DE3025943A1 - Diesel engine with rotationally symmetrical combustion chamber - has chamber in piston with frusto=conical side wall and inlet port of restricted dia. - Google Patents
Diesel engine with rotationally symmetrical combustion chamber - has chamber in piston with frusto=conical side wall and inlet port of restricted dia.Info
- Publication number
- DE3025943A1 DE3025943A1 DE19803025943 DE3025943A DE3025943A1 DE 3025943 A1 DE3025943 A1 DE 3025943A1 DE 19803025943 DE19803025943 DE 19803025943 DE 3025943 A DE3025943 A DE 3025943A DE 3025943 A1 DE3025943 A1 DE 3025943A1
- Authority
- DE
- Germany
- Prior art keywords
- piston
- internal combustion
- combustion engine
- engine according
- annular bead
- 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.)
- Granted
Links
Classifications
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- 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
- 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
- F02B23/0636—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 the combustion space having a substantially flat and horizontal bottom
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- 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
- F02B23/0669—Details related to the fuel injector or the fuel spray having multiple fuel spray jets per injector nozzle
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- 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
- F02B23/0678—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets
- F02B23/0693—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets the combustion space consisting of step-wise widened multiple zones of different depth
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- 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
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/14—Direct injection into combustion chamber
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- 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
- F02B23/0618—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 having in-cylinder means to influence the charge motion
- F02B23/0624—Swirl flow
-
- 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
- F02B23/0648—Means or methods to improve the spray dispersion, evaporation or ignition
- F02B23/0651—Means or methods to improve the spray dispersion, evaporation or ignition the fuel spray impinging on reflecting surfaces or being specially guided throughout the combustion space
-
- 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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- 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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
Daimler-Benz Aktiengesellschaft Daim 12 96o/h Daimler-Benz Aktiengesellschaft Daim 12,900 / h
Stuttgart-Üntertürkheim 4. 7. 1980Stuttgart-Üntertürkheim July 4, 1980
Selbstzündende Breimkraftmaschine mit einer rotationssymmetrischen KolbenmuldeSelf-igniting Breimkraftmaschine with a rotationally symmetrical piston bowl
Die Erfindung betrifft eine selbstzündende Brennkraftmaschine mit einer rotationssymmetrischen Kolbenmulde nach dem Oberbegriff des Anspruchs 1. Bei derartigen Brennkraftmaschinen wird meist eine Drallbewegung der eingeströmten und komprimierten Luft durch bekannte Maßnahmen erzeugt; die Kraftstoffeinspritzung erfolgt aufgrund geeigneter Wahl der Düsenlage und Strahlrichtung in Richtung der Luftbewegung.The invention relates to a self-igniting internal combustion engine with a rotationally symmetrical piston bowl the preamble of claim 1. In such internal combustion engines is usually a swirling movement of the inflowing and compressed air by known measures generated; the fuel injection takes place due to suitable Choice of nozzle position and jet direction in the direction of air movement.
Eine derartige Brennkraftmaschine ist bereits durch die • DE-AS 1 Ο32 597 bekannt geworden, wobei die mit breitgefächertem Strahl arbeitende Einspritzdüse derart angeordnet ist, daß der in Richtung der Einspritzdüsenachse verlaufende Strahlkegel in freier Luft den Rand der Kolbenmulde trifft, so daß nur ein Teil des KraftstoffStrahles in die Kolbenmulde gelangt.Such an internal combustion engine is already through the • DE-AS 1 Ο32 597 become known, with the wide range Jet working injection nozzle is arranged such that the extending in the direction of the injection nozzle axis In the open air, the jet cone hits the edge of the piston bowl, so that only part of the fuel jet enters the piston bowl reaches.
Es ist eine weitere Ausführung mit in Längsrichtung trapezförmigem Querschnitt bekannt, bei der die Einspritzdüse so weit herangeführt ist, daß sie innerhalb des Halses der Brennraummulde liegt, wobei die Einspritzung auch fächerförmig mittels einer Mehrlocheinspritzdüse erfolgen kann.It is another version with a trapezoidal shape in the longitudinal direction Cross-section known in which the injection nozzle is brought so far that it is within the neck the combustion bowl is located, the injection also taking place in a fan shape by means of a multi-hole injection nozzle can.
