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Home >> BMW >> 2013 >> M3 2D Convertible, Standard Trans >> Repair and Diagnosis >> General Information >> OEM General Information >> Functional Description -- M3 Convertible >> Engine Performance - Functional Description >> Fuel Supply MSS60 >> Overview of functions

Overview of functions

The pressure-controlled fuel supply with variable system pressure is handled by an electric fuel pump. The DME determines the requirement from the fuel pressure sensor signal and the operating condition of the engine. The DME sends the volume of fuel request as a CAN message across the Local Controller Area Network to the electric fuel pump.

The electric fuel pump converts the volume of fuel request into the activation of the fuel pump. The fuel pump is driven via an electrically commutated 3-phase electric motor. The value of the CAN message lies in the range between 0 and 100 % The electric fuel pump uses a characteristic curve to convert this value into a fuel pump speed and sets this speed at the fuel pump. With full activation of the fuel pump, the fuel pressure is limited by the mechanical pressure regulator in the fuel tank to 6.2 bar. For diagnostic functions of the DME, the electric fuel pump must send the following data via the Local Controller Area Network to the DME:

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