What Do You Mean by Four Stroke?

Written by Thomas Yoon


Continued from page 1

The fuel is supposed to burn so fast as to explode. So there is no point in injecting it more than it can burn. Ifrepparttar fuel is not able to catch fire, it will remain inrepparttar 102781 piston as unburnt fuel.

Sorepparttar 102782 timing ofrepparttar 102783 fuel injection will stop slightly afterrepparttar 102784 piston has reached top dead center.

The explosion insiderepparttar 102785 piston isrepparttar 102786 driving force forrepparttar 102787 engine. It will createrepparttar 102788 momentum to turnrepparttar 102789 engine forrepparttar 102790 next 2 cycles.

The next cycle isrepparttar 102791 exhaust stroke. In this stroke, allrepparttar 102792 products of combustion is driven off fromrepparttar 102793 piston top. The exhaust valve(s) will have opened to allowrepparttar 102794 combustion gases to escape. In an ideal engine, these include carbon dioxide gas, water vapor and excess air.

However, in actual practice,repparttar 102795 combustion may not be so perfect. Carbon particles, unburnt fuel particles, lubricating oil particles, sulphur dioxide, carbon monoxide, and ash may also be discharged. Asrepparttar 102796 piston will not be able to reachrepparttar 102797 the cylinder head perfectly, not allrepparttar 102798 exhaust gas can be driven off completely. A small quantity of these exhaust products will remain insiderepparttar 102799 cylinder even asrepparttar 102800 next cycle starts.

Oncerepparttar 102801 exhaust gases have been driven off,repparttar 102802 next stroke starts. This isrepparttar 102803 air intake stroke that we started off with. The cycles repeat itself asrepparttar 102804 engine runs continuously.

Obviouslyrepparttar 102805 morerepparttar 102806 exhaust gas can be driven off, andrepparttar 102807 more oxygen contentrepparttar 102808 cylinder can contain,repparttar 102809 more efficient repparttar 102810 combustion ofrepparttar 102811 fuel can be achieved.

This can be achieved by supercharging and coolingrepparttar 102812 air intake.

Well folks, that should boost up your power!

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Why Select Two Strokes?

Written by Thomas Yoon


Continued from page 1

The power developed in a 4-stroke engine is based onrepparttar formula, Power = PLAN/2, where,

P isrepparttar 102780 mean effective pressure insiderepparttar 102781 cylinder, L isrepparttar 102782 stroke length ofrepparttar 102783 piston travel, A isrepparttar 102784 cylinder bore orrepparttar 102785 area ofrepparttar 102786 piston top, N isrepparttar 102787 number of revolutions per unit time.

In a 2-stroke engine, becauserepparttar 102788 power is developed inrepparttar 102789 same revolution,repparttar 102790 formula for Power becomes, P = PLAN

This means that withrepparttar 102791 same mean effective pressure, stroke length and bore (area),repparttar 102792 2-stroke engine can develop twicerepparttar 102793 power of a 4-stroke engine!

If size, weight, and material cost are causes for concern,repparttar 102794 2-stroke engine hasrepparttar 102795 clear advantage.

Well folks, 2-strokes haverepparttar 102796 advantage of higher power with small size. However, there are some disadvantages too. That could be discussed later...

"PRODUCE YOUR BEST WITH THE BEST!" Hard-to-find tools become easy-to-find. Quality Tools

Many years of working experience in Marine, Facilities, Construction has given the author material for writing e-books and articles related to engineering, and management. Subscribe to facworld ezine More information at Marine and M & E


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