US3877351A - Internal combustion engine piston - Google Patents

Internal combustion engine piston Download PDF

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Publication number
US3877351A
US3877351A US372642A US37264273A US3877351A US 3877351 A US3877351 A US 3877351A US 372642 A US372642 A US 372642A US 37264273 A US37264273 A US 37264273A US 3877351 A US3877351 A US 3877351A
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United States
Prior art keywords
piston
ring
annular ribs
combustion engine
internal combustion
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.)
Expired - Lifetime
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US372642A
Inventor
Eugen Barfiss
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Mahle GmbH
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Mahle GmbH
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Filing date
Publication date
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Publication of US3877351A publication Critical patent/US3877351A/en
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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 
    • F02F3/0015—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
    • 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
    • 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
    • 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
    • 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
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Definitions

  • the invention relates to an internal combustion engine piston, particularly for diesel engines, with a bottom part consisting preferably of light metal providing the piston skirt and the gudgeon pin mounting, and, connected separably thereto, a preferably steel upper part comprising the piston crown and the ring zone, the upper part being supported by two concentric annular ribs standing out from the inside of the piston crown.
  • the invention is based on the problem of finding a construction inwhich both the annular ribs projecting from the inside face of the piston crown are rigidly bolted, but in which the lower part nevertheless has to accommodate but few screwed anchorings.
  • this problem is resolved in that between the lower part and the upper part there is an intermediate ring consisting preferably of castiron and of bifurcated cross-section, the base part of which is bolted to the lower part of the piston while its two form parts are bolted to the annular ribs projecting from the inside face of the piston crown.
  • FIG. I is a partial longitudinal section on the line I-I in FIG. 2 through a piston according to the invention.
  • FIG. 2 is a partial cross-section through the piston, on the line II-II in FIG. 1
  • the lower part consisting of an aluminium alloy, is generally designated 1 while the upper parts, made from steel, is identified by reference numeral 2. It consists of the ring zone 3 and a piston crown 4, from the inside face of which projects two concentric annular ribs 5, 6. Through the lower part 1 pass strong screws 7, the ends 8 of which are screwed into the base part 9 of a cross-sectionally bifurcated intermediate ring 10 made from cast-iron.
  • the fork parts 11, 12 of the bifurcated intermediate ring 10 are bolted to the annular ribs 5, 6 which project from the piston crown 4 by means of expanding screws 13, 14 which pass through tubes 15, 16 formed on the fork parts ll, 12.
  • the cavity 17 formed by the bifurcated intermediate ring 10 and the annular ribs 5, 6 is connected to the coolant circuit by transfer ports l8, 19.
  • An internal combustion engine piston including a lightweight metal lower part comprising the piston skirt, a piston crown connected with the piston skirt and comprising the upper part of the piston, which piston crown is formed from steel, two concentric integral annular ribs projecting from the inside face of the piston crown, a piston ring zone surrounding the piston crown, a cross-sectionally Y-shaped bifurcated annular intermediate ring of cast iron located between the upper and lower piston part, said ring including fork parts mating with said annular ribs respectively and a base part mating with said lower piston part, at least one tube formed on each fork part of the ring, an expanding screw provided in each tube for bolting the two fork parts of said intermediate ring to the annular ribs, and further screws in a single circular arrangement located in the piston skirt and connected to said base part for bolting the base part of the intermediate ring to the lower part of the piston.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

Internal combustion engine piston, particularly for diesel engines, with a bottom part and a top part which is connected separately thereto by means of an intermediate ring having a forked cross-section.

