CN101377181A - Injection nozzle for injecting fuel - Google Patents
Injection nozzle for injecting fuel Download PDFInfo
- Publication number
- CN101377181A CN101377181A CNA2008102142779A CN200810214277A CN101377181A CN 101377181 A CN101377181 A CN 101377181A CN A2008102142779 A CNA2008102142779 A CN A2008102142779A CN 200810214277 A CN200810214277 A CN 200810214277A CN 101377181 A CN101377181 A CN 101377181A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- fuel
- passage
- plunger
- emptying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 99
- 238000002347 injection Methods 0.000 title claims description 35
- 239000007924 injection Substances 0.000 title claims description 35
- 238000002485 combustion reaction Methods 0.000 claims abstract description 21
- 239000007921 spray Substances 0.000 claims description 35
- 238000007664 blowing Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000013011 mating Effects 0.000 claims description 6
- 239000002912 waste gas Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 2
- 238000012986 modification Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- 239000006229 carbon black Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002147 killing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009183 running Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/002—Arrangement of leakage or drain conduits in or from 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0047—Four-way valves or valves with more than four ways
-
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0049—Combined valve units, e.g. for controlling pumping chamber and injection valve
-
- 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
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
-
- 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
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
- F02M63/0215—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine by draining or closing fuel conduits
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a nozzle for jetting fuel. A nozzle for jetting fuel into diesel engine, especially two-stroke large diesel engine comprises a nozzle body (2) and a nozzle head (3) connected on the nozzle body having one ore multiple jetting holes (4.1, 4.2) for jetting fuel into the combustion space of diesel engine. The nozzle further comprises a jetting valve which includes a valve needle (6) disposed in the nozzle body (2) and a valve base (7) connected the jetting holes (4.1, 4.2) through a channel (5.1, 5.2) formed in the nozzle body and the nozzle head; the valve base cooperates with the valve needle to control the fuel supply to the jetting holes., The nozzle comprises additionally devices (15, 16) for emptying the channel (5.1, 5.2) and a pipeline (7) connected with the devices to empty the channel while the nozzle is closed.
Description
Technical field
The present invention relates to a kind of as described in the preamble, nozzle and a kind of diesel engine with at least one this nozzle, especially two-stroke large diesel engine of being used for fuel is sprayed into diesel engine according to claim 1.
Background technique
In the diesel engine of some conventional structures and especially two-stroke large diesel engine, for example be used in the diesel engine of using in boats and ships and the power station, the nozzle that uses comprises nozzle body and is connected nozzle tip, that have one or more spray orifices thereon, so that fuel is sprayed into being arranged in the combustion space in the cylinder of diesel engine.This nozzle also comprises injection valve, and it comprises the needle that is arranged in the nozzle body and by being connected to the valve seat of spray orifice at nozzle body and the passage that forms in nozzle tip, and this valve seat and needle mating reaction are so that control fuel supply to spray orifice.On nozzle has the plunger that is arranged in the cylinder hole that is used for operating needle in addition usually and acts on plunger with as long as the fuel pressure on the nozzle is that the low needle that just will be connected with plunger is pressed on the pressure spring on the valve seat, so that prevent the nozzle water clock.The pressure that nozzle is opened is regulated each nozzle by the pretensioning of spring.
The valve seat of fuel nozzle is arranged away from spray orifice usually, bears the pressure load that produces from high jet pressure because it need obtain enough firm support.This needs corresponding firm mode of structure, and this structure needs sizable space.But because each cylinder is typically provided with a plurality of nozzles, therefore the size that firmly designs the zone that is directly adjacent to the nozzle that the combustion space is provided with owing to the reason in space will be difficult.In addition, cylinder head in two-stroke diesel engine can be cooled in the very thick this zone of nozzle that makes usually hardly, therefore be in operation and be exposed under the unusual temperature, if the valve seat of fuel nozzle is not to arrange away from spray orifice as common.Enough distances between valve seat and the corresponding spray orifice have guaranteed valve seat Tai Re and their all runnings in good condition under all operating conditionss of becoming that can not be in operation.
