Oil Sump Changeover Valves

OIL SUMP CHANGEOVER VALVES




The oil supply system of the S62B50 engine is specifically designed for the M5, due to its ability for high speed cornering (transverse acceleration of up to 1.2 g) that could cause the engine oil to be forced (and trapped) into the outer edge of the cylinder head and the rear area of the oil sump. To prevent oil starvation from occurring during these driving situations, two additional scavenging oil pumps are installed within the main oil pump housing. The main oil pump's function is to supply the engine with the required volume of oil for all of its lubrication needs. The two additional pumps only supply the oil sump with the scavenged oil.

Each additional oil pump incorporates a solenoid changeover valve that is connected to two scavenging tubes that pickup from the rear section of the oil pan and the outer edge of the cylinder head. The scavenging tubes in the oil pan crossover so that the right side pump draws from the rear left side of the pan and the left pump from the right side of the pan.

When cornering at forces > 0.9 g, the MS S52 will switch one solenoid to draw oil from the cylinder head while the second solenoid will continue to draw oil from the rear of the pan. The MS S52 control module receives the G-force signal from the DSC control module over the can line.