Crankcase ventilation system for a hydrogen fueled engine

A crankcase ventilation system for an internal combustion engine, comprising:

• a first valve for controlling airflow into the engine's crankcase, with said airflow originating within an induction system associated with the engine;
• a second valve for controlling airflow from the crankcase, with said outflow originating from a different portion of the engine's crankcase than the portion through which air enters through said first valve;
• a separator for receiving air flowing from the second valve and for removing oil entrained in said air;
• and
• a return line for conducting air from said separator to said induction system, wherein said airflow through said first valve originates upstream of a flow restriction in said induction system, and said return line conducts air from said separator to a first portion of said induction system which is downstream from said flow restriction, as well as to a second portion of said induction system which is upstream from said flow restriction, with said second portion of said induction system comprising a venturi through which air being inducted into the engine flows.