Because the said structure mode, the fuel quantity that stays in the passage after needle is closed between valve seat and spray orifice is quite big.The fuel of staying in the passage is heated and can overflows in the combustion space owing to pressure reduces during expansion stroke.Carving temperature in the combustion space at this moment, may to drop to such degree be that they can not fully be burnt again.Test shows that the fuel quantity in staying passage has considerable influence to the carbon black effulent of diesel engine.
Described a kind of nozzle in document WO 93/7386, it comprises nozzle tip, has passage and the spray orifice that form is vertical hole and has injection valve, and it comprises valve seat and closure member, is used to open and close the fuel supply of leading to nozzle tip and spray orifice.Nozzle among the WO93/7386 additionally comprises the closing element that is configured to form of sleeve, and it is fixedly connected on the closure member of nozzle, is used to open and close spray orifice.Can prevent in the expansion stage that by this additional closing element fuel from undesirably overflowing from vertical hole of nozzle tip.Between the closure member of injection valve and additional closing element be fixedly coupled in the valve seat that manufacturing tolerances is had very high requirement and injection valve and the variation of the shape of cross section of spray orifice must with mutually accurately coupling so that fuel pressure can not make sleeve exceedingly expand and damage it thus.
Summary of the invention
The purpose of this invention is to provide a kind of being used for sprays into the especially nozzle of two-stroke large diesel engine of diesel engine with fuel, does not need strict coupling between the variation of the variation of the simple and shape of cross section in the valve seat of injection valve of this nozzle manufacturing and the shape of cross section of spray orifice.Another purpose provides a kind of diesel engine with at least one this nozzle, especially two-stroke large diesel engine.
According to the present invention, nozzle and the diesel engine solution by in claim 10 limit of this purpose by in claim 1, limiting.
Fuel is sprayed into diesel engine according to of the present invention being used for, especially the nozzle in the two-stroke large diesel engine, comprise nozzle body and be connected nozzle tip, that have one or more spray orifices thereon, so that fuel is sprayed in the combustion space of diesel engine.Nozzle also comprises injection valve, and it comprises the needle that is arranged in the nozzle body and by being connected to the valve seat of spray orifice at nozzle body and/or the passage that forms in nozzle tip, and this valve seat and needle mating reaction are so that control fuel supply to spray orifice.Also additionally have the device that is used for the emptying passage and be connected to pipeline on this device according to nozzle of the present invention, this pipeline and this channel connection so that when nozzle is closed this passage of emptying.
In a kind of advantageous embodiments, the device that is used for emptying comprises a discharge pipe, and it can be coupled on the pipeline with channel connection so that discharge fuel by this two pipelines.
In a kind of advantageous embodiments, the device that is used for emptying comprises a control guiding valve, and it for example can be arranged between above-mentioned two pipelines, is used for by means of the fuel in the overvoltage discharge route of combustion space.
In the favourable modification of another kind, the device that is used for emptying comprises the cylinder with plunger, is used for receiving from the fuel of passage and/or with fuel discharging.This cylinder respectively has two portion's sections that diameter is different with this plunger that leads movably in this cylinder, wherein this cylinder can be connected to a fuel supply circuit having a larger-diameter side, be connected on the relative side with described channel attached pipeline on.The spring that acts on the plunger can also be set, be used in low fuel pressure or do not have under the fuel pressure plunger moved to a position of rest.
Selectively, the device that is used for the emptying passage can additionally comprise a separator, and SEPARATOR OR SEAL CHAMBER for example is used for waste gas is separated with fuel from passage.
In another advantageous embodiments, the device that is used for emptying can be configured to a kind of blowing out device, is used for blowing out by spray orifice the fuel of passage.Blowing out device for example comprises compressed air cylinder and/or safety check, wherein can supply with by a pressurized air pressurized air is supplied to this compressed air cylinder, and safety check can be coupled to compressed air cylinder or pressurized air is supplied with.Pressurized air supply lines or compressed air cylinder or safety check can alternatively be connected on the pipeline that maybe can be coupled to channel connection.If desired, this blowing out device can comprise a control guiding valve, it for example is connected on pressurized air supply lines and the compressed air cylinder and it for example can be operated by means of the pressure of the fuel of supplying with, so that control is supplied with the pressurized air of compressed air cylinder.
