The issue can only be addressed by limit values that are based on a particulate number count (ie PN count). One of the main findings is that the size of particles is a crucial factor behind the observed health effects. ![]() The EU commission also highlights ‘All this is set against recent conclusive evidence on the adverse ill effects of diesel exhaust emissions and especially about particulate matter (diesel soot). When proposing the new legislation, the European commission stated that ‘…engines contribute significantly to air pollution and are accountable for roughly 15% of the nitrogen oxide (NOx) and 5% of the particulate matter (PM) emissions in the EU…several technical reviews have concluded that the legislation in its current form has shortcomings’. Stage V, due to be implemented 2019-20, introduces a new requirement to reduce Particulate Number (PN) alongside continued control of PM and NOx. The evolution of emission standards for engines used within new non-road vehicles and equipment has introduced new challenges with each successive update. ![]() He explores the primary technology routes to achieving the required emissions. Here, Bob Laing, Product Development Manager at UK-based Eminox, looks at some key changes the soon to be introduced Stage V emissions requirements will drive.
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