Method for operating a drive unit for a motor vehicle, drive unit for a motor vehicle and computer program product

By defining specific operating ranges for the drive unit to determine either the sensor offset or the catalytic converter state parameter, the method addresses the challenge of accurately assessing vehicle catalytic converter performance, achieving precise measurements and improved accuracy.

DE102023210670A1Active Publication Date: 2025-04-30AUDI AG
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Patent Information

Application Number
DE102023210670
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-10-27
Publication Date
2025-04-30
Estimated Expiration
2043-10-27

AI Technical Summary

Technical Problem

Existing methods for operating drive devices in motor vehicles struggle to accurately distinguish between changes in pollutant content due to sensor offsets and changes in catalyst state, leading to inaccurate determination of vehicle catalytic converter performance.

Method used

The method involves defining two distinct operating ranges for the drive unit, where the sensor offset is determined in the first range and the catalytic converter state parameter is determined in the second range, thereby allowing for precise differentiation and accurate determination of both variables.

Benefits of technology

This approach enables precise determination of the sensor offset and the state of the vehicle catalytic converter, improving the accuracy of pollutant content measurement and catalyst performance assessment.

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Abstract

The invention relates to a method for operating a drive unit (1) for a motor vehicle, which comprises an exhaust gas-generating drive unit (2), an exhaust gas aftertreatment unit (12) designed as a vehicle catalyst for aftertreating the exhaust gas, and a pollutant sensor (15) arranged downstream of the exhaust gas aftertreatment unit (12) that reacts to nitrogen oxides and ammonia for determining a pollutant content in the exhaust gas, wherein the pollutant content is determined from a measured value of the pollutant sensor (15) and a sensor offset. It is provided that the sensor offset is determined only in a first operating range (16) of the drive unit (2) and a catalyst state parameter is determined only in a second operating range (17) of the drive unit (2) that differs from the first operating range (16). The invention further relates to a drive unit (1) for a motor vehicle and a computer program product.
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Citation Information

Patent Citations

  • Method and device for controlling a sensor

    DE10223385A1

  • Method for determining an offset value of a sensor signal and device for carrying out the method

    DE10339062A1

  • Regenerating a nitrogen oxides storage catalyst arranged in the exhaust gas stream of an IC engine

    DE19828609A1

  • Monitoring method for NOx storage catalysts and emission control device for carrying out this method

    DE19852240A1

  • calibration of a NOx sensor

    DE19911664A1

Cited By

  • Method for monitoring pollutant emissions from a drive unit for a motor vehicle, corresponding drive unit for a motor vehicle and computer program product

    DE102024133215B3