CN105756828B - Combined double-pressure electricity hybrid fuel jet device - Google Patents
Combined double-pressure electricity hybrid fuel jet device Download PDFInfo
- Publication number
- CN105756828B CN105756828B CN201610250424.2A CN201610250424A CN105756828B CN 105756828 B CN105756828 B CN 105756828B CN 201610250424 A CN201610250424 A CN 201610250424A CN 105756828 B CN105756828 B CN 105756828B
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- oil
- control valve
- needle
- valve
- fuel
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- 239000000446 fuel Substances 0.000 title claims abstract description 76
- 230000005611 electricity Effects 0.000 title claims abstract description 12
- 239000003921 oil Substances 0.000 claims abstract description 181
- 238000002347 injection Methods 0.000 claims abstract description 66
- 239000007924 injection Substances 0.000 claims abstract description 66
- 239000000295 fuel oil Substances 0.000 claims abstract description 45
- 238000007789 sealing Methods 0.000 claims abstract description 40
- 239000000567 combustion gas Substances 0.000 claims abstract description 20
- 239000002737 fuel gas Substances 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000002199 base oil Substances 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 24
- 230000003068 static effect Effects 0.000 abstract description 5
- 230000009977 dual effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/04—Injectors peculiar thereto
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0251—Details of actuators therefor
- F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/026—Lift valves, i.e. stem operated valves
- F02M21/0263—Inwardly opening single or multi nozzle valves, e.g. needle valves
-
- 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
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/161—Means for adjusting injection-valve lift
-
- 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
- F02M61/1866—Valve seats or member ends having multiple cones
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/16—Sealing of fuel injection apparatus 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/44—Valves, e.g. injectors, with valve bodies arranged side-by-side
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
It is an object of the invention to provide combined double-pressure electricity hybrid fuel jet device, including double piezoelectricity control sections, nozzle segment, inlet channel, oil-feed oil duct etc..The present invention is by gas nozzle and fuel nozzle combination in an injection apparatus shell, and for two nozzles all using the motion of piezoelectric element control needle-valve, needle lift is adjustable, and fuel injection amount and fuel injection rate control accuracy are high；Two nozzles are controlled the injection of fuel oil and combustion gas by two needle-valves respectively, and fuel injection flexibility is high, can realize pure fuel oil service pattern and double fuel mode of operation；Fuel oil at the needle chamber and pintle nozzle match-ing parts of gas nozzle is same oil, and oil pressure is equal, avoids the fuel oil static leakage at pintle nozzle match-ing parts；Gas nozzle fuel sealing combustion gas, is advantageous to avoid combustion gas from leaking by pintle nozzle match-ing parts, improves fuel gas injection pressure and injection rate, improves the dynamic property and fuel economy of engine.
Description
Technical field
The present invention relates to a kind of fuel injection device, specifically engine hybrid fuel jet device.
Background technology
Development engine replacing fuel is that solve energy shortage and problem of environmental pollution effectively one of means.Gas
Fuel substitutes combustion because rich reserves, the cheap advantage such as low with disposal of pollutants turn into the engine with good development prospect
Material.Although discharging cleaning only with a kind of gas engine of gaseous fuel, gases used fuel energy density is low, and fuel disappears
Consumption is big, and use direction is limited；And diesel oil is used as light fluid, when gaseous fuel uses as the dual fuel engine of main fuel
Can flexibly it switch between two kinds of fuel, replacement of fuel rate is high, has preferable dynamic property, economy and emission performance.
Existing in-cylinder direct-jet dual fuel engine uses the gas nozzle and fuel nozzle of electromagnetic control type more, existing
Weak point has：Magnetic valve controller is influenceed by hysteresis loop and magnet coil inductance, and needle-valve response is believed relative to control
Number there is delay, influence control accuracy；Gas nozzle and fuel nozzle are independently mounted on cylinder cap, and size and installation site are by cylinder cap
Limitation；Gas nozzle jacks up needle-valve using pressure gas, but because the compressibility of gas is strong, is unfavorable for realizing the essence of needle valve movement
Really control, fuel gas injection are unstable；Fuel nozzle is by controlling the pressure differential on control piston tip and face of needle seating to realize
Injection Control, moving-mass is big, and response speed is slow, and the high pressure fuel in control chamber and oil holding slot can be to residing for needle-valve back-moving spring
Low-pressure end leakage；In addition, during fuel gas injection, with needle-valve motion combustion gas by the gap between needle-valve and valve body to
The leakage aggravation of magnetic valve end, causes fuel gas injection pressure and injection rate to reduce, and has to the stability of fuel gas injection bad
Influence, have impact on engine power performance and fuel economy.
