The two-stroke hot gas motor has a double outer piston (2) with an axial movement in the cylinder body (1). A double inner piston (3) moves axially within the outer piston. The cylinder has two outer limit walls, and a center dividing wall to give two equa...

An expansion piston (EP) (2) and a compression piston (CP) (4) fit along a common center axis (6) and operate when aligned in series. First gas chambers (GK1) in a compression cylinder component (5) on the underside (15) of the CP and in an expansion cylin...