Patent ID: 9346351
Filing Date: 2016-05-24
CPC Classification: B60K,Y10T

Claim Text:
1. A valve device comprising: a first valve member opening or closing a fuel tank with respect to an outside, the first valve member being operated such that a fluid flows out of the fuel tank; a first passage through which the fluid flowing out of the fuel tank flows when the first valve member is open; a second passage provided separately from the first passage; a second valve member opening or closing the second passage such that the fluid flowing out of the fuel tank flows through the second passage when the second valve member is open; and a specific chamber arranged upstream of the second passage so that the fluid flowing out of the fuel tank flows into the specific chamber just before flowing into the second passage, the specific chamber having a collision part being symmetrical in a mirror image, wherein the specific chamber is provided such that the fluid collides the collision part and is divided into two divided flows when the second valve member is open, the two divided flows are in an asymmetrical state in which one divided flow has a different pressure loss that is different from a pressure loss of the other divided flow, the valve device further comprises a third passage through which the fluid flowing out of the fuel tank flows just before flowing into the specific chamber when the second valve member is open, and when (i) an axis point of the second passage at an opening of the second passage opened to the specific chamber is defined as an outlet center, and (ii) an axis point of the third passage at an opening of the third passage opened to the specific chamber is defined as an inlet center, at least one of the outlet center and the inlet center is positioned other than the symmetry plane in the mirror image of the collision part so as to cause the asymmetrical state of teh two divided flows.