PISTON AUTOMATICALLY ADJUSTING DEGREE OF COMPRESSION OF INTERNAL COMBUSTION ENGINE Russian patent published in 1994 - IPC

FIELD: internal combustion engines with adjustable degree of compression. SUBSTANCE: mounted between movable head 3 and body 2 of piston 1 are: flexible member (compression spring) 4 and thermosensitive element 5 which is made in form of cylinders provided with housing 6 and supporting journal 7 and filled with active mass 8 possessing high coefficient of temperature expansion (mixture of ceresin wax and copper powder). Degree of compression of engine is set automatically depending on temperature of piston. EFFECT: enhanced efficiency. 3 cl, 5 dwg