BMW 3: Fuel System
BMW 3 Series G20 (2018-2026) Training manual / B46TU-B48TU Engines / Fuel System
The fuel system is made up of the fuel supply and fuel preparation systems. The fuel supply includes the fuel tank with all mounted parts and the fuel lines up to the engine compartment.
The fuel preparation system consists of the fuel filter lines in the engine compartment and all the fuel system parts on the engine.
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Fuel preparation
The fuel preparation has again been adapted to meet the emission legislation
requirements. The high
pressure pump and the injectors have been revised and designed for an fuel
injection pressure of
3
Fuel high-pressure pump
The single-piston high pressure pump by Bosch, well-known from the B46
engine, is used. The high
pressure pump HDP6 is driven by a triple cam which is attached to the exhaust
camshaft. To be able
to
Direct rail
Injector mounting
Mounting bolts
Plastic sleeve (not required to be reinstalled after taken apart for
service)
Holding clamp with bayonet fitting
Rail
Solenoid valve injector
Casting lug
Th
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Monitoring functions
High-voltage interlock loop
The SME control unit evaluates the signal of the high-voltage interlock loop
and checks whether there
is an open circuit with this circuit. In the event of an open circuit, the
battery management electronics
control unit can cause the high-voltage system to perform a qu
Warning function
If you leave the lane
If you leave the lane and if a lane marking has
been detected, the steering wheel vibrates in accordance
with the steering wheel vibration setting.
If the turn signal is switched on before a lane
change, a warning is not issued.
Steering intervention
Depending on the equipment
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