initial position under charged piston ring cavity
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 at this time, 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；Noticeable degree
Intracavitary 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 and needle-valve of needle-valve
Linear sealing is realized in the needle valve seat' s cone contact of 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 on valve rod and fuel injector
Body contact realizes linear sealing to cut off the connection of intermediate ring cavity Yu top ring cavity；Valve rod moves up so that lower part ring cavity and centre
Ring cavity connection, high pressure servo oil act on charged piston upper surface by communicating passage, and charged piston is in high pressure servo oil
The spring force of charged piston spring is overcome to move down under effect, charged piston shoulder face covers in pressurization window first in folding process,
It has cut off low pressure chamber and has been pressurized the connection of oil duct, pressurization oil duct, booster cavity, oil holding slot etc. constitute enclosure space, charged piston
Continue to move down the heavy oil compressed in the enclosure space；Charged piston continues to move down, when oil spout is opened in charged piston ring cavity lower surface
When window, the high pressure servo oil in pressure communication channel passes sequentially through oil spout window, charged piston ring cavity, servo oil oil return window
It flows into the main oil return line cocurrent of servo oil and postbacks motivation servo fuel tank, when the heavy oil pressure in oil holding slot is greater than needle valve spring and needle-valve
When the resultant force of the servo oil pressure in control chamber, needle-valve is lifted, and the heavy oil in oil holding slot enters injection channel and sprays from spray orifice,
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 flow back to engine servo fuel tank, charged piston
It is moved up under the action of oil pressure in charged piston spring, booster cavity, charged piston is first shut off oil spout window at this time, is then pressurized
Piston, which is opened, is pressurized window, and heavy oil flows into pressurization oil duct along low pressure chamber, pressurization window, i.e., to pressurization oil duct, booster cavity, Sheng oil
Heavy oil is supplemented in slot.
Present invention has an advantage that the present invention using charged piston 37 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 entire fuel injector structure is tight
It gathers, smaller compared to general band supercharging device fuel injector volume, weight is lighter.In addition, the characteristics of using heavy oil for fuel injector, special
Not Cai Yongliao servo oil heavy oil is pressurized, and devise a set of miscella oil return line for possible oil leak problem,
The effective protection safety of solenoid valve, improves the reliability of fuel injector.Heavy oil directly enters fuel injector with low pressure, it may not be necessary to
Additional booster pump is arranged outside engine to be pressurized heavy oil, saves complete machine expense.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is top view of the invention；
Fig. 3 is A-A view；
Fig. 4 is electromagnetic valve component structural schematic diagram；
Fig. 5 is supercharger assembly structural schematic diagram；
Fig. 6 is supercharger assembly and servo oil oil return line structural schematic diagram；
Fig. 7 is needle valve assembly structural 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. 1-7, intensified electric-controlled fuel injector peculiar to vessel of the invention, mainly by the cover 1, fuel injector upper body 2, electricity
The composition such as electromagnetic valve component 3, fuel injector intermediate 4, supercharger assembly 5, pintle nozzle match-ing parts 6, tight cap 7, sleeve 8, retaining ring 9, nozzle 10.
Among fuel injector upper body 2, the cover 1 is connect by screw thread with fuel injector upper body 2 electromagnetic valve component 3.2 lower part of fuel injector upper body
It is sequentially arranged with fuel injector intermediate 4, supercharger assembly 5, pintle nozzle match-ing parts 6 and tight by screw thread through tight cap 7 and fuel injector upper body 2
Gu.Nozzle 10 is pressed on 6 lower end of pintle nozzle match-ing parts by sleeve 8, and sleeve 8 is fixed on tight cap 7 by retaining ring 9.