Description

Unte 1:: States atent 1 1 3,877,351
Barfiss 1 1 Apr. 15, 1975 INTERNAL COMBUSTION ENGINE PISTON 3,385,175 5/1968 Meier et a1. 92/220 X [75] Inventor: Eugen Barfiss, Stuttgart, Germany 3 A G FOREIGN PATENTS OR APPLICATIONS [7 1 Mame Stuttgart Germany 416,900 7 1925 Germany 123 4135 [22] Filed; June 22, 1973 487,377 6/1938 United Kingdom l23/41.35
[21] Appl. No.: 372,642
Primary Examiner-lrwin C. Cohen [30] Foreign Application Priority Data Attorney, Agent, or Firm-William Anthony Drucker June 23, 1972 Germany 2230722 [52] U.S. C1. 92/220; 92/186; 92/216 57 ABSTRACT [51] Int. Cl F16j 1/00 Field of Search 186, 216, Internal combustion engine piston, particularly for 123/4135 diesel engines, with a bottom part and a top part which is connected separately thereto by means of an [5 References Cited intermediate ring having a forked cross-section.
UNITED STATES PATENTS 2,266,192 12/1941 Grieshaber 92/220 X 1 Claim, 2 Drawing Figures l l 1 Y 1 111 1 11 111 2 a i l I 4 70 l a v (g l I 1 (/1 I 1 zqfil X;
\6; \9 1 \K r x INTERNAL COMBUSTION ENGINE PISTON BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to an internal combustion engine piston, particularly for diesel engines, with a bottom part consisting preferably of light metal providing the piston skirt and the gudgeon pin mounting, and, connected separably thereto, a preferably steel upper part comprising the piston crown and the ring zone, the upper part being supported by two concentric annular ribs standing out from the inside of the piston crown.
2. Description of the Prior Art Such a piston is illustrated in the Motortechnische Zeitung, 31st Year, No. 10, October 1970, on p.415 (FIG. 3). With this construction, connection of the bottom part to the top part is effected by a centrally disposed screw bolt and by expanding bolts which pass through the outer annular ribs and are anchored in the lower part. The inner annular rib is braced on the lower part but is not bolted thereto. Therefore it is capable of additionally supporting the piston crown which is loaded by the gas forces and of transmitting these forces to the lower part. However, the inner annular rib can contribute nothing towards preventing the outwards arching of the piston crown which is observed under heavy loading and which originates from the'uneven temperatureand wall thickness conditions.
It would be obvious, then, also to bolt the inner annular rib to the lower part. On the other hand, it must be remembered that the preferably light metal lower part would then be weakened by additional bores. In fact, a high-strength screw connection between a light metal member and a steel part already presents so many problems that it becomes desirable to minimise the number of connecting elements although spreading the stresses over a plurality of connecting elements is ac knowledged to be very favourable.
SUMMARY OF THE INVENTION The invention is based on the problem of finding a construction inwhich both the annular ribs projecting from the inside face of the piston crown are rigidly bolted, but in which the lower part nevertheless has to accommodate but few screwed anchorings.
According to the invention, this problem is resolved in that between the lower part and the upper part there is an intermediate ring consisting preferably of castiron and of bifurcated cross-section, the base part of which is bolted to the lower part of the piston while its two form parts are bolted to the annular ribs projecting from the inside face of the piston crown.
By reason of the construction according to the invention, the bolting of both annular ribs is made possible by a plurality of favourably distributed screw elements without the lower parts becoming weakened by additional bores. Furthermore, for connection of the upper part to the intermediate ring, it is possible to use short slender screws so that the two annular ribs can remain narrow.
BRIEF DESCRIPTION OF THE DRAWING An example of the embodiment of the object of the invention is illustrated in the attached drawings, in which:
FIG. I is a partial longitudinal section on the line I-I in FIG. 2 through a piston according to the invention, and
FIG. 2 is a partial cross-section through the piston, on the line II-II in FIG. 1
DESCRIPTION OF THE PREFERRED EMBODIMENT The lower part, consisting of an aluminium alloy, is generally designated 1 while the upper parts, made from steel, is identified by reference numeral 2. It consists of the ring zone 3 and a piston crown 4, from the inside face of which projects two concentric annular ribs 5, 6. Through the lower part 1 pass strong screws 7, the ends 8 of which are screwed into the base part 9 of a cross-sectionally bifurcated intermediate ring 10 made from cast-iron. The fork parts 11, 12 of the bifurcated intermediate ring 10 are bolted to the annular ribs 5, 6 which project from the piston crown 4 by means of expanding screws 13, 14 which pass through tubes 15, 16 formed on the fork parts ll, 12. The cavity 17 formed by the bifurcated intermediate ring 10 and the annular ribs 5, 6 is connected to the coolant circuit by transfer ports l8, 19.
I- claim:
1. An internal combustion engine piston including a lightweight metal lower part comprising the piston skirt, a piston crown connected with the piston skirt and comprising the upper part of the piston, which piston crown is formed from steel, two concentric integral annular ribs projecting from the inside face of the piston crown, a piston ring zone surrounding the piston crown, a cross-sectionally Y-shaped bifurcated annular intermediate ring of cast iron located between the upper and lower piston part, said ring including fork parts mating with said annular ribs respectively and a base part mating with said lower piston part, at least one tube formed on each fork part of the ring, an expanding screw provided in each tube for bolting the two fork parts of said intermediate ring to the annular ribs, and further screws in a single circular arrangement located in the piston skirt and connected to said base part for bolting the base part of the intermediate ring to the lower part of the piston.

