发明名称 |
Method of detecting nitrogen compounds contained in exhaust gases, notably of internal-combustion engines |
摘要 |
A method of detecting nitrogen compound emissions in exhaust gases treated with selective catalytic reduction achieved by injecting a reducing agent into the gases and by passing these gases through a catalyst include sending the signal collected by a gas detector arranged in the exhaust gas downstream from the catalyst and representative of the amount of NOx (NOxsonde) at the catalyst outlet to a computing unit, decomposing this signal into a value representative of the effective NOx amount (NOxréel) at the outlet of catalyst established by the SCR catalyst model, into a detector perturbation coefficient (k) and into a value representative of the ammonia amount (NH3réel) via an integrated model so as to obtain NOxsonde=NOxréel+k.NH3réel, evaluating coefficient (k) from this decomposition, and determining the presence of nitrogen compounds downstream from the catalyst when coefficient (k) is greater than or equal to 1. |
申请公布号 |
US9395272(B2) |
申请公布日期 |
2016.07.19 |
申请号 |
US201313940289 |
申请日期 |
2013.07.12 |
申请人 |
IFP ENERGIES NOUVELLES |
发明人 |
Frobert Arnaud |
分类号 |
G01N15/00;G01N31/22;G01N31/00;G01M15/10;F01N3/20;F01N11/00 |
主分类号 |
G01N15/00 |
代理机构 |
Fitch, Even, Tabin & Flannery LLP |
代理人 |
Fitch, Even, Tabin & Flannery LLP |
主权项 |
1. A method of detecting nitrogen compound emissions in exhaust gases treated with selective catalytic reduction achieved by injecting a reducing agent into the gases and by passing these gases through a catalyst, characterized in that the method consists in:
sending to a computing unit the signal collected by a gas detector arranged in the exhaust gas downstream from the catalyst and representative of the amount of NOx (NOxsonde) at the catalyst outlet, decomposing this signal into a value representative of the effective NOx amount (NOxréel) at the outlet of the catalyst established by the SCR catalyst model, into a detector perturbation coefficient (k) and into a value representative of the ammonia amount (NH3réel) via an integrated model so as to obtain NOxsonde=NOxréel+k.NH3réel, evaluating coefficient (k) from this decomposition, determining the presence of nitrogen compounds downstream from the catalyst when coefficient (k) is greater than or equal to 1. |
地址 |
Rueil-Malmaison FR |