Title of Invention

A ROTARY ENGINE

Abstract

This is an invention of rotary engine that comprises of a casing, rotor, stoppers, valves and cams. The casing has a cavity and rotor is placed inside it, combustion chamber is placed on the peripheral of the casing. The rotor is rotating circularly around a fixed shaft. Stoppers are used to get the sequence intake, compression, expansion, exhaust without changing the direction of rotor ( without reciprocating motion) or complicated movement of rotor ( like in Wankel engine). Valves are used for intake and exhaust. Intake takes place between intake stopper and lobe of rotor through intake valve. After intake the charge is compressed between lobe and intake stopper and goes into combustion chamber as rotor rotates and completely goes into combustion chamber. And combustion takes place. When lobe crosses the combustion chamber opening expansion takes place between lobe and exhaust stopper and pushes rotor. This is how compression and expansion take place with out changing the rotors rotating direction. After that exhaust take place between exhaust stopper and lobe, through exhaust valve. Constant volume heat addition is achieved by increasing the width of the lobe's end such that it closes the opening of combustion chamber for the time required for complete combustion of charge as lobes end crosses combustion chamber.

Full Text

Background of invention; This relation relates to IC engines in general and more particularly pertains to a new rotary engine. Existing IC engines have certain drawbacks like low efficiency less efficient transfer of power to shaft and lower power to weight ratio etc. Various rotary engine structure has been proposed in the prior art. Some have narrow working compartment resulting in high drag others have very bad combustion chamber geometry which can not be altered. Some have complicated mechanisms to provide unidirectional rotation, some others are bidirectional. And constant volume heat addition is not possible in prior arts. Object of invention; In view of the forgoing disadvantages present in the prior art, the present invention provides a new rotary engine construction with wider compartments, with combustion chamber for which geometry can be altered without changing other construction details of engine, with unidirectional rotation of rotor without any complicated mechanisms and with constant volume heat addition capability. Summary of invention; To attain the above said objectives, the present invention generally comprises a casing, rotor, stoppers, valves and cams. The casing has a cavity and rotor is placed inside it, combustion chamber is placed on the peripheral of the casing. The rotor is rotating circularly around a fixed shaft. Stoppers are used to get the sequence intake , compression, expansion, exhaust without changing the direction of rotor ( without reciprocating motion) or complex movement of rotor (like in Wankel engine). Valves are used for intake and exhaust. Intake takes place between intake stopper and lobe of rotor through intake valve. After intake the charge is compressed between lobe and intake stopper and goes into combustion chamber as rotor rotates and completely goes into combustion chamber. And then combustion takes place. When lobe crosses the combustion chamber opening expansion takes place between lobe and exhaust stopper and pushes rotor. This is how compression and expansion take place with out changing the rotors rotating direction. After that exhaust take place between exhaust stopper and lobe, through exhaust valve. Constant volume heat addition is achieved by increasing the width of the lobe"s end such that it closes the opening of combustion chamber for the time required for complete combustion of charge as lobes end crosses combustion climber. Fallowing are some properties of the engine:-Advantages over Piston Engine 1) Engine is rotary in type. 2) ft is highly balanced, so less vibration, less maintenance 3) It is compact and lighter than piston engine. 4) Fewer moving parts, no piston, no connection rod, no crankshaft, no flywheel and no timing chain/ push rod etc. 5) Volumetric efficiency is very high, since there are two suction strokes per cycle. 6) Separation of exhaust region food intake region gives better combustion. 7) Since intake area and exhaust area are separate, we can increase the expansion ratio. 