Introduction - ENGINE LUBRICATION SYSTEM

1.9 JTD 8V

VIEW OF ASSEMBLY

1, Suction pipe with filter mesh

2, Oil pump

3, Oil filter cartridge

4, Water/oil heat exchanger

5, Main longitudinal duct

6, Jets (piston skirt cooling)

7, Vertical duct (camshaft support lubrication)

8, Oil return to sump

9, Engine oil pressure warning light switch

10, Turbocharger lubrication pipes

ENGINE OIL PUMP

The oil is drawn in from the sump by means of the vacuum created by the rotation of the sprockets fitted on the crankshaft.

Vacuum is present between the sprocket separating wall (2) and the oil sump suction pipe.

Pressure instead develops after the separating wall (2) in all the oil delivery pipes (4).

When the pressure exceeds 5 bar, the force exerted on the limiting valve (5) overcomes the reaction of the spring below and moves the valve to open the connecting pipe between the pressure chamber (3) and the low pressure chamber (1).

1, Low pressure chamber

2, Separating wall

3, Pressure chamber

4, Oil delivery pipe

5, Pressure limiting valve

Closed operating position of oil pressure limiting valve.

Bypass operating position of limiting valve.