EP2108798A2 - Abutting or opposite piston internal combustion engine for go-kart, motorcycle, motor vehicle, nautical and areonautical use - Google Patents
Abutting or opposite piston internal combustion engine for go-kart, motorcycle, motor vehicle, nautical and areonautical use Download PDFInfo
- Publication number
- EP2108798A2 EP2108798A2 EP08010958A EP08010958A EP2108798A2 EP 2108798 A2 EP2108798 A2 EP 2108798A2 EP 08010958 A EP08010958 A EP 08010958A EP 08010958 A EP08010958 A EP 08010958A EP 2108798 A2 EP2108798 A2 EP 2108798A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- washer element
- head
- internal combustion
- spacer washer
- 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- Withdrawn
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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
- F02B75/28—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
- F02B75/282—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders the pistons having equal strokes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B7/00—Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
- F01B7/02—Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders with oppositely reciprocating pistons
- F01B7/14—Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders with oppositely reciprocating pistons acting on different main shafts
Definitions
- the present invention relates to an abutting or opposite piston internal combustion engine for go-kart, motorcycle, motor vehicle, nautical and aeronautical use.
- the aim of the present invention is to overcome the above mentioned drawbacks, by providing an internal combustion engine which has a much greater efficiency and power, together with a much .lower wear, than a conventional engine of a same displacement.
- a main object of the invention is to provide such an engine which is adapted to safely and efficiently operate with a broad range of operating loads.
- Another object of the invention is to provide such an engine which can operate both with a high efficiency and a low wear, both in a two stroke and in a four stroke configuration.
- Yet another object of the present invention is to provide such an engine which can be quickly and easily assembled on and disassembled from kart, motorcycle, boat, airplane and other motor vehicle chassis assemblies, without requiring substantial modifications of said chassis assemblies.
- Yet another object of the present invention is to provide such an internal combustion engine which, owing to its specifically designed construction, is very reliable and safe in operation.
- an internal combustion engine particularly for karts, motorcycles, motorboats, airplanes and the like, comprising an engine body defining a combustion chamber therein, and being characterized in that said engine body comprises, in said combustion chamber, a first and second opposite pistons, said first and second opposite pistons being coupled to respective driving means, said first and second pistons being movable with respect to a middle portion of said chamber, where igniting spark plug means are arranged, said engine comprising moreover fuel feeding and gas discharging means.
- the internal combustion engine according to the present invention which has been specifically designed for karts, motorcycles, motorboats, airplanes and motor vehicles in general, comprises an engine body defining in its inside a combustion chamber.
- said engine body which has been generally indicated by the reference number 1, comprises, in a first embodiment thereof, a first half-body 2 and a second half-body 3 which, according to an important aspect of the invention, are conventional motorcycle or kart engine bodies, without their finned heads.
- Said half-bodies 2 and 3 which are advantageously identical to one another, have respectively a bottom face, generally indicated by the reference numbers 4 and 5, and a top face, generally indicated by the reference numbers 6 and 7.
- Said head-less half-bodies 2 and 3 are operatively coupled to one another by abutting and firmly coupling their head or top faces 6 and 7 which, as is known, are substantially of flat configuration and provided with a circular central bore, having a diameter substantially equal to that of the respective piston arranged inside the respective combustion chamber of each said half-body 2 and 3.
- the two central bores will be so aligned as to cause their axes to be arranged one on the extension of the other.
- the two head faces 6 and 7 may be coupled by a spacer ring-like element or washer 15, preferably made of a metal material.
- said washer element 15 is provided with a throughgoing threaded hole for coupling a conventional igniting spark plug 16, which, through a conductor element 17, is connected to conventional ignition timing means, which have not been specifically shown.
- the number of sparking plugs and threaded holes, formed through the washer element 15, can be any, depending on requirements.
- the spacer washer or ring element 15 may be omitted, and the head faces 6 and 7 of the two half-bodies 2 and 3 can be abutted directly onto one another, by firmly coupling them.
- the two half-bodies of the engine can be replaced by a single body defining a combustion chamber on a middle portion thereof will be defined recesses for housing spark plug means therein.
- sprockets 18 and 19 are herein provided, and coupled by a coupling driving chain 20, with optional chain tension means, for coupling to the drive shaft, which will turn in a single direction.