8) It is cheaper and simpler for mass-production, due to absence of connection rod, crankshaft, cams and timing chain/ push rod. 9) Higher RPM is achievable, since valve opening and closing are more gradual. . Disadvantages over Piston Engine 1) High surface to volume ratio (around 1/3"* higher). Advantages over Wankel engine 1) Combustion Chamber can be properly designed for efficient combustion, since combustion chamber is separate. 2) Since Combustion Chamber can be properly designed for swirl for efficient combustion, ignition trouble is less *3) Surface to volume ratio is very less at combustion chamber. 4) No gear assembly to transfer power to shaft. 5) More balanced, since rotor rotates around a single center 6) Sealing problem is less. 7) Since intake area and exhaust area are separate, we can increase the expansion ratio. Disadvantages over Wankel engine 1) It requires four valves. Before explaining at least one embodiment of invention in detail. It is to be understood that the invention is not limited in its application to the details of construction and to the arrangement of the components set forth in the following description or illustrated in the drawings. Also, it is to be understood that phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting. ] As such those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as the basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention. Brief description of accompanying drawing Sheetl): Isometric view of the rotary engine of the present invention in completely assembled form without caml and with casing cover raised above. Sheet2): Exploded view of the rotary engine of the present invention, without Casing cover. Sheets): In the figure the sequence of operation of stoppers and valves in one revolution with state of gases in each compartment of the rotary engine of the present invention. Sheet4): The sequence of operation of stoppers and valves in the next revolution with state of gases in each compartment of the rotary engine of the present invention. Sheets): In the figure opening and closing sequence of valves and stoppers for one revolution of the rotary engine of the present invention is shown. Sheet6): Schematic diagram of the sequence intake, compression, expansion and exhaust of the rotary engine of the present invention. Sheet?): In the figure 4 different views (isometric, top, left and oblique) of casing of the rotary engine of the present invention are given. Sheets): In the figure 4 different views (isometric, top, left and oblique) of rotor of the rotary engine of the present invention Sheet9): In the figure 4 different views (isometric, top, left and oblique) of intake stopper assembly of the rotary engine of the present invention Sheetl 0): In the figure 4 different views (isometric, top, left and oblique) of intake valve of the rotary engine of the present invention are given. Sheetll): In the figure 4 different views (isometric, top, left and oblique) of intake stopper of the rotary engine of the present invention are given. S-heetl2): In the figure 4 different views (isometric, top, left and oblique) of Bracket with connecting block for intake stopper of the rotary engine of the present invention are given. Sheetl3): hi the figure 4 different views (isometric, top, left and oblique) of exhaust stopper assembly of the rotary engine of the present invention are given. Sheetl4): hi the figure 4 different vicAvs (isometric, top, left and oblique) of exhaust valve of the rotary engine of the present invention are given. SheetlS): In the figure 4 different views (isometric, top, left and oblique) of exhaust stopper of the rotary engine of the present invention are given. Sheetl6): hi the figure 4 different views (isometric, top, left and oblique) of Bracket with connecting block for exhaust stopper of the rotary engine of the present invention are given. SheetlT): hi the figure 4 different views (isometric, top, left and oblique) of cam2 for operating the exhaust stoppers of thi; rotary engine of the present invention are given. SheetlS): In the figure 4 different views (isometric, top, left and oblique) of caml for operating the intake stpppers of the rotary engine of the present invention are given. Detailed description of the invention with reference to drawing: .The rotary engine of the present invention is a heat engine. It is rotary in type. Cycle used is Otto cycle and other cycles similar to it can be used. Stoppers are used to get the sequence intake compression, expansion, and exhaust. Descriptions of its components are given below. Numbers in parenthesis or bracket correspond to numbers in the drawing in their respective jgheets unless otherwise specified. Casing; Casing is shown in sheet2 it has an internal