发明授权
US07900441B2 Precat-NOx adsorber exhaust aftertreatment system for internal combustion engines
有权
用于内燃机的前驱NOx吸附器排气后处理系统
- 专利标题: Precat-NOx adsorber exhaust aftertreatment system for internal combustion engines
- 专利标题(中): 用于内燃机的前驱NOx吸附器排气后处理系统
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申请号: US10778651申请日: 2004-02-12
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公开(公告)号: US07900441B2公开(公告)日: 2011-03-08
- 发明人: Rahul Mital , Bradlee J. Stroia , Shyancherng C. Huang , Robert C. Yu
- 申请人: Rahul Mital , Bradlee J. Stroia , Shyancherng C. Huang , Robert C. Yu
- 申请人地址: US TN Nashville
- 专利权人: Fleetguard, Inc.
- 当前专利权人: Fleetguard, Inc.
- 当前专利权人地址: US TN Nashville
- 代理机构: Krieg DeVault LLP
- 代理商 J. Bruce Schelkopf, Esq.
- 主分类号: F01N3/00
- IPC分类号: F01N3/00
摘要:
The invention provides a NOx adsorber aftertreatment system for internal combustion engines which utilizes at least one precat operatively coupled to at least one NOx adsorber to aid in the regeneration of the NOx adsorber. Fuel is injected into a precat located upstream of a NOx absorber producing heat, H2O, and reductants such as CO, HC, and volatile hydrocarbons, which are input into the NOx absorber. The combination of heat, water, and reductants help to efficiently regenerate the NOx Adsorber which in turn releases exhausts products such as CO2 and N2. Regeneration of a NOx adsorber can be performed during periods of reduced exhaust gas flow lowering the fuel penalty associated with NOx adsorber regeneration. The pre-cat, NOx adsorber regenerating aftertreatment system of the present invention may be used with any suitable control system.