File:Four stroke cycle compression.jpg

DescriptionFour stroke cycle compression.jpg English: Illustration of the Four-stroke cycle. Source Uploaded by Frack Author Created by Wapcaplet in Blender

once for every two cycles of the piston (it's a four-stroke engine, so you end up with one revolution per combustion/exhaust cycle). My understanding

iscommonly called, or on impulse. In other words oneworking stroke. In the four cycle engine we have four distinct move-ments or events to get one explosion.