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WO1996032569A1 - Tiroir de rotation pour moteur thermique - Google Patents

Tiroir de rotation pour moteur thermique Download PDF

Info

Publication number
WO1996032569A1
WO1996032569A1 PCT/AU1995/000605 AU9500605W WO9632569A1 WO 1996032569 A1 WO1996032569 A1 WO 1996032569A1 AU 9500605 W AU9500605 W AU 9500605W WO 9632569 A1 WO9632569 A1 WO 9632569A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
rotary valve
seal
cylinder
port
Prior art date
Application number
PCT/AU1995/000605
Other languages
English (en)
Inventor
John Douglas Ramsey
Original Assignee
John Douglas Ramsey
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 John Douglas Ramsey filed Critical John Douglas Ramsey
Priority to AU35571/95A priority Critical patent/AU696388B2/en
Publication of WO1996032569A1 publication Critical patent/WO1996032569A1/fr

Links

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
    • F01L7/023—Cylindrical valves having a hollow or partly hollow body allowing axial inlet or exhaust fluid circulation
    • 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

  • This invention relates to a rotary valve for an internal combustion engine.
  • Rotary valves for internal combustion engines have been know for many years to replace the use of poppet valves.
  • Poppet valves operate in a reciprocatory action and while they are mechanically opened by a cam or a cam operated pushrod through rockers, each has to be closed by a spring.
  • stronger springs are used, and even double springs have been used in an attempt to prevent valve bounce.
  • the valve has to open against the action of the spring or springs, and this necessarily requires a substantial force to do so resulting in a virtual power waste of the engine.
  • a rotary valve requires little power to rotate the valve, however problems have arisen with prior art valves in sealing of the valve to the port opening into the cylinder. Also the valve must have an adequate cooling arrangement, particularly for the portion of the valve controlling the exhaust gases.
  • Rotary valves are known to be used on racing motor cycle engines, but these have been known to be restricted to the use of the valve on a single cylinder engine.
  • AU591052 discloses a rotary valve having means to overcome the thrust on the valve due to the large pressures developed in the cylinder of the engine, and is also directed to the lubrication of the rotating valve.
  • US4,949,685 discloses an internal combustion engine having a pair of rotary tube valves for each head. Each hollow valve has a slot to co-operate with a port in the cylinder head, one end of each tube valve being closed, and the other end connected to a machined port in the head which port is connected to either a carburettor or to exhaust.
  • a ceramic seal is provided around the ports to the cylinder, the seals having a wave spring to maintain sealing pressure.
  • US4,879,979 also discloses a rotary valve for an internal combustion engine, the rotary valve including a hollow shaft which is water cooled.
  • AU68942/87 is directed to a rotary valve for an internal combustion engine having a hollow cylindrical rotor having along its bore an inclined integral baffle with ports on either side of the baffle arranged to be brought into communication with a port as the rotor rotates.
  • the rotor is supported in roller bearings, and has longitudinal sealing strips co-operating with sealing strips to seal around the ports.
  • GB2.211 ,549 describes a rotary valve for an engine, the rotary valve having circumferentially extending grooves along its length.
  • the ports open into channels which open into ducts which communicate with ports in the cylinders of the engine.
  • AU59304/90 also discloses a rotary valve mechanism having at least one gas port passing through its cylindrical surface.
  • a valve housing surrounds the rotary valve and has a longitudinal slit in its circumference and defines a gas port to pass gas between the rotor and the combustion chamber.
  • a seal is also described between the valve housing and the cylinder head.
  • the prior art shows that either there is a separate rotary valve for each cylinder, or where a single valve is provided for a plurality of cylinders, the valve has radial or diametrical ports opening to a manifold on one side of the valve to a port to the cylinder on the other side of the valve.
  • a rotary valve for a multi- cylinder internal combustion engine having at least two in-line cylinders, the rotary valve having a rotor rotatable in a split housing, the fixed portion of the housing having inlet and outlet ports communication respectively with each combustion chamber, said rotor having a first spiral channel extending from one end to terminate adjacent the other end, and a second spiral channel extending from said other end to terminate adjacent said one end, one of said channels communicating in sequence with said inlet ports, and the other of said channels communicating in sequence with said exhaust ports, and sealing means between said rotor and each of said ports.
  • a rotary valve for an internal combustion engine having a piston operating in a cylinder formed in a block, said rotary valve having a rotor rotatable in a housing, passage means in said rotor providing inlet and exhaust passages sequentially opening to said cylinder, characterised by a seal between said rotor and said cylinder, said seal having a first end and a second end, said first end sealing against the rotor surface, said first end having a first area subject to cylinder pressure, and said second end having second area subject to cylinder pressure, said first and second areas being so chosen that the seal is balanced or substantially balanced under cylinder pressure.
