Two and Four Stroke Engines: Fast and Simple Answers.
A few fast responses and facts about Two and Four Stroke Engines.
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:
- Compression (intake+compression)
- 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:
- Intake
- Compression
- Combustion
- 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
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