SIX STROKE ENGINE

CONTENTS:

1) Introduction to IC Engine
2) Classification of IC Engine as per strokes.
3) Definition of 6 Stroke engine.
4) Currently notable 6 Stroke Engine.
5) Comparison between 6 Stroke & 4 Stroke Engine.
6) Thermodynamic Advantages of 6 Stroke Engine with graphical representation

IC Engine:

I.C.Engine is a device which uses chemical energy of fuel & it is transformed into thermal energy by combustion to produce mechanical work.
Classification of I.C.Engine :-

1) According type of fuel used
a)Petrol b)Diesel

2) According to type of ignition
a)Spark ignition b) Compression ignition

3) According to number of cylinder
a)Single cylinder b) Multi cylinder Engine

4) According to arrangement of cylinder
a)Vertical engine 2) Horizontal engine 3) Radial engine

5) According to number of stroke
a) 2 stroke engine b) 4 stroke engine




Two Stroke Engine:

It is called 2 stroke engine because of one revolution of crank OR 2 stroke of piston.It Consists of piston ,crank, connecting rod,inlet & outlet Port’s & etc....
The Major disadvantage of 2 stroke engine is that both inlet & outlet valve opens simultaneously ,so that burnt fuel , fresh air & fuel mixture burnt simultaneously therefore fresh air & fuel may be exhausted without doing any work & also this may leads to high pollution & this what reason why “GOVT OF INDIA” Banned manufacturing of 2 stroke engine.

Four-stroke engine:

It is called 4 stoke engine because of 4 stroke of piston or 2  revolution of crank. The four stroke are Suction,compression,power,& exhaust stroke.

Parts Of 4 stroke engine:-

1)Cylinder 2)crank 3) piston 4)crank shaft 5)Connecting rod 6)fly wheel 7) Water jacket

Six-stroke IC Engine:

The Six stroke engine is also a type of I.C..Engine in which heat loss from 4 stroke engine uses to an additional power and exhaust stroke of the piston in the same cylinder.
Designs use either steam or air as the working fluid for the additional power stroke.The pistons in this type of six-stroke engine go up and down three times for each injection of fuel.

Currently Notable Six Stroke Engine are:-
1. Crower six stroke engine.
2. Beare Head Six Stroke engine.
3. Bajulaz six stroke engine.



CROWER SIX STROKE ENGINE:-

In a six-stroke engine patented in the U.S. by Bruce Crower,
After the exhaust stroke, fresh water is injected into the cylinder, and is quickly turned to superheated steam, which causes the water to expand to 1600 times its volume and forces the piston down for an additional stroke.Here the major disadvantage in this engine is that before injecting water engine temperature should be optimum so that all amount of water is converted steam other wise the engine get damaged soon........ 
This design also claims to reduce fuel consumption by 40%.
Crower's six stroke engine features:-
1) No cooling system required
•2)Improves a typical engine’s fuel consumption
3)Requires a supply of distilled water to act as the medium for the second power stroke.
This design also claims to reduce fuel consumption by 40%.
Crower's six stroke engine features:-
1) No cooling system required
•2)Improves a typical engine’s fuel consumption
3)Requires a supply of distilled water to act as the medium for the second power stroke.

2) Bajulaz six stroke engine:-

The Bajulaz six stroke engine is similar to a regular combustion engine in design. This Engine was invented in 1989 by the Bajulaz S A ... Here also first 4 stroke is similar to normal to 4 stroke engine where as at 5th stroke fresh air inserted engine cylinder & at 6th stroke air is exhausted..... Compulsory air filter is required..  

Bajulaz six stroke engine features:-

1)Reduction in fuel consumption by at least 40%

2)Two expansions (work) in six strokes

3)Dramatic reduction in pollution

4)Liquefied Petroleum Gas

5)Costs comparable to those of a four-stroke engine combustion engine in design.
The Bajulaz six stroke engine is similar to a regular combustion engine in design. This Engine was invented in 1989 by the Bajulaz S A .

Bajulaz six stroke engine features:-

1)Reduction in fuel consumption by at least 40%
2)Two expansions (work) in six strokes
3)Dramatic reduction in pollution
4)Liquefied Petroleum Gas
5)Costs comparable to those of a four-stroke engine combustion engine in design.

3) BEARE HEAD SIX STROKE ENGINE

Malcolm Beare is 53 year Patent from old Australian wheat farmer is indeed an original thinker, in spite of a day job apparently so far removed from the world of mechanics. For the past 23 years, while working his 1300 hectare spread in the sun-drenched outback of South Australia, Malcolm has had plenty of time to reflect on various aspects of his alternative profession. The Beare Engine is a completely new development of the internal combustion engine.
 This engine simply replaces the conventional Four Stroke Engines Cylinder Head. The manufacturers Four Stroke bottom end remains unchanged... Here the concept is very simple 4+2=6 at bottom 4stroke where at top 2stroke & it is connected by means v-belt....

The net result is:

1)Power/torque increases of 35%.
2) Simpler and less expensive manufacturing and tooling
3) Reduction of cylinder head reciprocating parts
4) Lower maintenance costs due to less wearing parts.

Valve timing  for ducati based reed-valve 90° V-twin:-
  

Intake open 20°  BBDC 520°  close 60°  ABDC 240° 
Duration 440°  (this is not a mistake) 
Maximum port area at 20°  ATDC
Exhaust open 40°  BBDC 500°  close 60°  ATDC 60° 
Duration 280° 
Maximum port area at TDC 0° 
Overlap 260°  (also not a mistake)
The reed valves control the beginning of intake according to engine demand.(APPROX)

ENGINE TYPE:-

Air-cooled opposed-piston rotary

Compression ratio:-   10.6 : 1 (approx)

  



Comparison between 6 Stroke & 4 Stroke Engine with graphical representation

 

Recent scenario of this engine is that Fuel Consumption is well known to everyone. Everyday

technical people talk about the depleting Fuel sources and Exhaust hazards.

Particularly about the Diesel engines find their importance more than the Petrol
engines due to their operating cost and Fuel consumption But Diesel engines have
their demerits in the area of Exhaust and Power loss. Necessary steps have to be
taken in order effectively use the Fuel available. We have brought the UTILIZATION
OF SIX STROKE ENGINES which runs on DUAL FUEL to your view. The Six
Stroke Engine’s Principle resembles the Double Stage Compressor. By this way
effective Compression is done and the need for Turbocharger is completely
neglected. We have also considered Cylinder’s position in Six Stroke engine. Also
the Pollution (NOx) emitted by the Diesel Engines is also taken into account. We
found the solution in the form of Dual fuel and Exhaust Gas Recirculation system.
The Combusting Temperature is above 2000 F and this is the prime reason for NOx
Emission. So an Alternative Fuel which can be combusted below the level of Diesel
should be used. Moreover the availability and production cost must be taken into
consideration. We found Ethanol as a better alternative for Diesel. The Cold Starting
of the Engine is made easier using GLOW PLUG which is used to preheat the
Charge coming inside the Combustion Chamber....