| 摘要 |
<p>Tappets (10; 43; 100; 160) having a cylindrical body (12) are provided with friction reducing bearing portions (14; 90; 126, 128; 162, 164, 166) which project radially further than the remainder of the body (12). Each bearing portion has means (26, 28; 50, 58; 60; 70, 74; 92; 132, 134, 136, 138) to form a convergent gap with the bore (30) in which the tappet slides. The convergent gap forms a hydrodynamic oil lubrication film (150).</p> |
