Fuel shut-off valves

摘要

A fuel shut-off valve includes a casing defining therein a valve chamber communicating between inside and outside of a fuel tank. A bottom wall member defines a bottom of the valve chamber and has communication holes formed therein, so that the valve chamber communicates with the inside of the fuel tank via the communication holes. A valve mechanism is disposed within the valve chamber and capable of preventing fuel from flowing from the valve chamber to the outside of the fuel tank depending of a fuel level within the fuel tank. A flow area of each of the communication holes decreases in an outflow direction of the fuel from the valve chamber to the inside of the fuel tank.

主权项

1. A fuel shut-off valve comprising:
a casing defining therein a valve chamber communicating between an inside and an outside of a fuel tank; a bottom wall member defining a bottom of the valve chamber and having communication holes formed therein, so that the valve chamber communicates with the inside of the fuel tank via the communication holes; wherein each of the communication holes is tapered to have a diameter decreasing in a direction from an upper surface side of the bottom wall member toward a lower surface side of the bottom wall; and a float valve disposed within the valve chamber and moving upward with rise of a fuel level of fuel within the fuel tank to prevent the fuel from flowing from the valve chamber to the outside of the fuel tank.