MANN + HUMMEL ProVent
MANN+HUMMEL Industrial Filters
4
3 Function
Description
ProVent is a system for crankcase ventilation
with integrated oil separation and pressure
control which reduces the emissions of
vehicles and deposits in the intake section to a
minimum.
The ProVent series separates the blow-by
gases containing oil which result during fuel
combustion by means of an oil separating
element, therefore reducing the residual oil
content of the gas to a minimum level.
The ProVent systems mainly consist of an oil
separating element, a pressure control system
and, depending on the model, an overpressure
or a bypass valve.
The mounting location and the design of the
respective components vary depending on the
size of the ProVent system.
ProVent oil separators can be used as open or
closed systems.
Both with closed and with open systems,
separated oil is routed back into the oil sump
and is then available for the oil circuit again.
With an open crankcase ventilation system,
the pressure control system is not active. After
flowing through the oil separator, the blow-by
gas is routed via the outlet fitting into the open.
In the process, overpressure results in the
crankcase during operation.
With a close crankcase ventilation system, the
crankcase pressure is regulated by the
pressure control system; after flowing through
the oil separator, the blow-by gas is routed via
the outlet fitting into the intake section of the
engine.
Production of blow-by gases
During each working cycle of an engine,
combustion gases (so-called blow-by-gases)
flow between the piston rings and the cylinder
sleeves into the crankcase.
On turbocharged engines, air can also flow
into the crankcase via the oil return of the
turbocharger.
This would result in an impermissibly high
pressure in the crankcase after a short time.
This pressure build-up is prevented by an
crankcase opening in a suitable location.
The blow-by gases mixed with oil mist from the
crankcase exit from this ventilation hole.
ProVent oil separating systems can be used to
prevent the blow-by gases from transporting oil
mist out of the crankcase and from polluting
the environment with blow-by gases containing
oil.
ProVent systems are designed both for use as
original equipment and for retrofitting.