DE2058410A1 - Pistons for internal combustion engines - Google Patents

Pistons for internal combustion engines

Info

Publication number
DE2058410A1
DE2058410A1 DE19702058410 DE2058410A DE2058410A1 DE 2058410 A1 DE2058410 A1 DE 2058410A1 DE 19702058410 DE19702058410 DE 19702058410 DE 2058410 A DE2058410 A DE 2058410A DE 2058410 A1 DE2058410 A1 DE 2058410A1
Authority
DE
Germany
Prior art keywords
piston
pistons
internal combustion
coolant
combustion engines
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
DE19702058410
Other languages
German (de)
Inventor
Heinz Dipl-Ing Hoffmann
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Priority to DE19702058410 priority Critical patent/DE2058410A1/en
Priority to GB5361971A priority patent/GB1315737A/en
Priority to FR7142434A priority patent/FR2116093A5/fr
Priority to US00202530A priority patent/US3738335A/en
Publication of DE2058410A1 publication Critical patent/DE2058410A1/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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • 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
    • F02B23/0645—Details related to the fuel injector or the fuel spray
    • F02B23/0654—Thermal treatments, e.g. with heating elements or local cooling
    • 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

Daimler-Benz Aktiengesellschaft 2058410 Daim «705/4 Daimler-Benz Aktiengesellschaft 2058410 Daim «705/4

Stuttgart-Untertürkheim 20. Nov. 1970Stuttgart-Untertürkheim November 20, 1970

"Kolben für Brennkraftmaschinen""Pistons for Internal Combustion Engines"

Die Erfindung, bezieht sich auf einen Kolben für Brennkraftmaschinen mit einem im Kolbenkopf angeordneten ringförmigen Kühlraum, der mit einer Zuflu.Cbohrung und mit einer Abflußbohrung für das Kühlmittel verbunden ist, insbesondere bezieht sich die Erfindung auf einen Kolben mit einer exzentrisch angeordneten Brennraummulde, um die herum der Kühlraum gelegt ist.The invention relates to a piston for internal combustion engines with an annular cooling space arranged in the piston head, which is provided with an inflow hole and an outflow hole for the coolant Is connected, in particular, the invention relates to a piston with an eccentrically arranged combustion bowl to the around the refrigerator is placed.

In Kolben dieser Art sind die Kühlräume als geschlossene Ringe ausgebildet, bei denen die Anschlüsse für die Kühlmittelzufuhr und Kühlmittelabfuhr auf einem Durchmesser durch den Ring einander gegenüberliegen. Wenn ein solcher ringförmiger Kühlraum um eine B renn raum mulde heI1Um angeordnet ist, findet im allgemeinen eine mit Bezug auf den Umfang der Brennraummulde gleichmäßige Wärmeabfuhr durch das Kühlmittel statt. Für zentral angeordnete Brennraum mulden ist eine ringsum gleichmäßige Wärmeabfuhr durch das Kühlmittel durchaus erwünscht, nicht dagegen für Brennraum mulden, die exzentrisch zur Mittellängsachse durch den Kolben angeordnet sind, weil in diesem Falle auch dort gekühlt wird, wo es an sich nicht notwendig ist. Das sind die Bereiche des Kolbens, in denen die Brennraum mulde weiter weg vom Kolbenumfang liegt als in anderen Bereichen.In pistons of this type, the cooling spaces are designed as closed rings, in which the connections for the coolant supply and coolant discharge are opposite one another on a diameter through the ring. If such an annular cooling chamber a B race bowl Hei 1 To is disposed is generally uniform with respect to the circumference of the combustion bowl heat dissipation rather than by the coolant. For centrally arranged combustion chamber troughs, uniform heat dissipation through the coolant is absolutely desirable, but not for combustion chamber troughs that are arranged eccentrically to the central longitudinal axis through the piston, because in this case there is also cooling where it is not necessary. These are the areas of the piston in which the combustion chamber recess is further away from the circumference of the piston than in other areas.

Der Erfindung liegt die Aufgabe zugrunde, einen Kühlraum im Kolben derart auszubilden, daß bewußt nur dort gekühlt wird, wo eine KühlungThe invention is based on the object of a cooling space in the piston to be trained in such a way that it is only consciously cooled where there is cooling

209824/0301 -2-209824/0301 -2-

unbedingt nötig ist, und zwar mit noch möglichst kaltem Kühlmittel.is absolutely necessary, with the coolant still as cold as possible.

