| 20100018605 | FUEL DETECTION DEVICE - A fuel detection device, in a fuel nozzle fitted with a fuel-dispensing pipe, includes the fuel-dispensing pipe and a bushing arranged inside the dispensing pipe. The pipe and the bushing form an annular interspace and realize a condenser whose plates are the pipe itself. The bushing, and the condenser being suitable for measuring the dielectric constant in the zone of the annular interspace by measuring the capacity of the condenser and in such as way as to detect the presence of fuel in the aforesaid annular interspace, the fuel detection device uses a reference capacity measurement obtained from the value of the dielectric constant of air in the annular interspace at an instant prior to the insertion of the nozzle into the inlet of the tank of the vehicle to fill. | 01-28-2010 |
