EP0728941B1 - Einrichtung zum Einbringen von Kraftstoff in den Brennraum einer Brennkraftmaschine - Google Patents
Einrichtung zum Einbringen von Kraftstoff in den Brennraum einer Brennkraftmaschine Download PDFInfo
- Publication number
- EP0728941B1 EP0728941B1 EP96890010A EP96890010A EP0728941B1 EP 0728941 B1 EP0728941 B1 EP 0728941B1 EP 96890010 A EP96890010 A EP 96890010A EP 96890010 A EP96890010 A EP 96890010A EP 0728941 B1 EP0728941 B1 EP 0728941B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- fuel
- mixing chamber
- area
- 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
- 239000000446 fuel Substances 0.000 title claims description 68
- 238000002485 combustion reaction Methods 0.000 title claims description 26
- 238000002156 mixing Methods 0.000 claims description 51
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 20
- 238000000889 atomisation Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 9
- 239000007921 spray Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000013517 stratification Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D7/00—Other fuel-injection control
- F02D7/02—Controlling fuel injection where fuel is injected by compressed air
-
- 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
- F02M47/04—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure using fluid, other than fuel, for injection-valve actuation
- F02M47/046—Fluid pressure acting on injection-valve in the period of injection to open it
-
- 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
- F02M67/04—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 the air being extracted from working cylinders of the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
- F02D41/3023—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the stratified charge spark-ignited mode
Definitions
- the invention relates to a device for introducing Fuel in the combustion chamber of an internal combustion engine with a Blow-in valve for removing compressed gas from the cylinder and for blowing in the gas and the delivered fuel in the cylinder, with a valve-side mixing chamber for storing the gas into which mixing chamber fuel is going at least one fuel flow path opening into the mixing chamber can be introduced, the injection valve being a lift valve to control the gas exchange between the combustion chamber and the valve-side space, and wherein the valve seat the mixing valve delimits the mixing chamber from the combustion chamber, the mouth of the fuel flow path into the mixing chamber arranged in the region of the valve seat of the globe valve is.
- EP 399 991 A1 describes a device of the type mentioned known with the compressed gas during a working cycle removed from the cylinder, temporarily stored and in the following Duty cycle along with the fuel in the cylinder is blown in, taking a small Amount of hot gas from the cylinder timed over a valve is opened in the combustion chamber of the cylinder.
- the extracted hot gas is stored for a short time fuel is injected, creating a substantially homogeneous gas-fuel mixture is created.
- the stored fuel-gas mixture in the following Working cycle through the valve opening in the cylinder blown into the combustion chamber.
- From DE 40 30 890 A1 is a similar fuel injection device for two-stroke internal combustion engines with a mixing chamber known, which with the combustion chamber via a globe valve connected is.
- the mixing chamber is operated via the lift valve charged with compressed cylinder gas and after injection of fuel into the mixing chamber The mixture is blown into the combustion chamber through the lift valve.
- the fuel is supplied to the middle area of the injection valve, the fuel metering via a as a seat valve trained fuel valve on the valve seat of the globe valve part of the mixing chamber facing away.
- the valve seat the fuel valve is on or in the mixing chamber arranged coaxially to the lift valve and by the fuel pressure controllable.
- the fuel valve is powered by a spring preloaded on the control piston or on a transverse housing wall supports, which has the disadvantage that the different Component and spring tolerances Inaccuracies in fuel metering cause. Because the valve seat is in or on the Mixing chamber is executed, the fuel valve is required for a sealing function a guide in the fixed part of the injection valve, what as a result of the necessary movement between Dosing piston of the fuel valve and the guide a disadvantageous Brings with it friction. By being relatively far away from the valve seat of the globe valve into the mixing chamber Fuel injection is the quality of the mixture preparation quite different in the mixing chamber.
- DE 830 589 C is an air injection injector known for the fuel with compressed air, which in the Nozzle is inserted before it is injected into the combustion chamber is mixed and blown in by the compressed air.
- This valve but is not intended and suitable for compressed Take gas out of the cylinder.
- the fuel flow path is partly through a longitudinal bore in the valve stem of the globe valve formed, the fuel being introduced into the valve stem in a region of the globe valve facing away from the valve seat he follows.
- the fuel orifices on the valve stem are centrally located with respect to the mixing chamber, resulting in mixture preparation is useful when blowing in compressed air, especially when homogeneous mixing is desired becomes. A stratification of the mixture in the mixing chamber can hardly be achieved in this way.
- the object of the invention is to provide constant, reproducible operating conditions to enable and the mixture preparation in the mixing chamber with a view to reproducible Layering of the mixture in the combustion chamber, especially in part-load operation to improve.
