Patent ID: 8788184
Filing Date: 2014-07-22
Classification: F01N,Y02T

Abstract:
1. An apparatus for the self-diagnosis of an exhaust gas probe ( 20 ), the exhaust gas probe ( 20 ) having at least one heating element ( 26 ) and the exhaust gas probe ( 20 ) being connected to a controller, and the controller having devices for the diagnosis of the exhaust gas probe ( 20 ), characterized in that the controller has at least one calculating unit for the determination, in a modeled manner, of a parameter which denotes the correct operation of the exhaust gas probe ( 20 ), this parameter determined from parameters of the gas stream, and comparing said parameter with a measured parameter by means of at least one evaluation unit which is integrated into the controller, and determining the exhaust gas probe ( 20 ) is defective when a deviation exceeds a defined tolerance limit, or determining a faulty condition exists in an exhaust gas section ( 17 ), in which the exhaust gas probe ( 20 ) is installed.