Lubrication System
The lubrication system utilizes the same volumetric flow-controlled oil pump as seen on the six-cylinder N52/N54 engine. This type of oil pump offers the same reduction in fuel consumption as on past designs. The main difference on the N63 is that the oil pump is chain driven off of the rear of the engine rather than the front as on previous V-8 engines.
Scheme 846
In the same way as the 6-cylinder engines, the N63 engine is now equipped with a volumetric flow controlled oil pump. It is driven by the crankshaft on the flywheel side.
The oil pump is designed as a sliding-vane positive displacement pump with a control system that also operates in the same way as on the 6- cylinder engines.
Scheme 847
| Index | Explanation |
|---|---|
| 1 | Vane |
| 2 | Pump shaft |
| 3 | Compression spring |
| 4 | Intake side |
| 5 | Sealing strip |
| 6 | Slide |
| 7 | Oil chamber |
| 8 | Rotor |
| 9 | Pressure side |
| 10 | Pivot pin |
COMPONENTS DESCRIPTION CHART
The difference is that the oil pressure does not act on the control piston but rather directly on the slide. The oil pressure that acts on the slide is tapped off downstream of the oil filter and cooler, i.e. the pressure prevailing in the system.
Oil spray nozzles for timing chain lubrication
The oil spray nozzles for lubricating the timing chains are integrated in the chain tensioners of the two cylinder banks. They spray the engine oil directly on to the timing chains. A throttle in the oil spray nozzle limits the oil output.