Continental shows technologies for compact, highly efficient exhaust aftertreatment at Agritechnica
Metallic catalyst substrates with customizable, easily integratable oval or even asymmetrical geometries allow the catalyst system to be mounted directly on the engine. Continental will also be displaying the ring catalyst, which makes it possible to achieve a highly integrated design in which the entire aftertreatment system, including the SCR injection system, is housed in a single box. These two strategies – direct mounting on the engine and use of a standardized box – not only ensure efficient emissions reduction but at the same time make it possible to cater to as many different vehicle applications as possible. In the agricultural and construction sectors, engines are fitted in a wide variety of vehicle types, and production volumes are usually small. For each of these applications, the aftertreatment system requires individual validation and certification. Cost savings are just one of many advantages if an aftertreatment system can be used across a wide range of applications.
“The more compact the aftertreatment system is, the more easily it can be integrated in multiple applications,” says Rolf Br?ck, head of the Catalytic Converters product line in Continental’s Fuel & Exhaust Management business unit. “Continental can offer all the necessary exhaust aftertreatment components for such solutions. And this means we are able to implement highly efficient Stage V systems for a wide range of applications.”
EU Stage V will set stricter limits on emissions of nitrogen oxides (NOx) and particulates from non-road machinery compared with the current US Tier 4 final/CARB and EU Stage IV standards. At the same time, new trends like the use of tractors in urban or construction applications mean that the aftertreatment system must function over a wider range of operating conditions. When a tractor is used for ploughing, its engine operates close to its design point, i.e. in the most efficient operating range. In an application such as urban snow removal on the other hand, the engine will not be running at much more than idling speed. Exhaust gas aftertreatment systems must therefore be designed to function reliably under a wide spectrum of operating conditions.