| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable valve train capable of preventing a variation in valve lift adjustment amount between cylinders from occurring by the effect of thermal expansion in an internal combustion engine and suppressing an increase in size and weight, and collars. SOLUTION: The collars 164 and 166 formed of a ferrous material are brought into contact with the end parts of intervening drive mechanisms 120 formed of a ferrous material, and axially slidable through clearances between a front wall 154 and a bearing 162 and a cam cap. Accordingly, even if a large difference in thermal expansion is produced between a cam carrier 150 of an aluminum alloy material and a control shaft 132 of a ferrous material, the position relation between the intervening drive mechanisms 120 shows the same variation as that of the control shaft 132, and the drive mechanisms can be adjusted to a same lift amount for the intake valves of cylinders. Also, the intervening drive mechanisms 120 can be supported on the collars from both sides. COPYRIGHT: (C)2006,JPO&NCIPI
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