130065/0261130065/0261
Palm 12 9-60/4Palm 12 9-60 / 4
Darüber hinaus sind Kolbenmulden von kugelartiger, zylindrischer oder hyperboloidförmiger Gestalt bekannt.In addition, piston bowls are spherical, cylindrical or hyperboloidal shape known.
Alle diese Ausgestaltungen von Kolbenmulden haben den Nachteil, daß sie hinsichtlich der Abgas- und Geräuschemission nicht befriedigen. Die Ursache hierfür liegt darin, daß einerseits zwar durch Wandbenetzung ein mehr oder weniger guter, d.h. geräuscharmer Verbrennungsablauf erzielt wird, andererseits aber der noch nicht verbrannte Kraftstoff den relativ kalten Rand und Boden der Kolbenmulde erreicht vor allem bei niedrigen Drehzahlen, sowie im Leerlauf als auch im mittleren Drehzahlbereich bei Halblastbetrieb, und dort insbesondere im Zentrum des Wirbels unzureichend mit Verbrennungsluft vermischt wird und deshalb nur unvollkommen verbrennt. Die schlechte Verbrennung des am Muldenboden haftenden Kraftstoffes wird zusätzlich noch durch die expansionsbedingte Abkühlung negativ beeinflußt.All these designs of piston bowls have the disadvantage that they are unsatisfactory in terms of exhaust gas and noise emissions. The reason for this is that on the one hand, a more or less good, i.e. low-noise combustion process is achieved by wetting the wall, on the other hand, however, the not yet burned fuel reaches the relatively cold edge and bottom of the piston recess especially at low speeds, as well as in idle and in the medium speed range at half load, and there Inadequate with combustion air especially in the center of the vortex is mixed and therefore only burns imperfectly. The bad burning of the sticking to the bottom of the trough Fuel is also negatively influenced by the cooling caused by expansion.
Aufgabe der Erfindung ist es, die Benetzung des Bodens der Kolbenmulde mit Kraftstoff und die damit verbundenen Nachteile zu vermeiden bzw. zu reduzieren.The object of the invention is the wetting of the bottom of the piston recess with fuel and the disadvantages associated therewith to avoid or reduce.
Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved by the characterizing features of claim 1.
Hierdurch wird erreicht, daß insbesondere bei in der ersten Phase verhalten und luftverteilt erfolgter Einspritzung die Kraftstoffteilchen vom Wirbel aufgefangen und mit der Verbrennungsluft gut vermischt werden. Nach Ablauf der Zünd-This ensures that, in particular, when the injection is carried out in a cautious and air-distributed manner in the first phase the fuel particles caught by the vortex and with the Combustion air must be mixed well. After the ignition
130065/0261130065/0261
Daim 12 Daim 12 96O/k96O / k
verzugszeit und voller Einspritzung in der zweiten Phase benetzen die vollen Kraftstoffstrahlen die Seitenwände und bilden einen Film der infolge der kinetischen Energie und der geneigten Seitenwand in Richtung des Bodens der Kolbenmulde abfließt. Während dieses AbfHeßens erfolgt durch Verwirbelung ein fortlaufendes Vermischen mit der Verbrennungsluft, bis schließlich der Ringwulst erreicht ist und der restliche Kraftstoffilm über die heiße und spitz vorspringende Ringwulstkante verdampft,abreißt und vollkommen verwirbelt wird, ohne daß Kraftstoffteilchen den eigentlichen Boden der Kolbenmulde benetzen. Dadurch wird neben einem guten Wirkungsgrad durch eine nahezu vollkommene Verbrennung eine hohe Leistungsausbeute bei maximaler Ausnutzung der Luftladung sichergestellt und somit die Abgas- und Geräuschemission auf ein Minimum gesenkt.delay time and full injection in the second phase the full fuel jets wet the side walls and form a film due to the kinetic energy and the sloping side wall towards the bottom of the Piston bowl drains off. During this measurement, takes place through Turbulence a continuous mixing with the combustion air, until finally the ring bead is reached and the remaining fuel film over the hot and pointed protruding one Annular bead edge evaporates, tears off and completely swirled becomes the actual soil without causing fuel particles wet the piston recess. As a result, in addition to a good degree of efficiency through almost perfect combustion, a high power output with maximum utilization of the air charge ensured and thus the exhaust gas and noise emissions reduced to a minimum.