With the foregoing description and modification mutually independently, if desired, this nozzle can also comprise that one is in first plunger that is operatively connected and one with needle and is in second plunger that is operatively connected with first plunger, so that utilize the opening and closing of these two plungers control nozzles.
The present invention also comprises a kind of diesel engine, two-stroke large diesel engine especially, and it has at least one according to the one or more described nozzle for jetting fuel that is used in the foregoing description and the modification.
Owing to have the device that is used for the passage of emptying between valve seat and spray orifice, the passage in can the emptying said nozzle when injection valve cuts out and avoid the undesirable water clock of fuel from passage in spraying the gap.Carbon black effulent that in other cases may the partial combustion of fuel takes place in the expansion stage just can not take place thus.Another advantage is that said nozzle includes only or standarized component and/or the parts that can simply make.
The description of the foregoing description and modification is just as example.Other advantageous embodiments provides in dependent claims and accompanying drawing.In addition within the scope of the invention, the single and feature in the foregoing description and the modification also can make up mutually to form new embodiment.
Description of drawings
Below describe the present invention in detail by means of embodiment and accompanying drawing.In the accompanying drawing:
Fig. 1 is the schematic views according to an embodiment of nozzle of the present invention,
Fig. 2 be according to one second embodiment's of nozzle of the present invention schematic views and
Fig. 3 is the schematic views according to one the 3rd embodiment of nozzle of the present invention.
Embodiment
Fig. 1 shown according to of the present invention being used for fuel sprayed into diesel engine, especially the nozzle in the two-stroke large diesel engine 10 embodiment's schematic views.Nozzle 10 comprises nozzle body 2 and the nozzle tip 3 that is connected thereon, and the latter has one or more spray orifices 4.1,4.2, so that fuel is sprayed in the combustion space of diesel engine.Nozzle also comprises injection valve, it comprises needle 6 and the passage 5.1 by forming that is arranged in nozzle body 2 inside in nozzle body and nozzle tip, 5.2 be connected to the valve seat 7 of spray orifice 4.1,4.2, this valve seat and needle 6 mating reactions in case control to the fuel supply of spray orifice.This embodiment's nozzle also additionally has the device 15,16 of the emptying of being used for passage 5.1,5.2 and is connected to pipeline 17 on this device, this pipeline and channel connection so that when injection valve cuts out this passage of emptying.
In an advantageous embodiments, the device construction that is used for emptying becomes blowing out device 15,16, so that blow out fuel in the passage 5.1,5.2 by being used for spray orifice 4.1,4.2.Blowing out device for example can comprise compressed air cylinder 15 and/or safety check 16, wherein can pressurized air be supplied to this compressed air cylinder by pressurized air supply pipeline 14, and safety check is connected to or can be coupled to compressed air cylinder or pressurized air supply lines 14 on, and pressurized air supply lines 14 or compressed air cylinder 15 or safety check 16 can be connected to or be coupled on the pipeline 17 with channel connection if necessary.The pressurized air of supply with being carried by pressurized air advantageously has a pressure, and this pressure is higher than the pressure in the firing chamber when injection valve cuts out or is higher than pressure maximum in the combustion space.Compressed-air actuated pressure is usually located between 100bar and the 300bar or between 150ar and the 250bar.
In a favourable modification, compressed air cylinder before the course of injection and/or during be filled pressurized air.Passage 5.1 after needle 6 is closed, 5.2 in pressure descend and compressed air cylinder by safety check 16, pipeline 17, passage and spray orifice or a plurality of spray orifice 4.1,4.2 be emptied in the combustion space, thereby discharge and atomizing by means of the fuel that pressurized air advantageously directly will be included in after needle 6 is closed in the passage.
