Size-resolved engine exhaust aerosol characteristics in a metal foam particulate filter for GDI light-duty vehicle

Kwanhee Choi, Juwon Kim, Ahyun Ko, Cha Lee Myung, Simsoo Park, Jeongmin Lee

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The particulate emissions generated from a side-mounted 2.4L gasoline direct injection (GDI) engine were evaluated using a metal foam-type gasoline particulate filter (GPF), placed on the downstream of a three-way catalyst. An ULEV legislation-compliant light-duty vehicle was tested under the new European driving cycle (NEDC) and at constant-speed driving conditions. Particle number (PN) concentrations, particulate size distribution and the filtration efficiency of the GPF were evaluated with the condensation particle counter (CPC) and the differential mobility spectrometer (DMS). The PN emissions for the entire NEDC were 1.17E+12N/km for the base GDI vehicle and 4.99E+11N/km for the GPF-equipped GDI vehicle, and the filtration efficiency of the GPF was 57%. In particular, the number of sub-23nm particles formed in the GDI vehicle was substantially reduced, with 97% efficiency. The pressure drop in the metal foam-type GPF was constrained to be below 1.0kPa at a 120km/h vehicle speed, and as a result, the fuel economy and the CO2 emission for the GPF-applied vehicle were equivalent to those for the base vehicle.

Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalJournal of Aerosol Science
Volume57
DOIs
Publication statusPublished - 2013 Mar

Keywords

  • Gasoline direct injection
  • Gasoline particulate filter
  • Metal foam
  • Particle number concentration
  • Particle size distribution
  • Particulate matter

ASJC Scopus subject areas

  • Environmental Engineering
  • Pollution
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Atmospheric Science

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