In vorteilhafter Ausgestaltung der Erfindung kann die Spitze des Ringwulstquerschnittes durch zwei etwa rechtwinklig aufeinander zulaufende Wulstflanken gebildet sein, ferner kann die der Eintrittsöffnung zugekehrt liegende Ringwulstflanke im Querschnitt etwa parallel zum Kolbenboden liegen und im Querschnitt mit einem Radius von 2-5 mm in die Seitenwand übergehen. Dadurch wird ein gutes Abfließen der Wandbenetzung zur Ringwulstkante und ein sicheres Abreißen des Kraftstoffilmes an der heißen Kante des Ringwulstes erreicht.In an advantageous embodiment of the invention, the tip of the annular bead cross-section be formed by two bead flanks converging approximately at right angles, furthermore the annular bead flank facing the inlet opening can be approximately parallel to the piston crown in cross section and in cross section with a radius of 2-5 mm into the side wall pass over. This ensures that the wall wetting can flow off to the edge of the annular bead and that it can be torn off safely of the fuel film on the hot edge of the annular bead achieved.
Außerdem kann die umlaufende Kante des Ringwulstes in einer Ebene parallel zum Kolbenboden verlaufen, wobei der axialeIn addition, the circumferential edge of the annular bead can run in a plane parallel to the piston head, the axial
-4-130065/0261 -4- 130065/0261
Daim 12 96O/4Daim 12 96O / 4
Abstand der Ebene der Ringwulstflanke vom Boden der Kolbenmulde etwa 12 - 33 $ der Gesamttiefe der Kolbenmulde entsprechen kann.Distance of the plane of the annular bead flank from the bottom of the piston bowl about $ 12- $ 33 corresponds to the total depth of the piston recess can.
Dadurch erfolgt das Abreißen des restlichen Kraftstoffilmes über dem gesamten Umfang unter gleichen Strömungsverhältnissen. This causes the remaining fuel film to be torn off over the entire circumference under the same flow conditions.
Um ein sicheres Abreißen des restlichen Kraftstoffilmes an der Ringwulstkante durch Turbulenz zu gewährleisten, kann der Durchmesser der Ringwulstkante etwa dem 0,9 - 1,Ifachen des Durchmessers der Eintrittsöffnung, das ist etwa 0,38 - O,k des Kolbendurchmessers, entsprechen.In order to ensure that the remaining fuel film is reliably torn off at the edge of the annular bulge due to turbulence, the diameter of the annular bulge edge can be approximately 0.9-1.1 times the diameter of the inlet opening, which is about 0.38-0.2 k of the piston diameter.
Des weiteren kann die den Boden der Kolbenmulde zugekehrt liegende Ringwulstflanke im Querschnitt mit einem Radius von etwa 22 - 35 $ der Gesamttiefe in den Boden und die der Eintrittsöffnung zugekehrt liegende Ringwulstkante im Querschnitt mit einem Radius von 2-5 nun i*1 die Seitenwand übergehen.Furthermore, the Ringwulstflanke the bottom of the piston recess faces lying in cross section with a radius of approximately 22 - 35 $ of the total depth into the ground and the inlet opening faces lying Ringwulstkante in cross-section with a radius of 2-5 now i * 1 pass over the side wall .
