US3633468A - Piston of an internal combustion engine - Google Patents

Piston of an internal combustion engine Download PDF

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Publication number
US3633468A
US3633468A US874203A US3633468DA US3633468A US 3633468 A US3633468 A US 3633468A US 874203 A US874203 A US 874203A US 3633468D A US3633468D A US 3633468DA US 3633468 A US3633468 A US 3633468A
Authority
US
United States
Prior art keywords
piston
skirt
sleeve
wall
coolant
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
US874203A
Other languages
English (en)
Inventor
Willem Marinus Burck
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.)
IHC Holland NV
Original Assignee
IHC Holland NV
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 IHC Holland NV filed Critical IHC Holland NV
Application granted granted Critical
Publication of US3633468A publication Critical patent/US3633468A/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
    • 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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F02F3/0069—Multi-part pistons the crown and skirt being interconnected by the gudgeon pin
    • 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

Definitions

  • the invention relates to a piston of an internal combustion engine, said piston having been provided with a hollow void underneath the piston bottom, said hollow void having been provided with a coolant feed and an outlet which has been positioned and dimensioned in such a way that there is always a quantity of coolant in the hollow void, said coolant only partially filling said void.
  • a piston is generally known. Cooling the piston is effected by splashing the quantity of coolant in the hollow void against the lower part of the piston bottom every time the piston moves upwards and downwards.
  • the coolant may be supplied from the usual pressure-feed circuit of the internal combustion engine via passages in the connect ing rod and piston rod, if the latter is present.
  • the disad- A vantage of this way of cooling the piston is that the coolant hits the surface of the piston bottom generally in a perpendicular direction, because of which in principle the coolant will not flow along the piston bottom, and the heat to be carried off will only with difficulty be transmitted to the coolant.
  • This makes for a poor cooling of the piston bottom, causing the coolant coming in direct contact with the bottom to become overheated, because it is not regularly renewed. This may present difficulties when this oil is coming from the lubricant circuit, for example.
  • the piston bottom of which has surface parts entirely or substantially covered by or abutting a surface perpendicular to the central axis of the piston the orifice(s) or slot(s) are according to the invention preferably situated in the neighborhood of those surface parts. At the site of those surface parts the coolant will be inclined to flow away from the surface. By directing the jet of coolant towards those parts on purpose, it is ensured that the cooling of those parts is done properly, and the layer of coolant is constantly changed.
  • the supply pipe preferably empties in the hollow void via an angular recess at the innermost side of the piston skirt. This makes for an even distribution of the coolant at the site of the slot, and cooling of the piston skirt as well.
  • an insert to be constructed inside the piston said insert having been provided with an axial bore passing through a central thickened part, said bore communicating with a discharge bore in the piston rod, said insert having an additional void situated in a concentric position around the axial bore and communicating with the supply pipe in the piston rod, and a cylindrical wall or rib which forms the annular recess together with the inner wall of the piston, in which rib the hollow void of the piston is situated and which has been provided with passages connecting the aforesaid'concentric void with the annular hollow void.
  • the drawing shows a piston l with a bottom 2, a skirt 3, a lower cover 4 with a piston rod 5.
  • the piston rod is located in a crosshead 6 connected to the connecting rod 7, said connecting rod 7 being mounted on a pivot 8.
  • Crosshead, connecting rod and pivot have not been shown in detail, as they are irrelevant to a proper understanding of the invention.
  • an insert 9 provided with a centrally thickened portion 10 with a bore communicating with the discharge bore 11 in the piston rod.
  • a passage 12 has been constructed disposed concentrically around this discharge bore 11, and opening into a hollow void 13 formed between the lower part of the insert 9 and the cover 4.
  • the insert has an annular wall or rib 14 which forms an annular hollow void 15 together with the skirt 3, ending immediately underneath the bottom 2 in such a way that an annular slot 16 is formed at the site.
  • the insert has passages 17 which connect the annular recess 15 to the void 13.
  • a hollow void 18 is thus formed, in which hollow a quantity of oil is collected below and around the outlet of the discharge 11 starting in the thickened portion 10 during each lower reach of the stroke.
  • the excess oil will flow off to the sump via the discharge pipe 11. There will not be a column in the discharge pipe, which column might have an adverse action, because the open passage of the outlet is large compared with the quantity of oil to be carried off.
  • the slot through which the stream of oil appears and will flow along the piston bottom naturally need not be at exactly the highest level of the interior bottom surface of the piston, as it is in the drawing. Neither has the slot to be of annular design.
  • the oil may also be supplied via a number of pipes, the outlets of which end so closely below the bottom surface that a slot is obtained at the site of each pipe. lt will be obvious that another coolant may also be used instead of oil, said coolant in that case being'supplied in a different way, for instance via a separate cooling circuit.
  • a piston for an internal combustion engine said piston having a piston rod connected thereto, a wall on the same side of said piston as the piston rod, a bottom on the side of said piston opposite said wall, a skirt extending between said wall and said bottom, said skirt, wall and bottom together defining a void within said piston that is partly filled with a quantity of jacent surface of said bottom a restricted passage between opposite sides of the sleeve, said surface of said bottom at the location of said restricted passage having a cross-sectional contour in the shape of a gently curved line connecting the inner surface of the skirt with a convex central portion of said bottom, said convex portion extending substantially within the cylindrical wall of said sleeve, the tangent to said curved line at a location along said restricted passage being perpendicular to the axis of the piston 1'' I! l 1 I

