CN109253002A - Variable boost is than pressure accumulation type electric control fuel oil jet system - Google Patents
Variable boost is than pressure accumulation type electric control fuel oil jet system Download PDFInfo
- Publication number
- CN109253002A CN109253002A CN201810833734.6A CN201810833734A CN109253002A CN 109253002 A CN109253002 A CN 109253002A CN 201810833734 A CN201810833734 A CN 201810833734A CN 109253002 A CN109253002 A CN 109253002A
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- Prior art keywords
- valve
- oil
- control valve
- level
- pressure
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The purpose of the present invention is to provide variable boosts than pressure accumulation type electric control fuel oil jet system, including common rail pipe, high-pressure oil pipe, high-pressure oil pump, filter, fuel tank, oil return pipe and fuel injector.The present invention uses two-stage electromagnetic valve arrangement, controls the pressurization area of three-level piston, different pressure ratios can be effectively realized, so that fuel injection characteristic is more flexible；The action process of needle-valve is driven by guide electromagnetic valve, and needle-valve fast response time, control freedom degree is big, and fuel injection characteristic is flexibly controllable, effectively increases the dynamic property of diesel engine and the economy of fuel oil, and diesel engine is made to can satisfy stringenter emission regulation；Meanwhile supercharger control valve and injector control valve are immersed in low pressure oil, play cooling effect to solenoid valve, guarantee its safe and reliable work；It is provided with AND DEWATERING FOR ORIFICE STRUCTURE in pressure accumulation chamber, reduces the pressure oscillation of fuel injector intermediate fuel oil, reduces circulating fuel injection quantity fluctuation, further more accurately controls high-pressure common-rail fuel system multi-injection process.
Description
Technical field
The present invention relates to a kind of diesel engines, specifically diesel fuel system.
Background technique
Diesel fuel injection system is the core component of diesel engine, and the quality of diesel engine combustion quality is largely
The upper performance depending on fuel injection system.The guideline for organizing diesel engine ideal combustion process is to inhibit initiation combustion, is added
Fast mid-term burning, reduction after-burning, high after wanting first low this requires the injection rate of electric-controlled fuel injector, end oil spout is quick, oil spout
Duration is moderate, but for existing electric control fuel oil jet system, realizes that above-mentioned course of injection can greatly increase control
Difficulty.
Since large and medium-sized diesel engine cycle distributive value peculiar to vessel is big, to provide enough distributive values while stabilizing fuel feeding and oil spout
Caused pressure oscillation in the process, it is desirable that be equipped with the common rail pipe of large volume on diesel engine, thus will cause common rail overpressure
It establishes that speed is slow, and the difficulty and cost of permanent high pressure sealing in common rail pipe can be increased simultaneously.And booster-type electric-controlled fuel injector, it is
Common rail pipe in system no longer puts aside the high pressure fuel for being directly used in injection, but for accumulating pressure lower fuel oil or hydraulic
Fuel pressure is amplified according to a certain percentage using charged piston, is pressurized to the fuel oil that will be sprayed by working oil, can
To realize faster response speed and higher injection pressure.But existing booster-type electric-controlled fuel injector is by charged piston structure
Restriction, for determining common rail pressure, after charged piston carries out a certain proportion of amplification to fuel pressure, system is only capable of
Fuel oil is sprayed into cylinder with the injection pressure of a certain determination, is difficult to realize diesel engine under different operating conditions to injection pressure and spray
The flexible control of oily rate.Secondly, the uniformity and stability of each cylinder injection process decline under big oil mass spray regime.
Summary of the invention
The purpose of the present invention is to provide be able to achieve flexibly control pressure ratio to reach different jeting effects, simultaneous with
Pressure accumulation cavity configuration can effectively reduce pressure oscillation, improve the variable boost combustion more automatically controlled than pressure accumulation type of oil spout uniformity and stability
Electronic fuel injection system.
The object of the present invention is achieved like this:
Variable boost of the present invention is than pressure accumulation type electric control fuel oil jet system, it is characterized in that: including fuel injector, fuel tank, common rail
Pipe；The fuel injector includes oil injector body, pressure accumulation cavity wall, pressurization control valve portion, three-level piston component, Injection Control valve portion
Point, needle-valve portion, pressurization control valve portion and three-level piston be mounted in oil injector body from top to bottom, Injection Control valve portion and
Needle-valve portion is arranged in from top to bottom in tight cap, and tight cap is fixed below oil injector body, and pressure accumulation cavity wall is fixed on supercharger control valve
Pressure accumulation chamber and high-pressure oil passage are arranged in pressure accumulation cavity wall for upper, and pressure accumulation chamber is connected to high-pressure oil passage, and installation is tight above pressure accumulation cavity wall
Gu cap, the fuel inlet of setting connection pressure accumulation chamber on fastening cap, setting filtering orifice plate in pressure accumulation chamber；
The pressurization control valve portion includes supercharger control valve upper valve base, supercharger control valve centre valve seat, dual-coil electromagnetic valve limit
Position orifice plate, charged piston limit orifice plate, supercharger control valve valve rod, level-one armature, second level armature, bacterium shape sleeve, supercharger control valve
Valve seat, dual-coil electromagnetic valve limit orifice plate and charged piston limit orifice plate are arranged from top to bottom among upper valve base, supercharger control valve, are pressurized
The head of control valve valve rod, which is located at, limits the supercharger control valve valve chamber that orifice plate and charged piston limit orifice plate are constituted by dual-coil electromagnetic valve
In, external is bacterium shape sleeve, and second level armature, the middle part installation of supercharger control valve valve rod are installed in the tail portion of supercharger control valve valve rod
Level-one armature, second level armature are located among supercharger control valve in valve seat, and level-one armature is located in dual-coil electromagnetic valve limit orifice plate, pressurization
Two-stage electromagnetic iron coil is wound in control valve upper valve base, winds level-one electromagnet coil, pressurization among supercharger control valve in valve seat
Supercharger control valve valve rod reset spring, pressurization control are set between control valve valve rod tail portion and supercharger control valve upper valve base above it
The part that valve valve rod processed is located at below level-one armature is cased with level-one armature fixed spring, the extension of bacterium shape sleeve and lower section
Charged piston, which limits, is arranged bacterium shape sleeve spring between orifice plate, the head of supercharger control valve valve rod is machined with T-type way to cycle oil, T
Type way to cycle oil includes the vertical access communicated and cross walkway, and dual-coil electromagnetic valve limits setting pressurization throttle orifice, second level on orifice plate
Pressure Increasing Oil-Line, charged piston, which limits, is arranged level-one Pressure Increasing Oil-Line and low pressure oil leak hole on orifice plate, pressurization throttle orifice, two-stage supercharging oil
Road, level-one Pressure Increasing Oil-Line are connected to supercharger control valve valve chamber with low pressure oil leak hole, are pressurized the other end connection high pressure oil of throttle orifice
Road, low pressure oil leak hole are connected to fuel tank；
The three-level piston component includes charged piston, piston return spring, and charged piston is three-level stepped cylinder structure,
It is respectively from top to bottom the first-third cylinder, and diameter successively decreases, the first cylinder and the charged piston above it limit between orifice plate
Form plunger shaft, plunger shaft limits the hole in orifice plate by charged piston and is connected to high-pressure oil passage, the first cylinder and the second cylinder and
Level-one booster cavity is formed between oil injector body, and two-stage supercharging chamber is formed between the second cylinder and third cylinder and oil injector body, the
Three-level booster cavity is formed between three cylinders and oil injector body below, and piston return spring, level-one are installed in three-level booster cavity
Booster cavity is connected to level-one Pressure Increasing Oil-Line, and two-stage supercharging chamber is connected to two-stage supercharging oil circuit, and three-level booster cavity is connected to high by check valve
Pressure oil road, three-level booster cavity lower part are provided with Pressure Increasing Oil-Line；
The Injection Control valve portion includes injector control valve upper valve base, injector control valve limit orifice plate, needle-valve limit hole
Plate, injector control valve valve rod, armature, injector control valve upper valve base, injector control valve limit orifice plate and needle-valve limit orifice plate from upper
And lower setting, the setting of injector control valve valve rod limit in orifice plate in injector control valve, rank is installed on the top of injector control valve valve rod
Injector control valve valve rod return spring, injector control valve valve are installed between iron, armature and injector control valve upper valve base above it
Electromagnet coil is wound in injector control valve upper valve base outside bar return spring, and low pressure draining is set in injector control valve valve rod
Hole, injector control valve limits orifice plate and needle-valve limit orifice plate constitutes injector control valve valve chamber, and injector control valve stem lower portion includes
Tapered protrusion, injector control valve, which limits, is arranged injector control valve in-line on orifice plate, injector control valve in-line is connected to high pressure oil
Road, needle-valve, which limits, is arranged oil inlet metering-orifice on orifice plate, oil inlet metering-orifice is connected to injector control valve valve chamber；
The nozzle includes needle-valve set, needle-valve, and needle-valve limit orifice plate and needle-valve set are arranged from top to bottom, and needle-valve is mounted on needle
Oil holding slot is formed in valve pocket and between needle-valve set, needle-valve covers end and spray orifice is arranged, and needle-valve limits shape between orifice plate and needle-valve set
At control chamber, the top of needle-valve is located in control chamber and is cased with needle valve spring, and control chamber is connected to Injection Control by oil inlet metering-orifice
Valve valve chamber, oil holding slot are connected to Pressure Increasing Oil-Line and high-pressure oil passage；
The import of common rail pipe is connected to fuel tank with filter by high-pressure oil pump, and the fuel inlet of fuel injector is connected by high-pressure oil pipe
The hydraulic oil outlet of logical common rail pipe, fuel injector are connected to fuel tank by oil return pipe.
