EP4146926A1 - Buse d'injection et dispositif de chargement d'un combustible avec du gaz - Google Patents

Buse d'injection et dispositif de chargement d'un combustible avec du gaz

Info

Publication number
EP4146926A1
EP4146926A1 EP21724570.3A EP21724570A EP4146926A1 EP 4146926 A1 EP4146926 A1 EP 4146926A1 EP 21724570 A EP21724570 A EP 21724570A EP 4146926 A1 EP4146926 A1 EP 4146926A1
Authority
EP
European Patent Office
Prior art keywords
fuel
gas
injection nozzle
diffusion
diffusion device
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
Application number
EP21724570.3A
Other languages
German (de)
English (en)
Inventor
Hartmut Schiefer
Felix Schiefer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP4146926A1 publication Critical patent/EP4146926A1/fr
Pending legal-status Critical Current

Links

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
    • F02M67/00—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type
    • F02M67/10—Injectors peculiar thereto, e.g. valve less 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
    • F02M61/18—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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/27—Fuel-injection apparatus with filters
    • 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
    • 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
    • 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
    • F02M2200/9092—Sintered materials

Definitions

  • the invention relates to an injection nozzle and an apparatus / device connected directly or indirectly to it for loading the fuel by diffusion / permeation with gas, hereinafter referred to as diffusion device, preferably air or air and exhaust gas.
  • diffusion device preferably air or air and exhaust gas.
  • an open injection nozzle is known from US Pat. No. 5,150,836, in which the fuel is conveyed to the engine by a pulse by means of an individual amount of gas. The pressure and the amount of gas are sufficient to deliver the fuel out of the nozzle at almost the speed of sound.
  • GB 1459097 lists a gas atomizing nozzle in which the liquid and gas are brought together at a focal point via spiral channels.
  • diesel fuel is evaporated via an evaporator tube which contains a glow plug and mixed with intake air, in particular for operating a starting aid system for engines that work in particular with vegetable oils.
  • the diesel operation should only take place until the engine operating temperature is reached.
  • DE 213349 describes an internal combustion engine which is operated in a first operating state with different liquid fuels (diesel, etc.) and in a second operating state with gas.
  • DE 809 describes an injector which has openings in two planes, the fuel being expelled through these openings and thereby mixing.
  • EP 3058208 claims a liquid injector for generating atomized liquid, the pressurized liquid and the gas being directed to adjacent focal points and colliding.
  • EP1647685 is an internal combustion engine that works with two types of fuel, at least a first type of fuel, then a second type of fuel being supplied by changing and a fuel mixing ratio being set as a function of the fuel volume conveyed.
  • the aim of the invention is to homogenize the fuel distribution and the distribution density in the diesel process and thereby influence the combustion process in such a way that the fuel burns as completely as possible and little or no soot is produced. At the same time, the fuel is better converted into mechanical energy.
  • the invention consists of an injection nozzle and a diffusion device connected directly or indirectly to it for loading the fuel, usually diesel fuel with gas, preferably with air or exhaust gas as well as air and exhaust gas.
  • the fuel is loaded with gas in the diffusion device via gas filters, preferably membranes made of sintered metal (sintered metal filter) or ceramic filters.
  • the membrane (semipermeable membrane) has a pore size that allows the gas to pass through and to hold back the fuel when it is idle. In the working state, the gas is given a higher pressure than the pressure in the fuel.
  • the flow resistance of the membrane depends on the pore size and pore length.
  • the aforementioned fuels and gas show almost a purely viscous behavior.
  • the viscosity ratio is therefore decisive for the flow through the respective components.
  • the viscosity ratio of diesel to air under normal conditions is greater than 10 4 . No diesel will flow through the membrane under these conditions.
  • the parameters permeation area and thickness, gas pressure and fuel pressure are designed so that the required amount of gas is absorbed by the fuel by diffusion.
  • the dissolved gas causes the droplets emerging from the injection nozzle to burst spontaneously due to the internal gas pressure after the pressure has been released in the compression chamber, which leads to a very fine and even distribution of the fuel.
  • the homogeneous combustion can also reduce the excess air during combustion and the formation of NO x through exhaust gas recirculation.
  • the diffusion of the gas into the fuel is a surface and time process, which is why the surface-volume ratio of the fuel when flowing through the diffusion device is made as large as possible.
  • the required gas pressure is determined from the pressure loss for gas passage through the membrane (viscous pressure loss) and the required and specified pressure for the diffusion of the gas (diffusion pressure gradient).
  • the saturation volume for gas is proportional to the diffusion pressure over a wide range (Dalton's law).
  • the overpressure in relation to the injection pressure is selected depending on the gas requirement in the fuel.
  • the present invention is implemented both in the configuration of the injection nozzle according to the invention and in the independent method for injecting fuel, which can advantageously also be implemented as a method for operating the injection nozzle according to the invention.
