Euro 6 emissions challenges

摘要

The latest fast-response gas analysis technology could be a useful tool for those preparing for changes in emissions legislation. From 2014, current proposals for Euro 6 would apply limits on particle number (N/km) emissions for both gasoline direct injection and diesel light-duty vehicles, and reduced diesel NOx limits. In the case of diesel vehicles, compliance with the particle number limits is exclusively via fitting diesel particulate filters. Particularly in the case of gasoline direct injection (GDI) engines, Cambustion's DMS500 fast-response particulate analyzer offers crucial insights and assistance with particle emissions compliance. The reduced NOx limits that apply to diesel vehicles are likely to require some form of aftertreatment such as selective catalytic reduction (SCR). The highly variable nature of engine-out NOx poses some difficult control problems in urea dosing.