DE4416120A1 - Two or more part IC engine piston held together by three bolts - Google Patents

Two or more part IC engine piston held together by three bolts

Info

Publication number
DE4416120A1
DE4416120A1 DE4416120A DE4416120A DE4416120A1 DE 4416120 A1 DE4416120 A1 DE 4416120A1 DE 4416120 A DE4416120 A DE 4416120A DE 4416120 A DE4416120 A DE 4416120A DE 4416120 A1 DE4416120 A1 DE 4416120A1
Authority
DE
Germany
Prior art keywords
piston
bolts
screws
screw
held together
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
DE4416120A
Other languages
German (de)
Inventor
Holger Franz
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.)
Mahle GmbH
Original Assignee
Mahle 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 Mahle GmbH filed Critical Mahle GmbH
Priority to DE4416120A priority Critical patent/DE4416120A1/en
Publication of DE4416120A1 publication Critical patent/DE4416120A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
    • F16J1/006—Pistons; Trunk pistons; Plungers obtained by assembling several pieces of different materials
    • 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
    • F02B23/0696—W-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder wall
    • 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 
    • F02F3/0015—Multi-part pistons
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • 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

Abstract

The piston has two or more parts made from iron based of aluminium based alloys. The upper part (1) is joined to the other (5) or others by three bolts (2,3,4). The plane of the connection of the bolts lies parallel or almost parallel to the direction of piston force.The middle bolt is central wrt. the piston. The deformations of the inner seating surfaces of the upper part are restrained. The close contact of all the seating surfaces is maintained without adverse effect on the bolt tensions. The flow of force within the piston is undisturbed by the connection.

Description

Die Erfindung betrifft einen zwei- oder mehrteiligen Kolben nach dem Oberbegriff des Patentanspruchs. Ein derartiger Kolben ist z. B. aus DE 34 26 238 A1 bekannt.The invention relates to a two-part or multi-part piston according to the preamble of the claim. Such one Piston is e.g. B. known from DE 34 26 238 A1.

Dort sind Oberteil und Unterteil über zwei in Druck-Gegen­ druck-Richtung angeordnete Schrauben miteinander verbunden. Nachteil der Ausführung mit zwei Befestigungsschrauben ist es, daß sich die innere Auflagefläche des Oberteils unter Temperatur und Massenkraft stark verformt und partiell in Bolzenrichtung nicht mehr am Unterteil anliegt. Dadurch wird die Schraube und die Innenauflage von Oberteil und Un­ terteil höher beansprucht.There are top and bottom parts over two in a pressure counter screws arranged in the direction of pressure. The disadvantage of the version with two fastening screws is it that the inner bearing surface of the upper part under Temperature and mass force strongly deformed and partially in Pin direction no longer lies on the lower part. Thereby the screw and the inner support of the upper part and Un higher stressed.

Bei nicht zu großen Durchmessern können Oberteil und Unter­ teil von gebauten Kolben auch nur eine einzige, zentrale Verschraubung aufweisen. Nachteil der Zentralverschraubung ist es, daß bei einem Abbau der Schraubenvorspannung durch außergewöhnliche Betriebsbedingungen, z. B. hartes Anlaufen des Feuersteges, das Bauteil insgesamt versagt.If the diameters are not too large, the top and bottom can be used part of built pistons even a single, central one Have screw connection. Disadvantage of the central screw connection it is that when the screw preload is removed by exceptional operating conditions, e.g. B. hard start of the top land, the component as a whole fails.

Bei gebauten Kolben mit Zentralverschraubung ist es erfor­ derlich, den Dehnschaft der Schraube wegen der hohen Schraubenvorspannkraft dick zu gestalten. Dadurch ist bei der heute üblichen niedrigen Bauweise aus Platzgründen die günstige Auslegung von Dehnschrauben von 1/d < 5 nicht ein­ zuhalten. Die Zentralverschraubung hat zudem eine geringe Sicherheit gegen Lösen, da infolge der steilen Kraft-Weg- Kennlinie die Verformung unter der Schraubenvorspannkraft gering ist.It is required for built pistons with central screw connection the stretch shaft of the screw because of the high To make the screw preload thick. This means that the low construction that is common today for reasons of space favorable dimensioning of expansion screws of 1 / d <5 does not to keep. The central screw connection also has a low one Safety against loosening, as the steep force-displacement  Characteristic curve the deformation under the bolt preload is low.

Weiterhin ist aus der Praxis auch eine Vielzahl von Kon­ struktionen mit vier oder mehr am Umfang verteilten Schrau­ ben bekannt.Furthermore, a large number of con structures with four or more screws distributed around the circumference ben known.

