Suction engine

a suction engine is a combustion engine, with which air enriched with fuel is not compressed additionally by a compressor, for example turbochargers. Most combustion engines of motor vehicles are suction engines.

The movement of the pistons in the cylinders produces a negative pressure, by which air is sucked in.

With four-stroke engines one of the four clock rates is the sucking in act. Air is sucked through the movement of the piston to the crankshaft over the cylinder head into the cylinder.

With two-stroke engines air is sucked first in the crank case, while the piston away from the crankshaft moves. Only if the piston induces itself again to the crankshaft, it presses air by overcurrent channels into the cylinder.

 

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