Cycle of a four-stroke internal-combustion engine.
{"Image DocumentName": "Cycle of a four-stroke internal-combustion engine.", "Image ImageDescription": "Exhaust stroke: Exhaust valve opens; piston moves up, expelling exhaust and leaving cylinder ready for next intake stroke.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}