If desired, blowing out device can also comprise control guiding valve 20, it for example can be connected to pressurized air supply lines 14 and compressed air cylinder 15 and for example can operate by means of the pressure of the fuel of supplying with, so that control is supplied with the pressurized air of compressed air cylinder.If guiding valve 20 is operated by means of the pressure of the fuel of supplying with, guiding valve 20 advantageously is connected to a fuel supply circuit 12 ' so, and the latter advantageously also is connected on the fuel supply circuit of injection valve.If desired, control valve 20 can comprise movably a guiding valve 21 and/or a Returnning spring 23.In a preferred variation, blowing out device and/or control guiding valve are arranged in the nozzle 10 or on it.Can when course of injection begins and finish, be connected in short time on the compressed air cylinder 15 by means of control guiding valve 20 pressurized air supply lines 14, so that to this device filling pressurized air.
With the foregoing description and modification mutually independently, nozzle can additionally comprise one first plunger 8.1, it for example is movably disposed within one the first cylinder hole in the nozzle body 2 and is connected in operation with needle 6 or is connected thereto, with one second plunger 8.2, it for example is movably disposed within one the second cylinder hole in the nozzle body 2 and is connected in operation with first plunger or is connected thereto, so that utilize these two plungers to control the opening and closing of injection valves.The diameter of second plunger is usually greater than the diameter of first plunger.First plunger 8.1 for example can load the pressure and second plunger 8.2 of going up the fuel of supplying with by the fuel supply circuit 12 of nozzle for example can apply pressurized air by pressure air circuit 14.If desired, a drain pipeline line 13 can be set and be used for discharge degree in the first plunger zone.In order when killing engine, on needle 12, to apply the power of closing of a minimum, a pressure spring can be set, as in the nozzle of routine, it does not illustrate and can be designed to than a lot weak in the conventional nozzle in Fig. 1 and more saves the space.The preload of pressure spring needs not to be and can regulate, because very little to the influence of the cracking pressure of injection valve.
Surpass and to act on compressed-air actuated on second plunger 8.2 and the power of pressure spring in case of necessity in case act on fuel pressure on first plunger 8.1, injection valve just is opened.Like this, be in operation, the fuel pressure when injection valve is opened, it is also referred to as cracking pressure, can control by means of compressed-air actuated pressure.All nozzles of diesel engine are advantageously supplied with from same pressure air supply lines, thereby can cancel the independent adjusting to air pressure.
Fig. 2 has shown the schematic views according to one second embodiment of nozzle 10 of the present invention.Nozzle 10 comprises nozzle body 2 and the nozzle tip 3 that is connected thereon, and the latter has one or more spray orifices 4.1,4.2, so that fuel is sprayed in the combustion space of diesel engine.Nozzle also comprises injection valve, it comprises needle 6 and the passage 5.1 by forming that is arranged in nozzle body 2 inside in nozzle body and nozzle tip, 5.2 be connected to the valve seat 7 of spray orifice 4.1,4.2, this valve seat and needle 6 mating reactions in case control to the fuel supply of spray orifice.This embodiment's nozzle also additionally has the device 18 of the emptying of being used for passage 5.1,5.2,18a and be connected to pipeline 17 on this device, this pipeline and channel connection, so as when injection valve to cut out this passage of emptying.
In an advantageous embodiments, the device that is used for emptying comprises a discharge pipe 18, it can be coupled on the pipeline 17 that is communicated with passage 5.1,5.2 so that by the fuel in these two pipeline discharge routes with especially by means of the discharge of the overvoltage in combustion space fuel.
As shown in Figure 2, the device that is used for emptying can comprise having plunger 21.1 if desired, 21.2 cylinder 20,20.1, so that from passage, receive and/or discharge fuel, cylinder can respectively have two portion's sections 20.1 that diameter is different with the plunger that can lead movably in cylinder, 20.2 and 21.1,21.2, wherein have a larger-diameter side cylinder can be connected to fuel supply circuit 12 ' be connected at a relative side upper cylinder half with channel attached pipeline 17 on, be used for aspirating and/or receiving the fuel that is enclosed in passage.Can be configured in pipeline 17 in the needle 6 for this reason and/or be connected in the actuating plunger 8 on the needle, so that keep little pipeline volume.In addition, if desired, fuel supply circuit 12 ' can be connected on the fuel supply circuit 12 of nozzle.The spring 23 that acts on the plunger 21.1,21.2 can also be set, be used for low or do not have under the fuel pressure plunger to be moved to position of rest.
