ROTOR-PISTON INTERNAL COMBUSTION ENGINE Russian patent published in 1994 - IPC

FIELD: engine engineering. SUBSTANCE: engine has case with trochoid- like working space wherein a rotor-piston provided with at least two tops is received. Sealing plates are set in the tops. Rigidity and resistance to wear of material of working surface are lower than ones of material of one of the plates and higher than ones of material of remainder plates or their working surfaces. In running-in the extremely hard plate forms micro-relief on working surface of the case and remainder plates hardness of which are lower than hardness of the case and are lapped to the micro-relief resulting in automatic maintaining of continuous contact line between the case and all plates over the whole length of the case even after long operation. EFFECT: enhanced reliability. 1 dwg