European Regulatory Framework and Particulate Matter Emissions of Gasoline Light-Duty Vehicles: A Review
Open Access
- 4 July 2019
- Vol. 9 (7), 586
- https://doi.org/10.3390/catal9070586
Abstract
The particulate matter (PM) emissions of gasoline vehicles were much lower than those of diesel vehicles until the introduction of diesel particulate filters (DPFs) in the early 2000s. At the same time, gasoline direct injection (GDI) engines started to become popular in the market due to their improved efficiency over port fuel injection (PFI) ones. However, the PM mass and number emissions of GDI vehicles were higher than their PFI counterparts and diesel ones equipped with DPFs. Stringent PM mass levels and the introduction of particle number limits for GDI vehicles in the European Union (EU) resulted in significant PM reductions. The EU requirement to fulfill the proposed limits on the road resulted to the introduction of gasoline particulate filters (GPFs) in EU GDI models. This review summarizes the evolution of PM mass emissions from gasoline vehicles placed in the market from early 1990s until 2019 in different parts of the world. The analysis then extends to total and nonvolatile particle number emissions. Care is given to reveal the impact of ambient temperature on emission levels. The discussion tries to provide scientific input to the following policy-relevant questions. Whether particle number limits should be extended to gasoline PFI vehicles, whether the lower limit of 23 nm for particle number measurements should be decreased to 10 nm, and whether low ambient temperature tests for PM should be included.Keywords
This publication has 158 references indexed in Scilit:
- Physical and chemical characterization of SIDI engine particulatesCombustion and Flame, 2013
- Size-resolved engine exhaust aerosol characteristics in a metal foam particulate filter for GDI light-duty vehicleJournal of Aerosol Science, 2013
- Comparison of PM emissions from a gasoline direct injected (GDI) vehicle and a port fuel injected (PFI) vehicle measured by electrical low pressure impactor (ELPI) with two fuels: Gasoline and M15 methanol gasolineJournal of Aerosol Science, 2013
- Can Real-World Diesel Exhaust Particle Size Distribution be Reproduced in the Laboratory? A Critical Review Jorma KeskinenJournal of the Air & Waste Management Association, 2010
- Temperature Effects on Particulate Matter Emissions from Light-Duty, Gasoline-Powered Motor VehiclesEnvironmental Science & Technology, 2010
- Impact of Ambient Temperatures and Driving Conditions on the Chemical Composition of Particulate Matter Emissions from Non-Smoking Gasoline-Powered Motor VehiclesAerosol Science and Technology, 2008
- Combustion advancements in gasoline enginesEnergy Conversion and Management, 2007
- Comparability of particle emission measurements between vehicle testing laboratories: a long way to goMeasurement Science and Technology, 2004
- Twenty-five years after introduction of automotive catalysts: what next?Catalysis Today, 2000
- Automotive spark-ignited direct-injection gasoline enginesProgress in Energy and Combustion Science, 1999