EP0258511A1 - Moteur à combustion interne à distributeur rotatif - Google Patents

Moteur à combustion interne à distributeur rotatif Download PDF

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Publication number
EP0258511A1
EP0258511A1 EP86307613A EP86307613A EP0258511A1 EP 0258511 A1 EP0258511 A1 EP 0258511A1 EP 86307613 A EP86307613 A EP 86307613A EP 86307613 A EP86307613 A EP 86307613A EP 0258511 A1 EP0258511 A1 EP 0258511A1
Authority
EP
European Patent Office
Prior art keywords
valve
exhaust
internal combustion
intake
combustion engine
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.)
Withdrawn
Application number
EP86307613A
Other languages
German (de)
English (en)
Inventor
Nobuo Harada
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.)
Ss Ltd KK
Original Assignee
Ss Ltd KK
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 Ss Ltd KK filed Critical Ss Ltd KK
Publication of EP0258511A1 publication Critical patent/EP0258511A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/02—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves
    • F01L7/026—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves with two or more rotary valves, their rotational axes being parallel, e.g. 4-stroke
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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 present invention relates generally to internal combustion engines and more particularly to improvements in and relating to the valve installation of four cycle or four-stroke engine which draws fuel mixture into the combustion chamber of the engine and discharges the combustion exhaust gases from the combustion chamber.
  • the intake and exhaust valve gear of its combustion chamber is generally constructed to operate mushroom type poppet valves by the rotation of an engine crankshaft through cams, tappets, followers, etc., and the use of a large number of such component parts not only complicates the construction and increases the weight (with resulting increases in cost) but also increases the power loss due to the operation of these parts. Also, since the intake and exhaust mushroom type poppet valves are each opened and closed against a coiled spring, heavy vibrations and noise are caused and therefore there is a limitation to the maximum rotation speed of the engine.
  • valve mechanism is disadvantageous in that the sliding resistance to the rotation of the disc is increased by the negative pressure acting on the disc.
  • a four-cycle internal combustion engine having at least one cylinder in which an intake valve and an exhaust valve are arranged in a cylinder head closing a combustion chamber of the engine, the intake valve and the exhaust valve being driven by the rotation of an output shaft rotated by a piston
  • the intake valve comprises a first rotary valve member of generally cylindrical shaft shape, the valve member being rotatable about its own axis in the cylinder head so as to open periodically to conduct a fuel mixture into the combustion chamber
  • the exhaust valve comprises a second rotary valve member of generally cylindrical shaft shape, the valve member being rotatable about its own axis in the cylinder head so as to open periodically to conduct exhaust gases from the combustion chamber; the first and second valve members being rotated by the rotation of the output shaft.
  • each of the valve members includes an axial inner passage opening to one axial end thereof and an opening connecting the outer surface of each valve member with its inner passage.
  • the passages each extend to midway along the valve members and the openings are at mid positions along the valve members.
  • the rotation is transmitted from the output shaft to the valve members by means of gears attached to the closed ends of the valve members.
  • the valve members each include a pair of peripheral grooves on the axial sides of the hole opening to the outer surface, and a sealing O-ring fitted into each of the peripheral groves.
  • Each valve member preferably also includes a pair of axial grooves on the circumferential sides of the hole in the outer surface, and a sealing member fitted in each of the axial grooves.
  • the camshaft, tappets, push rods, rocker arms, intake and exhaust mushroom type poppet valves and coiled springs required by a conventional intake and exhaust valve system are eliminated and it is only necessary to mount cylindrical shaft-type intake and exhaust valves in the cylinder head. This may not only greatly simplify the construction, reduce the weight and decrease production cost, but may also reduce the power losses inherent in the operation of the conventional parts.
  • a conventional four-stroke petrol engine usually employs an intake and exhaust valve system including a camshaft gear 82 driven by a crankshaft 81, a camshaft 83 connected to the gear 82 and having two cams for each cylinder 90, two push rods 85 and 85a respectively having tappets 84 and 84a and moved vertically by the cams, and rocker arms 86 and 86a located above a cylindrical head 91.
  • the rocker arms 86 and 86a are arranged in such a manner that one of their ends in each case is moved by the push rods 85 and 85a to make rocking motion so that intake and exhaust mushroom type poppet valves 87 and 87a are respectively driven by the other ends of the rocker arms 86 and 86a.
  • Two coiled springs are employed 88 and 88a to urge the poppet valves 87 and 87a against their valve seats whereby, in dependence upon the position of the piston 92, the poppet valves 87 and 87a are opened and closed so that the combustible gas is drawn into the cylinder 90 from the carburettor through the poppet valve 87 and the exhaust gases are discharged from the cylinder 90 through the poppet valve 87a.
