Unlike conventional diesels, the Commer Knocker engine used opposed pistons and a single crankshaft, giving it big torque, ...

2 stroke engines are widely used in motorcycles, scooters, boats, and even some small aircraft, yet many people don’t fully understand how they work or why they differ from 4 stroke engines ...

Two power strokes and two compression strokes per cycle. Generally, the biggest difference between a typical 4-stroke engine and the 6-stroke design is in the cam and valve timing.