Valve unit

A subunit for a machine driven by an internal combustion engine, said subunit comprising:

• a crankcase pressure valve and an idling vacuum valve, the crankcase pressure valve being connected to and communicating with a crankcase through a crankcase gas outlet, and through a crankcase gas inlet from an oil pan, wherein said crankcase gas outlet communicates with an air induction tube or with a clean air side of a filter chamber;
• wherein the crankcase pressure valve and the idling vacuum valve are integrated in a module housing which is mounted as a module on the internal combustion engine such that a direct connection of the idling vacuum valve to an additional crankcase gas inlet from the cylinder head is formed, and
• wherein the feeding of crankcase gases from the crankcase gas inlets from the cylinder head and from the oil pan to the crankcase gas outlet is regulated by the crankcase pressure control valve.