The content of the invention
It is an object of the invention to provide the combined type of the dynamic property that can effectively improve engine and fuel economy
Double piezoelectricity hybrid fuel jet devices.
The object of the present invention is achieved like this：
Combined double-pressure electricity hybrid fuel jet device of the present invention, it is characterized in that：Including control device shell, injection apparatus
Shell, needle-valve base, the first piezoelectric and the second piezoelectric, control device shell are arranged in injection apparatus shell, pin
Valve base is arranged on below injection apparatus shell, setting oil-feed oil duct and inlet channel in control device shell, outside injection apparatus
First drain tap and the second drain tap are set on shell, and needle-valve base includes first base and second base；
First piezoelectric includes the first piezoelectric element, the first conversion piston, the first control valve, the first control valve
Seat, the first control valve back-moving spring, the first control valve return spring holder, the first needle-valve, the first needle-valve back-moving spring, the first piezoelectricity
Element is arranged in control device shell, sets the first metallic gasket below the first piezoelectric element, and the first conversion piston is stuck in the
On one metallic gasket, the first control valve is set below the first conversion piston, the first control valve is pressed in the first control valve back-moving spring
Upper and the first control valve is located inside the first control valve seat, and the first control valve back-moving spring lower end is supported on the reset of the first control valve
Upper sealing cone, shape between the first control valve return spring holder and the first control valve seat are set on spring base, in the first control valve
Into the first control valve oil pocket, oil back chamber is formed between the first control valve and the first control valve seat, the first control valve oil pocket connection the
One drain tap, the first needle-valve are arranged in first base, and control chamber is formed between the upper end of the first needle-valve and injection apparatus shell,
Control chamber connects oil-feed oil duct by the first oil inlet and connects oil back chamber by oil return opening, and the first needle-valve back-moving spring is placed on the
On one needle-valve, on needle-valve cap, needle-valve cap is located in first base and positioned at injection the apical support of the first needle-valve back-moving spring
Below crust of the device, the lower end of the first needle-valve back-moving spring is supported on the first needle-valve, shape between the first needle-valve and first base
Into oil holding slot, oil holding slot connects oil-feed oil duct by the 3rd oil inlet；
Second piezoelectric includes the second piezoelectric element, the second conversion piston, the second control valve, the second control valve
Seat, the second control valve back-moving spring, the second control valve return spring holder, the second needle-valve, the second needle-valve back-moving spring, gag lever post,
Second piezoelectric element is arranged in control device shell, and the second metallic gasket is set below the second piezoelectric element, and the second conversion is lived
Fork clip sets the second control valve, the second control valve is pressed in the second control valve on the second metallic gasket below the second conversion piston
On back-moving spring and the second control valve is located inside the second control valve seat, and the second control valve back-moving spring lower end is supported on the second control
On valve return spring holder processed, upper sealing cone and lower sealing cone, the second control valve return spring holder are set in the second control valve
The second control valve oil pocket, the second control valve and the second control valve return spring holder below are formed between the second control valve seat
Between formed draining chamber, oil suction chamber is formed between the second control valve and the second control valve seat, oil suction chamber is connected by the second oil inlet
Logical oil-feed oil duct, draining chamber connect the second drain tap, and gag lever post is arranged on below the second control valve return spring holder, under gag lever post
End is enclosed on inside the second needle-valve, and the second needle-valve is arranged in second base, and the second needle-valve back-moving spring is enclosed on outside gag lever post, the
Two needle-valve back-moving spring lower ends are supported on the second needle-valve, and gag lever post and the second needle-valve set central oil passage, gag lever post along axis
Needle chamber is formed between the second needle-valve, central oil passage is respectively communicated with the second control valve oil pocket and needle chamber, the second needle-valve and
Annular sealing strip and pressure tank are formed between two bases respectively, annular sealing strip connects oil-feed oil duct by the 4th oil inlet, held
Indent connects inlet channel.