The present invention may also include:
1, when can be without under boost mode, pressurization control valve portion no power, check valve be opened；When Injection Control valve portion is logical
When electric, electromagnet attracts armature, and armature drives injector control valve valve rod to move upwards to by conical surface seal and open low pressure and let out
Oilhole, the fuel oil in control chamber enters electromagnetism valve chamber by the low pressure oil leak hole in injector control valve valve rod, using setting
It is returned in low-pressure reservoir in the low pressure oil way in electromagnetism valve chamber；It is formed when the elastic force of pressure and needle valve spring in control chamber
When resultant force is less than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve is lifted up, and spray orifice is opened；When Injection Control valve portion powers off
When, injector control valve valve rod is taken a seat under the elastic force effect of injector control valve valve rod return spring, in low pressure draining bore closure
High-pressure oil passage is opened simultaneously, control chamber builds pressure by oil inlet metering-orifice again, when the elastic force of pressure and needle valve spring in control chamber
When the resultant force of formation is greater than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve drops back into one's seat.
2, under low pressure charging mode, the level-one electromagnet coil power of pressurization control valve portion, level-one electromagnet attracts level-one
Armature, level-one armature drive supercharger control valve valve rod to move upward to level-one electromagnet spacing place, and bacterium shape sleeve is in bacterium shape sleeve
As supercharger control valve valve rod is lifted up under the action of spring spring force, low pressure oil leak hole is opened, until by bacterium shape sleeve
The conical surface seal of top；Fuel oil in level-one booster cavity flows through low pressure oil leak hole by level-one Pressure Increasing Oil-Line and returns to low-pressure reservoir
Interior, charged piston moves downward, the closed check valve at the oil inlet of three-level booster cavity, subsequent injector control valve partial current,
Electromagnet attracts armature, and armature drives injector control valve valve rod to move upwards by conical surface seal and to open low pressure oil leak hole,
Fuel oil in control chamber is flowed back in low-pressure reservoir by low pressure oil leak hole；When the resultant force of control cavity pressure and needle-valve reset spring is small
When hydraulic coupling of the fuel oil in oil holding slot to needle-valve, needle-valve is lifted up, and spray orifice is opened；When the power-off of Injection Control valve portion,
Injector control valve valve rod is taken a seat under the elastic force effect of injector control valve valve rod return spring, while low pressure draining bore closure
High-pressure oil passage is opened, control chamber builds pressure by oil inlet metering-orifice again, when the elastic force of pressure and needle valve spring in control chamber is formed
Resultant force when being greater than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve drops back into one's seat；When the power-off of pressurization control valve portion, pressurization
Control valve valve rod drives bacterium shape sleeve to take a seat together under the spring-force driven dual of supercharger control valve reset spring, in low pressure oil leak hole
The conical surface seal of bacterium shape sleeve upper end is opened while closing, high pressure fuel reenters level-one by level-one Pressure Increasing Oil-Line and is pressurized
Chamber, charged piston are again turned on back up into initial position, check valve, and fuel oil is entered in three-level booster cavity again by check valve
Enter oil holding slot.
3, under high pressure-charging mode, the level-one electromagnet coil power of pressurization control valve portion, level-one electromagnet attracts level-one
Armature, level-one armature drive supercharger control valve valve rod to move upward to level-one electromagnet spacing place, and bacterium shape sleeve is in bacterium shape sleeve
As supercharger control valve valve rod is lifted up under the action of spring spring force, until by the same of the conical surface seal above bacterium shape sleeve
When open low pressure oil leak hole, the fuel oil in level-one booster cavity flows through low pressure oil leak hole by level-one Pressure Increasing Oil-Line and returns to low-pressure reservoir
It is interior；The two-stage electromagnetic iron coil of pressurization control valve portion is powered, and two-stage electromagnetic iron attracts second level armature, and then second level armature drives
Supercharger control valve valve rod is detached from level-one armature and continues up at second level limiting position of armature, and supercharger control valve valve rod is detached from bacterium shape
Sleeve continuation up moves, and T-type way to cycle oil is opened, and the intracavitary fuel oil of two-stage supercharging passes through bacterium by two-stage supercharging oil circuit again
T-type way to cycle oil in shape sleeve is flow back into low-pressure reservoir, and charged piston moves downward, at the oil inlet of three-level booster cavity
Closed check valve, then injector control valve partial current, electromagnet attract armature, and armature drives Injection Control valve rod to move upwards
To by conical surface seal and open low pressure oil leak hole, the fuel oil in control chamber is flowed back in low-pressure reservoir by low pressure oil leak hole, when
When the hydraulic coupling that the resultant force for controlling cavity pressure and needle-valve reset spring is less than fuel oil in oil holding slot to needle-valve, needle-valve is lifted up,
Spray orifice is opened；When the power-off of Injection Control valve portion, elastic force of the injector control valve valve rod in injector control valve valve rod return spring
It takes a seat under effect, high-pressure oil passage is opened while low pressure draining bore closure, control chamber builds pressure by oil inlet metering-orifice again, works as control
When making the resultant force that the elastic force of intracavitary pressure and needle valve spring is formed and being greater than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve is again
It takes a seat；When the power-off of pressurization control valve portion, supercharger control valve valve rod is under the spring-force driven dual of supercharger control valve reset spring
Bacterium shape sleeve is driven to take a seat together, T-type way to cycle oil transverse direction oil circuit is closed, and bacterium shape sleeve is opened while low pressure draining bore closure
The conical surface seal of upper end, high pressure fuel reenter level-one booster cavity and second level by level-one Pressure Increasing Oil-Line and two-stage supercharging oil circuit
Booster cavity, charged piston are again turned on back up into initial position, check valve, and fuel oil enters three-level booster cavity by check valve
Inside enter back into oil holding slot.
