Patent · US Active

System and method for exhaust gas aftertreatment of an internal combustion engine

US11193411B2 · kind B2 · utility

2Cited by

1References

10Claims

0Family size

Assignee

VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

Stefan Paukner · Wolfsburg, DE
Falk-Christian Baron Von Ceumern-Lindenstjerna · Braunschweig, DE

Key dates

Filing date	Jan 28, 2020
Grant date	Dec 7, 2021
Priority date	—
Expiry date	Jan 28, 2040

Classification

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

Abstract

An exhaust gas aftertreatment system for an internal combustion engine charged by an exhaust gas turbocharger and spark-ignited by means of spark plugs has a particulate filter and a first three-way catalytic converter downstream from the particulate filter in a position close to the engine in an exhaust gas system connected to an outlet of the internal combustion engine and another three-way catalytic converter arranged in the underbody position of the motor vehicle, downstream from the first three-way catalytic converter. An exhaust gas burner is active from the start of the engine, introducing hot exhaust gas into the exhaust gas system downstream from the particulate filter, in order to heat at least one of the three-way catalytic converts to a light-off temperature, as quickly as possible after the cold start, thereby allowing an efficient exhaust gas aftertreatment. The exhaust gas burner can be switched off when at least one of the two three-way catalytic converters has reached its light-off temperature.

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