cavity of a shape of hollow cylinder with one end closed. The closed end has a hole (15) for inserting rotor"s shaft. The casing also has two smaller cavities for combustion chambers (1, 2) at diametrically opposite ends. Opening of combustion chamber is towards the center of casing. Combustion chamber has provisions for spark plug or injector. Volume of combustion chamber can be changed according to the compression ratio without affecting the casing volume. It has rectangular slots for Exhaust Stopperl (4), Exhaust Stopper2 (6), Intake stopperl (3) and Intake stopper2 (5) at diametrically opposite ends. It has seats for Intake Valvel (7), Intake Valve2 (9), Exhaust Valvel (8), Exhaust Valve2 (10). It also has ports to each of the valves fi-om outside (11,12,13 and 14). Casing has a top lid (16) to close it. Rotor; Rotor is shown in sheet 8. Rotor has two lobes (1 and 2) at diamstrically opposite side. It has a central shaft (3), which is the drive shaft. Maximum diametbr of the rotor is almost equal to casings inner diameter with some gap for fi:ee rotation. By increasing the width of lobe2 (1) at the edge we can increase constant volume heat addition time thereby increasing efficiency. So early ignition is not necessary, because of that backpressure will be less. By increasing steepness of the curve of rotor before lobe2 (1) (beginning of exhaust region) we can increase the torque on shaft. Since intake area and exhaust area are separate in rotor by increasing exhaust area without changing intake area we can increase efficiency (maintaining compression ratio). Intake Stopper assembly; It is shown in sheet 9. There are two intake stopper assemblies. They are positioned diametrically opposite side of casing. Each assembly comprises of stopper (3), bracket (4) and connecting block with rollers (5). The stopped can move relative to bracket only longitudinally about 2mm of distance. Bracket is fixed at one end of stopper and connecting block is fixed to bracket. The rail in caml is locked between the rollers in connecting block Intake valve (1) is positioned near the stopper. Intake Valve; Intake valve is shown in sheetlO. It has a rectangular head (1) with a stem (2) on it. The head"s inner radius (3) is equal to inner radius of casing. It seals the casing"s intake opening completely when closed as shown in the complete assembly drawing (Sheet 1). Intake Stopper; Intake stopper is shown in sheetll. It has a shape of upside down "T". It has two slots (2) at lesser wide end (3) on opposite sides. The slots are provided for inserting bracket. There is a projection (1) in the stopper for moving the intake valve. The width of stopper is such that it seals the gap in the casing. Length of the wider rectangular area is higher than the difference between inner radius of the casing and the minimum radius of the rotor. Bracket with connecting block for intake stopper; It is shown in sheetl2. The shape of bracket (3) is 90° rotated "U". The bottom hand of the bracket has a vertical rectangular cut (4) inside so that it can be inserted into the slots in stoppers. The height of the bottom hand is about 2 mm less than the height of slots in stoppers to provide relative motion. A "T" shaped block (5) is used to close the open end of bracket with stopper locked inside. Connecting block (2) has two rollers (1) which lock the rail in Cams. The connecting block is attached to the Bracket. Exhaust Stopper assembly; Exhaust stopper assembly is shown in sheetlS. There are two exhaust stopper assemblies. They are positioned diametrically opposite side of casing. Each assembly comprises of stopper (3), bracket (4) and connecting block with rollers (5). The stopper can move relative to bracket only longitudinally about 2mm of distance. Bracket is fixed at one end of stopper and connecting block is fixed to bracket. The rail in cam2 is locked between the rollers in connecting block. Exhaust valve (1) is placed near it. Exhaust Valve; It is shown in sheetM. It has a rectangular head (1) with a stem (2) on it. The head"s inner radius (3) is equal to inner radius of casing. It seals the casing"s exhaust opening completely when closed as shown in the complete assembly drawing (sheet 1). Exhaust Stopper; It is shown in sheet 15. There are two exhaust stoppers with a shape of upside down "T ". It has two slots (2) at lesser wide end (3) on opposite sides. The slots are provided for inserting bracket. There is a quarter cylindrical projection (1) in the stopper for moving the exhaust valve. The width of stopper is such that it seals the gap