EP0844387B1 - Vorrichtung und Verfahren zur luftunterstützen Kraftstoffeinspritzung - Google Patents
Vorrichtung und Verfahren zur luftunterstützen Kraftstoffeinspritzung Download PDFInfo
- Publication number
- EP0844387B1 EP0844387B1 EP97118597A EP97118597A EP0844387B1 EP 0844387 B1 EP0844387 B1 EP 0844387B1 EP 97118597 A EP97118597 A EP 97118597A EP 97118597 A EP97118597 A EP 97118597A EP 0844387 B1 EP0844387 B1 EP 0844387B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- gas
- air
- exhaust
- outlet orifice
- 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.)
- Expired - Lifetime
Links
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
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
- F02M53/04—Injectors with heating, cooling, or thermally-insulating means
- F02M53/06—Injectors with heating, cooling, or thermally-insulating means with fuel-heating means, e.g. for vaporising
-
- 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
- F02M67/02—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 the gas being compressed air, e.g. compressed in pumps
-
- 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
- F02M67/06—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 the gas being other than air, e.g. steam, combustion gas
-
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/04—Injectors peculiar thereto
- F02M69/047—Injectors peculiar thereto injectors with air chambers, e.g. communicating with atmosphere for aerating the nozzles
-
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/08—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by the fuel being carried by compressed air into main stream of combustion-air
Definitions
- the invention relates to a device for injecting fuel into a combustion chamber an internal combustion engine, in particular a motor vehicle, with a mixing chamber Fuel supply means and first gas supply means, wherein also an outlet opening for a fuel-gas mixture is provided.
- the present invention further relates to a method for injecting fuel into a combustion chamber of an internal combustion engine, in particular of a motor vehicle.
- DE-A1-44 22 331 discloses a device for air-assisted fuel injection in an intake manifold of an internal combustion engine, whereby to optimize the atomization the fuel is an air supply with several, radially aligned, in a cross-sectional plane air ducts running in a mixing chamber are provided. The axes of the air ducts intersect at an angle deviating from 180 degrees.
- SAE paper no. 920294 describes an adapter for air-assisted fuel injection, following a mixing room for air and fuel, another flow channel for a the resulting fuel-air mixture is divided in two.
- DE-OS-1933514 describes a fuel injection system for internal combustion engines, which has a fuel nozzle coaxial with an atomizer nozzle.
- the atomizer nozzle is formed in an inner end wall of a sleeve and so great that the not yet atomized fuel jet can enter it, but on the other hand small enough so that the air drawn in from an annular duct atomizes the fuel caused.
- U.S. Patent 5,409,169 describes an electronic air assisted fuel injection described in the fuel via radial grooves in a swirl element in a fuel swirl chamber is initiated. It is used to atomize fuel into fine droplets an air swirl chamber arranged after the fuel swirl chamber, the Compressed air is supplied. The swirled airflow cuts the swirled one Fuel flow.
- EP-B1-0 158 739 describes a device for injecting fuel into combustion chambers described, wherein a heating element is provided after an injection nozzle and an air jacket a fuel jet directed through the heating element before contacting it shields. The air is drawn in by the fuel jet from the combustion chamber. The Heating element is used to heat the fuel for easy flammability in one subsequent combustion.
- EP-A1-0 188 743 describes a device for injecting fuel into a combustion chamber of an internal combustion engine with an injection nozzle and a downstream Mantles. Air drawn in by the fuel jet from the combustion chamber shields the fuel jet before touching the incandescent body.
- the present invention is therefore based on the object of a device and a To provide methods of the type mentioned above, an extremely fine Fuel spray should be available.
- second gas supply means at the outlet opening are provided.
- At least one of the first or second gas supply means advantageously leads Assign an exhaust gas to the internal combustion engine.
- a particularly effective inclusion of the fuel-gas mixture is achieved in that the second gas supply means encloses the outlet opening, in particular encloses in a ring.
- the outlet opening is advantageously arranged on the mixing chamber and the Outlet opens towards the combustion chamber. This achieves a special efficient influencing of the fuel jet even after leaving the Injector.
- the outlet opening is a nozzle outlet opening and arranged in particular in a funnel-shaped element.
- the device has means that the device and / or a nozzle of this device at least partially electrically, with Exhaust gases or by supplying coolant to the internal combustion engine heating, you can achieve an additional under- ... Support the subsequent combustion process by increasing the flammability of the fuel-gas mixture.
- a mixing chamber 10 is provided, the fuel 12 and air a first air supply 14 is fed. Above the mixing chamber is in one holder 18 arranged for the fuel supply, an injection valve, not shown.
- the Mixing chamber 10 tapers conically in the direction of flow and the air of the first air supply 14 mixes with the fuel 12 to form a fuel-gas mixture. This is pressed in the direction of a combustion chamber via a nozzle outlet opening 22.
- annular groove or an annular gap 24 arranged, which or which is connected to a second air supply 16.
- the air emerging from this gap 22 surrounds the air emerging from the nozzle outlet opening 22 escaping fuel-gas mixture ring-shaped. This supporting air ensures that the air is enclosed of the fuel-air mixture.
- the spray cone is thereby additionally in the outlet 22 of the Constricted nozzle. This significantly reduces wall wetting with fuel or takes place significantly later than in conventional air-assisted injections.
- Both the first 14 and the second air supply 16 are from an air or exhaust gas supply 26 fed.
- the supply of exhaust gas or air takes place, for example, with the aid of the with a throttled engine differential pressure, with a compressor or with the help of an existing secondary pump.
