This application claims benefit of Serbian patent application serial number P-143/04, filed Feb. 18, 2004, which is herein incorporated by reference.
Invention is from the field of piston internal combustion engines, or closer engines with rotary pistons. By International Patent Classification, (ICP) it belongs to group F 02B 53/00.
Core of this invention is:
So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by referenced to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
Oscillating lever (8) on one of its ends has shackle whose both openings are connected by connecting axle (9) and via it with end of connecting rod (7) so that inner sides of shackle are located to the left and right of connecting rod (7). On its other end oscillating lever (8) has opening which is via pin (10) connected to the opening (23) which is located in internal space cylindrical rotor (2) (but which instead opening (23) can also be connected with opening (25) which is also located in the internal space cylindrical rotor (2)). That way oscillating lever (8) transfers to the internal space cylindrical rotor (2) gas force created by combustion of fuel in expansion stroke in work chamber of radial placed work cylinder (3). Gas force relative to the center of the internal space cylindrical rotor (2) creates torque which results in rotation of internal space cylindrical rotor (2) around its axis. In the remaining strokes (exhaust, intake, compression) rotation from internal space cylindrical rotor (2) due to momentum, with help of flywheel located outside of elliptical rotary motor, transfers via oscillating lever (8) and connecting axle (9) to the piston (6).
Gear mechanism consists of two satellite gears (12) which, via openings which are displaced from their centers, are mutually parallel connected by connecting axle (9). Satellite gears (12) are geared to two inner tooth gears (11) which are offset by eccentricity eh and ev relative to the center of rotation of internal space cylindrical rotor (2) and in a ratio i=2. Depending upon distance between their longitudinal axes and axis of opening in which they are connected to connecting axle (9), directly depends stroke of piston (6) and displacement of work chamber of radial placed work cylinder (3). Satellite gears (12) are positioned relative to each other as in mirror image and are carried by swinging bearing rings (13) via sleeve. Abovementioned swinging bearing rings (13) are via bearings mounted to the hubs of deck-lids (18) and relative to longitudinal axis of deck-lids (18) are offset by the same eccentricities eh and ev as inner tooth gears (11). Because of mentioned ratio i=2, every point of satellite gears (12) (except their centers) during their rolling in each work cycle, which lasts 360 degrees, moves along imagined closed elliptic curve. That makes possible for new work cycle again to begin always from the same position of internal space cylindrical rotor (2) relative to motor housing (1) and also that motion along imagined ellipse makes possible to define during each work cycle position of piston (6) relative to the two outer dead centers (upper and lower ODC) and two inner dead centers (left and right IDC).
Entire gear mechanism functions as follows:
motion of piston (6) via connecting rod (7) transfers to the connecting axle (9) which is connected to satellite gears (12) causing their rolling along inner tooth gears (11). Simultaneously satellite gears (12) spin around their own axes and because swinging bearing rings (13) carry them via sleeves during their rolling and spinning relative to longitudinal axis of radial placed work cylinder (3) they also make relative oscillating motion as a pendulum. In other words from the vantage point on axes of radial placed work cylinder (3), during rotation of internal space cylindrical rotor (2) satellite gears (12) alternately appear on the left end right side of that axis. The length of that pendulum is defined by normal distance between longitudinal axis of swing rings (13) and axis of sleeve or that length is equal to half diameter of basic circle of satellite gear (12). Amplitude of those oscillations depends on mutual relation between half axes of above mentioned imagined ellipse as well as value of selected eccentricities eh and ev. Angle speed of center of satellite gears (12) relative to center of rotation of internal space cylindrical rotor (2) when angle speed of internal space cylindrical rotor (2) is constant, changes during one work cycle. Shape and size of lower part of opening in internal space cylindrical rotor (2) where satellite gears (12) are located depend on amplitude of their oscillation. Torque from internal space cylindrical rotor (2), via shafts (17) and (20), and form integral internal space cylindrical rotor (2), and which rest on bearings (22), transfers outside motor.
Piston (6) has dome whose shape matches inner shape of work cylinder cap (4). When horizontal symmetrical axes of both inner tooth gears (11) move by the same value of eccentricity eh or by half of height of space between top of dome of piston (6) and inner surface of motor housing (1), when piston (6) relative to radial placed work cylinder (3) is in upper outer dead center (UODC) in position of initial displacement of work chamber—then thru opening (16), located in wall of motor housing (1), piston (6) at the end of exhaust stroke expels all residual products of combustion which previously have not left work chamber of radial placed work cylinder (3) (which is schematically shown in picture 3 when piston (6) is in lower outer dead center (LODC). That way in work chamber of radial placed work cylinder (3) there are no residual products of combustion from the cycle which just ended so that in intake stroke which immediately follows, in work displacement of radial placed work cylinder (3) where there is only mixture of fuel-air (or air only in diesel version of elliptical rotary motor).