in the casing. Length of the wider rectangular area is higher than the difference between inner radius of the casing and the minimum radius of the rotor Bracket with connecting block for Exhaust stopper; It is shown in sheet 16. The shape of bracket (3) is 90° rotated "U". The bottom hand of the bracket has a vertical rectangular cut (4) inside so that it can be inserted into the slots in stoppers. The height of the bottom hand is about 2 mm less than the height of slots in stoppers to provide relative motion. A "T" shaped block (5) is used to close the open end of bracket with stopper locked inside. Connecting block (2) has two rollers (1) which locks the rail in Cams. Cam2: It is shown in sheet 17. It is used to operate exhaust stoppers. Cam2 has a circular disk (2) that is firmly attached to the rotor"s shaft through the hole (3) in it. It has a rail like closed loop projection (1) towards the side in it. The rollers of connecting blocks, locks the rail in between them. The shape of rail is such that when rotated stoppers connected to it traces rotor"s outer profile for about 180° of rotation and stays in retracted position for the other 180°. Cross section of the rail is rectangle. Caml; It is shown in sheetl7. It is used to operate Intake stoppers. Cam2 has a circular disk (2) that is firmly attached to the rotor"s shaft through the hole (3) in it. ft has a rail like closed loop projection (1) towards the side in it. The rollers of connecting blocks,, locks the rail in between them. The shape of rail is such that when rotated stoppers connected to it traces rotor"s outer profile for about 180° of rotation and stays in retracted position for the other 180°. Cross section of the rail s rectangle. Description of assembled form The assembled form of the present invention is shown in sheetl. The rotor (2) is placed inside the casing (1) with the rotor"s shaft inside casing"s hole. Intake stoppers are placed in the slots in diametrically opposite sides of casing. Intake stopperl (4) is at the position of 100° and intake stopper2 (8) is at the position of 280°. Intake valvel (5) placed on the left side of Intake stopperl on the seats in the opening in casing and Intake valve2 (9) placed right side of Intake stopper2 on the seats in the opening in casing. Exhaust stoppers are on the diametrically opposite sides of casing. Exhaust stopperl (6) is at the position of 80° and Exhaust stopper2 (10) is at the position of 260°. Exhaust valvel (7) placed on the right side of Exhaust stopperl on the seats in the opening in casing and Exhaust valve2 (11) placed on the left side of Exhaust stopper2 on the seats in the opening in casing. Cams are attached to the rotors both axial ends. Rollers in the connecting block of Exhaust stopperl and Exhaust stopper2 is placed on both sides of rail in cam2 (3). Rollers in the connecting block of intake stopperl and intake stopper2 is placed on both sides of rail in caml. When cams rotate these rollers roll over rails, raises or lowers the stopper assemblies. A casing cover (12) is used to close the open end of casing. The stoppers in operation together with lobes of rotor form four different compartments inside engine. In sheet2 exploded view of the present invention is shown. In the drawing casing(l), rotor(2), cam2(3), caml(17), Intake stopperl (4), Intake valvel (5), Intake stopper2 (8), Intake valve2 (9), Exhaust stopperl (6), Exhaust valvel (7), Exhaust stopper2 (10), Exhaust valve2 (11), bracket with connecting block for Intake stopperl (13), bracket with connecting block for Exhaust stopperl (14), bracket with connecting block for Intake stopper2 (15) and bracket with connecting block for Exhaust stopper2 (16) are shown. Casing cover is not shown. Working procedure of the embodiment of invention Detailed description of the working procedure of the embodiment of invention with reference to drawings in sheet3, sheet4, sheet 5, sheet6: In the figure 1-4 in sheet 3, stoppers and valves position is shown for each 90° of rotation of rotor in counter clockwise direction. In the figure 1-4 in sheet 4, stoppers and valves position is shown for each 90° of rotation of rotor in the next revolution of rotor again in counterclockwise direction is shown. In sheets Valve and stopper timing is shown values in Y axis are the distance of valve or stoppers inner side fi-om center of rotor. Values in X axis are the degree of rotation of rotor"s lobel. hi sheets the operation timing of Intake valvel (1), Intake valve2 (2), Intake stopperl (3), Intake stopper2 (4), Exhaust valvel (5), Exhaust valve2 (6), Exhaust stopperl (7) and Exhaust stopper2 (8) are shown. In first diagram of sheet6 the sequence of intake (1), compression (2), Expansion (3) and exhaust (4) of 4 cycles with respect to degree of rotation of rotor are shown. In the second diagram, the cycles that happens through intake valvel (5) is grouped together. And cycles happens through intake valve2 is grouped (6) in another. In the third diagram repetition of these 4 cycles (a cycle comprises of the sequence of intake (1), compression (2), Expansion (3) and exhaust (4) ) are shown. A cycle completes in 2 revolution of rotor. And another cycle starts after 180° of rotation after the starting of previous cycle as shown in diagrams. ■Each stroke of the cycles last for 180°. There are four strokes of four independent cycles haj^pening at the same time in four different compartments inside engine. The following describes the operation of valves and stoppers to facilitate Cyclel. Cycle3 is similar to cyclel except that it starts after 360° degree of rotation of rotor after starting of Cyclel. At 100° of rotor"s lobel"s position Intake Stopperl starts operating (moving inward) tracing the outer profile of rotor. This allows Intake valvel to open allowing intake of cyclel (refer fig4 and figl in sheet3) As rotor rotates and lobel moves from 190°-280° Intake Stopperl starts retracting and pulls Intake valvel to original position at 280° intake is complete. As rotor"s lobel crosses Intake Stopper2 at 280°, hitake Stopper2 starts operating. Allowing compression of charge between rotor"s lobe2 and Intake Stopper2.(refer figS in sheets). Compression continues until lobel reaches 450° (90°). At this time all the charge is compressed inside the combustion chamber2 and ignition takes place. When lobel is at 440°(80°) rotor"s lobe2 crosses Exhaust Stopper2, the Exhaust Stopper2 starts operating tracing rotor"s outer profile (refer fig4 in sheets and fig 1 in sheet 4). Expansion takes place between lobe2 and Exhaust Stopper2. Expansion continues until lobefreaches 620° (260°) (refer figl sheetS). From 540° - 620° (180° - 260°) of lobel"s position Exhaust Stopper2 starts retracting and stays in original position at 620°. ( refer figl and fig2 in sheet4). When lobel is at 620°(260°) rotor"s lobe2 crosses Exhaust Stopperl, the Exhaust Stopperl starts operating tracing rotor"s outer profile (refer fig2 and fig 3 in sheet 4). Exhaust Stopperl pushes Exhaust valvel to open it, allowing exhaust to take place. Exhaust continues until lobel reaches 800° (80°) (refer figS sheet4). From 720° - 800° (0° - 80°) of lobel"s position Exhaust Stopperl starts retracting and pulls Exhaust valvel to close at 800° Exhaust of cycle 1 is complete. (Refer fig3 and fig4 in sheet4). The following describes the operation of valves and stoppers to facilitate Cycle2. Cycle4 is similar to Cycle2 except that it starts after 360° degree of rotation of rotor after starting of Cycle2 At 280° of rotor"s lobel"s po;ition Intake Stopper2 starts operating (moving inward) tracing the outer profile of rotor. This allows Intake valve2 to open allowing intake of cycle2 (refer fig2 and figS in sheet3) As rotor rotates and lobel moves from S60°-460° (0°-100°) Intake Stopper2 starts retracting and pulls Intake valvel to original position at 460° intake is complete. As rotor"s lobel crosses Intake Stopperl at 460°, Intake Stopperl starts operating allowing compression of charge between rotor"s lobe2 and Intake Stopperl (refer figl in sheets). Compression" dontinues until lobel reaches 630° (270°). At this time all the charge is compressed inside the combustion chamberl and ignition takes place. When lobel is at 620°(260°) rotor"s lobe2 crosses Exhaust Stopperl, the Exhaust Stopperl starts operating tracing rotor"s outer profile (refer fig2 and fig 3 in sheet 3). Expansion takes place between lobe2 and Exhaust Stopperl. Expansion continues until lobel reaches 800° (80°) (refer fig4 sheetS). From 720° - 800° (0° - 80°) of lobel"s position Exhaust Stopperl starts retracting and stays in original position at 800°. (Refer figS and fig4 in sheets). When lobel is at 800°(80°) rotor"s lobe2 crosses Exhaust Stopper2, the Exhaust Stopper2 starts operating tracing rotor"s outer profile (refer fig4 in sheet 3 and fig 1 in sheet 4). Exhaust Stopper2 pushes Exhaust valve2 to open it, allowing exhaust to take place. Exhaust continues until lobel reaches 980° (260°) (refer figl sheet4). From 900° - 980° (180° - 260°); of lobel"s position Exhaust Stopper2 starts reft-acting and pulls Exhaust valve 2 to close at 980° Exhaust