Patent · US Active

Method for ascertaining the nitrogen oxide fraction and/or ammonia fraction in the exhaust gas of an internal combustion engine

US11725602B2 · kind B2 · utility

0Cited by

1References

9Claims

0Family size

Assignee

VITESCO TECHNOLOGIES GMBH · DE

Inventors

Paul Rodatz · Landshut, DE
Gerhard Haft · Munich, DE
Erwin Achleitner · Obertraubling, DE
Florian Kleiner · Munich, DE

Key dates

Filing date	Jun 3, 2020
Grant date	Aug 15, 2023
Priority date	—
Expiry date	Jun 3, 2040

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Various embodiments of the teachings herein include a method for determining the nitrogen oxide content and/or ammonia content in the exhaust gas of an internal combustion engine with a catalytic converter arranged in an exhaust tract and an exhaust gas sensor downstream of the catalytic converter. In some embodiments, the method comprises: determining an operating state of the internal combustion engine, the operating state indicating either lean operation or rich operation of the internal combustion engine; generating a signal using the exhaust gas sensor; and determining the nitrogen oxide content and/or ammonia content in the exhaust gas at least partially based on the determined operating state of the internal combustion engine and the signal.

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