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Characteristics of nano-scale particulates from gasoline turbo-intercooled gasoline direct-injection engine

Three-way catalytic converters are used to reduce the levels of tailpipe-out gaseous pollutants but their influence on engine out nano-scale particulate matter was not known. This collaborative work between Brookes, UCD, Dublin and Ferrari, Italy examined the influence of existing catalytic converters on nano-scale particulate matter and quantified its effect over the measurement range. The findings have been used by the company to calibrate a EURO VI gasoline engine with three-way catalytic converter. The outcomes will provide policy makers with a guideline regarding tolerance to be considered to account for nanoscale particulate matter measurement uncertainities when setting up test protocols.