The gasoline particulate filter (GPF) represents a durable solution for particulate emissions control in light-duty gasoline-fueled vehicles. It is also seen as a viable technology in North America to meet the upcoming US EPA tailpipe emission regulation, the proposed “Multipollutant Rule for Model Year 2027”.
The goal of this study was to track the evolution of tailpipe particulate emissions of a modern GTDI light duty vehicle under typical North American mileage accumulation; from a fresh state to 4000-mile, and finally to its full useful life of 150,000-miles. For this purpose, a production TWC + GPF after-treatment system was installed in place of the T3B85 TWC-only system. Chassis dyno emissions testing was performed at the pre-determined mileage points with on-road driving conducted for the necessary mileage accumulation.
This report will show the outstanding filtration durability and enhanced particulate control and of the current GPF technology all the way to 150,000 miles for the typical North American application. The report will also demonstrate that a coated CC2 GPF solution is an acceptable substitution for a flow through TWC catalyst for gaseous emissions performance, using an older 1st generation GPF washcoat technology without system optimization efforts. Noting that the investigation is an extension of previously reported results from the GPF performance from 0 to 4000-miles which characterized the early life evolution of tailpipe particulate emissions, specifically mass (PM) and number (PN).