Present invention has an advantage that 1, variable boost of the invention is than the fuel injector in pressure accumulation type electric control fuel oil jet system
Using the charged piston of three-level step circular table, changes pressure ratio by way of changing pressure application surface product, make oil holding slot
Interior fuel pressure can be adjusted according to actual condition, effectively improved the flexibility of oil spout, enable diesel engine
Stringent emission regulation demands are better met, the effective economy and dynamic property for improving diesel engine；2, the present invention uses
Supercharger control valve can be realized multistage positioning, realize that the on-off of a plurality of Pressure Increasing Oil-Line is controllable, so as to adjust the high pressure of charged piston
Oily active area guarantees the flexible control of electric-controlled fuel injector pressure ratio；3, the low pressure oil leak hole in injector control valve valve rod and electricity
Magnet valve chamber is connected, and the fuel oil in control chamber also plays the effect of cooling solenoid valve, energy by the oil return of low pressure oil leak hole
Enough increase the stability of electromagnetic valve work, in addition the low pressure oil leak hole in control valve valve rod reduces the matter of injector control valve valve rod
Amount accelerates Injection Control response valve；4, pressure accumulation chamber can slowing oil injection when caused pressure oscillation, be conducive to oil spout
The accurate control of amount, is remarkably improved, while advantageously reducing common rail pipe to material especially for the control precision of small oil mass
Requirement, improve its service life, be provided with AND DEWATERING FOR ORIFICE STRUCTURE in pressure accumulation chamber, the combustion to fuel injector high-pressure oil pipe is flowed to from pressure accumulation chamber
Oil plays the role of throttling and filtering, to reduce the pressure oscillation of fuel injector intermediate fuel oil, circulating fuel injection quantity fluctuation is reduced, into one
Step more accurately controls high-pressure common-rail fuel system multi-injection process.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is fuel injector schematic diagram；
Fig. 3 is supercharger control valve partial schematic diagram；
Fig. 4 is three-level piston component；
Fig. 5 is injector control valve partial schematic diagram；
Fig. 6 is needle-valve portion schematic diagram.
Specific embodiment
It illustrates with reference to the accompanying drawing and the present invention is described in more detail:
In conjunction with Fig. 1-6, variable boost of the present invention is than pressure accumulation type electric control fuel oil jet system, including common rail pipe 9, high-pressure oil pipe
7, high-pressure oil pump 1, filter 3, fuel tank 4, oil return pipe 2 and fuel injector 6 are constituted, 9 right end of common rail pipe respectively with high-pressure oil pump 1, filter
Device 3 is connected to fuel tank 4, multiple hydraulic oil outlets 8 is provided on common rail pipe 9, the number of hydraulic oil outlet 8 is according to cylinder of internal-combustion engine
Number determines that hydraulic oil outlet 8 is connected by the fuel inlet 20 being provided on high-pressure oil pipe 7 and fuel injector 6, and fuel injector 6
On the low pressure oil return opening 5 that is provided with fuel tank 4 is connected to by oil return pipe 2.6 part of fuel injector is by fastening cap 10, pressure accumulation cavity wall 11, pressurization
Control valve portion 12, three-level piston component 13, Injection Control valve portion 14, needle-valve portion 15, oil injector body 17,18 and of pressure accumulation chamber
Orifice plate 19 is filtered to form.Pressurization control valve portion 12 is mainly by two-stage electromagnetic iron coil 21 and second level armature 22, level-one electromagnet
Coil 23 and level-one armature 24, charged piston limit orifice plate 28, bacterium shape sleeve 31, bacterium shape sleeve spring 30, dual-coil electromagnetic valve limit
Orifice plate 34, supercharger control valve valve rod 36, level-one armature fixed spring 35 and supercharger control valve valve rod reset spring 37 form, and increase
36 head of pressure control valve valve rod is provided with T-type way to cycle oil 26, and 31 sets of bacterium shape sleeve, on 36 head of supercharger control valve valve rod, pass through phase
To movement cutting and the lateral oil circuit of T-type way to cycle oil 26 is opened, the longitudinal oil circuit of T-type way to cycle oil 26 is connected with low pressure oil leak hole 29
Logical, supercharger control valve valve chamber 32 is communicated with level-one Pressure Increasing Oil-Line 27, two-stage supercharging oil circuit 25 and pressurization throttle orifice 33, bacterium shape sleeve
31 are located in supercharger control valve valve chamber 32.Three-level piston component 13 mainly includes charged piston 44, piston return spring 41 and list
To valve 43, charged piston 44 is three-level step frustum cone structure, charged piston 44 and oil injector body 17 constitute level-one booster cavity 38,
Two-stage supercharging chamber 39 and three-level booster cavity 40, level-one booster cavity 38 are connected with level-one Pressure Increasing Oil-Line 27, two-stage supercharging chamber 39 with
Two-stage supercharging oil circuit 25 is connected, and three-level booster cavity 40 is connected with oil holding slot 56, and passes through check valve 43 and high-pressure oil passage phase
Connection.It is machined with low pressure oil leak hole 48 in injector control valve valve rod 47, is connected with electromagnetism valve chamber, electromagnetism valve chamber and low-pressure reservoir
It is connected.
Fig. 1 is overall structure diagram of the variable boost of the present invention than pressure accumulation type electric control fuel oil jet system, including common rail
Pipe 9, high-pressure oil pipe 7, high-pressure oil pump 1, filter 3, fuel tank 4, oil return pipe 2 and fuel injector 6.9 right end of common rail pipe by respectively with
High-pressure oil pump 1, filter 3 are connected to fuel tank 4, are provided with multiple hydraulic oil outlets 8 on common rail pipe 9, the number of hydraulic oil outlet 8 according to
The number of cylinder of internal-combustion engine determines that hydraulic oil outlet 8 is connected by the fuel inlet 20 being provided on high-pressure oil pipe 7 and fuel injector 6
It is logical, and the low pressure oil return opening 5 being provided on fuel injector 6 is connected to fuel tank 4 by oil return pipe 2.
Fig. 2 is the overall structure of fuel injector 6, mainly by fastening cap 10, pressure accumulation cavity wall 11, pressurization control valve portion 12, three
Grade piston component 13, Injection Control valve portion 14, needle-valve portion 15, oil injector body 17 and filtering orifice plate 19 form.Fastening cap
10, which are linked closely pressurization control valve portion 12 by screw thread, is fixed on oil injector body 17, and pressure accumulation cavity wall 11 passes through screw thread for oil spout control
Valve portion 14 processed, which is pressed together and linked closely with needle-valve portion 15, to be fixed on oil injector body 17, and fastening cap 10 will be stored by screw thread
It presses chamber 18 to close, while being machined with fuel feed hole 23 on fastening cap 10 for high pressure oil to be introduced into pressure accumulation chamber 18.The tight cap 16 of nozzle
Injection Control valve portion 14 and needle-valve portion 15 are pressed together and linked closely by screw thread and is fixed on oil injector body 17.
