Blow-by gas returning device for V-type internal combustion engine

Claim 1

A blow-by gas returning device for V-type engine including an engine block with two banks of cylinders formed therein, two cylinder heads, a crankcase, an intake manifold with upper and lower faces, and engine air inlet passages, comprising, passages formed in the cylinder block parallel to the longitudinal axis of the cylinders, a collection chamber formed in the engine block in the space between the two banks of cylinders, said passages providing communications between the crankcase and said collection chamber, an oil separator with upper and lower mounting surfaces, said lower mounting surface having at least two ports formed therein, said upper mounting surface having one port formed therein, said oil separator having a multiplicity of internal baffles arranged in a labyrinth-type fashion, said oil separator being mounted atop the engine block such that said ports formed in said oil separator lower mounting surface are aligned over said collection chamber formed in the engine block, a passage formed through the intake manifold with openings in the upper and lower faces thereof, said passage lower face opening being aligned with said oil separator upper mounting surface port when the intake manifold is mounted on said oil separator, a PCV-valve fitted in said intake manifold passage upper face opening, and a pipe connecting said PCV-valve to the engine air intake passages.