This document summarizes and compares a 4-stroke and 6-stroke internal combustion engine. It explains that a 6-stroke engine adds two additional strokes - an air intake stroke and air exhaust stroke - to the standard 4-stroke cycle. This captures normally wasted heat to power an additional piston stroke, thereby increasing fuel efficiency by up to 50%. The 6-stroke engine also generates less pollution and heat compared to a 4-stroke while maintaining similar power levels. In conclusion, 6-stroke engine technology promises more efficient use of fossil fuels and could help transition to an era with limited oil reserves.

1. Presented by – Ravi Kumar

2. CONTENTS
 ABSTRACT
 INTRODUCTION
 WORKING
 VOLUME ANGLE DIAGRAM
 ADVANTAGES
 PERFORMANCE
 CONCLUSIONS

3. *Modern world thrives on heat energy used in different
forms.
*Automobile industries is ever-growing industry.
*95% of the automobile run on IC engines which are
powered by fossil fuels.
*Aim of thermal is to convert the heat energy to
mechanical energy.
*Efficiency of automobile is 30%.
*Paper describes the potential IC engine.
* To meet tomorrows challenges.

4. *Otto cycle theoretically represents best option for an
IC engine cycle.
*Fuel energy is converted to heat at constant volume ,
when fluid is at maximum compression.
*Two technical modifications in 4-stroke to 6-stroke.
*Six stroke engines captures the wasted heat from the
4-stroke Otto cycle , creates hot air and cools engine
by providing free power stroke.

6. *Fuel/air valves opens the piston moves down , which draws
air and fuel into the chamber.
*Valve closes as the piston moves back up , putting the
air/fuel mixture under pressure.
*Mixture is then ignited , causing a small explosion.
*Exhaust valves opens the piston moves back up once again ,
pushing the by products of the fuel explosion out of the
chamber. This leaves the piston back in its starting position

7. *Four stroke engine after the exhaust stroke again the
suction stroke take place.
*Engine has some heat energy left in it , which is not
utilized.
*To cool, the engine radiator is used.
*The engine harnesses normally waste heat energy by
creating steam inside the combustion chamber.
*Engine runs on normal 4-stroke engine followed by
air suction stroke and air exhaust stroke.

8. The six stroke engine as the name implies
have six strokes
Suction.
Compression.
Power.
Exhaust.
Air Suction.
Air Exhaust.

10. *The first four strokes are normal to that of a four-stroke
petrol engine, the fifth stroke i.e. air suction and sixth stroke
ie. air exhaust; these two additional strokes makes it a six
stroke engine. These additional strokes can be called as
buffer strokes. In a six stroke engine we will get one power
stroke or you can make it this way, as in a 6 stroke engine
with one power stroke, the crankshaft rotates 1080 degrees
compared to 720 degrees of that of a 4 stroke engine. The 6
stroke engine can make an addition of 50% of crank rotation,
compared to the 4 stroke engine. Theoretically 50% more
travel distance can be achieved with the same engine in six
strokes, compared to four strokes. That is 50% more saving.

11. The fresh air is injected into the cylinder during the exhaust
stroke, which expands by heat and therefore forces the piston
down for an additional stroke. The valve overlaps have been
removed, and the two additional strokes using air injection
provide for better gas scavenging. The engine seems to show
50% reduction in fuel consumption and dramatic reduction in
air pollution. Its Power-to-weight ratio is slightly less than that
of a four-stroke gasoline engine. The engine can run on a
variety of fuels, ranging from gasoline and diesel fuel to LPG.
An altered engine shows a 65% reduction in carbon monoxide
pollution when compared with the four-stroke engine from
which it was developed.

14. ADVANTAGES
Better Fuel Economy.
Less pollution.
Less heat generation.
Internally cools and cleans inside the combustion
chamber.
Extended Oil Life.
Using the six stroke engine in a hybrid electric vehicle
can increase the fuel economy of the vehicle.
Engine can be developed to operate with any kind of fuel
like petrol, diesel, CNG, LPG etc.

15. * Beare Head 6 Stroke Engine is thermodynamically more
efficient, because the change in volume of the Beare Engine
Power Stroke is greater than the intake, compression, &
exhaust strokes.
*The compression ratio of the Beare Dual Piston Engine can be
greatly increased because of the absence of hot spots in the
combustion chamber.
*The Beare Engine’s rate of change in volume during the critical
combustion period is less than in a conventional 4stroke.
*The absence of valves within the combustion chamber allows
greater Beare Engine design freedom.
*A one-piece Beare Engine casting from crankshaft to upper
shaft becomes feasible. No head gasket needed, cheaper to
tool and produce.

16. *The world now thrives on fossil fuels, but it is an exhaustible
resource. We humans will surely move to an age where there
will be no fossil fuel left for consumption and we must try to
postpone it by using the available fossil fuel efficiently, so
that we can prepare ourselves to face that era.
*The two engines discussed in the above paper promises to
use the available fossil fuel in an efficient manner. The
engines may have some flaws in it which can be eliminated
as time progresses. We are sure that these engines will rule
the future.

17. THANK
YOU