Emission Control Science and Technology

, Volume 4, Issue 4, pp 219–239 | Cite as

Gasoline Particulate Filters—a Review

  • Ameya JoshiEmail author
  • Timothy V. Johnson


To improve ambient air quality, several countries have adopted regulations setting stringent limits on vehicular tailpipe emissions of particulates. The issue of high particulate emissions has been mostly addressed for diesel vehicles with the widespread adoption of diesel particulate filters (DPFs). Attention is now turned to gasoline direct injection (GDI) technology, which provides improved fuel economy and performance, but also increased particulate emissions, as compared to the port fuel injection (PFI) engines. Europe has set a particle number (PN) limit on emissions from GDI vehicles, while China has expanded that to include all gasoline vehicles. In the USA, these are regulated through particle mass (PM) limits. To meet these regulations, it is anticipated that gasoline particulate filters (GPFs) will be widely applied to gasoline exhaust after-treatment. GPF technology has rapidly advanced, and already a wide range of pore size distribution and cell geometries are being offered to minimize back pressure and offer high ash storage capacity, high filtration efficiency, and, in the case of filters combined with three-way catalytic functionality, high conversion of gas-phase criteria pollutants. This review summarizes representative studies on particulate emissions from gasoline engines, the nature of the particulates, and the advances in GPF technology.


Gasoline particulate filters GPF GDI Particulates Euro 6, China 6 


Compliance with Ethical Standards

The authors declare that they have no competing interests.


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© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Corning IncorporatedCorningUSA

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