| 摘要 |
PURPOSE:To always enable valve timing adjustment with high precision by constituting so that the rotational phase for advance and delay, of a cam shaft in relation to a crank shaft can be changed by means of drive mechanism considering the number of revolutions and load of an engine through a lever, a piston and movable members. CONSTITUTION:An oil chamber 15 whose outer end is sealed with a disc-shaped cap 14 is formed in the central inner part of a timing pulley 12 provided on one end part of a cam shaft 11, and a lever 17 is fixed with a bolt 16 on one end part 11a of a the cam shaft 11 facing to this oil chamber 15. A projection part 19 of this lever 17 formed on an opposite side end part 19a to the rotational direction of the cam shaft 11 with a slant shape is arranged in the position facing to a cylinder 20 formed inside the pulley 12. A piston 21, on whose front end surface 21a a movable member 22 with such a shape as a column diagonally to its axial direction is integrally formed is inserted into the cylinder 20. And valve timing is enabled to be adjusted by reciprocating the piston 21 by means of a drive mechanism including an oil pressure supply means 25. |
