Patent · US Active

Method for operating an exhaust burner, apparatus for performing such a method, and motor vehicle

US11939903B2 · kind B2 · utility

0Cited by

0References

20Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Christian Disch · Wimsheim, DE
Patrick Hoff · Tamm, DE
Torsten Kunz · Waldbronn, DE
William T. Krein · San Jose, US

Key dates

Filing date	Apr 19, 2023
Grant date	Mar 26, 2024
Priority date	—
Expiry date	Apr 19, 2043

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A method for operating an exhaust burner with a secondary air system downstream of a combustion engine of a motor vehicle. The method includes: activating an ignition device as a function of a release condition, the ignition device being heated up to a specifiable target temperature; metering fuel at a first time point into a combustion chamber of the exhaust burner at a first injection frequency using an injection valve, and the combustion chamber not being actively supplied with air; setting a first target air-mass flow using a secondary air system at a further, second time point, wherein the air-mass flow is increased strictly monotonically; controlling the air-fuel ratio to a first target air-fuel ratio as a function of a lambda sensor starting from the second time point, and metering fuel at a second injection frequency; setting a second target air-mass flow at a further, third time point.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.