Method for ascertaining a NOx concentration and a NH3 slip downstream from an SCR catalytic converter

US11261774B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Christian Daniel · Leonberg, DE
• Edgar Klenske · Renningen, DE
• Heiner Markert · Stuttgart, DE
• Martin Schiegg · Strohberg, DE
• Stefan Angermaier · Stuttgart, DE
• Volker Imhof · Kornwestheim, DE

Key dates

• Filing date: Oct 9, 2018
• Grant date: Mar 1, 2022
• Expiry date: Oct 9, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A method is provided for ascertaining a NOx concentration and an NH3 slip downstream from an SCR catalytic converter of an internal combustion engine of a vehicle. State variables of an internal combustion engine as first input variables and an updated NH3 fill level of the SCR catalytic converter as a second input variable cooperate with at least one machine learning algorithm or at least one stochastic model. The at least one machine learning algorithm or at least one stochastic model calculates the NOx concentration and the NH3 slip downstream from the SCR catalytic converter as a function of the first input variables and the second input variables and output the same as output variables.