DE3642376A1 - PISTON OF A DIESEL ENGINE - Google Patents

PISTON OF A DIESEL ENGINE

Info

Publication number
DE3642376A1
DE3642376A1 DE19863642376 DE3642376A DE3642376A1 DE 3642376 A1 DE3642376 A1 DE 3642376A1 DE 19863642376 DE19863642376 DE 19863642376 DE 3642376 A DE3642376 A DE 3642376A DE 3642376 A1 DE3642376 A1 DE 3642376A1
Authority
DE
Germany
Prior art keywords
piston
chamber
air
vortex
swirl chamber
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.)
Ceased
Application number
DE19863642376
Other languages
German (de)
Inventor
Wallace R Wade
Charles B Hunter
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.)
Ford Werke GmbH
Original Assignee
Ford Werke GmbH
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 Ford Werke GmbH filed Critical Ford Werke GmbH
Publication of DE3642376A1 publication Critical patent/DE3642376A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/28—Other pistons with specially-shaped head
    • F02F3/285—Other pistons with specially-shaped head the head being provided with an insert located in or on the combustion-gas-swept surface
    • 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
    • F02B21/00—Engines characterised by air-storage chambers
    • F02B21/02—Chamber shapes or constructions
    • 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
    • F02B23/0603—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 at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head
    • 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
    • F02B23/0627—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 having additional bores or grooves machined into the piston for guiding air or charge flow to the piston bowl
    • 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
    • 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
    • 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
    • F02B23/0669—Details related to the fuel injector or the fuel spray having multiple fuel spray jets per injector nozzle
    • 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

Description

Die Erfindung bezieht sich auf einen Kolben eines Diesel­ motors der durch den Oberbegriff des Patentanspruchs 1 angegebenen Gattung.The invention relates to a piston of a diesel motors by the preamble of claim 1 specified genus.

Bei einem aus SAE Paper 8 31 297 vom 12./15. September 1983, S. 107, 111 bekannten Kolben dieser Art ist für die Verhältnis­ se eines dort für eine Optimierung des Verbrennungsablaufs untersuchten Testmotors die Luftkammer oberhalb der Wirbel­ kammer mit einer diagonalen oder auch tangentialen Ausrich­ tung einer einzigen Auslaßdüse in der Art und Weise ausge­ bildet, daß die Sekundärluft in den späten Phasen des Ver­ brennungsablaufs des Brennstoff-Luft-Gemisches eine Oxida­ tion aller bis dahin noch unverbrannt gebliebenen Brenn­ stoffteilchen fördert. Diese Wirkung eines erst während des Expansionshubes des Kolbens eines Dieselmotors zur Freigabe kommenden Sekundäranteils der Verbrennungsluft ist auch in SAE Paper 8 40 515 vom 27.2./2.3.1984, S.18, beschrieben, wo­ bei aber dort irgendwelche Angaben über konstruktive Details fehlen.With one from SAE Paper 8 31 297 from 12./15. September 1983, P. 107, 111 known pistons of this type is for the ratio se one there for an optimization of the combustion process test engine examined the air chamber above the vertebrae chamber with a diagonal or tangential alignment tion of a single outlet nozzle in the way out forms that the secondary air in the late stages of Ver combustion process of the fuel-air mixture an oxide tion of all distilleries that had not yet been burned promotes material particles. This effect of one only during the Expansion stroke of the piston of a diesel engine for release coming secondary portion of the combustion air is also in SAE Paper 8 40 515 dated February 27, March 21, 1984, p. 18, where at but there any information about constructive details absence.

Aus den US-PS′en 41 28 092, 41 75 531, 41 75 533 und 44 44 166 sind daneben Ausbildungen von Brennkammern bekannt, die in einen Hauptbrennraum und einen damit verbundenen Vorbrenn­ raum unterteilt sind. Aus der US-PS 39 19 982 ist außerdem ein Otto-Motor bekannt, bei dem jeder Kolben mit Bohrlöchern im Kolbenboden versehen ist, die im Ansaughub mit Luft ge­ füllt werden, um später während des Verbrennungsablaufs in der Brennkammer eine Oxidation von unverbrannten Kohlenwas­ serstoffen und von Kohlenmonoxid zu fördern.From US-PS's 41 28 092, 41 75 531, 41 75 533 and 44 44 166 are also known designs of combustion chambers, which in a main combustion chamber and an associated pre-combustion space are divided. From US-PS 39 19 982 is also known an Otto engine, in which each piston with boreholes is provided in the piston crown, which ge with air in the intake stroke be filled in later during the combustion process oxidation of unburned coal water in the combustion chamber and carbon monoxide.

