This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Analysis of Diesel Soot Formation under Varied Ignition Lag with a Laser Light Extinction Method
Annotation ability available
Sector:
Language:
English
Abstract
Soot emission from diesel engines generally increases with shorter ignition lags. However, the detailed process and mechanism of this phenomenon has not been well understood. This investigation attempts to observe and analyze the in-chamber soot formation process at various ignition lags by high-speed photography of the direct flame images and laser shadowgraphs as well as the laser light extinction.
In the experiment, the separation of soot concentration from the soot-fuel mixture concentration was established by subtracting the laser light extinction intensity through a non-firing chamber from that through a firing chamber.
It was found that the soot concentration in the swirl chamber reached a maximum value immediately after the start of combustion, and then decreased rapidly. With shorter ignition lags, the maximum and final soot concentrations in the chamber increased. Photographic analysis showed that shorter ignition lags formed higher soot concentrations in flames, into which more fuel was directly injected.
Recommended Content
| Technical Paper | Characteristics of Diesel Soot Suppression with Soluble Fuel Additives |
| Technical Paper | DETR/SMMT/ CONCAWE Particle Research Programme: Heavy Duty Results |
| Technical Paper | Discriminating Tests for Automotive Engine Air Filters |
Authors
Topic
Citation
Miyamoto, N., Ogawa, H., Goto, N., and Sasaki, H., "Analysis of Diesel Soot Formation under Varied Ignition Lag with a Laser Light Extinction Method," SAE Technical Paper 900640, 1990, https://doi.org/10.4271/900640.Also In
References
- Otani, T. et.al. “Effects of Fuel Injection Pressure and Fuel Properties on Particulate Emissions from H.D.D.I. Diesel Engine” SAE Paper, No. 881255
- Saito, T. et.al. “Effects of Combustion Chamber Geometry on Diesel Combustion” SAE Paper, No. 861186
- Miyamoto, N. et.al. “Characteristics of Diesel Soot Suppression with Soluble Fuel Additives” SAE Paper, No. 871612
- Hardenberg, H.O. et.al “Experiences in the development of ceramic fiber coil particulate traps” SAE Paper, No. 870015
- Kontani, K. Gotoh, S. “Measurement of Soot in a Diesel Combustion Chamber by Light Extinction Method and In-Cylinder Observation by Highspeed Shadowgraphy” SAE Paper, No. 831291
- Dobbins, R.A. et.al. “Optical Scattering Cross Sections for Polydispessions of Dielectric Spheres” J. Opt. Soc. Amer. 56 10 1966 1351
- Kontani, K. Gotoh, S. “Effects of Particle Size Distribution on Soot Particle Measurement by Transmissive Light Extinction Method” SAE Paper, No. 861234
- Fujiwara, Y. Fukazawa, S. “Growth and combustion of Soot Particles in Exhaust of Diesel Engines” SAE Paper, No. 800984