This work aimed to study nano-scale particulate matter originating from gasoline direct injection engine during cold start and warm up operating conditions and to identify the role of the three-way catalytic converter on nano-scale particulate during cold-start and warm-up operating conditions. This work used a 4-stroke, 1.6 litre, wall guided gasoline direct injected, turbocharged and intercooled SI engine equipped with a three-way catalytic converter for this investigation. It used a fast particle spectrometer for the measurement of exhaust nano-scale particles upto 1000 nm diameter. This work identified that about 98% of the particles during cold-start are in the size range below 25 nm diameter; the particle count during cold-start measured upstream of the catalytic converter is three orders of magnitude higher than the downstream measurement; the difference observed for the particles in the size range 5-25 nanometer diameter seems to follow the trend of the conversion characteristics of CO in the catalytic converter during the warm-up period at low load and low speed engine operating conditions.
Particulate Matter Emissions and the Role of Catalytic Converter During Cold Start of GDI Engine
Sae Technical Papers
SAE 2010 Powertrains Fuels & Lubricants Meeting ; 2010
25.10.2010
Aufsatz (Konferenz)
Englisch
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