| 摘要 |
A closed crankcase emission control assembly (10) for an internal combustion engine (12) includes a replaceable filter element (73) having a ring of filter media (94); a first annular end cap (96) sealed to one end of the media ring; a sump container (124, 98) defined by a second annular end cap (98) sealed to the other end of the media ring and a cup-shaped valve pan (124) fixed to the second end cap (98); and a check valve (140) in the valve pan to block blow-by gas flow directly into the filter element (73) during engine operation, and to allow collected oil flow out of the sump container (124, 98) during engine idle or shut-down. The filter element (73) is located in a filter housing (14) including an inlet port (20) to receive blow-by gasses from the engine crankcase (32), and an outlet port (22) to provide the substantially oil and particulate free gasses to an induction system (44) (e.g. a turbocharger) and back to the engine crankcase (32). A pressure control assembly (70) can be provided with the emission control assembly (14) to maintain acceptable levels of crankcase pressure.
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