Patent ID: 9062623
Filing Date: 2015-06-23
Classification: F02D,G01N

Abstract:
1. A method for diagnosing an electrochemical sensor, which is a heatable exhaust gas sensor of an internal combustion engine, the method comprising: performing one of the following sets (a) and (b) of operations: (a) generating a predefined chronologically varying or constant voltage with the aid of a voltage source; (b) generating a predefined chronologically varying or constant current with the aid of a voltage source; wherein the method is executed independently of a control and/or regulating unit of the internal combustion engine, and wherein an operating temperature of the exhaust gas sensor is regulated to a predefined temperature value with the aid of a regulating element, which is separate from the control and/or regulating unit, and wherein the voltage is applied to the terminals, which are connected to electrode of a cell of the exhaust gas sensor, and a pump current is detected as the current.