Fig. 3 is the pressurization control valve portion 12 of fuel injector 6, and pressurization control valve portion 12 mainly includes two-stage electromagnetic iron wire
Circle 21 limits orifice plate 28, bacterium shape sleeve with two-stage electromagnetic valve 22, level-one electromagnet coil 23 and level-one armature 24, charged piston
31, bacterium shape sleeve spring 30, dual-coil electromagnetic valve limit orifice plate 34, supercharger control valve valve rod 36, level-one armature fixed spring 35 and
Supercharger control valve valve rod reset spring 37.Level-one electromagnet coil 23 is superimposed placement with two-stage electromagnetic iron coil 21, wherein second level
Electromagnet coil 21 is located at the top of level-one electromagnet coil 23.Dual-coil electromagnetic valve limits orifice plate 34 and charged piston limits orifice plate 28
Supercharger control valve valve chamber 32 is formed, is machined with pressurization throttle orifice 33 and two-stage supercharging oil circuit 25 on dual-coil electromagnetic valve limit orifice plate 34,
One end of pressurization throttle orifice 33 and two-stage supercharging oil circuit 25 is all connected with supercharger control valve valve chamber 32, and pressurization throttle orifice 33 is another
End is connected with high-pressure oil passage, and high pressure oil is introduced supercharger control valve valve chamber 32.It is machined on charged piston limit orifice plate 34 low
Press oil leak hole 29 and level-one Pressure Increasing Oil-Line 27, low pressure oil leak hole 29 and level-one Pressure Increasing Oil-Line 27 all with 32 phase of supercharger control valve valve chamber
Connection, low pressure oil leak hole 29 are connected to low-pressure reservoir 4.Bacterium shape sleeve 31 is placed in supercharger control valve valve chamber 32, bacterium shape sleeve
31 pass through 30 pressing sleeve of bacterium shape sleeve spring on the head of supercharger control valve valve rod 36, and supercharger control valve valve rod 36 can be in bacterium shape set
It is slided up and down in cylinder 31.36 head of supercharger control valve valve rod is machined with T-type way to cycle oil 26, and the vertical of T-type way to cycle oil 26 leads to
Road is connected with the access of bacterium shape sleeve 31, when bacterium shape sleeve 31 is pressed on supercharger control valve valve rod 36, T-type way to cycle oil
26 cross walkway is to close, when supercharger control valve valve rod 36 is moved up with respect to bacterium shape sleeve 31, T-type way to cycle oil 26
It opens.Supercharger control valve valve rod 36 and bacterium shape sleeve 31 are pressed on charged piston limit by supercharger control valve valve rod reset spring 37
On orifice plate 28, and low pressure oil leak hole 29 is closed.Supercharger control valve valve rod 36 passes through the hole among level-one electromagnet coil 23
Orifice plate 34 is limited with dual-coil electromagnetic valve, is placed with level-one armature between level-one electromagnet coil 23 and dual-coil electromagnetic valve limit orifice plate 34
24, supercharger control valve valve rod 36 passes through 24 center of level-one armature, and level-one armature 24 is fixed on pressurization control by level-one armature spring 35
On valve valve rod 36 processed, magneticaction of the level-one armature 24 by level-one electromagnet coil 23 increases when level-one armature 24 is attracted
Pressure control valve valve rod 36 can be detached from level-one armature 24 and move upwards.Second level armature 22 is placed in the top of supercharger control valve valve rod 36
End, and connect with supercharger control valve valve rod 36, second level armature 22 can be by the magneticaction of two-stage electromagnetic iron coil 21.
Charged piston 44, oil injector body 17, piston return spring 41 and check valve 43 together constitute the three-level of fuel injector 6
Piston component 13, as shown in Figure 4.Charged piston 44 is a three-level stepped cylinder structure, total with charged piston limit orifice plate 28
Isomorphism is passed through plunger shaft 45 by the hole opened on piston limit orifice plate 28 at plunger shaft 45, high pressure oil.Charged piston 44 and oil spout
Body 17 together constitutes level-one booster cavity 38, two-stage supercharging chamber 39 and three-level booster cavity 40, wherein level-one booster cavity 38 and two
Grade booster cavity 39 is connected with level-one Pressure Increasing Oil-Line 27 and two-stage supercharging oil circuit 25 respectively, the high pressure in supercharger control valve valve chamber 32
Oil respectively enters level-one booster cavity 36 and two-stage supercharging chamber 37 by level-one Pressure Increasing Oil-Line 27 and two-stage supercharging oil circuit 25.Three-level increases
Pressure chamber 40 is connected by check valve 43 with high-pressure oil passage, and piston return spring 41, while three are placed in three-level booster cavity 40
40 lower part of grade booster cavity is also provided with Pressure Increasing Oil-Line 42, and the oil in three-level booster cavity 40 is introduced into oil holding slot 56 by Pressure Increasing Oil-Line 42.
Electromagnet 43, injector control valve valve rod 47, armature 52, injector control valve valve rod return spring 54 and injector control valve
Limit orifice plate 53 together constitutes the Injection Control valve portion 14 of fuel injector 6, as shown in Figure 5.Injector control valve limits orifice plate 53
Injector control valve valve chamber 49 is together constituted with needle-valve limit orifice plate 50,47 lower end of injector control valve valve rod is a bacterium shape knot
Structure is located in injector control valve valve chamber 49.Low pressure oil leak hole 48, injector control valve valve are machined among injector control valve valve rod 47
Injector control valve valve rod 47 is pressed on needle-valve limit orifice plate 50 by bar return spring 54, and low pressure oil leak hole 48 is closed.Oil spout
Be provided with high-pressure oil passage in control valve limit orifice plate 53 towards injector control valve valve chamber 49, at the same be also provided on needle-valve limit orifice plate into
Oil mass hole 51,51 one end of oil inlet metering-orifice are connected to injector control valve valve chamber 49, and the other end is connected to control chamber 55, and high pressure oil is drawn
Enter into control chamber 55.
Fig. 6 show the structural schematic diagram of the needle-valve portion 15 of fuel injector 6, including needle-valve 57, needle valve spring 60 and nozzle
56.Nozzle 56 is located in control chamber 55 with needle-valve limit orifice plate composition control chamber 55 and oil holding slot 56, needle valve spring 60.Nozzle 56
Lower end is provided with spray orifice 58, when the resultant force of the pressure initiation in 60 elastic force of needle valve spring and control chamber 55 is greater than oil holding slot 56 to needle-valve
When the pressure of application, needle-valve 57, which is taken a seat, closes spray orifice 58；When needle-valve 57 lifts, spray orifice 58 is connected to oil holding slot 56, is started
Oil spout.
The draw fuel from fuel tank 4 of high-pressure oil pump 1 is provided with filter 3 between high-pressure oil pump 1 and fuel tank 4, and fuel oil passes through
Filter 3 is filtered.Then fuel oil is transported to common rail pipe 9, and multiple hydraulic oil outlets 8, each hydraulic oil are provided on common rail pipe 9
Outlet 8 is all connected by high-pressure oil pipe 7 with fuel injector 6, and high pressure fuel is transported to the fuel inlet 20 of fuel injector 6.Fuel oil
Pressure accumulation chamber 18 is entered from fuel inlet 20, filtering orifice plate is horizontally arranged in pressure accumulation chamber 18, pressure accumulation chamber 18 is located at fuel injector 6
The top, be connected respectively with fuel inlet and lower section high-pressure oil passage, high-pressure oil passage dual-coil electromagnetic valve limit orifice plate 34 at draw
One branch is entered in supercharger control valve valve chamber 32 by being pressurized throttle orifice 33, is divided into using supercharger control valve valve chamber 32
Two-way, enters level-one booster cavity 38 by level-one Pressure Increasing Oil-Line 27 all the way, and another way enters two by two-stage supercharging oil circuit 25
Grade booster cavity 39.Fuel oil continues to draw a branch at charged piston limit orifice plate 28 down, this branch leads to plunger shaft
45.Fuel oil is divided into two-way in the continuation of oil injector body 17 down and wherein: continuing all the way down through injector control valve limit hole
High-pressure oil passage in plate 53 enters injector control valve valve chamber 49, then enters control chamber 55 by oil inlet metering-orifice 51；Another way is logical
It crosses check valve 43 to enter in three-level booster cavity 40, be entered in oil holding slot 56 by Pressure Increasing Oil-Line 42 still further below.Piston at this time
Hydraulic coupling in chamber 45 is less than level-one booster cavity 38, two-stage supercharging chamber 39 and hydraulic coupling and piston time in three-level booster cavity 40
The resultant force that the elastic force of position spring 41 is formed, charged piston 44 are in extreme higher position, thus the fuel oil in three-level booster cavity 40 not by
Pressurization.The resultant force that the pressure in oil holding slot 56 and needle valve spring 60 are formed simultaneously is greater than the pressure in control chamber 55, at this time needle-valve
57 take a seat.According to the difference of injection process, fuel injector 6 can be divided into three kinds of different operating modes: without boost mode, low pressure charging mould
Formula and high pressure-charging mode.
