DE102009053722A1 - Fuel injection method for diesel engines, involves arranging injectors at cylinder circumference in tangential manner - Google Patents
Fuel injection method for diesel engines, involves arranging injectors at cylinder circumference in tangential manner Download PDFInfo
- Publication number
- DE102009053722A1 DE102009053722A1 DE102009053722A DE102009053722A DE102009053722A1 DE 102009053722 A1 DE102009053722 A1 DE 102009053722A1 DE 102009053722 A DE102009053722 A DE 102009053722A DE 102009053722 A DE102009053722 A DE 102009053722A DE 102009053722 A1 DE102009053722 A1 DE 102009053722A1
- Authority
- DE
- Germany
- Prior art keywords
- diesel engines
- fuel injection
- injection method
- combustion chamber
- fuel
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/01—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B45/00—Means for securing grinding wheels on rotary arbors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0645—Details related to the fuel injector or the fuel spray
- F02B23/0663—Details related to the fuel injector or the fuel spray having multiple injectors per combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/28—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
- F02B75/282—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders the pistons having equal strokes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0645—Details related to the fuel injector or the fuel spray
- F02B23/066—Details related to the fuel injector or the fuel spray the injector being located substantially off-set from the cylinder centre axis
-
- 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
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Die Erfindung ist im Prinzip zur Anwendung bei allen Dieselmotoren, insbesondere aber zur Anwendung bei Gegenkolbenmotoren geeignet. Diese sind dadurch gekennzeichnet, dass sie keinen Zylinderkopf aufweisen. Vielmehr wird das Arbeitsgas zwischen zwei sich gegenläufig auf den inneren Totpunkt hinzu bewegenden Kolben komprimiert. Dadurch muss nicht nur der Gaswechsel durch am Zylinderumfang angeordnete Kanäle erfolgen, sondern auch der Kraftstoff muss vom äußeren Zylinderumfang her in den Brennraum eingespritzt werden. Dies erfordert im Vergleich zum konventionellen Mischvorgang eine grundsätzlich unterschiedliche Anordnung der Injektoren zur Einspritzung des Kraftstoffes. Während im Allgemeinen die Einspritzdüse oberhalb der Brennkammer in – oder nahe – der Zylinderachsenmitte angebracht ist und den Kraftstoff durch mehrere Düsenlöcher von innen nach außen verteilt, muss bei Gegenkolbendieselmotoren der Kraftstoff von außen nach innen in die Brennkammer eingebracht werden.The invention is in principle suitable for use in all diesel engines, but in particular for use in opposed piston engines. These are characterized in that they have no cylinder head. Instead, the working gas is compressed between two pistons which move in opposite directions to the inner dead center. As a result, not only does the gas exchange have to take place through channels arranged on the circumference of the cylinder, but also the fuel has to be injected into the combustion chamber from the outer cylinder circumference. This requires in comparison to the conventional mixing process a fundamentally different arrangement of the injectors for injection of the fuel. While generally the injector is mounted above or near the center of the cylinder axis above the combustion chamber and distributes the fuel through several nozzle holes from inside to outside, in counterbalanced diesel engines the fuel must be introduced into the combustion chamber from outside to inside.
Um den bei modernen Motoren im Interesse niedriger Abgasemissionen angestrebten homogenen Mischvorgang zu erreichen, sind die Mittel bei Motoren mit mittigen oder mittennah angeordneten Einspritzorganen oberhalb der Brennkammer stark eingeschränkt. Erst gegen Ende des Einspritzvorganges liegt ein nahezu stöchiometrisches Gemisch vor. Zu Beginn der Einspritzung ist das Gemisch noch zu mager. Durch eine Vormischung vor Beginn der Zündung, beispielsweise durch eine nicht zündende Voreinspritzung, kann dieser Mangel nur teilweise behoben werden. Auch eine sehr kurze Einspritzzeit, die schon kurz nach Einsetzen der Verbrennung den Mischvorgang beendet hat, lässt sich nur bedingt realisieren, da sie entweder (aus anderen Gründen nachteilige) große Einspritzlöcher erfordert oder einen sehr hohen Einspritzdruck. Bessere Chancen bietet ein Brennverfahren, bei dem der Kraftstoff von außen dem Brennraum zugeführt wird und somit in günstiger Weise auf das Arbeitsgas verteilt werden kann.In order to achieve the desired in modern engines in the interest of low exhaust emissions homogeneous mixing process, the means for engines with central or near-center injection means above the combustion chamber are severely limited. Only towards the end of the injection process is there a nearly stoichiometric mixture. At the beginning of the injection, the mixture is still too lean. By premixing before the start of the ignition, for example by a non-igniting pilot injection, this deficiency can only be partially resolved. Even a very short injection time, which has finished the mixing process shortly after the onset of combustion, can only be realized to a limited extent because it either requires (for other reasons disadvantageous) large injection holes or a very high injection pressure. There is a better chance of a combustion process in which the fuel is supplied from the outside of the combustion chamber and thus can be distributed in a favorable manner to the working gas.
