EP0454627A2 - Motor mit doppelt wirkendem Kolben und ohne Pleuel - Google Patents

Motor mit doppelt wirkendem Kolben und ohne Pleuel Download PDF

Info

Publication number
EP0454627A2
EP0454627A2 EP91830048A EP91830048A EP0454627A2 EP 0454627 A2 EP0454627 A2 EP 0454627A2 EP 91830048 A EP91830048 A EP 91830048A EP 91830048 A EP91830048 A EP 91830048A EP 0454627 A2 EP0454627 A2 EP 0454627A2
Authority
EP
European Patent Office
Prior art keywords
piston
internal combustion
combustion engine
cylinder
engine according
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Withdrawn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
EP91830048A
Other languages
English (en)
French (fr)
Other versions
EP0454627A3 (en
Inventor
Paolo Lombardi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0454627A2 publication Critical patent/EP0454627A2/de
Publication of EP0454627A3 publication Critical patent/EP0454627A3/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • F02B75/002—Double acting engines
    • 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

Definitions

  • the invention refers to an internal combustion engine comprising a crankcase, a cylinder, a piston reciprocatingly slidable in said cylinder, an output shaft and means for transforming the reciprocating motion of the piston into a rotating motion of the output shaft.
  • Known engines of this type are provided with a connecting rod hinged at one end to the piston by means of a pin.
  • the other end of the connecting rod is hinged to a crank which is part of the engine output shaft.
  • These members transform the reciprocating motion of the piston into a rotary motion of the output shaft.
  • the arrangement is such that enormous side thrusts are exerted by the piston in the cylinder. This calls for heavy oversizing of the engine members. On the other hand, this causes an increase of the forces of inertia acting on the moving parts of the engine.
  • hypocycloid gear transmission which connects the piston to the shaft.
  • the hypocycloid gear transmission is known per se, and is described for example by I. Artobolevski "Lesnewestes dans la technique Butter", Moscow 1976, vol.3, page 143. This known kinematic mechanism, however, has never been applied in internal combustion engines having a reciprocating moving piston.
  • the hypocycloid gear transmission comprises a first externally toothed gear meshing with a second internally toothed gear.
  • Said second internally toothed gear has a pitch diameter which is twice the pitch diameter of the first externally toothed gear, and the first toothed gear is solid with a pin supported by said piston, while the second internally toothed gear is solid with the crankcase of the engine.
  • the present invention makes it possible to use double-acting pistons in usual internal combustion engines.
  • Such solution exhibits many advantages with respect to the currently known internal combustion engines, in which the piston reciprocating motion is transformed into rotary motion by known connecting rod assemblies. Among these, the following advantages should be pointed out:
  • the mechanism is essentially made up of a cylinder 21 having two opposite heads 20 for a double-acting operation.
  • a body 1 constituting a double-acting piston having two crowns 1C and a joining skirt 1A, which delimits a piston-lightening cavity 1D.
  • Said skirt 1A is provided with two opposite apertures 1B.
  • the cylinder is provided with two opposite longitudinal slots 21B which correspond to the apertures 1B in the piston skirt 1A.
  • the double-acting piston 1 has a bush 2 supported within the cavity 1D.
  • a roller or bushing bearing 3 is mounted, which supports a pin 4.
  • the pin 4 is provided with two opposite end portions on which opposite externally toothed gears 5 are solid. The axes of the gears 5 are aligned to each other but out of alignment with respect to the central portion of the pin 4, i.e. the portion supported in bearing 3.
  • each externally toothed gear 5 meshes with a relevant internally toothed gear 6.
  • the pitch diameter (and thus the number of teeth) of each internally toothed gear 6 is twice the pitch diameter (and the number of teeth) of the relevant externally toothed gear 5.
  • Each internally toothed gear 6 is solid with the crankcase 7 of the engine.
  • Each externally toothed gear 5 is provided with a pin 8, which is coaxial to the relevant gear 5 and projects outwardly, i.e. opposite the piston 1.
  • Each pin 8 is fitted to a flange or small flywheel 10 which is solid with a shaft 11 of the engine, a bearing 9 being provided to support said pin 8.
  • the pin 4 may be formed into two parts mostly mating in correspondence of the bush 2.
  • the pin 4 goes through the apertures 1B and the slots 21B to support the gears 5 outwardly of cylinder 21 and into meshing engagement with the internally toothed gear 6.
  • the functioning of the engine is the following:
  • the double-acting piston 1 moves with a reciprocating motion within cylinder 21, while the two chambers formed between the cylinder heads 20 and the relevant piston crowns 1C serves alternatively as compression and expansion chambers for the air-fuel mixture.
