Abstract: A sensor for determining gas components and concentrations in a gas mixture that is particularly suitable for analyzing HC, NOx and CO in exhaust gases of internal combustion engines in the sensor, an outer electrode, that is separated from an MOx electrode by an electrolyte layer, is applied on a substrate. In this context, the outer electrode and the MOx electrode are in communication with the gas mixture to be analyzed. In addition, the outer electrode contains a region that is in contact with a gas-permeable tunnel layer which in turn contains a region that is directly exposed to the gas mixture to be analyzed, so that the gas to be analyzed can be supplied to the outer electrode via the gas-permeable tunnel layer.

Abstract: A sensor determines the concentration of gas components in a gas mixture with at least one measuring electrode exposed to the gas mixture and a reference electrode and with a heating device for controlling the temperature of at least one measuring electrode and the reference electrode. A measurement signal taken off the at least one measuring electrode can be changed via a corrective value, which is dependent upon the heating power of the heating device necessary to reach a pregiven value of the heating resistance of at least one heating element of the heating device.

Abstract: A gas sensor in the form of a mixed-potential sensor in which the influence of temperature-dependent interference is reduced. An improved temperature control is provided with the help of a temperature sensor mounted on the surface of the electrolytic substrate.

Abstract: A method and a device are described for evaluating a signal from an ionic current sensor of an internal combustion engine. Based on a signal from the ion current sensor, at least one quantity characterizing the combustion in the internal combustion engine is determined. At least one quantity characterizing a combustion start and/or a combustion quality is determined by conditioning the signal.

Abstract: A method and a device for analyzing a signal from an ion current sensor of an internal combustion engine. At least one torque quantity characterizing the torque produced by the internal combustion engine is determined on the basis of a signal from the ion current sensor.