Die durch die Patentansprüche gekennzeichnete Erfindung löst die Aufgabe, einen Kolben eines Dieselmotors der an­ gegebenen Gattung derart auszubilden, daß eine Oxidation der Brennstoffpartikel während des Expansionshubes des Kol­ bens optimiert wird.The invention characterized by the claims solves the problem of a piston of a diesel engine given genus in such a way that oxidation the fuel particles during the expansion stroke of the Kol bens is optimized.

Die durch den erfindungsgemäßen Kolben erzielten Vorteile liegen im wesentlichen darin, daß durch die Integrierung der Luftkammer am Kolben die Zuleitung der Sekundärluft in die im Kolbenboden ausgebildete Wirbelkammer jetzt un­ mittelbar von den sich während des Expansionshubes des Kol­ bens verändernden Druckverhältnissen beeinflußt wird und so­ mit stets gewährleistet ist, daß wegen der im Expansionshub des Kolbens anfänglich größeren Druckhöhe der Sekundärluft deren Zuleitung die in der Wirbelkammer dann unterhaltene Wirbelströmung intensiviert und also als Folge des mit die­ ser Sekundärluft zusätzlich herangeführten Sauerstoffs eine Oxidation der Brennstoffteilchen fördert. Wenn somit die Se­ kundärluft vorzugsweise in der angegebenen Teilmenge aus einer solchen direkt im Kolben ausgebildeten Luftkammer zu­ geleitet wird, dann wird damit ein Dieselmotor erhalten, bei dem der Ausstoß an Schadstoffen insgesamt entsprechend verringert ist.The advantages achieved by the piston according to the invention are essentially that through integration the air chamber on the piston the supply of secondary air un into the swirl chamber formed in the piston crown indirectly from those during the expansion stroke of the Kol bens changing pressure conditions is influenced and so is always guaranteed that because of the expansion stroke of the piston initially higher pressure level of the secondary air whose supply line is then maintained in the swirl chamber Eddy flow intensifies and as a result of that with the this secondary air additionally introduced oxygen one Oxidation of the fuel particles promotes. So if the Se secondary air preferably in the specified amount such an air chamber formed directly in the piston then a diesel engine is obtained, where the total emission of pollutants accordingly is reduced.

Ein Ausführungsbeispiel des erfindungsgemäßen Kolbens ist in der Zeichnung schematisch dargestellt. Es zeigtAn embodiment of the piston according to the invention is shown schematically in the drawing. It shows

Fig. 1 eine Draufsicht des Kolbens ge­ mäß einer ersten Ausführungsform, Fig. 1 is a plan view of the piston accelerator as a first embodiment;

Fig. 2 einen Teilschnitt des Kolbens nach der Linie II-II in Fig. 1, Fig. 2 shows a partial section of the piston taken along the line II-II in Fig. 1,

Fig. 3 eine Draufsicht des Kolbens gemäß einer zweiten Ausführungsform und Fig. 3 is a plan view of the piston according to a second embodiment and

Fig. 4 einen Teilschnitt des Kolbens nach der Linie IV-IV in Fig. 3. Fig. 4 shows a partial section of the piston taken along the line IV-IV in Fig. 3.

