DE1601968A1 - Piston crown design in internal combustion engines with a vortex pan combustion chamber - Google Patents

Piston crown design in internal combustion engines with a vortex pan combustion chamber

Info

Publication number
DE1601968A1
DE1601968A1 DE19681601968 DE1601968A DE1601968A1 DE 1601968 A1 DE1601968 A1 DE 1601968A1 DE 19681601968 DE19681601968 DE 19681601968 DE 1601968 A DE1601968 A DE 1601968A DE 1601968 A1 DE1601968 A1 DE 1601968A1
Authority
DE
Germany
Prior art keywords
vortex
combustion chamber
piston crown
internal combustion
piston
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.)
Pending
Application number
DE19681601968
Other languages
German (de)
Inventor
Hermann Dr-Ing Klaue
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of DE1601968A1 publication Critical patent/DE1601968A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F02B23/0642—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 depth of the combustion space being much smaller than the diameter of the piston, e.g. the depth being in the order of one tenth of the diameter
    • 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
    • F02B23/0621—Squish 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
    • F02B23/0618—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
    • 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

Entgegen der bisher vertretenen Auffassung hat sich bei Diesel- und neuerdings auch bei Otto-Motoren herausgestellt, dass sich der mittlere Dz'uck und damit die Motorleistung durch Anordnung des Brennrauras im Kolbenboden statt im Zy-1 indorkopf vergrössern lässt. Die Leistung wird grosser bei stärkerer Durchwirbelung des Gasgemischs vor dem Zündzeitpunkt. Deshalb setzen sich Motorbauarten durch, bei denen der Brennraum eine Wlrbelwanne im Kolben bildet und die Wirbelströmung durch Quetschwirkung zwischen Kolbenboden - Aussenrnndflöchen und Zylinderkopf erzeugt wird.Contrary to the opinion held up to now, diesel and recently it has also been shown with Otto engines that the mean pressure and thus the engine power by arranging the distillation gas in the piston crown instead of in the Zy-1 indor head. The performance is greater at stronger turbulence of the gas mixture before the ignition point. This is why engine types are becoming more prevalent in which the combustion chamber forms a swirl trough in the piston and the swirl flow due to the squeezing effect between the piston crown and the outer rim and cylinder head is generated.

Die Erfindung bezieht sich auf eine derartige Brennraumausbildung und hat sich zur Aufgabe gesetzt, eine noch intensivere Durchmischung des Frischgases zu bewirken, um den Motorwirkungsgrad noch zu vorbessern. Es sind Dieselmotorenlösungen ausgeführt woi'dcm, bei denen die durch Quetschwirkung erzielte! Wirbelung durch eine Rotationsströmung um die Wirbel- »</nnnenmittenaeh.se herum überlagert wird. Diese Strömung wird durch Anordnung eines Schirms am Einlassventil erreicht, eine Mnpsnahme, die wegen der damit verbundenen thermisch nachteiligen Ventilgestaltung und der im ganzen verschlechterten ELnIαsströmung nachteilig ist. Gemäss Vorschlag vorliegender Erfindung wird die gleiche Strömungswirkung mit einfacheren Mitteln ohne Veränderung der Einlassventile, also ohne Verschlechterung des Gasstoffwechsels erreicht.The invention relates to such a combustion chamber design and has set itself the task of bringing about an even more intensive mixing of the fresh gas in order to improve the engine efficiency even further. Diesel engine solutions are implemented where the crushing effect achieved! Vortex is superimposed by a rotational flow around the vortex »</nnnenmitteaeh.se around. This flow is achieved by arrangement of a screen at the inlet valve, a Mnpsnahme, the α due to the associated thermal adverse valve design and the deterioration in the whole élni sströmung is disadvantageous. According to the proposal of the present invention, the same flow effect is achieved with simpler means without changing the inlet valves, that is to say without worsening the gas metabolism.

hvfinduiigsgemnss werden auf dem den Wirbelwannenbrennraum umgebenden Kolbenrand tangential zur Aussenkontur der runden oder eines runden Teiles der Wirbelwanne verlaufende, flache Kanäle angeordnet. Durch diese Massnahme wird einmal die erwünschte Quetschwirkung aufrecht erhalten und zusätzlich ein intensiver Rotafcionswirbel erzeugt. hvf induiigsgemnss are arranged on the edge of the piston surrounding the vortex tank combustion chamber tangentially to the outer contour of the round or a round part of the vortex tank extending, flat channels. This measure maintains the desired squeezing effect and also creates an intense rotation vortex.

