EP0350796A2 - Gasbetriebene Zweitakt-Brennkraftmaschine - Google Patents

Gasbetriebene Zweitakt-Brennkraftmaschine Download PDF

Info

Publication number
EP0350796A2
EP0350796A2 EP89112391A EP89112391A EP0350796A2 EP 0350796 A2 EP0350796 A2 EP 0350796A2 EP 89112391 A EP89112391 A EP 89112391A EP 89112391 A EP89112391 A EP 89112391A EP 0350796 A2 EP0350796 A2 EP 0350796A2
Authority
EP
European Patent Office
Prior art keywords
engine
lubricating oil
gas
outer housing
container
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.)
Ceased
Application number
EP89112391A
Other languages
English (en)
French (fr)
Other versions
EP0350796A3 (de
Inventor
Yoshiharu Yokoyama
Shigeru Akiyama
Kazuhito Kitano
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.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
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 Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Publication of EP0350796A2 publication Critical patent/EP0350796A2/de
Publication of EP0350796A3 publication Critical patent/EP0350796A3/de
Ceased legal-status Critical Current

Links

Images

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • 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
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
    • F02B63/044—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators the engine-generator unit being placed on a frame or in an housing
    • F02B2063/046—Handles adapted therefor, e.g. handles or grips for movable units
    • 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
    • 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
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Definitions

