BLOW-BY GAS RECIRCULATION STRUCTURE FOR INTERNAL COMBUSTION ENGINE

摘要

PURPOSE: A blow-by gas recirculation structure and an internal combustion engine are provided to absorb pressure pulsation of the crankcase by recirculating blow-by gas into the intake path through a large cast space and supply stable blow-by gas to each intake path. CONSTITUTION: A blow-by gas recirculation structure comprises a plurality of intake paths(21A,21B,21C,21D) formed in a cylinder head(3), and cast spaces(25a,25c) which are formed between the intake paths. One end of the cylinder head is opened through an intake port in the combustion chamber while the other is opened on an intake manifold mounting surface(3d). The intake manifold installation side of the cast space is opened so that blow-by gas is fed back through the cast space to the air intake paths.