When fuel injector 6 works under no boost mode, 12 no power of pressurization control valve portion, due to three-level piston at this time
The pressure balance of each acting surface, check valve 43 is opened, therefore the fuel pressure in three-level booster cavity 40 does not increase, oil holding slot
Fuel pressure in 56 is equal to the pressure of check valve another side.When Injection Control valve portion 14 is powered, electromagnet 46 attracts rank
Iron 52, armature 52 drive injector control valve valve rod 47 to move upwards by conical surface seal and to open low pressure oil leak hole 48, control
Fuel oil in chamber 55 enters electromagnetism valve chamber by the low pressure oil leak hole 48 in injector control valve valve rod 47, using setting in electricity
Low pressure oil way in magnet valve chamber returns in low-pressure reservoir 4, thus the pressure reduction in control chamber 55.Pressure in control chamber 55
When the resultant force that the elastic force of power and needle valve spring 60 is formed is less than the upward hydraulic coupling of fuel oil in oil holding slot 56, needle-valve 57 is lifted upwards
It rises, spray orifice 58 is opened, 6 commencement of fuel injection of fuel injector.When Injection Control valve portion 14 powers off, injector control valve valve rod 47 is in oil spout
It takes a seat under the elastic force effect of control valve valve rod return spring 54, opens high-pressure oil passage while closing low pressure oil leak hole 48,
Control chamber 55 builds pressure by oil inlet metering-orifice 51 again, when the resultant force that the elastic force of pressure and needle valve spring 60 in control chamber 55 is formed
When upward greater than fuel oil in oil holding slot 56 hydraulic coupling, needle-valve 57 drops back into one's seat, and fuel injector 6 stops oil spout.
When fuel injector 6 works under low pressure charging mode, the level-one electromagnet coil 23 of pressurization control valve portion 12 is powered,
Level-one electromagnet attracts level-one armature 24, and level-one armature 24 drives supercharger control valve valve rod 36 to move upward to level-one electromagnet limit
At position.Bacterium shape sleeve 31, as supercharger control valve valve rod 36 is lifted up, is incited somebody to action under the action of bacterium shape 30 spring force of sleeve spring
Low pressure oil leak hole 29 is opened, until by the conical surface seal of the top of bacterium shape sleeve 31.Fuel oil in level-one booster cavity 38 passes through level-one
Pressure Increasing Oil-Line 27 flows through low pressure oil leak hole 29 and returns in low-pressure reservoir 4, at this time the pressure reduction in level-one booster cavity 38, plunger shaft
Pressure in 45 is greater than level-one booster cavity 38, two-stage supercharging chamber 39 and pressure and piston return spring 41 in three-level booster cavity 40
The sum of elastic force, charged piston 44 moves downward, and the check valve 43 at the oil inlet of three-level booster cavity 40 is closed, three-level booster cavity
Fuel pressure in 40, which is pressurized, to be increased, and then the fuel pressure in oil holding slot 56 is caused to increase.Subsequent 3 part of injector control valve is logical
Electricity, electromagnet 46 attract armature 52, and armature 52 drives injector control valve valve rod 47 to move upwards by conical surface seal and to open
Low pressure oil leak hole 48, the fuel oil in control chamber 55 are flowed back in low-pressure reservoir 4 by low pressure oil leak hole 48.At this time in control chamber 55
Pressure reduction, when the resultant force of its pressure and needle-valve reset spring 57 is less than the hydraulic coupling of fuel oil in oil holding slot 56 to needle-valve 57,
Needle-valve 57 is lifted up, and spray orifice 58 is opened, 6 commencement of fuel injection of fuel injector.When Injection Control valve portion 14 powers off, injector control valve
Valve rod 47 is taken a seat under the elastic force effect of injector control valve valve rod return spring 54, is beaten while closing low pressure oil leak hole 48
High-pressure oil passage is opened, control chamber 55 builds pressure by oil inlet metering-orifice again, when the elastic force of pressure and needle valve spring 60 in control chamber 55
When the resultant force of formation is greater than the upward hydraulic coupling of fuel oil in oil holding slot 56, needle-valve 57 drops back into one's seat, and fuel injector 6 stops oil spout.When
When pressurization control valve portion 12 powers off, the band under the spring-force driven dual of supercharger control valve reset spring 37 of supercharger control valve valve rod 36
Dynamic bacterium shape sleeve 31 is taken a seat together, and the conical surface seal of 31 upper end of bacterium shape sleeve is opened while closing low pressure oil leak hole 29,
High pressure fuel reenters level-one booster cavity 38 by level-one Pressure Increasing Oil-Line 27, and the pressure in plunger shaft 45 increases less than level-one at this time
Press the sum of the elastic force of the pressure and piston return spring 41 in chamber 38, two-stage supercharging chamber 39 and three-level booster cavity 40, charged piston
44 back up into initial position.Pressure reduction in three-level booster cavity 40, check valve 43 are again turned on, and fuel oil passes through check valve 43
It enters in three-level booster cavity 41 and enters back into oil holding slot 56.
When fuel injector 6 works under high pressure-charging mode, the level-one electromagnet coil 23 of pressurization control valve portion 12 first
It is powered, level-one electromagnet attracts level-one armature 24, and level-one armature 24 drives supercharger control valve valve rod 36 to move upward to level-one electricity
Magnet spacing place.Bacterium shape sleeve 31 is under the action of bacterium shape 30 spring force of sleeve spring as supercharger control valve valve rod 36 is lifted upwards
It rises, opens low pressure oil leak hole 29 while by the conical surface seal of the top of bacterium shape sleeve 31.At this time in level-one booster cavity 38
Fuel oil flows through low pressure oil leak hole 29 by level-one Pressure Increasing Oil-Line 27 and returns in low-pressure reservoir 4,38 pressure reduction of level-one booster cavity.So
The two-stage electromagnetic iron coil 21 of pressurization control valve portion 12 is powered afterwards, and two-stage electromagnetic iron attracts second level armature 22, and then second level is held in the mouth
Iron 22 drives supercharger control valve valve rod 36 to be detached from level-one armature 24 and continues up at second level limiting position of armature.Pressurization control at this time
Valve valve rod 36 processed is detached from the continuation of bacterium shape sleeve 31 and up moves, and T-type way to cycle oil 26 is opened, the fuel oil in two-stage supercharging chamber 39
It is flow back into low-pressure reservoir 4 by the T-type way to cycle oil 26 in bacterium shape sleeve 31 again by two-stage supercharging oil circuit 25, two-stage supercharging
39 pressure of chamber also declines.The pressure in plunger shaft 45 is greater than level-one booster cavity 38, two-stage supercharging chamber 39 and three-level and increases at this time
The resultant force for pressing the elastic force of pressure and charged piston return spring 41 in chamber 40 to be formed, charged piston 44 move downward, and three-level increases
The check valve 43 at the oil inlet of chamber 40 is pressed to close, the fuel pressure in three-level booster cavity 40 increases, and then leads to oil holding slot 56
Interior fuel pressure increases.Then Injection Control valve portion 14 is powered, and electromagnet 46 attracts armature 52, and armature 52 drives oil spout control
Valve rod 47 processed moves upwards by conical surface seal and to open low pressure oil leak hole 48, and the fuel oil in control chamber 55 passes through low pressure draining
Hole 48 is flowed back in low-pressure reservoir 4.Pressure reduction in control chamber 55 at this time, when its pressure and the resultant force of needle-valve reset spring 57 are small
When hydraulic coupling of the fuel oil in oil holding slot 56 to 57 valve of needle, needle-valve 57 is lifted up, and spray orifice 58 is opened, 6 commencement of fuel injection of fuel injector.