Electromagnetic valve component 3 is mainly by end cap 12, bracket 13, iron core 14, coil 15, armature 16, valve rod 17, magnetic valve spring
28 equal compositions.17 lower part of valve rod is mounted among fuel injector intermediate 4, and top is mounted among fuel injector upper body 2.Valve rod 17 with
It is respectively formed lower part ring cavity 22, top ring cavity 24 between fuel injector intermediate 4, fuel injector upper body 2, also forms intermediate ring between three
Chamber 23, moving up and down for valve rod 17 can control intermediate ring cavity 23 and lower part ring cavity 22 and intermediate ring cavity 23 and top ring cavity 24
Between on-off.
Supercharger assembly is made of fuel injector lower body 36, charged piston 37, charged piston spring 41.Charged piston 37 is installed
Among fuel injector lower body 36, low pressure chamber 38 and booster cavity 39 are formed between the two.Be provided on fuel injector lower body 36 oil spout window 34,
It is pressurized window 49, oil entered window 48, servo oil oil return window 51, 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 48 is connected to low pressure chamber 38 and heavy oil oil input channel 46, watches
It takes oily oil return window 51 to be connected to the main oil return line 54 of servo oil, 39 fluid pressure of booster cavity moves down with charged piston 37 and will occur
Variation.Pressurization oil duct 50 and pressure communication channel 32 are additionally provided on fuel injector lower body 36, the former and booster cavity 39 and pressurization window
49 connections, the latter are connected to oil spout window 34 and needle control chamber 59.Charged piston includes at least two positions, is respectively sprayed
Second position when initial position when oily device not oil spout and oil spout.Be provided on charged piston 37 annular groove and with fuel injector lower body 36
Charged piston ring cavity 44 is formed, charged piston ring cavity 44 passes through servo oil oil return window 51 and the main oil return line 54 of fuel injector servo oil
It is connected to, permanent in charged piston ring cavity 44 is low pressure servo oil.Charged piston 37 can move up and down in fuel injector lower body 36, will
Pressurization window 49 and oil spout window 34 are opened or closed, to complete the movement of fuel pressurization and injection.
Pintle nozzle match-ing parts are made of needle-valve 62 and needle-valve body 63.Needle-valve 62 is mounted in needle-valve body 63, needle-valve body 63 and oil spout
Needle control chamber 59 is formed between device lower body 36, needle valve spring 60 is installed above needle-valve 62, needle valve spring 60 is located at needle-valve control
Among chamber 59 processed, needle control chamber 59 is connected to pressure communication channel 32.63 end of needle-valve body is spherical and is provided with through-hole.Needle-valve
Body 63 is equipped with oil holding slot 65, the Fluid pressure and needle valve spring 60 in 65 fluid pressure of oil holding slot and needle control chamber 59
The relative size of resultant force by determine needle-valve 62 whether lift, i.e., decision fuel injector whether oil spout.
Fuel injector is pressurized using servo oil to heavy oil, in the fuel injector upper body 2, fuel injector intermediate 4, fuel injector lower body
Duct composition servo oil in-line, servo oil oil return line, heavy oil in-line are provided on 36.Servo oil in-line include high pressure into
Oil duct 18, pressurization oil input channel 19, pressure communication channel 32；Servo oil oil return line includes the main oil return line 54 of servo oil, servo oil time
Oily branch 53, servo oil communicating passage 52；Heavy oil in-line includes heavy oil oil input channel 46, pressurization oil duct 50.It is used to solve pressurization
Servo oil and injection heavy oil leakage problem, the fuel injector has also been devised miscella oil return line, including miscella returns
Oil duct 40, miscella oil road 72.And miscella oil trap 60 and miscella oil outlet 42 are opened up on fuel injector lower body 36,
68 miscella oil road 72 of miscella oil trap is opened up on needle-valve body 67, to collect the leakage of servo oil and heavy oil, and is led to
Cross the discharge of miscella back oil road 40.
