six stroke engine

detailed presentation only in 30 slides.

1. SIX STROKE PETROL ENGINE THERMODYNAMICS LAB PRESENTATION

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 900-1000 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