24-11-2012, 05:52 PM
6 STROKE IC ENGINE
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. INTRODUCTION
History of the IC engine
: Nikolaus August Otto first designed what is known as the Otto engineor simply the 4 stroke internal combustion engine. Conversion of heat energyliberated by the combustion of the fuel into mechanical energy which rotated thecrankshaft was the basic principle of this engine. The 4 stroke engine worked on the principle of the Otto cycle .The 4 stroke engine comprises of the intake stroke,compression stroke, power stroke and finally the exhaust stroke. Fuel was injected inthe intake stroke and power from the fuel was derived in the 3
rd
stroke i.e. the power stroke which used the heat energy released by the combustion of the fuel. This 4stroke engine forms the basis of all modern vehicles used till date.1.2) Basic Working of the 4 stroke engine
[1]
:1)Intake stroke: The fuel enters the combustion chamber due to the pressuregradient formed in the chamber by the downward motion of the piston whichalso results in the half cycle rotation on the crankshaft. The work needed to push the piston is provided by cranking.
figure 1: Intake stroke
STROKE IC ENGINE
2.TYPES OF SIX STROKE ENGINES
2 .1) Crower six stroke engine. 2.2)
Beare Head Six Stroke engine.2 .3) Bajulaz six stroke engine.
Crower six stroke engine
:In six-stroke engine patented in the U.S. by Bruce Crower, 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 downfor an additional stroke.This design also claims to reduce fuel consumption by 40%.Crower's six stroke engine features:-
•
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.
STROKE IC ENGINE
CONCLUSION
Billions of explosion engines are running worldwide at this time, and this erais not about to end. It is commercially obvious that the big market is for automobile,heavy goods, construction-site and farm vehicles. This is a priority for the six-strokeengine.1)Drastically reducing fuel consumption and pollution withoutradically affecting performances would allow the current concept of the automobile to be reassessed.2)There is, at this day, no wonder solution for the replacement of theinternal combustion engine. Only improvements of the currenttechnology can help it progress within reasonable time and financiallimits.3) The six-stroke engine fits perfectly into this view. Its adoption bythe automobile industry would have a tremendous impact on theenvironment and world economy, assuming up to 40% reduction infuel consumption and 60% to 90% in polluting emissions, dependingon the type of fuel being used.4)Fuel consumption for mid-sized engines should be within 4 and 5litres per 100km. and 3 to 4 litres for the small-sized engines.5)Automobiles equipped with the six-stroke engine could appear in themarket within 3 to 5 years