| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for quickly and accurately adjusting a tappet clearance by judging whether the rotation angle of a crankshaft and the lift of a valve are in an appropriate relation or not. SOLUTION: A line segment A indicating an upper limit value of tolerance and a line segment B indicating a lower limit value of the tolerance are drawn as inspection quantity lines beforehand, and a line segment C indicating actual measured value and the inspection quantity lines are compared. In an embodiment, since change of the lift of the valve is smallest when a position right after the valve opens or right before the valve closes is defined as a reference of rotation angle of a crankshaft, it is judged whether the lift of the valve at that time is between the line segments A and B, and an adjuster screw is rotated and the tappet clearance is adjusted by a nut runner 30 provided on a robot 3 if the lift of the valve is between the line segments or in an adjustment range. Adjustment quantity is defined based on the lift, diameter and pitch of the adjuster screw. COPYRIGHT: (C)2008,JPO&INPIT
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