US3805677A - Two-piece oil-cooled piston with thermal expansion control - Google Patents

Two-piece oil-cooled piston with thermal expansion control Download PDF

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Publication number
US3805677A
US3805677A US00230741A US23074172A US3805677A US 3805677 A US3805677 A US 3805677A US 00230741 A US00230741 A US 00230741A US 23074172 A US23074172 A US 23074172A US 3805677 A US3805677 A US 3805677A
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US
United States
Prior art keywords
bridge member
skirt
defining portion
piston
crown
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
Application number
US00230741A
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English (en)
Inventor
H Clary
H Skopin
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.)
Northrop Grumman Space and Mission Systems Corp
Original Assignee
TRW Inc
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 TRW Inc filed Critical TRW Inc
Priority to US00230741A priority Critical patent/US3805677A/en
Priority to CA154,248A priority patent/CA961357A/en
Priority to GB4871472A priority patent/GB1352290A/en
Priority to AU48310/72A priority patent/AU464577B2/en
Priority to DE19722253961 priority patent/DE2253961B2/de
Priority to IT31594/72A priority patent/IT970445B/it
Priority to JP47119047A priority patent/JPS526406B2/ja
Priority to BR008492/72A priority patent/BR7208492D0/pt
Priority to FR7244036A priority patent/FR2174482A5/fr
Application granted granted Critical
Publication of US3805677A publication Critical patent/US3805677A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • F01M2001/086—Lubricating systems characterised by the provision therein of lubricant jetting means for lubricating gudgeon pins
    • 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
    • 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
    • F05C2251/00—Material properties
    • F05C2251/04—Thermal properties
    • F05C2251/042—Expansivity