The present invention can also include：
1st, when the first piezoelectric element is powered, the first piezoelectric element elongation, the first control valve overcomes the first control valve to reset bullet
The spring force of spring is moved downward, and oil return opening connects with oil back chamber, and fuel oil is let out from control chamber by oil return opening, the first control valve oil pocket
Enter in the first drain tap, control chamber fuel pressure reduces, and acts on the fuel oil on the first face of needle seating in oil holding slot, overcomes the
The spring force of one needle-valve back-moving spring jacks up the first needle-valve, fuel oil injection；When first piezoelectric element powers off, the first control valve is answered
The upper sealing surface of first control valve is pressed on the first control valve seat by position spring, and the first control valve oil pocket disconnects with oil return opening, control
Chamber processed is identical with the fuel pressure in oil holding slot, and the first needle-valve presses to first base in the presence of the first needle-valve back-moving spring,
Fuel oil does not spray.
2nd, when the second piezoelectric element is powered, the second piezoelectric element elongation, the second control valve overcomes the second control valve to reset bullet
The hydraulic coupling of fuel oil moves downward in the spring force of spring and the second control valve oil pocket, and the lower sealing surface of the second control valve is pressed on
On two control valve return spring holders, the second control valve oil pocket and the second drain tap disconnect, the second control valve oil pocket and the second oil-feed
Mouth connection, fuel oil are entered in needle chamber from oil-feed oil duct by the second oil inlet, the second control valve oil pocket, central oil passage, fuel oil
Act on the second needle-valve end face, overcome the spring force of the second needle-valve back-moving spring to jack up the second needle-valve, fuel gas injection；Second
When piezoelectric element powers off, the upper sealing surface of the second control valve is pressed on the second control valve seat by the second control valve back-moving spring, the
Two control valve oil pockets and the second oil inlet disconnect, and the second control valve oil pocket connects with the second drain tap, and the fuel oil in needle chamber leads to
Cross central oil passage, the second control valve oil pocket is leaked into the second drain tap, the reduction of needle-valve cavity pressure, the second control valve back-moving spring
Second needle-valve is pressed into second base, combustion gas is not sprayed.
Advantage of the invention is that：The present invention combines gas nozzle and fuel nozzle in an injection apparatus shell,
Structure is simplified, saves installing space；The injection of two nozzles, two noticeable degree two-way fuel, fuel injection flexibility is high,
Pure fuel oil service pattern and double fuel mode of operation can be achieved；Two nozzles are all using the motion of piezoelectric element control needle-valve, needle-valve
Lift is adjustable, and fuel injection amount and fuel injection rate control accuracy are high；Gas nozzle controls needle-valve cavity pressure to realize with fuel oil
The motion of needle-valve, fuel gas injection wild effect caused by needle-valve is opened on combustion gas top is improved, can preferably meet that system is sprayed
Stability requirement；Fuel oil at the needle chamber and pintle nozzle match-ing parts of gas nozzle is same oil, and oil pressure is equal, avoids needle-valve idol
Fuel oil static leakage at part；Fuel nozzle eliminates control piston, the fuel oil direct drive needle valve movement in control chamber, structure
It is compact, response quickly, and needle-valve back-moving spring is arranged in high pressure fuel, avoids fuel oil static leakage；Gas nozzle fires
Oil seal combustion gas, be advantageous to avoid combustion gas from leaking by pintle nozzle match-ing parts, improve fuel gas injection pressure and injection rate, improve
The dynamic property and fuel economy of engine.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is that piezoelectricity of the present invention controls partial schematic diagram；
Fig. 3 is nozzle segment schematic diagram of the present invention.
Embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
With reference to Fig. 1~3, combined double-pressure electricity hybrid fuel jet device of the invention mainly includes double piezoelectricity control sections
3rd, nozzle segment 5, control device shell 1, injection apparatus shell 4, inlet channel 7, oil-feed oil duct 9.Double piezoelectricity control sections 3 by
First piezoelectricity control section 10 and the second piezoelectricity control section 32 form, and the first piezoelectricity control section 10 mainly includes the first piezoelectricity
Element 2, the first metallic gasket 11, first conversion piston 12, the first control valve 13, the first control valve seat 14, the first control valve are answered
Position spring 15, the first control valve return spring holder 18, oil return opening 19, the first control valve oil pocket 16, the first drain tap 17, the second pressure
The collecting of electrical controls 32 mainly include the second piezoelectric element 8, the second metallic gasket 31, second conversion piston 30, the second control valve 29,
Second control valve seat 27, the second control valve back-moving spring 26, the second control valve return spring holder 23, the second oil inlet 28, second
Control valve oil pocket 25, the second drain tap 24, the first piezoelectric element 2 in the first piezoelectricity control section 10 are arranged on outside control device
Inside shell 1, the lower section of the first piezoelectric element 2 sets the first metallic gasket 11, and the first conversion piston 12 is stuck in the first metallic gasket 11
On, the first conversion piston 12 and the first control valve 13 below are pressed on the first control valve back-moving spring 15, the first control valve
13 are arranged on inside the first control valve seat 14, and the lower end of the first control valve back-moving spring 15 is supported on the first control valve return spring holder
On 18, the mounting means of the mounting means of the second piezoelectricity control section 32 and the first piezoelectricity control section 10 is identical, the first control
Valve 13 sets upper sealing cone, and the first control valve oil is formed between the first control valve return spring holder 18 and the first control valve seat 14
Chamber 16, set between the first control valve return spring holder 18 and the first control valve seat 14 using positioning finger setting, the second control valve 29
Sealing cone and lower sealing cone are put, the second control is formed between the second control valve return spring holder 23 and the second control valve seat 27
Valve oil chamber 25 processed, the second oil inlet 28 is provided with the second control valve seat 27, second is provided with the second control valve return spring holder 23
Drain tap 24.Nozzle segment 5 is by fuel nozzle part 33, gas nozzle part 47, needle-valve body fastening nut 6, needle-valve base 37
Composition, fuel nozzle part 33 mainly include the first needle-valve 40, the first needle-valve back-moving spring 38, needle-valve cap 36, the first oil inlet
20th, control chamber 34, the 3rd oil inlet 35, oil holding slot 39, gas nozzle part 47 mainly include the second needle-valve 42, gag lever post 21,
Second needle-valve back-moving spring 22, central oil passage 46, needle chamber 45, pressure tank 41, the 4th oil inlet 44, band 43, the first pin
Valve 40, the second needle-valve 42 are arranged on inside needle-valve base 37, and the first needle-valve 40, the second needle-valve 42 pass through needle-valve body fastening nut 6
It is fixed on injection apparatus shell 4, using positioning finger setting, needle-valve base 37 between needle-valve base 37 and injection apparatus shell 4
And first set the first needle-valve back-moving spring 38 between needle-valve 40, the upper end of the first needle-valve back-moving spring 38 is withstood on needle-valve cap 36,
The lower end of first needle-valve back-moving spring 38 is pressed on the first needle-valve 40, and control is formed between the first needle-valve 40 and injection apparatus shell 4
Chamber 34, forms oil holding slot 39 between the first needle-valve 40 and needle-valve base 37, the inside of injection apparatus shell 4 sets gag lever post 21, limit
The position lower end of bar 21 is enclosed on inside the second needle-valve 42, and the second needle-valve back-moving spring 22 is enclosed on the outer end of gag lever post 21, and the second needle-valve resets
The lower end of spring 22 is supported on the second needle-valve 42, and the needle-valve 42 of gag lever post 21 and second sets central oil passage 46, center oil along axis
Second control valve oil pocket of the connection of road 46 25 and needle chamber 45, form needle chamber 45 between the second needle-valve 42 and injection apparatus shell 4,
Pressure tank 41 is formed between second needle-valve 42 and needle-valve base 37, ring packing is set between the needle-valve 42 of needle-valve base 37 and second
Band 43, band 43 are connected with the 4th oil inlet 44.Oil-feed oil duct 9 separates branch all the way on control device shell 1, and branch leads to
The second oil inlet 28 to be crossed to enter in the second piezoelectricity control section 32, oil-feed oil duct 9 separates three tunnel branches in injection apparatus shell 4,
Branch is entered in control chamber 34 by the first oil inlet 20 all the way, and branch enters oil holding slot 39 by the 3rd oil inlet 35 all the way
In, branch is entered in band 43 by the 4th oil inlet 44 all the way.Inlet channel 7 enters pressure-bearing by injection apparatus shell 4
In groove 41, control chamber 34 is connected with oil return opening 19, and oil return opening 19 is controlled by the upper sealing cone of the first control valve 13 and first
Valve oil chamber 16 connects, and the first control valve oil pocket 16 connects with the first drain tap 17, and the second oil inlet 28 passes through the second control valve 29
Upper sealing cone and the second control valve oil pocket 25 connect, the second control valve oil pocket 25 connects with central oil passage 46, needle chamber 45,
Second control valve oil pocket 25 is connected by the lower sealing cone of the second control valve 29 with the second drain tap 24.