  • the bush 2 is also moved with a reciprocating motion along the cylinder axis.
  • the reciprocating motion of the central portion of pin 4 causes the externally toothed gears 5 to roll along the relevant internally toothed gears 6.
  • the axis of each externally toothed gear 5 is thus made to rotate around the axis of the engine shaft 11.
  • the link between gear 5 and shaft 11 obtained by pin 8 and flywheel 10 transmits the rotation of the gear 5 around the axis shaft 11 to the engine shaft 11 itself.
  • the piston moves with harmonic motion, and there are no side thrusts nor concomitant 2nd-degree forces of inertia.
  • the pin 4 which drives into rotation the engine shaft 11 is acted upon only by the useful power, while the power required for the compression of the mixture into the opposite compression chamber is transmitted directly by the same piston.
  • the piston may be utilized, on one side, as a motive piston and, on the other, as the piston for the compression of the mixture.
  • the diameters of the two piston portions may be different from one another.
  • the lower cylinder portion and the relevant lower piston portion have a diameter which is smaller than the upper portions.
  • the piston is formed by two crowns 1C′ each provided with a small skirt 1A′.
  • the two crowns 1C and relevant skirts 1A are connected by a central rod 25 which has an X-shaped cross section.
  • the seat for the bush 2 is formed by said central rod 25.
  • the other elements, in particular the gears of the bypocycloid transmission, are the same as described with reference to Figs. 1 to 3 and are designated with the same reference numbers.
  • the invention is susceptible of various modifications and changes, for example in relation to the number of cylinders, to the application in two- or four-stroke-cycle engines, in OTTO or Diesel engines, yet all falling within the scope of the inventive idea. While the embodiment shown in the drawing provides for two gears 5 linked to two opposite flanges 10 in such a way that two engine shaft portions 11 can be driven into rotation by the same piston 1, it is possible to provide only one engine output shaft portion, while the opposite gears 5 and 6 are used only for balancing the forces acting on the pin 4.
  • one shaft may be used as output shaft from which power is taken, while the other shaft 11 is used for driving auxiliary members of the engine, such as an alternator or similar engine members.
  • the two shafts may have different cross sections, as shown in Figs. 1 to 4.
  • Figs. 6 and 7 show an arrangement with two cylinder-piston units, generically indicated at 30 and 31, which form a multiple-cylinder engine.
  • Each unit 30, 31 is similar to the embodiment of Figs. 1 to 4 and similar or corresponding parts are designated with the same reference numbers increased by 100.
  • Each unit 30, 31 comprises a cylinder 121 having two opposite heads (not shown), wherein a corresponding piston 101 having two crowns 101C is slidingly housed.
  • the two crowns of each piston 101 are connected by a central rod 125.
  • the central rod 125 is made in two parts 125A, 125B connected by screws 126.
  • the latter supports a pin 104 which is provided with two opposite end portions on which opposite externally toothed gears 105 are solid.
  • the axes of the two gears 105 of each unit 30, 31, respectively, are aligned to each other, but out of alignment with respect to the axis of the bushing bearing 103.
  • Each externally toothed gear 105 meshes with corresponding internally toothed gears 106 which, in this particular embodiment, are housed within the corresponding cylinder 121, and are solid therewith.
  • Each externally toothed gear 105 is provided with a pin 108 which is coaxial with the relevant gear 105 and is supported by a bearing 109 fitted into a relevant flywheel 110 which is solid with a shaft 111 or 112 respectively.
  • the two shafts 112 project toward each other and are connected to each other and to a gear 135 which meshes with a further gear 136 supported by an output shaft 137 (Fig. 7).
  • the shafts 111 can be used to power auxiliary members of the engine. This arrangement avoids the passage of the useful power through the whole shaft 111, 112, 104.
  • gears 105, 106 and of flywheels 110 within the relevant cylinders 121 allows a reduction of the overall dimensions of the engine, especially when the cylinders have a relatively large diameter.
EP19910830048 1990-02-26 1991-02-15 Engine with double-acting pistons and without connecting rods Withdrawn EP0454627A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT04520390A IT1247599B (it) 1990-02-26 1990-02-26 Motore con pistoni a doppio effetto privo di bielle.
IT4520390 1990-02-26

Publications (2)

Publication Number Publication Date
EP0454627A2 true EP0454627A2 (de) 1991-10-30
EP0454627A3 EP0454627A3 (en) 1992-12-16

Family

ID=11256668

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910830048 Withdrawn EP0454627A3 (en) 1990-02-26 1991-02-15 Engine with double-acting pistons and without connecting rods

Country Status (2)