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daf der Kühlraum als offener King ausgebildet ist, an dessen einen Knde dio Zuflußbohrung, an dessen anderen Ende die Abflußbohrung angeschlossen ist.The object set is achieved according to the invention in that the Cold room is designed as an open King, at one customer dio Inflow bore, at the other end of which the drain bore is connected.

Durch die Erfindung gelingt auf einfache Weise eine gezielte Külilung derjenigen Kolbenbereiche, die eine zusätzliche Kühlung notwendig haben. Kolbenbereiche, aus denen Wärme an den Zylinder abgegeben werden kann, ohne daC zusätzliche Mittel angewendet werden müßten, bleiben außerhalb des Wirkungsbereiches des Kühlmittels. Dadurch können die zusätzlich zu kühlenden Kolbenbereiche mit verhältnismä; ig kühlen Kühlmittel beschickt werden. Ein zusätzlicher Vorteil ergibt sich bei der Kühlung von Kolben bei Brennkraftmaschinen in Zylinderreihen in V-Form, wo bei der einen Zylinderreihe gefährdete Kolbenbereiche und bei der anderen Zylinderreihe ungefährdete Kolbenbereiche an der Druckseite der Kolben liegen, also bei gleichen Kolben die Kühlanforderungen an beiden Zylinder reihen unterschiedlich sind, indem einfach die Funktionen der Zu- und Abflußbohrungen für das Kühlmittel von Zylinderreihe zu Zylinderreihe vertauscht werden. Ferner wird erreicht, daß innerhalb des Kühlraumes das Kühlmittel schneller fließt als wenn eine Aufteilung des Külilmittelstromes stattfinden würde.The invention enables targeted cooling to be achieved in a simple manner those piston areas that require additional cooling. Piston areas from which heat is given off to the cylinder can be used without the need to use additional funds, remain outside the effective range of the coolant. As a result, the piston areas to be additionally cooled can with relative; ig cool coolant can be charged. There is an additional benefit when cooling pistons in internal combustion engines in rows of cylinders in V-shape, where in one cylinder row endangered piston areas and in the case of the other cylinder bank, non-endangered piston areas are on the pressure side of the pistons, i.e. the cooling requirements for the same pistons on both cylinder rows are different, simply by the functions of the inlet and outlet bores for the coolant be swapped from cylinder bank to cylinder bank. It is also achieved that the coolant flows faster within the cooling space as if a division of the coolant flow would take place.

In der Zeichnung ist der Gegenstand der Erfindung in einem Ausführungsbeispiel dargestellt. Es zeigen In the drawing, the subject matter of the invention is shown in one embodiment. Show it

Fig. 1 eine Draufsicht auf einen Kolben undFig. 1 is a plan view of a piston and

209824/0301209824/0301

-3- 2058 A 1 Q Daim 8705/4 -3- 2058 A 1 Q Daim 8705/4

Fig. 2 einen Schnitt durch den Kolben nach der Linie II-II aus Fig. 1.FIG. 2 shows a section through the piston along the line II-II from FIG. 1.

Nach den Fig. 1 und 2 ist in einem Kolben 1 eine Brennraummuldo 2 angeordnet. Diese Brennraum mulde 2 ist rotationssymmetrisch ausgebildet. Ihre Mittellüngsachse 'Λ liegt außerhalb der Mittellängsaehsc 4 durch den Kolben 1. Zur Kühlung bevorzugter Knibenbereiche um die Brennraummulde 2 herum ist ein ringförmiger Kühlraum 5 im Kolbenkopf vorgesehen, der als offener lUng ausgebildet ist. An das eine Ende des einen offenen Tl ing bildenden Kühlrnumes 5 ist eine Zuflu!'bohrung 6 und an das andere j;nde eine AbfluPbohrung 7 angeschlossen. Die Funktion dieser beiden Bohrungen kann gegebenenfalls vertauscht werden.According to FIGS. 1 and 2, a combustion chamber hollow 2 is arranged in a piston 1. This combustion chamber trough 2 is designed to be rotationally symmetrical. Your central axis ' Λ lies outside the central longitudinal axis 4 through the piston 1. To cool preferred knee areas around the combustion bowl 2, an annular cooling chamber 5 is provided in the piston head, which is designed as an open length. An inlet hole 6 is connected to one end of the cooling chamber 5, which forms an open segment, and an outlet hole 7 is connected to the other end. The function of these two holes can be interchanged if necessary.