Claims (1)

1. An internal combustion engine piston including a lightweight metal lower part comprising the piston skirt, a piston crown connected with the piston skirt and comprising the upper part of the piston, which piston crown is formed from steel, two concentric integral annular ribs projecting from the inside face of the piston crown, a piston ring zone surrounding the piston crown, a cross-sectionally Y-shaped bifurcated annular intermediate ring of cast iron located between the upper and lower piston part, said ring including fork parts mating with said annular ribs respectively and a base part mating with said lower piston part, at least one tube formed on each fork part of the ring, an expanding screw provided in each tube for bolting the two fork parts of said intermediate ring to the annular ribs, and further screws in a single circular arrangement located in the piston skirt and connected to said base part for bolting the base part of the intermediate ring to the lower part of the piston.
US372642A 1972-06-23 1973-06-22 Internal combustion engine piston Expired - Lifetime US3877351A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2230722A DE2230722C3 (en) 1972-06-23 1972-06-23 Internal combustion engine pistons, in particular for diesel engines, with a lower part and an upper part detachably connected to this

Publications (1)

Publication Number Publication Date
US3877351A true US3877351A (en) 1975-04-15

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ID=5848565

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US372642A Expired - Lifetime US3877351A (en) 1972-06-23 1973-06-22 Internal combustion engine piston

Country Status (7)

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US (1) US3877351A (en)
JP (1) JPS5633574B2 (en)
CH (1) CH556469A (en)
DE (1) DE2230722C3 (en)
FR (1) FR2190164A5 (en)
GB (1) GB1374059A (en)
IT (1) IT989676B (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044731A (en) * 1975-03-08 1977-08-30 Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft (M.A.N.) Composite piston with protection of the fastening screws against corrosion by a coolant
US4056044A (en) * 1975-11-12 1977-11-01 Caterpillar Tractor Co. Oil cooled piston
US4083292A (en) * 1976-06-16 1978-04-11 Caterpillar Tractor Co. Piston with high top ring location
US4114519A (en) * 1975-10-08 1978-09-19 Wellworthy Limited Pistons
EP0007661A1 (en) * 1978-07-27 1980-02-06 KOLBENSCHMIDT Aktiengesellschaft Assembled internal combustion engine piston having liquid cooling means
US4727795A (en) * 1983-10-29 1988-03-01 Ae Plc Pistons
US6112642A (en) * 1998-10-06 2000-09-05 Caterpillar Inc. Method and apparatus for making a two piece unitary piston
US6155157A (en) * 1998-10-06 2000-12-05 Caterpillar Inc. Method and apparatus for making a two piece unitary piston
EP1061249A2 (en) 1999-06-17 2000-12-20 Caterpillar Inc. Method and apparatus for making a two piece unitary piston
US6477941B1 (en) 1999-10-08 2002-11-12 Federal-Mogul World Wide, Inc. Dual gallery piston
WO2007031109A1 (en) * 2005-09-17 2007-03-22 Ks Kolbenschmidt Gmbh Piston, especially cooling channel piston, of an internal combustion engine, comprising three friction-welded zones
US20080229923A1 (en) * 2005-09-17 2008-09-25 Ks Kolbenschmidt Gmbh Piston, Especially Cooling Channel Piston, Comprising Three Friction-Welded Zones
US20080245229A1 (en) * 2005-09-08 2008-10-09 Ks-Kolbenschmidt Gmbh Piston for an Internal Combustion Engine
US20090241769A1 (en) * 2006-07-07 2009-10-01 Ks Kolbenschmidt Gmbh Cooling channel piston for an internal combustion engine and method for the production thereof
US20100299922A1 (en) * 2006-01-21 2010-12-02 Ks Kolbenschmidt Gmbh Cooling duct piston for an internal combustion engine
US11162453B2 (en) 2016-05-04 2021-11-02 Ks Kolbenschmidt Gmbh Piston
US11519358B2 (en) * 2020-11-05 2022-12-06 Industrial Parts Depot, Llc Tri-weld piston

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2357569C2 (en) * 1973-11-17 1982-12-23 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Pistons for reciprocating internal combustion engines
DE2730071A1 (en) * 1977-07-02 1979-01-04 Maschf Augsburg Nuernberg Ag MULTI-PIECE PISTON FOR COMBUSTION MACHINERY
JPS62204174A (en) * 1986-03-04 1987-09-08 Hitachi Electronics Eng Co Ltd Rotating magnetic field type magnetic anisotropy sensor
DE19721013A1 (en) * 1997-05-20 1998-12-03 Mahle Gmbh Bolt arrangement with the piston built