- the combustion chamber comprises two partial combustion chambers 22 and 23, therein are slidably housed corresponding pistons 24 and 25 having a piston body 26 and 27 and a piston head 28 and 29.
- Said pistons are coupled, in a per se known manner, to a respective connecting rod 30 and 31.
- Each connecting rod 30 and 31 has a first end portion 33 coupled to the related piston, and a second end portion 34 operatively coupled to the driveshaft.
- the pistons 26 and 27 shown in figure 3 are arranged at their bottom dead center, whereas in figure 4 they are arranged at their top dead center.
- the piston will substantially be arranged flush on the holes of the head faces of the motor bodies, that is said pistons have their crowns arranged near the chain supporting washer 15.
- a four-stroke engine where, at the middle portion of the combustion chamber, are provided piston valves 40 and 41 which are operatively coupled to cams 43 and 44 in turn coupled by small shafts or spindles 45 and 46 which are driven by distributing or driving chains 50 and 51 which, as is shown in figure 7 , are coupled to respective drive shafts.
- Figures 8 and 9 show a modified embodiment of the four-stroke engine, including the related valves.
- said figures 8 and 9 show a modified embodiment of the inventive motor, characterized in that it is provided with valves 61 which are respectively driven by the cams 43 and 44.
- This engine comprises sparking plugs 16, opposite pistons 28 and 29, coupled to connecting rods 30 and 31 which, at the other end portions thereof, are in turn coupled to drive shafts 34.
- the subject engine may operate in a very reliable manner, with an efficiency much greater than that of a like engine of like displacement, with a minimum wear; moreover, it provides a high power which is transmitted to the driveshaft in a very even manner.
- the subject engine which has been herein indicated by the reference number 1, is very suitable to be quickly and easily applied on a go-kart 60, since it has a small weight, together with a high power.
- inventive engines can be also applied to any desired types of motor vehicle.
- the used materials provided that they are compatible to the intended application, as well as the contingent size and shapes, can be any, according to requirements.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Automatic Cycles, And Cycles In General (AREA)
Abstract
Description
- The present invention relates to an abutting or opposite piston internal combustion engine for go-kart, motorcycle, motor vehicle, nautical and aeronautical use.
- As is known, the so-called "go-karts", or more simply "karts", that is small four-wheel vehicles used for sports races or the like, conventionally comprise small internal combustion engines, generally of a two-stroke or four-stroke type, with either a single cylinder or two cylinders, of a comparatively high power, since they operate with a comparatively high revolution number.
- However, because of this high revolution number, which can amount up to 20,000 RPM's, prior kart engines are subjected to a high wear, and must be fully overhauled, even after a single race, with a very high overhauling cost.
- Moreover, the efficiency of the above mentioned engines is very low, because of their great energy dissipation.
- In this connection it should be pointed out that also engines used in motorcycle, nautical, aeronautical and other vehicles, even if they operate with a much smaller revolution number, have a small efficiency, because of their large power dissipations.
- Accordingly, the aim of the present invention is to overcome the above mentioned drawbacks, by providing an internal combustion engine which has a much greater efficiency and power, together with a much .lower wear, than a conventional engine of a same displacement.
- Within the scope of the above mentioned aim, a main object of the invention is to provide such an engine which is adapted to safely and efficiently operate with a broad range of operating loads.
- Another object of the invention is to provide such an engine which can operate both with a high efficiency and a low wear, both in a two stroke and in a four stroke configuration.
- Yet another object of the present invention is to provide such an engine which can be quickly and easily assembled on and disassembled from kart, motorcycle, boat, airplane and other motor vehicle chassis assemblies, without requiring substantial modifications of said chassis assemblies.
- Yet another object of the present invention is to provide such an internal combustion engine which, owing to its specifically designed construction, is very reliable and safe in operation.
- According to one aspect of the present invention, the above mentioned aim and objects, as well as yet other objects, are achieved by an internal combustion engine, particularly for karts, motorcycles, motorboats, airplanes and the like, comprising an engine body defining a combustion chamber therein, and being characterized in that said engine body comprises, in said combustion chamber, a first and second opposite pistons, said first and second opposite pistons being coupled to respective driving means, said first and second pistons being movable with respect to a middle portion of said chamber, where igniting spark plug means are arranged, said engine comprising moreover fuel feeding and gas discharging means.