Country Link
EP (1) EP0454627A3 (de)
IT (1) IT1247599B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999011948A1 (fr) * 1997-09-03 1999-03-11 Vadim Nikolaevich Sivurov Mecanisme hypocycloide permettant de transformer un mouvement de va-et-vient en mouvement rotatif
DE102005024361A1 (de) * 2005-05-27 2006-12-07 Bayerische Motoren Werke Ag Antriebsaggregat für Fahrzeuge
WO2012148365A1 (en) * 2011-04-27 2012-11-01 TOPRAK, Ahmet Easy-to-produce, high efficiency internal combustion engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3607421A1 (de) * 1986-03-06 1987-09-10 Zott Kg Doppeltwirkender zweitaktverbrennungsmotor
EP0265546A1 (de) * 1984-11-01 1988-05-04 Spurgeon Beshore Craig Doppeltwirkende Maschine mit dosenförmigem Kolben
JPS63167031A (ja) * 1986-12-26 1988-07-11 Toshiaki Tsujioka 内燃機関
WO1989007704A1 (en) * 1988-02-10 1989-08-24 Claude Hector May Internal combustion engine
US4864976A (en) * 1988-05-27 1989-09-12 Avelino Falero Internal combustion engine and piston structure therefore

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265546A1 (de) * 1984-11-01 1988-05-04 Spurgeon Beshore Craig Doppeltwirkende Maschine mit dosenförmigem Kolben
DE3607421A1 (de) * 1986-03-06 1987-09-10 Zott Kg Doppeltwirkender zweitaktverbrennungsmotor
JPS63167031A (ja) * 1986-12-26 1988-07-11 Toshiaki Tsujioka 内燃機関
WO1989007704A1 (en) * 1988-02-10 1989-08-24 Claude Hector May Internal combustion engine
US4864976A (en) * 1988-05-27 1989-09-12 Avelino Falero Internal combustion engine and piston structure therefore

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 434 (M-764)(3281) 16 November 1988 & JP-A-63 167 031 ( TOSHIAKI TSUJIOKA ) 11 July 1988 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999011948A1 (fr) * 1997-09-03 1999-03-11 Vadim Nikolaevich Sivurov Mecanisme hypocycloide permettant de transformer un mouvement de va-et-vient en mouvement rotatif
DE102005024361A1 (de) * 2005-05-27 2006-12-07 Bayerische Motoren Werke Ag Antriebsaggregat für Fahrzeuge
WO2012148365A1 (en) * 2011-04-27 2012-11-01 TOPRAK, Ahmet Easy-to-produce, high efficiency internal combustion engine

Also Published As

Publication number Publication date
IT9045203A0 (it) 1990-02-26
EP0454627A3 (en) 1992-12-16
IT9045203A1 (it) 1991-08-26
IT1247599B (it) 1994-12-28

Similar Documents

Publication Publication Date Title
US4898041A (en) Drive linkage for reciprocating engine
US4848282A (en) Combustion engine having no connecting rods or crankshaft, of the radial cylinder type
GB2060785A (en) Opposed piston machinery
US20030183026A1 (en) Apparatus for converting rotary to reciprocating motion and vice versa
RU2213227C2 (ru) Поршневая машина с бесшатунным механизмом
US6006619A (en) Internal combustion engine with improved orbital crankshaft motion converter
EP0454627A2 (de) Motor mit doppelt wirkendem Kolben und ohne Pleuel
JPH0419454A (ja) プラネタリピボットピンを有するクランクドライブ
US6273052B1 (en) Coupling arrangement for reciprocating piston engine
US4827896A (en) Internal combustion engine without connecting rods
RU2151878C1 (ru) Поршневая машина
RU98113653A (ru) Двигатель внутреннего сгорания
GB2320058A (en) Piston engine with twin counter-rotating crankshafts and two connecting rods per piston
RU2122638C1 (ru) Бесшатунный поршневой двигатель
GB2103755A (en) Mechanism having a reciprocating member coupled to a rotary member
KR890014927A (ko) 내연기관용 왕복동 실린더-피스턴조립체
US3521615A (en) Internal combustion engine
GB2349417A (en) I.c. engine with piston connected by two con-rods to a pair of contra-rotating crankshafts
RU2044905C1 (ru) Оппозитный двигатель со встречно движущимися рабочими органами
RU2270U1 (ru) Бесшатунный механизм для двигателя внутреннего сгорания
RU2090768C1 (ru) Бесшатунный механизм поршневых двигателей внутреннего сгорания для преобразования возвратно-поступательного движения во вращательное
FR2438746A1 (fr) Moteur a cylindres opposes et bielles fixes
RU3630U1 (ru) Бесшатунный приводной механизм
US4813386A (en) Internal combustion engine without connecting rods
WO2022075960A1 (ru) Устройство и способ преобразования возвратно-поступательного движения во вращательное движение и наоборот

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 GB IT SE

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 GB IT SE

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930617