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WO2008146066A3 - Piston, internal combustion engine equipped with such a piston, automotive vehicle including such an engine and use of some materials to build such a system - Google Patents

Piston, internal combustion engine equipped with such a piston, automotive vehicle including such an engine and use of some materials to build such a system Download PDF

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Publication number
WO2008146066A3
WO2008146066A3 PCT/IB2006/004068 IB2006004068W WO2008146066A3 WO 2008146066 A3 WO2008146066 A3 WO 2008146066A3 IB 2006004068 W IB2006004068 W IB 2006004068W WO 2008146066 A3 WO2008146066 A3 WO 2008146066A3
Authority
WO
WIPO (PCT)
Prior art keywords
piston
front wall
engine
internal combustion
build
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
PCT/IB2006/004068
Other languages
French (fr)
Other versions
WO2008146066A2 (en
Inventor
Benoit Lombard
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.)
Renault Trucks SAS
Original Assignee
Renault Trucks SAS
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 Renault Trucks SAS filed Critical Renault Trucks SAS
Priority to PCT/IB2006/004068 priority Critical patent/WO2008146066A2/en
Publication of WO2008146066A2 publication Critical patent/WO2008146066A2/en
Publication of WO2008146066A3 publication Critical patent/WO2008146066A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • F02B75/00—Other engines
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/044—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of an adjustable piston length
    • 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
    • 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
    • F05C2251/046—Expansivity dissimilar

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)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

A piston (4) is designed for use in an internal combustion engine (1) provided with at least a cylinder (2) adapted to receive said piston with a possibility of bi-directional translation (A1). The piston comprises a base portion, adapted to be connected to a crankshaft (5), and a front wall (44), adapted to define a part of a combustion chamber within the cylinder of an engine. The front wall (44) is made of a metallic material and has a first predetermined configuration, when its temperature is within a first range, and a second predetermined configuration, when its temperature is within a second range. The overall shape of the front wall (44) is substantially different in these two configurations, so that the compression ratio of the engine changes according to the temperature of the front wall (44). The front wall (44) can be made of a shape memory alloy or a bi-metallic strip.
PCT/IB2006/004068 2006-11-27 2006-11-27 Piston, internal combustion engine equipped with such a piston, automotive vehicle including such an engine and use of some materials to build such a system Ceased WO2008146066A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2006/004068 WO2008146066A2 (en) 2006-11-27 2006-11-27 Piston, internal combustion engine equipped with such a piston, automotive vehicle including such an engine and use of some materials to build such a system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2006/004068 WO2008146066A2 (en) 2006-11-27 2006-11-27 Piston, internal combustion engine equipped with such a piston, automotive vehicle including such an engine and use of some materials to build such a system

Publications (2)

Publication Number Publication Date
WO2008146066A2 WO2008146066A2 (en) 2008-12-04
WO2008146066A3 true WO2008146066A3 (en) 2009-01-29

Family

ID=39937599

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/004068 Ceased WO2008146066A2 (en) 2006-11-27 2006-11-27 Piston, internal combustion engine equipped with such a piston, automotive vehicle including such an engine and use of some materials to build such a system

Country Status (1)

Country Link
WO (1) WO2008146066A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2964156B1 (en) * 2010-08-31 2012-08-17 Peugeot Citroen Automobiles Sa INTERNAL COMBUSTION ENGINE PISTON
DE102010041103A1 (en) * 2010-09-21 2012-03-22 Bayerische Motoren Werke Aktiengesellschaft Piston for lifting cylinder combustion engine, has bistable spring board formed at large extent at round face portion of piston head, where bistable spring board deforms inward to concave shape towards piston
CN102121507B (en) * 2011-03-18 2012-06-27 杭州电子科技大学 Energy consumption shock absorber
CN114341477A (en) * 2019-05-15 2022-04-12 清焰发动机公司 Cold starting for high octane fuels in diesel engine architectures

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2022905A (en) * 1934-05-25 1935-12-03 Herbert B Trix Thermostatic piston
DE3612842A1 (en) * 1986-04-16 1987-10-22 Bayerische Motoren Werke Ag Internal combustion engine, especially reciprocating piston internal combustion engine, with compression space adjustable in operation
SU1698471A1 (en) * 1990-02-26 1991-12-15 Брянский Институт Транспортного Машиностроения Piston of engine
JP2006125225A (en) * 2004-10-26 2006-05-18 Toyota Motor Corp Internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2022905A (en) * 1934-05-25 1935-12-03 Herbert B Trix Thermostatic piston
DE3612842A1 (en) * 1986-04-16 1987-10-22 Bayerische Motoren Werke Ag Internal combustion engine, especially reciprocating piston internal combustion engine, with compression space adjustable in operation
SU1698471A1 (en) * 1990-02-26 1991-12-15 Брянский Институт Транспортного Машиностроения Piston of engine
JP2006125225A (en) * 2004-10-26 2006-05-18 Toyota Motor Corp Internal combustion engine

Also Published As

Publication number Publication date
WO2008146066A2 (en) 2008-12-04

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