Iveco factory "Provent"

[goingbush]

doing a bit of research on the Iveco Daily 4x4 ( before deciding to buy)


reading thru the service manuals have 'discovered' these engines are full of good ideas, the F1A 2.3 litre engine had a factory Mann & Hummel provent cast into the cam cover




the 4x4 has the F1C 3.0 engine which has an even better system which consists of a rotating filter (centrifuge) on the end of a camshaft, the oil is condensed out of the crankcase vapour and returned to the sump via the camchain chamber , and clean air goes into the induction system pre turbo, excellent idea.



[TerryO]

Bump

[goingbush]

The 3.0 F1C engine in the Daily 4x4 has a improved -no maintenance system that uses a centrifuge in the oil vapour return system that further condenses any oil fumes, Its on the front of the engine driven from the timing train. Return vapour enters the air intake duct just after the MAF



translation from Italian is a little difficult to understand but you get the idea

Oil vapour recirculation (Blow-by)
Part of the gas produced by the combustion during the engine operation blows by the piston snap ring ports, in the oil sump, and mixes with the oil vapours present in the oil sump. This mixture, conveyed from the chain compartment to the top, is partially separated from the oil by means of a device situated on the top side of the distribution cover and is introduced in the air suction system. This device consists mainly of a rotating filter (3), fit flush on the stem (1), a high pressure/shaft control and a cover (2) where the valves (4 and 5), usually closed, are fitted. The diaphragm valve (4) regulates the partially purified mixture and keeps the pressure inside the chain compartment around a value of ~ 10 ? 15 mbar.
The umbrella valve (5) discharges some of the oil still present in the mixture coming from the filter (3) in the chain compartment and the oil condenses in the chamber (6).
Operation
The mixture which passes through the rotating filter (3) is partially purified from the oil particles, as a result of centrifugation, and so these particles condense on the cover walls to return to the lubrication circuit. The resulting purified mixture is let in through the stem holes (1) and the diaphragm valve consensus (4) inside the air vent upstream of the turbocharger. The opening/closing of the valve (4) depends mainly in the ratio between the pressure operating the diaphragm (4) and the depression below it. The oil still present in the mixture coming from the rotating filter (3) and which condenses in the chamber (6) is drained into the chain compartment through the umbrella valve (5), when the pressure that keeps it closed drops as a result of the engine stop.

[isuzurover]

I believe MANN+HUMMEL are a preferred supplier to Iveco.