Patent ID: 9085999
Filing Date: 2015-07-21
Classification: F01M

Abstract:
1. A PCV valve comprising: a housing having an inlet port and an outlet port; a valve member movable in an axial direction within the housing; and a monitoring portion formed on an inner wall of the housing and having a substantially circular shape in cross section along a direction perpendicular to the axial direction, wherein: the valve member has a first end portion, a second end portion opposite to the first end portion in the axial direction, and a tapered portion positioned between the first end portion and the second end portion, so that the first end portion has a diameter larger than a diameter of the second end portion; as the valve member moves in the axial direction within the housing, the position of the tapered portion changes relative to the monitoring portion, so that blow-by gas flowing into the housing from the inlet port flows out of the outlet port after the blow-by gas is monitored as the blow-by gas flows through a clearance defined between the monitoring portion and the tapered portion; a plurality of guide portions each configured as a rib are formed on the valve member to protrude radially outward from the tapered portion and to extend in the axial direction along the valve member, so that the plurality of guide portions slidably contact the monitoring portion of the housing; each of the guide portions has a first part and a second part respectively positioned on the side of the first end portion and the side of the second end portion; and the second part has a width smaller than a width of the first part.