  • the seal is spring loaded to be biased into contact with said rotor by a spring acting between the seal and the block.
  • Figure 1 is a side view of the invention as applied to an engine having a bank of 4 cylinders
  • Figure 2 is an end view of the invention as shown in Figure 1 .
  • Figure 3 is a side and end view to an enlarged scale of the sealing between the rotor and port in the cylinder head.
  • a reciprocating engine having four cylinders, with a head 2 being of split construction having a base 3 and an upper portion 4.
  • the head is provided a cylindrical bore 5 containing a valve rotor 6 the rotor being mounted in bearings 7 in the head.
  • the rotor is effectively mounted in a split housing formed by the two portions 3 and 4 of the head 2.
  • the rotor is provided with two spiral channels, inlet spiral channel 10 and outlet spiral channel 11 , with inlet ports 8 and exhaust ports 9 respectively through the surface of the rotor in alignment with each cylinder to respectively alternately communicate with a cylinder port 25 formed in the base portion 3 of the head.
  • a cylinder port 25 formed in the base portion 3 of the head.
  • the cylinder port 25 is basically square or rectangular in shape and the ports 8 and 9 are elongated along the respective spiral in a general polygonal shape and thus match the cylinder port 25 to thus provide adequate valve opening time.
  • Spiral 10 opens to one end 12 of the rotor, this end being connected to a carburettor or to air if the engine is fuel injected, the spiral 10 thus forming the inlet spiral for the engine.
  • the other spiral 11 opens to the other end 13 of the rotor, this end being connected to the exhaust system of the engine so that the spiral 11 forms the exhaust passage for the engine.
  • the rotor is driven by a drive 14 which may be a chain, lugged belt or spur or bevel gear train from the crankshaft of the engine. It is to be noted that the rotor is driven at one half crankshaft engine speed for a four stroke engine.
  • the spirals are spaced circumferentially around the rotor, the spacing being such that each spiral opens to its respective cylinder port 25 in each respective cylinder in the correct sequence.
  • the ports 8 and 9 are also so arranged that there is the required degree of overlap in the ports opening into the cylinder port 25, the leading edge of the inlet port 8 connecting to the cylinder port 25 before the trailing edge of the outlet port 9 leaves the cylinder port 25.
  • the cooling of the rotor is provided by a cooling jacket 15, the jacket 15 being provided in the rotor thus surrounding the exhaust and inlet passages.
  • the upper portion of the head 4 has an inlet 16 and an outlet 17 connecting to openings in the rotor to connect to the jacket 15.
  • Incorporated in the rotor there are turbines 18 to circulate the cooling fluid through the rotor.
  • the turbines can be used as the water pump for circulating the cooling fluid, so that a separate drive for the water pump is not required.
  • Lubrication of the rotor is provided by a plurality of oil injectors 19 spaced along the length of the base upper portion of the head. The number of oil injectors will vary depending on the length of the rotor, i.e.
  • an oil scrapers 20 extending along the length of the rotor so that excess lubrication can be removed through line 26.
  • Seals 27 are provided in the housing to seal against the rotor. These seals 27 are positioned between the exhaust ports along the rotor to prevent exhaust gasses creeping along the rotor between the rotor and the housing.
  • these seals are heat resisting and low friction seals such as of the silicon and PTFE type.
  • a spark plug 21 is shown extending through the head base 3 into the upper portion of the cylinder of the engine.
  • a fuel injector 28 On the opposite of the head base there is shown a fuel injector 28.
  • the fuel injector is preferably inserted into the head base 3 with a thread identical to the spark plug thread, so that if there is single point injection or a carburettor, twin spark plugs can be utilised.
  • Figure 3 shows an example of the form of seal that can be used to seal the head port against the rotor during operation of the engine.
  • the seal member 22 can be of any suitable material, such as aluminium and carbon composition hardened steel, or any suitable steel alloy, or ceramic material if desired.
  • the seal is provided with a wave spring 23 under a shoulder of the seal, and an O ring seal 24 prevents leakage between the seal and the passage forming the port in the base 3. It has been calculated that due to the stepped nature of the seal that if the area of the base of the seal is equal to the area of the stepped flange, then there will be no added force on the rotor other than that provided by the wave spring. In this way there is a simple and effective seal by preloading only.
  • a rotary valve for a multicylinder combustion engine the single valve controlling both the inlet and exhaust passages of each cylinder. Also there is provided a seal between the rotary valve and the cylinder of the engine which seal does not apply heavy loading on the rotary valve during the combustion process. Also the invention provides a means for cooling the valve during operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

