Abstract: A method is described for monitoring an exhaust aftertreatment system of a combustion engine, with a pressure difference sensor that captures a first pressure difference between a first sampling point and a second sampling point. A second pressure difference between the second sampling point and the environment is captured. A defect is detected based on the second pressure difference.

Abstract: In a method and a device for diagnosing a differential pressure sensor of a particle filter of an internal combustion engine, where the differential pressure sensor is connected via a first pressure line to an exhaust-gas system upstream from the particle filter and via a second pressure line to the exhaust-gas system downstream from the particle filter and upstream from a rear muffler, a diagnosis of the first or second pressure lines is performed by evaluating a comparison of a differential pressure signal from a differential pressure sensor with modeled pressure values.

Abstract: A method is described for monitoring an exhaust aftertreatment system of a combustion engine, with a pressure difference sensor that captures a first pressure difference between a first sampling point and a second sampling point. A second pressure difference between the second sampling point and the environment is captured. A defect is detected based on the second pressure difference.

Abstract: In a method and a device for diagnosing a differential pressure sensor of a particle filter of an internal combustion engine, where the differential pressure sensor is connected via a first pressure line to an exhaust-gas system upstream from the particle filter and via a second pressure line to the exhaust-gas system downstream from the particle filter and upstream from a rear muffler, a diagnosis of the first or second pressure lines is performed by evaluating a comparison of a differential pressure signal from a differential pressure sensor with modeled pressure values.

Abstract: A method for adapting valve timings of an internal combustion engine, includes selecting multiple instantaneous operating points of the internal combustion engine by comparison to specified operating points, ascertaining a cylinder charge of at least one cylinder of the internal combustion engine at each of the selected operating points, ascertaining a charge error for each selected operating point from the difference of each ascertained cylinder charge from an expected value of the cylinder charge for the particular operating point, comparing the ascertained charge errors to expected charge errors, and ascertaining an adaptation value of the valve timings from the result of the comparison.

Abstract: A method for adapting valve timings of an internal combustion engine, includes selecting multiple instantaneous operating points of the internal combustion engine by comparison to specified operating points, ascertaining a cylinder charge of at least one cylinder of the internal combustion engine at each of the selected operating points, ascertaining a charge error for each selected operating point from the difference of each ascertained cylinder charge from an expected value of the cylinder charge for the particular operating point, comparing the ascertained charge errors to expected charge errors, and ascertaining an adaptation value of the valve timings from the result of the comparison.