This document discusses the six-stroke engine, including its types and working. The six-stroke engine incorporates an additional stroke to the conventional four-stroke engine, introducing a second power stroke. There are three main types - the Crower, Beare Head, and Bajulaz engines. The Crower design injects water after the exhaust stroke to produce steam for an additional power stroke, while reducing fuel consumption by 40%. The Bajulaz engine provides two expansions in six strokes, dramatically reducing pollution while using multiple fuel types, and maintains costs comparable to a four-stroke engine. Six-stroke engines could potentially reduce fuel consumption and pollution levels without significant performance impacts.

2. In this seminar we discuss about the six stroke
engine. It include Introduction, the types of six stroke
engine than how to work this six stroke, Factors
contributing to increased thermal Efficiency, Reduced
Fuel Consumption and Pollutant Emission Advantages
& Disadvantages of this engine. And last Conclusion
of this seminar: SIX STROKE ENGINE.

3.  Introduction
 Types of Six stroke Engine
 Working of Six stroke engine
 Advantages & Disadvantages
 Conclusion
 Reference

4. Nikolaus August Otto first designed what is
known as the Otto engine or simply the 4 stroke internal
combustion engine. Conversion of heat energy liberated
by the combustion of the fuel into mechanical energy
which rotated the crankshaft was the basic principle of
this engine. The 4 stroke engine worked on the principle
of the Otto cycle .The 4 stroke engine comprises of the
intake stroke, compression stroke, power stroke and
finally the exhaust stroke. Fuel was injected in the
intake stroke and power from the fuel was derived in the
3rd stroke.

5. There are three types of six stroke Engine.
1. Crower six stroke engine.
2. Beare Head Six Stroke engine.
3. Bajulaz six stroke engine.
The details of this three types of six stroke Engine
are given below:-

6. 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.
This design also claims to reduce fuel consumption by
40%.
Crower's six stroke engine features:-
· No cooling system required
· Improves a typical engine’s fuel consumption
· Requires a supply of distilled water to act as the medium for the
second power stroke.

7. This engine simply replaces the
conventional Four Stroke Engines
Cylinder Head. The manufacturers Four
Stroke bottom end remains unchanged
The net result is:
Power/torque increases of 35%.
Simpler and less expensive
manufacturing and tooling
Reduction of cylinder head reciprocating
parts
Lower maintenance costs due to less
wearing parts

8. 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:-
Reduction in fuel consumption by at
least 40%
Two expansions (work) in six strokes
Dramatic reduction in pollution
Liquefied Petroleum Gas
Costs comparable to those of a four-
stroke engine combustion engine in
design.

9. 1) Intake valve
2) Heating chamber valve
3) Combustion chamber valve
4) Exhaust valve
5) Cylinder
6) Combustion chamber
7) Air heating chamber
8) Wall of combustion chamber
9) Fuel injector
10) Heating plug
11) Piston
12) Crankshaft

10. The inlet valve(1) is kept
open. Due to cranking,
the piston moves
downward which results
in the formation of a
pressure difference due
to which pure air enters
the cylinder (5). The
crankshaft completes
rotates for half cycle.

11. The inlet valve
closes and the heating
chamber valve opens. The
piston moves upwards due
to cranking forcing the
pure air into heating
chamber. The air at this
stage is converted to high
pressure.

12. The combustion chamber valve opens and the gases of
combustion enter the cylinder.

13. The exhaust valve
opens. The piston moves
upwards and the exhaust
gases are removed via this
valve. The crankshaft rotates
another half cycle. At this
stage the crankshaft
completes 2 full cycles.

14. The heating chamber
valve opens and the pure air
now at high pressure and
high temperature enters the
cylinder as shown in the
figure which does work on
the piston and hence it
moves downwards resulting
in the 2nd power stroke. The
crankshaft completes
another half cycle.

15. Finally the
combustion chamber
valve opens the
piston moves
upwards forcing the
pure air into the
combustion chamber.
The crankshaft will
complete 3 full cycles
at the end of the 6th
stroke.

16. • Two expansions (work) in six strokes:
• Multifuel:
• Dramatic reduction in pollution:
• Liquefied Petroleum Gas:
• Cost comparable to those of a four-stroke engine:

17.  Drastically reducing fuel consumption and pollution without
radically affecting performances would allow the current
concept of the automobile to be reassessed.
 There is, at this day, no wonder solution for the replacement of
the internal combustion engine. Only improvements of the
current technology can help it progress within reasonable time
and financial limits.
 Fuel consumption for mid-sized engines should be within 4
and 5 litres per 100km. and 3 to 4 litres for the small-sized
engines.
 Automobiles equipped with the six-stroke engine could appear
in the market within 3 to 5 years.

18.  www.google.com
 www.scribd.com
 www.wikipedia.com