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公开(公告)号:US20200224565A1
公开(公告)日:2020-07-16
申请号:US16740216
申请日:2020-01-10
发明人: Scott E. MARTIN , Matthew C. GILMER , David E. FLETCHER , Mitchell EMOND , Chester E. DUFFIELD, III , David SNOW , Joseph Dennis
摘要: Flow control devices herein have a housing defining a plurality of parallel conduits. The first conduit has a normally closed check valve defined to open under a first preselected pressure differential controlling flow through the first conduit in a first direction of flow. The second conduit has a normally neutral check valve defined to open under a second preselected pressure differential in a second direction of flow that is opposite the first direction of flow. The third conduit defines a restriction profile, i.e., has a restrictor, having a third preselected pressure differential. The flow control devices are included as part of an engine system, more specifically a crankcase ventilation breach detection system.