US 2019/0195115 A1 · EXHAUST GAS AFTERTREATMENT SYSTEM AND METHOD FOR EXHAUST AFTERTREATMENT OF AN INTERNAL COMBUSTION ENGINE

Abstract

The invention relates to an exhaust gas aftertreatment system for an internal combustion engine, in particular for a gasoline engine that is spark-ignited by means of spark plugs. A four -way catalytic converter and at least one three-way catalytic converter are situated in an exhaust gas system that is connected to an outlet of the internal combustion engine. An exhaust gas burner with which hot exhaust gas is introducible into the exhaust gas system directly downstream from the four-way catalytic converter is provided at an exhaust duct of the exhaust gas system. The exhaust gas burner is supplied with fresh air by a secondary air pump. The invention further relates to a method for exhaust aftertreatment of an internal combustion engine having such an exhaust gas aftertreatment system.

Claims10

Dependent claims

An exhaust gas aftertreatment system for an internal combustion engine, comprising:

an exhaust gas system that is connectable to an outlet of the internal combustion engine, wherein the exhaust gas system includes an exhaust duct in which at least one three-way catalytic converter and a four-way catalytic converter are situated,
an introduction point, directly upstream from the four-way catalytic converter, at which the hot exhaust gases of an exhaust gas burner of the exhaust gas aftertreatment system are introducible into the exhaust gas system for heating the four-way catalytic converter.

Dependencies are inferred from the claim text.

Facts

Application

16/224,167Filed 18 Dec 2018

Priority

DE 10 2017 130 886.521 Dec 2017

Published

27 Jun 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification24 codes

F01N 13/0093
Having two or more separate purifying devices arranged in series: the purifying devices are of the same type
F01N 3/023
By means of filters: using means for regenerating the filters, e.g. by burning trapped particles
F01N 3/025
Using means for regenerating the filters, e.g. by burning trapped particles: using fuel burner or by adding fuel to exhaust
F01N 3/035
In combination with other devices: with catalytic reactors

Exhaust gas aftertreatment system and method for exhaust aftertreatment of an internal combustion engine

Life of this patent

Exhaust gas aftertreatment system and method for exhaust aftertreatment of an internal combustion engine

Life of this patent

Abstract

Claims10