Nach einem weiteren Merkmal der Erfindung kann der Kolbenmulde eine Einspritzdüse zugeordnet sein, deren Strahl(en) auf die Seitenwand der Kolbenmulde gerichtet ist bzw. sind . und die Auftreffstelle der Einspritzstrahlen kann axial etwa in der Mitte zwischen Ringwulstkante und dem Kolbenboden liegen.According to a further feature of the invention, the piston bowl an injection nozzle, the jet (s) of which is or are directed onto the side wall of the piston recess. and the point of impact of the injection jets can be approximately axially in the middle between the annular bead edge and the piston crown lie.
Durch Verschieben der Einspritzdüse in Achsrichtung derselben kann die Auftreffstelle der Einspritzstrahlen variiert .By moving the injection nozzle in the axial direction of the same, the point of impact of the injection jets can be varied.
130065/0261130065/0261
Daim 12 9-60/4Daim 12 9-60 / 4
werden, wodurch, ein gewisser Einfluß auf den Verbrennungsablauf möglich ist. , whereby a certain influence on the combustion process is possible.
Darüber hinaus kann die Einspritzdüse in an sich bekannter ¥eise exzentrisch zur Kolbenmulde, jedoch noch innerhalb von deren Eintrittsöffnung, angeordnet sein.In addition, the injection nozzle can be eccentric to the piston bowl, but still within it, in a manner known per se be arranged from the inlet opening.
In weiterer Ausgestaltung der Erfindung kann der Konizitätswinkel der Seitenwände etwa 7 - 15 betragen. Bei größerem Konizitätswinkel verringert sich der Drall; dies ist jedoch für eine gute Luft/Kraftstoff-Vermischung nachteilig. In a further embodiment of the invention, the angle of conicity of the side walls can be approximately 7-15. at The twist decreases with a larger angle of conicity; however, this is detrimental to good air / fuel mixing.
Schließlich kann die Gesamttiefe der Kolbenmulde etwa das 0,6 - 0,8fache des Durchmessers der Eintrittsöffnung betragen. Finally, the total depth of the piston recess can be approximately 0.6-0.8 times the diameter of the inlet opening.
-Anhand eines in der Zeichnung dargestellten Ausführungsbeispiels soll die Erfindung näher erläutert werden. Es zeigen:The invention will be explained in more detail using an exemplary embodiment shown in the drawing. It demonstrate:
Fig. 1 einen Ausschnitt eines Kolbenbodens mit einer Anordnung der Einspritzdüse im Zylinderkopf und1 shows a section of a piston head with an arrangement of the injection nozzle in the cylinder head and
Fig. 2 eine Anordnung von Kolben und Einspritzdüse im Grundriß.Fig. 2 shows an arrangement of the piston and injection nozzle in plan.
Der in den Figuren dargestellte Kolben 1 weist in seinem Kolbenboden 2 eine rotationssymmetrische Kolbenmulde 3 auf,The piston 1 shown in the figures has a rotationally symmetrical piston bowl 3 in its piston head 2,
130065/0261 -6-130065/0261 -6-
-3--3-
Palm 12 960/4Palm 12 960/4
die aus einem zylindrischen Hals 4 und den sich, anschliessenden konischen Seitenwänden 5 gebildet wird, wobei zwischen Seitenwand 5 und Boden 6 ein umlaufender, im Querschnitt spitz vorspringender Ringwulst ~ vorgesehen ist.that of a cylindrical neck 4 and the subsequent ones conical side walls 5 is formed, with a circumferential cross-section between the side wall 5 and the bottom 6 a pointed annular bead ~ is provided.