In the fuel injector course of work, coil 15 be powered when among ring cavity 23 be connected to lower part ring cavity 22 and with top ring cavity
24 partitions.Charged piston 37 is acted on from initial position by high pressure servo oil and being moved down, and is first shut off pressurization window 49, is being continued to move down
The heavy oil in booster cavity 39, pressurization oil duct 50 and oil holding slot 65 is pressurized in the process.Meanwhile continuing and then to beat in folding process
Oil spout window 34 is opened, the oil pressure in needle control chamber 59 is reduced, when pressure is greater than 59 internal pressure of needle control chamber in oil holding slot 65
When power and the resultant force of needle valve spring 60, needle-valve 62 is lifted, and the pressurized heavy oil in oil holding slot 65 is sprayed by spray orifice 68.Coil
When 15 power-off, intermediate ring cavity 23 is connected to top ring cavity 24 and separates with lower part ring cavity 22, and the stopping of charged piston 37 is moved down and opened
Beginning moves up, and is first shut off oil spout window 34, and then opens pressurization window 49.After being pressurized the unlatching of window 49, from the low of fuel tank
Ballast oil will be supplemented into the regions such as oil holding slot 65, booster cavity 39.Oil pressure reduces in oil holding slot 65 during this, and needle-valve 62 is protected
It holds and takes a seat, fuel injector not oil spout waits the beginning of subsequent work circulation until charged piston returns to initial position.
As shown in Figure 1, electromagnetic valve component 3, among fuel injector upper body 2, the cover 1 is connected by screw thread and fuel injector upper body 2
It connects.2 lower part of fuel injector upper body is sequentially arranged with fuel injector intermediate 4, supercharger assembly 5, pintle nozzle match-ing parts 6 and through tight cap 7 and oil spout
Device upper body 2 passes through screw-threaded coupling.Nozzle 10 is pressed on the lower end of pintle nozzle match-ing parts 6 by sleeve 8, and sleeve 8 is fixed on tight cap by retaining ring 9
On 7.
Electromagnetic valve component 3 is by sealing ring 11, end cap 12, bracket 13, iron core 14, coil 15, armature 16, valve rod 17, electromagnetism
The composition such as valve spring 28.As shown in figure 4, iron core 14 is fixed on bracket 13 and is mounted among fuel injector upper body 2 together.Valve rod
17 one end are mounted among fuel injector intermediate 4, and the other end is mounted in fuel injector upper body 2, at two between the cooperation of installation site
Gap all very littles.Lower part ring cavity 22 is formed between valve rod 17 and fuel injector intermediate 4 and between pressure-releasing chamber 20, with fuel injector upper body 2
Top ring cavity 24 is formed, also forms intermediate ring cavity 23 between three.Transverse holes and longitudinal hole are offered among valve rod 17, the two is constituted
Pressure release passage 25, pressure release passage 25 are connected to pressure-releasing chamber 20 and top ring cavity 24.17 top of valve rod is additionally provided with circulation oil outlet 26, follows
Ring oil outlet 26 is connected to pressure release passage 25.Valve rod 17 is connect by retaining ring with armature 16.17 upper end of valve rod is equipped with solenoid valve
Spring 28,28 other end of magnetic valve spring are located in the bore of end cap 12, are also devised with adjustment gasket 29 between the two.End cap 12
Sealing ring 11 is installed between fuel injector upper body 2, and compresses and limits eventually by the cover 1.17 stress of valve rod can move up and down,
To control the on-off of intermediate ring cavity 23 and lower part ring cavity 22, top ring cavity 24.When position shown in Fig. 4, intermediate ring cavity 23 with
Top ring cavity 24 is connected to and separates with lower part ring cavity 22.High pressure oil input channel 18 and pressurization oil inlet are additionally provided on fuel injector intermediate 4
Road 19, wherein pressurization oil input channel 19 is connected with lower part ring cavity 22.
