The seminar presentation by Sushang Shah covers six-stroke engines, an advancement over traditional four-stroke engines, highlighting different types, including dual fuel variants. The six-stroke engine notably reduces emissions and fuel consumption while offering higher efficiency but comes with increased size and manufacturing costs. Applications include commercial vehicles, agricultural machinery, and potential uses in aviation and marine sectors.

1. Department of Mechanical Engineering
A Seminar Presentation On
Presented By
SUSHANG SHAH
ID : 105D1A03A4

2. ➢INTRODUCTION
➢TYPES OF SIX STROKE ENGINES
➢BAJULAZ SIX STROKE ENGINE
➢DUAL FUEL SIX STROKE ENGINE
➢PV DAIGRAMS
➢SPECIFICATIONS
➢COMPARISONS
➢IMPROVEMENTS IN EXHAUST
➢ADVANTAGES & DISADVANTAGES
➢APPLICATIONS
➢CONCLUSION

3. ➢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
engine
➢More efficient & reduce emissions.

4. 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.

5. 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
Charge pump
engine

6. 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. Spark plug / Fuel injector
10.Heater plug STROKE 1
➢Intake of pure air in the
cylinder.

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

8. STROKE 4 STROKE 5
➢Release of pure air
into cylinder.
➢Recompression of pure air
in the combustion chamber.

9. STROKE 6
➢Exhaust of combustion gases into the atmosphere.

10. ➢This engine runs by two fuels i.e. petrol / diesel (primary
fuel) and methanol (secondary fuel)

12. Four stoke Six stroke
Engine Engine
Engine type DI, Single cylinder, Air cooled, OHV
Bore x Stroke [mm] 82 x 78
Displacement [cc] 412
Top Clearance [mm] 0.9
Cavity Volume [cc] 16
Compression ratio 21
Intake Valve Open 100
BTDC 70
BTDC
Intake valve Close 1400
ABDC 1450
ABDC
Exhaust Valve Open 1350
BBDC 1400
BBDC
Exhaust Valve Close 120
ATDC 30
ATDC
Valve Overlap 220
100
Rated power 5.9 kW /3000rpm
Base Engine Test Engine

13. Comparison between four stroke & six stroke petrol/diesel engines
Engine Parameters
Four Stroke
Engine
Six Stroke
Engine
Engine Speed Ne [rpm] 2007 2016
Supplied combustion heat per cycle
Qt [KJ/cycle] 0.50 0.68
Supplied combustion heat per unit time Ht [KJ/s]
8.36 7.62
Intake air flow per cycle
Ma [mg/cycle] 358.7 371.4
Injection quantity per cycle
Mf [mg/cycle] 11.8 16
Excess air ratio λ 2.40 1.83
Intake air flow per unit time
Ma [g/cycle] 6.00 4.16
Injection quantity per unit time
Mf [g/sec] 0.197 0.179
Brake torque Tb [N-m] 15.52 15.28
Brake power Lb [KW] 3.26 3.24
BSFC. b [ g / KW-h] 217.9 520.3
IMEP Pi [Kgf / cm2] 5.94 4.37
Indicated torque Ti [N-m] 19.10 18.71
Indicated power Li [KW] 4.01 3.75
ISFC bi [g / KW-h ] 177.2 163.3

14. Four Stroke
Engine
Six Stroke
Engine
Dual Fuel Six
Stroke Engine
Nitrous Oxide [ppm]
( % improvement) 768
113
(85.3%)
90.5
(88.2%)
Soot [%]
(%improvement) 6.8
28.8
(- 323.5%)
0
(100%)
Indicated specific heat consumption
bi’ [MJ/KW-h]
(% improvement)
7.51 6.61
(12.0%)
6.37
(15.2%)

15. ➢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

16. ➢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.

17. ➢Commercial vehicles such as automobiles
➢Transportation of heavy goods.
➢construction-site and farm vehicles.
➢motor-pumps, generator sets, stationary engines, etc.,
intended for agriculture and industry.
➢Six stroke concept in airplanes an helicopters.
➢Marine applications.

18. ➢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.