SYSTEM AND METHOD FOR RECOVERY OF REDUNDANT GASEOUS FUEL FROM A GASEOUS FUEL SUPPLY SYSTEM

A gaseous fuel supply system for a clean combustion engine having a fuel injector, the supply system comprising: a first gaseous fuel tank arrangement comprising at least a first gaseous fuel tank storing pressurized gaseous fuel; a fuel rail arranged to supply gaseous fuel to the fuel injector; a first supply line arranged to supply pressurized gaseous fuel from the first gaseous fuel tank arrangement to the fuel rail; at least one return line arranged to transport redundant gaseous fuel from at least one of the fuel rail and the clean combustion engine; and a control unit configured to: in response to a reduced demand in injection pressure of the gaseous fuel to the clean combustion engine, control transport of redundant gaseous fuel away from the fuel rail and/or the clean combustion engine via the return line.