detailed presentation only in 30 slides.

2. GROUP MEMBERS:
ABDULLAH KHALID
15-ME-075
MONEEB BUTT
15-ME-051
MUAZ ALI
15-ME-079
SAFIULLAH
15-ME-123

3. CONTENT:
• HISTORY
• INTRODUCTION
• WHAT IS SIX STROKE ENGINE?
• TYPES
• CLASSIFICATION
• WORKING PRINCIPLE
• DIFFERENT STROKES
• GRAPHS
• ADVANTAGES

4. HISTORY:
•IN 1883, ENGINEER SAMUEL GRIFFIN DEVELOP A "PATENT SLIDE VALVE" AND A SINGLE-
ACTING SIX-STROKE ENGINE USING IT.
•LEONARD DYER INVENTED A SIX-STROKE INTERNAL COMBUSTION WATER-INJECTION
ENGINE IN 1915. DYER'S SIX-STROKE ENGINE FEATURES:
NO COOLING SYSTEM REQUIRED
IMPROVES A TYPICAL ENGINE’S FUEL CONSUMPTION
REQUIRES A SUPPLY OF PURE WATER TO ACT AS THE MEDIUM FOR THE SECOND POWER
STROKE.
EXTRACTS THE ADDITIONAL POWER FROM THE EXPANSION OF STEAM.

5. •THE BAJULAZ SIX-STROKE ENGINE WAS INVENTED IN 1989 BY ROGER BAJULAZ . THE BAJULAZ
SIX-STROKE ENGINE FEATURES ARE:
REDUCTION IN FUEL CONSUMPTION BY AT LEAST 40%
TWO EXPANSION (WORK) STROKES IN SIX STROKES
MULTIFUEL, INCLUDING LIQUEFIED PETROLEUM GAS
DRAMATIC REDUCTION IN AIR POLLUTION
COSTS COMPARABLE TO THOSE OF A FOUR-STROKE ENGINE
•VELOZETA SIX-STROKE ENGINE IN 2005.
•NIYKADO SIX-STROKE ENGINE ON MAY 25, 2012.
•CROWER SIX-STROKE ENGINE, ETC.

6. INTRODUCTION:
•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.
•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”.
•THE SECOND APPROACH, “STEAM OR AIR IS USED AS THE WORKING FLUID FOR
THE ADDITIONAL POWER STROKE”.

7. WHAT IS SIX-STROKE ENGINE?
•MODIFIED FORM OF TWO AND FOUR STROKE ENGINES.
•INTERNAL COMBUSTION ENGINE.
•MORE POWER.
•HIGHER FUEL EFFICIENCY.
•REDUCE EMISSIONS.
•REDUCE AIR POLLUTION.

8. TYPES:
•BEARE HEAD ENGINES
•BRUCE CROWERS ENGINES
•VELOZETA’S ENGINES

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 ( BMW )
• 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. BRUCE CROWERS ENGINES:
THIS ENGINE IS INVENTED BY BRUCE CROWER OF CALIFORNIA IN USA IN THE YEAR 2004.
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%.
• 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.

12. BRUCE CROWERS ENGINES:

13. VELOZETA’S ENGINES:
• 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.
• 40% REDUCTION IN FUEL CONSUMPTION.
• DRAMATIC REDUCTION IN AIR POLLUTION.

14. OPPOSED PISTON ENGINE:
•THESE DESIGNS USE TWO PISTONS
PER CYLINDER OPERATING AT
DIFFERENT RATES, WITH
DETONATION OCCURRING BETWEEN
THE PISTONS.

15. BEARE HEAD ENGINES:
• POWER/TORQUE INCREASES OF 35%.
• FEWER, LIGHTER RECIPROCATING PARTS,
• SIMPLER AND LESS EXPENSIVE MANUFACTURING AND TOOLING
• REDUCTION OF CYLINDER HEAD RECIPROCATING PARTS
• LOWER MAINTENANCE COSTS DUE TO LESS WEARING PARTS

16. WORKING PRINCIPLES:
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

17. SUCTION STROKE:
THE PISTON MOVES FROM TOP DEAD CENTER TO
THE
BOTTOM DEAD CENTER AND CREATES VACUUM
PRESSURE .
SO THE AIR AND FUEL MIXTURE IS SUCKED IN TO
THE
CYLINDER.

18. COMPRESSION STROKE:
THE PISTON MOVES FROM
BOTTOM DEAD CENTER TO TOP
DEAD
CENTER AND COMPRESSES THE
MIXTURE. THE MIXTURE IS
COMPRESSED
TO HIGH TEMPERATURE AND
PRESSURE.

19. POWER STROKE:
AT THE END OF COMPRESSION
STROKE THE FUEL IS IGNITED AND
BURNT. THE PRESSURE INSIDE THE
CYLINDER INCREASES RAPIDLY AND
IT PUSHES THE PISTON DOWN AND
THE POWER IS TRANSMITTED FROM
PISTON TO WHEEL.

20. EXHAUST STROKE:
THE BURNT PRODUCT IS
PUSHED THROUGH THE
EXHAUST
VALVE BY THE UPWARD
MOVEMENT
OF THE PISTON.

21. 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 VAPOR
INCREASING VOLUME AROUND 1600
TIMES WHEN IT COMES IN CONTACT
WITH THE SUPERHEATED CYLINDER.

22. SECONDARY EXHAUST STROKE:
IN THIS STROKE THE
WATER VAPOR
IS EXHAUSTED BY THE
UPWARD
MOTION OF THE PISTON.

23. COMPARISON OF SIX STROKE ENGINE WITH
FOUR STROKE ENGINE:

24. •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.

25. 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
• LONGER SERVICE INTERVALS POSSIBLE DUE TO LOWER OPERATING TEMPERATURES RECORDED.
• LESS FRICTION – SO , LESS WEAR AND TEAR
• LOWER MAINTENANCE COSTS DUE TO LESS WEARING PARTS (BEARE CYLINDER HEAD)
• HIGHER OVERALL EFFICIENCY.
• POWER/TORQUE INCREASES OF 35%
• SIMPLER AND LESS EXPENSIVE MANUFACTURING AND TOOLING.

26. 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

27. APPLICATIONS:
•AUTOMOBILES, HEAVY GOODS,
CONSTRUCTION-SITE AND FARM
VEHICLES.
•MOTOR-PUMPS, GENERATOR SETS,
STATIONARY ENGINES, ETC....INTENDED
FOR AGRICULTURE AND INDUSTRY.
•MOTORBOATS

28. CONCLUSION:
•DRASTICALLY REDUCING FUEL CONSUMPTION (BY 40%) AND POLLUTION
(BY 60-90%) WITHOUT RADICALLY AFFECTING PERFORMANCES
•IT ENABLES LOWER ENGINE TEMPERATURE AND THEREFORE INCREASES IN
THE OVERALL EFFICIENCY.

29. REFERENCES:
•HTTPS://SCHOLAR.GOOGLE.COM.PK/
•WWW.SCRIBD.COM
•HTTPS://EN.WIKIPEDIA.ORG/WIKI/SIX-STROKE_ENGINE
•HTTP://WWW.SIXSTROKE.COM/SPECIFICATIONS.HTM
•WWW.SIXSTROKE.COM

30. THANK YOU