Der Ringwulst 7 wird durch zwei etwa rechtwinklig aufeinander zulaufende Ringwulstflanken 8, 9 gebildet. Die der Eintrittsöffnung 10 zugekehrt liegende Ringwulstflanke 9 liegt im Querschnitt etwa parallel zum Kolbenboden 2 und geht mit einem Radius 9' von etwa 2-3 nun in die Seitenwand 5 über. Die umlaufende Kante 11 des Ringwulstes 7 verläuft hierbei in einer Ebene parallel zum Boden 6 der Kolbenmulde 3· Der axiale Abstand 12 der Ebene der Ringwulstflanke 9 vom Boden 6 beträgt etwa 12 - 33 /^ der Gesamttiefe 18 der Kolbenmulde 3· Es hat sich als Vorteilhaft erwiesen, wenn der Durchmesser der Ringwulstkante 11 etwa dem 0,9 - 1,1 fachen Durchmesser der Eintritts öffnung 10 angepaßt wird, wobei der Durchmesser der Eintrittsöffnung etwa 0,3S - ο,4 des Kolbendurchmessers 19 ist.The annular bead 7 is formed by two annular bead flanks 8, 9 converging approximately at right angles to one another. That of the inlet opening 10 facing annular bulge flank 9 is located in cross section approximately parallel to the piston head 2 and now goes into the side wall 5 with a radius 9 ′ of approximately 2-3 above. The circumferential edge 11 of the annular bead 7 runs in a plane parallel to the bottom 6 of the piston recess 3 The axial distance 12 of the plane of the annular bead flank 9 from Bottom 6 is about 12 - 33 / ^ of the total depth 18 of the piston bowl 3 · It has proven to be advantageous if the diameter of the annular bead edge 11 is approximately 0.9-1.1 times Diameter of the inlet opening 10 is adapted, wherein the diameter of the inlet opening about 0.3S - ο.4 des Piston diameter 19 is.
Der Boden 6 der Kolbenmulde 3 kann mit einem Radius von etwa 20 - 35 ^ der Gesamttiefe 18 in die Ringwulstflanke 8 übergehen.The bottom 6 of the piston recess 3 can have a radius of about 20 - 35 ^ of the total depth 18 in the annular bulge flank 8 pass over.
Vorteilhafterveise wird der Kolbenmulde 3 eine Einspritzdüse 13 zugeordnet, deren Strahl (en )1 '4, 15) 1ö alle auf die Seitenwand 5 der Kolbenmulde 3 gerichtet ist bzw. sind, und etwa axial in der Mitte zwischen der Ringwulstkante 11 und dem Kolbenboden 2 auftreffen. Die Einspritzdüse 13Vorteilhafterveise of the piston recess is assigned an injection nozzle 13 3, the beam or are (s) 1 '4, 15) 1Ö all is directed to the side wall 5 of the piston recess 3, and approximately axially midway between the Ringwulstkante 11 and the piston crown 2 hit. The injector 13
130065/0261130065/0261
- ST - - ST - Daim 12 9-60/4Daim 12 9-60 / 4
kann in an sich bekannter Weise exzentrisch zur Kolbenmulde 3> jedoch noch innerhalb deren Eintrittsöffnung 10 angeordnet sein. Zur Erhaltung des Dralles hat es sich als vorteilhaft erwiesen, den Konizitätswinkel 17 der Seitenwände 5 in den Grenzen von 7 bis 15 zu halten. Die Gesamthöhe 18 soll hierbei jedoch nicht größer als das 0,6 - 0,8fache des Durchmessers der Eintrittsöffnung 10 sein.can be eccentric to the piston bowl in a manner known per se 3> but still within their inlet opening 10 be arranged. To maintain the twist, it has proven advantageous to adjust the angle of conicity 17 of the side walls 5 to be kept within the limits of 7 to 15. The total height However, 18 should not be greater than the 0.6 - 0.8 times the diameter of the inlet opening 10.