Definitions

  • ABSTRACT A multi-piece piston assembly including a skirt defining portion and a head defining portion which interfit to provide wrist pin bores in registry for receiving a wrist pin, the skirt defining and head defining portions being composed of a metal having good thermal conductivity such as an aluminum alloy, together with a bridge member which is anchored in the skirt defining portion in the region of the thrust faces to provide thermal expansion control at the top of the skirt portion and to provide additional mechanical strength.
  • the present invention relates to a piston assembly composed of a skirt defining portion which has opposed thrust faces and a separate head defining portion including a crown, a ring belt and grooves therein for receiving piston rings, the skirt defining portion and the head defining portion being disposed in interfitting relationship to define a wrist pin bore extending through both the skirt defining and the head defining portions.
  • a bridge or strut member has its ends anchored in the opposed thrust faces and has a medial portion in confronting relation to the under side of the crown, the bridge member having a coefficient of thermal expansion less than that of the skirt defining portion.
  • the marginal edges of the medial portion of the bridge member are spaced from the interior of the crown portion, and one or more apertures are provided in the bridge member to permit oil to come into contact with view being taken looking through the wrist pin bore; and
  • FIG. 2 is a cross sectional view taken in a plane 90 from the view of FIG. 1.
  • the head defining portion 10 and the skirt defining portion ll are preferably composed of a lightweight, heat transmitting metal such as an aluminum alloy.
  • the head defining portion 10 includes a recessed crown portion 12 having a conical portion l3'centrally thereof as is common with some types of heavy duty pistons.
  • the head defining portion 10 includes a ring belt area 14 into which piston ring receiving grooves 15 and 16 are provided in the usual manner.
  • the uppermost piston ring may be received in a groove 17 provided in a ring groove reinforcement 18 composed of cast iron or the like.
  • such piston ring groove reinforcements may be received within a circumferential groove 19 in tight mechanical engagement, with the junction between the reinforcement 18 and the groove being substantially devoid of metallurgical bonding.
  • the reinforcement ring 18 may also include non-planar opposed faces including raised portions thereon and having an area to weight ratio of at least square inches of ring in contact with the piston per pound of ring, thereby reducing the temperature differential between the reinforcement l8 and the piston in service.
  • the crown portion of the piston head has an upwardly bowed underside indicated at reference numeral 20 in the drawings. It also has a depending portion 21 formed.
  • the skirt forming portion 11 includes a skirt 23 and a wrist pin bore 24 which is coaxial with the wrist bore 22 of the head forming portion when the head forming portion and the wrist forming portion are placed in interfitting engagement as shown in FIGS. 1 and 2.
  • Grooves 25 and 26 are provided in the wrist pin bore 24 for receiving the locking rings (not shown) of the wrist pin assembly itself.
  • a circumferential groove 27 is provided between the head forming portion 10 and the skirt forming portion 11, together with a space 29 to accommodate relative movement between the two parts.
  • a port 30 is provided to provide escape for oil wiped off the cylinder wall by the piston rings, the oil finding its way to the engine oil sump through the clearance provided between the two parts of the piston.
  • a bridge or strut member 31 having an upwardly bowed medial portion 32 along which are formed a pair of upwardly extending flange portions 33 and 34 as best seen in FIG. 2.
  • the bridge member 31 is composed of steel or other material having a coefficient of thermal expansion lower than the aluminum alloy of which the head and skirt forming portions are formed.
  • the extreme ends of the bridge member 31 may be provided with fingers or tabs 35 to facilitate anchoring the ends of the bridge member 31 in the metal through which a partial wrist pin bore 22 is of the skirt forming portion 11, in the vicinity of the thrust faces'36 and 37.
  • the fingers 35 are held in position by having the front of the skirt cast around them.
  • the bridge member 31 is also provided with one or more apertures 38 so that upon each downstroke of the piston, oil enters a cooling chamber 39 provided between the top of the bridge member 31 and the underside of the crown portion of the piston. On each downstroke of the piston, oil enters the chamber 39 and is thrown against the underside20 of the piston head. On each upstroke of the piston, the oil, which has absorbed heat from the piston crown escapes through the spaces 40 existing between the upturned medial flange portions 33 and 34 and the confronting side wall of the piston head.
  • the bridge member 31 with its lower rate of thermal expansion than the aluminum piston body restricts the amount of thermal expansion of the aluminum piston skirt.
  • the reduced skirt clearance thus provided reduces the noise generated when the top of the skirt contacts alternate sides of the cylinder bore when the side thrust loads reverse direction.
  • the reduced skirt clearance also reduces the .rate of cavitation erosion which occurs on the'outer diameter of wet cylinder liners of the type used in heavy duty engines.
  • the bridge member 31 also provides additional strength at the top of the skirt to enableit to carry the side thrust loads encountered in mounted engines without excessive deflection orfailure.
  • the head forming portion and the skirt forming portion are retained in their proper working positions with respect to each other by the wrist pin and the cylinder bore, but each element is free to rotate about the wrist pin to the extent permitted by the clearance between the cylinder bore and the outside diameters of each of the elements.
  • the presence of the bridge member further provides the strength required to resist the side thrust loads and provides thermal expansion control at the top of the skirt while also providing additional strength.
  • a two-piece metal piston assembly comprising a skirt defining portion having opposed thrust faces thereon, a separate head defining portion-having a crown and depending wrist pin bosses and having grooves for receiving piston rings, said skirt defining portion and said head defining portion being aligned to provide a wrist pin bore extending through said portions, and a metal bridge member having its ends anchored in said opposed thrust faces, said bridge member having a coefficient of thermal expansion less than that of said skirt defining portion, said bridge member having a large surface area and having oil-retaining upturned marginal edges facing said crown and being in closely spaced relation to the crown and to the inner, opposing faces of the wrist pin bosses, the space between the bridge member and the underside of the crown defining a cooling chamber, said bridge member having an aperture therein permitting entry of oil into said cooling chamber upon the downward stroke of said piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
US00230741A 1972-03-01 1972-03-01 Two-piece oil-cooled piston with thermal expansion control Expired - Lifetime US3805677A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US00230741A US3805677A (en) 1972-03-01 1972-03-01 Two-piece oil-cooled piston with thermal expansion control
CA154,248A CA961357A (en) 1972-03-01 1972-10-18 Two-piece oil-cooled piston with thermal expansion control
GB4871472A GB1352290A (en) 1972-03-01 1972-10-23 Multi-piece pistons
AU48310/72A AU464577B2 (en) 1972-03-01 1972-10-30 Two-piece oil-cooled piston with thermal expansion control
DE19722253961 DE2253961B2 (de) 1972-03-01 1972-11-03 Zweiteiliger metallkolben fuer brennkraftmaschinen
IT31594/72A IT970445B (it) 1972-03-01 1972-11-13 Pistone in due pezzi raffreddato con olio con controllo della dila tazione termica
JP47119047A JPS526406B2 (enrdf_load_stackoverflow) 1972-03-01 1972-11-29
BR008492/72A BR7208492D0 (pt) 1972-03-01 1972-12-01 Pistao de duas pecas resfriado a oleo e com dilatacao termica
FR7244036A FR2174482A5 (enrdf_load_stackoverflow) 1972-03-01 1972-12-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00230741A US3805677A (en) 1972-03-01 1972-03-01 Two-piece oil-cooled piston with thermal expansion control

