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What is displacement mean?

Updated: 8/16/2019
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11y ago

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In science it is sort of a synonym for volume. The water displacement method is for finding volume of an irregular shaped object by placing it in water and observing the amount of water 'displaced' ... pushed out of its way.

For an internal combustion engine its displacement is the amount of air-fuel mixture which all the pistons can move out of all the cylinders through one complete set of cycles. It can be measured by filling one cylinder with any liquid (usually oil to keep from damaging the engine) when that piston is completely at the bottom of its motion then catching the oil pushed out as the piston moves to the top of its motion. Then assume all piston/cylinder combinations are equal, multiply that amount by the number of cylinders. You can also multiply to find the displacement using the equation for the volume of a cylinder, but this would be slightly less accurate due to tolerences in the building of the engine.

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11y ago
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