All four work strokes are completed when internal space cylindrical rotor (2) spins 360 degrees around its longitudinal axis and when piston (6) is located two times in position of two upper dead center and two lower dead centers. Different duration of those work cycles and also mode of change of work displacement of radial placed work cylinder (3) as a function of change of that angle may occur because:
Selection of either of abovementioned possibilities individually, or all possibilities simultaneously, causes different change of slant of longer axis of mentioned imagined ellipse relative to longitudinal axis of internal space cylindrical rotor (2), or relative to horizontal axis of inner tooth gears (11). That way in all strokes of work cycle, optimal mode of change of displacement of work chamber of radial placed work cylinder (3), may be selected relative to change of angle of rotation of internal space cylindrical rotor (2).
Sealing of work chamber of radial placed work cylinder (3) or prevention of leaking of fuel-air mixture or exhaust gases is done by piston rings located in grooves in piston (6) and rings (seals) located in sealant groove (5) in work cylinder cap (4) of radial placed work cylinder (3).
Cooling of elliptic rotary motor is done by coolant circulating thru cooling chambers (21) located in the wall of motor housing (1) and also by oil which is on the inside of motor housing (1) by the action of centrifugal force applied to the moving parts of the elliptical rotary motor.
Connecting of motor housing (1) to inner tooth gears (11) and deck-lids (18) is done by bolts and defining of initial position of motor mechanism and centering of motor housing (1), inner tooth gears (11) and deck-lids (18) is done by centering pin.
Also located in motor housing (1) are opening (19) for regulation sub-pressure and opening (24) for flushing and cooling of the dome of the piston (6).
Elliptical rotary motor is closed on both sides by deck-lids (18) which simultaneously serve as carriers of bearings (22) and swinging bearing rings (13).
Work cycle of elliptical rotary motor begins by moving of piston (6) from LODC towards right inner dead center (RIDC) by the intake stroke in-taking fuel-air mixture (or only air in diesel version of elliptical rotary motor) into work chamber of radial placed work cylinder (3) thru intake port (15) located in the wall of motor housing (1). Intake stroke ends with arrival of piston (6) to the RIDC and continued motion of piston (6) towards UODC begins compression stroke. Ignition of compressed fuel-air mixture (or injection of fuel into compressed air in diesel version) is done by spark of the spark plug (or by injector in diesel version) from spark plug opening (14) of motor housing (1). Moment of ignition (or injection) can happen before piston (6) arrives to UODC, at UODC or after passing of piston (6) thru UODC, depending on selected mode of change of displacement of work chamber of radial placed work cylinder (3) and selected size of angle of rotation of internal space cylindrical rotor (2) in individual strokes of the work cycle. After completed combustion piston (6) due to gas force continues motion towards LIDC when in expansion stroke portion of potential energy of the products of combustion transforms into mechanical work. Expansion stroke ends by arrival of piston (6) to LIDC and immediately after that work chamber of radial placed work cylinder (3) arrives to the exhaust port (16) located in the wall of motor housing (1). Continued motion of piston (6) towards LODC eliminates products of combustion from the work chamber of radial placed work cylinder (3) thru exhaust port (16) simultaneously by outflow due to pressure of the products of combustion in work chamber of radial placed work cylinder (3) and pushing of products of combustion by the dome of piston (6).
Number | Date | Country | Kind |
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143/04 | Feb 2004 | YU | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/IB2005/001018 | 2/10/2005 | WO | 00 | 8/17/2006 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2005/080768 | 9/1/2005 | WO | A |
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618157 | Wolf | Jan 1899 | A |
1341332 | McDonald | May 1920 | A |
1766385 | Jackson | Jun 1930 | A |
1918174 | Berggren | Jul 1933 | A |
1990660 | McCann | Feb 1935 | A |
2036060 | Lewis | Mar 1936 | A |
2244438 | Wilkerson | Jun 1941 | A |
3391678 | Luckhardt | Jul 1968 | A |
3931810 | McGathey | Jan 1976 | A |
Number | Date | Country |
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859694 | Dec 1952 | DE |
Number | Date | Country | |
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20070131179 A1 | Jun 2007 | US |