Effect of the mixture preparation on the nanoparticle characteristics of gasoline direct-injection vehicles
- 18 May 2012
- journal article
- Published by SAGE Publications in Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
- Vol. 226 (11), 1514-1524
- https://doi.org/10.1177/0954407012445534
Abstract
Time-resolved nanoparticle number concentrations and size distribution characteristics were investigated in gasoline direct-injection vehicles, according to fuel preparation methods. Particle number emissions were measured using the golden particle measurement system recommended by the Particle Measurement Programme, and the particle size spectrum was determined using a DMS500 spectrometer installed at the tailpipe of the vehicles. The wall-guided gasoline direct-injection vehicle exhibited the most temperature-dependent nanoparticulate matter exhaust characteristics, owing to direct accumulation of fuel on the piston head and cylinder liner and a high concentration of accumulation mode particles. The air-guided gasoline direct-injection vehicle emitted particle emissions mostly during cold transient driving conditions and high acceleration, which had a weak trimodal characteristic with evenly distributed nucleation and accumulation mode particles. The spray-guided gasoline direct-injection vehicle continuously discharged 105 particles/cm3 during constant-speed driving segments, because of the ultra-lean-burn operation and bulk quenching; particulate matter from the spray-guided gasoline direct-injection vehicle demonstrated a strong bimodal characteristic, spreading over 10–100 nm. The particle number emissions for the gasoline direct-injection vehicles for the New European Driving Cycle test mode were 1.48 × 1012 particles/km, 6.03 × 1011 particles/km and 3.17 × 1012 particles/km for the wall-guided type, the air-guided type and the spray-guided type respectively, and none of these were able to satisfy the proposed particle number regulations for the Euro 6 standard. For gasoline direct-injection vehicles, it should be considered that engine hardware modifications, as well as energy management system calibrations and even the application of the particle filter, may be needed to meet the upcoming particulate matter number regulation.Keywords
This publication has 15 references indexed in Scilit:
- Comparative study of engine control strategies for particulate emissions from direct injection light-duty vehicle fueled with gasoline and liquid phase liquefied petroleum gas (LPG)Fuel, 2012
- Exhaust nanoparticle emissions from internal combustion engines: A reviewInternational Journal of Automotive Technology, 2011
- Effect of a 2-stage injection strategy on the combustion and flame characteristics in a PCCI engineInternational Journal of Automotive Technology, 2011
- Effects of injection parameters on the spray characteristics of swirl and slit injectors using the Mie-scattering methodInternational Journal of Automotive Technology, 2010
- Time-resolved particle emission and size distribution characteristics during dynamic engine operation conditions with ethanol-blended fuelsFuel, 2009
- Effects of intake flow on the spray structure of a multi-hole injector in a DISI engineInternational Journal of Automotive Technology, 2009
- Experimental investigation into particulate size and number distribution from a spark ignition engine: In-cylinder combustion and transient eventsProceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2008
- Automotive spark-ignited direct-injection gasoline enginesProgress in Energy and Combustion Science, 1999
- Mechanisms of Particulate Matter Formation in Spark-Ignition Engines. 1. Effect of Engine Operating ConditionsEnvironmental Science & Technology, 1999
- Engines and nanoparticles: a reviewJournal of Aerosol Science, 1998