Tiroir de rotation pour moteur thermique comportant un rotor dans un carter en deux parties (3, 4), une partie (3) dudit carter (3, 4) formant la culasse (2) du moteur. Le rotor comporte une paire de passages en spirale (10, 11) dont chacun s'ouvre successivement sur un conduit (25) unique débouchant dans le cylindre du moteur. Un joint d'étanchéité (22) est décrit dans le conduit (25), ledit joint (22) fermant hermétiquement sur le rotor et étant équilibré par la pression du cylindre exercée sur chaque extrémité du joint d'étanchéité (22).
PCT/AU1995/000605 1995-04-10 1995-09-15 Tiroir de rotation pour moteur thermique WO1996032569A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU35571/95A AU696388B2 (en) 1995-04-10 1995-09-15 Rotary valve for internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN2258 1995-04-10
AUPN2258A AUPN225895A0 (en) 1995-04-10 1995-04-10 Rotary valve for internal combustion engine

Publications (1)

Publication Number Publication Date
WO1996032569A1 true WO1996032569A1 (fr) 1996-10-17

Family

ID=3786610

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1995/000605 WO1996032569A1 (fr) 1995-04-10 1995-09-15 Tiroir de rotation pour moteur thermique

Country Status (2)

Country Link
AU (1) AUPN225895A0 (fr)
WO (1) WO1996032569A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR1002891B (el) * 1997-04-11 1998-04-10 Καπακι μηχανης εσωτερικης καυσεως χωρις βαλβιδες και τα συνακολουθα
WO2005005789A1 (fr) * 2003-07-10 2005-01-20 The Ramsey Valve Company Pty Ltd Distributeur rotatif pour moteurs a combustion interne
WO2005005790A1 (fr) * 2003-07-11 2005-01-20 The Ramsey Valve Company Pty Ltd Valve rotative pour moteurs a combustion interne
WO2006024082A3 (fr) * 2004-09-01 2006-08-31 Bishop Innovation Ltd Moteur a combustion interne a soupape rotative
AU2005279691B2 (en) * 2004-09-01 2009-01-22 Bishop Innovation Limited Internal combustion engine with rotary valve
ITUB20153183A1 (it) * 2015-08-06 2017-02-06 Herta Pfeifer Sistema di distribuzione per motori alimentati a vapore

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1380435A (en) * 1917-02-16 1921-06-07 Strebel Louis Motor-valve
US1402616A (en) * 1918-04-22 1922-01-03 Charles W Jackman Rotary valve
FR582230A (fr) * 1924-03-28 1924-12-15 Trommel à cloison hélicoïdale formant mécanisme de distribution pour moteurs à explosion
AU257437A (en) * 1937-06-22 1938-07-07 Stanley McLaren High An improved rotary valve internal combustion engine
FR962533A (fr) * 1950-06-14
US4778148A (en) * 1986-06-25 1988-10-18 Volkswagen Ag Sealing arrangement for a rotary slide valve
US4794895A (en) * 1986-06-25 1989-01-03 Volkswagen Ag Sealing arrangement for a rotary slide valve

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR962533A (fr) * 1950-06-14
US1380435A (en) * 1917-02-16 1921-06-07 Strebel Louis Motor-valve
US1402616A (en) * 1918-04-22 1922-01-03 Charles W Jackman Rotary valve
FR582230A (fr) * 1924-03-28 1924-12-15 Trommel à cloison hélicoïdale formant mécanisme de distribution pour moteurs à explosion
AU257437A (en) * 1937-06-22 1938-07-07 Stanley McLaren High An improved rotary valve internal combustion engine
AU1784756A (en) * 1956-04-30 1957-10-17 George Dunstan David An improved rotary valve for engines
US4778148A (en) * 1986-06-25 1988-10-18 Volkswagen Ag Sealing arrangement for a rotary slide valve
US4794895A (en) * 1986-06-25 1989-01-03 Volkswagen Ag Sealing arrangement for a rotary slide valve

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR1002891B (el) * 1997-04-11 1998-04-10 Καπακι μηχανης εσωτερικης καυσεως χωρις βαλβιδες και τα συνακολουθα
WO1998046865A1 (fr) * 1997-04-11 1998-10-22 Athanasios Dimitropoulos Culasse pour moteur a combustion interne avec tiroirs rotatifs
WO2005005789A1 (fr) * 2003-07-10 2005-01-20 The Ramsey Valve Company Pty Ltd Distributeur rotatif pour moteurs a combustion interne
WO2005005790A1 (fr) * 2003-07-11 2005-01-20 The Ramsey Valve Company Pty Ltd Valve rotative pour moteurs a combustion interne
WO2006024082A3 (fr) * 2004-09-01 2006-08-31 Bishop Innovation Ltd Moteur a combustion interne a soupape rotative
AU2005279691B2 (en) * 2004-09-01 2009-01-22 Bishop Innovation Limited Internal combustion engine with rotary valve
US7584741B2 (en) 2004-09-01 2009-09-08 Bishop Innovation Limited Internal combustion engine with rotary valve
ITUB20153183A1 (it) * 2015-08-06 2017-02-06 Herta Pfeifer Sistema di distribuzione per motori alimentati a vapore

Also Published As

Publication number Publication date
AUPN225895A0 (en) 1995-05-04

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