US3447519A - Lubricating arrangement for a two-stroke-cycle internal combustion engine - Google Patents

Lubricating arrangement for a two-stroke-cycle internal combustion engine Download PDF

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Publication number
US3447519A
US3447519A US687323A US3447519DA US3447519A US 3447519 A US3447519 A US 3447519A US 687323 A US687323 A US 687323A US 3447519D A US3447519D A US 3447519DA US 3447519 A US3447519 A US 3447519A
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US
United States
Prior art keywords
valve member
carburetor
housing
stream
stroke
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
US687323A
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English (en)
Inventor
Milos Marcik
Rudolf Jokl
Jiri Kubinek
Evzen Ritschl
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Jawa NP
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Jawa NP
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Publication date
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Publication of US3447519A publication Critical patent/US3447519A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M3/00—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture
    • F01M3/02—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture with variable proportion of lubricant to fuel, lubricant to air, or lubricant to fuel-air-mixture
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S123/00—Internal-combustion engines
    • Y10S123/01—Interchangeable
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/35—Air line lubricators

Definitions

  • a carburetor 4for a two-stroke-cycle intern-al combustion engine is provided with ⁇ a conduit leading to an opening in an edge portion of the throttle valve which later- 'ally ⁇ bounds -t-he stream of combustion air through -the carburetor housing.
  • Lubricating oil is fed to the opening separately from the liquid fuel, and is dispersed in the passing stream.
  • the arrangement is applicable to slide valves and to butterfly valves.
  • This invention relates to a lubricating arrangement for a two-'stroke-cycle intern-al combustion engine, and particularly to :an arrangement in which ⁇ the lubricating oil fis fed to the engine dispersed in the fuel mixture.
  • the liquid fuel and the oil are separately fed to the fuel system either in the intake manifold or in the carburetor. It is :a common drawback of both arrangements as they were known heretofore that the oil is inadequately dispersed Iin the fuel mixture at least under some operating conditions so that some of the oil does not reach the cylinder surfaces which zare -to be lubricated, lbut is mainly burned to form Ia smoky exhaust gas. Oil which is not fully ⁇ atomfized may Ialso clog conduits in the carburetor.
  • the invention in one of its aspects, provides a continuous, eircumferentially closed conduit for lubricating oil which extends outward of the carburetor housing and communicates with the air path through the housing through an opening in an edge portion of -the throttle valve which laterally *bounds the air stream.
  • FIG. 1 shows a carburetor of -the invention in elevational section
  • FIG. 1 there is seen a carburetor for 1a two-'strokecyole gasoline engine whose housing 8 has a straight tubular portion 48 for ow of a stream of combusti-on air through the carburetor and into the engine, .and ya hollow Iside earm 7 in ⁇ which a slide Valve member 12 is guided 'transversely to the ⁇ stream of air into land out of the tubular portion 48.
  • the valve 4member 12 is operated by -a bar 49 which extends outward of .the carburetor housing.
  • a d-uct 10 in the valve mem'ber 12 terminates in an orifice in an edge portion 11 of the valve member which laterally bounds the air stream at the downstream end of the valve member, the orifice ⁇ being directed transversely of the tubular portion 48.
  • a cover 5 closes the ⁇ side arm 7, and a bore 4 in the cover 5 is provided ⁇ wi-th :a connector 3 whose pass-age 2 connects yan oil feed pipe 1 coming from a non-'illustrated and lconventional metering pump with a pipe 6 in the side arm 7.
  • the pipe 6 is received in the duct 10 in sealing, telescoping engagement.
  • the duct 10, pipe 5, and connector 3 thus form a continuous, circumferentially closed conduit which extends outward of the carburetor housing and to which oil is 'being fed 'by the pipe 1 for transverse discharge into the yair stream in any operating position of the slide valve member 12 during the rectilinear movement of the latter.
  • the valve member 12 also carries a metering rod 50 which controls Ithe yadmission of gasoline to the tu'bular portion 48 of the carburetor in a conventional manner not itself relevant to lthe invention, land upstream from the edge portion 11.
  • the lubricating oil is thus discharged into a portion of the fuel-bearing air stream whose cross section is normally restricted, :and whose velocity .and turbulence are Iat maximum values, thus ensuring ⁇ dispersion of the lubricant ⁇ into line droplets which are carried by the stream into the engine.
  • FIG. l The operating principle of the arrangement shown in FIG. l is equally applicable to ⁇ a carburetor whose air supply is throttled :by a butterlly valve, as shown in FIGS. 2 and 3.
  • a ⁇ circular disc 43 is mounted on Ia shaft 42 for rotation about a turning axis perpendicular lto the axis of a cylindrical tube 51 Whose iiow section is controlled by the disc.