Supercharger assembly 5 is made of fuel injector lower body 36, charged piston 37, charged piston spring 41.As shown in figure 5, increasing
Pressure piston 37 is mounted among fuel injector lower body 36, fit clearance very little between the two.41 one end of charged piston spring and spray
Oily device lower body 36 is in contact, and the other end is contacted with charged piston 37, and fuel injector assembles rear charged piston spring 41 to pre-tighten shape
State.Low pressure chamber 38 and booster cavity 39 are formed between charged piston 37 and fuel injector lower body 36.It is opened in 37 big end outer circle of charged piston
There is a slot, forms charged piston ring cavity 44 between the slot and fuel injector lower body 36.Fuel injector lower body 36 is equipped with miscella oil-collecting
Slot 35, and being equipped with miscella oil outlet 42 connects the miscella back oil road 40 on miscella oil trap 35 and fuel injector lower body 36
It is logical.Oil spout window 34 is equipped with above miscella oil trap 35, 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.Oil spout window 34 is connected to pressure communication channel 32, and pressure communication channel 32 is located at spray
It on oily device lower body 36, is connected to the high pressure oil input channel 18 in Fig. 4, is equipped with meter in hole 31 between the two, constitute oil spout window 34
Hole diameter be greater than meter in hole 31 diameter.
Other two sets of oil circuits are also devised on the circumferential surface of fuel injector.As shown in fig. 6, among fuel injector upper body 2, fuel injector
Duct composition heavy oil oil input channel 46 is machined on body 4 and fuel injector lower body 36.It is similar with oil spout window 34, on fuel injector lower body 36
It is additionally provided with oil entered window 48, is pressurized window 49 and servo oil oil return window 51, wherein oil entered window 48 and heavy oil oil input channel
46 connections, pressurization window 49 are connected to pressurization oil duct 50 (being located on fuel injector lower body 36), and servo oil oil return window 51 is by watching
Oily communicating passage 52 is taken to be connected to the main oil return line 54 of servo oil.From Fig. 6 it can also be seen that being additionally provided with servo on fuel injector upper body 2
Oily oil return branch 53, servo oil oil return branch 53 are connected to top ring cavity 24 and the main oil return line 54 of servo oil.Pacify in solenoid valve
Dress region is additionally provided with meter out hole 55 and is connected to the main oil return line 54 of servo oil.In addition, from figure 3, it can be seen that pressurization in Fig. 5
Oil duct 50 is connected to booster cavity 39.
Pintle nozzle match-ing parts 6 are made of needle-valve 62 and needle-valve body 63.As shown in fig. 7, needle-valve 62 is mounted in needle-valve body 63, needle-valve
Needle control chamber 59 is formed between body 63 and fuel injector lower body 36, pressure communication channel 32 is connected to needle control chamber 59.Needle-valve
Spring 60 is mounted in needle control chamber 59, and it is Pre strained state that fuel injector, which assembles rear needle valve spring 60, and needle-valve 62 is by needle-valve
The downward active force of spring 60 is equipped with adjustment gasket 61 between needle-valve 62 and needle valve spring 60.63 end of needle-valve body be it is spherical and
It is provided with through-hole, is additionally provided with miscella oil trap 64, it is similar to the miscella oil trap 35 in Fig. 5 on fuel injector lower body 36, it is used for
The miscella of heavy oil and servo oil is collected, miscella oil road 72 is connected to miscella oil trap 64 and miscella back oil road 40.Needle
It is also provided with oil holding slot 65 on valve body 63, is readily apparent oil holding slot 65 from Fig. 3 and is connected to pressurization oil duct 50.In needle control chamber 59
The resultant force of fuel pressure and needle valve spring 60 and the relative size of the fuel pressure in oil holding slot 65 will determine lifting for needle-valve 62
With take a seat, nozzle 10 is mounted on needle-valve body 63 by sleeve 8, and nozzle seat surface 70 contact with needle-valve body spherical surface 67 realizes that circumferential direction is close
Envelope.Nozzle 10 is equipped with injection channel 69, and when needle-valve 62 lifts, the fuel oil in oil holding slot 65 enters injection channel 69 and passes through
Spray orifice 68 sprays into cylinder.
