| 摘要 |
PROBLEM TO BE SOLVED: To make oil effectively stay on an upper surface of a tappet without interference of a cam of a rotating cam shaft with an upper end surface of a tappet guide and to secure stiffness of the tappet guide. SOLUTION: Not indicated tappet driven by the cam 32 of the rotating cam shaft 27 is guided by the tappet guide 29 in an axial direction thereof. The upper end surface of the tappet guide 29 is formed at a higher position than a top dead center position of the tappet. A downward recess part is formed at a roughly vertical part of a center line of the cam shaft 27. The upper end surface is constructed not to interfere with a rotation locus of the cam 32. Upper part thickness is larger than lower part thickness at a part of the tappet guide 29 having the recess part formed. COPYRIGHT: (C)2005,JPO&NCIPI
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