SIX STROKE ENGINE COMPLETE PPT. ENJOY..... FORCE TO READ............

1. A PROJECT
SEMINAR REPORT
ON.
SIX STROKE PETROL
ENGINE

2. Power Plugs: Templates
Department oF mechanicaL engG. g.I.e.t (polYTECHNIC)
jagatpur,cuttack.

3. CONTENTS:-
• Introduction
• How six stroke engine works
• Working principles
• Specification of six stroke engine
• Comparison of six stroke engine with
four stroke engine
• Graphs
• Gallery
• Thermodynamic advantages
• Conclusion

4. What is Six stroke Engine ?
• The six stroke engine which having the
same or more power with higher fuel
efficiency than the existing engine has
started before many years. As a result of
all these researches a new engine
concept is formed, which is a six stroke
engine. Lot of research works are
conducting on this topic now a days and
already six stroke engines were discovered .

5. History of Six Stroke Engine.
• The term six stroke engine describes two
different approaches in the internal
combustion engine, developed since the
1990s, to improve its efficiency and reduce
emissions, In the first approach, the
engine captures the waste heat from the
four stroke Otto cycle or Diesel cycle and
uses it to get an additional power and
exhaust stroke of the piston in the same
cylinder. Designs either use steam or air as
the working fluid for the additional power
stroke..

6. Resent developed
three six stroke
engines
 Beare head engines
 Bruce crowers
engines
 Velozeta’s engines
are undergoing
tremendous research
works

7. Key attributes of the Beare Head
are:-
 Increased power,
 Increased torque,
 Fewer, lighter reciprocating
parts,
 Simpler manufacture

8. Beare Head piston engine :-

9. Classification Of six stroke Engine:
Single piston designs
 Griffin six stroke engine
 Bajulaz six stroke engine
 Crower six stroke engine
 Velozeta six stroke engine
Opposed piston design
 Beare head
 M4+2
 Piston charger engine

10. single piston designs :-
These designs use a single
piston per cylinder, like a
conventional two- or four-stroke
engine. A
secondary, non-detonating
fluid is injected into the
chamber, and the leftover
heat from combustion
causes it to expand for a
second power stroke
followed by a second
exhaust stroke

11. The Bajulaz Six Stroke Engine
• The Bajulaz Six Stroke Engine was
invented in 1989 by the Bajulaz S A
company, based in Geneva, Switzerland,
The Bajulaz six-stroke engine is similar to a
regular combustion engine in design. There
are 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

12. Bajulaz Six Stroke Engine :

13. Crower six stroke engine:-
 This engine is invented by Bruce crower of
california in USA in the year 2004.
Bruce Crower is actually a race car
mechanic with his own workshop. 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.

14. Crower six stroke engine:-

15. Velozeta six-stroke 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

16. Velozeta six-stroke engine :-

17. Opposed piston Engine.
• These designs use two pistons per cylinder
operating at different rates, with detonation
occurring between the pistons.

18. PISTON CHARGER ENGINE :-
In this engine, a “piston charger”
replace the valve system, The
piston charger charges the main
cylinder & regulates the inlet &
outlet aperture leading to no loss of
air and fuel in the exhaust, in the
main cylinder, combustion takes
place every turn as in a two stroke
engine & lubrication as in a four
stroke engine, fuel injection takes
place in the piston charger,

19. SYMBOLS USED :-
TFC:- Total fuel consumption in Kg/Hr
SFC:- Specific fuel consumption in Kg/Kwhr
BP :- Brake power in Kw
TDC :- Top dead center
BDC :- Bottom dead center
IVO :- Inlet valve opening
IVC :- Inlet valve closing
EVO :- Exhaust valve opening
EVC :- Exhaust valve closing
N :- Engine speed at rpm

20. Engine parts are :-
 Cylinder Head
 Cam shaft
 Inlet valve
 Sprocket 42T
 Rocker Arm
 Inlet Rocker arm
 Exhaust Rocker arm
 Head Cover
 Cam Lob
 Exhaust valve
 Air filter
 42T sprocket holder
 Exhaust Manifold
 Spark plug
 Cylinder
 Piston
 Connecting rod
 Timing Chain
 Sprocket 14T
 Crank
 Secondary air
induction unit
 Reed valve

22. Connecting Rod & Cylinder:-
• Connecting Rod:
In a reciprocating piston engime, the connecting
rod or conrod connects the piston to the crank or crank
shaft . Together with the crank, they form a simple
mechanism that converts reciprocating motion into
rotating motion.
• Cylinder:
A cylinder is the central working part of a reciprocating
engine or pump, the space in which
a piston travels. Multiple cylinders are commonly
arranged side by side in a bank, or engine blocks, which
is typically cast from aluminum, or cast iron before
receiving precision machine work.

