Transcript Wankel Rotary Engine - Rutgers School of Engineering

Wankel Rotary Engine
Andrew Bakun
Brian Menz
Ahmad Mahmoud
Jacek Foltynski
Simon Lee
Why the Wankel?
• To further our modeling skills
• Obtain a better understanding of the workings
of the rotary engine and the thermodynamic
cycles that go on within
• Transmission was also a challenging piece of
machinery
• Good example of thinking outside the box
• To inform people that there are alternatives to
the conventional four stroke cylinder engine
History
• Designed by German engineer Felix
Wankel in 1954
• Manufactured mainly by Mazda, currently
used in Mazda RX-8
• Extremely lightweight and small when
compared to engines with similar power
output
• Used in a lot of aircraft
• Main disadvantage is fuel inefficiency
Cylinder vs. Rotary Engines
• Uses pistons to regulate
intake and exhaust of
fuel and gas.
• All four strokes, intake
compression,
combustion and exhaust
occur in same cylinder.
• Pistons continually
reverse direction
creating more wear and
tear on the engine
• Bad power to weight
ratio in comparison
• Lower rev limit
• Has a spinning rotor that
creates three separate
chambers and regulates the
inflow and outflow of gasses.
• Each chamber draws in air
and fuel, is compressed,
ignited and combusted then
expelled creating power while
at the same time forcing the
other two chambers to do the
same.
• Rotors move in a continuous
direction making it smoother
• Only about three moving parts
creating less friction and less
possibility for error
Present Day Application
Stroke Animation
•
•
•
•
Intake
Compression
Ignition/Combustion
Exhaust
Intake and Compression
Combustion and Exhaust
Inner Workings
Exploded View
Engine in Action
Challenges & Difficulties
• Transmission
– Many moving parts
– Gear ratios were very difficult to get right
– Constraints started conflicting
• Engine
– Measurements for rotor pieces and rotor housing were difficult
to obtain
– Some pieces needed to be generated by equations
– Interference between housing and rotor was an issue
– Inserting gear constraints between all moving parts was
difficult to get right
• Assembly
– Pieces needed to be continually adjusted to fit together
properly
Summary
• The Wankel Rotary engine is still a promising
piece of technology
• Mazda continues to spend money on the
concept with the hope of improving its fuel
efficiency
• There are also several other types of rotary
engines that run on various types of fuel
• We utilized and furthered all the skills taught to
us in ProE class including assembly,
constraints, sweeps, blends, gear connections,
animations
Thanks Ray