| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily adjust a variation in compression ratio. <P>SOLUTION: A double link type piston crank mechanism 2 of an internal combustion engine 1 is provided with a tubular eccentric sleeve 21 press-fitted in an eccentric shaft 9. Within a range of the compression ratio corresponding to a prescribed load, an eccentric direction of the eccentric sleeve 21 is determined to be perpendicular to a straight line L2 connecting the center of a second connecting pin 17 and the center C1 of the eccentric shaft part 9 where the second connecting pin connects a control link 7 and a lower link 6. Thus, an amount of adjusting a top dead center position of a piston can be easily converted to a rotation angle of the eccentric sleeve 21 and the top dead center position of the piston can be easily adjusted. <P>COPYRIGHT: (C)2012,JPO&INPIT |