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)
US874203A 1968-11-05 1969-11-05 Piston of an internal combustion engine Expired - Lifetime US3633468A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6815749A NL6815749A (da) 1968-11-05 1968-11-05

Publications (1)

Publication Number Publication Date
US3633468A true US3633468A (en) 1972-01-11

Family

ID=19805072

Family Applications (1)

Application Number Title Priority Date Filing Date
US874203A Expired - Lifetime US3633468A (en) 1968-11-05 1969-11-05 Piston of an internal combustion engine

Country Status (7)

Country Link
US (1) US3633468A (da)
BE (1) BE741029A (da)
DE (1) DE1956503B2 (da)
DK (1) DK126705B (da)
FR (1) FR2022607A1 (da)
GB (1) GB1255085A (da)
NL (1) NL6815749A (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180216733A1 (en) * 2015-09-25 2018-08-02 Mahle International Gmbh Piston for an internal combustion engine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2723619C2 (de) * 1977-05-25 1984-10-04 Karl Schmidt Gmbh, 7107 Neckarsulm Mehrteiliger, flüssigkeitsgekühlter Kolben für Brennkraftmaschinen
JPS5841248A (ja) * 1981-09-05 1983-03-10 Mitsubishi Heavy Ind Ltd ピストン
DE3403624A1 (de) * 1984-02-02 1985-08-08 Kolbenschmidt AG, 7107 Neckarsulm Gebauter, fluessigkeitsgekuehlter kolben fuer brennkraftmaschinen
DE4209827A1 (de) * 1992-03-26 1993-09-30 Enrico Hilbert Kolbenschmiersystem
DE19834138C1 (de) * 1998-07-29 1999-11-11 Daimler Chrysler Ag Brennkraftmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE528003A (da) *
US1157347A (en) * 1913-12-26 1915-10-19 Gen Electric Piston-cooling means.
DE391944C (de) * 1923-03-10 1924-03-13 Viktor Rembold Dr Ing Kuehleinrichtung von Kolben fuer Verbrennungskraftmaschinen
US1547687A (en) * 1922-07-07 1925-07-28 Fried Krupp Germaniawerft Ag Cooled composite piston for internal-combustion engines
US1761864A (en) * 1926-10-12 1930-06-03 Firm Maschinenfabrik Augsburg Piston cooling device for internal-combustion engines
GB563521A (en) * 1943-04-02 1944-08-17 Richardsons Westgarth & Co Improvements in the pistons of internal combustion engines
GB780529A (en) * 1954-05-14 1957-08-07 Sulzer Ag Improvements relating to the cooling of the pistons of internal combustion engines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE528003A (da) *
US1157347A (en) * 1913-12-26 1915-10-19 Gen Electric Piston-cooling means.
US1547687A (en) * 1922-07-07 1925-07-28 Fried Krupp Germaniawerft Ag Cooled composite piston for internal-combustion engines
DE391944C (de) * 1923-03-10 1924-03-13 Viktor Rembold Dr Ing Kuehleinrichtung von Kolben fuer Verbrennungskraftmaschinen
US1761864A (en) * 1926-10-12 1930-06-03 Firm Maschinenfabrik Augsburg Piston cooling device for internal-combustion engines
GB563521A (en) * 1943-04-02 1944-08-17 Richardsons Westgarth & Co Improvements in the pistons of internal combustion engines
GB780529A (en) * 1954-05-14 1957-08-07 Sulzer Ag Improvements relating to the cooling of the pistons of internal combustion engines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180216733A1 (en) * 2015-09-25 2018-08-02 Mahle International Gmbh Piston for an internal combustion engine
US10352444B2 (en) * 2015-09-25 2019-07-16 Mahle International Gmbh Piston for an internal combustion engine

Also Published As

Publication number Publication date
FR2022607A1 (da) 1970-07-31
GB1255085A (en) 1971-11-24
DK126705B (da) 1973-08-13
BE741029A (da) 1970-04-01
DE1956503A1 (de) 1970-06-11
DE1956503B2 (de) 1973-02-15
NL6815749A (da) 1970-05-08

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