By what marks are internal combustion engines classified ?
Destination , Fuel type , Cylinder rotation , Compression chamber volume , Piston diameter , Number of pistons
Destination , Fuel generation , Fuel ignition , Number of cylinders , Number of cylinders , Cylinder layout , Fuel type , Cooling system used
Compression chamber volume , Piston movement , Number of pistons , Number of cylinders , Cylinder layout , Workflow , Working strokes and numbers of idle moves