METHOD OF OPTIMIZATION OF PROFILE OF SIDE SURFACE OF PISTON, POSITION OF PISTON RINGS AND MINIMAL CLEARANCE BETWEEN PISTON AND CYLINDER OF ENGINE IN COLD STATE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: device includes semiconductor meter 1 which output 2 is electrically coupled to cathode-ray unit 3 and to input 4 of mirror- galvanometer oscillograph 5. Cathode-ray unit 3 can be placed in electric circuit both in series and in parallel. Unit 6 registering temperature of head of piston of engine provided with marker of upper dead center communicates with temperature transducer of head of piston. Engine 7 is coupled to brake unit via rigid coupling 10. Meter operates by principle of frequency modulation. Change of capacitance of pickup 16 connected in circuit of generator of high-frequency oscillations causes proper deviation of generator frequency from rated value. EFFECT: improved operational reliability. 4 cl, 6 dwg