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公开(公告)号：US10043352B2
公开(公告)日：2018-08-07
申请号：US15264644
申请日：2016-09-14
摘要： A diagnostic system for a crankcase ventilation system of a boosted engine includes a pressure sensor (i) disposed in-line along a make-up air (MUA) hose of the crankcase ventilation system and (ii) configured to measure a pressure in the MUA hose, the MUA hose connecting an induction system of the engine to a crankcase of the engine. The diagnostic system also includes a controller configured to: detect a mild acceleration operating condition of the engine; and in response to detecting the mild acceleration operating condition: obtain a plurality of pressure samples based on the measured pressure by the pressure sensor, compare the plurality of pressure samples to a fault threshold indicative of a disconnected MUA hose, and based on the comparing, generate a fault signal indicative of a disconnected MUA hose.
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2.发明申请公开(公告)号：US20180075713A1
公开(公告)日：2018-03-15
申请号：US15264644
申请日：2016-09-14
CPC分类号： G08B5/36 , F01M11/10 , F01M13/00 , F01M13/022 , F01M2013/027 , F02D41/0007 , F02D41/045 , F02D41/22
摘要： A diagnostic system for a crankcase ventilation system of a boosted engine includes a pressure sensor (i) disposed in-line along a make-up air (MUA) hose of the crankcase ventilation system and (ii) configured to measure a pressure in the MUA hose, the MUA hose connecting an induction system of the engine to a crankcase of the engine. The diagnostic system also includes a controller configured to: detect a mild acceleration operating condition of the engine; and in response to detecting the mild acceleration operating condition: obtain a plurality of pressure samples based on the measured pressure by the pressure sensor, compare the plurality of pressure samples to a fault threshold indicative of a disconnected MUA hose, and based on the comparing, generate a fault signal indicative of a disconnected MUA hose.
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