A study of the operation of two stroke, four stroke Essay Example
A study of the operation of two stroke, four stroke Essay Example

A study of the operation of two stroke, four stroke Essay Example

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  • Pages: 3 (557 words)
  • Published: September 18, 2017
  • Type: Case Study
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The primary purpose of the cooling system is to prevent the engine from overheating by dispersing excess heat into the surrounding environment. Additionally, it aids in rapidly heating up the engine and maintaining a steady temperature. Most automobiles come with a cooling system that includes a radiator and water pump. The water moves around the cylinders before passing through the radiator for cooling. However, some vintage cars use an air-cooling system which makes their engines lighter but hotter, possibly leading to reduced engine longevity and overall performance.

A piston inside an engine can be explained as a cylindrical metal part that oscillates vertically within the cylinder.

The task of the connecting rod is to link the piston to the crankshaft. Its capability to swivel at both ends allows its angle to adjust as it alternates between forward and backward movements while concurrently rotating crankshaft occurs.



Similar to the operation of a jack-in-the-box, the purpose of the crankshaft is to transform vertical motion from the piston into a rotating action.

Camshaft and Valve System

The intake and exhaust valves operate at the correct timing to allow the entry of air and fuel and the expulsion of exhaust. When compression and combustion occur, both valves remain closed to ensure a sealed combustion chamber.

Functioning of the Engine

A type of internal combustion engine called a diesel engine turns fuel-sourced chemical energy into heat energy within its cylinder. This transformation process is carried out by self-ignition followed by fuel burning in the cylinder after air charge has been compressed inside it.

There are two classifications of diesel engines: two-stroke and four-stroke.

The operation of a two-stroke engine entails the piston being propelled from the cylinder's top du

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to an expanding air-fuel mixture. The piston compresses while moving and is ignited via a spark plug. Exhaust is discharged through another opening in the cylinder. Unlike four-stroke engines that have mobile valves, every time a two-stroke engine's piston reaches its cycle peak, the spark plug ignites. As such, these engines undergo twice as many combustion cycles per rotation compared to others, granting them a higher power-to-size ratio. Notwithstanding, they have high fuel consumption rates and are significant contributors of oil pollution.

Contrarily, a four-stroke engine involves four phases: intake (induction), compression, ignition (combustion), and discharge of exhaust gases (exhaust). These stages transpire over two rotations for each operational cycle in any diesel-powered four-stroke engine.

In an engine, valves are typically governed by a camshaft. This camshaft is equipped with numerous cams along its length that trigger the opening of the valves at appropriate times during intake or exhaust strokes. The rotation speed of the camshaft is half that of the crankshaft. A tappet is located between the valve and cam, offering a surface for the cam to glide on and open up the valve. Different engines have varying placement and quantity of camshafts. Numerous engines employ overhead cams or even dual overhead cams as depicted in the illustration; here, through a flat tappet, cams directly regulate valves. This structure enables greater engine speeds since it establishes a shorter and direct route between the cam and valve which isn't easily extended. In some other engine designs, instead in the crankcase you'll find where they place theircamshafts with its movement relayed via push rod, rocker arms, and valve stems.

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