BMW E60/E61 2004 - 10 – Fuel Tank and Fuel Pump

BMW E60/E61 2004 - 10 – Fuel Tank and Fuel Pump

5 Series models use two main fuel delivery systems. Naturally aspirated M54, N52, V8 (N62) engines use only an electric fuel pump. Turbocharged N54 engine models use an electric and mechanical fuel pump. M54 and N62 engine fuel injectors are installed in machine-bored holes in the intake manifold. An in-tank electric fuel pump delivers pressure-regulated fuel to the fuel rail, The fuel pump is controlled by the DME via a fuel pump relay (K96). It operates at a pressure of 3.5 bar (50.7 psi). N52 engine fuel injectors are installed in machine-bored holes in the cylinder head. An in-tank electric fuel pump delivers pressure- regulated fuel to the fuel rail. The fuel pump is a variable speed pump controlled by the EKP (electric fuel pump control) module and delivers only the amount of fuel needed for engine operation. This eliminates excess fuel delivery and reduces pump wear. It can operate at up to 5 bar (72.5 psi) and 95 liters (25 gallons) per hour. N54 engine direct fuel injection allows for precise metering of mixture and higher compression. This is made possible by locating a fuel injector for each cylinder centrally between the valves. The electric fuel pump delivers fuel to a high pressure fuel pump. The high pressure fuel pump is driven by a chain and can provide fuel pressure from 5 bar (72.5 psi) up to 200 bar (2900 psi).