In an advantageous embodiments, plunger 21.1,21.2 is along with the rising two of fuel pressure moves down, but needle still closing, thus, if desired, fuel is forced out cylinder and in the inlet passage.When needle is opened because in upper segment and lower section different diameter and since the pressure loss plunger in valve seat 7 still be retained on the lower position.On this position, can provide and being connected of discharge pipe 18, so that to connecting line 17 exhausts by a limiter 18a.For this reason, example as shown in FIG. 2, plunger 21.2 can be provided with passage 22 and cylinder 20.2 can be provided with outlet, it inwardly feeds passage 20.2 on lower position the time, and outwards is connected with limiter 18a.In case fuel pressure descends, at first needle 6 is closed, and plunger 21.1,21.2 is moved to upper position by the pressure that rises in spring 23 and the combustion space then, and fuel is sucked and/or extrudes passage and enter in the cylinder thus.Plunger is retained on the upper position and rises once more up to fuel pressure, that is course of injection next time.If desired another outlet can be set on cylinder, it is connected to discharge pipe 18, is used for discharging the fuel that is sucked or receive from cylinder.
Fig. 3 has shown the schematic views according to one the 3rd embodiment of nozzle 10 of the present invention.Nozzle 10 comprises nozzle body 2 and the nozzle tip 3 that is connected thereon, and the latter has one or more spray orifices 4.1,4.2, so that fuel is sprayed in the combustion space of diesel engine.Nozzle also comprises injection valve, it comprises needle 6 and the passage 5.1 by forming that is arranged in nozzle body 2 inside in nozzle body and nozzle tip, 5.2 be connected to the valve seat 7 of spray orifice 4.1,4.2, this valve seat and needle 6 mating reactions in case control to the fuel supply of spray orifice.This embodiment's nozzle also additionally has the device 18 of the emptying of being used for passage 5.1,5.2,18a, 19,19a, 20 and be connected to pipeline 17 on this device, this pipeline and channel connection so that when injection valve cuts out this passage of emptying.
In an advantageous embodiments, the device that is used for emptying comprises a discharge pipe 18, it can be coupled on the pipeline 17 that is communicated with passage 5.1,5.2 so that by the fuel in these two pipeline discharge routes with especially by means of the discharge of the overvoltage in combustion space fuel.
In an advantageous embodiments, the device that is used for emptying comprises control guiding valve 20, it for example can and for example can be arranged in and passage 5.1 by means of an electromagnet operation, 5.2 between the pipeline 17 and discharge pipe 18 that are communicated with, so that by means of the fuel in the overvoltage discharge route in the combustion space.If desired, control guiding valve 20 can comprise movably a guiding valve 21 and/or a Returnning spring.Control valve 20 can be arranged in the nozzle 10 or on it in case of necessity.
For example can set up connection between passage 5.1,5.2 and the discharge pipe 18 at short notice by mobile guiding valve 21, fuel can come out to enter the discharge pipe from passage thus.
This comes to nothing when course of injection begins, because the pressure in the discharge pipe is corresponding to the pressure in the combustion space.When course of injection finishes in the combustion space or passage in pressure higher, the fuel that is enclosed in thus in the passage is transported in the discharge pipe 18.
With the foregoing description and modification mutually independently, nozzle can additionally comprise one first plunger 8.1 if desired, it for example is movably disposed within one the first cylinder hole in the nozzle body 2 and is connected in operation with needle 6 or is connected thereto, with one second plunger 8.2, it for example is movably disposed within one the second cylinder hole in the nozzle body 2 and is connected in operation with first plunger or is connected thereto, so that utilize these two plungers to control the opening and closing of injection valves.The diameter of second plunger is usually greater than the diameter of first plunger.First plunger 8.1 for example can load the pressure of going up the fuel of supplying with and the fuel supply pipeline 12 ' that second plunger 8.2 for example can be connected to nozzle by a limiter 12a by the fuel supply pipeline 12 of injection valve.The fuel supply pipeline 12 of injection valve also advantageously is connected to the fuel supply pipeline 12 ' of nozzle.The fuel pressure that acts on second plunger is controlled usually, for example by will the fuel that second plunger loads being discharged in the drain pipeline line 13 through control guiding valve 20.Through-current capacity can limit with limiter 12a in this structure.
