INTERNAL COMBUSTION ENGINE TIMING CONTROL DEVICE Russian patent published in 1998 - IPC

FIELD: manufacture of engines. SUBSTANCE: timing gear is made in form of four working pistons with cut lateral planes provided with profiled slots where pins are located; profiles of slots ensure successive motion of pistons in pairs. Body of timing gear is made in form of disk with cylindrical piston blocks; on either side it is partially cut by lateral planes forming through radial slots in body of disk which are closed with flat plates in outer portion of disk. Timing gear is provided with spool valve which is spring-loaded on either side; end cavities of spool valve are connected in parallel with inner and outer cavities of piston wells. EFFECT: enhanced reliability. 3 cl, 5 dwg