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Why would the engine want to recirculate exhaust gas back into the combustion stroke

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Answer:

In diesel engines

x emissions. Exhaust recirculated back into the cylinder can increase engine wear as carbon particulates blow by the piston rings and into the oil. ... This reduces the amount of power that can be extracted by the piston. EGR also tends to reduce the amount of fuel burned in the power stroke.

Step-by-step explanation:

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