Real time measurement of ultrafine and nano particles and significance of operating gears

This research paper focuses on characterization of ultrafine and nanoparticle emissions from diesel vehicle to investigate their physical characterization in terms of number and size as they are more vulnerable and responsible for toxicity,mutagenicity and carcinogenicity. an investigation has been carried out to identify the significance of different operating gears,clutch,declutch and gear change operations for their contributions to particle number(pn) on urban and extra urban part of the driving cycle. a bi-modal particle size distribution pattern was observed for both urban and extra urban parts where almost all the particles are below 200 nm and particle number peaks appear at 7 to 8 nm and at 70 nm. nano particles contribute approximately,70% of total particle number over urban part. experimental investigation shows that the most significant gear for their contribution to particle number are 3rd and 5th gears on urban and extra urban part of the driving cycle respectively. © school of engineering,taylor’s university.