Der in den Fig. 1 und 2 für eine erste Ausführungsform gezeigte Kolben 10 ist für einen mit einer Direktein­ spritzung des Brennstoffs betriebenen Dieselmotor vorge­ sehen und weist dafür neben den üblichen Ringnuten 12 eine Wirbelkammer 14 auf, die durch einen in eine Ausnehmung an der Stirnseite 20 des Kolbenbodens eingesetzten topfförmi­ gen Einsatzkörper 16 ausgebildet ist. In der Mantelfläche 24 dieses Einsatzkörpers 16 ist ein die Wirbelkammer 14 umgebender Ringkanal 26 ausgebildet, der somit durch die umgebende Wand der das Einsatzstück 16 aufnehmenden Ausneh­ mung des Kolbenbodens abgedeckt ist und eine Luftkammer bil­ det, die an die Wirbelkammer 14 mit vier in Umfangsrichtung der Wirbelkammer gleich beabstandeten Auslaßdüsen 28 ange­ schlossen ist. Jede dieser Auslaßdüsen 28 weist eine bezüg­ lich der Wirbelkammer 14 im wesentlichen tangentiale Aus­ richtung mit einer in der Nähe des Bodens der Wirbelkammer angeordneten Mündung auf, über welche somit die Verbindung zu der als Luftkammer vorgesehenen Ringnut 26 hergestellt ist.The piston 10 shown in FIGS . 1 and 2 for a first embodiment is provided for a diesel engine operated with a direct injection of fuel and, in addition to the usual annular grooves 12, has a swirl chamber 14 through a through a recess in the end face 20 of the piston head inserted pot-shaped insert body 16 is formed. In the lateral surface 24 of this insert body 16 , an annular channel 26 surrounding the swirl chamber 14 is formed, which is thus covered by the surrounding wall of the insert 16 receiving recess of the piston crown and an air chamber bil det, which is connected to the swirl chamber 14 with four in the circumferential direction Vortex chamber equally spaced outlet nozzles 28 is closed. Each of these outlet nozzles 28 has a bezüg Lich the swirl chamber 14 substantially tangential direction with a near the bottom of the swirl chamber arranged mouth, via which the connection to the air groove provided as an air chamber 26 is thus made.

Bei der in den Fig. 3 und 4 gezeigten zweiten Ausführungs­ form ist eine entsprechende Wirbelkammer 14 des Kolbens 10 direkt durch eine Ausnehmung des Kolbenbodens ausgebildet und von einer Luftkammer 30 umgeben, die mit vier in Um­ fangsrichtung der Wirbelkammer 14 gleich beabstandeten Bohrlöchern 32 gebildet ist. In jedes Bohrloch 32 ist ein mit einer Axialbohrung 34 versehener Einsatzkörper 36 ein­ gesetzt, womit den Auslaßdüsen 28 entsprechende Auslaßdü­ sen erhalten sind, über deren in der Nähe des Bodens der Wirbelkammer 14 angeordnete Mündung somit jeweils eine Ver­ bindung mit dem jeweils zugeordneten Bohrloch 32 besteht.When in Figs. 3 and 4, the second execution form a corresponding vortex chamber 14 is of the piston 10 formed directly through a recess of the piston crown, and surrounded by an air chamber 30 provided with four in order circumferential direction of the swirl chamber 14 equally spaced holes 32 is formed . In each borehole 32 is provided with an axial bore 34 insert body 36 , with which the outlet nozzles 28 corresponding Auslaßdü sen are obtained, via the mouth arranged near the bottom of the swirl chamber 14 thus a connection with the respectively assigned borehole 32 .

Den beiden Ausführungsformen des Kolbens 10 ist gemeinsam, daß die Ringnut 26 bzw. die vier Axialbohrungen 34 im Ver­ dichtungshub des Kolbens eine Füllung mit Sekundärluft er­ fahren, die dann im Expansionshub des Kolbens über die Aus­ laßdüsen 28 bzw. 34 eine Freigabe in die Wirbelkammer 14 er­ fährt. Die Freigabe der Sekundärluft, deren Speichervolumen gleich einem Bruchteil, insbesondere gleich etwa 1 bis 10%, des in der oberen Totpunkt-Position des Kolbens 10 vorhande­ nen Freiraumes ist, wird dabei durch den Umstand begünstigt, daß im Expansionshub des Kolbens in der Wirbelkammer 14 ein gegenüber dem Verdichtungsdruck geringerer Druck vorliegt, so daß also die unter dem Verdichtungsdruck in der jeweili­ gen Luftkammer gespeicherte Sekundärluft bei ihrer Freigabe sämtliche Brennstoffpartikel der dann in der Wirbelkammer 14 unterhaltenen Wirbelströmung erreichen kann. Da für den Zeit­ punkt der Freigabe der Sekundärluft vorausgesetzt werden kann, daß dann in der Wirbelkammer 14 eine Temperatur von mehr als etwa 1600°K vorherrscht, wird mit dem in der Sekundärluft enthaltenen Sauerstoff ein sehr wirksamer Oxidationsprozeß für die Brennstoffpartikel unterhalten, wobei die Oxidation gleichzeitig damit begünstigt wird, daß die Freigabe der Se­ kundärluft im wesentlichen entgegen der in der Wirbelkammer unterhaltenen Wirbelströmung vorgenommen wird. Die im Expan­ sionshub des Kolbens in die Wirbelkammer 14 entlassene Sekun­ därluft erfährt dann nämlich eine besonders intensive Durch­ mischung und gleichzeitig eine sehr intensive Kontaktierung mit den Brennstoffpartikeln, was zur Folge hat, daß damit die Schadstoffemissionen des Dieselmotors weiter verringert werden können.The two embodiments of the piston 10 have in common that the annular groove 26 and the four axial bores 34 in the sealing stroke of the piston, a filling with secondary air he drive, which are then released in the expansion stroke of the piston via the outlet nozzles 28 and 34 into the swirl chamber 14 he drives. The release of the secondary air, the storage volume of which is equal to a fraction, in particular approximately 1 to 10%, of the free space present in the top dead center position of the piston 10 is favored by the fact that in the expansion stroke of the piston in the swirl chamber 14 there is a lower pressure than the compression pressure, so that the secondary air stored under the compression pressure in the respective air chamber can reach all fuel particles of the vortex chamber 14 then maintained when released. Since it can be assumed for the time at which the secondary air is released that a temperature of more than about 1600 ° K then prevails in the swirl chamber 14, a very effective oxidation process for the fuel particles is maintained with the oxygen contained in the secondary air, the oxidation at the same time it is favored that the release of the secondary air is carried out essentially against the vortex flow maintained in the vortex chamber. The expansion stroke of the piston in the swirl chamber 14 released därluft then experiences a particularly intensive mixing and at the same time a very intensive contact with the fuel particles, with the result that the pollutant emissions of the diesel engine can be further reduced.

