Institution of Mechanical Engineers
S491/002/98
Effect of Ashless Additive Technologies on the Number and Size Distribution of Fine Particles Emitted from Diesel Engines S. H. Ahmed Bsc, PhD, MBFRC
S. O. Hayat Bsc, PhD, MIMechE
ChemEcol(UK) Limited, UK
SYNOPSIS
The Scanning Mobility Particle Sizer was used in a comparative study of two diesel fuels, (a) low sulphur EN 590 diesel and (b) ultra low sulphur 'city diesel' and several ashless additive technologies to determine their effect on fine particle emissions from a heavy duty single cylinder and a light duty multi-cylinder engine. The two fuels provided significantly different particle number emissions but similar size distributions. An additive formulation containing a non metallic ashless combustion enhancer provided significant reductions of between 45% and 85% in particle number emissions in both the test fuels with no shift in the particle size distribution. The multifunctional additive package containing a dispersant and a lubricity agent did not significantly alter the number of particles emitted or the particle size distribution.
| Paper No.
S491/002/98, IMechE Seminar Publication: Diesel Engines - Particulate Control 23 November 1998 IMechE Headquarters, London, UK |
Effect of Ashless Additive Technologies on the Number and Size Distribution of Fine Particles Emitted from Diesel Engines S. H. Ahmed Bsc, PhD, MBFRC
S. O. Hayat Bsc, PhD, MIMechE
ChemEcol(UK) Limited, UK
SYNOPSIS
The Scanning Mobility Particle Sizer was used in a comparative study of two diesel fuels, (a) low sulphur EN 590 diesel and (b) ultra low sulphur 'city diesel' and several ashless additive technologies to determine their effect on fine particle emissions from a heavy duty single cylinder and a light duty multi-cylinder engine. The two fuels provided significantly different particle number emissions but similar size distributions. An additive formulation containing a non metallic ashless combustion enhancer provided significant reductions of between 45% and 85% in particle number emissions in both the test fuels with no shift in the particle size distribution. The multifunctional additive package containing a dispersant and a lubricity agent did not significantly alter the number of particles emitted or the particle size distribution.