JPS5575530A - Piston for use in direct-injection type diesel engine - Google Patents

Piston for use in direct-injection type diesel engine

Info

Publication number
JPS5575530A
JPS5575530A JP15031678A JP15031678A JPS5575530A JP S5575530 A JPS5575530 A JP S5575530A JP 15031678 A JP15031678 A JP 15031678A JP 15031678 A JP15031678 A JP 15031678A JP S5575530 A JPS5575530 A JP S5575530A
Authority
JP
Japan
Prior art keywords
cavity
piston
diesel engine
fuel
direct
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
JP15031678A
Other languages
Japanese (ja)
Other versions
JPS599734B2 (en
Inventor
Nobuji Eguchi
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.)
Hino Motors Ltd
Original Assignee
Hino Motors 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 Hino Motors Ltd filed Critical Hino Motors Ltd
Priority to JP53150316A priority Critical patent/JPS599734B2/en
Publication of JPS5575530A publication Critical patent/JPS5575530A/en
Publication of JPS599734B2 publication Critical patent/JPS599734B2/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
    • F02B23/0678—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets
    • F02B23/0693—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets the combustion space consisting of step-wise widened multiple zones of different depth
    • 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
    • F02B23/0645—Details related to the fuel injector or the fuel spray
    • F02B23/0648—Means or methods to improve the spray dispersion, evaporation or ignition
    • F02B23/0651—Means or methods to improve the spray dispersion, evaporation or ignition the fuel spray impinging on reflecting surfaces or being specially guided throughout the combustion space
    • 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
    • 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
    • F02B23/0618—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 having in-cylinder means to influence the charge motion
    • F02B23/0624—Swirl flow
    • 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)
  • Dispersion Chemistry (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

PURPOSE: To cause combustion of mixture stepwise and to thereby minimize generation of Nox in a diesel engine, by forming at the top of piston a cavity consisting of a plurality of recesses whose inner diameter is reduced gradually.
CONSTITUTION: A cavity 2 is formed at the top of piston 1. This cavity 2 has three recesses 21W23, inner diameters of which are reduced toward the bottom of cavity 2, and a central projection 5 is formed on the bottom surface of recess 23. On the other hand, fuel injection nozzle 3 is fixed such that fuel ejected therefrom is directed toward shoulder portion 4 of recess 23. With such an arrangement, fuel is ejected downwardly into the cavity 2 in a swirling flow, and flame produced thereafter is propagated stepwise from downward to upward.
COPYRIGHT: (C)1980,JPO&Japio
JP53150316A 1978-12-05 1978-12-05 Direct injection diesel engine piston Expired JPS599734B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53150316A JPS599734B2 (en) 1978-12-05 1978-12-05 Direct injection diesel engine piston

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53150316A JPS599734B2 (en) 1978-12-05 1978-12-05 Direct injection diesel engine piston

Publications (2)

Publication Number Publication Date
JPS5575530A true JPS5575530A (en) 1980-06-06
JPS599734B2 JPS599734B2 (en) 1984-03-05

Family

ID=15494350

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53150316A Expired JPS599734B2 (en) 1978-12-05 1978-12-05 Direct injection diesel engine piston

Country Status (1)

Country Link
JP (1) JPS599734B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4522173A (en) * 1982-10-22 1985-06-11 Chenesseau Internal combustion engine usable with a high vaporization heat fuel
US5109816A (en) * 1990-04-27 1992-05-05 Toyota Jidosha Kabushiki Kaisha Direct fuel injection type spark ignition internal combustion engine
FR2947009A1 (en) * 2009-06-23 2010-12-24 Peugeot Citroen Automobiles Sa Piston for combustion chamber of diesel combustion engine of vehicle i.e. motor vehicle, has castor i.e. plane, inclined in direction of bottom of bowl from external edge towards lip so as to create air mixture zone
WO2014196423A1 (en) * 2013-06-06 2014-12-11 日野自動車株式会社 Combustion chamber structure of direct-injection diesel engine
JP2015105570A (en) * 2013-11-28 2015-06-08 株式会社豊田中央研究所 Diesel engine
CN105134370A (en) * 2015-07-23 2015-12-09 北京理工大学 Divided-swirl combustion system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4522173A (en) * 1982-10-22 1985-06-11 Chenesseau Internal combustion engine usable with a high vaporization heat fuel
US5109816A (en) * 1990-04-27 1992-05-05 Toyota Jidosha Kabushiki Kaisha Direct fuel injection type spark ignition internal combustion engine
FR2947009A1 (en) * 2009-06-23 2010-12-24 Peugeot Citroen Automobiles Sa Piston for combustion chamber of diesel combustion engine of vehicle i.e. motor vehicle, has castor i.e. plane, inclined in direction of bottom of bowl from external edge towards lip so as to create air mixture zone
WO2014196423A1 (en) * 2013-06-06 2014-12-11 日野自動車株式会社 Combustion chamber structure of direct-injection diesel engine
JP2015105570A (en) * 2013-11-28 2015-06-08 株式会社豊田中央研究所 Diesel engine
CN105134370A (en) * 2015-07-23 2015-12-09 北京理工大学 Divided-swirl combustion system

Also Published As

Publication number Publication date
JPS599734B2 (en) 1984-03-05

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