  • Analogous to the further refinements of the injection nozzle, associated operating modes and modes of operation of the nozzle apply as disclosed in a further development of the method according to the invention.
  • a variant which develops the method according to the invention in a particularly elegant and effective manner results from the injection of the loaded fuel into a compression chamber or injection chamber which has or forms a vacuum at least at the time of injection.
  • the concrete realization of such a vacuum for the injection chamber results from the German utility model publication DE 202020 002 930 U1, which is included in the present disclosure as belonging to the invention with regard to the constructive realization of this vacuum in the compression or injection chamber and the realization of the fuel injection should apply; the present inventive loading of the fuel in connection with the vacuum leads to a further improved fuel distribution including further reduced droplet diameters after the injection. The result is a further improved combustion with a positive influence on the emission behavior.
  • Fig. 1 shows a schematic representation of the injection nozzle with a directly connected diffusion unit.
  • FIG. 2 also shows, in a schematic representation, the injection nozzle with an indirect connection to the diffusion unit.
  • 3 shows a schematic representation of the section through the diffusion device when the gas is diffused into the fuel from one side.
  • 4 shows the section through a region of the diffusion device with the gas being fed into the fuel from two sides.
  • the injection nozzle 1 is directly connected to the diffusion device 2, they form a structural unit.
  • the supply line 3 supplies the gas with the required pressure and line 4 supplies the fuel via the diffusion device 2 to the nozzle.
  • the advantage of this arrangement is that the loading of the fuel with gas can be dynamically adapted to certain requirements.
  • FIG. 2 shows the injection nozzle 5, which is connected to the diffusion device 6 via a line 9.
  • the feed lines 7 and 8 on the diffusion device 6 provide the gas and the fuel.
  • the line 9 feeds the gas-enriched fuel to the nozzle. It is advantageous here that there is a larger amount of the gas-enriched fuel in the line 9, which ensures a stable supply to the nozzle when there is a dynamic fuel requirement.
  • the supply of the nozzle with fuel by a diffusion device in which gas is supplied by diffusion can also take place in such a way that more than one diffusion device, not shown in FIGS. 1 and 2, supply the nozzle with gas-enriched fuel and in the same way
  • a diffusion device can also supply several nozzles with the gas-enriched fuel.
  • Fig. 3 the cut diffusion device 10 is shown schematically. Inside this device, the gas is introduced in area 12.
  • the tubular geometry 11 shows the microporous wall (semipermeable wall).
  • the outer tubular geometry 14 is arranged around this tube, the fuel flowing in the space 13 between the outer wall 14 and the outer geometry of the microporous wall.
  • the microporous wall in the example made of sintered stainless steel, CrNi steel, has a porosity, depending on the dimensions and operating conditions, which allows the necessary gas components to pass through, and on the other hand prevents the fuel, preferably diesel fuel, from diffusing through the microporous wall. This is ruled out due to the higher gas pressure compared to the fuel pressure and the significantly higher viscosity of the fuel compared to the diffusing gases air or exhaust gas.
  • the gas can also be fed into the fuel in the region 18 via the microporous walls 17 and 19, respectively.
  • the areas 16 and 20 provide the gas for diffusion.
  • the microporous wall can also be designed in such a way that the selected topography increases the surface area with the same radius, for example, achieved in that the surface is corrugated, interlocked or otherwise designed to enlarge the surface.
  • the design of the diffusion device is not tied to tubular geometries; rather, other cross-sections, such as, for example, rectangular geometries or elliptical cross-sections, can also be used.
  • diesel fuel is a preferred embodiment of the fuel according to the invention, but the invention is not limited to this; rather, any fuels that can be charged with the gas according to the invention, including gasoline or gasoline fuels of different octane numbers, synthetic fuels, methanol, are suitable within the scope of the invention , Ethanol, biodiesel, vegetable oils and suitable mixtures of these.
  • the gas supplied to the fuel by diffusion is advantageously air and / or exhaust gas
  • the gas according to the invention is not limited to this. Rather, almost any other gases or gas mixtures are possible, which can be introduced into the fuel within the meaning of the invention and then lead to spontaneous bursting of the droplets after injection into the compression chamber, with the advantageous effect according to the invention on the fuel distribution and droplet size.
  • gases or gas mixtures are used.
  • gas mixtures are fed to the fuel as gas of different composition.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne une buse d'injection (1) pour combustible, de préférence pour combustible diesel, un dispositif de diffusion (2) destiné à fournir du gaz au combustible par diffusion, étant relié indirectement ou directement à la buse.
EP21724570.3A 2020-05-05 2021-04-30 Buse d'injection et dispositif de chargement d'un combustible avec du gaz Pending EP4146926A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020002684.2A DE102020002684A1 (de) 2020-05-05 2020-05-05 Einspritzdüse und Vorrichtung zur Beladung eines Kraftstoffes mit Gas
PCT/EP2021/000055 WO2021223899A1 (fr) 2020-05-05 2021-04-30 Buse d'injection et dispositif de chargement d'un combustible avec du gaz

