EP0551504B1 - Drehschieber und dessen verwendung für die zufuhr einer flüssigkeit zur brennkammer einer brennkraftmaschine - Google Patents

Drehschieber und dessen verwendung für die zufuhr einer flüssigkeit zur brennkammer einer brennkraftmaschine Download PDF

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Publication number
EP0551504B1
EP0551504B1 EP92917739A EP92917739A EP0551504B1 EP 0551504 B1 EP0551504 B1 EP 0551504B1 EP 92917739 A EP92917739 A EP 92917739A EP 92917739 A EP92917739 A EP 92917739A EP 0551504 B1 EP0551504 B1 EP 0551504B1
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EP
European Patent Office
Prior art keywords
engine
valve
axis
plug
passage
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
EP92917739A
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English (en)
French (fr)
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EP0551504A1 (de
Inventor
Stephen Glover
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IFP Energies Nouvelles IFPEN
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IFP Energies Nouvelles IFPEN
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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
    • F01L7/021—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves with one rotary valve
    • F01L7/025—Cylindrical valves comprising radial inlet and side outlet or side inlet and radial outlet
    • 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 to an engine comprising a rotary valve for transferring a fluid between a source of fluid and a combustion chamber of an internal combustion engine; said plug comprising at least one substantially cylindrical surface and a lateral flank.
  • the prior art includes the document FR 2 559 208.
  • the present invention relates more particularly to an engine comprising at least one rotary plug for controlling the admission of gas, in particular of an air-fuel mixture into a combustion chamber of an engine, comprising an intrinsic sealing system.
  • the present invention applies to two-stroke or four-stroke internal combustion engines having one or more cylinders supplied by a gas, in particular an air-fuel mixture.
  • the distribution of a fuel mixture in the combustion chamber can be carried out by parts moving in a reciprocating movement such as valves.
  • the Applicant has protected, in patent application EP-A-0 435 730, a system of this type.
  • the performance of the engine may be limited by the injection systems with valves, in particular with regard to the control of the start and the end of the injection and the cross section of the carburetted air (oscillation problems). .
  • the bushels thus disclosed have an axis of rotation situated in a plane perpendicular to the axis of the cylinder, are pierced with a transverse channel for bringing the connecting channel and the combustion chamber into communication and are connected to means of drive allowing them to rotate as a function of the rotation speed of the engine crankshaft.
  • Sealing devices are sometimes provided for this purpose, either upstream or downstream of each plug, or in both places.
  • Patent application FR 2 559 208 relates to a plug for controlling the exhaust and / or the admission of gas from and / or to a combustion chamber to which one or more sealing members is applied.
  • the improvement envisaged in this patent consists of lubrication and refrigeration of the contact surface between the sealing member (s) and the plug.
  • the present invention provides an engine comprising a rotary valve of simple design, which does not require an additional and independent sealing member at the intake.
  • the invention relates to an engine comprising a rotary plug according to claim 1.
  • the face of the channel furthest from the longitudinal axis of the plug moves away from said axis from the inlet orifice.
  • At least one of said plug flow channels may include a fuel trapping means.
  • said fuel trapping means consists of an elbow formed by said channel and capable of retaining said fuel under the effect of the centrifugal force created by the rotation of the plug.
  • the rotary valve is intended to control the admission of an air-fuel mixture into the combustion chamber of an internal combustion engine.
  • the plug further comprises, from a certain distance from its end opposite to the combustion chamber, two channels arranged symmetrically with respect to a longitudinal plane.
  • the plug may include an axial channel intended for its cooling.
  • the plug can be mounted in a single-cylinder engine, placed at the entrance to the combustion chamber;
  • several bushels can be mounted, each in the cylinder head of a combustion chamber of a multi-cylinder engine.
  • a single axial cooling channel then preferably passes through all of the bushels.
  • one or more bushels according to the invention can be fitted to an outboard motor, their longitudinal axis (s) then being able to be vertical.
  • Figure 1 illustrates the arrangement of plugs in the case of a multi-cylinder engine.
  • the cylinders 1 (three in number in this example) each capped by a cylinder head 2 whose hemispherical bottom defines the upper part of the combustion chamber 4 which is further delimited by the walls of the cylinder 1 and by the upper part of the piston 5.
  • At each cylinder at least one injection orifice 3 provides communication between the combustion chamber 4 and at least one rotary plug 6 according to the invention.