of cycle2 is complete. (Refer figl and fig2 in sheet4). The following describes the operation of valves and stoppers in one revolution (360°) and state of four different compartments inside the engine. (Each compartment has one stroke of four independent cycles). At 100° of rotor"sposition as it crosses Intake Stopperl (refer fig 4. Sheet 3) Intake Stopperl starts operating, (moving inwards) tracing rotor"s outer profile. Since Intake stopperl is moved down Intake Valvel is now free to move and will be pushed down by spring. Allowing intake of cyclel (Note: A cycle consists of the sequence Intake, Compression, Expansion and Exhaust) at left side of Intake stopperl and compression of previous cycle at right side of Intake stopperl. At the same time at opposite side as Lobe2 crosses Exhaust Stopper2 (refer fig 4. sheet 3) Exhaust Stopper2 starts operating (moving inwards) tracing rotor"s outer profile. The projection in Exhaust Stopper2 pushes down Exhaust Valve2 to open it, allowing exhaust of second cycle before previous cycle at left side of Exhaust Stopper2 and expansion of cycle before previous one at right side of Exhaust Stopper2. From 10°-100° of rotor"s Lobe2"s position (refer fig 1. sheet 3) Intake stopperl will began to retract to its original position. And Intake Valvel will be pulled by the wedge like projection at the end of Intake stopperl. Intake of cyclel and compression of previous cycle will be over at 100° of rotor"s Lobei"s position. At 90 ° of rotor"s lobe2"s position combustion of previous cycle"s charge takes place at Combustion Chamberl (refer fig 2. sheet 3) From 190°-280° of rotor"s Lobel"s position (refer fig 1. sheet 3) Exhaust Stopper2 will began to retract to its original position. And Exhaust Valve2 will be pulled by the spring. Expansion of cycle before previous one and exhaust of second cycle before previous cycle will be over at 280° of rotor"s Lobel"s position. At 270° of rotor"s Lobel"s position as it crosses Intake Stopper2 (refer fig "2. Sheet 3) Intake Stopper2 starts operating (moving inwards) tracing rotor"s outer profile. Since Intake stopper2 is moved down Intake Valve2 is now free to move and will be pushed down by "spring. Allowing intake of cycle2 (Note: A cycle consists of the sequence Intake, Compression, Expansion and Exhaust) at right side of Intake stopper2 and compression of cyclel" at left side of Intake stopper2. At the same time at opposite side as Lobe2 crosses Exhaust Stopperl (refer fig 2. sheet 3) Exhaust Stopperl starts operating (moving inwards) tracing rotor"s outer profile. The projection in Exhaust Stopperl pushes dovm Exhaust Valvel to open it, allowing exhaust of cycle before previous cycle at right side of Exhaust Stopperl and expansion of previous cycle at left side of Exhaust Stopperl. From 190°-280° of rotor"s Lobe2"s position Intake stopper2 will began to retract to its original position. And Intake Valve2 will be pulled by the wedge like projection at the end of Intake stopper2. Intake of cycle2 and compression of cyclel will be over at 280° of rotor"s Lobe2"s position. At 270 ° of rotor"s lobe2"s position combustion of cyclel"s charge takes place at Combustion Chamber2 From 10°-100° of rotor"s Lobel"s position Exhaust Stopperl will began to retract to its original position. And Exhaust Valvel will be pulled by the spring. Expansion of previous cycle and exhaust of cycle before previous one will be over at 100° of rotor"s Lobel"s position. This sequence of operation of v lives and stoppers with respect to rotor"s rotation will be repeated in each revolution. 4 I Claim:- 1) A Rotary Engine comprising of a Rotor, a Casing, 4 Valves, 4 Stoppers and 2 Cams, configured such that the sequence of operation of stopper mechanism and valve mechanism together with rotor, cams and casing provide the sequence Intake Compression, Expansion and Exhaust cyclically as the rotor rotates. At 100° of rotor"s Lobel "s section as it crosses Intake Stopperl (refer fig 4. Sheet 3) Intake Stopperl starts operating, (moving inwards) tracing rotor"s outer profile. Since Intake stopperl is moved down Intake Valvel is now fire to move and will be pushed down by spring. Aiding intake of cycle (Note: A cycle consists of the sequence Intake, Compression, Expansion and Exhaust) at left side of Intake stopperl and compression of previous cycle at right side of Intake stopperl. At the same time at opposite side as Lobe2 crosses Exhaust Stopper2 (refer fig 4. sheet 3) Exhaust Stopper2 starts operating (moving inwards) tracing rotor"s outer profile. The projection in Exhaust