JPS57203847A - Piston for direct injection type diesel-engine - Google Patents

Piston for direct injection type diesel-engine

Info

Publication number
JPS57203847A
JPS57203847A JP8938081A JP8938081A JPS57203847A JP S57203847 A JPS57203847 A JP S57203847A JP 8938081 A JP8938081 A JP 8938081A JP 8938081 A JP8938081 A JP 8938081A JP S57203847 A JPS57203847 A JP S57203847A
Authority
JP
Japan
Prior art keywords
combustion chamber
piston
engine
cavity combustion
heat
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.)
Pending
Application number
JP8938081A
Other languages
Japanese (ja)
Inventor
Yukio Matsui
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP8938081A priority Critical patent/JPS57203847A/en
Publication of JPS57203847A publication Critical patent/JPS57203847A/en
Pending 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 
    • F02F3/10—Pistons  having surface coverings
    • F02F3/12—Pistons  having surface coverings on piston heads
    • F02F3/14—Pistons  having surface coverings on piston heads within combustion chambers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

PURPOSE:To prevent heat transmission from a combustion chamber to a piston by a method wherein a cavity combustion chamber structure consisting of a low heat conductive material is incorporated with the top of the piston, in the titled piston having the cavity combustion chamber at the top thereof. CONSTITUTION:The cavity combustion chamber structure 11, forming the combustion chamber 14, is constituted so as to be burried into the top of the main frame of the piston 2, in the diesel engine in which fuel is injected from an injection nozzle 7 into the cavity combustion chamber 14 and ignited immediate1y before the upper dead point of the compression thereof. This structure 11 is formed by a material such as cast iron, ceramic or the like having the heat conductivity lower than the same of the main frame of the piston 2 and a flange section 16 is extended to the outside of the peripheral side wall 12 thereof to make it rigid. According to this construction, high-temperature flame self-ignited in the cavity combustion chamber 14 is enclosed by the peripheral side wall 12 and a bottom wall 13, therefore, the heat loss thereof may be reduced, the heat efficiency may be improved and HC, CO or the like in the exhaust gas of the engine may be reduced.
JP8938081A 1981-06-10 1981-06-10 Piston for direct injection type diesel-engine Pending JPS57203847A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8938081A JPS57203847A (en) 1981-06-10 1981-06-10 Piston for direct injection type diesel-engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8938081A JPS57203847A (en) 1981-06-10 1981-06-10 Piston for direct injection type diesel-engine

Publications (1)

Publication Number Publication Date
JPS57203847A true JPS57203847A (en) 1982-12-14

Family

ID=13969063

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8938081A Pending JPS57203847A (en) 1981-06-10 1981-06-10 Piston for direct injection type diesel-engine

Country Status (1)

Country Link
JP (1) JPS57203847A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5991448U (en) * 1982-12-11 1984-06-21 株式会社豊田中央研究所 insulated piston
JPS59194064A (en) * 1983-02-04 1984-11-02 エ−イ−・ピ−エルシ− Reinforcement of crown part of piston comprising aluminum and aluminum alloy
US4494501A (en) * 1981-07-31 1985-01-22 Ae Plc Pistons with combustion bowl inserts
JP2015169192A (en) * 2014-03-11 2015-09-28 日産自動車株式会社 Piston for internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494501A (en) * 1981-07-31 1985-01-22 Ae Plc Pistons with combustion bowl inserts
JPS5991448U (en) * 1982-12-11 1984-06-21 株式会社豊田中央研究所 insulated piston
JPS59194064A (en) * 1983-02-04 1984-11-02 エ−イ−・ピ−エルシ− Reinforcement of crown part of piston comprising aluminum and aluminum alloy
JP2015169192A (en) * 2014-03-11 2015-09-28 日産自動車株式会社 Piston for internal combustion engine

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