130065/0261130065/0261
Claims (14)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3025943A DE3025943C2 (en) | 1980-07-09 | 1980-07-09 | Self-igniting internal combustion engine with a rotationally symmetrical piston bowl |
IT48794/81A IT1171348B (en) | 1980-07-09 | 1981-06-30 | SELF-IGNITION INTERNAL COMBUSTION ENGINE WITH ROTATION SYMMETRY FISTON CAVITY |
GB8120660A GB2079371B (en) | 1980-07-09 | 1981-07-03 | Compression ignition engine having a rotationally symmetrical piston combustion chamber |
JP10457481A JPS5738615A (en) | 1980-07-09 | 1981-07-06 | Self-ignition internal combustion engine with piston recess symmetrical of rotation |
FR8113330A FR2486587B1 (en) | 1980-07-09 | 1981-07-07 | COMBUSTION IGNITION INTERNAL COMBUSTION ENGINE OF THE MUNI TYPE IN THE PISTON HEAD OF A PISTON BOWL OF THE SHAPE CORRESPONDING TO THAT OF A REVOLUTION BODY |
US06/281,028 US4392465A (en) | 1980-07-09 | 1981-07-07 | Self-igniting internal combustion engine with a rotationally symmetrical piston trough |
SE8104255A SE448642B (en) | 1980-07-09 | 1981-07-08 | DIESEL TYPE COMBINATION ENGINE PISTON WITH A TOP ROTATION SYMMETRIC DROP |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3025943A DE3025943C2 (en) | 1980-07-09 | 1980-07-09 | Self-igniting internal combustion engine with a rotationally symmetrical piston bowl |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3025943A1 true DE3025943A1 (en) | 1982-02-04 |
DE3025943C2 DE3025943C2 (en) | 1983-03-17 |
Family
ID=6106758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3025943A Expired DE3025943C2 (en) | 1980-07-09 | 1980-07-09 | Self-igniting internal combustion engine with a rotationally symmetrical piston bowl |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS5738615A (en) |
DE (1) | DE3025943C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015026700A1 (en) * | 2013-08-21 | 2015-02-26 | Caterpillar Inc. | Combustion engine piston and engine using same |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5979029A (en) * | 1982-10-28 | 1984-05-08 | Hino Motors Ltd | Combustion chamber of internal-combustion engine |
JPH0238028Y2 (en) * | 1984-11-13 | 1990-10-15 | ||
JPH0216032Y2 (en) * | 1984-11-13 | 1990-05-01 | ||
JPH01131823U (en) * | 1988-03-02 | 1989-09-07 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1032597B (en) * | 1955-05-13 | 1958-06-19 | Luebecker Maschb Ag | Injection internal combustion engine with combustion chamber located in the piston |
GB1249519A (en) * | 1968-07-31 | 1971-10-13 | Daimler Benz Ag | Internal combustion piston engines with fuel injection |
DE2652662A1 (en) * | 1976-09-23 | 1978-03-30 | Lister & Co Ltd R A | INTERNAL COMBUSTION ENGINE WITH A SUSPECTING PISTON |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1095583A (en) * | ||||
DE2815717A1 (en) * | 1977-04-29 | 1978-11-02 | List Hans | AIR COMPRESSING, DIRECT INJECTING COMBUSTION ENGINE |
JPS6056893B2 (en) * | 1977-12-09 | 1985-12-12 | いすゞ自動車株式会社 | combustion chamber |
-
1980
- 1980-07-09 DE DE3025943A patent/DE3025943C2/en not_active Expired
-
1981
- 1981-07-06 JP JP10457481A patent/JPS5738615A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1032597B (en) * | 1955-05-13 | 1958-06-19 | Luebecker Maschb Ag | Injection internal combustion engine with combustion chamber located in the piston |
GB1249519A (en) * | 1968-07-31 | 1971-10-13 | Daimler Benz Ag | Internal combustion piston engines with fuel injection |
DE2652662A1 (en) * | 1976-09-23 | 1978-03-30 | Lister & Co Ltd R A | INTERNAL COMBUSTION ENGINE WITH A SUSPECTING PISTON |
Non-Patent Citations (1)
Title |
---|
KFT 1980, S. 127 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015026700A1 (en) * | 2013-08-21 | 2015-02-26 | Caterpillar Inc. | Combustion engine piston and engine using same |
US9429101B2 (en) | 2013-08-21 | 2016-08-30 | Caterpillar Inc. | Combustion engine piston and engine using same |
Also Published As
Publication number | Publication date |
---|---|
JPS5738615A (en) | 1982-03-03 |
JPS6229611B2 (en) | 1987-06-26 |
DE3025943C2 (en) | 1983-03-17 |
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