  • the engine comprises a cylinder 1, a piston 2, a cylinder head 3 made for example of an aluminium alloy, a combustion chamber 31, a plug hole 32, and cylindrical openings 33, 34 formed above the combustion chamber 31 on each side whose inner surfaces have a sprayed chromium plating, or a ceramic coating or the like.
  • the openings 33 and 34 communicate with the combustion chamber 31 through an intake passage 35 and an exhaust passage 36, respectively.
  • a rotary intake valve comprising a valve body 41 composed of a bottomed cylindrical shaft made for example of phosphor bronze.
  • the valve body 41 has an axial intake passage 42 extending from one end up to about the mid portion and an intake port 43 is formed at the inner forward end of the passage 42 to open to the outer surface of the body 41.
  • a pair of peripheral grooves 44 and 44a are formed in the shaft outer surface on each side axially of the intake port 43 and O-rings 45 and 45a are respectively fitted in the grooves 44 and 44a.
  • straight grooves 46 and 46a are formed in the shaft outer surface on each side circumferentially of the intake port 43 to extend axially between the peripheral grooves 44 and 44a and key-shaped sealing members 47 and 47a for hermetic sealing purposes are respectively fitted in the straight grooves 46 and 46a.
  • a flange 48 is formed at one end of the body 1.
  • the intake valve 4 is rotatably located in the opening 33 in the cylinder head 3 and oil sealing is provided for the ends on the outside of the peripheral grooves 44 and 44a.
  • the tolerances of the opening 33 and the valve 4 are in the range of 0.02 to 0.05mm.
  • the intake port 43 is hermetically sealed by the O-rings 45 and 45b and the sealing members 47 and 47b.
  • a gear 6 is fixedly mounted on the flange 48.
  • the intake valve 4 is open and is slidably pressed against the end face of a bracket 7 which has an opening 71 aligned with the intake passage 42 and a carburettor mounting flange and which is fixedly mounted on the cylinder head 3.
  • a rotary exhaust valve 5 is identical in construction with the intake valve 4 is rotatably fitted in the opening 34. Also, a gear 6a is fixedly mounted on a flange 58 of the exhaust valve 5 whose other end is slidably pressed against the end face of a mounting portion 81 of an exhaust pipe or manifold 8 which is attached to the cylinder head 3.
  • the gear 6 of the intake valve 4 and the gear 6a of the exhaust valve 5 are connected to a gear 10 driven by a crankshaft 9 through transmitting means (not shown) such as gears, chains or sprocket belts so that they are rotated at one-half the speed of the crankshaft 9.
  • transmitting means such as gears, chains or sprocket belts so that they are rotated at one-half the speed of the crankshaft 9.
  • FIGURE 4a shows a condition in which the piston 2 is about to start moving downwards from top dead centre on the exhaust stroke and the intake port 43 of the intake valve 4 and the exhaust port 53 of the exhaust port 5 are opened slightly to the combustion chamber 31.
  • the intake and exhaust valves 4 and 5 are rotated in the direction of the arrows.
  • the intake port 43 is open to the cylinder 1 allowing fuel mixture to be drawn in and the exhaust port 53 is closed to the cylinder 1.
  • the intake valve 4 When the piston 2 moves upwards on its compression stroke, the intake valve 4 is also closed so that when the piston 2 reaches top dead centre again, the intake port 43 of the intake valve 4 is positioned away from the combustion chamber and the exhaust port 53 of the exhaust valve 5 has moved closer to the combustion chamber 31 thus blocking the combustion chamber 31 as shown in FIGURE 4c.
  • the intake valve 4 When the combustible gas is ignited to explode and the energy causes the piston 2 to move downwards to reach bottom dead centre as shown in FIGURE 4d, the intake valve 4 remains closed, while the exhaust port 53 of the exhaust valve 5 begins to open to the combustion chamber 31. The opening area is increased as the piston 2 moves upwards thereby discharging the exhaust gases in the cylinder 1 into the exhaust pipe 8 through the exhaust passage 52.
  • the timing of the opening and closing of the intake valve 4 and the exhaust valve 5 is the same as the timing of opening and closing of intake and exhaust mushroom type poppet valves in the conventional gasoline engine shown in FIGURE 6, the timing may be adjusted to some extent by changing the shape of the intake port 43 and the exhaust port 53.
  • a chromium-type sprayed plating, ceramic coating or the like is applied to the inner surface of the openings 33 and 34 formed in the cylinder head 3, however, separate sleeves made of a bearing material may be force fitted or alternatively sliding bearings may be provided.
  • FIGURE 5 it is only necessary to arrange, at the sides of cylinders 1a to 1n, intake and exhaust valves 4a and 5a respectively comprising long cylindrical shaft bodies 41a and 51a respectively formed with intake ports 43a to 43n and exhaust ports 53a to 53n which are shifted in phase relative to each other in accordance with the firing order of the cylinders 1a to 1n.
  • the bodies 41a and 51a would then be supported by bearings and would have one of their ends connected to a carburettor in each case and the other to an exhaust manifold.
  • the intake valve and the exhaust valve are rotated in the same direction, however, they may be rotated in the opposite directions.
  • the carburettor and the exhaust pipe may be connected between the intake valve 4 and the exhaust valve 5.
  • the invention is applied to a petrol or gasoline engine, the invention can be equally applied to the exhaust valves of a Diesel engine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
EP86307613A 1986-05-09 1986-10-02 Moteur à combustion interne à distributeur rotatif Withdrawn EP0258511A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP104939/86 1986-05-09
JP10493986A JPS62261615A (ja) 1986-05-09 1986-05-09 内燃機関

