it has the detail of the six stroke engine. its idea,how it can be achieved and different approach for six stroke engine

2. The six-stroke engine is a type
of internal combustion engine based on
the four-stroke engine.
First developed in early 1990’s
Advancement is the Duel fuel six stroke
diesel engine
More efficient & reduce emissions.

3.  Approaches for six stroke engine design
First approach
There is two additional strokes by the main
piston as fifth and sixth stroke
Second approach
It uses a second opposed piston which moves
at half the cyclical rate of the main piston

4. SIX
STROKE
ENGINE
FIRST
APPROACH
Griffin six
stroke engine
Bajulaz six
stroke engine
Crower six
stroke engine
Velozeta six
stroke engine
SECOND
APPROACH
Beare head six
stroke engine
Piston charger
engine

6. In a six-stroke engine prototyped in the United States by
Bruce Crower, water is injected into the cylinder after the
exhaust stroke and is instantly turned to steam, which expands
and forces the piston down for an additional power stroke.
Thus, waste heat that requires an air or water cooling system
to discharge in most engines is captured and put to use driving
the piston.
Crower estimated that his design would reduce fuel
consumption by 40% by generating the same power output at a
lower RPM. The weight associated with a cooling system could
be eliminated

7.  but that would be balanced by a need for a water tank in
addition to the normal fuel tank.

8. In a Velozeta engine, 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 40% reduction in fuel consumption and
dramatic reduction in air pollution.Its specific power 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

10. The Bajulaz six-stroke engine is similar to a regular
combustion engine in design.
There are, however, modifications to the cylinder head,
with two supplementary fixed capacity chambers:
a combustion chamber and an air preheating chamber
above each cylinder.
The combustion chamber receives a charge of heated
air from the cylinder; the injection of fuel begins
an isochoric (constant-volume) burn which increases
the thermal efficiency compared to a burn in the cylinder.

11. The high pressure achieved is then released into the
cylinder to work the power or expansion stroke.
 Meanwhile a second chamber which blankets the
combustion chamber, has its air content heated to a high
degree by heat passing through the cylinder wall.
This heated and pressurized air is then used to power an
additional stroke of the piston.
The claimed advantages of the engine include reduction in
fuel consumption by at least 40%, two expansion strokes in
six strokes, multi-fuel usage capability, and a dramatic
reduction in pollution.

12. 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.Heater plug
STROKE 1Intake of pure air in the
cylinder

13. STROKE 2 STROKE 3
Compression of pure air in
heating chamber
Release of combustion
gases in the cylinder

14. STROKE 4 STROKE 5
Release of pure air
into cylinder
Recompression of pure air
in the combustion chamber

15. STROKE 6
Exhaust of combustion gases

17. This design was developed by Malcolm Beare
of Australia.
 The technology combines a four stroke engine
bottom end with an opposed piston in the cylinder
head working at half the cyclical rate of the bottom
piston.
 Functionally, the second piston replaces the
valve mechanism of a conventional engine.
Claimed benefits include a 9% increase in
power, and improved thermodynamic efficiency
through an increased compression ratio and
expansion ratio similar to the miller or atkins cycle

18. In this engine, similar in design to the Beare head, a "piston charger" replaces the
valve system.
The piston charger charges the main cylinder and simultaneously regulates the
inlet and the outlet aperture leading to no loss of air and fuel in the exhaust.[12] In the
main cylinder, combustion takes place every turn as in a two-stroke engine and
lubrication as in a four-stroke.
Fuel injection can take place in the piston charger, in the gas transfer channel or in
the combustion chamber. It is also possible to charge two working cylinders with one
piston charger.
 The combination of compact design for the combustion chamber together with no
loss of air and fuel is claimed to give the engine more torque, more power and better
fuel consumption. The benefit of fewer moving parts and design is claimed to lead to
lower manufacturing costs.

19. Good for hybrid technology and stationary engines.
The engine is claimed to be suited to alternative fuels since there is
no corrosion or deposits left on valves.
The six strokes are
Aspiration
Pre-compression
Gas transfer
Compression
Ignition and
Ejection.

20. Reduction in fuel consumption by at least 40%
Two expansions(work/Power stroke) in six strokes
Dramatic reduction in pollution ( up to 65%)
Higher overall efficiency
Lower engine temperature & noise level
Due to more air intake, the cooling system is improved
Better scavenging and more extraction of work per cycle
Less inertia due to lightness of moving parts

21. Brake power & indicated power per cycle per
cylinder is comparatively lesser
Engine size increases due to many number of
cylinders & additional components
Higher manufacturing cost of six stroke engine

22. Automobiles, heavy goods, construction-site
and farm vehicles.
motor-pumps, generator sets, stationary
engines, etc....intended for agriculture and
industry
Motorboats