- this is achieved in that the fuel flow path at least in part through a longitudinal bore is formed in the valve stem of the lift valve, the fuel introduction in the valve stem in one of the valve seats area of the lift valve facing away and that the fuel flow path through a in the area of the mouth in the Mixing chamber arranged check valve against the fuel delivery direction is lockable.
- Near the injection valve fat mixture portions are stored upstream and these when blowing in the mixture, first blow into the combustion chamber.
- the fuel is, for example, outside via an annular groove the mixing chamber and radial bores of the longitudinal bore of the valve stem.
- a very good atomization of the fuel can be achieved in that the mouth through one or more radial spray bores in the injection valve stem is formed.
- the wall of the Mixing chamber in the area of impact of an injected through the mouth A bead or nose-like atomizing edge for atomizing the fuel jet.
- the fuel jets emerging from the valve stem meet the atomizing edge and are by this finely fanned out.
- Vapor bubbles can escape from the valve stem Fuel supply can be prevented.
- the check valve as one on the valve stem attached ring-shaped lip valve whose lips rest against the valve stem in the closed position and close the mouth, being in the open position those elastically deflected by the fuel pressure Lips are directed towards the valve seat.
- the one on the blow valve seated ring is activated by the The fuel pressure is deformed elastically and thereby gives the injection openings freely, taking through the lips of the lip valve the fuel is deflected in the direction of the valve seat and is atomized.
- the mouth of the fuel flow path in a spatially separate from the other mixing chamber divided injection area. This will make the mixture layering supported in a particularly advantageous manner.
- Evaporation and preparation of the mixture in the mixing chamber can be further improved in that the injection valve has a heating device in the area of the mixing chamber.
- the heating device can, for example, be an electric one Resistance heating or be designed as a heat exchanger.
- the mixing chamber wall is a pre-reaction of the fuel-air mixture catalytically favorable Surface.
- the catalytically active coating the inside of the mixing chamber favors pre-reactions of the Fuel and thereby accelerates the ignition of the mixture cloud after blowing into the combustion chamber.
- an injection valve 1 is not schematically one shown internal combustion engine. With 2 it is Cylinder head, with the reference numeral 3 a cylinder of the internal combustion engine indicated.
- a lift valve 5 is slidably mounted in the valve housing 4 of the injection valve 1.
- the lift valve 5 is, for example, a hydraulic actuator 6 operated.
- the actuating device can likewise 6 can also be pneumatic or electric.
- a Hydraulic actuator 6 shown is a Actuating piston 7 of the lift valve 5 with hydraulic pressure in the pressure chamber 8 against the force of a spring 9 with Pressurized, causing the lift valve 5 in the open position is deflected. When the pressure is released, the globe valve 5 brought into the closed position by the spring 9.
- the pressure chamber 8 carries a hydraulic line 10 which a switching valve 11 with a pump 12 or the like. Connectable is. In a second position of the switching valve 11, the Pressure chamber 8 are relieved via the relief line 13. 13a denotes a container for the hydraulic fluid, which can also be fuel.
- the switching valve 11 will actuated via an electronic control unit ECU.
- a mixing chamber 14 is arranged inside the valve housing 4, which in the open position of the lift valve 5 with the combustion chamber 21 of the internal combustion engine in fluid communication is.
- a fuel flow path opens into the mixing chamber 14 15, via which fuel is injected into the mixing chamber 14 can be.
- the fuel supply system is through the fuel tank 16, the fuel delivery device 17, a fuel valve 18 and the fuel flow path 15 within of the injection valve 1 indicated.
- the fuel flow path 15 consists of a feed channel 19 in the valve housing 4, cross bores 20 in the valve stem 23 in the area of Feed channel 19, a longitudinal bore 22 in the valve stem 23 of the Lift valves 5 and spray bores 24 in the valve stem 23 in the area of the valve seat 25.
- a check valve 27 is provided in the mixing chamber 14.
- the check valve is 27 directly in the area of the spray bores 24 or the longitudinal bore 22 is arranged.
- FIG. 2 shows a detail of the injection valve 1 from FIG. 2 with the atomizing edge 28.
- FIG. 1 In another embodiment variant shown in FIG The invention is instead of or in addition to the check valve 27 an annular lip valve surrounding the valve stem 23 30 provided in the area of the mouths 26. That stuck on Valve stem 23 seated lip valve 30 points in the direction Combustion chamber directed elastically deformable lips 31, which in the closed position, the mouths 26 of the spray bores 24 cover and close.
