Fuel system for an internal combustion engine and a method to increase the vaporization temperature of a fuel used in a fuel system

An internal combustion engine comprising a fuel system comprising:

• a fuel tank;
• a fuel pump;
• a fuel filter device arranged downstream of the fuel pump;
• a first fuel conduit through which the fuel pump is arranged to supply fuel through the fuel filter device;
• a control valve, which opens and/or closes at a pre-determined pressure, said control valve arranged upstream of the fuel filter device and downstream of the fuel pump;
• and
• a check valve arranged upstream of the fuel pump to prevent the fuel from flowing back to the fuel tank.

A method to increase the vaporization temperature of a fuel used in a fuel system for an internal combustion engine, which fuel system comprises a fuel tank, a fuel pump, a fuel filter device arranged downstream of the fuel pump, a first fuel conduit through which the fuel pump is arranged to supply fuel through the fuel filter device, wherein the method comprises the steps:

• a) arranging a control valve upstream of the fuel filter device and downstream of the fuel pump, to control the fuel flow from the fuel pump;
• b) arranging a check valve upstream of the fuel pump in the first fuel conduit to prevent the fuel from flowing back to the fuel tank;
• and
• c) controlling the control valve to open at a predetermined pressure,
• wherein a pressure, which is less than the pre-determined pressure for opening of the control valve, is built up in the fuel pump after the internal combustion engine is turned off.