- a direct or indirect heating is particularly advantageous the nozzle or its immediate vicinity. This can, for example electrically, through the above-mentioned exhaust gas recirculation or by additional supply of heated coolant of the internal combustion engine.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
Claims (16)
- Vorrichtung zum Einspritzen von Kraftstoff (12) in eine Brennkraftmaschine, insbesondere eines Kraftfahrzeuges, mit einer Mischkammer (10) mit Kraftstoffzuführmitteln und ersten Gaszuführmitteln (14) sowie einer Austrittsöffnung (22) für ein Kraftstoff-Gas-Gemisch, wobei an der Austrittsöffnung (22) zweite Gaszuführmittel (16) vorgesehen sind, dadurch gekennzeichnet, dass wenigstens eines der Gaszuführmittel (14, 16) ein Abgas der Brennkraftmaschine zuführt.
- Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß
das erste oder zweite Gaszuführmittel (14) Luft und/oder Abgas zuführt. - Vorrichtung nach wenigstens einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
das zweite Gaszuführmittel (16) die Austrittsöffnung (22) umschließt. - Vorrichtung nach wenigstens einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
das zweite Gaszuführmittel (16) die Austrittsöffnung (22) ringförmig umschließt. - Vorrichtung nach wenigstens einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
die Austrittsöffnung (22) an der Mischkammer (10) angeordnet ist. - Vorrichtung nach wenigstens einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
die Austrittsöffnung (22) eine Düsenaustrittsöffnung ist. - Vorrichtung nach wenigstens einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
die Austrittsöffnung (22) in einem trichterförmigen Element angeordnet ist. - Vorrichtung nach wenigstens einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
das Kraftstoff-Gas-Gemisch ein Kraftstoff-Luft-Gemisch oder ein Kraftstoff-Abgas-Gemisch oder ein Kraftstoff-Luft/Abgas-Gemisch ist. - Vorrichtung nach wenigstens einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
die Gaszuführung am ersten und/oder zweiten Gaszuführmittel (14,16) mittels Differenzdruckes, eines externen Kompressors oder einer Sekundärluftpumpe erfolgt. - Vorrichtung nach wenigstens einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
die Vorrichtung Mittel aufweist, die die Vorrichtung und/oder eine Düse dieser Vorrichtung wenigstens teilweise elektrisch, mit Abgasen oder mittels Zufuhr von Kühlmittel der Brennkraftmaschine beheizen. - Verfahren zum Einspritzen von Kraftstoff (12) in einen Brennraum einer Brennkraftmaschine, insbesondere eines Kraftfahrzeuges, mit folgenden Schritten,a) Mischen eines ersten Gases und Kraftstoff zu einem Kraftstoff-Gas-Gemisch,b) Zuleiten eines zweiten Gases derart, dass das Kraftstoff-Gas-Gemsich vom zweiten Gas umhüllt wird, wobei wenigstens eines der zugeführten Gase ein Abgas der Brennkraftmaschine ist.
- Verfahren nach Anspruch 11,
dadurch gekennzeichnet, daß
das erste oder das zweite Gas Luft und/oder Abgas ist. - Verfahren nach Anspruch 11 oder 12,
dadurch gekennzeichnet, daß
Schritt (a) in einer Mischkammer erfolgt. - Verfahren nach Anspruch 13,
dadurch gekennzeichnet, daß
Schritt (b) an einer Austrittsöffnung der Mischkammer erfolgt. - Verfahren nach wenigstens einem der Ansprüche 11 bis 14,
dadurch gekennzeichnet, daß
in Schritt (b) das zweite Gas das Kraftstoff-Gas-Gemisch ringförmig umschließt. - Verfahren nach wenigstens einem der Ansprüche 11 bis 15,
dadurch gekennzeichnet, daß
das Kraftstoff-Gas-Gemisch ein Kraftstoff-Luft-Gemisch oder ein Kraftstoff-Abgas-Gemisch oder ein Kraftstoff-Luft/Abgas-Gemisch ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19648375 | 1996-11-22 | ||
DE19648375 | 1996-11-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0844387A2 EP0844387A2 (de) | 1998-05-27 |
EP0844387A3 EP0844387A3 (de) | 2001-07-18 |
EP0844387B1 true EP0844387B1 (de) | 2004-01-07 |
Family
ID=7812456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97118597A Expired - Lifetime EP0844387B1 (de) | 1996-11-22 | 1997-10-25 | Vorrichtung und Verfahren zur luftunterstützen Kraftstoffeinspritzung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0844387B1 (de) |
DE (1) | DE59711182D1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007039406B4 (de) * | 2007-08-21 | 2016-10-20 | Continental Automotive Gmbh | Vorrichtung, Verfahren, Computerprogramm und Steuerung zum Betreiben einer Brennkraftmaschine |
FR2928703B1 (fr) * | 2008-03-11 | 2011-07-29 | Renault Sas | Moteur a combustion interne et procede d'injection |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2842010A1 (de) * | 1978-09-27 | 1980-04-10 | Bosch Gmbh Robert | Kraftstoffeinspritzanlage |
DE3227181A1 (de) * | 1982-07-21 | 1984-01-26 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Kraftstoffeinspritzvorrichtung fuer eine gemischverdichtende, fremdgezuendete brennkraftmaschine |
GB2263309A (en) * | 1992-01-16 | 1993-07-21 | Ford Motor Co | Mixing injected fuel with air in an ic engine intake. |
-
1997
- 1997-10-25 EP EP97118597A patent/EP0844387B1/de not_active Expired - Lifetime
- 1997-10-25 DE DE59711182T patent/DE59711182D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59711182D1 (de) | 2004-02-12 |
EP0844387A3 (de) | 2001-07-18 |
EP0844387A2 (de) | 1998-05-27 |
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