INTERNAL COMBUSTION ENGINE

An internal combustion engine includes a blow-by gas passage. The internal combustion engine further includes a ventilation case provided at an intermediate position of the blow-by gas passage. The internal combustion engine further includes a positive crankcase ventilation (PCV) valve provided in the blow-by gas passage and attached to the ventilation case. The PCV valve regulates the amount of blow-by gas flowing through the blow-by gas passage. The internal combustion engine further a plate covering the PCV valve and attached to the ventilation case. The internal combustion engine further includes a cover covering the plate and in contact with part of the plate.