Oil Pump: Description and Operation

Oil Circulation:



Image Legend:
1 Oil sump
2 Oil suction snorkel
3 Oil pump
4 Overpressure valve
5 Full-flow oil filter
6 Intermediate shaft
7 Oil-to-water heat exchanger
8 Camshafts
9 Crankshaft
10 Oil return pumps
11 Chain tensioner
12 Oil pressure sensor
13 Valves for piston cooling
14 Oil-level sensor
15 Hydraulic valve tappet
16 Oil temperature sensor

Oil Supply:



In order to ensure a reliable engine oil supply even with extreme longitudinal and lateral acceleration, the Boxster has an integrated dry-sump lubrication system (without external oil tank), i.e. the oil sump is situated opposite the crankgear.

A special die-cast method means that it is possible to cast the oil channels into the crankcase. As a result, drilling as well as the subsequent cleaning processes are no longer necessary.

The oil pump (3) driven via the intermediate shaft (6) draws the oil out of the oil sump (1) via the oil suction tube (2) and then transfers it to the lubricating points.

Oil Repeller:

The oil repeller leads the returning oil back to the oil sump via the oil collection channel and collection edge.

Oil Return Pump:



Since there is no drop between the cylinder heads and oil sump in a Boxer engine, the oil is drawn out of each of the cylinder heads by a oil return pump.