Publications (1)

Publication Number Publication Date
EP0258511A1 true EP0258511A1 (fr) 1988-03-09

Family

ID=14394061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86307613A Withdrawn EP0258511A1 (fr) 1986-05-09 1986-10-02 Moteur à combustion interne à distributeur rotatif

Country Status (3)

Country Link
EP (1) EP0258511A1 (fr)
JP (1) JPS62261615A (fr)
CN (1) CN86106493A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997011261A1 (fr) * 1995-09-22 1997-03-27 Brian Smith Soupape rotative pour moteur a combustion interne
WO1997035098A1 (fr) * 1996-03-15 1997-09-25 Los Rios Sanz Jose Manuel De Culasse amelioree avec soupape rotative et flux entierement rectiligne
EP1503049A1 (fr) * 2003-07-31 2005-02-02 Mario Brighigna Moteur à combustion avec soupape à tiroir rotatif
WO2016144281A1 (fr) * 2015-03-11 2016-09-15 Михаил Анатольевич КУДРЯШОВ Tiroir de soupape
IT201700050447A1 (it) * 2017-05-10 2018-11-10 Giuseppe Galasi Dispositivo di distribuzione per motori a combustione interna chiamato "distribuzione rotante"

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04287811A (ja) * 1991-03-14 1992-10-13 Fine Parts:Kk 自動車等のエンジンの吸・排気機構
JPH04350312A (ja) * 1991-05-08 1992-12-04 Daiyuu Paint Kk エンジンの吸排気装置
US10161312B2 (en) 2012-11-02 2018-12-25 General Electric Company System and method for diffusion combustion with fuel-diluent mixing in a stoichiometric exhaust gas recirculation gas turbine system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR402246A (fr) * 1909-04-20 1909-10-01 Justin Segond Moteur à combustion interne avec distributeurs rotatifs
US1398354A (en) * 1921-11-29 wright
FR611576A (fr) * 1926-02-22 1926-10-01 Distribution perfectionnée sans soupapes pour moteurs à explosions ou à combustion interne
FR1461493A (fr) * 1965-09-20 1966-12-09 Moteur sans soupapes à distribution rotative
CH471317A (de) * 1968-09-13 1969-04-15 August Dr Monath Kolbenmaschine
DE3422826A1 (de) * 1984-06-20 1984-12-20 Warzecha, Frank, 4330 Mühlheim Steuerung einer brennkraftmaschine durch drehschieber

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1398354A (en) * 1921-11-29 wright
FR402246A (fr) * 1909-04-20 1909-10-01 Justin Segond Moteur à combustion interne avec distributeurs rotatifs
FR611576A (fr) * 1926-02-22 1926-10-01 Distribution perfectionnée sans soupapes pour moteurs à explosions ou à combustion interne
FR1461493A (fr) * 1965-09-20 1966-12-09 Moteur sans soupapes à distribution rotative
CH471317A (de) * 1968-09-13 1969-04-15 August Dr Monath Kolbenmaschine
DE3422826A1 (de) * 1984-06-20 1984-12-20 Warzecha, Frank, 4330 Mühlheim Steuerung einer brennkraftmaschine durch drehschieber

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997011261A1 (fr) * 1995-09-22 1997-03-27 Brian Smith Soupape rotative pour moteur a combustion interne
US5941206A (en) * 1995-09-22 1999-08-24 Smith; Brian Rotary valve for internal combustion engine
WO1997035098A1 (fr) * 1996-03-15 1997-09-25 Los Rios Sanz Jose Manuel De Culasse amelioree avec soupape rotative et flux entierement rectiligne
EP1503049A1 (fr) * 2003-07-31 2005-02-02 Mario Brighigna Moteur à combustion avec soupape à tiroir rotatif
WO2016144281A1 (fr) * 2015-03-11 2016-09-15 Михаил Анатольевич КУДРЯШОВ Tiroir de soupape
IT201700050447A1 (it) * 2017-05-10 2018-11-10 Giuseppe Galasi Dispositivo di distribuzione per motori a combustione interna chiamato "distribuzione rotante"

Also Published As

Publication number Publication date
JPS62261615A (ja) 1987-11-13
CN86106493A (zh) 1987-12-02

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Inventor name: HARADA, NOBUO