The combined double-pressure electricity hybrid fuel jet device of the present invention mainly includes double piezoelectricity control section 3, nozzle segments
5th, control device shell 1, injection apparatus shell 4, inlet channel 7, oil-feed oil duct 9, double piezoelectricity control sections 3 are by the first voltage control
The piezoelectricity control section 32 of part 10 and second processed forms, and nozzle segment 5 is by fuel nozzle part 33, gas nozzle part 47, pin
Valve body fastening nut 6, needle-valve base 37 form.First control valve 13 sets upper sealing cone, controls fuel oil in control chamber 34 to let out
Oil, the second control valve 29 set upper sealing cone and lower sealing cone, realize fuel oil inlet and outlet of fuel channel in the second control valve oil pocket 25
Between switching, the first metallic gasket 11, the second metallic gasket 31 play a part of isolation, avoid the first piezoelectric element 2 and
Two piezoelectric elements 8 touch the fuel oil that double piezoelectricity control sections 3 leak upwards.First needle-valve back-moving spring 38 is by the first needle-valve 40
Needle-valve base 37 is pressed to, the second needle-valve 42 is pressed to needle-valve base 37, needle-valve base 37 and second by the second needle-valve back-moving spring 22
Annular sealing strip 43 is set between needle-valve 42, is connected by the 4th oil inlet 44 with oil-feed oil duct 9, is sealed and let out by pintle nozzle match-ing parts
The combustion gas of leakage, pressure tank 41 plays a part of stable air pressure, so as to reduce influence of the air pressure fluctuation to fuel gas injection.
When dual fuel engine works, combustion gas enters in pressure tank 41 from inlet channel 7, and fuel oil enters from oil-feed oil duct 9
Hybrid fuel jet device, divide in control device shell 1 for two-way, pass through the second oil inlet 28 all the way and enter the second piezoelectricity and control
In part 32, all the way into injection apparatus shell 4, and it is divided into three tunnels on injection apparatus shell 4, passes through the first oil inlet all the way
20 enter in control chamber 34 and oil return opening 19, are entered all the way by the 3rd oil inlet 35 in oil holding slot 39, entered all the way by the 4th
Hydraulic fluid port 44 enters in band 43.
When first piezoelectric element 2 is powered, the first piezoelectric element 2 extends, and the first control valve 13 overcomes the first control valve to reset
The spring force of spring 15 moves downward, and oil return opening 19 connects with the first control valve oil pocket 16, and fuel oil passes through oil return from control chamber 34
The 19, first control valve oil pocket 16 of mouth is quickly leaked into the first drain tap 17, and the fuel pressure of control chamber 34 reduces rapidly, works as pressure
When being reduced to certain value, the fuel oil that is acted in oil holding slot 39 on the conical surface of first needle-valve 40 overcomes the first needle-valve back-moving spring
38 spring force jacks up the first needle-valve 40, and fuel oil starts to spray.When first piezoelectric element 2 powers off, the first control valve resets bullet
The upper sealing surface of first control valve 13 is pressed on the upper sealing surface of the first control valve seat 14 by spring 15, the first control valve oil pocket 16
No longer connected with oil return opening 19, now control chamber 34 is identical with the fuel pressure in oil holding slot 39, and the first needle-valve 40 is in the first pin
Needle-valve base 37 is pressed in the presence of valve back-moving spring 38, fuel oil does not spray.
When second piezoelectric element 8 is powered, the second piezoelectric element 8 extends, and the second control valve 29 overcomes the second control valve to reset
The hydraulic coupling of fuel oil moves downward in the spring force of spring 26 and the second control valve oil pocket 25, the lower sealing surface of the second control valve 29
It is pressed in the lower sealing surface of the second control valve return spring holder 23, the second control valve oil pocket 25 no longer connects with the second drain tap 24
Logical, the second control valve oil pocket 25 is connected with the second oil inlet 28, and fuel oil is controlled from oil-feed oil duct 9 by the second oil inlet 28, second
Valve oil chamber 25 processed, central oil passage 46 enter in needle chamber 45, and fuel oil is acted on the end face of the second needle-valve 42, overcomes the second needle-valve to answer
The spring force of position spring 22 jacks up the second needle-valve 42, and combustion gas starts to spray.When second piezoelectric element 8 powers off, the second control valve
The upper sealing surface of second control valve 29 is pressed on the upper sealing surface of the second control valve seat 27 by back-moving spring 26, the second control valve
Oil pocket 25 no longer connects with the second oil inlet 28, and the second control valve oil pocket 25 connects with the second drain tap 24, in needle chamber 45
Fuel oil is leaked into the second drain tap 24 by central oil passage 46, the second control valve oil pocket 25, and pressure reduces in needle chamber 45, works as pressure
When power is reduced to certain value, the second needle-valve 42 is pressed to needle-valve base 37 by the second control valve back-moving spring 26, and combustion gas is not sprayed.