  • the invention relates to a separate lubrication type engine and a lubricating oil feeding device therefore, in particular, a gas engine equipped with a fuel gas supplying system and a separate lubricating oil feeding system both terminating into an intake pipe of the engine.
  • lubricating oil is forced to necessary portions of the engine, e.g. into the intake passage, mixed with the intake air and is fed into the crankcase or combustion chambers together with the intake air.
  • the plunger pump driven by the engine crankshaft has been widely used as the lubricating oil pump.
  • oil feed by the plunger pump becomes discontinuous because it discharges oil intermittently, and there is a problem that this tendency becomes more significant and engine lubrication becomes more unstable especially as the oil feed becomes minimal.
  • an object of the present invention aims to provide a separate lubricating type engine, especially a gas engine, providing continuous and reliable oil lubrication.
  • another object of the present invention is to provide a lubricating oil feeding device to be used in conjunction with a separate lubrication type engine, said feeding device being capable of feeding minimal amounts of oil continuously and smoothly and being also capable of feeding oil always steadily even when mixed with air or even when the height of the lubricating oil feeding device relative to the lubricating oil tank is changed or reversed.
  • the above goals are achieved by means of a separate lubrication type engine, in particular a gas engine as indicated above, having a lubricating oil feeding device with the improvement of said lubricating oil feeding device to form an oil pump disposed in between the lubricating oil container and the lubricating oil receiving portions of the engine, said oil pump discharging oil by squeezing a resilient tube through which the supplied oil passes by means of a continuously revolving squeezing means in contact with the resilient tube and continuously driven by a drive means.
  • the oil pump is made to comprise said elastic tube disposed midway of the oil feeding passage interconnecting the lubricating points of the engine with the lubricating oil container, an outer housing having a circular inner surface against which the elastic tube contacts from inside, an inner housing adapted to rotate within the outer housing, rollers rotatably supported by said inner housing for squeezing the elastic tube between the interior of the outer housing and the exterior of the rollers, and a drive means for rotating the innner housing.
  • said outer housing is fastened co-axially on the case of a speed reducer driven by said drive means, with the inner housing positioned within the outer housing and fixed on an output shaft of said speed reducer to be rotatable together with said output shaft thereof.
  • said inner housing has a pulley-shaped structure supporting rotatably a pair of opposite rollers, the axes of which extend in parallel to the axis of the inner housing, said rollers leaving a space to the interior of the outer housing adapted to receive a radially compressed portion of the elastic tube which is stationarily disposed between said inner and outer housings, such that both free ends of the tube extend outwards of the outer housing adjacently spaced from each other to be connected to the lubricating oil tank and the intake pipe of the engine, respectively.
  • the oil pump of the separate lubrication type engine advantageously comprises arcuate tube guides disposed oppositely at the inner housing, either separately or integrally, in order to guide those portions of the elastic tube not being squeezed by at least one of the rollers.
  • an electric motor is employed to act as a drive means and is preferably integrated with said speed reducer.
  • crankshaft of the engine In compliance with a deviating layout of the engine, it could also be advantageous to utilise the crankshaft of the engine to form the drive means of the oil pump.
  • said electric motor, speed reducer and tube pump are assembled co-axially to form an integrated component of a lubricating oil feeding system of the engine.
  • the aforeindicated separate lubricating type engine is designed to be assembled comprising: - a box-shaped case receiving the radiator on the right of the vertically disposed battery, the coolant circulating pump, the coolant pressure regulator, an electromotive lubricating oil pump, with the radiator being adapted to suck ambient air into the case through an opening on the right side of the case, whereas - the engine and the generator are disposed on the left of the battery, - a muffler near the left side of the case in order to discharge the exhaust gas of the engine through an opening of the case, - having the engine, the generator and the muffler surrounded by an air guide wall to guide the air sucked by the fan of the radiator or by another fan fixed to the crankshaft of the engine passing the air round the generator, engine and muffler prior to being exhausted through the opening, - the gas container being loaded after opening a cap and is positioned on the left side of the case with the tip of the gas container connected to the
  • a lubricating oil feeding device for a separate lubrication type engine adapted to supply lubricating oil from the lubrication oil container to lubrication points of the engine, especially to the intake pipe of a gas engine, with the improvement to comprise an oil pump disposed in between the lubricating oil container and a lubricating oil receiving means of the engine, said oil pump discharging oil by squeezing a resilient tube forming part of the oil feeding passage between the lubricating oil container and the engine by means of a revolving squeezing means which is kept in contact with the resilient tube and is continuously driven by a drive means.
  • said oil pump is designed to form a tube pump comprising an elastic tube disposed midway of the oil feeding passage interconnecting the lubricating points of the engine with the lubricating oil container, an outer housing having a cylindrical inner surface with the elastic tube contacting the interior of the outer housing, an inner housing adapted to be rotatably supported within the outer housing, rollers mounted on the inner housing for squeezing the elastic tube extending along the interior of the outer housing and the rollers, and a drive means for rotating the innner housing.
  • Both a simplified and reliable design of the pump means can be attained through the outer housing being co-axially secured to the case of a speed reducer driven by said drive means, with said inner housing positioned within the outer housing and fixed on an output shaft of said speed reducer to be rotatable together with said output shaft.
  • said inner housing has a pulley-shaped structure supporting rotatably a pair of opposite rollers, the axes of which extend in parallel to to the axis of the inner housing, said rollers leaving a space in between to the interior of the outer housing adapted to receive a radially compressed portion of the elastic tube therein, said elastic tube being stationarily disposed between said inner and outer housings, such that both free ends of the elastic tube extend outwards of the outer housing adjacently spaced from each other to be connected to the lubricating oil tank and the intake pipe of the engine, respectively.
  • an electric motor preferably integrated with the speed reducer, or the crankshaft of the engine itself could be utilised advantageously to establish a drive means for the lubricating oil feeding device according to the present invention.