Illustrate the course of work of fuel injector below in conjunction with Fig. 1~7:
This fuel injector is pressurized using servo oil to heavy oil, is configured with four oil circuits, respectively servo oil in-line, servo altogether
Oily oil return line, heavy oil in-line and miscella oil return line.Servo oil in-line includes high pressure oil input channel 18, pressurization oil input channel
19, pressure communication channel 32；Servo oil oil return line includes the main oil return line 54 of servo oil, servo oil oil return branch 53, servo oil company
Circulation passage 52；Heavy oil in-line includes heavy oil oil input channel 46, pressurization oil duct 50；Miscella oil return line includes miscella back oil road
40, miscella oil road 72.Illustrate in turn below.
Servo oil enters fuel injector from servo oil oil inlet shown in FIG. 1, and usual servo oil is the high pressure lubricating oil after pressurization.
By fuel injector upper body 2, in the punishment of fuel injector intermediate 4 at two parts, a part arrives at lower loop via pressurization oil input channel 19
Chamber 22, another part enter pressure communication channel 32 after flowing through meter in hole 31 and flow into needle-valve by high pressure oil input channel 18
Control chamber 59.The oil return opening of servo oil shown in Fig. 3 usually connects engine servo fuel tank or Fuel Tanking Unit, and access is low pressure servo
Oil.Since top ring cavity 24 is connected to by servo oil oil return branch 53 with the main oil return line 54 of servo oil, charged piston ring cavity 44 is logical
Cross servo oil oil return window 51, servo oil communicating passage 52 and servo oil main oil return line 54 be connected tos, therefore top ring cavity 24 be pressurized
It is low pressure servo oil in piston ring cavity 44.In addition, the servo oil of low pressure by pressure release passage 25, is recycled by top ring cavity 24
Oil outlet 26 flows into solenoid valve installation region, then flows back to servo oil oil return opening through meter out hole 55, thus circulates always,
It can be the solenoid valve heat dissipation in work.And the servo oil of 22 mesohigh of lower part ring cavity, it will be along among valve rod 17 and fuel injector
Gap small amount of leakage between body 4 enters pressure-releasing chamber 20, equally returns through circulation oil outlet 26, meter out hole 55 the servo oil that flows back out
Hydraulic fluid port.
Heavy oil enters fuel injector from heavy oil oil inlet shown in Fig. 3, enters low pressure through heavy oil oil input channel 46 and oil entered window 48
Chamber 38, it is worth noting that, the heavy oil into fuel injector is low pressure, and then the oil pressure in low pressure chamber 38 is low pressure.
When original state, 15 no power of electromagnetic valve coil, valve rod 17 is pressed in spray under the action of the power of magnetic valve spring 28
On the upper surface of oily device intermediate 4, flat seal is realized with fuel injector intermediate 4.Intermediate ring cavity 23 and lower part ring cavity 22 at this time
Separate and be connected to top ring cavity 24, low pressure servo oil acts on charged piston upper surface 45 through communicating passage 21 at this time.Cause
The Fluid pressure acted in low pressure chamber 38 and charged piston upper surface 45 at this time is low pressure, in the power of charged piston spring 41
Under effect, charged piston 37 is located at uppermost position, and top is contacted with fuel injector intermediate 4.We claim charged piston at this time
37 are located at initial position.In initial position, charged piston ring cavity lower surface 43 is higher than oil spout upper window edge face on axial position
33, i.e., charged piston ring cavity 44 is not connected to pressure communication channel 32 at this time.Also, the charged piston shoulder face 47 in initial position
It is higher than the lower along face of the slot of pressurization window 49 on axial position, i.e. low pressure chamber 38 is connected to pressurization oil duct 50.Pressurization is mentioned before
Oil duct 50 is connected to booster cavity 39, and is connected to oil holding slot 65.Therefore booster cavity 39, pressurization oil duct 50, Sheng are oily in the initial state
It is low pressure heavy oil in slot 65.
It is high pressure servo oil in needle control chamber 59 by preceding described it is found that when charged piston 37 is located at initial position,
Under the action of the spring force of servo oil pressure and needle valve spring 60, the face of needle seating 66 of needle-valve 62 and the needle-valve housing of needle-valve body 63
Linear sealing is realized in the contact of face 71, prevents oil holding slot 65 from being connected to injection channel 69, fuel injector not oil spout at this time.
