Patent ID: 8069713
Filing Date: 2011-12-06
Classification: F01N,F02B,F02D,Y02T

Abstract:
1. A method for evaluating the plausibility of a pressure difference which takes place between the two ends of a particle filter arranged in the exhaust zone of an internal combustion engine, by using a first measuring unit in order to determine the pressure difference value and a second measuring unit which determines a charging pressure of the internal combustion engine, the method comprising the steps of: allocating a charging pressure value of the internal combustion engine to each pressure difference value and storing the two characteristic values in a characteristic map, and identifying an incorrect pressure difference value at the time when the measured pressure difference value lies outside a predeterminable upper limit range and a lower limit range for the stored pressure difference value of the internal combustion engine that is allocated in each case to the charging pressure determined.