FR2144478A5 - Light metal pistons - with a bottom combustion chamber of improved metallurgy cal properties - Google Patents

Light metal pistons - with a bottom combustion chamber of improved metallurgy cal properties

Info

Publication number
FR2144478A5
FR2144478A5 FR7225980A FR7225980A FR2144478A5 FR 2144478 A5 FR2144478 A5 FR 2144478A5 FR 7225980 A FR7225980 A FR 7225980A FR 7225980 A FR7225980 A FR 7225980A FR 2144478 A5 FR2144478 A5 FR 2144478A5
Authority
FR
France
Prior art keywords
combustion chamber
light metal
metal pistons
bottom combustion
cal properties
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
Application number
FR7225980A
Other languages
French (fr)
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 FR7225980A priority Critical patent/FR2144478A5/en
Application granted granted Critical
Publication of FR2144478A5 publication Critical patent/FR2144478A5/en
Expired 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
    • 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
    • F02B23/0675—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 the combustion space being substantially spherical, hemispherical, ellipsoid or parabolic
    • 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
    • F02B23/0603—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 at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head
    • F02B2023/0612—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 at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head the material having a high temperature and pressure resistance, e.g. ceramic
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Laser Beam Processing (AREA)

Abstract

Process for mfr of light metal pistons with a bottom combustion chamber comprises starting with a rough shape which has a hole (I) constituting the combustion chamber which is radially diminished by a machining allowance (II). The area at the edge of (I) is refined by a charged beam heat, and two or more parallel welds are produced by remelting using a beam whose charge vibrates perpendicularly to its direction in a circle or ellipse. The final combustion chamber dimensions are produced by subsequently eliminating (II).
FR7225980A 1972-07-19 1972-07-19 Light metal pistons - with a bottom combustion chamber of improved metallurgy cal properties Expired FR2144478A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7225980A FR2144478A5 (en) 1972-07-19 1972-07-19 Light metal pistons - with a bottom combustion chamber of improved metallurgy cal properties

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7225980A FR2144478A5 (en) 1972-07-19 1972-07-19 Light metal pistons - with a bottom combustion chamber of improved metallurgy cal properties

Publications (1)

Publication Number Publication Date
FR2144478A5 true FR2144478A5 (en) 1973-02-09

Family

ID=9102049

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7225980A Expired FR2144478A5 (en) 1972-07-19 1972-07-19 Light metal pistons - with a bottom combustion chamber of improved metallurgy cal properties

Country Status (1)

Country Link
FR (1) FR2144478A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1104846A1 (en) * 1999-12-02 2001-06-06 Peugeot Citroen Automobiles Process for reinforcing a combustion engine piston and a reinforced piston according to such process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1104846A1 (en) * 1999-12-02 2001-06-06 Peugeot Citroen Automobiles Process for reinforcing a combustion engine piston and a reinforced piston according to such process
FR2801935A1 (en) * 1999-12-02 2001-06-08 Peugeot Citroen Automobiles Sa METHOD FOR REINFORCING A PISTON OF AN INTERNAL COMBUSTION ENGINE, AND PISTON REINFORCED ACCORDING TO THE METHOD

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Legal Events

Date Code Title Description
ST Notification of lapse