A four-stroke engine uses the four-stroke combustion cycle, which converts fuel, in most cases gasoline, into movement and energy. The four-stroke combustion cycle is made up of the intake stroke, the compression stroke,... More » Vehicles Car Parts & Maintenance Engine

Animated Engines contains a good animated visual representation and detailed description of the inner workings of a four-stroke engine, as well as others. NASA's website also contains a computer animated depiction of a p... More » Science Physics Motion & Mechanics

Four-stroke engines power gasoline and diesel oil vehicles. Two-stroke engines are found in equipment that requires a lower level of power, such as chain saws, model planes and dirt bikes. More » Vehicles Car Parts & Maintenance
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