US3738335A - Piston for internal combustion engines - Google Patents

Piston for internal combustion engines Download PDF

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Publication number
US3738335A
US3738335A US00202530A US3738335DA US3738335A US 3738335 A US3738335 A US 3738335A US 00202530 A US00202530 A US 00202530A US 3738335D A US3738335D A US 3738335DA US 3738335 A US3738335 A US 3738335A
Authority
US
United States
Prior art keywords
piston
cooling
recess
space
combustion space
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 - Lifetime
Application number
US00202530A
Other languages
English (en)
Inventor
H Hoffmann
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Application granted granted Critical
Publication of US3738335A publication Critical patent/US3738335A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02B23/0636—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 having a substantially flat and horizontal bottom
    • 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 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • 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
    • F02B23/0645—Details related to the fuel injector or the fuel spray
    • F02B23/0654—Thermal treatments, e.g. with heating elements or local cooling
    • 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

Definitions

  • the present invention relates to a piston for internal combustion engines with a ring-shaped cooling space arranged in the piston top, which is connected with a feed bore and with a discharge bore for the cooling medium, and more particularly the present invention relates to a piston with an eccentrically arranged piston combustion space recess about which the cooling space is placed.
  • the cooling spaces are normally constructed as closed rings, in which the connections for the cooling medium supply and the cooling medium discharge are located mutually opposite along a diameter through the ring. If such an annularly shaped cooling space is arranged about a piston combustion space recess, generally a uniform heat removal in relation to the circumference of the combustion space recess takes place by the cooling medium. For centrally or coaxially arranged combustion space recesses a circumferentially uniform heat removal by the cooling medium is therefore quite desired, however, this is not the case for combustion space recesses which are arranged eccentrically to the center longitudinal axis through the pistons because in that case a cooling takes place also in those areas where it is not necessary as such. Those are the areas of the piston in which the combustion space recess is located further away from the piston circumference than in other areas.
  • the present invention is concerned with the task to so construct a cooling space in the piston that a cooling is effected deliberately only where a cooling is absolutely necessary, and more particularly with a cooling medium that is still as cold as possible.
  • cooling space is constructed as open ring, to one end of which is connected the supply bore and to the other end of which is connected the discharge bore.
  • Another object of the present invention resides in a piston for internal combustion engines with a cooling means arranged therein that assures cooling only within those piston areas actually requiring such additional cooling.
  • a further object of the present invention resides in a piston for internal combustion engines with an eccentrically arranged combustion space recess which is provided with a cooling means effectively cooling only those areas of the piston top which are endangered by the eccentric location of the combustion space recess.
  • a still further object of the present invention resides in a piston for internal combustion engines which assures a more rapid flow of the cooling medium and therewith a more intense cooling due to the lower temperature of the cooling medium.
  • FIG. 1 is a plan view of a piston in accordance with the present invention
  • FIG. 2 is a cross sectional view through the piston taken along line 11-11 of FIG. 1.
  • a combustion space recess 2 is arranged in a piston 1.
  • This combustion space recess 2 is constructed axially symmetrically. Its center longitudinal axis 3 is located eccentrically to the center longitudinal axis 4 through the piston 1.
  • a ring-shaped cooling space 5 is provided in the piston top which is constructed as open ring.
  • a feed bore 6 is connected to one end of the open ring forming the cooling space 5 and a discharge bore 7 is connected to the other end thereof. The function of these two bores 6 and 7 can be interchanged if so desired or required. As can be seen from FIG.
  • the cooling space 5 is disposed about the axially symmetrically constructed combustion space recess 2 but does not extend over 360 of the circumference thereof but instead terminates within that area of the piston top which does not require any additional cooling due to the presence of a larger amount of heat-conducting material effecting removal of heat in the direction toward the cylinder walls.
  • a piston for internal combustion engines with cooling space means arranged in the piston head and connected to a supply bore and to a discharge bore for the cooling medium characterized in that the cooling space means is constructed as open-ring, to one end of which is connected the supply bore and to the other end of which is connected the discharge bore, said piston being provided with a combustion space recess arranged in the top thereof, the cooling space means being arranged about only a portion of the combustion space recess corresponding to those areas of the piston top endangered by heat, the combustion space recess being arranged eccentrically with respect to the piston axis and the cooling space means being arranged about the combustion space recess at least within those areas thereof spaced closer to the circumference of the piston, the piston combustion space recess being axially symmetrical and the cooling space means extending about the circumference thereof to an extent greater than 180 but less than 360 of the circumference of the recess, the open-ring coolant space means being disposed between the side walls of the combustion space recess and the side walls of the piston, and the opening in
  • a piston for internal combustion engines with cooling space means arranged in the piston head and connected to a supply bore and to a discharge bore for the cooling medium characterized in that the cooling space means is constructed as open-ring, to one end of which is connected the supply bore and to the other end of which is connected the discharge bore, the piston being provided with a combustion space means arranged eccentrically with respect to the piston axis and the cooling space means being arranged about only a portion of the combustion space recess corresponding to those areas of the piston top endangered by the heat, said areas being spaced closer to the circumference of the piston, the open-ring coolant space means being disposed between the side walls of the combustion space recess and the side walls of the piston, and the opening in the open-ring coolant space means being located on that side of the combustion space recess which is more remote from the side walls of the piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
US00202530A 1970-11-27 1971-11-26 Piston for internal combustion engines Expired - Lifetime US3738335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702058410 DE2058410A1 (de) 1970-11-27 1970-11-27 Kolben fuer Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3738335A true US3738335A (en) 1973-06-12

