Patent ID: 8490603
Filing Date: 2013-07-23
Classification: B60K,Y10T

Abstract:
1. A fuel tank valve device that communicates and shuts off a path between an interior of a fuel tank and outside, the fuel tank valve device comprising: a casing that includes (i) a first communication path connected to the outside, (ii) a second communication path connected to the fuel tank, and (iii) a valve chamber that forms a valve flow path that connects the first communication path and the second communication path, and a valve mechanism that is held in the valve chamber, and opens and closes the valve flow path according to pressure of the first communication path and the second communication path, wherein the valve mechanism includes a first valve unit that has (i) a pressure receiving surface that receives pressure from the first and second communication path, wherein an area of the pressure receiving surface is larger than a close sectional area of the first communication path, and (ii) a first valve connecting hole that forms a part of the valve flow path, and a second valve unit that opens and closes the first valve connecting hole, wherein the first valve unit is configured to close the valve flow path when the pressure of the second communication path exceeds a preset first pressure value, and the second valve unit is configured to open the first valve connecting hole when (i) the first valve unit closes the valve flow path, and (ii) the pressure of the second communication path exceeds a preset second pressure value that is greater than the first pressure value, thereby the valve flow path being opened through the first valve connecting hole.