Gas sensor i.e. wideband Lambda sensor, for determining oxygen concentration in exhaust gas, has layer covering anode with diffusion coefficient for fat gas molecules higher than coefficient for oxygen molecule of layer covering cathode

摘要

The sensor has an anode (150) and a cathode (140) arranged in or at an ion-conductive solid electrolyte (110). A pair of layers (156, 157) is separated from each other by an exhaust gas. The layer covering the anode has a diffusion coefficient for fat gas molecules higher than the diffusion coefficient for oxygen molecule of the layer covering/overlapping the cathode. The cathode and the anode are arranged on the solid electrolyte to form a sensor element. A hollow space is arranged between the cathode and a layer covering the cathode. Independent claims are also included for the following: (1) a method for operating a gas sensor (2) a computer program product with program code for performing a method for operating a gas sensor.