  • the plug 6 is rotatably mounted in the cylinder head 2 and controls the distribution of a mixture compressed air and fuel in the combustion chamber 4 since it is placed between the injection orifice 3 and a conduit (not referenced) for supplying compressed air.
  • a fuel injection device 7 is preferably placed on the compressed air duct, at the inlet of the plug 6.
  • each bushel of generally cylindrical shape, comprises at least one longitudinal shaft 8 which protrudes at least on one side and comes to bear on a bearing 9.
  • the shafts 8 of the various bushels can be brought to an end at the end.
  • each shaft 8 is hollow, which allows a coolant to pass through, for example, intended to cool the interior of said plug. This function is important given the rotation speeds of the plugs.
  • a single cylindrical shaft 8 can cross all the bushels, or shaft sections can be mounted on either side of a cylindrical bushel.
  • FIG. 2 shows in more detail a plug 6 according to the invention.
  • the general shape of the plug can be cylindrical, with a longitudinal axis of rotation 10. As has been said, an axial channel 11, coincident with the axis 10 of rotation of the plug allows for example to circulate a coolant to the inside the bushel.
  • a channel 12 intended for the flow of an air mixture under pressure-fuel for example, is provided inside the plug.
  • the channel 12 is not straight, is preferably of variable section and has a first orifice or outlet orifice 121 cooperating with the combustion chamber 4 and a second orifice or inlet orifice 122, through which the mixture is introduced.
  • the inlet orifice 122 belongs to the lateral surface of the plug and is placed at a non-zero distance from the axis 10 of rotation of the plug while the outlet orifice 121 belongs to the cylindrical surface of the plug while being offset radially with respect to the inlet 122.
  • the outlet 121 is in any case placed farther from the axis 10 of rotation than the inlet 122.
  • the neutral axis or fiber 123 of the channel 12 can be substantially parallel to the axis of rotation 10 of the plug 6.
  • the fuel injector 7 opens near the inlet, inside the plug. More precisely, the injector 7 is oriented so that the axis of the jet that it generates is substantially contained in the same plane as the face 124 of the channel 12 closest to the axis 10 of the plug.
  • the wall 125 of the channel 12 furthest from the axis 10 is inclined so that it moves away from the axis 10 from the end 122 of the plug.
  • Figures 3 and 4 help to better understand the geometry of the plug at the inlet 122.
  • two channels 12 A and 12 B arranged symmetrically with respect to a longitudinal plane of the plug.
  • a larger number of channels can be provided without departing from the scope of the invention.
  • Each channel 12 and each associated injector 7 must preferably be arranged as indicated above.
  • Figure 3 which illustrates the zone into which the injector 7 enters shows the annular injection sector while in Figure 4 appears the partitioning of this sector into two zones 12 A, 12 B at the origin of the two channels. If two channels are provided, the plug will then rotate twice as fast as the engine in the case of an application to a two-stroke engine.
  • a fuel trapping means can be provided, according to the invention, downstream of the inlet 122.
  • This means can consist of a double deflection of the channel 12 which moves away then approaches the axis 10 of the plug, thus forming a "pocket” 126 that the centrifugal force contributes to filling.
  • FIGS. 5, 6 and 7 illustrate the path of the channel 12 or more precisely of the two channels 12 A and 12 B provided according to this embodiment, downstream of the inlet 122.
  • the trapping means is intended to complete and improve the seal produced at the level of the inlet 122 of the plug.
  • the end 121 of the channel 12 allows an arrival of the mixture in the axis of the orifice 3, which is known per se.
  • the rotary drive of the bushel can be achieved by any means known per se (belt, chain, sprockets, ...) so that it is controlled by the speed of the motor or a sub-multiple of this speed, depending the number of channels planned.
  • the plug is capable of entraining the fuel particles towards the interior of the channel 12.
  • the seal is completed by means of trapping the heaviest particles of the mixture.
  • This means is advantageously capable of trapping the particles before the admission phase. This means makes it possible to retain the trapped fuel and prevent it from going out to one or the other of the ends of the plug as long as the intake is closed.
  • the pressure variation allows said particles to be immediately reintroduced into the mixture and sprayed to the combustion chamber.
  • the plugs according to the invention can be aligned as shown in Figure 1 thus providing a long axial channel 11 preferably intended for the passage of a cooling fluid.
  • a single rotary drive is necessary for all of the plugs thus mounted.
  • Figures 2 to 7 show the case of a plug crossed by two channels 12, it can be envisaged without departing from the scope of the invention that the two channels meet near the end 121 opening towards the combustion chamber .
  • the plug (s) then have the same speed of rotation as the motor.
  • these can also have the shape of a convergent-divergent along their length.
  • plugs according to the invention can be made for example of aluminum, by molding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (11)

