Positive crankcase ventilation system

摘要

An engine assembly includes an engine defining a combustion chamber and a crankcase volume, together with an intake assembly. The intake assembly includes an air cleaner assembly, a throttle, and an intake manifold in a series arrangement and fluidly coupled with the combustion chamber. An air-oil separator is fluidly coupled between the crankcase volume and the intake manifold and defines a separator volume configured to extract oil from air flowing through the volume. The air-oil separator includes a first inlet port configured to direct a first air flow into the separator volume substantially along a first direction, and a second inlet port configured to direct a second air flow into the volume substantially along a second direction that generally opposes the first direction.

主权项

1. An engine assembly comprising:
an engine defining a combustion chamber, a camshaft volume, and a crankcase volume; an intake assembly including an air cleaner assembly, a throttle, and an intake manifold disposed in a series arrangement, the intake manifold being fluidly coupled with the combustion chamber, and wherein the throttle is disposed between the air cleaner assembly and the intake manifold; an air-oil separator fluidly coupled between the crankcase volume and the intake manifold, the air-oil separator defining a separator volume configured to extract oil from air flowing through the volume, and including:
a first inlet port configured to direct a first air flow into the separator volume substantially along a first direction;a second inlet port configured to direct a second air flow into the separator volume substantially along a second direction that generally opposes the first direction; andwherein the separator volume is adjacent to the camshaft volume, and separated from the camshaft volume by a partition; andwherein each of the first inlet port and second inlet port are respectively defined by the partition.