FUEL SYSTEM AND CORRESPONDING METHOD

The object of the present invention is to provide an inventive fuel system comprising a low pressure fuel system (4), a high-pressure fuel pump (5), a common rail (6), at least one fuel injector (7), and an engine management system (20). The engine management system (20) is adapted to initiate a recirculating cooling fuel flow through at least the high-pressure fuel pump (5) for avoiding fuel boiling by means of: said high-pressure fuel pump (5) being adapted to increase a target pressure of the fuel within the common rail (6) above a threshold level, the fuel system further comprising a high-pressure fuel relief valve (14) that is arranged downstream of said high-pressure fuel pump (5) and is connected to said low pressure fuel system (4), which high-pressure fuel relief valve (14) is adapted to open above said threshold level, such that at least part of the fuel supplied by said high-pressure fuel pump (5) is returned to said low pressure fuel system (4) via said high-pressure fuel relief valve (14).