FUEL PUMP AND A METHOD FOR CONTROLLING A FUEL PUMP

摘要

The invention relates to a fuel pump and a method for controlling a fuel pump (6). The fuel pump (6) comprises at least two pump means (6a, b) run at a mutual phase displacement such that they are able to receive fuel during different periods of time. A control unit (10) is adapted to causing a valve (11) which is only settable in an open position and a closed position to lead a desired amount of fuel to the respective pump means (6a, b). The control unit (10) is adapted accordingly to placing the valve (11) in the open position for a variable portion of said periods so that an individually controlled amount of fuel is led to the respective pump means (6a, b) during said periods. Maintenance of good efficiency of the fuel pump and low noise emissions is thus made possible in operating situations where the fuel pump delivers a reduced amount of fuel.