New Generation N62 Engine Chapter 5 P.2
Course Contents/Background Material
© BMW AG, Service Training
- Fuel pressure regulator
The pressure regulator is integrated in the fuel filter and the two
parts are only available as a single unit. There is only a return
line from the pressure regulator between the fuel pressure
regulator and the fuel tank.
The fuel pressure regulator is charged with the ambient air
pressure. The pressure regulator is supplied with air via a hose
to ensure that if there are any leaks in the pressure regulator, any
leaking fuel does not escape into the environment. This hose
stops in the intake air pipe behind the mass air flow sensor.
- Electric fuel pump (EKP)
The fuel pump is a two-part in-tank gear pump.
The first part is for the pre-delivery stage. It feeds the in-tank
gear pump pair which is designed for the delivery stage with
bubble-free fuel. The two parts are driven by the same electric
motor.
- EKP regulation
The fuel is delivered in accordance with fuel consumption by
engine-use controlled regulation. This produces the following
benefits:
- The load balance of the alternator and battery is improved
thanks to the lower fuel pump power demand
- The lower power input reduces the fuel pump's heat radiation.
This reduces the amount of fuel being heated in the fuel tank
- Integration of the crash-cut-out in the EKP regulation
- Longer EKP service life
- Omission of the EKP relay
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