VALVE FOR CONTROLLING VAPOR INPUT AND OUTPUT OF FUEL TANK

摘要

A gas control valve of a fuel tank is provided to control the internal pressure of the fuel tank to a proper level in a short transition period and reduce the deterioration of performance to secure high durability. An inlet check valve part for blocking the outflow gas in the fuel tank direction and an outlet check valve part for blocking the inflow gas in the fuel tank direction are mounted in parallel to each other between an opening of a housing at the fuel tank side and an opening at the atmosphere side. At least one of the outlet check valve and the inlet check valve is mounted with a fine connection hole(213) connecting the atmosphere side to the fuel tank side constantly.