When Injection Control valve portion 14 powers off, injector control valve valve rod 47 is acted in the elastic force of injector control valve valve rod return spring 54
Under take a seat, open high-pressure oil passage while closing low pressure oil leak hole 48, control chamber 55 builds pressure by oil inlet metering-orifice again, when
When the resultant force that the elastic force of pressure and needle valve spring 60 in control chamber 55 is formed is greater than the upward hydraulic coupling of fuel oil in oil holding slot 56,
Needle-valve 57 drops back into one's seat, and fuel injector 6 stops oil spout.When pressurization control valve portion 12 powers off, supercharger control valve valve rod 36 is increasing
Bacterium shape sleeve 30 is driven to take a seat together under the spring-force driven dual of pressure control valve reset spring 37, laterally by T-type way to cycle oil 26 first
Oil circuit is closed, and the conical surface seal of 31 upper end of bacterium shape sleeve, high pressure fuel are then opened while closing low pressure oil leak hole 29
Level-one booster cavity 38 and two-stage supercharging chamber 39 are reentered by level-one Pressure Increasing Oil-Line 27 and two-stage supercharging oil circuit 25, at this time piston
Pressure in chamber 45 is less than level-one booster cavity 38, two-stage supercharging chamber 39 and pressure and charged piston return in three-level booster cavity 40
The sum of the elastic force of spring 41, charged piston 44 is back up into initial position.Pressure reduction in three-level booster cavity 40, check valve 43
It is again turned on, fuel oil enters in three-level booster cavity 40 by check valve 43 and enters back into oil holding slot 56.
By the course of work of fuel injector it is found that the present invention passes through the movement sound for changing supercharger control valve during the work time
It answers, it can be achieved that different pressure ratios makes fuel injector can be realized more flexible injection characteristics to reach different injection pressures.
Present invention employs the injector control valves of electromagnetic type simultaneously, and which further improves the response speed of fuel injector and control essences
Degree, make multi-injection working method is implemented as possibility.Effectively increase the dynamic property of diesel engine and the economy of fuel oil.?
Way to cycle oil is set in injector control valve valve rod, oil return circuit is arranged in injector control valve, cooling solenoid valve is played
Effect improves the reliability of the present invention at work.Pressure accumulation chamber can effectively extenuate caused pressure oscillation when fuel oil injection,
Be conducive to the accurate control to distributive value, be remarkably improved especially for the control precision of small oil mass.Meanwhile when fuel injector is answered
When in common rail fuel combustion system, the pressure stabilization function of pressure accumulation chamber can be such that the size of common rail for diesel engine pipe reduces, this is conducive to drop
Requirement of the low common rail pipe to material, improves its service life.Meanwhile it being provided with AND DEWATERING FOR ORIFICE STRUCTURE in pressure accumulation chamber, it is drilled on orifice plate
The throttle orifice of different pore size plays the role of throttling and filtering to the fuel oil for flowing to fuel injector high-pressure oil pipe from pressure accumulation chamber, thus
The pressure oscillation of fuel injector intermediate fuel oil is reduced, circulating fuel injection quantity fluctuation is reduced, further more accurate control high-pressure common rail fuel oil
System multi-injection process.
Claims (5)
1. variable boost is than pressure accumulation type electric control fuel oil jet system, it is characterized in that: including fuel injector, fuel tank, common rail pipe；The spray
Oily device includes oil injector body, pressure accumulation cavity wall, pressurization control valve portion, three-level piston component, Injection Control valve portion, needle-valve portion
Point, pressurization control valve portion and three-level piston are mounted in oil injector body from top to bottom, Injection Control valve portion and needle-valve portion
It is arranged in tight cap from top to bottom, tight cap is fixed below oil injector body, and pressure accumulation cavity wall is fixed on supercharger control valve upper,
Pressure accumulation chamber and high-pressure oil passage are set in pressure accumulation cavity wall, and pressure accumulation chamber is connected to high-pressure oil passage, fastening cap, fastening are installed above pressure accumulation cavity wall
Setting is connected to the fuel inlet of pressure accumulation chamber on cap, setting filtering orifice plate in pressure accumulation chamber；
The pressurization control valve portion includes supercharger control valve upper valve base, supercharger control valve centre valve seat, dual-coil electromagnetic valve limit hole
Plate, charged piston limit orifice plate, supercharger control valve valve rod, level-one armature, second level armature, bacterium shape sleeve, supercharger control valve upper valve
Valve seat, dual-coil electromagnetic valve limit orifice plate and charged piston limit orifice plate are arranged from top to bottom among seat, supercharger control valve, pressurization control
The head of valve valve rod is located to be limited in the supercharger control valve valve chamber that orifice plate and charged piston limit orifice plate are constituted by dual-coil electromagnetic valve,
Outside is bacterium shape sleeve, and second level armature is installed in the tail portion of supercharger control valve valve rod, and level-one is installed at the middle part of supercharger control valve valve rod
Armature, second level armature are located among supercharger control valve in valve seat, and level-one armature is located in dual-coil electromagnetic valve limit orifice plate, pressurization control
Two-stage electromagnetic iron coil is wound in valve upper valve base, winds level-one electromagnet coil, pressurization control among supercharger control valve in valve seat
Supercharger control valve valve rod reset spring, supercharger control valve are set between valve valve rod tail portion and supercharger control valve upper valve base above it
The part that valve rod is located at below level-one armature is cased with level-one armature fixed spring, the extension of bacterium shape sleeve and the pressurization of lower section
Bacterium shape sleeve spring is set between piston limit orifice plate, and the head of supercharger control valve valve rod is machined with T-type way to cycle oil, and T-type returns
Oily access includes the vertical access communicated and cross walkway, and dual-coil electromagnetic valve limits setting pressurization throttle orifice, two-stage supercharging on orifice plate
Oil circuit, charged piston, which limits, is arranged level-one Pressure Increasing Oil-Line and low pressure oil leak hole on orifice plate, pressurization throttle orifice, two-stage supercharging oil circuit,
Level-one Pressure Increasing Oil-Line is connected to supercharger control valve valve chamber with low pressure oil leak hole, is pressurized the other end connection high-pressure oil passage of throttle orifice,
Low pressure oil leak hole is connected to fuel tank；
The three-level piston component includes charged piston, piston return spring, and charged piston is three-level stepped cylinder structure, from upper
And lower is respectively the first-third cylinder, and diameter successively decreases, the first cylinder and the charged piston above it are limited and are formed between orifice plate
Plunger shaft, plunger shaft limit the hole in orifice plate by charged piston and are connected to high-pressure oil passage, the first cylinder and the second cylinder and oil spout
Level-one booster cavity is formed between body, and two-stage supercharging chamber, third column are formed between the second cylinder and third cylinder and oil injector body
Three-level booster cavity is formed between body and oil injector body below, and piston return spring, level-one pressurization are installed in three-level booster cavity
Chamber is connected to level-one Pressure Increasing Oil-Line, and two-stage supercharging chamber is connected to two-stage supercharging oil circuit, and three-level booster cavity is connected to high pressure oil by check valve
Road, three-level booster cavity lower part are provided with Pressure Increasing Oil-Line；
The Injection Control valve portion includes injector control valve upper valve base, injector control valve limit orifice plate, needle-valve limit orifice plate, spray
Oil control valve valve rod, armature, injector control valve upper valve base, injector control valve limit orifice plate and needle-valve limit orifice plate are set from top to bottom
It sets, the setting of injector control valve valve rod limits in orifice plate in injector control valve, and armature, armature are installed in the top of injector control valve valve rod
Injector control valve valve rod return spring, injector control valve valve rod return bullet are installed between the injector control valve upper valve base above it
Electromagnet coil is wound in injector control valve upper valve base outside spring, and low pressure oil leak hole, oil spout are set in injector control valve valve rod
Control valve limits orifice plate and needle-valve limit orifice plate constitutes injector control valve valve chamber, and injector control valve stem lower portion includes that taper is convex
It rises, injector control valve, which limits, is arranged injector control valve in-line on orifice plate, injector control valve in-line is connected to high-pressure oil passage, needle-valve
It limits and oil inlet metering-orifice is set on orifice plate, oil inlet metering-orifice is connected to injector control valve valve chamber；
The nozzle includes needle-valve set, needle-valve, and needle-valve limit orifice plate and needle-valve set are arranged from top to bottom, and needle-valve is mounted on needle-valve set
In and between needle-valve set form oil holding slot, needle-valve covers end and spray orifice is arranged, and needle-valve is limited to be formed between orifice plate and needle-valve set and be controlled
Chamber processed, the top of needle-valve are located in control chamber and are cased with needle valve spring, and control chamber is connected to injector control valve valve by oil inlet metering-orifice
Chamber, oil holding slot are connected to Pressure Increasing Oil-Line and high-pressure oil passage；
The import of common rail pipe is connected to fuel tank with filter by high-pressure oil pump, and the fuel inlet of fuel injector is connected to altogether by high-pressure oil pipe
The hydraulic oil outlet of rail pipe, fuel injector are connected to fuel tank by oil return pipe.