Family

ID=5789285

Family Applications (1)

Application Number Title Priority Date Filing Date
US00202530A Expired - Lifetime US3738335A (en) 1970-11-27 1971-11-26 Piston for internal combustion engines

Country Status (4)

Country Link
US (1) US3738335A (show.php)
DE (1) DE2058410A1 (show.php)
FR (1) FR2116093A5 (show.php)
GB (1) GB1315737A (show.php)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0713496B2 (ja) * 1984-09-12 1995-02-15 エ−イ− ピ−エルシ− ピストンの改良
US5771776A (en) * 1996-04-22 1998-06-30 Unisia Jecs Corporation Engine piston and metal mold
US20060037471A1 (en) * 2004-07-21 2006-02-23 Xiluo Zhu One piece cast steel monobloc piston
JP2007518924A (ja) * 2004-01-24 2007-07-12 マーレ　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング ディーゼルエンジンのためのピストンのヘッド内の燃焼凹み

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1118774B (it) * 1979-06-12 1986-03-03 Ass Eng Italia Perfezionamento relativo aglistantuffi nei motori diesel
DE19807176C2 (de) * 1998-02-20 2000-01-27 Federal Mogul Burscheid Gmbh Verfahren zur Herstellung eines Kolbens für Brennkraftmaschinen
ATE365268T1 (de) 2001-04-25 2007-07-15 Ge Jenbacher Gmbh & Co Ohg Fremdgezündete brennkraftmaschine mit mindestens einer zündeinrichtung pro zylinder

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2622570A (en) * 1949-03-15 1952-12-23 Daimler Benz Ag Diesel engine with precombustion chamber
DE1033954B (de) * 1955-08-18 1958-07-10 Maschf Augsburg Nuernberg Ag Gekuehlter Leichtmetallkolben
US2865348A (en) * 1955-03-23 1958-12-23 Schmidt Gmbh Karl Piston
FR1244830A (fr) * 1959-02-03 1960-10-28 Mahle Kg Piston en métal léger avec canaux de refroidissement et son procédé de fabrication
GB854804A (en) * 1959-02-20 1960-11-23 List Hans Improvements in and relating to internal combustion engines with air compression andself-ignition
GB912256A (en) * 1960-08-23 1962-12-05 Schmidt Gmbh Karl Improvements in or relating to the manufacture of pistons
DE1141494B (de) * 1960-03-19 1962-12-20 Karl Schmidt Ges Mit Beschraen Gekuehlter Kolben fuer Brennkraftmaschinen, vorzugsweise aus Leichtmetall

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2622570A (en) * 1949-03-15 1952-12-23 Daimler Benz Ag Diesel engine with precombustion chamber
US2865348A (en) * 1955-03-23 1958-12-23 Schmidt Gmbh Karl Piston
DE1033954B (de) * 1955-08-18 1958-07-10 Maschf Augsburg Nuernberg Ag Gekuehlter Leichtmetallkolben
FR1244830A (fr) * 1959-02-03 1960-10-28 Mahle Kg Piston en métal léger avec canaux de refroidissement et son procédé de fabrication
GB854804A (en) * 1959-02-20 1960-11-23 List Hans Improvements in and relating to internal combustion engines with air compression andself-ignition
DE1141494B (de) * 1960-03-19 1962-12-20 Karl Schmidt Ges Mit Beschraen Gekuehlter Kolben fuer Brennkraftmaschinen, vorzugsweise aus Leichtmetall
GB912256A (en) * 1960-08-23 1962-12-05 Schmidt Gmbh Karl Improvements in or relating to the manufacture of pistons

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0713496B2 (ja) * 1984-09-12 1995-02-15 エ−イ− ピ−エルシ− ピストンの改良
US5771776A (en) * 1996-04-22 1998-06-30 Unisia Jecs Corporation Engine piston and metal mold
JP2007518924A (ja) * 2004-01-24 2007-07-12 マーレ　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング ディーゼルエンジンのためのピストンのヘッド内の燃焼凹み
US20060037471A1 (en) * 2004-07-21 2006-02-23 Xiluo Zhu One piece cast steel monobloc piston
US7406941B2 (en) 2004-07-21 2008-08-05 Federal - Mogul World Wide, Inc. One piece cast steel monobloc piston

Also Published As

Publication number Publication date
GB1315737A (en) 1973-05-02
FR2116093A5 (show.php) 1972-07-07
DE2058410A1 (de) 1972-06-08

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