Browse Publications Technical Papers 2013-01-0839

The Effect of a Particle Oxidation Catalyst (POC ® ) on Particle Emissions of a GDI Car during Transient Engine Operation 2013-01-0839

Particle emissions have been generally associated to diesel engines. However, spark-ignition direct injection (SI-DI) engines have been observed to produce notable amounts of particulate matter as well. The upcoming Euro 6 legislation for passenger cars (effective in 2014, stricter limit in 2017) will further limit the particulate emissions from SI engines by introducing a particle number emission (PN) limit, and it is not probable that the SI-DI engines are able to meet this limit without resorting to additional aftertreatment systems.
In this study, the solid particle emissions of a SI-DI passenger car with and without an installed Particle Oxidation Catalyst (POC®) were studied over the New European Driving Cycle (NEDC) on a chassis dynamometer and over real transient acceleration situations on road. It was observed that a considerable portion of particle number emissions occurred during the transient acceleration phases of the cycle. The application of the POC resulted in a reduction of those emission peaks and, as a conclusion, the car was able to meet the 2017 Euro 6 particle number emission limit with the POC.
The on-road measurement confirms the results obtained on the chassis dynamometer in that the majority of particle number emissions associated with SI-DI engines arise from transient acceleration situations. The POC efficiency was verified also on road by significantly reducing the particle number emission peaks caused during accelerations.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Development of Highly Efficient Lean NOx Catalyst System in Low Exhaust Gas Temperature


View Details


A Development of Urea Solution Injection Quantity Decision Logic for SCR System


View Details


Soot Loading Estimation Accuracy Improvement by Filtration Layer Forming on DPF and New Algorithm of Pressure Loss Measurement


View Details