23. ENGINE MODIFICATION :-
To make six-stroke engine from
conventional four-stroke engine, a few
modifications must be done to specific parts on
the conventional engine to be sure that the new
engine with six-stroke will run successfully. A
Mitsubishi single cylinder spark ignition
engine was used to apply these modifications
on it. These modifications are:
Crankshaft to Camshaft Ratio Modification

24. 1. Camshaft /crankshaft sprockets :-
• Crank has 1080 degrees of rotation for
360 degrees rotation of camshaft
• Hence their corresponding spockets are
having teeth ratio 3:1
• 34 teeth spocket of camshaft in the four
stroke is replaced by 42 teeth spocket
• 17 teeth crankshaft spocket is replaced
by 14 teeth spocket

25. 2. Cam lobes:-
• 360 degrees of cam as devided into 60
degrees among six strokes
• Inlet valve is opened in the first stroke
only & the exhaust valve, in the fourth,
fifth & sixth strokes by the exhaust valve
cam,
• The exhaust valve cam is double lobed,

27. WORKING PRINCIPLE :-
A six stroke engine describes a number of
different approaches in the internal combustion
engine to capture the waste heat from the four
stroke Otto cycle and use it to power an additional
power and exhaust stroke of the piston. Designs
either use steam or air as the working fluid for the
additional power stroke. As well as extracting
power, the additional stroke cools the engine and
removes the need for a cooling system making
the engine lighter and giving 40% increased
efficiency over the Otto Cycle.

29. First stroke :-
During the first
stroke the inlet
valve opens and
air-fuel mixture from
carburetor is
sucked into the
cylinder through the
inlet manifold .

30. Second stroke :-
During the second
stroke, piston moves
from BDC to TDC,
both the inlet valve
and exhaust valve are
closed and the air-fuel
mixture is
compressed.

31. Third stroke :-
During the third
stroke, power is
obtained from the
engine by igniting
the Compressed
air- fuel mixture
using a spark plug.
Both valves remain
closed. Piston
moves from TDC to
BDC.

32. Fourth stroke :-
During the fourth
stroke, the exhaust
valve and the reed
valve opens to
remove the burned
gases from the
engine cylinder.
Piston moves from
BDC to TDC.

33. Fifth stroke: -
During the fifth stroke,
the exhaust valve
remains open and the
reed valve closes.
Fresh air from the air
filter enters the
cylinder through the
secondary air
induction line
provided at the exhaust
manifold . The reed
valve opens.

34. Sixth stroke:-
During the sixth stroke,
the exhaust valve
remains open. The air
sucked into the
cylinder during the fifth
stroke is removed to the
atmosphere through the
exhaust manifold
. The reed valve opens
and the reed valve closes.

35. TESTING THE ENGINE :- :-
After applying these modifications on the
engine, a test was carried out to be sure
that the engine can run smoothly with six
stroke instead of four stroke cycles. The
same starter coupled with the engine was
used to start the engine. After two or three
attempts the engine was running smoothly
with six stroke cycles.

36. Comparison Of Six Stroke Engine
With Four Stroke Engine

38.  In a six stroke engine the energy
absorption is less because of slower
acceleration of reciprocating parts.
 It reduces the weight and complexity of
the engines head by as much as 50%.
Instead of using energy to drive the head.
 Torque is increased by 35% and
efficiency increased by the same.
 Increased torque and power output.

42. ADVANTAGES :-`
 Reduction in fuel consumption
 Dramatic reduction in pollution normally up to 65%
Lower engine temperature so easy to maintain the
optimum engine temp. level for better performance
 Less friction – so , less wear and tear
 The six-stroke engine does not require any basic
modification to the existing engines.
 Higher overall efficiency

43. Conclusion
 In a six stroke engine the energy absorption is
less because of slower acceleration of
reciprocating parts The piston speed of the
upper piston is about a quarter of the main
piston; therefore its service life should be at
least twice that of the main piston.
 In the Beare design, per single cylinder, the
number of parts is 15 compared to a four
stroke of approx 40 to 50 parts. Also, to
reduce manufacturing costs the head and
block can be machined in one piece.

44. ANY QUESTION ?

45. THANK YOU.