Nanoparticle Emissions of DI Gasoline Cars with/without GPF

Abstract

<div class="section abstract"><div class="htmlview paragraph">In the present paper some results of investigations of nanoparticles from five DI gasoline cars are represented. The measurements were performed at vehicle tailpipe and in CVS-tunnel. Moreover, five variants of “vehicle - GPF” were investigated. These results originate from the project GasOMeP (<u>Gas</u>oline <u>O</u>rganic & <u>Me</u>tal Particulates), which focused on metal-nanoparticles (including sub 20nm) from gasoline cars with different engine technologies.</div><div class="htmlview paragraph">The PN-emission level of the investigated GDI cars in WLTC without GPF is in the same range of magnitude very near to the actual limit value of 6.0 × 10<sup>12</sup> #/km. With the GPF’s with better filtration quality, it is possible to lower the emissions below the future limit value of 6.0 × 10<sup>11</sup> #/km.</div><div class="htmlview paragraph">There is no visible nuclei mode and the ultrafine particle concentrations below 10mm are insignificant.</div><div class="htmlview paragraph">Some of the vehicles show at constant speed operation a periodical fluctuation of the NP-emissions, as an effect of the electronic control.</div></div>