Publications (1)

Publication Number Publication Date
US3805677A true US3805677A (en) 1974-04-23

Family

ID=22866378

Family Applications (1)

Application Number Title Priority Date Filing Date
US00230741A Expired - Lifetime US3805677A (en) 1972-03-01 1972-03-01 Two-piece oil-cooled piston with thermal expansion control

Country Status (9)

Country Link
US (1) US3805677A (enrdf_load_stackoverflow)
JP (1) JPS526406B2 (enrdf_load_stackoverflow)
AU (1) AU464577B2 (enrdf_load_stackoverflow)
BR (1) BR7208492D0 (enrdf_load_stackoverflow)
CA (1) CA961357A (enrdf_load_stackoverflow)
DE (1) DE2253961B2 (enrdf_load_stackoverflow)
FR (1) FR2174482A5 (enrdf_load_stackoverflow)
GB (1) GB1352290A (enrdf_load_stackoverflow)
IT (1) IT970445B (enrdf_load_stackoverflow)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4180027A (en) * 1977-07-20 1979-12-25 Mack Trucks, Inc. Two-piece oil-cooled piston
US4207808A (en) * 1977-04-21 1980-06-17 Elsbett G Piston for reciprocating internal combustion engines, typically diesel engines
US4377967A (en) * 1981-03-27 1983-03-29 Mack Trucks, Inc. Two-piece piston assembly
US4505233A (en) * 1984-01-24 1985-03-19 Toyota Jidosha Kabushiki Kaisha Piston assembly with cooling lubricant reservoir defining member with a deep narrow reservoir and a shallow wide reservoir
US4506632A (en) * 1983-07-28 1985-03-26 Toyota Jidosha Kabushiki Kaisha Piston assembly with cooling lubricant reservoir defining member engaged to piston pin mounting bosses
US4508019A (en) * 1982-03-29 1985-04-02 Deere & Company Reduced impact piston assembly
US4986167A (en) * 1989-05-25 1991-01-22 Caterpillar Inc. Articulated piston with a cooling recess having a preestablished volume therein
US5052280A (en) * 1986-12-17 1991-10-01 Mahle Gmbh Coolable trunk piston for internal combustion engines
US5113817A (en) * 1990-05-08 1992-05-19 Mahle, Gmbh Piston with specific land characteristics
US5868112A (en) * 1996-12-19 1999-02-09 Cummins Engine Company, Inc. Deep angle injection nozzle and piston having complementary combustion bowl
US6371061B2 (en) * 2000-03-28 2002-04-16 Federal-Mogul World Wide, Inc. Heavy duty piston having oil splash deflector and method of cooling a piston
US6453797B1 (en) * 1998-10-09 2002-09-24 Mahle Gmbh Piston for an internal combustion engine
US6499387B2 (en) 2001-03-06 2002-12-31 Federal-Mogul World Wide, Inc. Unified multi-piece piston and method of manufacture
WO2003036059A1 (en) * 2001-10-23 2003-05-01 Federal-Mogul Corporation Closed gallery monobloc piston having oil drainage groove
US6732703B2 (en) 2002-06-11 2004-05-11 Cummins Inc. Internal combustion engine producing low emissions
US20060070603A1 (en) * 2002-06-11 2006-04-06 Cummins Inc. Internal combustion engine producing low emissions
WO2006056315A1 (de) * 2004-11-26 2006-06-01 Fev Motorentechnik Gmbh Leichtbaukolben für thermisch hochbelastete kolben
US20080202330A1 (en) * 2004-12-22 2008-08-28 Ks Kolbenschmidt Gmbh Rotor Recess With Scupper Slots and Free Casting
US20090205604A1 (en) * 2008-02-19 2009-08-20 Sadowski Michael S Coolable piston for internal combustion engine
US20100263620A1 (en) * 2008-02-19 2010-10-21 Sadowski Michael S Coolable piston for internal combustion engine
US20100275873A1 (en) * 2004-09-29 2010-11-04 Ks Kolbenschmidt Gmbh Simple frictional weld
WO2012078093A1 (en) * 2010-12-09 2012-06-14 Peter Nyberg High temperature piston
CN101087942B (zh) * 2004-12-10 2012-11-28 马勒国际公司 用于内燃机的活塞及为其销孔涂敷涂层的方法
US20130276740A1 (en) * 2012-04-24 2013-10-24 Industrial Parts Depot, Llc Two-piece friction-welded piston
US8677970B2 (en) 2011-03-17 2014-03-25 Cummins Intellectual Property, Inc. Piston for internal combustion engine
US9797337B2 (en) 2015-07-10 2017-10-24 Mahle International Gmbh Oil-cooled piston for an internal combustion engine
US11162453B2 (en) 2016-05-04 2021-11-02 Ks Kolbenschmidt Gmbh Piston

