Patent · US Active

Method for heating a catalytic converter

US11913396B2 · kind B2 · utility

0Cited by

4References

8Claims

0Family size

Assignee

Mercedes-Benz Group AG · DE

Inventors

Andreas Schaible · Weil im Schönbuch, DE
Andreas Schober · Erfurt, DE
Hans-Georg Lehmann · Eßlingen, DE
Markus Schilling · Ludwigshafen, DE

Key dates

Filing date	Mar 31, 2022
Grant date	Feb 27, 2024
Priority date	—
Expiry date	Mar 31, 2042

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for heating a catalytic converter includes a) switching on a compressor; b) at least partially opening an injection valve; c) setting a combustion-air/fuel ratio of λ<1 in combustion chambers; d) detecting an actual value of the oxygen content in the exhaust gas; and e) comparing the actual value with a target value, where the target value corresponds to an exhaust-gas oxygen content that would be set in a region of the catalytic converter if the combustion-air/fuel ratio in the combustion chambers is approximately λ=1, where a manipulated variable output by a controller on a basis of a deviation of the actual value from the target value is kept constant when the actual value reaches one of two limit values of a value range within which the target value is ranged, and where the two limit values deviate from the target value by approximately 3%.

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