FUEL SUPPLY DEVICE FOR GAS ENGINE

摘要

A fuel supply device for a gas engine having a vaporizer (17) for gasifying a first fuel (FA); a primary regulator (18) for regulating the pressure of the first fuel (FA) introduced from the vaporizer; a fuel switchover valve (19) having a first entrance path (40A) for introducing the first fuel (FA) sent from the primary regulator, a second entrance path (40B) for introducing a second fuel (FB) sent out from a second fuel source (11B), and a common exit path (41) and capable of selectively connecting the first and second entrance paths (40A, 40B) to the exit path (41); a common secondary regulator (21) for regulating the first fuel (FA) or second fuel (FB), sent out from the exit path (41) of the fuel switchover valve (19), to a state of substantially atmospheric pressure and supplying it to a mixer (3); and a shutoff valve (20) for opening and closing a fuel path between the fuel switchover valve (19) and the secondary regulator (21) according to a stop and start of the gas engine (E). The vaporizer (17), the primary regulator (18), the fuel switchover valve (19), the shutoff valve (20), and the secondary regulator (21) are integrally connected to each other and unitized. By this, fuel piping between the regulators, the fuel switchover valve, the shutoff valve, and other elements is eliminated to make the fuel supply device inexpensive and compact.