Diesel engine fuel supply system
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 BMW 328xi, 2012 BMW 328i, 2011 BMW 328xi, 2011 BMW 328i, and 2010 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.
Fuel system
The fuel pump in the fuel tank supplies the engine with fuel. Two types of high pressure pump are used for direct injection.
- The distributor-type injection pump. This supplies each cylinder directly with fuel via individual injector nozzles.
- The high pressure pump for the common rail systems. This generates the required pressure in the injector pipe for all injector nozzles.
With common rail systems another pump (inline pump, M57/geared pump, M67) is connected between the high pressure pump and the fuel pump. This pump aids the fuel pump in the fuel tank during times of high fuel requirement.
Tank-venting system
Diesel fuel is slow-evaporating, therefore no carbon canister is required. The fuel tank is bled directly into the atmosphere.