7 Series E65 735i (N62) SAL
16 00
Fuel supply system E38 / E39 (spark-ignition engines)
1. General
General function description of fuel systems.
2. Parts designation
1. Fuel tank (E38 steel, E39 plastic)
16. Float valve (USA only)
2. Electric fuel supply pump
17. Fuel return line
3. Surge chamber
18. Fuel feed line
4. Suction jet pump
19. Fuel filter
5. Pressure limiting valve
20. Pressure regulator
6. Outlet protection valve
21. 3/2-way valve (M52 USA only)
7. Pressure test line (USA only)
22. Fuel rail
7. Refueling vent line (worldwide)
23. Purge line
8. Non-return flap
24. Engine control unit
9. Filler pipe
25. Tank vent valve
10. Tank cap
26. Intake manifold
11. Tank expansion line
27. Vacuum line (LDP USA only)
12. Refueling vent line (USA only)
28. Carbon canister
12. Refueling vent line (worldwide)
29. Evaporation line
13. Service vent line
30. Leakage diagnosis pump (USA only)
14. Expansion tank
31. Tank leakage diagnostic module (USA only)
15. Roll-over valve
32. Dust filter (USA only)
3. Function description (see also drawing 5.1 / 5.2 / 5.3 / 5.4 / 5.5)
Fuel system
The saddle-shaped fuel tank contains the surge chamber with the electric fuel supply pump on its right side.
The surge chamber ensures that the fuel supply pump is properly supplied in all vehicle operating states. The suction
jet pump installed in the base of the surge chamber supplies the surge chamber with fuel.
The fuel is repumped from the left side of the fuel tank into the surge chamber via the suction jet pump integrated in the
tank expansion line. Both suction jet pumps are operated via the fuel feed line.
The pressure limiting valve controls the pressure required to operate the suction jet pumps. The outlet protection valve
protects the fuel return line. The valve closes in the event of a pressure drop when the fuel return line is damaged or
disconnected.
This prevents fuel from escaping from the fuel tank in extreme vehicle positions (overturning, inclined position).
The non-return flap prevents fuel from splashing back in the filler pipe after shutdown of the petrol/gas pump nozzle.
Fuel supply to engine
M52TU (see drawing 5.2, view A)
RA Fuel supply system E38 / E39 (spark-ignition engines)
BMW AG - TIS
08.02.2013 04:43
Issue status (12/2007) Valid only until next DVD is issued
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