As the valve timing is bound to the cycle of the piston, these are necessarily two-stroke engines.
Most small two-stroke petrol engines (i.e. small engine and motorcycle) are of this type, although many also have additional reed or disk valves.Large opposed-piston engines are also piston-ported.
This category has the following 2 subcategories, out of 2 total.
Media in category "Piston-ported engines"
The following 6 files are in this category, out of 6 total.