Die Verteilung mehrerer Befestigungsschrauben am Umfang stößt jedoch häufig auf Probleme, teilweise aus Platzgrün­ den, teilweise, weil die Anordnung im Bereich des Kraft­ flusses z. B. der Nabenbohrung belastungsbegrenzend für das gesamte Bauteil wirkt. Außerdem stellt jede zusätzliche Verschraubung auch einen Kostenfaktor dar.The distribution of several fastening screws on the circumference However, it often encounters problems, partly due to green spaces the, partly because of the arrangement in the area of the force river z. B. the hub bore load limiting for entire component works. It also provides any additional Bolting is also a cost factor.

Der Erfindung liegt deshalb das Problem zugrunde, eine Schraubenanordnung für gebaute Kolben zu finden, die starke Verformungen der Innenauflage verhindert, in jedem Be­ triebszustand Kontakt zumindest der gesamten inneren Aufla­ gefläche zwischen Oberteil und Unterteil gewährleistet und einen ungestörten Kraftfluß im Bereich der Nabenbohrun­ gen ermöglicht.The invention is therefore based on the problem of a Find screw assembly for built pistons that are strong Deformation of the inner pad is prevented in every loading drive state contact at least the entire inner surface surface between upper part and lower part guaranteed and  an undisturbed flow of power in the area of the hub bore gene enables.

Gelöst wird diese Aufgabe durch eine Anordnung der Schraub­ verbindungen nach dem kennzeichnenden Merkmal des Hauptan­ spruchs.This task is solved by arranging the screw connections according to the characteristic feature of the main an saying.

Durch die erfindungsgemäße Ausbildung der Schraubverbindung entsteht eine verformungssteife Konstruktion, die insbeson­ dere im Bereich der inneren Auflageflächen deutliche Vor­ teile gegenüber bekannten Konstruktionen aufweist. Durch die Anzahl der Schrauben wird eine optimale Schraubenausle­ gung selbst bei niedriger Bauweise und große Sicherheit ge­ gen Versagen der Schraubenverbindung erzielt.Through the inventive design of the screw connection the result is a rigid construction, in particular in the area of the inner contact surfaces parts compared to known constructions. By the number of screws becomes an optimal screw compensation even with a low construction and great security against screw connection failure.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnun­ gen dargestellt.An embodiment of the invention is in the drawings shown.

Es zeigenShow it

Fig. 1 einen Querschnitt des Kolbens, Fig. 1 shows a cross section of the piston,

Fig. 2 einen Schnitt auf Höhe der Nabenbohrung nach Linie II-II. Fig. 2 shows a section at the level of the hub bore along line II-II.

Ein Kolbenboden 1 ist über Dehnschrauben 2, 3 und 4 mit ei­ nem Kolbenunterteil 5 verbunden. Die Schrauben sind in Druck-Gegendruck-Richtung angeordnet. Schraube 3 liegt auf der Mittelachse des Kolbens.A piston crown 1 is connected via expansion screws 2 , 3 and 4 to a lower piston part 5 . The screws are arranged in the pressure-counter pressure direction. Screw 3 lies on the central axis of the piston.

Die Krafteinleitung der Schrauben ins Kolbenunterteil 5 er­ folgt über Druckstücke 6.The force of the screws in the lower piston part 5 it follows via pressure pieces 6 .

Der Kolben weist eine innere Auflagefläche 7 und eine äuße­ re Auflagefläche 8 zwischen Ober- und und Unterteil auf.The piston has an inner bearing surface 7 and an outer bearing surface 8 between the upper and lower parts.

Im Bereich der äußeren Auflagefläche 8 liegt ein geringes axiales Spiel von ca. 0,1 mm zwischen Ober- und Unterteil vor, so daß dort im unbelasteten Zustand keine Anlage er­ folgt. Im Bereich der inneren Auflagefläche wird durch die Ausgestaltung mit drei Dehnschrauben eine gegen Verformun­ gen widerstandsfähige Verbindung geschaffen.In the area of the outer bearing surface 8, there is a slight axial play of approximately 0.1 mm between the upper and lower part, so that there is no system in the unloaded state. In the area of the inner contact surface, the configuration with three expansion screws creates a connection that is resistant to deformation.