Claims (6)

1. Kolben eines Dieselmotors mit einer Direkteinspritzung des Brennstoffs in eine im Kolbenboden ausgebildete Wir­ belkammer und mit einer Luftkammer, die zur Aufnahme von Sekundärluft im Verdichtungshub und für deren Frei­ gabe im Expansionshub des Kolbens über eine in die Wir­ belkammer mündende Auslaßdüse vorgesehen ist, dadurch gekennzeichnet, daß die Luftkammer (26, 30) eine die Wirbelkammer (14) umgebende Ausbildung im Kolben (10) aufweist und mit mehreren in Umfangsrich­ tung der Wirbelkammer voneinander beabstandeten Auslaß­ düsen (28, 34) versehen ist, die alle auf die in der Wir­ belkammer (14) unterhaltene Wirbelströmung ausgerichtet sind.1. Piston of a diesel engine with a direct injection of the fuel into a piston chamber formed in the we belkammer and with an air chamber, which is provided for receiving secondary air in the compression stroke and for their release in the expansion stroke of the piston via an outlet nozzle opening into the we chamber, thereby characterized in that the air chamber ( 26 , 30 ) has a formation surrounding the swirl chamber ( 14 ) in the piston ( 10 ) and is provided with a plurality of outlet nozzles ( 28 , 34 ) spaced apart from one another in the circumferential direction of the swirl chamber, all of which are arranged in the We vortex chamber ( 14 ) entertaining eddy flow are aligned. 2. Kolben nach Anspruch 1, dadurch gekennzeichnet, daß die Luftkam­ mer (26, 30) zur Aufnahme eines Speichervolumens der Se­ kundärluft gleich einem Bruchteil, insbesondere gleich etwa 1 bis 10%, des in der oberen Totpunkt-Position des Kolbens (10) vorhandenen Freiraumes bemessen ist.2. Piston according to claim 1, characterized in that the Luftkam mer ( 26 , 30 ) for receiving a storage volume of the secondary air equal to a fraction, in particular equal to approximately 1 to 10%, of the top dead center position of the piston ( 10 ) existing space is dimensioned. 3. Kolben nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Luftkam­ mer mit einem die Wirbelkammer (14) konzentrisch umgeben­ den Ringkanal (26) gebildet ist, an welchen die Auslaß­ düsen (28) mit einer bezüglich der Wirbelkammer (14) tangentialen Ausrichtung entgegen der Wirbelströmung angeschlossen sind.3. Piston according to claim 1 or 2, characterized in that the Luftkam mer with a vortex chamber ( 14 ) concentrically surrounding the annular channel ( 26 ) is formed, on which the outlet nozzles ( 28 ) with a with respect to the vortex chamber ( 14 ) tangential Alignment against the vortex flow are connected. 4. Kolben nach Anspruch 3, dadurch gekennzeichnet, daß der Ring­ kanal (26) in der Mantelfläche eines zur Ausbildung der Wirbelkammer (14) topfförmigen Einsatzkörpers (16) des Kolbens (10) vorgesehen ist.4. Piston according to claim 3, characterized in that the ring channel ( 26 ) in the outer surface of a pot-shaped insert body ( 16 ) for forming the swirl chamber ( 14 ) of the piston ( 10 ) is provided. 5. Kolben nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Luftkammer (30) mit einzelnen Bohrlöchern (32) gebildet ist, die mit einer jeweils zugeordneten Auslaßdüse (34) in den Boden der Wirbelkammer (14) münden.5. Piston according to claim 1 or 2, characterized in that the air chamber ( 30 ) is formed with individual boreholes ( 32 ) which open into the bottom of the swirl chamber ( 14 ) with an associated outlet nozzle ( 34 ). 6. Kolben nach Anspruch 5, dadurch gekennzeichnet, daß jede Auslaß­ düse als eine Axialbohrung (34) eines zylindrischen Ein­ satzkörpers (36) des zugeordneten Bohrlochs (32) ausge­ bildet ist.6. Piston according to claim 5, characterized in that each outlet nozzle is formed as an axial bore ( 34 ) of a cylindrical insert body ( 36 ) of the associated borehole ( 32 ).
DE19863642376 1985-12-23 1986-12-11 PISTON OF A DIESEL ENGINE Ceased DE3642376A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81270285A 1985-12-23 1985-12-23