When electromagnetic valve coil 15 is powered, armature 16 is moved up by electromagnetic force, and move up with ovable valve stem 17 so that valve rod 17 with
The contact of fuel injector upper body 2 realizes linear sealing to cut off the connection of intermediate ring cavity 23 and top ring cavity 24；At the same time, valve rod 17
Move up so that lower part ring cavity 22 is connected to intermediate ring cavity 23.High pressure servo oil acts on charged piston by communicating passage 21
On surface 45, since fluid is low pressure in moment low pressure chamber 38 before, booster cavity 39, then charged piston 37 is in high pressure servo
The spring force of charged piston spring 41 is overcome to move down under the action of oil.Charged piston shoulder face 47 covers in increasing first in folding process
Window 49 is pressed, that is, cut off low pressure chamber 38 and is pressurized the connection of oil duct 50.Then oil duct 50, booster cavity 39, oil holding slot 65 are pressurized
Etc. an enclosure space is constituted, charged piston 37, which continues to move down, will compress the heavy oil in the enclosure space, i.e., in the space
Heavy oil is pressurized, and then the heavy oil oil pressure in oil holding slot 65 increases.
Charged piston 37 continues to move down, and when oil spout window 34 is opened in charged piston ring cavity lower surface 43, pressure communication is logical
High pressure servo oil in road 32 starts to pass sequentially through oil spout window 34, charged piston ring cavity 44, the inflow of servo oil oil return window 51
The main oil return line 54 of servo oil simultaneously finally flows back to engine servo fuel tank.When charged piston 37 moves down into certain position, due to spray
The diameter of the flow-out hole of oily window 34 is greater than the diameter in meter in hole 31, so the servo oil stream in pressure communication channel 32 goes out
Amount is greater than from the influx in meter in hole 31, so that servo oil pressure reduces in pressure communication channel 32, then noticeable degree
Pressure in chamber 59 also reduces.In other words, moving down with charged piston 37, the pressure liter of fluid in one side oil holding slot 65
Height, the Fluid pressure in another aspect needle control chamber 59 reduce, when the heavy oil pressure in oil holding slot 65 is greater than needle valve spring 60
When with the resultant force of the servo oil pressure in needle control chamber 59, needle-valve 62 is lifted, i.e., face of needle seating 66 and needle valve seat' s cone 71 are de-
From the pressurized heavy oil in oil holding slot 65 enters injection channel 69 and sprays from spray orifice 68, i.e., fuel injector commencement of fuel injection acts.
We claim the charged piston when fuel injector oil spout to be located at the second position.
After the fuel oil of desired amount is injected into cylinder, electromagnetic valve coil 15 is powered off, and valve rod 17 is in solenoid valve bullet
It is moved down under the action of spring 28 again with the upper end face contact of fuel injector intermediate 4 to cut off lower part ring cavity 22 and intermediate ring cavity 23
Connection, and be connected to top ring cavity 24 with intermediate ring cavity 23.Then the high pressure on charged piston upper surface 45 is acted on
Servo oil passes sequentially through communicating passage 21, intermediate ring cavity 23, top ring cavity 24, servo oil oil return branch 53, the main oil return of servo oil
Engine servo fuel tank is flowed back on road 54, and the oil pressure on charged piston upper surface 45 reduces, and charged piston 37 will be in charged piston bullet
It is moved up under the action of oil pressure in spring 41, booster cavity 39.Charged piston 37 will be first shut off oil spout window 34 at this time, once oil spout window
Mouthfuls 34 close, the oil pressure in needle control chamber 59 by due to the entrance of the endlessly high pressure servo oil in meter in hole 31 and
It increases rapidly；And then charged piston 37 will be opened and be pressurized window 49, and heavy oil will be flowed along low pressure chamber 38, pressurization window 49 at this time
Enter to be pressurized oil duct 50, i.e., to pressurization oil duct 50, booster cavity 39, the inner supplement heavy oil of oil holding slot 65.Move up in charged piston 37 until
During opening pressurization window 49, pressure is gradually reduced in oil holding slot 65, is even lower than entered from fuel injector heavy oil entrance
Heavy oil oil pressure.In this way, the oil pressure in one side needle control chamber 59 quickly increases after the power-off of coil 15, oil is on the other hand contained
Oil pressure quickly reduces in slot 65, and the fuel injector constant compared to pressure in conventional oil holding slot, this oil-fuel injector needle-valve 62 will more
It rapidly takes a seat, it is more clear-cut that fuel injector shows as oil-break.