- the lips 31 of the lip valve 30 can be stretched from the valve stem 23 are raised, as a result of which the fuel jet 29 fan-like in the direction of the valve stem 23 and the valve seat 25 is divided and atomized, as in the detailed view 5 can be seen.
- Fig. 6 shows an injection valve 1, the mixing chamber 14 over a heater 32, which is electrical or as a heat exchanger can be formed, is heated.
- the external heater 32 is with each of the others in FIGS. 1, 2 and 4 shown versions can be combined.
- the wall 14a of the mixing chamber 14 can be coated with a material be or consist of a material which is catalytic Preliminary reactions of the fuel favored and later ignition of the mixture cloud in the combustion chamber 21 accelerated.
- a spatially a partition 33 separate from the rest of the mixing chamber 14 injection area 14b can be provided, in which the mouth 26 lies. This enables the mixture layering to be improved.
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)
Description
- Fig. 1 und 2
- Ausführungsvarianten des erfindungsgemäßen Einblaseventiles im Längsschnitt,
- Fig. 3
- eine Detailansicht des Ventiles aus Fig. 2,
- Fig. 4
- eine dritte Ausführungsvariante,
- Fig. 5
- eine Detailansicht des Ventiles aus Fig. 4,
- Fig. 6 und 7
- weitere Ausführungsvarianten der Erfindung.
Claims (7)
- Einrichtung zum Einbringen von Kraftstoff in den Brennraum einer Brennkraftmaschine mit einem Einblaseventil (1) zum Entnehmen von verdichtetem Gas aus dem Zylinder und zum Einblasen des Gases und des geförderten Kraftstoffes in den Zylinder, mit einer ventilseitigen Mischkammer (14) zum Speichern des Gases, in welche Mischkammer Kraftstoff über mindestens einen in die Mischkammer mündenden Kraftstoffströmungsweg (15) einbringbar ist, wobei das Einblaseventil ein Hubventil (5) zur Steuerung des Gasaustausches zwischen dem Brennraum und dem ventilseitigen Raum aufweist, und wobei der Ventilsitz (25) des Hubventiles die Mischkammer gegen den Brennraum abgrenzt, wobei die Mündung des Kraftstoffströmungsweges in die Mischkammer im Bereich des Ventilsitzes des Hubventiles angeordnet ist, dadurch gekennzeichnet , daß der Kraftstoffströmungsweg (15) zumindest zum Teil durch eine Längsbohrung (22) im Ventilschaft (23) des Hubventiles (5) gebildet ist, wobei die Kraftstoffeinleitung in den Ventilschaft (23) in einem dem Ventilsitz (25) abgewandten Bereich des Hubventiles (5) erfolgt und daß der Kraftstoffströmungsweg (15) durch ein im Bereich der Mündung (26) in die Mischkammer (14, 14b) angeordnetes Rückschlagventil (27; 30) entgegen der Kraftstofförderrichtung verschließbar ist.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mündung (26) durch eine oder mehrere radiale Spritzbohrungen (24) im Ventilschaft (23) gebildet ist.
- Einrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Wand (14a) der Mischkammer (14, 14b) im Auftreffbereich eines durch die Mündung (26) eingespritzten Kraftstoffstrahles (29) eine wulst- oder nasenartige Zerstäubungskante (28) zur Zerstäubung des Kraftstoffstrahles (29 aufweist.
- Einrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Rückschlagventil als ein am Ventilschaft (23) befestigtes, ringförmiges Lippenventil (30) ausgeführt ist, dessen Lippen (31) in der Schließstellung am Ventilschaft (23) anliegen und die Mündung (26) verschließen, wobei in der Öffnungsstellung die durch den Kraftstoffdruck elastisch ausgelenkten Lippen (31) etwa zum Ventilsitz (25) gerichtet sind.
- Einrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Mündung (26) des Kraftstoffströmungsweges (15) in einem räumlich von der übrigen Mischkammer (14) geteilten Einspritzbereich (14b) liegt.
- Einrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Einblaseventil (1) im Bereich der Mischkammer (14, 14b) eine Heizeinrichtung (32) aufweist.
- Einrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Mischkammerwand (14a) eine die Vorreaktion des Kraftstoff-Luft-Gemisches katalytisch begünstigende Oberfläche aufweist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0032795A AT408138B (de) | 1995-02-23 | 1995-02-23 | Einrichtung zum einbringen von kraftstoff in den brennraum einer brennkraftmaschine |
| AT327/95 | 1995-02-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0728941A1 EP0728941A1 (de) | 1996-08-28 |
| EP0728941B1 true EP0728941B1 (de) | 1998-05-27 |
Family
ID=3487634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96890010A Expired - Lifetime EP0728941B1 (de) | 1995-02-23 | 1996-01-17 | Einrichtung zum Einbringen von Kraftstoff in den Brennraum einer Brennkraftmaschine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5590635A (de) |
| EP (1) | EP0728941B1 (de) |
| AT (1) | AT408138B (de) |
| DE (1) | DE59600214D1 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030012985A1 (en) | 1998-08-03 | 2003-01-16 | Mcalister Roy E. | Pressure energy conversion systems |
| AT408137B (de) * | 1995-02-27 | 2001-09-25 | Avl Verbrennungskraft Messtech | Einrichtung zum einbringen von kraftstoff in den brennraum einer brennkraftmaschine |
| US6764028B2 (en) | 2001-04-04 | 2004-07-20 | Synerject, Llc | Fuel injector nozzles |
| AT7202U1 (de) * | 2002-12-19 | 2004-11-25 | Avl List Gmbh | Verfahren zum betreiben einer mit gas betriebenen brennkraftmaschine |
| DE102004016811A1 (de) * | 2004-04-06 | 2005-10-27 | Klaus Dipl.-Ing. Sander | Verfahren für eine homogene Gemischbildung zur Kraftstoffverbrennung in Verbrennungskraftmaschinen |
| WO2014144581A1 (en) | 2013-03-15 | 2014-09-18 | Mcalister Technologies, Llc | Internal combustion engine and associated systems and methods |
| US9255560B2 (en) * | 2013-03-15 | 2016-02-09 | Mcalister Technologies, Llc | Regenerative intensifier and associated systems and methods |
| DK178655B1 (en) * | 2015-03-20 | 2016-10-17 | Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland | Fuel valve for injecting fuel into a combustion chamber of a large self-igniting turbocharged two-stroke internal combustion engine |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2230920A (en) * | 1936-08-31 | 1941-02-04 | Wirtsen Ernst | Injection valve for internal combustion engines |
| US2203669A (en) * | 1938-05-16 | 1940-06-11 | Butler Frank David | Internal combustion engine chargeforming device |
| DE830589C (de) * | 1942-10-18 | 1952-02-07 | Daimler Benz Ag | Lufteinblase-Einspritzduese |
| US2697007A (en) * | 1951-06-13 | 1954-12-14 | Wille Rudolf | Fuel injection device for internalcombustion engines |
| GB1599400A (en) * | 1977-06-09 | 1981-09-30 | Lucas Industries Ltd | Fuel injection systems for internal combustion engines |
| JPS6193265A (ja) * | 1984-10-13 | 1986-05-12 | Diesel Kiki Co Ltd | 多段噴射ノズル |
| DE3872217D1 (de) * | 1987-08-12 | 1992-07-23 | Avl Verbrennungskraft Messtech | Einrichtung zur einbringung des kraftstoffes in den brennraum einer brennkraftmaschine. |
| AT407428B (de) * | 1989-04-12 | 2001-03-26 | Avl Verbrennungskraft Messtech | Hydraulisch betätigbares ventil mit steuerbarem hub |
| AT410124B (de) * | 1989-05-24 | 2003-02-25 | Avl Verbrennungskraft Messtech | Vorrichtung zur steuerung des hubes eines hydraulisch betätigbaren ventiles |
| US4932374A (en) * | 1989-06-21 | 1990-06-12 | General Motors Corporation | Fuel injector nozzle for internal combustion engine |
| DE4030890A1 (de) * | 1990-09-29 | 1992-04-02 | Bosch Gmbh Robert | Kraftstoffeinblaseinrichtung fuer zweitakt-brennkraftmaschinen |
| JP2851170B2 (ja) * | 1991-03-05 | 1999-01-27 | 株式会社日本自動車部品総合研究所 | 内燃機関の燃料供給装置 |
-
1995
- 1995-02-23 AT AT0032795A patent/AT408138B/de not_active IP Right Cessation
-
1996
- 1996-01-17 EP EP96890010A patent/EP0728941B1/de not_active Expired - Lifetime
- 1996-01-17 DE DE59600214T patent/DE59600214D1/de not_active Expired - Fee Related
- 1996-02-23 US US08/605,893 patent/US5590635A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE59600214D1 (de) | 1998-07-02 |
| US5590635A (en) | 1997-01-07 |
| AT408138B (de) | 2001-09-25 |
| ATA32795A (de) | 2001-01-15 |
| EP0728941A1 (de) | 1996-08-28 |
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