ELECTRONIC FUEL SWITCHING APPARATUS FOR A BI-FUEL VEHICLE USING A LPG AND A GASOLINE

摘要

The present invention relates to an electronic fuel switching device for a bi-fuel vehicle using gasoline and LPG and, more specifically, to an electronic fuel switching device for a bi-fuel vehicle using gasoline and LPG, integrally having a solenoid valve, a one-way valve, a boost pump, and the like in a change valve unit changing between gasoline fuel and LPG fuel and, therefore, conveniently installed in an engine compartment of a vehicle by being miniaturized, lightweight, and simplified. According to the present invention, the electronic fuel switching device for a bi-fuel vehicle using gasoline and LPG comprises: a high-pressure pump unit supplying the fuel to a vehicle engine; and the change valve unit changing the gasoline or the LPG and supplying the gasoline or the LPG to the high-pressure pump unit. The change valve unit includes: a body; a first inlet installed in the body and receiving the gasoline by being connected to a gasoline tank; a second inlet installed in the body and receiving the LPG by being connected to an LPG tank; a share outlet installed in the body and supplying the gasoline or the LPG by being connected to the high-pressure pump unit; a return inlet installed in the body and receiving the LPG returned by being connected to the high-pressure pump unit; a return outlet installed in the body and returning the LPG by being connected to the LPG tank; and a return solenoid valve installed in the body and opening and closing a return flow path connecting the return inlet and the return outlet.