PCV valve mounting structure
AssigneeAisan Kogyo Kabushiki Kaisha
InventorRikako Muramatsu
Life of this patent
Estimating the term…
Abstract
A PCV valve mounting structure includes a cylinder head of an engine, an intake manifold coupled with the cylinder head to form a blow-by gas passage. A PCV valve is disposed in the blow-by gas passage. The PCV valve includes a valve case and a plurality of seal members elastically supporting the valve case on the cylinder head and the intake manifold. The PCV valve is configured to control a flow rate of the blow-by gas depending on the negative intake pressure of the engine. The PCV valve has a measuring passage configured to adjust the flow rate of the blow-by gas and positioned upstream of the seal members. An annular space is formed between the cylinder head and the valve case. The annular space extends in the lengthwise longitudinal axial direction from an upstream end of the valve case.
Claims2
A PCV valve mounting structure comprising:
- a cylinder head of an engine;
- an intake manifold coupled to the cylinder head to form a continuous blow-by gas passage;
- a PCV valve disposed in the blow-by gas passage and configured to control a flow rate of a blow-by gas in the blow-by gas passage based on a negative intake pressure of the engine, wherein the PCV valve comprises a valve case;
- and
- a seal member elastically radially positioned between the valve case and the cylinder head and supporting the valve case within the blow-by gas passage;
- wherein the PCV valve has a measuring passage configured to adjust the flow rate of the blow-by gas and positioned upstream of the seal member in the lengthwise longitudinal axial direction of the PCV valve;
- wherein an annular space between the cylinder head and the valve case extends from an upstream end of the valve case and has an upstream open end in communication with the measuring passage;
- and
- wherein the valve case is sealingly engaged with the cylinder head only on a downstream side of the measuring passage in the lengthwise longitudinal axial direction.
Dependencies are inferred from the claim text.