If desired, a release pipeline can be set in the zone of first plunger 8.1 be used for discharge degree, it is connected to drain pipeline line 13.In order when killing engine, on needle 6, to apply the power of closing of a minimum, a pressure spring can be set, as in the injection valve of routine, it does not illustrate and can be designed to than a lot weak in the conventional injection valve in Fig. 3 and more saves the space.The preload of pressure spring needs not to be adjustable, because very little to the influence of the cracking pressure of injection valve.
The power of closing of needle 6 for example can be by means of fuel pressure and is produced by the pressure spring pretensioning in case of necessity.In case control guiding valve 20 reduces to act on the fuel pressure on second plunger 8.2 and act on fuel pressure on first plunger 8.1 to surpass and to act on power on second plunger 8.2 and that act on the fuel pressure that is reduced of pressure spring in case of necessity, injection valve just is opened.Eliminate by closing control guiding valve 20 that the pressure that acts on second plunger 8.2 reduces and injection valve cuts out.By the switching controls guiding valve, can in this structure, on the short time, set up the connection between passage 5.1,5.2 and the discharge pipe 18, thus can be after needle is closed fuel be transported out from passage and enter in the discharge pipe.
In embodiment who all has discharge pipe and modification, the device that is used for the emptying passage can comprise a separator as for example SEPARATOR OR SEAL CHAMBER 18a, is used for waste gas being separated with fuel from passage and reclaiming in case of necessity.Separator for example can be arranged on before the discharge pipe 18 or can insert wherein in this case.Separator preferably is connected on the discharge pipe 19, as shown in Figure 3, so that draw separated waste gas.If possible, a limiter 19a or a regulator can be set in discharge pipe, so that regulate the pressure in the separator.
Owing in said nozzle, have the device that is used for the passage of emptying between valve seat and spray orifice, can the emptying passage when injection valve cuts out and can avoid fuel water clock subsequently.Can reduce the carbon black discharging of diesel engine thus.
Claims (10)
1. one kind is used for fuel is sprayed into diesel engine, especially the nozzle in the two-stroke large diesel engine, comprise nozzle body (2) and be connected thereon, have one or more spray orifices (4.1,4.2) nozzle tip (3), so that fuel is sprayed in the combustion space of diesel engine, and nozzle also comprises injection valve, it comprises the needle (6) that is arranged in the nozzle body (2) and by at nozzle body and/or the passage (5.1 that forms in nozzle tip, 5.2) be connected to spray orifice (4.1,4.2) valve seat (7), (6) mating reaction of this valve seat and needle so as control to the fuel supply of spray orifice, it is characterized in that, this nozzle also additionally has the emptying of being used for passage (5.1,5.2) device (15,16,18,18a, 19,19a, 20) and be connected to pipeline (17) on this device, this pipeline and this channel connection, so as when nozzle to be closed this passage of emptying.
2. according to the described nozzle of claim 1, it is characterized in that the device that is used for emptying comprises a discharge pipe (18), it can be coupled to the pipeline (17) that is communicated with passage (5.1,5.2) and go up so that discharge fuel by these two pipelines.
3. according to the described nozzle of claim 2, it is characterized in that the device that is used for emptying comprises a control guiding valve (20), be used for by means of the fuel in the overvoltage discharge route (5.1,5.2) of combustion space.
4. according to each described nozzle in the claim 1 to 3, it is characterized in that the device that is used for emptying comprises the cylinder with plunger, be used for receiving and discharge from the fuel in the passage (5.1,5.2) and/or with fuel.