  • the shaft 42 has an axial bore 41 which is connected with a duct 45 in the disc 43 by a sealing sleeve 44 partly received in the disc and partly in the stationary shaft 42.
  • the duct '45 terminates in antechnische in the circumference of the disc 43 which bounds an air stream through the tube 51 in all operating positions of the disc, and restricts the ilow section of the tube in the position of the disc illustrated in FIG. 2.
  • Another shaft 52 coaxial with the shaft 42 is xedly fastened to the disc 43, and is provided with a radial arm 53 for controlling the throttling edect of the disc.
  • the aforementioned oil feed pipe 1 is sealingly attached to the portion of the shaft 42 which projects from the tube 51.
  • FIG. 4 shows a modified embodiment of the invention which is identical with that illustrated in FIG. 1 except as specifically described hereinafter.
  • the pipe 13 partly extends outward of an orifice in the edge portion of the valve member V14 which laterally bounds the air stream through the carburetor at the downstream end of the member 14, and downstream from the point of fuel admission.
  • the axial orifice of the pipe 13 can discharge lubricating oil.
  • radial bores 16 in the pipe 13, which face in the direction of the air stream, are exposed and release the oil into the air stream so that the oil is discharged closely adjacent the edge portion 15 of the valve member 14 in all operating positions of the latter.
  • the radial bores 16 are practically sealed.
  • a flexible metal tube 17 connects a non-illustrated metering pump for lubricating oil with a longitudinal bore 18 in a bar 19 which partly projects from the carburetor housing and is fixedly fastened to a sliding valve member 20 in the carburetor.
  • the valve member 20 throttles the air stream through the carburetor as described with reference to FIG. 1.
  • the valve member 20' is shifted by means of a non-illustrated throttle linkage attached to the portion of the bar 19 which projects from the carburetor housing.
  • a restricted terminal portion 21 of the bore 1S communicates with a conduit portion 21a formed in the valve member 20 and terminates in the edge portion 22 of the valve member which laterally bounds the air stream through the carburetor.
  • a pipe 24 is fixedly attached to the valve member and moves inwardly and outwardly of the carburetor housing 23 during the rectilinear reciprocating movement of the valve member 28.v
  • a flexible hose 25 connects the bore 29 of the pipe 23 with a lubricant pump, not shown.
  • the pipe 24 communicates with a coaxial orifice 26 in the edge face 27 of the valve member 28 which laterally bounds the air stream through the carburetor housing 54 at the downstream end of the valve member.
  • lubricating oil is supplied by a tube 30 to the bore 31 of a nipple 32 on the carburetor housing 33 which is otherwise identical with the housing 8 shown in FIG. 1.
  • the bore 31 communicates with an axial groove 35 in the inner wall of the housing side arm.
  • the wall is sealingly engaged by a corresponding wall of a Valve member 37 having an orifice 36 which travels along the groove 35 during the normal valve movements, and thereby connects the nipple 32 with a duct 38 in the valve member 37 leading to an orifice in the downstream edge 39 of the valve member.
  • the orifices in the edge portions of all embodiments of the invention are defined and bounded by annular parts of the corresponding valve members and face transversely of the direction of flow of the air stream or fuel mixtures through the carburetors of the invention.
  • a carburetor for a two-stroke-cycle internal combustion engine having ⁇ a housing defining a path for a stream of air of combustion, separate means for admitting a liquid fuel and lubricating oil to said path for mixing with said stream, and a throttling valve member arranged in said housing for movement transversely of said stream, a plurality of operative positions, the valve member having an exposed edge portion laterally bounding said stream, the improvement in the means for admitting the lubricating oil to said path
  • conduit communicating with said opening for discharge of said lubricating oil from said opening into said stream.
  • conduit has two telescopically engaged tubular portions respectively fixedly fastened to said housing and to said valve member, said movement of the valve member being substantially rectilinear.
  • a bar member attached to said valve member and extending outward of said housing for actuating said movement of the valve member, said bar member being formed with a bore constituting a portion of said conduit.
  • valve member and said housing having respective walls sealingly engaging each other during the movement of the valve member, respective portions of said conduit being formed in said walls and communicating with each other through openings in said walls.
  • edge portion having an annular part defining and bounding said opening, the opening facing transversely of said path.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
US687323A 1966-12-03 1967-12-01 Lubricating arrangement for a two-stroke-cycle internal combustion engine Expired - Lifetime US3447519A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS770066 1966-12-03

