184000294 - INTRODUCTION - ENGINE LUBRICATION SYSTEM
ENGINE OIL SUPPLY CIRCUIT
GENERAL VIEW
The engine lubrication circuit is illustrated in the diagram.
1, Suction pipe with filter mesh2, Oil pump3, Oil filter cartridge4, Main longitudinal duct5, Sprays (piston skirt cooling)6, Vertical duct (camshaft support lubrication)7, Oil return to the sump8, Switch for engine oil pressure warning light
ENGINE OIL PUMP
The engine 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).
