FUEL FILLING APPARATUS AND METHOD FOR BI-FUEL VEHICLE

摘要

A fuel filling apparatus and method for a bi-fuel vehicle using both gasoline and liquefied petroleum gas (LPG) as a fuel are provided to. The fuel filling apparatus and method are capable of temporarily burning a portion of LPG fuel after collecting the fuel portion, using a gasoline fuel tank and a canister, when the internal pressure of an LPG fuel tank in the bi-fuel vehicle is equal to or greater than an LPG filling pressure of a filling gun. Additionally, the internal pressure of the LPG fuel tank is decreased to a level below the LPG filling pressure of the filling gun, thereby achieving smoother LPG fuel filling of the LPG fuel tank by the filling gun.

主权项

1. A fuel filling apparatus for a bi-fuel vehicle, comprising:
a solenoid valve mounted to a liquefied petroleum gas (LPG) fuel tank in the bi-fuel vehicle; a venting line connected to an outlet of the solenoid valve; a pressure sensor configured to sense a pressure of the fuel tank; a controller configured to operate the solenoid valve to be temporarily opened when the fuel tank pressure sensed by the pressure sensor is equal to or greater than a filling pressure of a filling gun, and to collect a portion of LPG fuel in the fuel tank; and a collector connected to a trailing end of the venting line, to collect the portion of the LPG fuel discharged through the solenoid valve, and to supply the collected LPG fuel to an engine, for temporary startup of the engine.