WELCOME
DEPARTMENT OF MECHANICAL ENGINEERING SRINIVASA RAMANUJAN
INSTITUTE OF TECHNOLOGY
BY P.MANIKANTA (134G1A0351)
INTRODUCTIONDUKE ENGINES are a type of reciprocating enginewith
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.
it is a very compact, cylindrical engine, allowing variation
incompression ratioof 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
moresinousoidalcamsurfaces.Vanes mounted parallel to a shaft
mounted inside a cylindrical 'barrel' that are free to sliding up
and down ride the sinuous cam.
main ELEMENTS OF DUKE ENGINESBarrelSwashplate (or)
wobble-plate
BARRELBarrel 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)
SWASH PLATE Aswashplateis 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.
ADVANCED STAGE OF DEVELOPMENTMulti 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
.
HUGE WEIGHT AND SIZE SAVINGIn comparision made to conventional
IC engine with similar displacement, the Duke engine was found to
be up to 19% LIGHTER and 36 SMALLER.
Offers wide fuel flexibilityThis 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.
WORKING OF DUKE ENGINES
ADVANTAGESHigh Thermodynamic EfficiencyComplete Fuel
Flexibility, (runs on any suitable spark ignition fuel)Neglible 1st
and 2nd order VibrationHuge Weight and Size savingsLess complex
internal combustion engine
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
carsMarines Air drafts,automobiles and power generation.
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
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