EP1264979A3 - Piston unit for combustion engine - Google Patents

Piston unit for combustion engine Download PDF

Info

Publication number
EP1264979A3
EP1264979A3 EP02253880A EP02253880A EP1264979A3 EP 1264979 A3 EP1264979 A3 EP 1264979A3 EP 02253880 A EP02253880 A EP 02253880A EP 02253880 A EP02253880 A EP 02253880A EP 1264979 A3 EP1264979 A3 EP 1264979A3
Authority
EP
European Patent Office
Prior art keywords
upper section
skirt
sealing arrangement
combustion engine
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.)
Granted
Application number
EP02253880A
Other languages
German (de)
French (fr)
Other versions
EP1264979A2 (en
EP1264979B1 (en
Inventor
Hannu Nurmi
Carl-Erik Rösgren
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.)
Wartsila Finland Oy
Original Assignee
Wartsila Finland Oy
Wartsila Technology Oy AB
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 Wartsila Finland Oy, Wartsila Technology Oy AB filed Critical Wartsila Finland Oy
Publication of EP1264979A2 publication Critical patent/EP1264979A2/en
Publication of EP1264979A3 publication Critical patent/EP1264979A3/en
Application granted granted Critical
Publication of EP1264979B1 publication Critical patent/EP1264979B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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

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)
  • Apparatus For Radiation Diagnosis (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

Piston assembly (1) for an internal combustion engine comprising an upper section (2) abutting onto the combustion chamber of the cylinder, a piston skirt (3) in connection with the upper section, and a sealing arrangement for sealing the joint between the upper section and the skirt. In the piston assembly the sealing arrangement (1.2, 1.3) between the upper section and the skirt is provided by utilizing the difference between the mounting and working temperatures of the upper section (2) and the piston skirt (3). Preferably, the sealing arrangement between the upper section and the skirt is arranged to operate under working pressure and the sealing arrangement comprises several operationally in succession provided counter surfaces, which are arranged with respect to each other so that their mutual distance is reduced at the working temperature of the surfaces, and that a pressure balancing chamber is formed between two successive, tightly arranged counter surface pairs (2a - 3b).
EP02253880A 2001-06-04 2002-05-31 Piston unit for combustion engine Expired - Lifetime EP1264979B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20011165 2001-06-04
FI20011165A FI113683B (en) 2001-06-04 2001-06-04 Internal combustion piston unit

Publications (3)

Publication Number Publication Date
EP1264979A2 EP1264979A2 (en) 2002-12-11
EP1264979A3 true EP1264979A3 (en) 2003-07-30
EP1264979B1 EP1264979B1 (en) 2007-02-28

Family

ID=8561331

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02253880A Expired - Lifetime EP1264979B1 (en) 2001-06-04 2002-05-31 Piston unit for combustion engine

Country Status (4)

Country Link
EP (1) EP1264979B1 (en)
AT (1) ATE355450T1 (en)
DE (1) DE60218382T2 (en)
FI (1) FI113683B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006015587A1 (en) * 2006-04-04 2007-10-11 Mahle International Gmbh Top part of a built-up piston

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253430A (en) * 1979-01-11 1981-03-03 General Motors Corporation Insulated oil cooled piston assembly
DE3110292A1 (en) * 1981-03-17 1982-09-30 Rudolf Dr. 6800 Mannheim Wieser Piston for internal combustion engine
US4419925A (en) * 1978-06-15 1983-12-13 Toyota Jidosha Kogyo Kabushiki Kaisha Assembled piston for engine
US4887518A (en) * 1984-12-05 1989-12-19 Ngk Insulators, Ltd. Internal combustion engine piston with threaded ceramic piston head
US5499572A (en) * 1993-08-26 1996-03-19 Cobble; Daniel L. Bi-tech piston

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4419925A (en) * 1978-06-15 1983-12-13 Toyota Jidosha Kogyo Kabushiki Kaisha Assembled piston for engine
US4253430A (en) * 1979-01-11 1981-03-03 General Motors Corporation Insulated oil cooled piston assembly
DE3110292A1 (en) * 1981-03-17 1982-09-30 Rudolf Dr. 6800 Mannheim Wieser Piston for internal combustion engine
US4887518A (en) * 1984-12-05 1989-12-19 Ngk Insulators, Ltd. Internal combustion engine piston with threaded ceramic piston head
US5499572A (en) * 1993-08-26 1996-03-19 Cobble; Daniel L. Bi-tech piston

Also Published As

Publication number Publication date
ATE355450T1 (en) 2006-03-15
FI20011165A (en) 2002-12-05
EP1264979A2 (en) 2002-12-11
DE60218382T2 (en) 2007-11-22
FI113683B (en) 2004-05-31
FI20011165A0 (en) 2001-06-04
DE60218382D1 (en) 2007-04-12
EP1264979B1 (en) 2007-02-28

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