Combined double-pressure electricity hybrid fuel jet device has two kinds of mode of operations：The first is that the first needle-valve 40 works, should
Mode of operation is pure fuel injection mode；It is for second that first needle-valve 40 the second needle-valve 42 again of starting working is started working, the work
Operation mode is dual injection mode, and the combustion gas of gas nozzle injection is lighted after the fuel oil compression ignition of fuel nozzle injection.
First piezoelectric element 2, the second piezoelectric element 8 are due to piezo-electric effect deformation, and deformation length reliability is high, fuel injection
Rate control accuracy is high., can be with the shape of flexible modulation the first piezoelectric element 2, the second piezoelectric element 8 by changing conduction time length
Become length, change the first control valve 13, the lift of the second control valve 29, and because the first control valve 13 control fuel oil leaves control
Chamber 34, the second control valve 29 control fuel oil disengaging needle chamber 45, therefore, the first needle-valve 40, the maximum lift of the second needle-valve 42
As the change of conduction time length is adjustable, so as to realize the control of fuel injection amount and fuel gas injection amount.
When dual fuel engine works, control chamber 34 is identical with the fuel pressure in oil holding slot 39, needle chamber 45 and sealing
It is identical with the fuel pressure in 43, avoid the fuel oil static leakage at pintle nozzle match-ing parts；Into the fuel oil of band 43, make accumulation
Combustion gas in pressure tank 41 will not be by the clearance leakage between the second needle-valve 42 and needle-valve base 37, so as to avoid mixing
The combustion gas static leakage of fuel injection device；During the second needle-valve 42 moves, combustion gas is even by needle-valve in pressure tank 41
Part leaks upwards, will not leak at the second needle-valve back-moving spring 22 under the fuel oil effect in band 43, directly avoid
The combustion gas dynamic leakage of hybrid fuel jet device.
As shown in the above description, combined double-pressure electricity hybrid fuel jet device exists gas nozzle and fuel nozzle combination
In one injection apparatus shell, two nozzles all realize the injection of fuel, fuel injection using the motion of piezoelectric element control needle-valve
Stability and flexibility are high, disclosure satisfy that system jet law variability requirements, it is possible to achieve pure fuel oil service pattern and double combustions
Expect mode of operation, meanwhile, gas nozzle utilizes fuel sealing combustion gas, can preferably solve what combustion gas was leaked by pintle nozzle match-ing parts
Problem, the dynamic property and fuel economy of engine can be effectively improved.
Combined double-pressure electricity hybrid fuel jet device of the present invention, by gas nozzle and fuel nozzle combination in an injection
In device, including double piezoelectricity control sections, nozzle segment, inlet channel, oil-feed oil duct etc..Double piezoelectricity control sections are by the first pressure
The collecting of electrical controls and the second piezoelectricity control section composition, nozzle segment are tight by fuel nozzle part, gas nozzle part, needle-valve body
Gu nut, needle-valve base form.Described oil-feed oil duct separates branch all the way on control device shell, and branch enters by second
Hydraulic fluid port enters in the second piezoelectricity control section, and oil-feed oil duct separates three tunnel branches in injection apparatus shell, and branch passes through all the way
One oil inlet enters in control chamber, and branch is entered in oil holding slot by the 3rd oil inlet all the way, and branch passes through the 4th oil-feed all the way
Mouth enters in band；Inlet channel is entered in pressure tank by injection apparatus shell.
First piezoelectricity control section includes the first piezoelectric element and the first control valve.First piezoelectric element is arranged on control and filled
Enclosure to be put, the first metallic gasket is set below the first piezoelectric element, the first conversion piston is stuck on the first metallic gasket, the
One conversion piston and the first control valve below are pressed on the first control valve back-moving spring, and the first control valve is arranged on the first control
Inside valve seat processed, the first control valve back-moving spring lower end is supported on the first control valve return spring holder, the second piezoelectricity control unit
The mounting means and the mounting means of the first piezoelectricity control section divided is identical.
First control valve sets upper sealing cone, and the is formed between the first control valve return spring holder and the first control valve seat
One control valve oil pocket, using positioning finger setting between the first control valve return spring holder and the first control valve seat；Second control valve
Sealing cone and lower sealing cone in setting, the second control is formed between the second control valve return spring holder and the second control valve seat
Valve oil chamber, the second oil inlet is provided with the second control valve seat, the second drain tap is provided with the second control valve return spring holder.
