The six-stroke engine is an internal combustion engine that builds upon the four-stroke engine design to increase efficiency. It has two approaches - the first uses the same piston for two additional strokes, while the second uses a second opposed piston moving at half the rate of the main piston. The six-stroke engine injects water into the combustion chamber on the power stroke, turning it instantly into steam for an additional power stroke. This provides increased efficiency over traditional engines by extracting work from heat otherwise lost and reducing emissions and fuel consumption by up to 40%. However, challenges include potential piston damage from thermal expansion and ensuring an adequate water supply.

1. SIX STROKE ENGINE
Presented by – Akhil Das

2. What is a SIX-STROKE engine???
• The SIX-STROKE engine is a type of an internal
combustion engine based on four stroke
engine,but with additional features intended to
make it more efficient by reducing emissions
• There are two power strokes ,one with fuel and
the other with steam or air

3. Prototype of a SIX-STROKE engine

4. Cylinder : Bottom view
Cylinder : Top view

5. The Different approaches used in SIX-STROKE
engines
FIRST APPROACH
Two additional strokes using the same main piston
SECOND APPROACH
It uses a second opposed piston which moves at half the
cyclical rate of the main piston

6. Types of SIX-STROKE engines
First category ( According to the first approach)
1.
2.
3.
4.
Griffin six-stroke Engine
Bajulaz six-stroke Engine
Crower six-stroke Engine
Velozeta six-stroke Engine
Second category (According to the second approach)
1. Beare Head six-stroke Engine
2. Charge pump Engine

7. Working
• In a SIX-Stroke Engine when the temperature
reaches approximately 400 F, just before the fifth
Stroke fresh water is injected directly into the hot
combustion chamber through the engines fuel
injector pump.
• This injected water is quickly turned into super
heated steam, this causes the water to expand to
1600 times of it’s volume and so it forces the
piston downwards and creates an additional
power stroke.

8. Working of a SIX-STROKE engine

10. ADVANTAGES
• Simpler and less expensive manufacturing and
tooling
• There’s almost 40% reduction in fuel consumption
• Extracts work from heat that is ordinarily lost
through the cooling system of a conventional
engine
• Reduces Exhaust emissions
• Steam strokes cools the engine internally hence
much higher compression ratios can be achieved

11. Limitations and obstacles
•Injecting relatively cold water onto a hot
metal piston can damage it over time,
from thermal expansions and
contractions
•A separate water tank with sufficient
water should be installed
•Anti-freezing measures should be done in
the water reservoir

12. Conclusion
• It’s been time for us to think of something beyond the conventional
engines that pollute Nature. The six-stroke engine fits perfectly into
this view. It’s adoption by the automobile industry would have a
tremendous impact on the environment and world economy,
assuming up to 40% reduction in fuel consumption and 60% to 90%
in polluting emissions, depending on the type of the fuel being
used.

13. THANK YOU