Claims (1)

Zwei- oder mehrteiliger Kolben mit einem Oberteil aus einem Eisenbasiswerkstoff und einem Unterteil aus einem Alumini­ umbasiswerkstoff oder einem Eisenbasiswerkstoff, wobei das Oberteil an dem Unterteil mit Schraubverbindungen befestigt ist, dadurch gekennzeichnet, daß die Befestigung mit drei Schrauben (2, 3, 4) erfolgt, wo­ bei die gedachte Verbindungslinie zwischen den drei Schrau­ ben (2, 3, 4) parallel oder nahezu parallel zur Druck-Gegen­ druck-Richtung verläuft und die mittlere Schraube (3) zen­ tral in der Kolbenachse angeordnet ist.Two-part or multi-part piston with an upper part made of an iron-based material and a lower part made of an aluminum-based material or an iron-based material, the upper part being fastened to the lower part with screw connections, characterized in that the fastening is carried out with three screws ( 2 , 3 , 4 ) , where the imaginary connecting line between the three screws ben ( 2 , 3 , 4 ) runs parallel or almost parallel to the pressure-counter pressure direction and the central screw ( 3 ) is arranged centrally in the piston axis.
DE4416120A 1994-05-06 1994-05-06 Two or more part IC engine piston held together by three bolts Ceased DE4416120A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4416120A DE4416120A1 (en) 1994-05-06 1994-05-06 Two or more part IC engine piston held together by three bolts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4416120A DE4416120A1 (en) 1994-05-06 1994-05-06 Two or more part IC engine piston held together by three bolts

Publications (1)

Publication Number Publication Date
DE4416120A1 true DE4416120A1 (en) 1995-11-09

Family

ID=6517541

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4416120A Ceased DE4416120A1 (en) 1994-05-06 1994-05-06 Two or more part IC engine piston held together by three bolts

Country Status (1)

Country Link
DE (1) DE4416120A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998053193A1 (en) * 1997-05-20 1998-11-26 Mahle Gmbh Clamping device for a piston to be mounted
DE19902144A1 (en) * 1999-01-20 2000-07-27 Mahle Gmbh Piston composed of components welded or soldered to each other, with lower part of forged steel with shaft extension below boss
DE19910582A1 (en) * 1999-03-10 2000-09-28 Mahle Gmbh Built piston
DE10107425A1 (en) * 2001-02-16 2002-08-22 Mahle Gmbh Thread lock for built pistons
US8707853B1 (en) 2013-03-15 2014-04-29 S.P.M. Flow Control, Inc. Reciprocating pump assembly
USD726224S1 (en) 2013-03-15 2015-04-07 S.P.M. Flow Control, Inc. Plunger pump thru rod
USD791193S1 (en) 2015-07-24 2017-07-04 S.P.M. Flow Control, Inc. Power end frame segment
USD791192S1 (en) 2014-07-25 2017-07-04 S.P.M. Flow Control, Inc. Power end frame segment
DE102016202420A1 (en) 2016-02-17 2017-08-17 Hirschvogel Umformtechnik Gmbh Piston for internal combustion engine
US10316832B2 (en) 2014-06-27 2019-06-11 S.P.M. Flow Control, Inc. Pump drivetrain damper system and control systems and methods for same
US10352321B2 (en) 2014-12-22 2019-07-16 S.P.M. Flow Control, Inc. Reciprocating pump with dual circuit power end lubrication system
US10436766B1 (en) 2015-10-12 2019-10-08 S.P.M. Flow Control, Inc. Monitoring lubricant in hydraulic fracturing pump system

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051751A (en) * 1900-01-01
US1388552A (en) * 1921-08-23 High-speed piston
GB330812A (en) * 1929-07-29 1930-06-19 Edwin Arthur Phillips Improvements in engine pistons
US2084834A (en) * 1936-09-16 1937-06-22 George Q Britt Piston
US2234762A (en) * 1939-04-01 1941-03-11 John L Harrah Piston construction
DE969838C (en) * 1952-02-02 1958-07-24 Maybach Motorenbau G M B H Multi-part internal combustion engine piston
GB829971A (en) * 1957-11-07 1960-03-09 Ricardo & Co Engineers Internal combustion engines and pistons therefor
DD102789A1 (en) * 1972-05-25 1973-12-20
FR2545542A1 (en) * 1983-05-05 1984-11-09 Renault PISTON IN REFRACTORY MATERIALS, IN PARTICULAR FOR COMPRESSION-IGNITION ENGINES
DE3426238A1 (en) * 1984-07-17 1986-01-30 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen BUILT PISTON
SU1307072A1 (en) * 1985-12-13 1987-04-30 Всесоюзный Научно-Исследовательский Тепловозный Институт Piston for internal combustion engine
DE3808349A1 (en) * 1988-03-12 1989-09-21 Mahle Gmbh Two-part piston, particularly for internal combustion engines
SU1749519A2 (en) * 1990-11-23 1992-07-23 Производственное объединение "Волгодизельмаш" Connecting rod-piston group
DE4131275A1 (en) * 1991-09-20 1993-03-25 Mahle Gmbh Sectional fluid-cooled piston for I.C.- engine - has head accommodating piston rings connected by central screw arrangement to piston shaft

