Fuel system, controll arrangement and method for controlling a fuel system

Abstract

Control arrangement (100) and a method for controlling a fuel system (10) to supply fuel to a combustion engine (2) of a vehicle (1 ) at a pressure equal to or higher than a first threshold pressure. The fuel system (10) comprises one or more storage tanks (11 , 12, 13, 14) configured for storage of fuel. The fuel system (10) also comprises a first and a second intermediate tank (15, 16), each configured to receive fuel from the one or more storage tanks (11 , 12, 13, 14) for supply to the combustion engine (2). The fuel system (10) also comprises a control fluid circuit (20) adapted to supply a control fluid to each of the first intermediate tank (15) and the second intermediate tank (16) to compress fuel contained therein. The method comprises a step (a) of controlling the control fluid circuit (20) so as to supply control fluid to the first intermediate tank (15) at least until fuel contained therein reaches the first threshold pressure, and a step (b) of controlling the control fluid circuit (20) so as to supply control fluid the second intermediate tank (16) at least until fuel contained therein reaches the first threshold pressure, wherein steps (a) and (b) are performed sequentially and repeatedly.