INTERNAL COMBUSTION ENGINE VALVE TIMING GEAR Russian patent published in 2002 - IPC

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: proposed adjustable phases valve timing gear has spool shaft rotating in supports of cylinder cover and spools with recesses-gas ducts on side surface for alternate connection of intake and outlet channels with combustion chamber. Spool shaft is of sectional design consisting of spool and drive parts. Spool part can be axially shifted relative to drive part under action of fork of actuator of valve timing phase regulator. Width of trapezoidal recess of spool exceeds dimensions of gas exchange channels by value of axial displacement of shaft spool part. EFFECT: simplified design of adjustable valve timing gears. 2 dwg