5. according to the described nozzle of claim 4, it is characterized in that, this cylinder (20.1,20.2) and this plunger that in this cylinder, leads movably (21.1,21.2) respectively have the different portion's section of two diameters and wherein this cylinder be connected to a fuel supply circuit (12 ') having a larger-diameter side, with be connected on the relative side with described channel attached pipeline (17) on, wherein be provided with the spring (23) that especially acts on the plunger, be used in low fuel pressure or do not have under the fuel pressure plunger to be moved to position of rest.
6. according to each described nozzle in the claim 2 to 5, it is characterized in that the device that is used for the emptying passage additionally comprises a separator (18a), be used for waste gas is separated with fuel from passage.
7. according to the described nozzle of claim 1, it is characterized in that the device construction that is used for emptying becomes blowing out device (15,16), be used for blowing out fuel in the passage (5.1,5.2) by spray orifice (4.1,4.2).
8. according to the described nozzle of claim 7, it is characterized in that, blowing out device comprises compressed air cylinder (15) and/or safety check (16), wherein can supply with (14) pressurized air is supplied to this compressed air cylinder by a pressurized air, and safety check can be coupled to compressed air cylinder or pressurized air is supplied with, wherein pressurized air supply lines (14) or compressed air cylinder (15) or safety check (16) can additionally be coupled on the pipeline (17) with channel connection, wherein this blowing out device especially comprises a control guiding valve (20), it can be operated by means of the pressure of the fuel of supplying with, so that fuel is supplied with and/or blown out to control to the pressurized air of compressed air cylinder.
9. according to each described nozzle in the aforementioned claim, it is characterized in that, comprise that also one is in first plunger (8.1) that is operatively connected and one with needle (6) and is in second plunger (8.2) that is operatively connected with first plunger, so that utilize the opening and closing of these two plungers control nozzles.
10. a diesel engine, especially two-stroke large diesel engine is characterized in that, have at least one according to the described nozzle of one of claim 1-9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07115450.4 | 2007-08-31 | ||
| EP07115450 | 2007-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101377181A true CN101377181A (en) | 2009-03-04 |
Family
ID=39092796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102142779A Pending CN101377181A (en) | 2007-08-31 | 2008-08-29 | Injection nozzle for injecting fuel |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP2031237B1 (en) |
| JP (1) | JP2009057977A (en) |
| KR (1) | KR20090023103A (en) |
| CN (1) | CN101377181A (en) |
| AT (1) | ATE483108T1 (en) |
| BR (1) | BRPI0803370A2 (en) |
| DE (1) | DE502008001427D1 (en) |
| DK (1) | DK2031237T3 (en) |
| RU (1) | RU2008135270A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018133444A1 (en) * | 2017-01-18 | 2018-07-26 | 江苏易实精密科技股份有限公司 | Guide bushing of diesel high pressure fuel injector |
| CN110226031A (en) * | 2017-01-26 | 2019-09-10 | 埃尔温容克尔研磨技术股份公司 | With the internal combustion engine for having the fuel penetrating nozzle that the medium for promoting burning is inputted to the additional mechanism in combustion chamber |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090012056A (en) * | 2007-07-27 | 2009-02-02 | 베르트질레 슈바이츠 악티엔게젤샤프트 | An injection nozzle for fuel |
| DK201000309A (en) * | 2010-04-15 | 2011-10-16 | Man Diesel & Turbo Filial Tyskland | A fuel valve for large two stroke diesel engines |
| DE102013002758B4 (en) * | 2013-02-19 | 2020-03-19 | Woodward L'orange Gmbh | Flushing procedure for use with a fuel injector |
| WO2023182905A1 (en) * | 2022-03-19 | 2023-09-28 | Антон Васильевич ГОЛУБЕВ | Single-plunger nozzle |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4130351A1 (en) * | 1991-09-12 | 1993-03-18 | Bosch Gmbh Robert | DEVICE FOR INJECTING A FUEL-GAS MIXTURE |
