| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low-cost valve mechanism having a stable valve lift amount, for an internal combustion engine. <P>SOLUTION: The valve mechanism for an internal combustion engine comprises a tappet 2 reciprocating in slide contact with a cam 15 of a cam shaft 1, and a lash adjuster 16 provided in the middle of a power transmission path for transmitting valve opening/closing force to a valve stem 9 from the cam 15 through the tappet 2, the lash adjuster 16 comprising a nut member 18 having an internal thread 17, an adjust screw 20 having an external thread 19, and a return spring 21 for biasing the adjust screw 20, wherein the widthwise center of the cam 15 is arranged to be deviated from the center of the tappet 2 so as to generate rotational force in the tappet 2, and screwing directions of the external thread 19 and the internal thread 17 are selected so that the direction of the rotational force to be transmitted to the lash adjuster 16 becomes the direction to project the adjust screw 20 from the nut member 18. <P>COPYRIGHT: (C)2012,JPO&INPIT |
