POSITIVE CRANKCASE VENTILATION SYSTEM BLOW-BY GAS REFLUX FITMENT FOR INTERNAL-COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To constitute a tournament type channel structure for distributing a blow-by gas to each cylinder without upsizing a cylinder head 1 or the like. SOLUTION: A cylinder head cover 2 comprises a blow-by gas main channel 22 serving as a first channel 11 and a pair of communicating channels 23 branching sideways therefrom. A second channel 13 is formed in a shape of a groove along a mating surface P between the side edge of the cylinder head cover 2 and the upper flange surface of the cylinder head 1. The second channel 13 extends longitudinally along the cylinder bank to distribute the blow-by gas to two cylinders. A third channel 14 passing through the cylinder head 1 connects the end of the channel 13 at the upper end thereof and opens into an inlet port 6 at the lower end thereof. COPYRIGHT: (C)2004,JPO&NCIPI