1. Actually, it's a gas-powered four-stroke engine.

2. The invention concerns a four stroke engine with a unique valve on the cylinder, for which the admission flux respectively the evacuation flux separation is made by butterfly valves.

3. In a two-stroke engine, the Camshaft rotates at the same speed as the crankshaft, while in a four-stroke engine, the Camshaft spins at half the speed of the crankshaft since the Camshaft gear has

4. The working range of the fuel screw on a four-stroke engine is one to three half-turns out, while the Airscrew on a two-stroke engine has a working range of one-and-a-quarter to two half-turns out.