While 4-stroke engines perform well and generally last longer than 2-stroke engines, 2-stroke engines are lighter and faster than 4-stroke engines. With the differences between 2-stroke and 4-stroke diesel engines, there is a lot to consider. At Prime Source Parts and Equipment, we can help you determine what will work best for your needs and provide you with exceptional service.
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As a technology leader in lubricants, Castrol formulates engine oils that can be used in 4 cycle engines and 2 cycle engines. But how are 2 and 4 cycle engines different? Essentially the numbers 2 and 4 refer to the number of piston strokes the engine takes to cover the complete fuel combustion and exhaust process.
A 4- cycle engine operates through 4 distinct strokes or cycles of the piston Below are the 4 stages of a 4 cycle engine:. To simplify things, typically motorcycles with two-stroke engines are no longer produced, as they do not comply with the environmental laws of many countries and are not allowed to be driven in cities, and the debate between the two kinds of engines is more applicable to off-road vehicles, such as dirt bikes.
A four-stroke engine, as the name suggests, has a piston that goes through four strokes or two crankshaft revolutions to complete one full cycle; the intake, compression, power and exhaust stroke. This means that when the piston moves down from the top of the cylinder to the bottom, it reduces the pressure inside the cylinder.
This reduced pressure draws a mixture of fuel and air into the cylinder through the intake port. Next, the piston goes back up, compressing the fuel and air mixture, after which a spark ignites the fuel and air.
Fuel for a 2-stroke engine has a small amount of oil mixed into it. No intake or exhaust valves are used and instead, small holes called scavenging ports in the cylinder wall are used for drawing in air and expelling exhaust.
Because combustion takes place with each revolution of the crankshaft with a 2-stroke, this format puts out more power than a 4-stroke engine and the power has more instantaneous delivery.
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