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Duke Engines- the future of Automobiles
With the
increasing technology, we are able to design more and more efficient engines.
Out of all, Dukes engine (an engine designed by New Zealand Company Duke) is
the most efficient and intriguing one.
Axial
engines
In
conventional engines, the axes of cylinders are arranged in a fashion
perpendicular to that of crankshaft. There are two major problems with these
engines
1. These conventional engines occupy too much of space and
also do not allow variation in compression ratios.
2. In every
conventional IC engine, some of the air-fuel mixture is injected during the
exhaustion stroke. This results in wastage of fuel.
In
order to overcome this problem, axial engines were introduced(axis of cylinders
is parallel to that of crankshaft). But, the axial engines had shown
lesser efficiency. With the invention of Duke Engine, the field of axial
engines was revolutionized. Light weight and higher efficiency are its
remarkable features.
How is it
different from conventional engines?
A Duke
engine weighs half of the weight of the normal engine and even the number of
components is prodigiously decreased. Duke
engine has achieved excellent results with an axial engine prototype that
completely does away with valves, with excellent power and torque from an
engine much smaller, lighter and simpler than the existing technology.
The most
immediate advantages of the Duke Engine are its size and weight when compared
to late model conventional internal combustion engines. The current prototype
Duke 3-litre engine is up to 19% lighter than the conventional engines. For
example, the significant weight contributed by the many fasteners in the
developmental engines would not be present in a production version. It occupies
1/3rd of shipping box.
Similarly, a 'shrink wrap' measurement of the volume of the comparison engines
showed this engine has up to a 36% smaller volume.
The mechanism used is called swash plate mechanism.
Design
The design
of Duke Engine is completely different from that of conventional engines. It is
a modification of z-engines. It is highly remarkable that it offers great
freedom to the designers as it consumes less space. Duke engine is presently
made as 3 litre, 4-stroke with 5 cylinders and with just 3 spark plugs.
Working
The Duke
engine is an axial design, meaning that its five cylinders encircle the drive
shaft and run parallel with it. The pistons drive a star-shaped reciprocator,
which rotates around the drive shaft, kind of like a spinning coin coming to
rest on a table.
Advantages
The basic
advantages of this engine are
* Smaller & lighter engine
* Smooth
running
* Vibration
free
* Fuel flexibility
* No
power loss from cams/valves
* Valve-less porting giving scope
for freedom of design
* Adjustable compression ratios
* Reduce number of compression banks
* Almost perfect sinusoidal motion
allowing connecting rods to move freely.
The future of
engine technology relies with this type of engines. With the limited natural
gas resources, the efficiency of the engines has to be increased to a larger
extent. And also the engine space has to be decreased to a greater extent in
order to increase the speed and other features. Hence, this engine proves to be
very useful in doing so. However, this engine is presently designed for 3 liter
capacities only. Within ten years, Duke might be able to design for all types.
Whatever may be, this surely is the revolution in the field of automobile
engineering.
Nice in gen
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