2. variable boost according to claim 1 is than pressure accumulation type electric control fuel oil jet system, it is characterized in that: when can be without pressurization
Under mode, pressurization control valve portion no power, check valve is opened；When injector control valve partial current, electromagnet attracts armature,
Armature drives injector control valve valve rod to move upwards by conical surface seal and to open low pressure oil leak hole, and the fuel oil in control chamber is logical
The low pressure oil leak hole crossed in injector control valve valve rod enters electromagnetism valve chamber, using the low pressure oil way being arranged in electromagnetism valve chamber
Back in low-pressure reservoir；When pressure and needle valve spring in control chamber elastic force formed resultant force be less than oil holding slot in fuel oil to
On hydraulic coupling when, needle-valve is lifted up, spray orifice open；When the power-off of Injection Control valve portion, injector control valve valve rod is spraying
It takes a seat under the elastic force effect of oil control valve valve rod return spring, opens high-pressure oil passage while low pressure draining bore closure, control
Chamber builds pressure by oil inlet metering-orifice again, when the resultant force that the elastic force of pressure and needle valve spring in control chamber is formed is greater than in oil holding slot
When the upward hydraulic coupling of fuel oil, needle-valve drops back into one's seat.
3. variable boost according to claim 1 or 2 is than pressure accumulation type electric control fuel oil jet system, it is characterized in that: low pressure charging
Under mode, the level-one electromagnet coil power of pressurization control valve portion, level-one electromagnet attracts level-one armature, and level-one armature drives
Supercharger control valve valve rod moves upward to level-one electromagnet spacing place, and bacterium shape sleeve is under the action of bacterium shape sleeve spring spring force
As supercharger control valve valve rod is lifted up, low pressure oil leak hole is opened, until by the conical surface seal above bacterium shape sleeve；Level-one
Fuel oil in booster cavity flows through low pressure oil leak hole by level-one Pressure Increasing Oil-Line and returns in low-pressure reservoir, and charged piston moves downward,
Closed check valve at the oil inlet of three-level booster cavity, subsequent injector control valve partial current, electromagnet attract armature, armature band
Dynamic injector control valve valve rod moves upwards by conical surface seal and to open low pressure oil leak hole, and the fuel oil in control chamber passes through low pressure
Oil leak hole flows back in low-pressure reservoir；When control cavity pressure and needle-valve reset spring resultant force be less than oil holding slot in fuel oil to needle-valve
When hydraulic coupling, needle-valve is lifted up, and spray orifice is opened；When the power-off of Injection Control valve portion, injector control valve valve rod is in oil spout control
It takes a seat under the elastic force effect of valve valve rod return spring processed, high-pressure oil passage is opened while low pressure draining bore closure, control chamber is logical
It crosses oil inlet metering-orifice and builds pressure again, when the resultant force that the elastic force of pressure and needle valve spring in control chamber is formed is greater than fuel oil in oil holding slot
When upward hydraulic coupling, needle-valve drops back into one's seat；When the power-off of pressurization control valve portion, supercharger control valve valve rod is in supercharger control valve
It drives bacterium shape sleeve to take a seat together under the spring-force driven dual of reset spring, bacterium shape sleeve is opened while low pressure draining bore closure
The conical surface seal of upper end, high pressure fuel reenter level-one booster cavity by level-one Pressure Increasing Oil-Line, and charged piston is back up into first
Beginning position, check valve are again turned on, and fuel oil is entered in three-level booster cavity by check valve and enters back into oil holding slot.
4. variable boost according to claim 1 or 2 is than pressure accumulation type electric control fuel oil jet system, it is characterized in that: high pressure-charging
Under mode, the level-one electromagnet coil power of pressurization control valve portion, level-one electromagnet attracts level-one armature, and level-one armature drives
Supercharger control valve valve rod moves upward to level-one electromagnet spacing place, and bacterium shape sleeve is under the action of bacterium shape sleeve spring spring force
As supercharger control valve valve rod is lifted up, low pressure oil leak hole is opened while by conical surface seal above bacterium shape sleeve,
Fuel oil in level-one booster cavity flows through low pressure oil leak hole by level-one Pressure Increasing Oil-Line and returns in low-pressure reservoir；Pressurization control valve portion
Two-stage electromagnetic iron coil be powered, two-stage electromagnetic iron attracts second level armature, and then second level armature drives supercharger control valve valve rod de-
It is continued up at second level limiting position of armature from level-one armature, supercharger control valve valve rod is detached from the continuation of bacterium shape sleeve and up transports
It is dynamic, T-type way to cycle oil is opened, the intracavitary fuel oil of two-stage supercharging passes through the T-type in bacterium shape sleeve by two-stage supercharging oil circuit again
Way to cycle oil is flow back into low-pressure reservoir, and charged piston moves downward, the closed check valve at the oil inlet of three-level booster cavity, after
And injector control valve partial current, electromagnet attract armature, armature drives Injection Control valve rod to move upwards to which the conical surface is close
Seal and open low pressure oil leak hole, the fuel oil in control chamber is flowed back in low-pressure reservoir by low pressure oil leak hole, when control cavity pressure with
When the resultant force of needle-valve reset spring is less than that fuel oil is to the hydraulic coupling of needle-valve in oil holding slot, needle-valve is lifted up, and spray orifice is opened；Work as spray
When oil control valve part powers off, injector control valve valve rod is taken a seat under the elastic force effect of injector control valve valve rod return spring,
High-pressure oil passage is opened while low pressure draining bore closure, control chamber builds pressure by oil inlet metering-orifice again, when the pressure in control chamber
When being greater than the upward hydraulic coupling of fuel oil in oil holding slot with the resultant force that the elastic force of needle valve spring is formed, needle-valve drops back into one's seat；Work as pressurization
When controlling valve portion power-off, supercharger control valve valve rod drives bacterium shape sleeve under the spring-force driven dual of supercharger control valve reset spring
It takes a seat together, T-type way to cycle oil transverse direction oil circuit is closed, and the conical surface that bacterium shape sleeve upper end is opened while low pressure draining bore closure is close
Envelope, high pressure fuel reenter level-one booster cavity and two-stage supercharging chamber by level-one Pressure Increasing Oil-Line and two-stage supercharging oil circuit, are pressurized
Piston is again turned on back up into initial position, check valve, and fuel oil is entered in three-level booster cavity by check valve and entered back into
Oil holding slot.
