This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Study on Mixture Formation and Ignition Process in Spark Ignition Engine Using Optical Combustion Sensor
Annotation ability available
Sector:
Language:
English
Abstract
Mixture formation and the ignition process in 4 cycle 4 cylinder spark ignition engines were investigated, using an optical combustion sensor that combines fiber optics with a conventional spark plug. The sensor consists of a 1-mm diameter quartz glass optical fiber cable inserted through the center of a spark plug. The tip of the fiber is machined into a convex shape to provide a 120-degree view of the combustion chamber interior.
Light emitted by the spark discharge between spark electrodes and the combustion flames in the cylinder is transmitted by the optical cable to an opto-electric transducer. As a result, the ignition and combustion process which depends on the mixture formation can be easily monitored without installing transparent pistons and cylinders. This sensor can give more accurate information on mixture formation in the cylinders. It can monitor cycle-by-cycle, the air-fuel ratio of the mixture near the spark plug by detecting the light intensity of CH and C2 radicals appearing after the spark discharge. Also, it can provide information on fuel film or droplets in the cylinder which cause a diffusion flame, by detecting the light intensity at long wavelengths. This sensor can directly detect cycle-by-cycle, the intensity of a spark discharge by monitoring light emitted by the spark discharge, which precedes combustion flames. The combustion process can be throughly monitored from spark discharge to the end of combustion.
Recommended Content
Authors
Topic
Citation
Ohyama, Y., Ohsuga, M., and Kuroiwa, H., "Study on Mixture Formation and Ignition Process in Spark Ignition Engine Using Optical Combustion Sensor," SAE Technical Paper 901712, 1990, https://doi.org/10.4271/901712.Also In
References
- Sasayama T. et al. Recent developments of optical fiber sensors for automotive use Fiber and Integrated Optics 7 255 271 1988
- Sasayama T. et al. Recent developments of optical fiber sensors for automotive use SPIE 840 37 47 1987
- Remboski D.J. et al. Optical sensors for combustion analysis and control Automotive Engineering 97 6 1989
- Mallog J. Klüting M. MTZ 50 6 1989
- Day E. et al. Start of combustion sensor SAE Paper 890484 1989
- Nutton D. Pinnock R.A. Closed loop ignition and fueling control using optical combustion sensors SAE Paper 900486 1990
- Yamazaki M. Detection of air-excess ratio of burners by flame spectra Transactions of Chemical Engineering 14 6 1988
- Mizutani Y. Visualzation of the flame reaction zones of a flame by image processing Transactions of Japan Society of Mechanical Engineers 54 504 1988
- Witze P.O. Fiber-optic instrumented spark plug for measuring early flame development in spark ignition engines SAE Paper 881638 1988