Stopper2 pushes down Exhaust Valve2 to open it, allowing exhaust of second cycle before previous cycle at left side of Exhaust Stopper2 and expansion of cycle before previous one at right side of Exhaust Stopper2. From 10°-100° of rotor"s Lobe2"s position (refer fig 1. sheet 3) Intake stopperl will began to retract to its original position. And Intake Valvel will be pulled by the wedge like projection at the end of Intake stopperl. Intake of cyclel and compression of previous cycle will be over at 100° of rotor"s Lobe2"s position. At 90 ° of rotor"s lobe2"s position combustion of previous cycle"s charge takes place at Combustion Chamber (refer fig 2. sheet 3) From 190°-280° of rotor"s Lbbel"s position (refer fig 1. sheet 3) Exhaust Stopper2 will began to retract to its original position. And Exhaust Valve2 will be pulled by the spring. Expansion of cycle before previous one and exhaust of second cycle before previous cycle will be over at 280° of rotor"s Lobel"s position. At 270° of rotor"s Lobel"s position as it crosses Intake Stopper2 (refer fig 2. Sheet 3) Intake Stopper2 starts operating (moving inwards) tracing rotor"s outer profile. Since Intake stopper2 is moved down Intake Valve2 is now free to move and will be pushed down by spring. Allowing intake of cycle2 (Note: A cycle consists of the sequence Intake, Compression, Expansion and Exhaust) at right side of Intake stopper2 and compression of cyclel at left side of Intake stopper2. At the same time at opposite side as Lobe2 crosses Exhaust Stopperl (refer fig 2. sheet 3) Exhaust Stopperl starts operating (moving inwards) tracing rotor"s outer profile. The projection in Exhaust Stopperl pushes down Exhaust Valvel to open it, allowing exhaust of cycle before previous cycle at right side of Exhaust Stopperl and expansion of previous cycle at left side of Exhaust Stopperl. From 190?-280° of rotor"s Lobe2"s position Intake stopper2 will began to retract to its original position. And Intake Valve2 will be pulled by the wedge like projection at the end of Intake stopper2. Intake of cycle2 and compression of cyclel will be over at 280° of rotor"s Lobe2"s position. At 270 ° of rotor"s lobe2"s position combustion of cycle’s charge takes place at Combustion Chamber2 From 10°-l 00° of rotor"s Lobel"s position Exhaust Stopperl will began to retract to its original position. And Exhaust Valvel will be pulled by tiie spring. Expansion of previous cycle and exhaust of cycle before previous one will be over at 100° of rotor"s Lobel"s position. This sequence of operation of valves and stoppers with respect to rotor"s rotation will be repeated in each revolution. The performing of entire sequence of Intake, Compression, Expansion and Exhaust of one particular cycle with respect to shitake Valve 1 and another particular cycle with respect to Intake Valve2 is described in "Working procedure section". 2) A Rotary engine as claimed in claiml with the following sequence of operation of stopper mechanism together with rotor, casing and combustion chamber provide the sequence Expansion after Compression without changing rotor"s rotational direction. As the intake stopper operates the compression takes place between intake stopper and lobe of rotor into the combustion chamber. And when lobe crosses combustion chamber expansion takes place between exhaust stopper and lobe of the rotor. 3) A Rotary engine as claimed in claiml having a Rotor, a Casing, 4 Valves, 4 Stoppers and 2 Cams. The rotor is placed inside the casing and intake stoppers in the slots in diametrically opposite sides of casing. Intake stopperl is at the position of 100°and intake stopper2 is at the position of 280°. Intake valve 1 placed on the left side of Intake stopperl on the periphery of inside of casing and Intake valve2 placed right side of Intake stopper2 on the periphery of inside of casing. Exhaust stoppers are placed in the slots on the diametrically opposite sides of casing. Exhaust stopperl is at the position of 80° and Exhaust stopper2 is at the position of 260°. Exhaust valve 1 placed on the right side of Exhaust stopperl on the periphery of inside of casing and Exhaust valve2 placed on the left side of Exhaust stopper2 on the periphery of inside of casing. Cams are attached to the rotors both ax;ial ends. Rollers in the connecting block of Exhaust stopperl and Exhaust stopper2 is placed on both sides of rail in cam2. Rollers in the connecting block of intake stopperl and intake stopper2 is placed on both sides of rail in calm. When cams rotate these rollers roll over rails and raises or lowers the stopper assemblies. 