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR7806090A (pt) * 1978-09-15 1980-03-25 Metal Leve Sa Ind Com Pistao com saia independente
JPS6090876U (ja) * 1983-11-25 1985-06-21 日本電気ホームエレクトロニクス株式会社 パネル取付構造
DE3516308A1 (de) * 1985-05-07 1986-11-13 Daimler-Benz Ag, 7000 Stuttgart Kolben fuer eine brennkraftmaschine
DE3540085A1 (de) * 1985-11-12 1987-05-14 Alcan Aluminiumwerke Kolben fuer brennkraftmaschinen
BR9001916A (pt) * 1990-04-20 1991-11-12 Metal Leve Sa Processo de obtencao de embolo refrigerado e embolo refrigerado

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1548329A (en) * 1923-06-02 1925-08-04 Adolph L Nelson Piston
US1745860A (en) * 1927-06-17 1930-02-04 Noble Warren Piston
US1929831A (en) * 1931-06-05 1933-10-10 Perfect Circle Co Composite piston
US2110346A (en) * 1934-07-31 1938-03-08 Perfect Circle Co Piston
US2180521A (en) * 1937-12-08 1939-11-21 Harley Davidson Motor Co Inc Piston
US2240967A (en) * 1940-03-11 1941-05-06 Sterling Corp Piston

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1548329A (en) * 1923-06-02 1925-08-04 Adolph L Nelson Piston
US1745860A (en) * 1927-06-17 1930-02-04 Noble Warren Piston
US1929831A (en) * 1931-06-05 1933-10-10 Perfect Circle Co Composite piston
US2110346A (en) * 1934-07-31 1938-03-08 Perfect Circle Co Piston
US2180521A (en) * 1937-12-08 1939-11-21 Harley Davidson Motor Co Inc Piston
US2240967A (en) * 1940-03-11 1941-05-06 Sterling Corp Piston

