This document discusses the Duke engine, which is a type of reciprocating engine with pistons arranged around an output shaft parallel to the shaft. The key advantage is the compact, cylindrical design with cylinders arranged parallel to the crank shaft. The main elements are the barrel, which refers to the cylindrical shape, and the swash plate, which translates rotating shaft motion to reciprocating piston motion. Testing has shown the Duke engine can be up to 19% lighter and 36% smaller than conventional engines while maintaining comparable performance. It can run on various fuels and has applications in vehicles, marine uses, and power generation due to its advantages of high efficiency, low vibration, and compact size.
3. INTRODUCTION
DUKE ENGINES are a type of reciprocating engine with pistons arranged
around an output shaft with their axes parallel to the shaft.
Barrel refers to the cylindrical shape of the cylinder group .
whilst the Z-crank alludes to the shape of the crankshaft.
The key advantage of the axial design is that the cylinders are arranged in
parallel around the output/crank shaft in contrast to radial and inline
engines, both types having cylinders at right angles to the shaft.
4. it is a very compact, cylindrical engine, allowing variation in compression
ratio of the engine while running.
In a swashplate engine the piston rods stay parallel with the shaft, and piston
side-forces that cause excessive wear can be eliminated almost completely.
cam engine, replaces the plate with one or more sinousoidal cam surfaces.
Vanes mounted parallel to a shaft mounted inside a cylindrical 'barrel' that
are free to sliding up and down ride the sinuous cam.
5. main ELEMENTS OF DUKE ENGINES
Barrel
Swashplate (or) wobble-plate
6. BARREL
Barrel refers to the cylindrical shape of the cylinder group (result
of the pistons being spaced evenly around the central crankshaft
and aligned parallel to the crankshaft axis)
7. SWASH PLATE
• A swashplate is a device used in mechanical engineering to translate the
motion of a rotating shaft into reciprocating motion,
or to translate a reciprocating motion into a rotating
one to replace the crankshaft in engine designs.
8. ADVANCED STAGE OF DEVELOPMENT
Multi cylinder engines are operational and have been tested in Australia,
Europe and USA.
The Duke Engine has 5cylinders, 3 spark plugs,
4 stroke internal combustion engine platform ,
with its unique axial arrangement .
9. HUGE WEIGHT AND SIZE SAVING
• In comparision made to conventional IC engine with similar displacement,
the Duke engine was found to be up to
19% LIGHTER and 36 SMALLER.
10. Offers wide fuel flexibility
• This engine can be run on any suitable spark ignition fuel.
Kerosene/Jet A1 operation has been successfully tested.
• It is expected with further development to be able to
operate on all appropriate fuels, including
Ethanol/Methanol and blends, Bio ethanol, LPG, CNG,
Hydrogen, Kerosene and Diesel.
12. ADVANTAGES
• High Thermodynamic Efficiency
• Complete Fuel Flexibility, (runs on any suitable spark ignition fuel)
• Neglible 1st and 2nd order Vibration
• Huge Weight and Size savings
• Less complex internal combustion engine
13. APPLICATIONS
• Aerodynamically friendly cylindrical shape, with output shaft on centre line.
• Direct drive low-power or geared high-power options.
• Multi fuel options.(Automotive gasoline with low octane requirements. Compatible with
100LL avgas.)
• Used formulae 1 race cars
• Marines
• Air drafts,automobiles and power generation.
14. CONCLUSION
• • Part-load fuel economy is comparable with modern conventional engines
…
• Full-load performance is comparable with modern conventional engines
without performance enhancing technologies such as cam phasing and
switchable intake systems
• Motored engine friction falls within the range of current conventional
engines.
• Exhaust temperature at part-load is high compared to conventional engines
– this might prove to be an advantage for catalyst light-off in automotive
applications…
