US2657678A - Cooling system for the head portion of pistons of high-speed internalcombustion engines - Google Patents

Cooling system for the head portion of pistons of high-speed internalcombustion engines Download PDF

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Publication number
US2657678A
US2657678A US241448A US24144851A US2657678A US 2657678 A US2657678 A US 2657678A US 241448 A US241448 A US 241448A US 24144851 A US24144851 A US 24144851A US 2657678 A US2657678 A US 2657678A
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US
United States
Prior art keywords
piston
chamber
cooling
oil
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
US241448A
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English (en)
Inventor
Maybach Karl
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.)
Rolls Royce Solutions GmbH
Original Assignee
Maybach Motorenbau 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 Maybach Motorenbau GmbH filed Critical Maybach Motorenbau GmbH
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Publication of US2657678A publication Critical patent/US2657678A/en
Anticipated expiration legal-status Critical
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/10—Cooling by flow of coolant through pistons
    • 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
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together
    • 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

Definitions

  • the piston diameter can be considerably increased if appropriate cooling, particularly by coolant supplied under pressure through pumping tubes, is provided, the coolant being the oil as used in the crankcase of the engine. Because of the pump action of the tubes, arrangements of this type depend on the engine speed, and usually much more cooling oil is supplied to the piston head than needed. Because of the unfavorable proportion between piston stroke and diameter of the pumping tubes, the oil pressure in the cooling chamber is too great at the conventional high speeds for which the engines are built. During the suction stroke of the pumping tubes, the pressure in the cooling chamber is so much reduced that the flow of oil is interrupted, oil vapor alternates with liquid oil, and air enters the cooling conduits resulting eventually in the formation of undesired foam.
  • Fig. 1 is a longitudinal sectional'viewofa"power piston and part sectional view of' the cooling oil circulating system according to the invention
  • Fig. 2 is a longitudinal sectional View of. the
  • Fig. 4 is a top view of the piston illustrated in Fig. 3 with the head part removed.
  • Cooling oil is supplied. by pump 9' in. conduit 9.
  • oil flows from conduit 9 through connectorl, valve I3, and tube 4, into-tube. 3, which terminates incooling chamber 2.
  • the volume made available in conduit 3 during an up-stroke of piston I is larger than the volume. of the oil. supplied by pump 9 to conduit 9, and; since no oil can escape through conduits 5, 5' and I'll because of the check valve I4 in connector 8, the pressure in chamber 2 is reduced and piston 20 forced thereinto by spring 22 to compensate the difference between the.- increase of available space and the volume of the oil supplied. by pump 9'. If. the pressure in chamber 2 falls below atmospheric pressure, the latter supplements-the action of spring 22.
  • the power piston consists of a-main body 3
  • the main body 3-I hassaniaxia'l bore 35 receiving an equalizing piston 34.
  • head part 32 is provided with an internal, axial, tubular extension or guide means 36', projecting downwardly and through a.huhpart. 3.1; of piston 34.
  • is provided with an annular projection 38 extending radially inward for supporting springs 43 which extend into the annular recess formed in the underside of pist0IL34 by the hub portion 31. Springs 43' press the annular piston. 34 against thecentral.
  • ribs 33 closing the central cooling channel'sv 30: when. the spring-loaded. piston 34 overcomes the pressure. ofIt'he coolant in the cooling channels.
  • the lower end of the interior 39 of guide 36 is closedzby a cover 40 having an aperture 4
  • FIGS 3 and 45 illustrate a modification of the piston cooling system according to the invention having a plurality of. equalizing pistons.
  • the power piston comprises aamain part 58 and a head part- 51 which is bolted to the former by bolts 52.
  • Cooling 011' is supplied through conduit 3 to the cooling chamber 53 inthe interior of the head part 5I' the same manner as in the embodiments shown in- Figs.- land 2 and is relieved from the cooling chamber through aconduit 5".
  • the head part 5 I is provided with internal cooling ribs 54 projecting into-the cooling chamber.
  • said compensating means comprising a movable member forming a movable wall portion of said chamber and being adapted to decrease the internal volume of said'chamber upon an up-stroke of the power piston and to increase the internal volume of said chamber upon a down-stroke of the power piston.
  • a cooling system as defined in claim '1 said compensating means comprising a piston chamber connected and communicating with said cooling chamber, an equalizing piston in said piston chamber, and a spring resting on the power piston and on said equalizing piston for pressing the latter against the pressure of the coolant in said cooling chamber.
  • a compensated cooling system for the head portion of a power piston for high-speed internal combustion engines comprising cooling channels disposed in the head portion and being completely closed against the cylinder in which the piston operates, coolant circulating conduits disposed within and connected and reciprocating with the power piston and communicating with said channels, each of said conduits comprising a straight part parallel to the longitudinal axis of the power piston, stationary coolant supply and removal tubes individually extending into said straight parts, a main piston part connected with the head portion of the said power piston, a piston chamber coaxial of and within said main piston part and communicating with said channels, and a spring-loaded equalizing piston in said piston chamber.
  • a cooling system for the head portion of a power piston for high-speed internal combustion engines comprising a coolant, a cooling chamber in the head portion of the power piston, coolant conduits in and reciprocating with the power piston and terminating in said cooling chamber, stationary coolant supply and removal tubes individually extending into said conduits, a piston chamber extending from said cooling chamber axially of the power piston, a piston rod having a wrist pin bearing end, a tubular guide means connected with said head portion, extending through said piston chamber coaxially of the power piston, and terminating adjacent to said bearing end, an amiular equalizing piston in said piston chamber and disposed around said guide means, and spring means resting on said power piston and on said equalizing piston for pressing the latter against the pressure of the coolant in said cooling chamber, said coolant being a lubricating oil and the interior of said guide means communicating with the cooling chamber and receiving oil therefrom and discharging it on said bearing end.

