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3 things you need to know about Stage V emissions standards

Posted by Geoff Haines on 19-May-2016 18:00:00
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Stage V emissions standardsDeveloping a new engine is complicated enough without having to deal with meeting regulations for carbon emissions. For many businesses, it’s going to get tougher. 

As the European Commission continue to clamp down on environmentally unfriendly technologies, many organisations producing engines for new non-road vehicles will face new challenges with the introduction of Stage V emissions standards in 2019-2020. 

The new Stage V emissions standards reflect an evolution of Stage IV, but will bring with it new challenges in the integration of after-treatment systems and meeting particulate matter count.

So we’ve outlined 3 things that you need to know about Stage V emissions standards and how these changes might affect you. 

1) Tougher standards for more engine types

The Stage V emissions standards will bring much more stringent regulations for a wider scope of engines. For example, compression ignition engines below 19kW and all engines above 560kW.

However, this will lead to challenges specific for both the smaller and larger engine types, i.e. low temperature drive cycle issues for smaller engines.

2) DPF in the after-treatment system

Stage V emissions standards will make the use of diesel particulate filters (DPF) in the after-treatment system obligatory.

The new legislation will introduce a revised particulate mass limit as well as a particulate number count for diesel engines between 19kW and 560kW, meaning a DPF filter is essential to ensure compliance with the Stage V emissions standards.

3) After-treatment systems for smaller engines 

The introduction of the new Stage V emissions standards will have a large impact on the after-treatment systems of smaller engines, particularly those under 56kW.

In these cases, it’s more likely that the DOC/DPF solutions used by OEMs on much larger engines will be the solution implemented for engines under 56kW. 

Yet, there still exists the issue concerning the strategy of DPF regeneration. Specifically, the trade-off between population risk and system costs needs to be considered in this particular power range.

Overall, the attempts by the European Commission to reduce air pollution poses new challenges for engine manufacturers in the form of Stage V emissions standards. Many manufacturers can use their knowledge and experience with on-road developments to ensure off-road engine developments work efficiently. Still, significant time and effort will be required to ensure new engines are produced that meet the legislation, particularly for those manufacturers with little experience of after-treatment.

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