Internal combustion engine with at least two cylinder bank rows

摘要

An internal combustion engine is provided with at least two cylinder banks whose cylinder heads are sealed by cylinder head covers. To ventilate the crankcase from the blow-by gases, ventilation lines are connected to the cylinder head covers and communicate with a negative pressure source, e.g., an intake pipe. The inside of the cylinder head cover is provided with structure for pre-separating the oil from the blow-by gases. An oil separation chamber is equipped with an inlet and an outlet opening, each as a part of the crankcase ventilation in the cylinder head covers. The oil separation chambers communicate with the respective camshaft space through their inlet openings. This arrangement ensures reliable crankcase ventilation in which a portion of the oil carried along by the blow-by gases can already be separated in the cylinder head cover and returned to the camshaft spaces.