| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a venting device for a fuel tank provided with a pressure valve for preventing blow-back of fuel during refueling by a simple constitution. <P>SOLUTION: The venting device for the fuel tank is furnished with a full fuel control valve FFV and a rollover valve FCV that are installed on the fuel tank FT; and a fuel tank valve unit 10 having a pressure valve 30 that is situated between a canister CN and the two valves. The pressure valve 30 is furnished with a casing 20 having a valve chamber 30S; a valve body 42 housed within the valve chamber 30S; and a spring 45. The valve body 42 has a disk-shaped valve part 43; and a side wall 44 that projects with tubular contours from the outside perimeter of the valve part 43, and has a cup shape defining a spring chamber 42s that is bounded by the valve part 43 and the side wall 44. The valve part 43 is perforated by an orifice 43b of smaller passage area than a valve aperture 36a. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