Fuel nozzle part includes the first needle-valve.First needle-valve back-moving spring is set between needle-valve base and the first needle-valve,
First needle-valve back-moving spring upper end is withstood on needle-valve cap, and the first needle-valve back-moving spring lower end is pressed on the first needle-valve, the first needle-valve
Control chamber is formed between injection apparatus shell, oil holding slot is formed between the first needle-valve and needle-valve base.
Gas nozzle part includes gag lever post and the second needle-valve.Gag lever post lower end is enclosed on inside the second needle-valve, the second needle-valve
Back-moving spring is enclosed on gag lever post outer end, and the second needle-valve back-moving spring lower end is supported on the second needle-valve, gag lever post and the second needle-valve
Central oil passage is set along axis, central oil passage connects the second control valve oil pocket and needle chamber, the second needle-valve and injection apparatus shell
Between form needle chamber, pressure tank is formed between the second needle-valve and needle-valve base, ring is set between needle-valve base and the second needle-valve
Shape band, band are connected with the 4th oil inlet.
Control chamber is connected with oil return opening, and oil return opening is connected by the upper sealing cone of the first control valve and the first control valve oil pocket
It is logical, the first control valve oil pocket and the connection of the first drain tap；Second oil inlet passes through the upper sealing cone of the second control valve and second
Control valve oil pocket connects, and the second control valve oil pocket connects with central oil passage, needle chamber, and the second control valve oil pocket passes through the second control
The lower sealing cone of valve connects with the second drain tap.
Claims (3)
1. combined double-pressure electricity hybrid fuel jet device, it is characterized in that：Including control device shell, injection apparatus shell, pin
Valve base, the first piezoelectric and the second piezoelectric, control device shell are arranged in injection apparatus shell, needle-valve base peace
Below injection apparatus shell, oil-feed oil duct and inlet channel are set in control device shell, set on injection apparatus shell
First drain tap and the second drain tap, needle-valve base include first base and second base；
First piezoelectric includes the first piezoelectric element, the first conversion piston, the first control valve, the first control valve seat, the
One control valve back-moving spring, the first control valve return spring holder, the first needle-valve, the first needle-valve back-moving spring, the first piezoelectric element
In control device shell, the first metallic gasket is set, the first conversion piston is stuck in the first gold medal below the first piezoelectric element
Belong to pad on, first conversion piston below set the first control valve, the first control valve be pressed on the first control valve back-moving spring and
First control valve is located inside the first control valve seat, and the first control valve back-moving spring lower end is supported on the first control valve back-moving spring
On seat, upper sealing cone is set in the first control valve, the is formed between the first control valve return spring holder and the first control valve seat
One control valve oil pocket, forms oil back chamber between the first control valve and the first control valve seat, the first control valve oil pocket connection first is let out
Hydraulic fluid port, the first needle-valve are arranged in first base, and control chamber is formed between the upper end of the first needle-valve and injection apparatus shell, are controlled
Chamber connects oil-feed oil duct by the first oil inlet and connects oil back chamber by oil return opening, and the first needle-valve back-moving spring is placed on the first pin
On valve, on needle-valve cap, needle-valve cap is located in first base and is located at injection apparatus the apical support of the first needle-valve back-moving spring
Below shell, the lower end of the first needle-valve back-moving spring is supported on the first needle-valve, is formed and contained between the first needle-valve and first base
Oil groove, oil holding slot connect oil-feed oil duct by the 3rd oil inlet；
Second piezoelectric includes the second piezoelectric element, the second conversion piston, the second control valve, the second control valve seat, the
Two control valve back-moving springs, the second control valve return spring holder, the second needle-valve, the second needle-valve back-moving spring, gag lever post, the second pressure
Electric device is arranged in control device shell, and the second metallic gasket is set below the second piezoelectric element, and the second conversion piston is stuck in
On second metallic gasket, the second control valve is set, the second control valve is pressed in the second control valve and resets bullet below the second conversion piston
On spring and the second control valve is located inside the second control valve seat, and the second control valve back-moving spring lower end is supported on the second control valve and answered
On the spring base of position, upper sealing cone and lower sealing cone, the second control valve return spring holder and second are set in second control valve
Form the second control valve oil pocket between control valve seat, shape between the second control valve and the second control valve return spring holder below
Into draining chamber, oil suction chamber is formed between the second control valve and the second control valve seat, oil suction chamber connects oil-feed by the second oil inlet
Oil duct, draining chamber connect the second drain tap, and gag lever post is arranged on below the second control valve return spring holder, and gag lever post lower end is enclosed on
Inside second needle-valve, the second needle-valve is arranged in second base, and the second needle-valve back-moving spring is enclosed on outside gag lever post, the second needle-valve
Back-moving spring lower end is supported on the second needle-valve, and gag lever post and the second needle-valve set central oil passage, gag lever post and second along axis
Needle chamber is formed between needle-valve, central oil passage is respectively communicated with the second control valve oil pocket and needle chamber, the second needle-valve and second base
Between form annular sealing strip and pressure tank respectively, annular sealing strip passes through the 4th oil inlet and connects oil-feed oil duct, and pressure tank connects
Logical inlet channel.