4) A Rotary engine as claimed in claiml having a rotor with at least two lobes at diametrically opposite side and one central fixed shaft. 5) A Rotary engine as claimed in claiml having a casing with an internal cavity of a shape of hollow cylinder with one end closed. The closed end has a hole for inserting rotor"s shaft. The casing also has two smaller cavities for combustion chamber at diametrically opposite ends one at90° and other at 270°. It also has rectangular slots for Exhaust Valve 1, Exhaust Valve2, Exhaust Stopperl, Exhaust Stopper2, Intake Valve 1, Intake Valve2, Intake stopperl and Intake stopper2 at diametrically opposite ends. It hais ports to each of the valves from outside. 6) A Rotary engine as claimed in claiml having two exhaust stopper assembly. They are positioned diametrically opposite side of casing. Each assembly comprises of stopper, bracket and connecting block. The stopper can move relative to bracket only longitudinally about 2mm of distance. Bracket is fixed at one end of stopper and connecting block is fixed to bracket. The rail in cam2 is locked between the rollers in connecting block. 7) A Rotary engine as claimed in claiml having at least two exhaust stoppers with a shape of upside down "T Mt has two slots at lesser wide end on opposite sides. The slots are provided for inserting bracket. The width of stopper is such that it seals the gap in the casing. Length of the rectangular area is higher than the difference between inner radius of the casing and the minimum radius of the rotor. 8) A Rotary engine as claimed in claiml having at least 2 Exhaust valves. It has a rectangular head with a stem on it. The head"s inner radius is equal to inner radius of casing. It seals the casing"s intake opening completely when closed as shown in the complete assembly drawing. 9) A Rotary engine as claimed in claim 1 having 4 brackets two each for intake and exhaust stoppers. The shape of bracket is 90° rotated "U". The bottom hand of the bracket has a vertical rectangular cut inside so that it can be inserted into the slots in stoppers. The height of the bottom hand is about 2 mm less than the height of slots in stoppers to provide relative motion. A "T" shaped block is used to close the open end of bracket with stopper locked inside. 10) A Rotary engine as claimed in claim 1 having four connecting block two each for exhaust and intake stoppers. These blokes have two rollers which locks the rail in Cams. 11) A Rotary engine as claimed in claim 1 having two intake stopper assembly. They are positioned diametrically opposite side of casing. Each assembly comprises of stopper, bracket and connecting block. The stopper can move relative to bracket only longitudinally about 2mm of distance. Bracket is fixed at one end of stopper and connecting block is fixed to bracket. The rail in caml is locked between the rollers in coimecting block. 12) A Rotary engine as claimed in claim 1 having at least two intake stoppers with a shape of upside down "T ". It has two slots at lesser wide end on opposite sides. The slots are provided for inserting bracket. The width of stopper is such that it seals the gap in the casing. Length of the rectangular area is higher than the difference between inner radius of the casing and the minimum radius of the rotor. 13) A Rotary engine as claimed in claim! having at least two intake valves. It has a rectangular head with a stem on it. The head"s irmer radius is equal to inner radius of casing. It seals the casing"s intake opening completely when closed as shown in the complete assembly drawing. 14) A Rotary engine as claimed in claim 1 having two cams firmly attached to the either side of rotor. It has a rail like closed loop projection in them. The rollers of cormecting blocks, locks the rail in between them. The shape of rail is such that when rotated stoppers connected to it traces rotor"s outer profile for about 180° of rotation and stays in retracted position for the other 180°. Cross section of the rail is rectangle. Caml operates both the intake stoppers and cam2 operates both exhaust stoppers.

Documents:

0259-mas-2001 abstract-duplicate.pdf

0259-mas-2001 abstract.pdf

0259-mas-2001 claims-duplicate.pdf

0259-mas-2001 claims.pdf

0259-mas-2001 correspondence-others.pdf

0259-mas-2001 correspondence-po.pdf

0259-mas-2001 description (provisional).pdf

0259-mas-2001 description(complete)-duplicate.pdf

0259-mas-2001 description(complete).pdf

0259-mas-2001 drawings.pdf

0259-mas-2001 form-1.pdf

0259-mas-2001 form-5.pdf

0259-mas-2001 others.pdf