Charged piston 37 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 44 all keeps being connected to servo oil oil return window 51 and fluid flow area in entire injection process
It is sufficiently large, to guarantee that pressure communication channel 32 vents in time with the high pressure servo oil in needle control chamber 59.
Due to being always low pressure servo oil in charged piston ring cavity 44, and in low pressure chamber 38 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 37 and fuel injector lower body 36 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
35 import miscella back oil road 40 for collecting the oil of leakage, and by miscella oil outlet 42, are then exhausted from miscella shown in Fig. 1
Oil return opening unifies collection processing.Miscella oil trap 64 is also based on same consideration design, due in needle control chamber 59
It is heavy oil in oil holding slot 65 for servo oil, the oil that miscella oil trap 64 will collect the leakage of the two is equally returned by miscella
The export of oil duct 40 is uniformly processed.
Claims (3)
1. intensified electric-controlled fuel injector peculiar to vessel, it is characterized in that: including under fuel injector upper body, fuel injector intermediate, fuel injector
Body, electromagnetic valve component, supercharger assembly, pintle nozzle match-ing parts, fuel injector upper body, fuel injector intermediate and fuel injector lower body are from top to bottom
It is arranged, servo oil oil inlet, high pressure oil input channel, servo oil oil return opening, the main oil return line of servo oil, servo is set in fuel injector upper body
Oily oil return branch, heavy oil oil inlet, heavy oil oil input channel, high pressure oil input channel are connected to servo oil oil inlet, the main oil return line point of servo oil
Not Lian Tong servo oil oil return opening and servo oil oil return branch, heavy oil oil input channel be connected to heavy oil oil input channel；
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, the main oil return line of servo oil are respectively communicated with servo oil oil return
Branch and servo oil communicating passage, 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, be provided in fuel injector lower body into
Oily window, servo oil oil return window, pressurization window, pressurization oil duct, oil spout window, pressure communication channel, 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, oil entered window is connected to heavy oil oil input channel, and servo oil oil return window is connected to servo
Oily communicating passage, pressurization oil duct are respectively communicated with pressurization window and booster cavity, and pressure communication channel is connected to oil spout window, and by into
Oily throttle orifice is connected to high pressure oil input 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.
2. intensified electric-controlled fuel injector peculiar to vessel according to claim 1, it is characterized in that: being arranged in fuel injector upper body mixed
Oily oil return opening is closed, miscella back oil road is set in fuel injector lower body, miscella back oil road is connected to miscella oil return opening, charged piston
Stub end be machined with miscella oil trap, miscella oil trap is connected to miscella back oil road by miscella oil outlet；Needle-valve
Miscella oil road is set in body and needle-valve miscella oil trap, miscella oil road are respectively communicated with miscella back oil road and needle-valve
Miscella oil trap.
