Volumetric flow-controlled oil pump
The engine has a volume-flow-regulated oil pump. This volume-flow-controlled oil pump only delivers exactly as much oil as each operating range of the engine requires. Depending on the driving situation, for example, the following oil quantity is required:
- High engine speed: little oil
- High load: a lot of oil.
The volume-flow-controlled oil pump is an external gear pump that is driven via a drive chain by the crankshaft. On this volumetric-flow-controlled oil pump, the non-driven gear (oil pump drive gear) can be shifted axially, which varies the delivery volume. The operation of the volumetric-flow-controlled oil pump means that only the amount of oil required is delivered. This requirement-based control means that an average of up to 160 Watts less power is required than for a conventional oil pump. At approx. 6000 rpm, up to 1.25 kW of power is saved. The average fuel consumption is lowered by approximately 1%.
| Index | Explanation |
|---|---|
| 1 | Control oil chamber |
| 2 | Pressure limiting valve |
| 3 | Rotor |
| 4 | Vane |
| 5 | Pendulum slide |
| 6 | Inner rotor |
| 7 | Housing |
| 8 | Hole for oil pressure control valve |
| 9 | Damping oil chamber |
| 10 | 2 compression springs |
| 11 | Rotational axis |