The integration of catalysts, sensors and other auxiliaries in exhaust gas aftertreatment systems as well as the overall design of the aftertreatment system require a lot of care and thought. Not only do you need to take care of the environment or vehicle into which the system is intended to be installed. It is also necessary to ensure that performance is maximized and that all systems function accurately and as intended.
The development of aftertreatment systems is in Dinex highly simulation driven. That means, that the internal fluid dynamics, the exhaust gas flow through the system is carefully studied and directed through all parts of the system, in such a way that flow is evenly distributed over the catalysts and pressure drops are kept low. For SCR-systems, also the AdBlue injection is carefully modelled and studied, allowing us to investigate in detail, risk of urea deposition and ammonia distribution.
Sensor probes also need to be installed in a suitable position to measure accurately. The exhaust gas is typically hot; therefore, insulation and heatshields need to be considered to ensure that surface temperatures are reduced, thus eliminating the risk of damage to surrounding components, finally the structural integrity of the system needs to be ensured. All these aspects are simulated and tested using tools and methodologies honed over more than a decade.
Extensive CFD and engine dyno testing for NH3 distribution, pressure drop and deposit evaluation
Mature lifetime prediction using FEA with validation on inhouse shaker
With a self-critical view, the boundaries for performance are continuously pushed
