An advanced controller for a urea SCR (Selective Catalytic Reduction) catalytic converter system for a mobile heavy-duty diesel engine is presented. The after-treatment system is composed of the injecting device for urea solution and a single SCR catalytic converter. The control strategy consists of three parts: A primary feedforward controller, a surface coverage observer, and a feedback controller. A nitrogen oxide (NOx) gas sensor with non-negligible cross-sensitivity to ammonia (NH3) is used for a good feedback control performance. The control strategy is validated with ESC and ETC cycles: While the average NH3 slip is kept below 10 ppm, the emission of NOx is reduced by 82%.
Control of a Urea SCR Catalytic Converter System for a Mobile Heavy Duty Diesel Engine
Sae Technical Papers
SAE 2003 World Congress & Exhibition ; 2003
2003-03-03
Conference paper
English
Control of a urea SCR catalytic converter system for a mobile heavy duty diesel engine
Automotive engineering | 2003
|2003-01-0776 Control of a Urea SCR Catalytic Converter System for a Mobile Heavy Duty Diesel Engine
British Library Conference Proceedings | 2003
|Deactivation of Urea SCR Catalyst for Heavy Duty Diesel Engine
SAE Technical Papers | 2012
|Oxidation Catalytic Converter and Emulsified Fuel Effects on Heavy-Duty Diesel Engine Emissions
British Library Conference Proceedings | 2002
|Oxidation Catalytic Converter and Emulsified Fuel Effects on Heavy-Duty Diesel Engine Emissions
SAE Technical Papers | 2002
|