- Further characteristics and advantages of the present invention will become more apparent hereinafter from the following detailed disclosure of two preferred, though not exclusive, embodiments of an internal combustion engine, specifically designed for karts, motorcycles, motorboats, airplanes and the like, which is illustrated, by way of an indicative, but not limitative example, with reference to the accompanying drawings, where:
-
Figure 1 is a side view showing a first embodiment of an internal combustion engine, of a two-stroke type, according to the present invention; -
Figure 2 shows the engine shown infigure 1 , as seen from the other side; -
Figure 3 is a cross-sectional view showing the engine, the two pistons of which are arranged at the bottom dead center thereof; -
Figure 4 is a further cross-sectional view of the engine, with the pistons being arranged at the top dead center thereof; -
Figure 5 is a schematic view showing an internal combustion engine, of a four-stroke type, with the pistons thereof being arranged at the top dead center thereof; -
Figure 6 shows the four-stroke internal combustion engine with the pistons thereof being arranged at the bottom dead center; -
Figure 7 shows the distributing or timing belts of the four-stroke engine; -
Figures 8 and9 show the engine according to the present invention including the related valves; and -
Figure 10 schematically shows a kart to which an internal combustion engine according to the present invention has been applied. - With reference to the number references of the above mentioned figures, the internal combustion engine according to the present invention, which has been specifically designed for karts, motorcycles, motorboats, airplanes and motor vehicles in general, comprises an engine body defining in its inside a combustion chamber.
- More specifically, said engine body, which has been generally indicated by the
reference number 1, comprises, in a first embodiment thereof, a first half-body 2 and a second half-body 3 which, according to an important aspect of the invention, are conventional motorcycle or kart engine bodies, without their finned heads. - Said half-
bodies reference numbers - To said half-
bodies reference numbers 8 and 9 for feeding said bodies with a fuel supplied through pipes 11 and 12 from anouter tank 10, are coupled. - To said half-
bodies gas silencers bodies figures 3 and4 . - Said head-less half-
bodies body - In connecting the flat faces, the two central bores will be so aligned as to cause their axes to be arranged one on the extension of the other.
- In this connection it should be pointed out that the two head faces 6 and 7 may be coupled by a spacer ring-like element or
washer 15, preferably made of a metal material. - According to a further embodiment, said
washer element 15 is provided with a throughgoing threaded hole for coupling a conventionaligniting spark plug 16, which, through a conductor element 17, is connected to conventional ignition timing means, which have not been specifically shown. - The number of sparking plugs and threaded holes, formed through the
washer element 15, can be any, depending on requirements. - According to a modified embodiment of the inventive idea, the spacer washer or
ring element 15 may be omitted, and the head faces 6 and 7 of the two half-bodies - According to yet another embodiment of the invention, the two half-bodies of the engine can be replaced by a single body defining a combustion chamber on a middle portion thereof will be defined recesses for housing spark plug means therein.
- As shown in
figure 2 , sprockets 18 and 19 are herein provided, and coupled by acoupling driving chain 20, with optional chain tension means, for coupling to the drive shaft, which will turn in a single direction. - As shown in
figures 3 and4 , the combustion chamber comprises two partial combustion chambers 22 and 23, therein are slidably housedcorresponding pistons piston body piston head - Said pistons are coupled, in a per se known manner, to a respective connecting
rod - Each connecting
rod first end portion 33 coupled to the related piston, and asecond end portion 34 operatively coupled to the driveshaft. - The
pistons figure 3 are arranged at their bottom dead center, whereas infigure 4 they are arranged at their top dead center. - Thus, at their top dead center position, the piston will substantially be arranged flush on the holes of the head faces of the motor bodies, that is said pistons have their crowns arranged near the
chain supporting washer 15. - With reference to
figure 5 , is herein shown a four-stroke engine, where, at the middle portion of the combustion chamber, are providedpiston valves cams spindles driving chains 50 and 51 which, as is shown infigure 7 , are coupled to respective drive shafts. - With the engine arrangement shown in
figures 5 to 7 , an internal combustion engine operating in an operating manner conceptually analogous to the above operating manner is achieved, said engine providing a possibility of adjusting at will the timings of its pistons. -
Figures 8 and9 show a modified embodiment of the four-stroke engine, including the related valves. - In particular, said
figures 8 and9 show a modified embodiment of the inventive motor, characterized in that it is provided withvalves 61 which are respectively driven by thecams - This engine comprises
sparking plugs 16,opposite pistons rods shafts 34. - Practical tests have shown that the subject engine may operate in a very reliable manner, with an efficiency much greater than that of a like engine of like displacement, with a minimum wear; moreover, it provides a high power which is transmitted to the driveshaft in a very even manner.
