The document summarizes a seminar presentation on the quasi turbine engine, a proposed new type of rotary engine. It describes some limitations of current reciprocating and Wankel rotary engines and then outlines the history and design of the quasi turbine engine. The quasi turbine uses a rhomboidal rotor to provide compression and expansion like a Wankel engine but allows higher volume ratios through hinged edges. It produces high torque at low RPM with fewer parts, less noise/vibration, and higher efficiency than other engine types. While still in development, the quasi turbine shows promise for applications requiring power-to-weight ratio like aviation and may see broader use in the future.

1. SEMINAR
ON
QUASI TURBINE ENGINE
THE NEXT GENERATION ROTARY ENGINES
Presented by,
Abhishiq majeed
Department of Mechanical Engineering ,SSET

2. CURRENT TECHONOLGY AVAILABLE
Reciprocating engines
•4 stroke engines makes positive torques only 17% of time and drags 83% of time
•Many reciprocating parts-problem in balancing forces
•Higher hydrogen emissions-pollution
•The unbalanced inertia force and resulting slap can cause noise and vibrations
•Thermal efficiency is low

3. ROTARY ENGINES(WANKEL ENGINE)
•Very slow combustions
•Has problems in rotor sealing
•High emissions-pollution
•Less fuel efficiency

4. QUASI TURBINE -HISTORY
 Invented by group of 4 researchers, leaded by Dr. Gilles Saint Hillarie
 It was patented in 1996

5. WHAT IS QUASI TURBINE
 The Quasi turbine engine is a proposed piston less rotary engine using a
rhomboidal rotor whose sides are hinged at the vertices. The volume enclosed between
the sides of the rotor and the rotor casing provide compression and expansion in a
fashion similar to the more familiar Wankel engine, but the hinging at the edges allows
the volume ratio to increase . It is a crank less engine and produces high torque at low
RPM.

6. CONSTRUCTION
Two types of quasi turbine engine models
•Without carriages
•With carriages

7. Quasi Turbine Model Without
Carriages
 An oval housing
 Four sided rotor
 Inlet and exhaust port
 Spark plug

8. Quasi turbine Model with Carriages
 4 carriages
 Each carriage consist 2 wheels
 Each blade has a filler tip and traction slots
 A pivot forms the end of each blade

9. WORKING
 INTAKE
which draws in a mixture of fuel and air
 COMPRESSION
which squeezes the fuel - air mixture into a smaller volume.
 COMBUSTION
which uses a spark from a spark plug to ignite the fuel.
 EXHAUST
which expels waste gases (by-products) from the engine.

10. QUASI ENGINE WITHOUT CARRIAGES

11. QUASI ENGINE WITH CARRIAGES

12. OUTPUT MECHANISIM
 The coupling arm is fitted to the traction slots
 The output shaft is connected to the coupling arm

13. ADVANTAGES
 Simple design and small size
 Less noisy
 Less vibrations are produced because the engine is perfectly balanced
 High thermal efficiency
 Better conversion and transmission of mechanical energy
 Better torque continuity
 Faster acceleration
 Higher torque at lower RPM
 Nearly oil free operation
 Fewer moving parts so less wear and tear
 Compatible with photo detonation
 Multi fuel ability

14. LIMITATIONS
 The quasi turbine is built with aluminum and cast iron , Differential thermal expansion or
contraction in material lead to some incidences of leakage
 Construction of rotor is bit difficult.
 The quasi turbine is still in infancy. It is not used in real world applications .

15. APPLICATIONS
 Aviation industry- High power-to-weight ratio
 No vibration -Chainsaws,
 Air Compressors, Supercharger
 Military vehicles
 Pneumatic engine
 Pneumatic pumps

16. CONCLUSION
I conclude just by saying that in the near future we would definitely see Quasi turbine used
in more than just your car.
WELCOME TO A POST PISTON ENGINE ERA !