Publications (1)

Publication Number Publication Date
EP4146926A1 true EP4146926A1 (fr) 2023-03-15

Family

ID=75887983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21724570.3A Pending EP4146926A1 (fr) 2020-05-05 2021-04-30 Buse d'injection et dispositif de chargement d'un combustible avec du gaz

Country Status (3)

Country Link
EP (1) EP4146926A1 (fr)
DE (1) DE102020002684A1 (fr)
WO (1) WO2021223899A1 (fr)

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE213349C (fr)
DE100107C (fr)
DE112337C (fr)
DE17561C (de) Th. GEIFFERT & CO. in Altenburg Pflasterpresse
DE314252C (fr)
DE809C (de) 1877-10-09 W Motz Zerlegbarer Manschettenknopf
GB1459097A (en) 1973-11-08 1976-12-22 Tamai S Gas-atomizing nozzle
US5150836A (en) 1981-12-31 1992-09-29 Orbital Engine Company Proprietary Limited Method of fuel injection
DE19713377A1 (de) 1997-04-01 1998-10-15 Siemens Ag Düse, Verwendung einer Düse und Verfahren zur Eindüsung eines ersten Fluids in ein zweites Fluid
DE19815042A1 (de) 1998-04-03 1999-10-07 Deutz Ag Starthilfesystem für eine selbstzündende Brennkraftmaschine
NL1016779C2 (nl) 2000-12-02 2002-06-04 Cornelis Johannes Maria V Rijn Matrijs, werkwijze voor het vervaardigen van precisieproducten met behulp van een matrijs, alsmede precisieproducten, in het bijzonder microzeven en membraanfilters, vervaardigd met een dergelijke matrijs.
EP1243776B1 (fr) 2001-03-13 2005-05-04 Etra S.p.A. Ecologic Transportation Systems Système de commande combinée d'alimentation de bi-carburant pour moteur à cycle diesel
DE102004050602B4 (de) 2004-10-15 2010-05-20 Kangler, Wolfram, Dipl.-Phys. Verfahren zur Verifikation zumindest eines vorgegebenen Kraftstoffmischungsverhältnisses
CN101268273B (zh) 2005-04-06 2012-01-18 通用汽车环球科技运作公司 用于减少烟灰排放的喷射器双列簇配置
DE102007017561A1 (de) 2007-04-12 2008-10-16 Cornelis Hendrik Heim Verfahren und Vorrichtung zur gemeinsamen Verbrennung von Dieselkraftstoff und brennbarem Gas
DE102009048223A1 (de) * 2009-10-05 2011-06-16 Fachhochschule Trier Verfahren zur In-Situ-Herstellung von Treibstoff-Wasser-Gemischen in Verbrennungsmotoren
CN102182587B (zh) * 2011-03-24 2013-03-20 路辉 一种可实现燃油、水、空气三项混合雾化的节油装置
KR101338719B1 (ko) 2011-12-15 2013-12-06 현대자동차주식회사 디젤-가솔린 복합연료 엔진 및 이의 예혼합 압축 착화 혼합 연소 제어방법
DE202012100107U1 (de) 2012-01-12 2012-03-01 Stefano Alberti Nachrüstsystem eines Dieselmotors für den Mischbetrieb mit Gaskraftstoff
DE102013213349B4 (de) 2013-03-28 2017-10-05 Mtu Friedrichshafen Gmbh Verfahren zum Betrieb einer Dual-Fuel-Brennkraftmaschine, Regelung für eine Dual-Fuel-Brennkraftmaschine und Dual-Fuel-Brennkraftmaschine
WO2015057801A1 (fr) 2013-10-15 2015-04-23 Nostrum Energy Pte. Ltd. Injecteur d'atomisation de fluide assisté au gaz
DE102015216727A1 (de) 2015-09-02 2017-03-02 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Einspritzen einer Kraftstoff-Wasser-Emulsion in einen Verbrennungsmotor
DE102016118029A1 (de) * 2015-09-23 2017-03-23 Volkswagen Ag Mischkammer-Konzept eines Kraftstoff-Gemischbildungssystems für eine Brennkraftmaschine
DE102018219935A1 (de) 2018-11-21 2020-05-28 Robert Bosch Gmbh Verfahren und Vorrichtung zur Versorgung eines Verbrennungsmotors mit kryogenem Kraftstoff
DE202020002930U1 (de) 2020-07-09 2020-07-31 Hartmut Schiefer Kraftstoffeinspritzung im Verbrennungsmotor

Also Published As

Publication number Publication date
DE102020002684A1 (de) 2021-11-11
WO2021223899A1 (fr) 2021-11-11

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