EP2519368B1 - Verfahren zur herstellung eines kanäle aufweisenden kraftstoffeinspritzelementes sowie kraftstoffeinspritzelement - Google Patents

Verfahren zur herstellung eines kanäle aufweisenden kraftstoffeinspritzelementes sowie kraftstoffeinspritzelement Download PDF

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Publication number
EP2519368B1
EP2519368B1 EP10779492.7A EP10779492A EP2519368B1 EP 2519368 B1 EP2519368 B1 EP 2519368B1 EP 10779492 A EP10779492 A EP 10779492A EP 2519368 B1 EP2519368 B1 EP 2519368B1
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EP
European Patent Office
Prior art keywords
channels
fuel injection
nozzle
fuel
injection nozzle
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.)
Active
Application number
EP10779492.7A
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German (de)
English (en)
French (fr)
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EP2519368A1 (de
Inventor
Arno Friedrichs
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/003—Apparatus or processes for treating or working the shaped or preshaped articles the shaping of preshaped articles, e.g. by bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/26—Extrusion dies
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/004—Article comprising helical form elements
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9007—Ceramic materials
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals

Definitions

  • the invention relates to a method for producing a channel having fuel injection element and a fuel injection element.
  • This fuel injector may be a fuel injector, such as may be used in a fuel injector of a motor vehicle equipped with a gasoline engine or a diesel engine, or an insert for a fuel injector.
  • Fuel injection nozzles have a nozzle body, which is provided in the region of its nozzle tip with one or more channels. Through these channels, fuel is injected into a cylinder chamber of the engine during operation of the vehicle at high pressure.
  • the channel or channels are formed in a straight line such that the fuel is fan-shaped injected into the cylinder chamber. This ensures that mix in the cylinder chamber air and fuel in the desired manner to bring about the combustion processes.
  • the channels provided in the region of the nozzle tip are introduced into the nozzle body, e.g. introduced by eroding or drilling, whereby a number of operations is necessary, which corresponds to the number of channels.
  • a fuel injector is known. This has a valve needle, a valve seat with a valve opening and a metal injection-molded nozzle tip. In the nozzle tip, an injection port is provided which is formed as a fan-shaped slot with a predetermined opening angle. This is intended to ensure that the fuel injector can be produced in a simple manner and inexpensively.
  • a method of manufacturing a nozzle hole plate for an injection nozzle and an injection nozzle equipped with such a nozzle hole plate are known.
  • the nozzle hole plate has an upper surface, a lower surface and a passage.
  • the upper surface and the lower surface each define with the passage edges which are rounded.
  • the surfaces of the rounded edges and both the upper and the lower surfaces are covered with tracks formed by a blasting process.
  • an injector component, a fuel injector and a method for producing an injector component are known.
  • the injector component has at least one fuel channel and is twisted in the circumferential direction, preferably such that both end faces of the injector component facing away from one another have the same relative position to each other before and after twisting.
  • a fuel injection valve which comprises a valve closing body, a spray opening and a swirl module.
  • the swirl module comprises a number of tubular hollow bodies, which are arranged in a bundle parallel to each other and provided with a swirl by the fuel flowing through the fuel channels formed in the hollow bodies to the injection orifice.
  • the object of the invention is to provide a cost-effective and easy to manufacture, channels having fuel injector. This object is achieved by a fuel injector having the features specified in claim 1. Advantageous embodiments and further developments are specified in the dependent claims 2 to 5.
  • the advantages of the invention are in particular that channels of the fuel injection element can be produced simultaneously. This means in comparison to known methods, a significant time savings in introducing the channels in the fuel injection element.
  • the channels produced by means of the described method have an improved surface in comparison with production by means of erosion. With the described method can be further produce very fine channels whose diameter is for example in the range between 0.05 mm and 0.5 mm or even smaller.
  • the channels have different distances from the center axis of the fuel injection element, the larger the distance of the respective channel from the central axis, the greater the exit angle of the channels.
  • This advantageously makes it possible to select the exit angles such that the atomization of the fuel output by the fuel injection element into the cylinder chamber of the motor vehicle is improved in comparison to the prior art.
  • the channels of a nozzle can also have different diameters. As a result, the mixing of the fuel with air is improved, which in turn results in an improved combustion process, which causes a lower carbon dioxide emissions than known fuel injection elements.
  • a fuel injector according to the invention is advantageously a fuel injector or insert for a fuel injector. It can be made of carbide, ceramic or steel. Such a fuel injection element is relatively easy to produce, keeps the high demands in operation without further notice and has a long service life.
  • the FIG. 1 shows a sketch of a longitudinal section through a fuel injection nozzle for illustrating a first embodiment of the invention.
  • the fuel injection nozzle 1 shown has a nozzle body 2 which is provided with an insert 3 in the region of the nozzle tip 2a.
  • This insert 3 which is a fuel injection element, is in the form of a plate, is made of hard metal, ceramic or steel and is firmly connected to the nozzle body, for example by positive engagement, screwing, shrinking or sintering.
  • the insert 3 has through channels which connect the nozzle interior 7 of the fuel injection nozzle 1 with the interior 8 of a cylinder of the engine. Through these channels fuel, which is under high pressure in the nozzle interior 7, injected into the cylinder chamber 8 respectively.
  • FIG. 2 shows a sketch of a longitudinal section through a fuel injection nozzle for illustrating a second embodiment of a fuel injection nozzle.
  • the illustrated fuel injector 1 in which it is a fuel injection element, has a nozzle body 2, which has continuous channels in the region of the nozzle tip 2a. These connect the nozzle interior 7 of the fuel injection nozzle 1 with the interior 8 of a cylinder of the engine. Through these channels fuel, which is located under high pressure in the nozzle interior 7, injected into the cylinder chamber 8 respectively.
  • the channels of which in the FIG. 2 only two are shown and designated by the reference numerals 4 and 5, each helically extending through the region of the nozzle tip 2a.
  • This helical course is selected such that the fuel exits the nozzle body 2 at one or more desired angles.
  • an improved distribution of the fuel in the cylinder space and thereby an improved atomization of the fuel can be achieved. This in turn improves the mixing of the fuel with air within the respective cylinder and thereby the combustion process.
  • the nozzle body 2 is formed in one piece in this second embodiment and consists of hard metal, ceramic or steel.
  • FIG. 3 shows a sectional view of the fuel injection nozzle according to the FIG. 2 in the direction of in the FIG. 2 It can be seen that the fuel injection nozzle in the region of its nozzle tip has a plurality of channels whose inputs are approximately evenly distributed in the region of the nozzle tip.
  • FIG. 4 shows a flowchart for illustrating a method for producing a channels having fuel injector.
  • a production of a consisting of a plastic material, rectilinear channels having body by means of an extrusion tool is a hard metal powder provided with a plasticizer, ceramic powder provided with a plasticizer, or steel powder provided with a plasticizer.
  • the extrusion tool in its interior, for example, a thread holder on which threads are attached, which extend into the region of the nozzle tip of the extrusion die and serve as a placeholder of the channels for the pressed by the extrusion die plastic material flow.
  • the rectilinear passageway body is twisted to provide a plastic material body having helically extending channels.
  • This twisting is preferably accomplished by rotatably forming the nozzle tip of the extrusion die and rotating it during the extrusion process.
  • the plastic material leaving the extruder train, which already has the helically extending channels, is sintered outside the extrusion die in a step S3.
  • the sintered body is then cut to length in a step S4 to provide a helically extending fuel injection element.
  • step S2 An alternative is to cause the twisting occurring in step S2 by first cutting the bar-shaped plastic material leaving the extrusion tool outside the extrusion die and then subjecting it to twisting, supporting it over its entire length on a support is subjected to a rolling movement by means of a friction surface arrangement whose velocity is linear over the length of the body and constantly changing.
  • This twisted body is subsequently sintered in a step 3 and thereafter cut to length in a step S4 to provide fuel injection elements in the form of inserts 3, as illustrated with reference to the figure.
  • the sintered and cut body can be subjected to further processing if necessary, for example, a grinding process.
  • the method described above with reference to exemplary embodiments enables simplified production of fuel injection elements having fuel injection channels. Further, the extrusion process used not only provides an improved surface area of the channels, but also allows all channels to be manufactured in a single operation. These channels can advantageously also have different diameters. Furthermore, very fine channels can be produced by means of the method described, the diameter of which may be in the range between 0.5 mm and 0.05 mm, or may even be smaller if required.
  • the exit angle of the channels from the fuel injector increases with increasing distance of the respective channel from the central axis of the element. Channels located near the central axis eject the fuel substantially in the direction of the central axis. With increasing distance of the channels from the central axis of an ejection of the fuel takes place at an angle which deviates increasingly from the direction of the central axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Fuel-Injection Apparatus (AREA)
EP10779492.7A 2009-12-29 2010-10-29 Verfahren zur herstellung eines kanäle aufweisenden kraftstoffeinspritzelementes sowie kraftstoffeinspritzelement Active EP2519368B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009060844A DE102009060844A1 (de) 2009-12-29 2009-12-29 Verfahren zur Herstellung eines Kanäle aufweisenden Kraftstoffeinspritzelementes sowie Kraftstoffeinspritzelement
PCT/EP2010/066444 WO2011079979A1 (de) 2009-12-29 2010-10-29 Verfahren zur herstellung eines kanäle aufweisenden kraftstoffeinspritzelementes sowie kraftstoffeinspritzelement

