公开(公告)号：US09429088B2

公开(公告)日：2016-08-30

申请号：US14390407

申请日：2013-03-06

Applicant: DELPHI INTERNATIONAL OPERATIONS LUXEMBOURG S.A.R.L.

Inventor： Julien Schmitt ,  Eric L. P. Michel

IPC: F01N3/18 ,  F02D41/02 ,  F01N3/08 ,  F02D41/14 ,  F02D41/18 ,  F02D41/40 ,  F02D41/00 ,  F01N3/10 ,  F01N13/00 ,  F01N3/20 ,  F01N11/00

CPC classification number: F02D41/0235 ,  F01N3/0814 ,  F01N3/0885 ,  F01N3/106 ,  F01N3/206 ,  F01N11/00 ,  F01N13/009 ,  F01N2610/00 ,  F01N2900/1404 ,  F02D41/0002 ,  F02D41/0007 ,  F02D41/0055 ,  F02D41/025 ,  F02D41/028 ,  F02D41/1446 ,  F02D41/18 ,  F02D41/405 ,  F02D2200/70 ,  F02D2250/18 ,  F02D2250/32 ,  Y02T10/144 ,  Y02T10/24 ,  Y02T10/26 ,  Y02T10/42 ,  Y02T10/44 ,  Y02T10/47

Abstract: A process for desulfation of a NOx adsorber in a diesel internal combustion engine exhaust system is disclosed, which comprises: determining an amount of post fuel (Q2) required to reach a relatively rich target exhaust air fuel ratio (AFRrich) on the basis of a measured air flow; determining a heating-contributing fuel value (ηQ2) required to reach or maintain a target desulfation temperature in said NOx adsorber by way of an exothermal reaction; calculating a target air flow (Airtgt) corresponding to the air flow required for a substantially stoichiometric combustion of a torque-contributing main fuel quantity (Q1) together with said heating-contributing fuel value (ηQ2); and causing the engine to inject said post fuel amount (Q2) and said main fuel quantity (Q1) while controlling the air flow to meet said target air flow (Airtgt).

Abstract translation: 公开了一种用于柴油机内燃机排气系统中的NOx吸附器脱硫的方法，其包括：基于以下步骤确定达到相对较高的目标排气空燃比（AFRrich）所需的后燃料量（Q2） 测量空气流量; 确定通过放热反应达到或维持所述NOx吸附器中的目标脱硫温度所需的加热贡献燃料值（ηQ2）; 计算与所述加力贡献燃料值（ηQ2）一起对应于转矩贡献主燃料量（Q1）的基本上化学计量燃烧所需的空气流量的目标空气流量（Airtgt）; 并且在控制空气流以满足所述目标空气流（Airtgt）的同时使发动机喷射所述后燃料量（Q2）和所述主燃料量（Q1）。