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 »

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 »

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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 »

As the piston in an engine moves down, a mixture of fuel and air gets drawn into the cylinder, which causes compression. This compression is ignited by the spark plugs, causing the exhaust valve to open to allow the burn... More »

All four-stroke engines use air, fuel, an engine and a spark to run. The engine uses four piston strokes to complete one operating cycle. The four separate strokes of the engine are the intake stroke, the compression str... More »

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Common modifications to increase the power of the Chevrolet 283 cubic-inch engine include increasing the engine's crankshaft stroke, porting and polishing its cylinder heads, and modifying the air intake and exhaust syst... More »

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The Pontiac 455 crate motor is an engine built from 1970 to 1976 with various features such as a big bore and stroke, giving it a 455.34-cubic-inch diameter resulting in a higher torque rating of 500 foot-pounds. The mod... More »

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