Oil supply

Oil supply

The oil supply in line with requirements only delivers the amount of engine oil that is actually needed. The volume-flow-regulated oil pump lowers fuel consumption by up to 1 %.

Brief description of components

The following components are described for the oil supply:

Oil pressure switch

The oil-pressure sensor signals to the DME control module whether there is adequate oil pressure in the engine (switching point 0.5 bar).

Volume-flow-regulated oil pump

The engine has a volume-flow-regulated oil pump. This pump supplied exactly the amount of oil required by each operating range. The oil pump is an external gear pump. The oil pump is driven by a chain from the crankshaft.

System functions

The following system functions are described:

Engine ventilation heating

The N14 engine has engine ventilation heating. The engine ventilation heating is at the entry to the fresh air pipe. Engine ventilation heating is an optional extra (optional extra 842 cold country version).

At terminal 87 (terminal 15 On), the DME control module activates the engine ventilation heating via the engine ventilation heating relay. This supplies the engine ventilation heating with terminal 30. The engine ventilation heating relay is in the distribution box in the engine compartment.

Switch-on conditions:

• Terminal 15 ON
  
• Ambient temperature less than 2 °C
  
• Time after engine start less than 360 seconds
  (time is extended depending on engine oil temperature, coolant temperature as well as driving speed)
  
  

Notes for Service department

General information

Note: engine ventilation heating depends on the fitted options.

Option 842 cold country version is compulsory in various cold countries.

No liability can be accepted for printing or other faults. Subject to changes of a technical nature