| DK167502B1 (en) | 1991-10-04 | 1993-11-08 | Man B & W Diesel Gmbh | FUEL ENGINE FOR COMBUSTION ENGINES |
| DE19815918A1 (en) * | 1998-04-09 | 1999-10-21 | Man B & W Diesel As | Fuel injector |
| PL1566539T3 (en) * | 2004-02-23 | 2009-05-29 | Waertsilae Nsd Schweiz Ag | Fuel injector |
-
2008
- 2008-07-21 DK DK08160784.8T patent/DK2031237T3/en active
- 2008-07-21 EP EP08160784A patent/EP2031237B1/en not_active Not-in-force
- 2008-07-21 DE DE502008001427T patent/DE502008001427D1/en active Active
- 2008-07-21 AT AT08160784T patent/ATE483108T1/en active
- 2008-08-06 KR KR1020080077015A patent/KR20090023103A/en not_active Application Discontinuation
- 2008-08-29 CN CNA2008102142779A patent/CN101377181A/en active Pending
- 2008-08-29 JP JP2008221042A patent/JP2009057977A/en not_active Abandoned
- 2008-08-29 BR BRPI0803370-6A patent/BRPI0803370A2/en not_active IP Right Cessation
- 2008-08-29 RU RU2008135270/06A patent/RU2008135270A/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018133444A1 (en) * | 2017-01-18 | 2018-07-26 | 江苏易实精密科技股份有限公司 | Guide bushing of diesel high pressure fuel injector |
| CN110226031A (en) * | 2017-01-26 | 2019-09-10 | 埃尔温容克尔研磨技术股份公司 | With the internal combustion engine for having the fuel penetrating nozzle that the medium for promoting burning is inputted to the additional mechanism in combustion chamber |
| CN110226031B (en) * | 2017-01-26 | 2021-08-27 | 埃尔温容克尔研磨技术股份公司 | Internal combustion engine with fuel injection nozzle having additional mechanism for feeding combustion-promoting medium into combustion chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| DE502008001427D1 (en) | 2010-11-11 |
| DK2031237T3 (en) | 2011-01-10 |
| JP2009057977A (en) | 2009-03-19 |
| KR20090023103A (en) | 2009-03-04 |
| EP2031237B1 (en) | 2010-09-29 |
| ATE483108T1 (en) | 2010-10-15 |
| EP2031237A1 (en) | 2009-03-04 |
| RU2008135270A (en) | 2010-03-10 |
| BRPI0803370A2 (en) | 2009-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101377181A (en) | Injection nozzle for injecting fuel | |
| US6601566B2 (en) | Fuel injector with directly controlled dual concentric check and engine using same | |
| CN101354000B (en) | Injection nozzle for fuel | |
| CN100432420C (en) | Injector for fuel injection systems of internal combustion engines, especially direct injection diesel engines | |
| CN100359155C (en) | Dual fuel injection valve and method of operating a dual fuel injection valve | |
| CN101487433B (en) | Fuel injector | |
| CN101506518B (en) | Intensified common rail fuel injection system and method of operating an engine using same | |
| CN103670852B (en) | Dual check fuel injector with single actuator | |
| CN100540881C (en) | Fluid injection nozzle | |
| CN106795839B (en) | Double fuel-fuel injector | |
| CN102003552B (en) | Fuel injector | |
| CN102691605B (en) | Electrically-controlled fuel injector for large diesel engines | |
| JPH02286866A (en) | Fuel injection nozzle | |
| JP5112428B2 (en) | Nozzle assembly, fuel injector and internal combustion engine comprising such an injector | |
| CN107514329A (en) | Double oil input channel fuel injectors | |
| CN103180600B (en) | Fuel-injection valve for an internal combustion engine | |
| CN102770657B (en) | Two-stage fuel injection valve for a diesel engine, comprising a solenoid valve and a shuttle valve | |
| CN101092921A (en) | Fuel injection valve | |
| CN101512139B (en) | Injector for internal combustion engines | |
| CN100464070C (en) | Fuel supply device | |
| CN103534474B (en) | Fuel injection unit and system | |
| CN101059110B (en) | Injection device for internal combustion engine | |
| CN109779802B (en) | Fuel nozzle and fuel injection method for large diesel engine and large diesel engine | |
| CN100594108C (en) | Spray head | |
| CN105756825B (en) | Combined electromagnetic oil spout is pressurized piezoelectricity jet hybrid fuel jet device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20090304 |