2. combined double-pressure electricity hybrid fuel jet device according to claim 1, it is characterized in that：First piezoelectric element leads to
When electric, the first piezoelectric element elongation, the first control valve overcomes the spring force of the first control valve back-moving spring to move downward, oil return opening
Connected with oil back chamber, fuel oil is leaked into the first drain tap from control chamber by oil return opening, the first control valve oil pocket, control chamber internal combustion
Oil pressure is reduced, and the fuel oil on the first face of needle seating is acted in oil holding slot, overcomes the spring force of the first needle-valve back-moving spring will
First needle-valve jacks up, fuel oil injection；When first piezoelectric element powers off, the first control valve back-moving spring is by the upper close of the first control valve
Front cover is pressed on the first control valve seat, and the first control valve oil pocket disconnects with oil return opening, the fuel pressure in control chamber and oil holding slot
Identical, the first needle-valve presses to first base in the presence of the first needle-valve back-moving spring, and fuel oil does not spray.
3. combined double-pressure electricity hybrid fuel jet device according to claim 1 or 2, it is characterized in that：Second piezoelectricity member
When part is powered, the second piezoelectric element elongation, the second control valve overcomes spring force and the second control of the second control valve back-moving spring
The hydraulic coupling of valve oil intracavitary fuel oil moves downward, and the lower sealing surface of the second control valve is pressed on the second control valve return spring holder
On, the second control valve oil pocket and the second drain tap disconnect, and the second control valve oil pocket connects with the second oil inlet, and fuel oil is oily from oil-feed
Road is entered in needle chamber by the second oil inlet, the second control valve oil pocket, central oil passage, and fuel oil acts on the second needle-valve end face
On, overcome the spring force of the second needle-valve back-moving spring to jack up the second needle-valve, fuel gas injection；When second piezoelectric element powers off, the
The upper sealing surface of second control valve is pressed on the second control valve seat by two control valve back-moving springs, the second control valve oil pocket and second
Oil inlet disconnects, and the second control valve oil pocket connects with the second drain tap, and the fuel oil in needle chamber passes through central oil passage, the second control
Valve oil chamber is leaked into the second drain tap, and needle-valve cavity pressure reduces, and the second needle-valve is pressed to second by the second control valve back-moving spring
Base, combustion gas are not sprayed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610250424.2A CN105756828B (en) | 2016-04-21 | 2016-04-21 | Combined double-pressure electricity hybrid fuel jet device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610250424.2A CN105756828B (en) | 2016-04-21 | 2016-04-21 | Combined double-pressure electricity hybrid fuel jet device |
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| CN105756828A CN105756828A (en) | 2016-07-13 |
| CN105756828B true CN105756828B (en) | 2018-01-19 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010038110A (en) * | 2008-08-07 | 2010-02-18 | Keihin Corp | Injection valve for gaseous fuel |
| US9376992B2 (en) * | 2012-06-04 | 2016-06-28 | Caterpillar Inc. | Dual fuel injector and fuel system |
| US9068539B2 (en) * | 2012-08-03 | 2015-06-30 | Caterpillar Inc. | Dual check fuel injector and fuel system using same |
| DE102013206177A1 (en) * | 2013-04-09 | 2014-10-09 | Robert Bosch Gmbh | Valve for metering fluid |
| US9206778B2 (en) * | 2013-04-19 | 2015-12-08 | Caterpillar Inc. | Dual fuel injector with F, A and Z orifice control |
| CN205714519U (en) * | 2016-04-21 | 2016-11-23 | 哈尔滨工程大学 | Combined double-pressure electricity hybrid fuel jet device |
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