  • said electric motor, speed reducer and tube pump are assembled co-axially to form an integrated component of a lubricating oil feeding system of the engine.
  • FIGs 6 and 7 the general layout and arrangement of a separate lubrication type engine with a lubricating oil feeding device related thereto according to the present invention is shown with some details as selectively shown in Figs 1 to 4 being omitted.
  • the reference numbers 10 and 12 denote a liquid-cooled 2-cycle engine and a combination generator-starter, respectively, and both are coupled with each other through a belt system or the like. That is, when starting the engine 10, the generator 12 drives the engine as a starter motor and, after the engine is started, the generator 12 is driven by the engine 10 to generate electricity.
  • Reference numeral 14 denotes a radiator integrated with the electric fan 16; reference numeral 18 denotes a water pump driven by engine 10; reference numeral 20 denotes a coolant pressure regulator, and the coolant circulats through a hermetically sealed passage comprising a cylinder and a cylinder head of the engine 10, coolant pump 18, coolant pressure regulator 20 and radiator 14.
  • the coolant pressure regulator 20 comprises a variable-volume vessel made of an elastic material such as rubber to absorb volumetric change of the coolant caused by its temperature change.
  • Reference numeral 22 in Fig 7 denotes a box-shaped case in which are arranged the radiator 14 on the right of the vertically disposed battery 24, an electromagnetic valve 44, the coolant pressure regulator 20, and an electromotive lubricating oil pump 25 to be described in detail later, and the radiator 14 inhales the outside air into the case 22 through an opening 26 on the right side of the case 22.
  • the engine 10 and the generator 12 are disposed on the left of the battery 24.
  • the exhaust gas of the engine 10 is exhausted out of the muffler 28 near the left side of the case 22 through an opening 30 of the case 22.
  • the engine 10, generator 12 and the muffler 28 are surrounded by an air guide wall 32, and the air in the case 22 is introduced within this air guide wall 32 by an air fan 34 fastened on the crankshaft of the engine 10.
  • Reference numeral 36 denotes a gas bomb and contains liquefied butane gas or liquefied propane gas.
  • This bomb 36 is loaded after opening the cap 38 positioned on the left side of the case 22. When loaded, the tip of the bomb 36 is connected to the receptacle 40.
  • This receptacle 40 is incorporated with a pressure regulator 41 and a fuel cock 42, and the fuel after passing through this receptacle 40 is supplied into the intake pipe of the engine 10 through an electromagnetic valve 44 (Fig 6).
  • a gas pressure detecting means integrated into the receptacle 40 of the gas container 36 is provided and a heating means is associated to the gas container in order to increase the internal gas pressure of the gas container upon detecting a pressure drop therein below a predetermined level.
  • Reference numeral 46 denotes a cartridge type lubricating oil tank which is loaded after opening a cap 48 positioned on the right side of the case 22. When this tank 46 is loaded, its tip is connected to another receptacle 50. The lubricating oil is supplied from this other receptacle 50 into the intake pipe of the engine 10 through the oil pump 25.
  • This pump is usually called a tube pump and comprises an electric motor 54, a speed reducer 56 is integrated with this motor 54, a cylindrical outer housing 58 is fastened on the case of the speed reducer 56, an inner housing 60 is positioned within this outer housing 58 and mounted on the output shaft 56a of the speed reducer 56, a pair of rollers 60 mounted on the inner housing 60 and opposite to the inner surface of the outer housing 58, and an elastic tube 64 to be squeezed between the inner surface of the outer housing 58 and the rollers 60. Both end portions of the tube 64 are extended outward through the outer housing 58, with one connected with the receptacle 50 and the other connected with the intake pipe.
  • Reference numeral 66 denotes a pair of arcuate tube guides positioned between a pair of rollers 62 for preventing the tube from floating up from the inner surface of the outer housing 58 while not being saueezed. Alterntaively, said tube guides could be formed integral with the inner housing 60 to provide flanged grooves therein accordingly.
  • Reference numeral 68 denotes shafts for holding the rollers 62, and 70 is a bolt for fastening the inner housing 60 on the output shaft 56a of the speed reducer 56.
  • the generator 12 drives the engine 10 as a starter motor.
  • the electromagenetic valve 44 is opened and the fuel gas is supplied to the engine 10.
  • the motor 54 of the oil pump 25 is started and the inner housing 60 is rotated by the output shaft 56a of the speed reducer 56 at a low speed (e.g. 1 ⁇ 50 rpm). Therefore, the rollers 62 squeeze the tube 64 in rolling contact with it. Consequently, the lubricating oil in the tube 64 is pushed out of the tube 64 in the rolling-contact direction of the rollers 62 and is fed into the intake pipe.
  • the generator 12 ceases to function as a starter motor and begins to function as a generator as originally intended.
  • the output terminals of the generator 12 are connected to the battery 24 in parallel, and its electric power is taken out through an output receptacle 76.
  • This tube pump employed as the oil pump 25 can steadily discharge oil even if some air or minute dust particles come in it and can discharge almost without being affected by the height change of the tank 46 even if some height change occurs. Therefore, oil discharge is not affected by the lubricating system structure into which air or dust is apt to come from the pouring opening of the tank 46 when the exchangeable tank 46 is loaded or unloaded as in this embodiment.
  • the oil pump 52 is driven by an electric motor 54 in this embodiment, it may be driven by the crankshaft of the engine 10 instead of the motor 54.
  • this invention is applied to a 2-cycle engine in this embodiment, it can also be applied to a 4-cycle engine if only the engine is of a separate lubrication type like those for models. Further, this invention can be applied not only to engines fuelled by gas but also to those fuelled by gasoline or alcohol, and it is a matter of course that this invention includes these.
  • the device according to this invention feeds lubricating oil by means of a so-called tube pump which discharges oil by squeezing the tube with rollers in rolling contact with the tube, even minimal amount of oil can be fed continuously and smoothly and its operation is very stable. Since air or minute dust particles in the tube, even if some comes in, can be discharged together, its operational disorder hardly occurs and it can steadily feed oil. Further, since this pump has a strong suction force, change of the feeding amount is small even if the tank position is changed and, since this pump also has a large discharging force, change of the feeding amount does not occur even if the height of its discharge end is changed. Further, since the rollers continually squeeze the tube in this pump, it has a high oil cutoff ability and oil will never leak out even if the engine is left stopped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP89112391A 1988-07-09 1989-07-06 Gasbetriebene Zweitakt-Brennkraftmaschine Ceased EP0350796A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP17129188A JPH0299707A (ja) 1988-07-09 1988-07-09 潤滑オイル供給装置
JP171291/88 1988-07-09

