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Whats the difference between engines running on diesel and gasoline?
Wiki User
∙ 13y ago
Gas engines use spark plugs to ignite the air fuel mixture and diesel engines use high cylinder compression to ignite the fuel air mixture. Other than that they are similar.
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Diesel engines ignite the fuel by using high compression: as the engine compresses the air inside the combustion chamber, it reaches around 1000 degrees, at which point diesel fuel is injected into the combustion chamber, and it ignites.
Gasoline engines use the sparks from spark plugs to ignite the gasoline/air mixture in the engines' combustion chambers after it has been compressed. Because separate sparks are used the amount of compression required in a gasoline engine is a lot less than would be necessary in a diesel engine.
The main reason diesel engines are heavier and more expensive to make than gasoline engines is because, to be able to withstand the much higher compression, diesel engines have to be made much stronger by having thicker cylinder walls, compression chambers, pistons, connecting rods, crankshafts, etc.
Wiki User
∙ 13y ago
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