Publications (1)

Publication Number Publication Date
US3447519A true US3447519A (en) 1969-06-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
US687323A Expired - Lifetime US3447519A (en) 1966-12-03 1967-12-01 Lubricating arrangement for a two-stroke-cycle internal combustion engine

Country Status (8)

Country Link
US (1) US3447519A (xx)
JP (2) JPS498656B1 (xx)
AT (1) AT292387B (xx)
BE (1) BE707404A (xx)
DE (2) DE6609699U (xx)
GB (1) GB1204536A (xx)
NL (1) NL6716412A (xx)
SE (1) SE331479B (xx)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618578A (en) * 1969-08-01 1971-11-09 British Motor Corp Ltd Motor vehicle fuel systems
US3886914A (en) * 1973-12-14 1975-06-03 Ford Motor Co Lubricant metering system
US3908612A (en) * 1972-05-18 1975-09-30 Daimler Benz Ag Rotary piston internal combustion engine
US3974806A (en) * 1972-08-04 1976-08-17 Toyota Jidosha Kogyo Kabushiki Kaisha Gas labyrinth carburetor throttle shaft seal
US4057041A (en) * 1974-10-28 1977-11-08 Kabushiki Kaisha Keihinseiki Seisakusho Icing preventing device for a carburetor for two-cycle engine use
US4134379A (en) * 1975-04-08 1979-01-16 Robert Bosch Gmbh Fuel injection system
US4632085A (en) * 1984-02-24 1986-12-30 Honda Giken Kogyo Kabushiki Kaisha Lubricating oil supply controller
US5195481A (en) * 1990-11-22 1993-03-23 Sanshin Kogyo, Kk Two-cycle engine with separate lubricating system
US5570661A (en) * 1994-04-22 1996-11-05 Sanshin Kogyo Kabushiki Kaisha Induction system lubricant system for two-cycle engines
US6085702A (en) * 1997-03-21 2000-07-11 Yamaha Hatsudoki Kabushiki Kaisha Lubrication system for an engine having a floatless carburetor
AU734305B2 (en) * 1997-03-10 2001-06-07 Honda Giken Kogyo Kabushiki Kaisha Carburetor for two-cycle engine
US20080116594A1 (en) * 2004-08-31 2008-05-22 Anthony John Williams Mechanical Air Fuel Ratio Regulating Carburettor with Fuel Pressure Regulation
US9181883B2 (en) * 2013-01-18 2015-11-10 Nagesh S. Mavinahally Four cycle engine carburetors