  1. Motor, der wenigstens einen Drehschieber zur Überleitung eines Fluids zwischen einer Fluidquelle und einer Brennkammer sowie wenigstens einen Injektor umfaßt, wobei der Schieber wenigstens eine im wesentlichen zylindrische Fläche, eine Seitenflanke und wenigstens einen Kanal (12) zur Überleitung des Fluids umfaßt, welcher eine Einlaßöffnung (122) und eine Auslaßöffnung (121) aufweist, dadurch gekennzeichnet, daß die Einlaßöffnung (122), die zur seitlichen Fläche des Schiebers gehört, in einem Abstand ungleich null von der Drehachse (10) des Schiebers angeordnet ist, daß die Auslaßöffnung (121), die zu der zylindrischen Fläche des Schiebers gehört, in bezug auf die Einlaßöffnung (122) radial verschoben ist und daß wenigstens ein Injektor (7) in Nähe der Einlaßöffnung (122) in das Innere des Schiebers einmündet, wobei der Injektor (7) derart angeordnet ist, daß seine Achse eine Ausrichtung nahe derjenigen der von der Drehachse (10) des Schiebers nächstgelegenen Vorderseite (124) des Kanals aufweist.
  2. Motor nach Anspruch 1, dadurch gekennzeichnet, daß sich für jeden Kanal (12), der mit einem Injektor (7) zusammenwirkt, die von der Drehachse (10) des Schiebers entfernteste Vorderseite (125) des Kanals von der Achse ausgehend von der Einlaßöffnung (122) entfernt.
  3. Motor nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß wenigstens einer der Überleitungskanäle (12) des Schiebers innerlich eine Einrichtung zum Auffangen von Kraftstoff umfaßt.
  4. Motor nach Anspruch 3, dadurch gekennzeichnet, daß die Einrichtung zum Auffangen von Kraftstoff aus einer Ausbuchtung (126) besteht, die durch den Kanal gebildet ist und geeignet ist, den Kraftstoff unter der Wirkung der durch die Drehung des Schiebers erzeugten Zentrifugalkraft zurückzuhalten.
  5. Motor nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens einer der Schieber außerdem einen axialen Kanal (11) umfaßt, der zu dessen Abkühlung bestimmt ist.
  6. Motor nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens einer der Schieber ausgehend von einem bestimmten Abstand seiner Einlaßöffnung (122) zwei Kanäle (12A, 12B), welche symmetrisch gegenüber einer Längsebene angeordnet sind, umfaßt.
  7. Motor nach einem der vorhergehenden Ansprüche, welcher eine pneumatische Einspritzung von Kraftstoff umfaßt.
  8. Motor nach einem der vorhergehenden Ansprüche, welcher einen einzigen Zylinder umfaßt.
  9. Motor nach einem der Ansprüche 1 bis 7, welcher mehrere Zylinder umfaßt und am Einlaß von jedem Zylinder einen Drehschieber umfaßt.
  10. Motor nach Anspruch 9, dadurch gekennzeichnet, daß ein einziger axialer Kanal (11) die sämtlichen Drehschieber durchquert.
  11. Motor nach einem der vorhergehenden Ansprüche von Außenbord-Typ.
EP92917739A 1991-08-02 1992-07-31 Drehschieber und dessen verwendung für die zufuhr einer flüssigkeit zur brennkammer einer brennkraftmaschine Expired - Lifetime EP0551504B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9109917 1991-08-02
FR9109917A FR2679960A1 (fr) 1991-08-02 1991-08-02 Boisseau rotatif et utilisation dudit boisseau pour le transfert d'un fluide vers une chambre de combustion d'un moteur a combustion interne.
PCT/FR1992/000757 WO1993003260A1 (fr) 1991-08-02 1992-07-31 Boisseau rotatif et utilisation dudit boisseau pour le transfert d'un fluide vers une chambre de combustion d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0551504A1 EP0551504A1 (de) 1993-07-21
EP0551504B1 true EP0551504B1 (de) 1996-10-02

