Inline dual piston engine

The drive has sleeve piston (3) and suction piston that are connected through a connecting rod having a crankshaft (9). The periphery (8) of the sleeve piston is provided with groove that extends in axial direction of piston guide for axial restraint. A toothed ring (4) of crankshaft is provided in cylinder wall (1) of combustion chamber. A toothed ring cam roller (7) is provided at periphery of the sleeve piston. A pinion (5) is coupled with the crankshaft.