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1. (WO2018157907) METHOD FOR MONITORING CRANKCASE PRESSURE

Pub. No.:    WO/2018/157907    International Application No.:    PCT/EP2017/001342
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Fri Nov 17 00:59:59 CET 2017
IPC: F02D 41/22
F02D 41/06
F02D 41/24
F01M 13/00
Applicants: MTU FRIEDRICHSHAFEN GMBH
Inventors: BALDAUF, Johannes
DUSSLER, Patrick
BUCHER, Eugen
KHAKHOLKA, Vadzim
Title: METHOD FOR MONITORING CRANKCASE PRESSURE
Abstract:
The invention relates to a method for monitoring crankcase pressure (pKG), in which a learning curve (LK) is calculated according to a target-actual deviation of the crankcase pressure, in which the target crankcase pressure is adjusted according to the learning curve (LK) and a limit curve (GK) is calculated according to the target crank case pressure and in which the actual crank case pressure (pKG(IST)) is monitored for exceedance of the limit curve (GK). The invention is characterised in that after an engine start with identification of a stationary operation of the internal combustion engine, the actual crank case pressure (pGK(IST)) is compared with a limit value (dpKG) and, if an exceedance of the limit value (pKG(IST)≥dpKG) is identified, the learning curve (LK) and, as a result, the limit curve (GK) are reset to their starting values.