Der Erfindung liegt daher die Aufgabe zugrunde, sowohl eine kürzere Einspritzzeit zu realisieren, als auch ein möglichst homogenes Gas-Kraftstoffgemisch vor Einsetzen der Verbrennung herzustellen.The invention is therefore based on the object to realize both a shorter injection time, as well as produce a homogeneous gas-fuel mixture before the onset of combustion.
Deshalb werden erfindungsgemäß zwei oder mehrere Einspritzdüsen so im Bereich der oberen Kolbentotpunkte am Zylinderumfang angeordnet, dass ihre Einspritzstrahlen in tangentialer Richtung auf den Schwerkreis des in einem rotations-symmetrisch hergestellten Brennraum befindlichen Volumens ausgerichtet sind. Die Anordnung mehrerer Düsen ermöglicht sowohl eine zeitgleiche Einspritzung durch alle Düsen, wodurch eine kürzere Einspritzzeit erreicht wird. als auch erfindungsgemäß im Bedarfsfalle eine Einspritzung in unterschiedlicher Zeitabfolge der einzelnen Düsen. Dabei wird der Kraftstoffstrahl durch einen als Schusskanal ausgeführten Schnaupe auf der Kolbenoberseite vom Zylinderrand her zur Brennkammer geführt.Therefore, according to the invention, two or more injection nozzles are arranged in the region of the upper piston dead centers on the cylinder circumference such that their injection jets are aligned in the tangential direction to the gravity circuit of the volume located in a rotationally symmetrically produced combustion chamber. The arrangement of multiple nozzles allows both a simultaneous injection through all nozzles, whereby a shorter injection time is achieved. as well as according to the invention in case of need an injection in different time sequence of the individual nozzles. In this case, the fuel jet is guided by a spout designed as a firing channel on the piston top from the cylinder edge forth to the combustion chamber.
Bei herkömmlichen, mittig im Zylinderkopf angeordnete Düsen ist es nachteilig, dass die Düsenspitze sehr nahe an der heißesten Stelle des Brennraumes liegt, während sie sich bei der erfindungsgemäßen Anordnung an den kältesten Stellen außerhalb des Brennraumes befinden. Die konventionelle Anordnung kann die heiße Temperatur jedoch nicht zur Verdampfung des Kraftstoffes nutzen, da die Strahlwurzel nahe der Düsenspitze noch zu kompakt ist und sich erst in der Nähe der kalten Brennraumwände in hoher Auflösung befindet. Demgegenüber hat das erfindungsgemäße Verfahren den Vorteil, dass sich die Strahlauflösung umso besser wird, je weiter sie zur heißen Brennraummitte gelangt, was ebenfalls zur beschleunigten homogenen Gemischbildung beiträgt. Während beim herkömmlichen Brennverfahren die Anbringung einer zweiten Düse in der Brennraummitte aus geometrischen Gründen nicht möglich ist, können beim vorliegenden Verfahren nahezu beliebig viele Düsen am Zylinderumfang angeordnet sein. Das ermöglicht auch, mit einem sehr geringen, oder gar keinem Luftdrall eine gute Mischung zu erzielen. Dies wiederum bedeutet geringere Wärmeverluste an die Brennraumwände und damit bessere Effizienz.In the case of conventional nozzles arranged centrally in the cylinder head, it is disadvantageous that the nozzle tip lies very close to the hottest point of the combustion chamber, while in the arrangement according to the invention it is located at the coldest points outside the combustion chamber. However, the conventional arrangement can not use the hot temperature to vaporize the fuel because the jet root near the nozzle tip is still too compact and is only in high resolution near the cold combustion chamber walls. In contrast, the method of the invention has the advantage that the beam resolution gets better, the further it gets to the hot combustion chamber center, which also contributes to the accelerated homogeneous mixture formation. While in the conventional combustion method, the attachment of a second nozzle in the combustion chamber center for geometric reasons is not possible, in the present method, almost any number of nozzles can be arranged on the cylinder circumference. This also makes it possible to achieve a good mix with very little or no air swirl. This in turn means lower heat losses to the combustion chamber walls and thus better efficiency.
