The green engine is one of the most interesting discoveries of the new
millennium. It has got some unique features that were used for the first
time in the making of engines. This engine is a piston less one with
features like sequential variable compression ratio, direct air intake,
direct fuel injection, multi-fuel usage etc. The efficiency of this
engine is high when compared to the contemporary engines and also the
exhaust emissions are near zero. The significance of the engine lies in
the efficiency when the present world conditions of limited resources
of energy are considered. Prototypes of the engine have been developed.
Generators have been produced with the green engine.
As earlier mentioned, the Green engine is a six phase, internal
combustion engine with much higher expansion ratio. The term phase is
used instead of stroke because stroke is actually associated to the
movement of the piston. The traveling of the piston from bottom dead
centre to the top dead centre or vice versa is termed a stroke. But, in
this engine pistons are absent and hence, the term phase is used. The
six phases are: intake, compression, mixing, combustion, power and
The engine comprises a set of vanes, a pair of rotors which houses a
number of small pot-like containers. It is here, in these small
containers that compression, mixing, combustion are carried out. The
engine also contains two air intake ports, and a pair of fuel injectors
and spark plugs. The spark plugs are connected in such a system so as to
deactivate them, when a fuel which does not need sparks for ignition is
used. The rotor is made of high heat resistance and low expansion rate
material such as ceramic. Whereas, the metal used is an alloy of steel,
aluminium and chromium.
Even though the engine is of symmetric shape, the vanes traverse an
unsymmetrical or uneven boundary. This shape cannot be compromised as
this a result of the path taken by the intake and exhaust air. This
uneven boundary is covered by the vanes in a very unique fashion. The
vanes are made in such a way that it comprises of two parts: one going
inside a hollow one. At the bottom of the hollow vane is a compressive
spring. On top of this spring is mounted the other part of the vane.
Now, let us come to the working of the engine.
working of green engine
green engine
1 Intake
The air arrives to the engine through the direct air intake port in the
absence of an air inlet pipe, throttle and inlet valves on the air
intake system. A duct is provided on the sides of the vane and rotor.
The duct is so shaped that when the air moves through, strong swirls
generate when it gets compressed in the chamber. The air pushes the vane
blades which in turn impart a proportionate rotation in the small rotor
which houses the chambers. The inlet air duct ends with a very narrow
opening to the chamber.
2 Compression
The rushing air from the duct is pushed by the blades into the small
chambers in the rotor. The volume of these chambers is comparatively
very small. Naturally, the compression obtained by such a procedure is
very satisfactory. As earlier mentioned, the compressed air is in a
swirling state, ready to be mixed with the fuel which will be injected
into the chamber when it will be place before the injector by the
already rotating rotor.
3 Mixing
As soon as the chamber comes in front of the fuel injector, the
injector sprays fuel into the compressed air. Because of the shape of
the chamber, the fuel mixes well with the compressed air. The importance
of ideal mixing leads to deletion of CO emission. And also because of
the strong swirling, a centrifugal effect is exerted in the air-fuel
mixture. Moreover, the rotation of the burner, makes this centrifugal
effect all the more effective. Mixing phase has enough time to produce
an ideal air-fuel mixture as the spark plug is positioned towards the
other end of the rotor or burner.
4 Combustion
As the chamber rotates towards the end of its path, it is positioned
before the spark plug. A spark flies from the plug into the air-fuel
mixture. Because of the mixing phase, the air-fuel mixture is denser
near the spark plug, thereby, enabling lean-burning of the charge and
also a uniform flame front. As soon as the whole charge is ignited, the
burner rotates to position itself in front of the narrow exit.
5 Power
The expanded gas rushes out of the chamber through the narrow opening,
thereby pushing the name in the process. The sudden increase in volume
ensures that more power is released. Or in other words, the thermal
energy is fully utilized.
6 Exhaust
As the thermal energy is fully utilized, the exhaust gases bring along
comparatively less heat energy. This mainly helps in the thermal
efficiency of the engine. It raises the engineâ„¢s thermal efficiency
and also because of the complete burning of the charge, poisonous gases
like CO are absent in the exhaust emissions.ADVANTAGES Of Green Engine
As obvious from the technical features which include effective
innovations, the advantages of the Green engine over the contemporary
piston engines are many.
1 Small Size and Light Weight
As Green engine is very compact with multi-power pulses, the size and
weight could be 1/5 to 1/10 of the conventional piston engines on same
output. Its power to weight ratio could be more than 2 hp per pound
without supercharge or turbo charge.
2 Limited Parts
There are only some dozens of parts easy to be manufactured in the engine structure.
3 High Efficiency
Because many great innovations are being employed in the engine design
such as: direct air intake, sequential variable compression ratio, super
mixing process, constant volume combustion, controllable combustion
time, high working temperature of the burner, high expansion ratio and
self adapting sealing system etc., the thermal efficiency of the engine
could be potentially as high as 65 %, even more if water add-in
technology is to be considered.
4 Multi-fuels
Due to six phases of working principle, super air fuel mixing process
and constant volume combustion with controllable time, the Green engine
becomes the only real multi-fuel engine on our planet; any liquid or gas
fuels can be burnt well. Also it would be ideal to coal powder if
special anti-wearing material is employed.
5 Near-zero Emissions
With perfect air-fuel mixture, complete combustion under lower peak
temperature and free of quenching effect, the emission of CO, HC and
NOx could be near zero, thereby, a catalytic converter could be not
required at all.
6 Smooth Operation
Due to inherence of good dynamic and static balance the performance of the Green engine is as smooth as an electric motor.
7 Fast Accelerating Response
Direct injection, little rotating inertia and deleted reciprocating
motion can characterize the Green engine with operating at a very fast
accelerating response.


The Green engineâ„¢s prototypes have been recently developed, and also
because of the unique design, limitations have not been determined to
any extent.Download Report:Seminar On Green Engine report download 
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