Tn den Abbildungen sind AusfUhrungsbeispielje der Erfindung dargestellt. In Fig, 1 ist die obere Partie des Kolbens mitThe figures are exemplary embodiments of the invention shown. In Fig, 1 the upper part of the piston is with

109816/0239109816/0239

«an*"at*

16 O1J16 O 1 y

Zylinderkopfabschluss bei Anordnung einer einzigen zentralen Virbelwanne im Kolbenboden im Querschnitt und in Fig. 2 die Draufsicht auf* den Kolben dargestellt. .In Fig. 3 und h ist eine Lösung mit einer doppelten achtförmlgen Wirbölwanne, die bei Anwendung von zwei Ventilen verwendet xiorden kann, veranschaulicht. In den Abbildungen ist der- Kolben mit 1, der Zylinder mit 2 und der Zylinderkopf mit 3 bezeichnet. Die Wirbelwanne h, deren Mitteuachse im Beispiel nach Fig. 1 und 2 mit der Kolbenraitfconachse zusammenfällt, ist zweckniassigerweise so ausgebildet, dass beim Verdichtungshub die durch Pfeile 5 gekennzeichnete Quetschwii'bclung entsteht. Wie Flg. 2 erkennen läs^t, sind tangential zur kreis!örmigen Aussenbegrcmzung der Wirbelwanno vier abgerundete, zur Wirbelwanne hin tiefei' werdende Ausnehmungen 6 angeordnet, die die durch Pfeile 7 gekennzeichnete Rota tionsströmung erzeugen. Im Ausführungsboispiol nach den Figuren 3 und h ist die Wirbelwanne 8 achtförmig ausgebildet und jeder Wirbelwannenhälfte ein tangential verlaufender Kanal 9 zugeordnefc. Die mit 10 gekonnzeichnete Ouetschwirbelung wird durch die Rotati onaströmung 3.1 überlagert.Cylinder head closure with arrangement of a single central Virbelwanne in the piston head in cross section and in Fig. 2 the top view of the piston shown. In Fig. 3 and h , a solution with a double eight-shaped vortex pan, which can be used when using two valves, is illustrated. In the figures, the piston is denoted by 1, the cylinder by 2 and the cylinder head by 3. The vortex trough h, the center axis of which coincides with the piston profile axis in the example according to FIGS. 1 and 2, is expediently designed in such a way that the squeezing bump indicated by arrows 5 arises during the compression stroke. Like Flg. 2, four rounded recesses 6, which become deeper towards the vortex trough, are arranged tangentially to the circular outer boundary of the vortex trough, which generate the rotational flow indicated by arrows 7. In Ausführungsboispiol according to Figures 3 and h is the fluidized pan 8 is formed of eight shape and each vortex zugeordnefc When half a tangentially extending pin 9. The Ouet vortex marked with 10 is superimposed by the Rotati onaströmung 3.1.

Claims (1)

PatentanspruchClaim Kolbenbodenausbildung bei Brennkraftmaschinen mit Wirbelwannenbrennraum, in dem durch Quetschwirkung zwischen Kolbenbodenrand und Zylinderkopf während des Verdichtungshubes eine Durchwirbelung des Frischgases erfolgt, dadurch gekennzeichnet, dass auf dem den Wirbelwannenbrennraum umgebenden Kolbenrand im wesentlichen tangential zur Aussenkontur der runden oder eines runden Teiles der Wirbelwanne vorlaufende, flache Kanäle (6, 9) angeordnet sind.Piston crown design in internal combustion engines with a vortex pan combustion chamber, in that by squeezing between the edge of the piston crown and cylinder head during the compression stroke, the fresh gas is swirled through, characterized in that that on the one surrounding the vortex furnace combustion chamber Piston edge essentially tangential to the outer contour of the round or a round part of the vortex trough leading, flat channels (6, 9) are arranged. 10 »β 16/0239 SAD 10 »β 16/0239 SAD
DE19681601968 1968-03-09 1968-03-09 Piston crown design in internal combustion engines with a vortex pan combustion chamber Pending DE1601968A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK0064984 1968-03-09

Publications (1)

Publication Number Publication Date
DE1601968A1 true DE1601968A1 (en) 1971-04-15

Family

ID=7231888

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19681601968 Pending DE1601968A1 (en) 1968-03-09 1968-03-09 Piston crown design in internal combustion engines with a vortex pan combustion chamber

Country Status (1)

Country Link
DE (1) DE1601968A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711681A1 (en) * 1976-11-15 1978-05-18 Toyota Motor Co Ltd COMBUSTION CHAMBER OF A COMBUSTION ENGINE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711681A1 (en) * 1976-11-15 1978-05-18 Toyota Motor Co Ltd COMBUSTION CHAMBER OF A COMBUSTION ENGINE

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