3. intensified electric-controlled fuel injector peculiar to vessel according to claim 1 or 2, it is characterized in that:
When original state, electromagnetic valve coil no power, valve rod is pressed in fuel injector intermediate under the action of the power of magnetic valve spring
Upper surface on, realize flat seal with fuel injector intermediate, at this time intermediate ring cavity and lower part ring cavity separate and with top ring cavity
Connection, low pressure servo oil act on charged piston upper surface through communicating passage；Charged piston is located at uppermost position, increases at this time
Pressure piston is located at initial position, and top is contacted with fuel injector intermediate, and in initial position, charged piston ring cavity lower surface exists
It 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 at this time, charged piston
It is higher than the lower along face of the slot of pressurization window on the axial position of shoulder face, i.e. low pressure chamber is connected to pressurization oil duct；Noticeable degree is intracavitary to be
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 and the needle of needle-valve body
Valve block face contact realizes linear sealing, 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 connects with fuel injector upper body
Touching realizes linear sealing to cut off the connection of intermediate ring cavity Yu top ring cavity；Valve rod moves up so that lower part ring cavity and intermediate ring cavity
Connection, high pressure servo oil act on charged piston upper surface by communicating passage, effect of the charged piston in high pressure servo oil
Under overcome the spring force of charged piston spring to move down, charged piston shoulder face covers in pressurization window first in folding process, that is, cuts
The connection of low pressure chamber of having broken and pressurization oil duct, pressurization oil duct, booster cavity, oil holding slot etc. constitute enclosure space, and charged piston continues
Move down the heavy oil compressed in the enclosure space；Charged piston continues to move down, when oil spout window is opened in charged piston ring cavity lower surface
When, the high pressure servo oil in pressure communication channel passes sequentially through oil spout window, charged piston ring cavity, servo oil oil return window and flows into
The main oil return line cocurrent of servo oil postbacks motivation servo fuel tank, when the heavy oil pressure in oil holding slot is greater than needle valve spring and noticeable degree
When the resultant force of intracavitary servo oil pressure, needle-valve is lifted, and the heavy oil in oil holding slot enters injection channel and sprays from spray orifice, at this time
Charged piston is located at the second position；
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 flow back to engine servo fuel tank, charged piston is increasing
It is moved up under the action of oil pressure in pressure piston spring, booster cavity, charged piston is first shut off oil spout window at this time, then charged piston
Pressurization window is opened, heavy oil flows into pressurization oil duct along low pressure chamber, pressurization window, i.e., to pressurization oil duct, booster cavity, in oil holding slot
Supplement heavy oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810834560.5A CN109236523A (en) | 2018-07-26 | 2018-07-26 | Intensified electric-controlled fuel injector peculiar to vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810834560.5A CN109236523A (en) | 2018-07-26 | 2018-07-26 | Intensified electric-controlled fuel injector peculiar to vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109236523A true CN109236523A (en) | 2019-01-18 |
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ID=65072481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810834560.5A Withdrawn CN109236523A (en) | 2018-07-26 | 2018-07-26 | Intensified electric-controlled fuel injector peculiar to vessel |
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| CN (1) | CN109236523A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894775A (en) * | 2020-08-26 | 2020-11-06 | 中船动力研究院有限公司 | Supercharged fluid injection device and internal combustion engine |
| CN111946510A (en) * | 2020-09-09 | 2020-11-17 | 中船动力研究院有限公司 | Injection valve and engine |
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| CN104564460A (en) * | 2014-12-29 | 2015-04-29 | 沪东重机有限公司 | Supercharged common rail fuel injection system of marine low-speed diesel engine |
| 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 |
| 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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| CN1174935A (en) * | 1996-07-12 | 1998-03-04 | 贵州红林机械厂 | Mixing type hydraulic electric controlled fuel injector |
| DE10015741A1 (en) * | 2000-03-29 | 2001-10-04 | Siemens Ag | Hydraulic injector for high pressure fuel injection for IC engine has a ring duct around the pressure control piston to connect to the fuel feed and to the injector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894775A (en) * | 2020-08-26 | 2020-11-06 | 中船动力研究院有限公司 | Supercharged fluid injection device and internal combustion engine |
| CN111894775B (en) * | 2020-08-26 | 2024-04-23 | 中船动力研究院有限公司 | Supercharged fluid injection device and internal combustion engine |
| CN111946510A (en) * | 2020-09-09 | 2020-11-17 | 中船动力研究院有限公司 | Injection valve and engine |
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Application publication date: 20190118 |