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1. (WO2012049230) METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE

Pub. No.:    WO/2012/049230    International Application No.:    PCT/EP2011/067850
Publication Date: Apr 19, 2012 International Filing Date: Oct 13, 2011
IPC: F02D 41/00
F02D 41/14
F02D 41/22
F02M 25/08
Applicants: CONTINENTAL AUTOMOTIVE GMBH
HEINRICH, Stephan
WOODS, Brian
BALSDON, David W.
GRASS, Philippe
Inventors: HEINRICH, Stephan
WOODS, Brian
BALSDON, David W.
GRASS, Philippe
Title: METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE
Abstract:
The internal combustion engine (100) comprises at least one cylinder (119), an exhaust gas tract comprising a measuring device (116), and a tank ventilation system (120) comprising a purge air line (109). The purge air line (109) is designed for pneumatic communication between the tank ventilation system (120) and the at least one cylinder (119). The purge air line (109) has at least one sensor (101) for ascertaining a hydrocarbon content of a gas flow. A hydrocarbon content of a gas flow that flows from the tank ventilation system (120) to the at least one cylinder (119) is ascertained dependent on a measuring signal of the sensor (101). Furthermore, a fuel metering into the at least one cylinder (119) is controlled dependent on the ascertained hydrocarbon content. Furthermore, an exhaust gas characteristic of an exhaust gas flow that flows in the exhaust gas tract is detected by means of the measuring device (116) and compared with a specified target value. If the ascertained difference between the detected exhaust gas characteristic and the specified target value exceeds a specified threshold, a test is carried out to determine whether the sensor (101) has a malfunction.