2. Contents
Introduction
Concept of six stroke I.C engine
Types of six stroke engine
Take as example
Bajulez six stroke engine
Strokes involved
Duel fuel using technique
Bear head six stroke engine
Comparison of six stroke to four stroke
Application of six stroke engine
Advantages
Disadvantages
conclusion
3. Introduction
Internal combustion engine based on the four-stroke
engine.
First developed in two approach
Advancement is the Duel fuel six stroke diesel engine
More efficient & reduce emissions.
4. Concept of six stroke
Combination of “two stroke and four stroke
technology ”has given the engine its name – the
“six stroke engine” (2 + 4 = 6).
5. 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
6. Types of six stroke engine
SIX STROKE
ENGNE
FIRST
APPROACH
Griffin six stroke engine
Bajulaz six stroke engine
Velozeta six stroke engine
Crower six stroke engine
SECOND
APPROACH
Charge pump engine
Beare head engine
16. DUAL FUEL SIX STROKE ENGINE
This engine runs by two fuels i.e. diesel (primary fuel) and
methanol (secondary fuel)
17. Beare Head six stroke I.C engine
An over view of the
Beare head engine
18. Strokes involved in engine
The intake stroke happens.
This action creates suction.
Atomized fuel in this case
gasoline mixed with air, into
the combustion chamber.
19. Strokes involved in engine
Top piston nearly
closes complete inlet
port and The
compression begins.
20. Strokes involved in engine
Combustion
chamber completely
sealed and ready for
the combustion.
21. Strokes involved in engine
Fuel ignites with
piston at the top dead
center.
23. Strokes involved in engine
Exhaust
stroke begins
when the piston
is at bottom
dead center
24. Strokes involved in engine
Exhaust stroke
ends, intake begins.
rotary valve cuts
exhaust .intake of
charge into cylinder
due to pressure
difference.
25. COMPARISONS
Six Stroke Diesel
Engine
Methanol Six Stroke
Engine
Engine Speed Ne [rpm] 2016 2006
Supplied combustion heat per cycle
Qt [kJ/cycle] 0.68
Injection quantity per cycle
(First Combustion Stroke)Mf1 [mg/cycle]
8.0
(Diesel Fuel)
Injection quantity per cycle
(Second Combustion Stroke)f2 [mg/cycle]
8.0
(Diesel Fuel)
17.2
(Methanol)
Excess air ratio λ 1.86 1.93
Brake torque Tb [N-m] 6.18 6.08
Brake power Lb [kW] 1.52 1.5
B.S.F.C. b [ g / kW.h] 504.0 777.7
I.M.E.P. Pi [kgf / cm2] 4.56 4.75
Indicated torque Ti [N-m] 21.68 20.38
Indicated power Li [kW] 3.45 2.98
I.S.F.C. bi [g / kW.h ] 155.5 236.2
Indicated specific heat consumption
bi’ [MJ /kW.h] 6.61 6.37
Comparison between Duel fuel six stroke engines
28. Advantages
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
29. Applications
Automobiles, heavy goods, construction-site and
farm vehicles.
motor-pumps, generator sets, stationary engines,
etc....intended for agriculture and industry.
Motorboats
30. Disadvantages
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
31. Conclusion
Drastically reducing fuel consumption (by 40%)
and pollution (by 60-90%) without radically affecting
performances.
For the dual fuel six-stroke engine, soot & nitrous
oxide was practically eliminated by a small amount of
methanol in the second combustion process.
It enables lower engine temperature and therefore
increases in the overall efficiency.
32. REFERENCES
BAJULAZ.S,(2007)’ SIX STROKE ENGINE
ACCESSED-BPS PUBLICATION,VOL 12
LYONS.P(2006),’INSIDE BRUCE
CROWERS SIX STROKE ENGINE”-TATA
MCGRAW HILL ,FIFTH EDITION
www.themegallery.com
