Engine Oil Circuit, Function - Mercedes-Benz OM 471 Introduction Into Service Manual

Functions
GF18.00>W>0001H
ENGINE 471.9 in MODEL 963
1 Oil pump
2 Oil intake manifold
2.1 Oil strainer
3 Oil/coolant module
3.1 Oil thermostat
3.2 Oil/water heat exchanger
3.3 Oil filter
4 Oil spray nozzle
5 Crankshaft bearing lubrication point
6 Turbocharger
7 Crankcase ventilation system oil
separator
8 Power take>off lubrication point
10 Intake camshaft
11 Intake rocker arm spindle
12 Intake camshaft bearing lubrication
point
13 Intake rocker arm
14 Exhaust camshaft
15 Exhaust rocker arm spindle
16 Exhaust camshaft bearing lubrication
point
All moving components on the engine, which are lubricated or
cooled by engine oil, are supplied with engine oil via the engine
oil circuit.
The lubrication reduces friction and mechanical wear on moving
components. Impacts are also absorbed by the oil buffer in the
bearings.
The engine oil circuit is supplied with engine oil via the oil pump
(1). The oil pump (1) is designed as a gear pump and is driven by
the pinion gear drive.
If the engine is started, the oil pump (1) sucks in engine oil in the
oil pan through the oil intake manifold (2) and the oil strainer
(2.1) fastened to it and pumps it to the oil/coolant module (3).
At an engine temperature of less than 115 ∞C the engine oil is
routed through the open oil thermostat (3.1) over a bypass
straight into the oil filter (3.3). At 115 ∞C the oil thermostat (3.1)
closes the bypass and the engine oil flows first to the oil>water
heat exchanger (3.2) before reaching the oil filter (3.3).
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Engine oil circuit, function

17 Exhaust rocker arm
18 Exhaust rocker arm with
hydroelement
19 Brake rocker arm
– This printout will not be recorded by the update service. Status: 09 / 2011 –
Y624 Engine brake solenoid valve, stage 1
Y625 Engine brake solenoid valve, stage 2
The oil>water heat exchanger (3.2) is used to cool the engine oil
after the engine's warm>up phase.
In the oil filter (3.3) the engine oil flows from the outside inwards
through the oil filter element, where it is cleaned.
Finally the engine oil enters the main oil ducts as well as the front
and rear oil cross ducts in the crankcase.
The main oil ducts mainly lubricate the crankshaft bearings, the
connecting rod bearings and the oil spray nozzles (4) with engine
oil.
The following oil ducts or oil pressure lines branch off from the
main oil ducts:
• The oil duct to the pressure regulating valve in the oil pump
(1)
The oil ducts to the cylinder head
•
• The oil ducts to the gearwheel drive
• The oil pressure line to the turbocharger (6)
The oil spray nozzles (4) spray engine oil continuously below the
piston crowns to ensure that they are cooled.
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20.7.11
W18.00>1064>76