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  • 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)
  • Lubrication Of Internal Combustion Engines (AREA)
US241448A 1950-09-09 1951-08-11 Cooling system for the head portion of pistons of high-speed internalcombustion engines Expired - Lifetime US2657678A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE291903X 1950-09-09

Publications (1)

Publication Number Publication Date
US2657678A true US2657678A (en) 1953-11-03

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ID=6070502

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Application Number Title Priority Date Filing Date
US241448A Expired - Lifetime US2657678A (en) 1950-09-09 1951-08-11 Cooling system for the head portion of pistons of high-speed internalcombustion engines

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US (1) US2657678A (is")
BE (1) BE503813A (is")
CH (1) CH291903A (is")
FR (1) FR1037028A (is")
GB (1) GB690298A (is")

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2759461A (en) * 1953-06-16 1956-08-21 Maybach Motorenbau Gmbh Oil-cooled piston for a high speed internal combustion engine, particularly for a diesel motor for vehicles
US3230940A (en) * 1963-04-17 1966-01-25 Sulzer Ag Piston engine
US3230942A (en) * 1963-04-05 1966-01-25 Sulzer Ag Reciprocating internal combustion engine
US3230941A (en) * 1963-04-23 1966-01-25 Sulzer Ag Internal combustion engine
US3709109A (en) * 1969-11-07 1973-01-09 Kloeckner Humboldt Deutz Ag Piston cooling arrangement for a reciprocating piston internal combustion engine with an injection nozzle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800119A (en) * 1955-05-05 1957-07-23 Maschf Augsburg Nuernberg Ag Arrangement for cooling the piston of internal combustion engines

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE265555C (is") *
DE272054C (is") *
FR723470A (fr) * 1931-09-30 1932-04-09 Dispositif perfectionné de piston étanche
US2241629A (en) * 1940-04-20 1941-05-13 Gen Motors Corp Oil cooled piston
GB547111A (en) * 1941-06-12 1942-08-13 Herbert Sammons Improvements in and relating to internal combustion engines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE265555C (is") *
DE272054C (is") *
FR723470A (fr) * 1931-09-30 1932-04-09 Dispositif perfectionné de piston étanche
US2241629A (en) * 1940-04-20 1941-05-13 Gen Motors Corp Oil cooled piston
GB547111A (en) * 1941-06-12 1942-08-13 Herbert Sammons Improvements in and relating to internal combustion engines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2759461A (en) * 1953-06-16 1956-08-21 Maybach Motorenbau Gmbh Oil-cooled piston for a high speed internal combustion engine, particularly for a diesel motor for vehicles
US3230942A (en) * 1963-04-05 1966-01-25 Sulzer Ag Reciprocating internal combustion engine
US3230940A (en) * 1963-04-17 1966-01-25 Sulzer Ag Piston engine
US3230941A (en) * 1963-04-23 1966-01-25 Sulzer Ag Internal combustion engine
US3709109A (en) * 1969-11-07 1973-01-09 Kloeckner Humboldt Deutz Ag Piston cooling arrangement for a reciprocating piston internal combustion engine with an injection nozzle

Also Published As

Publication number Publication date
FR1037028A (fr) 1953-09-14
CH291903A (de) 1953-07-15
BE503813A (is")
GB690298A (en) 1953-04-15

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