Introduction
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Functional description
ProVent² 500 is a crankcase ventilation system with integrated oil separation and pressure control that reduces
vehicle emissions and minimizes deposits in the intake tract. The ProVent² 500 system separates the oily blow-
by gases produced during fuel combustion with a separator and reduces the residual oil content to a minimum
level.
The filter system essentially consists of an oil separator element and a pressure regulator. The ProVent² 500
can be used as an open system (oil separation only) or a closed system (with recirculation of the separated oil
and the residual gas, as well as control of the crankcase pressure). When the crankcase ventilation is open, the
pressure control is not effective. After flowing through the oil separator, the blow-by gas is led outside via the
outlet nozzle. During operation, an overpressure is created in the crankcase.
In the closed system, the separated engine oil is returned to the oil pan and is thus available to the oil circuit
again.
The formation of blow-by gases
Combustion gases (so-called blow-by gases between piston rings and bushings) enter the crankcase at each
working stroke of an engine. This would result in an unacceptably high pressure in the crankcase after a few
seconds. This is prevented by opening the crankcase at a suitable point.
The blow-by gases, which mix with oil mist from the engine, escape from this vent hole. ProVent² 500 can be
used as an oil separation system to prevent the blow-by gases from transporting the oil out of the engine after
prolonged operation and to prevent the environment from being polluted by oily blow-by gases. In turbocharged
engines, air can also enter the crankcase via the turbocharger's oil return system.
ProVent² 500 systems are designed for both original equipment and retrofit. The following illustrations show
possible superstructures and a cross-section of the system.
Figure. 1: Single system incl. Base module
Figure. 2: Modular design incl. Base module
Figure. 3: cross section ProVent² 500 complete module
Oil separator
Housing
Pressure
regulation
Gas inlet
Gas outlet
Oil drainage
Base modul