초록 ▼

A closed crankcase emission control assembly for an internal combustion engine includes a replaceable filter element having a ring of filter media; a first annular end cap sealed to one end of the media ring; a sump container defined by a second annular end cap sealed to the other end of the media r

A closed crankcase emission control assembly for an internal combustion engine includes a replaceable filter element having a ring of filter media; a first annular end cap sealed to one end of the media ring; a sump container defined by a second annular end cap sealed to the other end of the media ring and a cup-shaped valve pan fixed to the second end cap; and a check valve in the valve pan to block blow-by gas flow directly into the filter element during engine operation, and to allow collected oil flow out of the sump container during engine idle or shut-down. The filter element of the present invention is located in a filter housing including an inlet port to receive blow-by gasses from the engine crankcase, and an outlet port to provide the substantially oil and particulate free gasses to an induction system (e.g. a turbocharger) and back to the engine crankcase. A pressure control assembly can be provided with the emission control assembly to maintain acceptable levels of crankcase pressure.

대표청구항 ▼

[ What is claimed is:] [1.] A replaceable filter element for a crankcase emission control assembly, the replaceable filter element comprising:a ring of filter media circumscribing a central cavity and having a first end and a second end;a first annular end cap sealingly attached to the first end of

[ What is claimed is:] [1.] A replaceable filter element for a crankcase emission control assembly, the replaceable filter element comprising:a ring of filter media circumscribing a central cavity and having a first end and a second end;a first annular end cap sealingly attached to the first end of the filter media ring, said first-end cap having a central opening into the central cavity of the filter media ring;a second annular end cap sealingly attached to the second end of the filter media ring, said second end cap also having a central opening into the central cavity of the filter media ring, said second end cap further including a cylindrical portion toward the periphery of the second end cap extending away from the filter media ring, and an annular, radially-outward directed catch on the cylindrical portion; anda cup-shaped valve pan having a cylindrical sidewall and an end wall, the cylindrical sidewall of the valve pan including an inwardly-directed, circumferentially-extending channel receiving the annular catch of the second end cap to fix the valve pan to the second end cap and define a sump chamber between the valve pan and second end cap in fluid communication with the central cavity of the filter media ring; and a check valve in the valve pan having at least one flow opening and a movable valve member, wherein the valve member can move to a first position, blocking flow through the at least one flow opening, and a second position, allowing flow through the at least one flow opening.