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1473293A (en) * 1923-11-06 Toisl-cootsol device
US1617605A (en) * 1927-02-15 Automatic compensating carburetor
US1623053A (en) * 1922-12-30 1927-04-05 Standard Dev Co Art of controlling combustion in internal-combustion engines
US3179099A (en) * 1961-11-10 1965-04-20 Auto Union Gmbh Internal-combustion engine with gasoline/oil-mixture control
US3180329A (en) * 1961-01-30 1965-04-27 Auto Union Gmbh Metering device for two-cycle internal combustion engines
US3208442A (en) * 1963-02-15 1965-09-28 Heinkel Ag Ernst Lubricating system for two-stroke cycle internal combustion engines
US3212485A (en) * 1960-12-01 1965-10-19 Auto Union Gmbh Method and apparatus for operating internal combustion engines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1473293A (en) * 1923-11-06 Toisl-cootsol device
US1617605A (en) * 1927-02-15 Automatic compensating carburetor
US1623053A (en) * 1922-12-30 1927-04-05 Standard Dev Co Art of controlling combustion in internal-combustion engines
US3212485A (en) * 1960-12-01 1965-10-19 Auto Union Gmbh Method and apparatus for operating internal combustion engines
US3180329A (en) * 1961-01-30 1965-04-27 Auto Union Gmbh Metering device for two-cycle internal combustion engines
US3179099A (en) * 1961-11-10 1965-04-20 Auto Union Gmbh Internal-combustion engine with gasoline/oil-mixture control
US3208442A (en) * 1963-02-15 1965-09-28 Heinkel Ag Ernst Lubricating system for two-stroke cycle internal combustion engines

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618578A (en) * 1969-08-01 1971-11-09 British Motor Corp Ltd Motor vehicle fuel systems
US3908612A (en) * 1972-05-18 1975-09-30 Daimler Benz Ag Rotary piston internal combustion engine
US3974806A (en) * 1972-08-04 1976-08-17 Toyota Jidosha Kogyo Kabushiki Kaisha Gas labyrinth carburetor throttle shaft seal
US3886914A (en) * 1973-12-14 1975-06-03 Ford Motor Co Lubricant metering system
US4057041A (en) * 1974-10-28 1977-11-08 Kabushiki Kaisha Keihinseiki Seisakusho Icing preventing device for a carburetor for two-cycle engine use
US4134379A (en) * 1975-04-08 1979-01-16 Robert Bosch Gmbh Fuel injection system
US4632085A (en) * 1984-02-24 1986-12-30 Honda Giken Kogyo Kabushiki Kaisha Lubricating oil supply controller
US5195481A (en) * 1990-11-22 1993-03-23 Sanshin Kogyo, Kk Two-cycle engine with separate lubricating system
US5570661A (en) * 1994-04-22 1996-11-05 Sanshin Kogyo Kabushiki Kaisha Induction system lubricant system for two-cycle engines
AU734305B2 (en) * 1997-03-10 2001-06-07 Honda Giken Kogyo Kabushiki Kaisha Carburetor for two-cycle engine
US6085702A (en) * 1997-03-21 2000-07-11 Yamaha Hatsudoki Kabushiki Kaisha Lubrication system for an engine having a floatless carburetor
US20080116594A1 (en) * 2004-08-31 2008-05-22 Anthony John Williams Mechanical Air Fuel Ratio Regulating Carburettor with Fuel Pressure Regulation
US7744066B2 (en) * 2004-08-31 2010-06-29 Anthony John Williams Mechanical air fuel ratio regulating carburetor with fuel pressure regulation
US9181883B2 (en) * 2013-01-18 2015-11-10 Nagesh S. Mavinahally Four cycle engine carburetors

Also Published As

Publication number Publication date
BE707404A (xx) 1968-04-16
DE1576380A1 (de) 1970-04-16
JPS5116567B1 (xx) 1976-05-25
DE6609699U (de) 1972-09-07
NL6716412A (xx) 1968-06-04
GB1204536A (en) 1970-09-09
JPS498656B1 (xx) 1974-02-27
SE331479B (xx) 1971-01-04
AT292387B (de) 1971-08-25

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