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051751A (en) * 1900-01-01
US1388552A (en) * 1921-08-23 High-speed piston
GB330812A (en) * 1929-07-29 1930-06-19 Edwin Arthur Phillips Improvements in engine pistons
US2084834A (en) * 1936-09-16 1937-06-22 George Q Britt Piston
US2234762A (en) * 1939-04-01 1941-03-11 John L Harrah Piston construction
DE969838C (en) * 1952-02-02 1958-07-24 Maybach Motorenbau G M B H Multi-part internal combustion engine piston
GB829971A (en) * 1957-11-07 1960-03-09 Ricardo & Co Engineers Internal combustion engines and pistons therefor
DD102789A1 (en) * 1972-05-25 1973-12-20
FR2545542A1 (en) * 1983-05-05 1984-11-09 Renault PISTON IN REFRACTORY MATERIALS, IN PARTICULAR FOR COMPRESSION-IGNITION ENGINES
DE3426238A1 (en) * 1984-07-17 1986-01-30 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen BUILT PISTON
SU1307072A1 (en) * 1985-12-13 1987-04-30 Всесоюзный Научно-Исследовательский Тепловозный Институт Piston for internal combustion engine
DE3808349A1 (en) * 1988-03-12 1989-09-21 Mahle Gmbh Two-part piston, particularly for internal combustion engines
SU1749519A2 (en) * 1990-11-23 1992-07-23 Производственное объединение "Волгодизельмаш" Connecting rod-piston group
DE4131275A1 (en) * 1991-09-20 1993-03-25 Mahle Gmbh Sectional fluid-cooled piston for I.C.- engine - has head accommodating piston rings connected by central screw arrangement to piston shaft

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998053193A1 (en) * 1997-05-20 1998-11-26 Mahle Gmbh Clamping device for a piston to be mounted
US6260473B1 (en) 1997-05-20 2001-07-17 Mahle Gmbh Clamping device for a piston to be mounted
US6467397B1 (en) 1999-01-20 2002-10-22 Mahle Gmbh Constructed piston or piston consisting of components that are welded or soldered together
DE19902144A1 (en) * 1999-01-20 2000-07-27 Mahle Gmbh Piston composed of components welded or soldered to each other, with lower part of forged steel with shaft extension below boss
DE19910582A1 (en) * 1999-03-10 2000-09-28 Mahle Gmbh Built piston
US6622613B1 (en) 1999-03-10 2003-09-23 Mahle Gmbh Multipiece piston
DE10107425A1 (en) * 2001-02-16 2002-08-22 Mahle Gmbh Thread lock for built pistons
USD726224S1 (en) 2013-03-15 2015-04-07 S.P.M. Flow Control, Inc. Plunger pump thru rod
US8707853B1 (en) 2013-03-15 2014-04-29 S.P.M. Flow Control, Inc. Reciprocating pump assembly
US9695812B2 (en) 2013-03-15 2017-07-04 S.P.M. Flow Control, Inc. Reciprocating pump assembly
US10316832B2 (en) 2014-06-27 2019-06-11 S.P.M. Flow Control, Inc. Pump drivetrain damper system and control systems and methods for same
US11181101B2 (en) 2014-06-27 2021-11-23 Spm Oil & Gas Inc. Pump drivetrain damper system and control systems and methods for same
US10520037B2 (en) 2014-07-25 2019-12-31 S.P.M. Flow Control, Inc. Support for reciprocating pump
US9879659B2 (en) 2014-07-25 2018-01-30 S.P.M. Flow Control, Inc. Support for reciprocating pump
US10087992B2 (en) 2014-07-25 2018-10-02 S.P.M. Flow Control, Inc. Bearing system for reciprocating pump and method of assembly
US10677244B2 (en) 2014-07-25 2020-06-09 S.P.M. Flow Control, Inc. System and method for reinforcing reciprocating pump
US10393182B2 (en) 2014-07-25 2019-08-27 S.P.M. Flow Control, Inc. Power end frame assembly for reciprocating pump
USD791192S1 (en) 2014-07-25 2017-07-04 S.P.M. Flow Control, Inc. Power end frame segment
US10352321B2 (en) 2014-12-22 2019-07-16 S.P.M. Flow Control, Inc. Reciprocating pump with dual circuit power end lubrication system
USD791193S1 (en) 2015-07-24 2017-07-04 S.P.M. Flow Control, Inc. Power end frame segment
USD870156S1 (en) 2015-07-24 2019-12-17 S.P.M. Flow Control, Inc. Power end frame segment
USD870157S1 (en) 2015-07-24 2019-12-17 S.P.M. Flow Control, Inc. Power end frame segment
US10436766B1 (en) 2015-10-12 2019-10-08 S.P.M. Flow Control, Inc. Monitoring lubricant in hydraulic fracturing pump system
DE102016202420A1 (en) 2016-02-17 2017-08-17 Hirschvogel Umformtechnik Gmbh Piston for internal combustion engine

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