Abstract: A fuel filler module fits in the filler pipe of an automotive fuel tank and includes a spring biased trap door assembly that cooperates with a fuel nozzle restrictor to seal an open end of the filler pipe automatically when a fuel nozzle is withdrawn. The trap door assembly includes positive and vacuum pressure relief valves for maintaining fuel tank pressure within certain limits. The fuel filler module also includes a fuel nozzle guide that is part of a vent system for venting the fuel tank during the refuelling process and a splash guard feature that prevents splash back at the end of the refuelling process. The trap door assembly and an internal valve assembly are designed to be handled and installed as a unit to facilitate economical manufacture.

Abstract: A fuel filler module fits in the filler pipe of an automotive fuel tank and includes a spring biased trap door that cooperates with a fuel nozzle restrictor to seal an open end of the filler pipe automatically when a fuel nozzle is withdrawn. The fuel filler module also includes a fuel nozzle guide that is part of a vent system for venting the fuel tank during the refuelling process and a splash guard feature that prevents splash back at the end of the refuelling process. The fuel filler module comprises four-snap together components that are largely plastic parts or assemblies of plastic parts that are designed for easy molding to facilitate economical manufacture.