Wankel engine
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IT IS GOOD PRESENTATION ,WHEN YOU WANT KNOW ABOUT WANKEL ENGINGE
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Wankel engine
- 1. 4/27/2018 1
- 2. PRESENTATION SUBJECT AUTOMOTIVE ENGINES SUBJECT CODE U15AUT403 TOPIC WANKEL ENGINE GROUP NO 04 DEPARTMENT AUTOMOBILE YEAR 2nd year(2016-2020) GROUP MEMBERS 1.MONISH DEEPAK(16BAU019) 2.KARTHIKEYAN(16BAU020) 3.VIJAY SARATHY(16BAU021) 4.N.ARUN KUMAR(16BAU022) 5.M.MOHAMMED NOWFER(16BAU023) DATE 27/04/2018 SUBMITTED TO….,,, C.NAVEEN KUMAR SIR 4/27/2018 2
- 3. CONTENT OF THE PRESENTATION 1.Introduction 2.History Of Wankel Engine 3.Principle Of Wankel Engine 4.Parts Of Wankel Engine 5.Working Of Wankel Engine 6.Advantages 7.Disadvantages 8.Applications4/27/2018 3
- 4. INTRODUCTION • It is a type of ic engine • Uses as four stroke otto cycle to create a kinetic energy • It is directly convert pressure into rotary motion • It is mostly refered as rotary engine • Reuleaux triangular shape rotor with the sides somewhat flattre. • Power output higher than piston engines 4/27/2018 4 KINETIC ENERGY ROTATIONAL ENERGY TRANMISSION
- 5. HISTORY • 1588-ramelli • 1951-Dr.FELIX WANKEL for NSU MOTORENWERKE AG(149DESIGN,) • First use in northern commercial motor cycle • 1961-car MAZDA • 1970-mazda,general motors,daimler benz,peugeot • Only madza continue to develop rotary engine cars--- 1999 new car • Future of wankel engine is rather dark. 4/27/2018 5
- 6. PARTS OF WANKEL ENGINE 4/27/2018 6
- 7. PRINCIPLE OF WANKEL ENGINE Unlike a piston engine, in which the cylinder is heated by the combustion process and then cooled by the incoming charge, Wankel rotor housings are constantly heated on one side and cooled on the other, leading to high local temperatures and unequal thermal expansion 4/27/2018 7
- 8. WORKING OF WANKEL ENGINE 4/27/2018 8
- 9. WORKING OF WANKEL ENGINE 4/27/2018 9
- 10. 4/27/2018 10
- 11. ADVANTAGES 1. higher revolutions per minute 2. a very few moving parts 3. approximately 1/3rd of the size of the piston engine 4. weighs almost 1/3rd of the weight of the piston engines. 5. Vibration less engine 6. A high power rpm smooth with compact engine 7. Quiet running 8. Reliability 9. Better fuel economy 4/27/2018 11
- 12. DISADVANTAGES 1. As unburnt fuel is in the exhaust stream, emissions requirements are difficult to meet. 2. The combustion is slow as the combustion chamber is long, thin, and moving. 3. As each section has temperature differences, the material expansion of housing is different at different region. 4. POOR FUEL EFFICIENCY 5. EXAUST EMISSIONS 6. MANUFACTURING COST HIGHEST 7. LOW COMPRESSION RATIO4/27/2018 12
- 13. APPLICATIONS 4/27/2018 13 Motor sports Motor cycles Range extender Air crafts Auxilary power units
- 14. 4/27/2018 14
- 15. 4/27/2018 15
Editor's Notes
- Rotor :- The rotor has three convex faces which acts like a piston. The 3 corners of rotor forms a seal to the outside of the combustion chamber. It also has internal gear teeth in the centre on one side. This allows the rotor to revolve around a fix shaft. Housing :- The housing is epitrochoidal in shape(roughly oval). The housing is cleverly designed as the 3 tips or corners of the rotor always stay in contact with the housing. The intake and exhaust ports are located in the housing. Inlet & exhaust ports :- The intake port lets fresh mixture enter into combustion chamber & the exhaust gases expel out through outlet/exhaust port. Spark plug :- A spark plug delivers electric current to the combustion chamber which ignites the air-fuel mixture leading to abrupt expansion of gas. Output shaft :- The output shaft has eccentric lobes mounted on it, which means they are offset from centreline of the shaft. The rotor is not in pure rotation, but we need these eccentric lobes for pure rotation of the shaft. Note :- The output shaft is a thing which can’t be explained completely in words. It is quite difficult to imagine it’s contribution in the working. this video link might help you to understand it.
- Intake :- When a tip of the rotor passes the intake port, fresh mixture starts entering into the first chamber. The chamber draws fresh air until the second apex reaches the intake port & closes it. At the moment, fresh air-fuel mixture is sealed into first chamber & is being taken away for combustion. Compression :- The chamber one(between corner 1 to corner 2) containing the fresh charge gets compressed due to shape of the engine by the time it reaches to spark plug. While this happens, a new mixture starts entering into the second chamber(between corner 2 to corner 3). The four strokes of the engine with the corners numbered. Combustion:- When the spark plug ignites, the highly compressed mixture expands explosively. The pressure of expansion pushes the rotor in forward direction. This happens until the first corner passes through the exhaust port. Exhaust :- As the peak OR corner 1 passes exhaust port, the hot high pressure combustion gases are free to flow out of the port. As the rotor continues to move, the volume of chamber goes on decreasing forcing the remaining gases out of port. By the time the corner 2 closes the exhaust port, corner 1 passes by the intake port repeating the cycle. While the first chamber is discharging gases, the second chamber(between corner 2 to corner 3) is under compression.Simultaneously, chamber 3(between corner 3 to corner 1) is drawing fresh mixture. This is the beauty of the engine – the four sequences of the four stroke cycle, which occur consecutively in a piston engine, occur simultaneously in the Wankel engine, producing power in a continuous stream.