06-03-2013, 03:22 PM
A PRESENTATION ON SIX STROKE ENGINE
SIX STROKE.ppt (Size: 3.08 MB / Downloads: 118)
INTRODUCTION
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.
Two approaches.
First approach engines:
Beare Head engine
Second approach engines:
Crower six-stroke engine.
Bajulaz engine.
Velozeta Six-stroke engine.
BEARE HEAD ENGINE
Malcolm Beare built an innovative hybrid design of the I C engine , by combining a two stroke with a four stroke engine.
The Beare Head is a new type of four stroke engine head design known as the “Beare Head”
The Beare Head uses a piston and ports very much like a two stroke engine to replace the over head valve system that is found in four stroke engines today. The four stroke block, pistons and crankshaft remain unaltered. This combination of two stroke and four stroke technology has given the engine its name – the “six stroke engine” (2 + 4 = 6).
WORKING PRINCIPLE
Fuel ignites with piston at the top dead center.
Rotary valve opens, allowing exhaust to escape
Exhaust stroke begins when the piston is at bottom dead center
Exhaust stroke ends, intake begins. rotary valve cuts exhaust .intake of charge into cylinder due to pressure difference.
The intake stroke happens when the piston is on its downward path with the intake valve open. This action creates suction, drawing atomized fuel in this case gasoline mixed with air, into the combustion chamber.
CONCLUSION
More efficient.
Increased torque .
Less noisy.
Less weight.
Reduced emission.