Publications (1)

Publication Number Publication Date
DE3642376A1 true DE3642376A1 (en) 1987-07-02

Family

ID=25210380

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863642376 Ceased DE3642376A1 (en) 1985-12-23 1986-12-11 PISTON OF A DIESEL ENGINE

Country Status (3)

Country Link
JP (1) JPS62157227A (en)
DE (1) DE3642376A1 (en)
GB (1) GB2184485B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9605838D0 (en) * 1996-03-20 1996-05-22 Perkins Ltd A method for producing a piston for an internal combustion engine and a piston produced by the method
GB2318402A (en) * 1996-10-17 1998-04-22 T & N Technology Ltd Piston with cavity

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE669224C (en) * 1935-05-04 1938-12-20 Else Gockerell Air-compressing injection internal combustion engine with self-ignition
DE676997C (en) * 1931-11-20 1939-06-16 Fahrzeug Und Motorenwerke G M Self-igniting, air-compressing internal combustion engine
FR1457214A (en) * 1965-12-06 1966-10-28 Transports Automobiles Des Hau Thermal engine with air reserve chambers in the pistons and causing, because of their arrangement, a very strong turbulence of the gases during combustion
DE2823483A1 (en) * 1978-05-30 1979-12-06 Kloeckner Humboldt Deutz Ag Diesel engine combustion chamber system - has fuel jet striking throttle opening of auxiliary combustion chamber under weak air movement
DE3405715A1 (en) * 1983-02-17 1984-09-06 Hans 4600 Dortmund Dressendörfer Internal combustion engine for low-volatility fuels

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR380692A (en) * 1907-03-18 1907-12-14 Emile Reno Device for transforming reciprocating rectilinear motion into continuous circular motion and application of this device to machines and motors of all systems
GB311834A (en) * 1927-12-23 1929-05-23 Oil Engine Dev Company Improvements relating to liquid-fuel injection apparatus for oil-engines
GB355459A (en) * 1929-08-05 1931-08-27 Maschinenfabrik Augsburg-Nuernberg A.G.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE676997C (en) * 1931-11-20 1939-06-16 Fahrzeug Und Motorenwerke G M Self-igniting, air-compressing internal combustion engine
DE669224C (en) * 1935-05-04 1938-12-20 Else Gockerell Air-compressing injection internal combustion engine with self-ignition
FR1457214A (en) * 1965-12-06 1966-10-28 Transports Automobiles Des Hau Thermal engine with air reserve chambers in the pistons and causing, because of their arrangement, a very strong turbulence of the gases during combustion
DE2823483A1 (en) * 1978-05-30 1979-12-06 Kloeckner Humboldt Deutz Ag Diesel engine combustion chamber system - has fuel jet striking throttle opening of auxiliary combustion chamber under weak air movement
DE3405715A1 (en) * 1983-02-17 1984-09-06 Hans 4600 Dortmund Dressendörfer Internal combustion engine for low-volatility fuels

Also Published As

Publication number Publication date
GB2184485A (en) 1987-06-24
GB8625172D0 (en) 1986-11-26
GB2184485B (en) 1989-10-11
JPS62157227A (en) 1987-07-13

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