20982^/0301 ~4~20982 ^ / 0301 ~ 4 ~

BADBATH

Claims (1)

[ ^Anspruch[^ Claim Kolben für Brennkraftmaschinen mit einem im Kolbenkopf angeordneten ringförmigen Kühlraum, der mit einer Zuflußbohrung und mit einer Abflußbohrung für das Kühlmittel verbunden ist, insbesondere Kolben mit einer exzentrisch angeordneten Brennraummulde, um die herum der Kühlraum gelegt ist, dadurch gekennzeichnet, daß der Kühlraum (5) als offener Ring ausgebildet ist, an dessen eines Ende die Zuflußbohrung (6), an dessen anderes Ende die Abflußbohrung (7) angeschlossen ist.Pistons for internal combustion engines with one arranged in the piston head annular cooling space which is connected to an inflow bore and to an outflow bore for the coolant, in particular Piston with an eccentrically arranged combustion bowl, around which the cooling space is placed, characterized in that the cooling space (5) is designed as an open ring, at one end of which the inflow bore (6) is connected, at the other end of which the outflow bore (7) is connected is. 209824/0301209824/0301
DE19702058410 1970-11-27 1970-11-27 Pistons for internal combustion engines Pending DE2058410A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19702058410 DE2058410A1 (en) 1970-11-27 1970-11-27 Pistons for internal combustion engines
GB5361971A GB1315737A (en) 1970-11-27 1971-11-18 Pistons for internal combustion engines
FR7142434A FR2116093A5 (en) 1970-11-27 1971-11-26
US00202530A US3738335A (en) 1970-11-27 1971-11-26 Piston for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702058410 DE2058410A1 (en) 1970-11-27 1970-11-27 Pistons for internal combustion engines

Publications (1)

Publication Number Publication Date
DE2058410A1 true DE2058410A1 (en) 1972-06-08

Family

ID=5789285

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19702058410 Pending DE2058410A1 (en) 1970-11-27 1970-11-27 Pistons for internal combustion engines

Country Status (4)

Country Link
US (1) US3738335A (en)
DE (1) DE2058410A1 (en)
FR (1) FR2116093A5 (en)
GB (1) GB1315737A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19716702C2 (en) * 1996-04-22 2000-05-18 Unisia Jecs Corp Metallic mold arrangement for a reciprocating piston and reciprocating piston, in particular for internal combustion engines
US6722337B2 (en) 2001-04-25 2004-04-20 Jenbacher Aktiengesellschaft Spark ignition internal combustion engine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1118774B (en) * 1979-06-12 1986-03-03 Ass Eng Italia IMPROVEMENT RELATED TO MUFFLERS IN DIESEL ENGINES
GB8423050D0 (en) * 1984-09-12 1984-10-17 Ae Plc Pistons
DE19807176C2 (en) * 1998-02-20 2000-01-27 Federal Mogul Burscheid Gmbh Method for producing a piston for internal combustion engines
DE102004003658A1 (en) * 2004-01-24 2005-08-25 Mahle Gmbh Combustion basin in the bottom of a piston for a diesel engine
US7406941B2 (en) * 2004-07-21 2008-08-05 Federal - Mogul World Wide, Inc. One piece cast steel monobloc piston

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2622570A (en) * 1949-03-15 1952-12-23 Daimler Benz Ag Diesel engine with precombustion chamber
US2865348A (en) * 1955-03-23 1958-12-23 Schmidt Gmbh Karl Piston
DE1033954B (en) * 1955-08-18 1958-07-10 Maschf Augsburg Nuernberg Ag Cooled light alloy piston
FR1244830A (en) * 1959-02-03 1960-10-28 Mahle Kg Light metal piston with cooling channels and its manufacturing process
GB854804A (en) * 1959-02-20 1960-11-23 List Hans Improvements in and relating to internal combustion engines with air compression andself-ignition
DE1141494B (en) * 1960-03-19 1962-12-20 Karl Schmidt Ges Mit Beschraen Cooled piston for internal combustion engines, preferably made of light metal
CH404874A (en) * 1960-08-23 1965-12-31 Schmidt Gmbh Karl Method of making pistons

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19716702C2 (en) * 1996-04-22 2000-05-18 Unisia Jecs Corp Metallic mold arrangement for a reciprocating piston and reciprocating piston, in particular for internal combustion engines
US6722337B2 (en) 2001-04-25 2004-04-20 Jenbacher Aktiengesellschaft Spark ignition internal combustion engine

Also Published As

Publication number Publication date
US3738335A (en) 1973-06-12
FR2116093A5 (en) 1972-07-07
GB1315737A (en) 1973-05-02

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