Patent ID: 9592730
Date: 2017-03-14
CPC Classifications: B60K,Y10T

Claim:
1. A tank ventilation device for a motor vehicle, comprising: a ventilation line comprising a first branch and a second branch, wherein the first branch is connected via a connection to a filling tube for filling a tank of the motor vehicle and the second branch is connected to an accumulator for gaseous hydrocarbons, wherein the ventilation line is connected to the tank so that gaseous hydrocarbons which are displaced during refueling are re-circulated toward the connection into the filling tube via the ventilation line; a device for applying a pressure to the ventilation line for performing a leakage test of the tank ventilation device, when the filling tube is closed by a closure device; a float body provided in a chamber of the connection to the filing tube for preventing entering of liquid fuel into the ventilation line; and a retention element constructed as a grid arranged across a width of the chamber of the connection and located always entirely below the float body, said retention element preventing the float body from moving out of the chamber.