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4207808A (en) * 1977-04-21 1980-06-17 Elsbett G Piston for reciprocating internal combustion engines, typically diesel engines
US4180027A (en) * 1977-07-20 1979-12-25 Mack Trucks, Inc. Two-piece oil-cooled piston
US4377967A (en) * 1981-03-27 1983-03-29 Mack Trucks, Inc. Two-piece piston assembly
US4508019A (en) * 1982-03-29 1985-04-02 Deere & Company Reduced impact piston assembly
US4506632A (en) * 1983-07-28 1985-03-26 Toyota Jidosha Kabushiki Kaisha Piston assembly with cooling lubricant reservoir defining member engaged to piston pin mounting bosses
US4505233A (en) * 1984-01-24 1985-03-19 Toyota Jidosha Kabushiki Kaisha Piston assembly with cooling lubricant reservoir defining member with a deep narrow reservoir and a shallow wide reservoir
US5052280A (en) * 1986-12-17 1991-10-01 Mahle Gmbh Coolable trunk piston for internal combustion engines
US4986167A (en) * 1989-05-25 1991-01-22 Caterpillar Inc. Articulated piston with a cooling recess having a preestablished volume therein
US5113817A (en) * 1990-05-08 1992-05-19 Mahle, Gmbh Piston with specific land characteristics
US5868112A (en) * 1996-12-19 1999-02-09 Cummins Engine Company, Inc. Deep angle injection nozzle and piston having complementary combustion bowl
US6453797B1 (en) * 1998-10-09 2002-09-24 Mahle Gmbh Piston for an internal combustion engine
US6371061B2 (en) * 2000-03-28 2002-04-16 Federal-Mogul World Wide, Inc. Heavy duty piston having oil splash deflector and method of cooling a piston
US6499387B2 (en) 2001-03-06 2002-12-31 Federal-Mogul World Wide, Inc. Unified multi-piece piston and method of manufacture
CN1296618C (zh) * 2001-10-23 2007-01-24 联邦莫沃尔公司 具有泄油槽的封闭室整体活塞
US6557514B1 (en) * 2001-10-23 2003-05-06 Federal-Mogul World Wide, Inc. Closed gallery monobloc piston having oil drainage groove
WO2003036059A1 (en) * 2001-10-23 2003-05-01 Federal-Mogul Corporation Closed gallery monobloc piston having oil drainage groove
US7210448B2 (en) 2002-06-11 2007-05-01 Cummins, Inc. Internal combustion engine producing low emissions
US6732703B2 (en) 2002-06-11 2004-05-11 Cummins Inc. Internal combustion engine producing low emissions
US20040182358A1 (en) * 2002-06-11 2004-09-23 Cummins Inc. Internal combustion engine producing low emissions
US6966294B2 (en) 2002-06-11 2005-11-22 Cummins Inc. Internal combustion engine producing low emissions
US20060070603A1 (en) * 2002-06-11 2006-04-06 Cummins Inc. Internal combustion engine producing low emissions
US20100275873A1 (en) * 2004-09-29 2010-11-04 Ks Kolbenschmidt Gmbh Simple frictional weld
US10066579B2 (en) 2004-09-29 2018-09-04 Ks Kolbenschmidt Gmbh Simple friction weld
US7895936B2 (en) * 2004-11-26 2011-03-01 Advanced Propulsion Technologies, Inc. Piston with a lightweight construction that is subjected to high thermal stress
US20080134879A1 (en) * 2004-11-26 2008-06-12 Fev Motorentechnik Gmbh Piston With A Lightweight Construction That Is Subjected To High Thermal Stress
WO2006056315A1 (de) * 2004-11-26 2006-06-01 Fev Motorentechnik Gmbh Leichtbaukolben für thermisch hochbelastete kolben
CN101087942B (zh) * 2004-12-10 2012-11-28 马勒国际公司 用于内燃机的活塞及为其销孔涂敷涂层的方法
US20080202330A1 (en) * 2004-12-22 2008-08-28 Ks Kolbenschmidt Gmbh Rotor Recess With Scupper Slots and Free Casting
US7730828B2 (en) * 2004-12-22 2010-06-08 Ks Kolbenschmidt Gmbh Rotor recess with scupper slots and free casting
US8347842B2 (en) 2008-02-19 2013-01-08 Federal-Mogul Corporation Coolable piston for internal combustion engine
US20100263620A1 (en) * 2008-02-19 2010-10-21 Sadowski Michael S Coolable piston for internal combustion engine
US7762227B2 (en) 2008-02-19 2010-07-27 Federal Mogul Corporation Coolable piston for internal combustion engine
US20090205604A1 (en) * 2008-02-19 2009-08-20 Sadowski Michael S Coolable piston for internal combustion engine
WO2012078093A1 (en) * 2010-12-09 2012-06-14 Peter Nyberg High temperature piston
CN103403331A (zh) * 2010-12-09 2013-11-20 彼得·尼贝格 高温活塞
US8978612B2 (en) 2010-12-09 2015-03-17 Peter Nyberg High temperature piston
CN103403331B (zh) * 2010-12-09 2016-04-27 彼得·尼贝格 高温活塞
USRE46806E1 (en) 2011-03-17 2018-04-24 Cummins Intellectual Property, Inc. Piston for internal combustion engine
US8677970B2 (en) 2011-03-17 2014-03-25 Cummins Intellectual Property, Inc. Piston for internal combustion engine
US20130276740A1 (en) * 2012-04-24 2013-10-24 Industrial Parts Depot, Llc Two-piece friction-welded piston
US9216474B2 (en) * 2012-04-24 2015-12-22 Industrial Parts Depot, Llc Two-piece friction-welded piston
US9797337B2 (en) 2015-07-10 2017-10-24 Mahle International Gmbh Oil-cooled piston for an internal combustion engine
US11162453B2 (en) 2016-05-04 2021-11-02 Ks Kolbenschmidt Gmbh Piston

Also Published As

Publication number Publication date
JPS526406B2 (enrdf_load_stackoverflow) 1977-02-22
AU464577B2 (en) 1975-08-28
CA961357A (en) 1975-01-21
IT970445B (it) 1974-04-10
GB1352290A (en) 1974-05-08
DE2253961A1 (de) 1973-09-13
JPS4899513A (enrdf_load_stackoverflow) 1973-12-17
FR2174482A5 (enrdf_load_stackoverflow) 1973-10-12
AU4831072A (en) 1974-05-02
BR7208492D0 (pt) 1973-12-13
DE2253961B2 (de) 1977-08-11

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