Two and Four Stroke Engines - Fast and Simple Answers

Daniel Levy
 


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Many years ago when I got hooked by motorcycles, I started to hear a lot about two and four stroke engines. . . It seemed there were (and there still are) strong opinions in pro and con of each of the engine types.

As Internet wasn't available, and as I was worried about other aspects or motorcycle riding back then, I left that question unanswered for a long time.

If this is your case or if your are interested in these two kind of internal combustion engines, in the next few lines I hope to give you a few fast answers and some resources to get more in depth information.

Just keep reading. . .

Here are some facts about two and four stroke engines:

TWO STROKE ENGINES

Cycle - Two Strokes:

1. - Compression (intake+compression)

2. - Combustion (combustion+exhaust)

Take a look at the cycle in: http://science. howstuffworks.com/two-stroke2.htm

Advantages of two stroke engines:

  • The engine fires - spark plug ignites - once every revolution of the crankshaft.

  • They produce twice the power than four stroke engines.

  • They are much simpler than four stroke engines. Fewer parts to worry about.

    Disadvantages:

  • You have to mix two stroke engine oil with gas, and depending on your consumption, this might be expensive.

  • They last less. Lubrication is not as efficient as in a four stroke engine with heavy oil.

  • Do not use gas efficiently.

  • Pollute more.

    FOUR STROKE ENGINES

    Cycle - Four Strokes:

    1. - Intake

    2. - Compression

    3. - Combustion

    4. - Exhaust

    Take a look at the cycle in: http://science. howstuffworks.com/engine4.htm

    Advantages of four stroke engines:

  • Last longer than two stroke engines

  • More efficient use of gas

  • Pollute less than two stroke engines

    Disadvantages:

  • More complicated. Many more parts to worry about.

  • Half as powerful as two stroke engines (for equivalent engines)

  • Fires once every two revolutions.

    If you want to learn more about two stroke and four stroke engines, take a look at the pages I mention above. You will find extensive information and diagrams that will solve all of your doubts.

    Well I hope this gave you some basic information and helped you answer some FAQ about two and four stroke engines! :-)

    Enjoy the ride!

    Daniel Levy

    Daniel Levy is the owner and contributing writer of Japanese-Motorcycles-Only.com. He loves motorcycles and Web development. For more great info about Japanese Motorcycles visit his site or his blog at: http://japanese-motorcycles-only.blogspot.com/

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