Bildbeschreibung:Picture description:
Claims (10)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202009017699U DE202009017699U1 (en) | 2009-11-18 | 2009-11-18 | Tangentially aligned on the cylinder circumference injection nozzles for internal combustion engines with gas exchange control |
DE102009053722A DE102009053722A1 (en) | 2009-11-18 | 2009-11-18 | Fuel injection method for diesel engines, involves arranging injectors at cylinder circumference in tangential manner |
US13/510,817 US20120285418A1 (en) | 2009-11-18 | 2010-11-16 | Fuel injection method for diesel engines with injection nozzles arranged in a tangential manner on the periphery of the cylinder |
PCT/EP2010/067580 WO2011061191A1 (en) | 2009-11-18 | 2010-11-16 | Fuel injection method for diesel engines with injection nozzles arranged in a tangential manner on the periphery of the cylinder |
JP2012539304A JP2013511641A (en) | 2009-11-18 | 2010-11-16 | Fuel injection method for a diesel engine having injection nozzles arranged tangentially around the cylinder |
CN2010800615665A CN102713152A (en) | 2009-11-18 | 2010-11-16 | Fuel injection method for diesel engines with injection nozzles arranged in a tangential manner on the periphery of the cylinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009053722A DE102009053722A1 (en) | 2009-11-18 | 2009-11-18 | Fuel injection method for diesel engines, involves arranging injectors at cylinder circumference in tangential manner |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102009053722A1 true DE102009053722A1 (en) | 2011-05-19 |
Family
ID=50884621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102009053722A Withdrawn DE102009053722A1 (en) | 2009-11-18 | 2009-11-18 | Fuel injection method for diesel engines, involves arranging injectors at cylinder circumference in tangential manner |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102009053722A1 (en) |
-
2009
- 2009-11-18 DE DE102009053722A patent/DE102009053722A1/en not_active Withdrawn
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2011061191A1 (en) | Fuel injection method for diesel engines with injection nozzles arranged in a tangential manner on the periphery of the cylinder | |
DE1526294C3 (en) | Spark ignition, mixture-compressing internal combustion engine | |
AT522438A4 (en) | COMBUSTION MACHINE WITH A CYLINDER HEAD | |
EP2882947B1 (en) | Internal combustion engine with a first and a second injector | |
DE102013213749B4 (en) | Method and device for controlling a four-stroke internal combustion engine | |
EP1563172B1 (en) | Two-stroke internal combustion engine with free opposed pistons | |
DE102016109029A1 (en) | Free piston device and method for operating a free piston device | |
DE102020000353B4 (en) | Method for operating an internal combustion engine of a motor vehicle, in particular a motor vehicle | |
EP3404235A1 (en) | Large diesel motor and method for operating same | |
DE102009053722A1 (en) | Fuel injection method for diesel engines, involves arranging injectors at cylinder circumference in tangential manner | |
DE19854776A1 (en) | Method for igniting a multi-cylinder reciprocating gas engine by blowing in an ignition gas | |
DE202020002930U1 (en) | Fuel injection in the internal combustion engine | |
DE102005037551A1 (en) | Internal combustion engine, has injector injecting fuel into combustion chamber and two ignition mechanisms attached to chamber, where one of mechanisms is arranged in radial outer edge region of chamber | |
DE2410948A1 (en) | Multi-stage piston I.C. engine - has piston compressor stages operated by engine common crankshaft | |
EP1290320B1 (en) | Fuel injection system and method for the injection of fuel | |
DE10035239A1 (en) | Internal combustion engine | |
EP1007833B1 (en) | Method for igniting a multi-cylinder reciprocating gas engine by injecting an ignition gas | |
DE3927853A1 (en) | IC engine using continuous supply of heat - has suction and compression cylinder and expansion and exhaust cylinder | |
DE19857555A1 (en) | Internal combustion engine with direct fuel injection and externally supplied ignition has single cylinder high pressure fuel pump installed on side of cylinder head and operated by longitudinally movable cam follower | |
DE102022125072B3 (en) | Self-igniting internal combustion engine and method for operating the same | |
DE102019215852B4 (en) | Ignition device for an internal combustion engine | |
DE10351058A1 (en) | Cyclic process for operating an internal combustion engine, especially a reciprocating or rotary piston internal combustion engine, comprises introducing into each combustion chamber the combustion educts and closing the outlet valves | |
DE652650C (en) | Air-compressing injection internal combustion engine with self-ignition and an almost spherical combustion chamber | |
DE888331C (en) | Piston combustion engine working with internal mixture formation with fresh gas heating by the exhaust gas | |
DE102011052502B4 (en) | internal combustion engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20120601 |