- For the two stroke engine, the greater efficiency and power are probably due to a greater filling in of the engine according to the invention.
- This volume is a direct consequence of the fact that the engine bodies are devoid of heads and are coupled as hereinabove disclose.
- As shown in
figure 10 , the subject engine, which has been herein indicated by thereference number 1, is very suitable to be quickly and easily applied on a go-kart 60, since it has a small weight, together with a high power. - In this connection it should be apparent that the inventive engines can be also applied to any desired types of motor vehicle.
- From the above disclosure it should be apparent that the invention fully achieves the intended aim and objects.
- In particular, the fact is to be pointed out that the opposite arrangement of the pistons allows to provide practically a double combustion chamber, which allows to better balance the efforts, thereby reducing to a minimum the vibrations.
- The invention, as disclosed, is susceptible to several modifications and variations, all coming within the scope of the invention.
- For example, while the engine has been disclosed with reference to an embodiment thereof providing a single chamber with two opposite pistons, it would be possible to arrange in an adjoining relationship a plurality of cylinders, thereby providing engines including several pairs of pistons.
- In practicing the invention, the used materials, provided that they are compatible to the intended application, as well as the contingent size and shapes, can be any, according to requirements.
Claims (14)
- An internal combustion engine, particularly for go-karts, motorcycles, motorboats, airplanes, motor vehicles and the like, comprising an engine body defining a combustion chamber therein, characterized in that said engine body comprises, in said combustion chamber, a first and second opposite pistons coupled to respective drive means, said first and second pistons being movable with respect to a middle portion of said chamber where igniting spark plug means are provided, said engine further comprising fuel feeding and gas discharging means.
- An engine, according to the preceding claim, characterized in that said engine body comprises a first and second engine half-bodies which are substantially equal to one another, and each having a bottom end portion and a head end portion, the head end portions of each said engine half-body defining a substantially flat head face having a circular throughgoing bore for coupling said head faces thereby causing their central bores to substantially axially coincide and being arranged one as an extension of the other according to the longitudinal axis.
- An engine, according to the preceding claims, characterized in that said head faces of said end first engine half-bodies are abutted against one another by an interposition of a spacer washer element of a substantially circular crown configuration, said washer element defining a peripheral rim and being axially aligned with said two bores of said head faces.
- An engine, according to one or more of the preceding claims, characterized in that said head faces of said second engine half-bodies are directly abutted against one another without an interposition of a spacer washer element.
- An engine, according to one or more of the preceding claims, characterized in that said engine body comprises a headless integral cast single body.
- An engine, according to one or more of the preceding claims, characterized in that said spacer washer element comprises at least a throughgoing hole for engaging therein an igniting spark plug means.
- An engine, according to one or more of the preceding claims, characterized in that said spacer washer element has a diameter substantially equal to the diameter of each said bore of said head face of each said engine half-body.
- An engine, according to one or more of the preceding claims, characterized in that said spacer washer element has a diameter larger than the diameter of said bore.
- An engine, according to one or more of the preceding claims, characterized in that said spacer washer element is made of a metal material.
- An engine, according to one or more of the preceding claims, characterized in that said end portions of the connecting rods are operatively and rotatably coupled to the drive shaft through a coupling chain.
- An engine, according to one or more of the preceding claims, characterized in that said coupling chain comprises a chain tension device.
- An engine, according to one or more of the preceding claims, characterized in that said engine comprises, in a four stroke embodiment thereof, piston valves controlled by control cams coupled, through an adjustment chain, to the related drive shafts.
- An engine, according to one or more of the preceding claims, characterized in that said recesses for said ignition spark plug means are formed on the engine body at said middle portion thereof.
