Six stroke engine by Arpit Verma

1. SEMINAR
SIX
STROKE
ENGINE
Represented by: Arpit verma
Branch: Mechanical (7th sem)
Roll no.: 50 (1116-YCET-13)

2. CONTENTS
What is SIX STROKE ENGINE ??
CROWER six stroke engine
Working Principles
Thermodynamic analysis & comparison with 4-stroke engine
Advantages
Limitations & obstacles
Betterment
Conclusions

3. WHAT IS SIX STROKE ENGINE ??
 The SIX STROKE engine is a type of internal combustion
engine based on the four stroke engine, but with additional
complexity intended to make it more efficient & reduce
emissions.
 There are two power strokes: one with fuel, the other with
steam or water.

4. ACTUAL PROTOTYPE OF SIX STROKE
ENGINE

5. CROWER SIX STROKE ENGINE
 The CROWER six-stroke engine is claimed high-efficiency
variant of an internal combustion engine (I.C engine) under
development by Bruce Crower.
 Two extra strokes are added to the customary internal combustion
engine, which makes a six stroke engine. A third down-stroke
engine is a “steam stroke” & a third up-stroke exhausts the
expanded steam while venting heat from the engine.

6. WORKING
PRINCIPES

7. The working principle of six stroke
engine is based on the concept of four stroke engine but
with some modification, another two strokes are added.
SUNCTION STROKE
The piston moves from top dead centre to
Bottom dead centre & creates vacuum
pressure. So the air & fuel mixture is
sucked into the cylinder.

8. COMPRESSION STROKE
The piston moves from bottom dead centre to
top dead centre & compresses the mixture.
The mixture is compressed to high
temperature & pressure.
POWER STROKE
At the end of compression stroke the fuel is
injected & burnt. The pressure inside the
cylinder increases rapidly & it pushes the
piston down & power is transmitted from
piston to wheel.

9. EXHAUST STROKE:
The Burnt product is pushed
through the exhaust valve by the
upward movement of the piston.
SECONDARY POWER STROKE:
At the end of the exhaust stroke the
cylinder temperature becomes around
900-10000 C. At this stage water is injected
by an Injector in the form of fine droplets.
The water turns in to vapour increasing
volume around 1600 times when it comes
in contact with the superheated cylinder.

10. The water turns into vapour
increasing volume around
1600 times when it comes in
contact with the superheated
cylinder.
SECONDARY EXHAUST STROKE:
In this stroke the water vapour
is exhausted by the upward
motion of the piston.

11. THERMODYNAMIC
ANALYSIS &
COMPARISION WITH 4-
STROKE ENGINE

12. In order to determine the engine parameters, in 2011 HONDA
motors conducted the first simulation of the six stroke engine by
using a modified Honda GC190 engine.
SIMULATION RESULTS
POWER AND TORQUE V/S ENGINE SPEED

13. FUEL FLOW RATE:
The amount of fuel flow to the engine per unit time is known as
fuel flow rate.
As the diagram shows the fuel flow rate of 6-stroke engine is
50% lesser than the conventional 4-stroke engine.

14. ADVANTAGES
 There is 40% reduction in fuel consumption.
 Extracts work from heat that is ordinarily lost through the cooling
system of a conventional engine.
 Reduces exhaust emissions per a given power range.
 Steam stroke cools the engine internally hence the use of much
higher compression ratios.
 The weight & power loss of conventional cooling system parts
can be eliminated.

15. LIMITATIONS & OBSTACLES
 Injecting relatively cold water onto a hot metal piston can
damage it over time from thermal expansion & contraction.
 Separate water tank would have significant weight & space
penalties.
 A steam-free cool down reduces the temperature inside the
combustion chamber.
 Cold climate anti-freezing measures would be needed in the
water reservoir.

16. BETTERMENT
 To prevent the damages due to the action of cold water, we can
utilize the exhaust gases for pre-heating of water.
 We can use a condenser instead of a separate water tank which
will reuse the distilled water for a period of cycles.
 To compensate the temperature drop inside the chamber we can
further increase the compression ratio which increases the
power output making it suitable for high power requirements.

17. CONCLUSIONS
 The concept of Six-Stroke Engine seems to be rather eco-
friendly & low fuel consuming which can fulfil the needs of
near future.
 A lot of experiments are being conducted in order to improve
the efficiency & workability of the engine.

18. REFERENCES :
15th International Conference on Applied Mechanics and
Mechanical Engineering, 29-31 May, 2012,report by M. M.
Gasim, L. G. Chui and K. A. Bin Anwar
Project report on Six stroke engine, Calvin College, ENGR 340
Thermodynamic analysis testing and validation of six stroke
engine Report,
University of Northern Ireland.
Conklina J. C. and Szybist J. P., "A Highly Efficient Six-Stroke
Internal Combustion Engine Cycle with Water Injection for In-
Cylinder Exhaust Heat Recovery", Energy, Volume 35, Issue 4,
pp. 1658-1664 (2010).
Andrew De Jong, team 6 stroke, https://knightvision.calvin.edu
(accessed14/2/2012).

19. HAVE A NICE DAY………………