A method for for a pressurized gas fuel system, an arrangement for a pressurized gas fuel system, and a vehicle comprising the arrangement

Abstract

A method (200) for a pressurized gas fuel system (130) of a vehicle (100) is presented. The pressurized gas fuel system (130) comprises a filling conduit (131), at least one gas fuel tank (132) connected to the filling conduit (131), and a gas fuel conduit (133) arranged from the at least one fuel tank (132) to an engine (101).The method (200) comprises:- determining (210) a pressure Pdet(Tdet) and a corresponding temperature Tdet of the gas fuel (135) in the pressurized gas system (130);- providing (220) an error indication (E) if the determined pressure Pdet(Tdet) is higher than a constant density pressure PD(Tdet) for the gas fuel (135) at the determined temperature Tdet; Pdet(Tdet) > PD(Tdet); wherein- the constant density pressure PD(T) is a function of a temperature T of the gas fuel (135) in the pressurized gas system (130), defines a constant density for the gas fuel (135), and comprises a predefined normal working pressure PNWP( Tref) for the gas fuel (135) at a reference temperature Tref.