- An engine, according to one or more of the preceding claims, characterized in that said engine comprises a plurality of control cams oppositely driving corresponding valves.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI20080597 ITMI20080597A1 (en) | 2008-04-07 | 2008-04-07 | INTERNAL COMBUSTION ENGINE, PARTICULARLY FOR KART, MOTORCYCLES, MOTOR VEHICLES IN GENERAL. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2108798A2 true EP2108798A2 (en) | 2009-10-14 |
EP2108798A3 EP2108798A3 (en) | 2010-04-21 |
Family
ID=40296862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08010958A Withdrawn EP2108798A3 (en) | 2008-04-07 | 2008-06-17 | Abutting or opposite piston internal combustion engine for go-kart, motorcycle, motor vehicle, nautical and areonautical use |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2108798A3 (en) |
IT (1) | ITMI20080597A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9771861B2 (en) | 2014-09-09 | 2017-09-26 | Avl Powertrain Engineering, Inc. | Opposed piston two-stroke engine with thermal barrier |
US10047976B2 (en) | 2011-12-21 | 2018-08-14 | Venus Systems Limited | Centrifugal refrigerant vapour compressors |
US10458323B2 (en) | 2011-12-23 | 2019-10-29 | Cox Powertrain Limited | Internal combustion engines |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB496725A (en) * | 1937-06-01 | 1938-12-01 | Frederick William Dixon | Improvements in two-stroke cycle internal combustion engines with swash-plate driving-gear |
FR889151A (en) * | 1941-07-07 | 1944-01-03 | Engine | |
GB1041852A (en) * | 1962-03-16 | 1966-09-07 | Bbc Brown Boveri & Cie | Two-stroke internal combustion engine |
DE9201648U1 (en) * | 1992-02-11 | 1992-04-16 | Fritsche, Walter, 8934 Grossaitingen, De | |
DE19722129A1 (en) * | 1997-05-27 | 1998-12-03 | Gwozdz Henryk | Internal combustion engine |
DE19812800A1 (en) * | 1998-03-16 | 1999-09-23 | Dancho Zochev Donkov | Opposed piston IC engine for large stationary or ship engines |
US20050274332A1 (en) * | 2004-06-10 | 2005-12-15 | Lemke James U | Two-cycle, opposed-piston internal combustion engine |
WO2007121086A2 (en) * | 2006-04-18 | 2007-10-25 | Cleeves Engines Inc. | An internal combustion engine |
-
2008
- 2008-04-07 IT ITMI20080597 patent/ITMI20080597A1/en unknown
- 2008-06-17 EP EP08010958A patent/EP2108798A3/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB496725A (en) * | 1937-06-01 | 1938-12-01 | Frederick William Dixon | Improvements in two-stroke cycle internal combustion engines with swash-plate driving-gear |
FR889151A (en) * | 1941-07-07 | 1944-01-03 | Engine | |
GB1041852A (en) * | 1962-03-16 | 1966-09-07 | Bbc Brown Boveri & Cie | Two-stroke internal combustion engine |
DE9201648U1 (en) * | 1992-02-11 | 1992-04-16 | Fritsche, Walter, 8934 Grossaitingen, De | |
DE19722129A1 (en) * | 1997-05-27 | 1998-12-03 | Gwozdz Henryk | Internal combustion engine |
DE19812800A1 (en) * | 1998-03-16 | 1999-09-23 | Dancho Zochev Donkov | Opposed piston IC engine for large stationary or ship engines |
US20050274332A1 (en) * | 2004-06-10 | 2005-12-15 | Lemke James U | Two-cycle, opposed-piston internal combustion engine |
WO2007121086A2 (en) * | 2006-04-18 | 2007-10-25 | Cleeves Engines Inc. | An internal combustion engine |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10047976B2 (en) | 2011-12-21 | 2018-08-14 | Venus Systems Limited | Centrifugal refrigerant vapour compressors |
US10458323B2 (en) | 2011-12-23 | 2019-10-29 | Cox Powertrain Limited | Internal combustion engines |
US9771861B2 (en) | 2014-09-09 | 2017-09-26 | Avl Powertrain Engineering, Inc. | Opposed piston two-stroke engine with thermal barrier |
Also Published As
Publication number | Publication date |
---|---|
ITMI20080597A1 (en) | 2009-10-08 |
EP2108798A3 (en) | 2010-04-21 |
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