Publications (2)

Publication Number Publication Date
EP2519368A1 EP2519368A1 (de) 2012-11-07
EP2519368B1 true EP2519368B1 (de) 2018-03-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10779492.7A Active EP2519368B1 (de) 2009-12-29 2010-10-29 Verfahren zur herstellung eines kanäle aufweisenden kraftstoffeinspritzelementes sowie kraftstoffeinspritzelement

Country Status (8)

Country Link
US (1) US9662709B2 (es)
EP (1) EP2519368B1 (es)
JP (1) JP6037839B2 (es)
KR (1) KR101721420B1 (es)
CN (1) CN102712043B (es)
DE (1) DE102009060844A1 (es)
ES (1) ES2672786T3 (es)
WO (1) WO2011079979A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013018146B4 (de) 2013-12-04 2021-02-25 Arianegroup Gmbh Einspritzelement für eine Raketenbrennkammer
US10060402B2 (en) 2014-03-10 2018-08-28 G.W. Lisk Company, Inc. Injector valve
US10036356B2 (en) 2015-04-13 2018-07-31 Caterpillar Inc. Ducted combustion systems utilizing duct-exit tabs
CN112412677B (zh) * 2020-11-26 2022-01-11 北京理工大学 一种高强化柴油机卷流喷嘴

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Also Published As

Publication number Publication date
KR101721420B1 (ko) 2017-03-30
CN102712043B (zh) 2014-12-10
EP2519368A1 (de) 2012-11-07
WO2011079979A1 (de) 2011-07-07
DE102009060844A1 (de) 2011-06-30
JP2013515908A (ja) 2013-05-09
ES2672786T3 (es) 2018-06-18
JP6037839B2 (ja) 2016-12-07
US20120261497A1 (en) 2012-10-18
US9662709B2 (en) 2017-05-30
KR20120112667A (ko) 2012-10-11
CN102712043A (zh) 2012-10-03

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