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2266192A (en) * 1939-07-10 1941-12-16 Nordberg Manufacturing Co Wrist pin construction
US3385175A (en) * 1966-06-15 1968-05-28 Mahle Kg Piston

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB487377A (en) * 1938-02-25 1938-06-20 Fried Krupp Germaniawerft Ag Improvements in cooled working pistons, more particularly intended for compressorless internal combustion engines
DE1526598A1 (en) * 1966-10-07 1970-02-12 Maschf Augsburg Nuernberg Ag Device for reducing cylinder liner wear in plunger engines, especially for heavy duty operation
GB1306082A (en) * 1969-04-30 1973-02-07

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2266192A (en) * 1939-07-10 1941-12-16 Nordberg Manufacturing Co Wrist pin construction
US3385175A (en) * 1966-06-15 1968-05-28 Mahle Kg Piston

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044731A (en) * 1975-03-08 1977-08-30 Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft (M.A.N.) Composite piston with protection of the fastening screws against corrosion by a coolant
US4114519A (en) * 1975-10-08 1978-09-19 Wellworthy Limited Pistons
US4056044A (en) * 1975-11-12 1977-11-01 Caterpillar Tractor Co. Oil cooled piston
US4083292A (en) * 1976-06-16 1978-04-11 Caterpillar Tractor Co. Piston with high top ring location
EP0007661A1 (en) * 1978-07-27 1980-02-06 KOLBENSCHMIDT Aktiengesellschaft Assembled internal combustion engine piston having liquid cooling means
US4727795A (en) * 1983-10-29 1988-03-01 Ae Plc Pistons
US6112642A (en) * 1998-10-06 2000-09-05 Caterpillar Inc. Method and apparatus for making a two piece unitary piston
US6155157A (en) * 1998-10-06 2000-12-05 Caterpillar Inc. Method and apparatus for making a two piece unitary piston
EP1061249A2 (en) 1999-06-17 2000-12-20 Caterpillar Inc. Method and apparatus for making a two piece unitary piston
US6651549B2 (en) 1999-10-08 2003-11-25 Federal-Mogul World Wide, Inc. Dual gallery piston
US6477941B1 (en) 1999-10-08 2002-11-12 Federal-Mogul World Wide, Inc. Dual gallery piston
US20080245229A1 (en) * 2005-09-08 2008-10-09 Ks-Kolbenschmidt Gmbh Piston for an Internal Combustion Engine
US8683913B2 (en) 2005-09-08 2014-04-01 Ks Kolbenschmidt Gmbh Piston for an internal combustion engine
WO2007031109A1 (en) * 2005-09-17 2007-03-22 Ks Kolbenschmidt Gmbh Piston, especially cooling channel piston, of an internal combustion engine, comprising three friction-welded zones
US20080229923A1 (en) * 2005-09-17 2008-09-25 Ks Kolbenschmidt Gmbh Piston, Especially Cooling Channel Piston, Comprising Three Friction-Welded Zones
US20080245231A1 (en) * 2005-09-17 2008-10-09 Ks Kolbenschmidt Gmbh Piston, Especially Cooling Channel Piston, of an Internal Combustion Engine, Comprising Three Friction Welded Zones
US8011288B2 (en) 2005-09-17 2011-09-06 Ks Kolbenschmidt Gmbh Piston, especially cooling channel piston, comprising three friction-welded zones
US20100299922A1 (en) * 2006-01-21 2010-12-02 Ks Kolbenschmidt Gmbh Cooling duct piston for an internal combustion engine
US20090241769A1 (en) * 2006-07-07 2009-10-01 Ks Kolbenschmidt Gmbh Cooling channel piston for an internal combustion engine and method for the production thereof
US8485088B2 (en) 2006-07-07 2013-07-16 Ks Kolbenschmidt Gmbh Cooling channel piston for an internal combustion engine and method for the production thereof
US11162453B2 (en) 2016-05-04 2021-11-02 Ks Kolbenschmidt Gmbh Piston
US11519358B2 (en) * 2020-11-05 2022-12-06 Industrial Parts Depot, Llc Tri-weld piston

Also Published As

Publication number Publication date
JPS4950313A (en) 1974-05-16
JPS5633574B2 (en) 1981-08-04
GB1374059A (en) 1974-11-13
DE2230722C3 (en) 1981-12-24
CH556469A (en) 1974-11-29
IT989676B (en) 1975-06-10
DE2230722B2 (en) 1976-11-25
DE2230722A1 (en) 1974-01-17
FR2190164A5 (en) 1974-01-25

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