How it works: the filling valve

How it works: the filling valve

You're probably wondering how the filling valve realizes that it is time to stop the flow of fuel when the tank is filled. No, it is not imposed elven spell, and built-in cameras, sensors, and nanotechnology radiopoplavki here, too innocent. If you look down the barrel of a gun, then a major, large channel will see a small canal.

How it works: the filling valve

This is a so-called vacuum channel, it leads to a ball valve in the top of the gun. Proceeding in the gun, gasoline displaces therefrom and without a small amount of air and gun compensates for pressure drop through this small sucking the air channel that is available in the vehicle fuel tank. Gradually gasoline displaces all air from the tank, the air ceases to flow into the vacuum channel, the ball valve "choking" and closes than actuates the occlusion mechanism and the main valve (at this moment you hear a click).