
{"publication_number": "US-2013060445-A1", "abstract": "a device for error monitoring in an internal combustion engine system is provided . the internal combustion engine is supplied with air at a volumetric efficiency indicating the ratio of a real volume flow of air in the internal combustion engine to an ideal , theoretically possible , volume flow of air in the internal combustion engine . the device for error monitoring is configured to determine an error in the engine system when a difference between a measured volumetric efficiency and an estimated volumetric efficiency exceeds a predetermined absolute value .", "application_number": "US-201213598399-A", "description": "reference is made to fig1 . an engine system 2 having an internal combustion engine 4 is illustrated in fig1 . fresh air 10 is supplied via an air supply 6 to internal combustion engine 4 initially in the flow direction identified by arrows . an air mass flow measuring device 12 , in the form of a hot film air mass flow sensor , for example , which measures fresh air mass flow 11 and outputs it to an engine control 13 , is situated in air supply 6 . alternatively , the fresh air supply may also be modeled and the necessary sensor may be modeled at another place in the air system . subsequently , symbol { dot over ( m )