Family

ID=9415916

Family Applications (1)

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EP92917739A Expired - Lifetime EP0551504B1 (de) 1991-08-02 1992-07-31 Drehschieber und dessen verwendung für die zufuhr einer flüssigkeit zur brennkammer einer brennkraftmaschine

Country Status (7)

Country Link
US (1) US5377635A (de)
EP (1) EP0551504B1 (de)
JP (1) JPH06502708A (de)
DE (1) DE69214267T2 (de)
ES (1) ES2094926T3 (de)
FR (1) FR2679960A1 (de)
WO (1) WO1993003260A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2705402B1 (fr) * 1993-05-21 1995-07-13 Inst Francais Du Petrole Boisseau rotatif amélioré.
US5579734A (en) * 1995-02-13 1996-12-03 Muth; Barry A. Rotary valve internal combustion engine
US5816203A (en) * 1995-02-13 1998-10-06 Muth; Barry A. Rotary valve internal combustion engine
US5967108A (en) 1996-09-11 1999-10-19 Kutlucinar; Iskender Rotary valve system
GB9827394D0 (en) * 1998-12-11 1999-02-03 Norton Cyril A Engines
US6513475B2 (en) 2001-04-18 2003-02-04 Barry Muth Rotary valve internal combustion engine
EP2261470A1 (de) 2009-06-08 2010-12-15 Léon Crosset Verbrennungsmotor mit sphärischem Drehventil
JP6385407B2 (ja) * 2016-09-22 2018-09-05 本田技研工業株式会社 内燃機関のロータリ式スロットル装置

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
GB293650A (en) * 1928-01-17 1928-07-12 Arthur Lionel Reeves Improvements in rotary valves for internal-combustion engines
US2158386A (en) * 1937-05-28 1939-05-16 Sykes Walter David Rotary valve for internal combustion engines
CH334777A (it) * 1956-01-25 1958-12-15 Monn Walter Dispositivo distributore a cassetto di un cilindro di motore a scoppio a quattro tempi
US3871340A (en) * 1972-10-03 1975-03-18 Tetrahedron Associates Inc Rotary valve internal combustion engine
US4007725A (en) * 1975-03-05 1977-02-15 Weaver Robert R Rotary valving unit for an internal combustion engine
US4075986A (en) * 1976-07-12 1978-02-28 Mark Keck Rotary-poppet valve internal combustion engine
US4546743A (en) * 1977-06-20 1985-10-15 Karl Eickmann Arrangements to rotary valves for engines compressors, motors or pumps
WO1983000530A1 (en) * 1981-08-01 1983-02-17 Richard Furneaux Kinnersly Internal combustion engine and rotary valve member therefor
US5081966A (en) * 1984-11-15 1992-01-21 Hansen Engine Corporation Internal combustion engine with rotary valve assembly
IT1217060B (it) * 1987-04-30 1990-03-14 Montagni Alviero Dispositivo di distribuzione per macchine volumetriche alternative, come motori alternativi endotermici con valvola ruotante a forma di solido di rivoluzione in specie sferica.
CA1292702C (en) * 1989-06-23 1991-12-03 George Ristin Rotary valve with facility for stratified combustion in the internal combustionengine
FR2662214B1 (fr) * 1990-05-21 1994-07-22 Inst Francais Du Petrole Moteur a deux temps a injection pneumatique de carburant et a commande d'injection par un boisseau rotatif.
GB9013788D0 (en) * 1990-06-20 1990-08-08 Lotus Group Plc Internal combustion engine and an improved rotary inlet valve for use therewith
US5052349A (en) * 1990-07-30 1991-10-01 Terry Buelna Rotary valve for internal combustion engine

Also Published As

Publication number Publication date
EP0551504A1 (de) 1993-07-21
FR2679960A1 (fr) 1993-02-05
DE69214267D1 (de) 1996-11-07
FR2679960B1 (de) 1995-04-28
DE69214267T2 (de) 1997-02-20
WO1993003260A1 (fr) 1993-02-18
US5377635A (en) 1995-01-03
ES2094926T3 (es) 1997-02-01
JPH06502708A (ja) 1994-03-24

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