The document discusses a six-stroke engine, which adds two additional strokes to the traditional four-stroke internal combustion engine. The Crower six-stroke engine injects water into the combustion chamber on the fifth stroke, where it is turned to steam to power an additional downstroke. This provides a second power stroke and cools the engine. Potential advantages include 40% reduced fuel consumption and lower emissions. Limitations include risks of damage from injecting cold water and additional system complexities. Improvements could involve pre-heating water and reusing condensed water to address these issues.
2. CONTENTS
What is SIX STROKE ENGINE ???
CROWER Six Stroke Engine
Working
Advantages
Limitations & Obstacles
Embetterment
Conclusions
Queries
3. WHAT IS SIX STROKE ENGINE???
The SIX-STROKE Engine is a type of internal combustion
engine based on the four-stroke engine, but with additional
complexity intended to make it more efficient and reduce
emissions.
There are two power strokes: one with fuel, the other with
steam or air.
5. CROWER SIX STROKE ENGINE
The CROWER six-stroke engine is a claimed high-efficiency
variant of an internal combustion engine under development
by Bruce Crower.
Two extra strokes are added to the customary internal
combustion engine, 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.
6. WORKING
In a six-stroke engine, when the combustion chamber
temperature reaches approx. 400 °F (200 °C). Just before the
fifth stroke, fresh water is injected directly into the
hot combustion chamber through the engine's fuel injector
pump, which 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 Power stroke.
9. ADVANTAGES
There is 40% reduction in fuel consumption.
Extracts work from heat that is ordinarily lost through the
cooling system of a conventional engine.
Reduces exhaust emissions per a given power range.
Steam stroke cools the engine internally hence the use of much
higher compression ratios.
The weight and power loss of conventional cooling system
parts can be eliminated.
10. LIMITATIONS AND OBSTACLES
Injecting relatively cold water onto a hot metal piston can
damage it over time from thermal expansion and contraction.
Separate water tank would have significant weight and space
penalties
A steam-free cool down reduces the temperature inside the
combustion chamber.
Cold climate anti-freezing measures would be needed in the
water reservoir.
11. BETTERMENT
To prevent damages due to the action of cold water, we can
utilize the exhaust gases for pre- heating of water.
We can use a condenser instead of a separate water tank
which will reuse the distilled water for a period of cycles.
To compensate the temperature drop inside the chamber we
can further increase the Compression ratio which increases
the power output making it suitable for higher power
requirements.
12. CONCLUSIONS
The concept of Six Stroke Engine seems to be rather eco-
friendly and low fuel consuming which can fulfill the needs of
near future.
A lot of experiments are being conducted in order to improve
the efficiency and workability of the engine.