Publications (2)

Publication Number Publication Date
EP0350796A2 true EP0350796A2 (de) 1990-01-17
EP0350796A3 EP0350796A3 (de) 1990-07-25

Family

ID=15920585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89112391A Ceased EP0350796A3 (de) 1988-07-09 1989-07-06 Gasbetriebene Zweitakt-Brennkraftmaschine

Country Status (2)

Country Link
EP (1) EP0350796A3 (de)
JP (1) JPH0299707A (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1280305A (fr) * 1961-02-10 1961-12-29 Auto Union Gmbh Moteur à combustion interne, de préférence à deux temps et à carburateur
DE1175489B (de) * 1960-11-12 1964-08-06 Kugelfischer G Schaefer & Co Schmieroelpumpe zur Druckoelschmierung von Brennkraftmaschinen, insbesondere Zweitakt-Leichtkraftstoff-Brennkraftmaschinen
FR1508080A (fr) * 1965-01-18 1968-01-05 Rech S Pour Applic Therapeutiq Appareil pour la préparation de dilutions successives
FR1545018A (fr) * 1967-11-17 1968-11-08 Sames Mach Electrostat Perfectionnements aux pompes à liquides
US3837433A (en) * 1973-03-05 1974-09-24 Roper Corp Lubricating system for chain saw
FR2384134A1 (fr) * 1977-03-14 1978-10-13 Extracorporeal Med Spec Pompe a fluide
GB2069063A (en) * 1980-02-04 1981-08-19 Lenton D F Improvements in peristaltic pumps
DE3243784A1 (de) * 1982-11-26 1984-05-30 Wibau Ag Schlauchpumpe, insbesondere zum foerdern von beton

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1175489B (de) * 1960-11-12 1964-08-06 Kugelfischer G Schaefer & Co Schmieroelpumpe zur Druckoelschmierung von Brennkraftmaschinen, insbesondere Zweitakt-Leichtkraftstoff-Brennkraftmaschinen
FR1280305A (fr) * 1961-02-10 1961-12-29 Auto Union Gmbh Moteur à combustion interne, de préférence à deux temps et à carburateur
FR1508080A (fr) * 1965-01-18 1968-01-05 Rech S Pour Applic Therapeutiq Appareil pour la préparation de dilutions successives
FR1545018A (fr) * 1967-11-17 1968-11-08 Sames Mach Electrostat Perfectionnements aux pompes à liquides
US3837433A (en) * 1973-03-05 1974-09-24 Roper Corp Lubricating system for chain saw
FR2384134A1 (fr) * 1977-03-14 1978-10-13 Extracorporeal Med Spec Pompe a fluide
GB2069063A (en) * 1980-02-04 1981-08-19 Lenton D F Improvements in peristaltic pumps
DE3243784A1 (de) * 1982-11-26 1984-05-30 Wibau Ag Schlauchpumpe, insbesondere zum foerdern von beton

Also Published As

Publication number Publication date
EP0350796A3 (de) 1990-07-25
JPH0299707A (ja) 1990-04-11

Similar Documents

Publication Publication Date Title
US5212952A (en) Compact power supply and lubricant affording device therefor
KR100308545B1 (ko) 윤활유공급장치및그것을포함하는휴대용엔진
US5162662A (en) Compact power supply with gas engine
US4373479A (en) Fuel system providing priming and automatic warm up
KR100452837B1 (ko) 스크롤압축기
US4403578A (en) Separate lubricating system for outboard engine
EP0306856A2 (de) Vorrichtung zur Zuführung von Startbrennstoff einer Brennkraftmaschine für eine tragbare Arbeitsmaschine
US6079392A (en) Fuel injection device for model engine
EP0350796A2 (de) Gasbetriebene Zweitakt-Brennkraftmaschine
KR100393340B1 (ko) 4사이클엔진
US4958599A (en) Cooling device for engine
US4517466A (en) Vacuum pump
TW524922B (en) Seal structure in engine body
EP2397665A1 (de) Viertakt-Motor und Arbeitsmaschine damit
JP2001263033A (ja) ハンドヘルド型四サイクルエンジンの潤滑装置
CA1238517A (en) Electrical fluid pumping device including first and second pumping portions
EP0306857A2 (de) Vorrichtung zur Zuführung von Startbrennstoff einer Brennkraftmaschine für eine tragbare Arbeitsmaschine
US6547254B2 (en) Seal structure between cylinder head and head cover in engine
JP3045898B2 (ja) スクロール圧縮機
JP2825160B2 (ja) エンジン駆動型発電機
JP5136018B2 (ja) 電動圧縮機
JPH03100395A (ja) 密閉形圧縮機
JPS62253927A (ja) 燃料噴射機関
JPH10266975A (ja) オイルポンプ
JP2003065015A (ja) 船外機における潤滑油ポンプ装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES FR IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR IT

17P Request for examination filed

Effective date: 19910125

17Q First examination report despatched

Effective date: 19911021

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19940620