WO2023072429A8 - Piston for an internal combustion chamber provided with a piston bowl - Google Patents

Piston for an internal combustion chamber provided with a piston bowl Download PDF

Info

Publication number
WO2023072429A8
WO2023072429A8 PCT/EP2022/025482 EP2022025482W WO2023072429A8 WO 2023072429 A8 WO2023072429 A8 WO 2023072429A8 EP 2022025482 W EP2022025482 W EP 2022025482W WO 2023072429 A8 WO2023072429 A8 WO 2023072429A8
Authority
WO
WIPO (PCT)
Prior art keywords
piston
internal combustion
bowl
combustion chamber
chamber provided
Prior art date
Application number
PCT/EP2022/025482
Other languages
French (fr)
Other versions
WO2023072429A1 (en
Inventor
Olaf Berger
Inigo Guisasola
Original Assignee
Caterpillar Energy Solutions 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 Caterpillar Energy Solutions Gmbh filed Critical Caterpillar Energy Solutions Gmbh
Priority to EP22808590.8A priority Critical patent/EP4423373A1/en
Publication of WO2023072429A1 publication Critical patent/WO2023072429A1/en
Publication of WO2023072429A8 publication Critical patent/WO2023072429A8/en

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 
    • F02F3/26—Pistons  having combustion chamber in piston head
    • 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
    • F02B23/0672—Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • B23P19/042—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts specially adapted for combustion engines
    • B23P19/043—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts specially adapted for combustion engines for inserting piston-connecting rods assemblies in cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0035—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for motor-vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/06—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • 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
    • F02B23/0627—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 having additional bores or grooves machined into the piston for guiding air or charge flow to the piston bowl
    • 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)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

The present invention refers to a piston (14) for an internal combustion engine, having a piston crown (22) provided with a piston bowl (40) which includes a circumferential edge portion (42) connecting a circumferential side wall portion (44) of the piston bowl (40) to a front surface (34) of the piston crown (22), wherein a first radial diameter (dl) at the edge portion (42) is smaller than a second radial diameter (d2) at the side wall portion (44), and wherein the edge portion (42) is provided with at least one recessed section (48).
PCT/EP2022/025482 2021-10-29 2022-10-24 Piston for an internal combustion chamber provided with a piston bowl WO2023072429A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22808590.8A EP4423373A1 (en) 2021-10-29 2022-10-24 Piston for an internal combustion chamber provided with a piston bowl

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2115621.1A GB2612358B (en) 2021-10-29 2021-10-29 Piston for an internal combustion chamber provided with a piston bowl
GB2115621.1 2021-10-29

Publications (2)

Publication Number Publication Date
WO2023072429A1 WO2023072429A1 (en) 2023-05-04
WO2023072429A8 true WO2023072429A8 (en) 2024-05-10

Family

ID=78828417

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/025482 WO2023072429A1 (en) 2021-10-29 2022-10-24 Piston for an internal combustion chamber provided with a piston bowl

Country Status (3)

Country Link
EP (1) EP4423373A1 (en)
GB (1) GB2612358B (en)
WO (1) WO2023072429A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5375608U (en) * 1976-11-29 1978-06-23
JPS5375608A (en) * 1976-12-17 1978-07-05 Japanese National Railways<Jnr> Fail-safe control system for railway crossing safery devices
DE102006007130A1 (en) * 2006-02-16 2007-08-23 Daimlerchrysler Ag Piston for internal combustion engine has bowl neck provided with greater height in first direction parallel to piston pin axis than height in second direction perpendicular to first direction
US8833327B2 (en) 2011-12-28 2014-09-16 Cummins Intellectual Property, Inc. Piston and combustion chamber
EP3176403A1 (en) * 2015-12-02 2017-06-07 Caterpillar Energy Solutions GmbH Piston for a gaseous fuel internal combustion engine
US10072561B2 (en) * 2016-07-25 2018-09-11 Caterpillar Inc. Piston
JP6304351B1 (en) * 2016-11-22 2018-04-04 マツダ株式会社 diesel engine
GB2575448B (en) * 2018-07-09 2021-02-24 Caterpillar Energy Solutions Gmbh Piston removal tool

Also Published As

Publication number Publication date
GB202115621D0 (en) 2021-12-15
WO2023072429A1 (en) 2023-05-04
EP4423373A1 (en) 2024-09-04
GB2612358B (en) 2024-05-08
GB2612358A (en) 2023-05-03

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