1. A Presentation on:
6 Stroke Engine
By :Sahil Kumar
Roll No:RC4902A14

2. Table of content About 6 Stroke Engine Working Positive Aspects
Obstacles
Application

3. About 6 Stroke Engine
The six-stroke engine is a high-efficiency variant of an internal combustion engine under development by Bruce Crower.

4. About 6 Stroke Engine
Two extra strokes are added to the customary internal combustion engine four stroke Otto cycle, which makes a six stroke engine.
A third down-stroke is a "steam stroke" and a third up-stroke exhausts the expanded steam while venting heat from the engine.

5. Working
The engine cold starts on the Otto cycle, coasting through the fifth and sixth strokes for a short period.
After the combustion chamber temperature reaches approximately 400 degrees Fahrenheit (200 °C), a mechanical operation phases in the fifth and sixth strokes.
Just before the fifth stroke, water is injected directly into the hot combustion chamber via the engine's fuel injector pump, creating steam and another power stroke.

6. Working
The phase change from liquid to steam removes the excess heat of the combustion stroke forcing the piston down (a second power stroke).
As a substantial portion of engine heat now leaves the cylinder in the form of steam, no cooling system radiator is required.

7. Positive Aspects
40% reduction in fuel consumption and reduced exhaust emissions per a given power range.
Ability to extract work from heat that is ordinarily lost through the cooling system of a conventional engine.
Long-running time scenarios without environmentally harmful anti-knock chemicals.

8. Positive Aspects
The weight and power loss of most conventional cooling system parts, such as the fan, radiator, and coolant pump, can be eliminated.
Physical engine size reduction (per a designated power rating) is possible as one third of the engine strokes produce power (in the Crower six-stroke), instead of one quarter (in the Otto cycle).

9. Obstacles
A warm-up period would be needed in all automotive applications.
Power and efficiency is reduced during the warm-up period due to the coasting 5th and 6th stroke.
Injecting relatively cold water onto a hot metal piston can damage it over time from thermal expansion and contraction.

10. Applications
A Crower cycle engine may prove to be useful as a passenger vehicle power plant.
The design may prove useful in heavy engine applications such as transport diesel trucks, heavy equipment (bulldozers, etc.), buses, and stationary power generators.
it would be very useful when coupled with a diesel cycle, which performs well in low-rpm long-stroke applications.

11. Thank You