公开(公告)号：WO2013149782A1

公开(公告)日：2013-10-10

申请号：PCT/EP2013/054458

申请日：2013-03-06

Applicant: DELPHI TECHNOLOGIES HOLDING S.À.R.L.

Inventor： SCHMITT, Julien ,  MICHEL, Eric

IPC: F02D41/00 ,  F02D41/02 ,  F02D41/18 ,  F02D41/40 ,  F01N3/08 ,  F02D41/14

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 (Q 2 ) required to reach a relatively rich target exhaust air fuel ratio (AFR rich ) on the basis of a measured air flow; determining a heating-contributing fuel value (ηQ 2 ) required to reach or maintain a target desulfation temperature in said NOx adsorber by way of an exothermal reaction; calculating a target air flow ( Air tgt ) corresponding to the air flow required for a substantially stoichio-metric combustion of a torque-contributing main fuel quantity (Q 1 ) together with said heating-contributing fuel value (ηQ 2 ); and causing the engine to inject said post fuel amount (Q 2 ) and said main fuel quantity (Q 1 ) while controlling the air flow to meet said target air flow ( Air tgt ).

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：基于以下方式确定达到较高目标排气空燃比（AFR浓度）所需的后燃料量（Q2） 测量气流; 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（etaQ2）; 计算与所述加力贡献燃料值（etaQ2）一起对应于扭矩贡献主燃料量（Q1）的基本上数量级燃烧所需的空气流量的目标空气流量（空气流量）; 并且在控制空气流以满足所述目标空气流（Air tgt）的同时使发动机喷射所述后燃料量（Q2）和所述主燃料量（Q1）。