Exhaust-gas aftertreatment for mobile machinery

It's not only road traffic that's responsible for pollutant emissions: diesel engines used in industrial trucks, diggers and other industrial applications also pollute the atmosphere.

Solutions for retrofitting

In order to cut the pollutant emissions of mobile machinery, HJS offers modular diesel particulate filter systems specifically for these applications. The economical and environmentally sound solutions have proven themselves many times over, and are certified in Switzerland under the so-called VERT list.

EU-Nonroad-Directive

Solutions for OEMs

European and US emissions legislation for non-road mobile machinery as well as stationary applications will require the introduction of exhaust gas treatment systems by 2011 at the latest. The relevant particulate reduction technologies and systems for reducing nitrogen oxide (NOx) emissions and from 2013 onwards as a combination of both technologies must, however, still remain fully controllable despite their complexity.

Wherever these systems are employed in Europe and the US, challenging legal and other relevant requirements with respect to modularity, installation dimensions, service and maintenance have to be taken into account. Many machinery and engine manufacturers agree, that the only way they will be able to tackle these technical challenges associated with these requirements in an effective and efficient manner is by working together.

Technologies intelligently linked

The strict particulate limit of 0.025 g/kWh, that will come into force in 2011, can already be met today with the aid of DPF^® systems (Diesel Particulate Filter). The legal requirements for nitrogen oxides are in turn achieved when an SCR system (Selective Catalytic Reduction) is installed.

HJS filters reduce particulate emissions effectively – by more than 99%. Different systems can be applied to regenerate the filter depending on the application and customers' wishes. These range from a purely passive regeneration strategy through autonomous systems that use an additive to an active, 2-stage, burner-aided regeneration system. Nitrogen oxide emissions can likewise be reduced by up to 90% with the use of an HJS SCR denox system.

As of January 2014 (Stage IV), the legal requirements are so stringent that the emissions limits will in the majority of cases only be able to be achieved using a combined SCRT^® system (Selective Catalytic Reduction Technology). The technology combines a particulate filter and a denox unit and comes equipped with its own exhaust gas control unit that enables autonomous operation.