US 2016/0258372 A1 · METHOD FOR ADJUSTING THE AIR-FUEL RATIO IN THE EXHAUST GAS OF A DIRECT INJECTION INTERNAL COMBUSTION ENGINE FOR NOx STORAGE CATALYTIC CONVERTER REGENERATION

Abstract

Method for adjusting the air-fuel ratio in the exhaust gas of a direct injection internal combustion engine, wherein the combusting fuel injection is divided into a plurality of individual injections, and wherein the air-fuel ratio in the exhaust gas of the internal combustion engine for a given load (PMI) is predictively adjusted by at least one model, by adjusting the position of the centroid of heat release conversion rates and the injection amount of the total combusting fuel injection, to a value that is necessary for the regeneration of an NOx storage catalytic converter in the exhaust system of the internal combustion engine.

Claims16

Dependent claims

A method for adjusting the air-fuel ratio in the exhaust gas of a direct injection internal combustion engine, comprising:

dividing, by an electronic control unit, combusting fuel injection into a plurality of individual injections;
and
predictively adjusting, by the electronic control unit, an air-fuel ratio in the exhaust gas of the internal combustion engine for a given load to a value that is necessary for regeneration of an NOx storage catalytic converter in the exhaust system of the internal combustion engine by adjusting a position of a centroid of heat release conversion rates and an injection amount of a total combusting fuel injection using at least one model.

Dependencies are inferred from the claim text.

Facts

Application

15/061,080Filed 4 Mar 2016

Priority

DE DE 102015204102.66 Mar 2015

Published

8 Sep 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

F02D 41/0275
To purge or regenerate the exhaust gas treating apparatus: the exhaust gas treating apparatus being a NOx trap or adsorbent
F01N 3/0814
By using absorbents or adsorbents: combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
F01N 3/0885
Using means for controlling, e.g. purging, the absorbents or adsorbents: regeneration of deteriorated absorbents or adsorbents, e.g.…
F02D 35/023
On interior conditions: by determining the cylinder pressure

METHOD FOR ADJUSTING THE AIR-FUEL RATIO IN THE EXHAUST GAS OF A DIRECT INJECTION INTERNAL COMBUSTION ENGINE FOR NOx STORAGE CATALYTIC CONVERTER REGENERATION

Life of this patent

METHOD FOR ADJUSTING THE AIR-FUEL RATIO IN THE EXHAUST GAS OF A DIRECT INJECTION INTERNAL COMBUSTION ENGINE FOR NOx STORAGE CATALYTIC CONVERTER REGENERATION

Life of this patent

Abstract

Claims16