5. variable boost according to claim 3 is than pressure accumulation type electric control fuel oil jet system, it is characterized in that: high pressure-charging mode
Under, the level-one electromagnet coil power of pressurization control valve portion, level-one electromagnet attracts level-one armature, and level-one armature drives pressurization
Control valve valve rod moves upward to level-one electromagnet spacing place, bacterium shape sleeve under the action of bacterium shape sleeve spring spring force with
Supercharger control valve valve rod is lifted up, and opens low pressure oil leak hole, level-one while by conical surface seal above bacterium shape sleeve
Fuel oil in booster cavity flows through low pressure oil leak hole by level-one Pressure Increasing Oil-Line and returns in low-pressure reservoir；The two of pressurization control valve portion
Grade electromagnet coil power, two-stage electromagnetic iron attract second level armature, and then second level armature drives supercharger control valve valve rod to be detached from one
Grade armature continues up at second level limiting position of armature, and supercharger control valve valve rod is detached from the continuation of bacterium shape sleeve and up moves, by T
Type way to cycle oil is opened, and the intracavitary fuel oil of two-stage supercharging passes through the T-type oil return in bacterium shape sleeve by two-stage supercharging oil circuit again and leads to
Road is flow back into low-pressure reservoir, and charged piston moves downward, the closed check valve at the oil inlet of three-level booster cavity, then oil spout
Control valve partial current, electromagnet attract armature, and armature drives Injection Control valve rod to move upwards by conical surface seal and to beat
Low pressure oil leak hole is opened, the fuel oil in control chamber is flowed back in low-pressure reservoir by low pressure oil leak hole, when control cavity pressure and needle-valve are multiple
When the resultant force of position spring is less than that fuel oil is to the hydraulic coupling of needle-valve in oil holding slot, needle-valve is lifted up, and spray orifice is opened；Work as Injection Control
When valve portion powers off, injector control valve valve rod is taken a seat under the elastic force effect of injector control valve valve rod return spring, is let out in low pressure
Oilhole opens high-pressure oil passage while closing, control chamber builds pressure by oil inlet metering-orifice again, when the pressure and needle-valve in control chamber
When the resultant force that the elastic force of spring is formed is greater than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve drops back into one's seat；Work as supercharger control valve
When part powers off, supercharger control valve valve rod drives bacterium shape sleeve one to rise and fall under the spring-force driven dual of supercharger control valve reset spring
Seat, T-type way to cycle oil transverse direction oil circuit are closed, and the conical surface seal of bacterium shape sleeve upper end is opened while low pressure draining bore closure, high
Compression ignition oil reenters level-one booster cavity and two-stage supercharging chamber by level-one Pressure Increasing Oil-Line and two-stage supercharging oil circuit, charged piston to
On return to initial position, check valve is again turned on, and fuel oil is entered in three-level booster cavity by check valve and enters back into oil holding slot.
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| CN201810833734.6A CN109253002A (en) | 2018-07-26 | 2018-07-26 | Variable boost is than pressure accumulation type electric control fuel oil jet system |
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| CN201810833734.6A CN109253002A (en) | 2018-07-26 | 2018-07-26 | Variable boost is than pressure accumulation type electric control fuel oil jet system |
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| CN109253002A true CN109253002A (en) | 2019-01-22 |
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| CN201810833734.6A Withdrawn CN109253002A (en) | 2018-07-26 | 2018-07-26 | Variable boost is than pressure accumulation type electric control fuel oil jet system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623103A (en) * | 2021-10-08 | 2021-11-09 | 中国重汽集团重庆燃油喷射系统有限公司 | Solenoid valve for dual fuel injector |
| CN113898510A (en) * | 2021-09-27 | 2022-01-07 | 常州市富奥机械有限公司 | Novel oil sprayer |
| CN114151243A (en) * | 2021-11-19 | 2022-03-08 | 哈尔滨工程大学 | Super-atomized ammonia fuel injector |
| CN114352453A (en) * | 2022-01-24 | 2022-04-15 | 一汽解放汽车有限公司 | Variable injection rate injector of common rail system, injection control method and automobile |
| US11713740B1 (en) * | 2022-02-24 | 2023-08-01 | Harbin Engineering University | High-pressure common rail fuel injector capable of achieving highly stable injection based on throttling damping accommodating effect |
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| US5954030A (en) * | 1994-12-01 | 1999-09-21 | Oded E. Sturman | Valve controller systems and methods and fuel injection systems utilizing the same |
| JP2006161568A (en) * | 2004-12-02 | 2006-06-22 | Nippon Soken Inc | Control valve and fuel injection valve having the same |
| CN104018969A (en) * | 2014-05-29 | 2014-09-03 | 哈尔滨工程大学 | Piezoelectric control pressure accumulation and stabilization oil sprayer |
| CN104632485A (en) * | 2014-12-29 | 2015-05-20 | 沪东重机有限公司 | Common-rail fuel oil jet system controlled by double electromagnetic valves and applied to low-speed diesel engine for ship |
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| US5954030A (en) * | 1994-12-01 | 1999-09-21 | Oded E. Sturman | Valve controller systems and methods and fuel injection systems utilizing the same |
| JP2006161568A (en) * | 2004-12-02 | 2006-06-22 | Nippon Soken Inc | Control valve and fuel injection valve having the same |
| CN104018969A (en) * | 2014-05-29 | 2014-09-03 | 哈尔滨工程大学 | Piezoelectric control pressure accumulation and stabilization oil sprayer |
| CN104632485A (en) * | 2014-12-29 | 2015-05-20 | 沪东重机有限公司 | Common-rail fuel oil jet system controlled by double electromagnetic valves and applied to low-speed diesel engine for ship |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898510A (en) * | 2021-09-27 | 2022-01-07 | 常州市富奥机械有限公司 | Novel oil sprayer |
| CN113623103A (en) * | 2021-10-08 | 2021-11-09 | 中国重汽集团重庆燃油喷射系统有限公司 | Solenoid valve for dual fuel injector |
| CN113623103B (en) * | 2021-10-08 | 2024-05-10 | 重油高科电控燃油喷射系统有限公司 | Solenoid valve for dual fuel injector |
| CN114151243A (en) * | 2021-11-19 | 2022-03-08 | 哈尔滨工程大学 | Super-atomized ammonia fuel injector |
| CN114151243B (en) * | 2021-11-19 | 2023-07-21 | 哈尔滨工程大学 | Super atomized ammonia fuel injector |
| CN114352453A (en) * | 2022-01-24 | 2022-04-15 | 一汽解放汽车有限公司 | Variable injection rate injector of common rail system, injection control method and automobile |
| CN114352453B (en) * | 2022-01-24 | 2023-01-10 | 一汽解放汽车有限公司 | Variable injection rate injector of common rail system, injection control method and automobile |
| US11713740B1 (en) * | 2022-02-24 | 2023-08-01 | Harbin Engineering University | High-pressure common rail fuel injector capable of achieving highly stable injection based on throttling damping accommodating effect |
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