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Comparison of Pilot Spray Characteristics of HP Diesel Injectors with Different Driving Method for CRDi System (I)  

Lee, Jin-Wook (숭실대학교 기계공학과)
Publication Information
Journal of ILASS-Korea / v.15, no.1, 2010 , pp. 25-30 More about this Journal
Abstract
The capability of pilot injection with small fuel quantity at all engine operating conditions is one of the main feature of the common rail direct injection system. The purpose of the pilot injection is to lower the engine noise and to reduce the NOx emissions. This study describes the pilot spray structure characteristics of the common-rail diesel injectors with different electric driving characteristics, including solenoid-driven and piezo-driven type. Namely three common-rail injectors with different electric current wave were investigated in this study. The pilot spray characteristics such as spray speed, spray tip penetration, and spray angle were obtained by spray images, which is measured by the back diffusion light illumination method with optical system for high-speed temporal photography. As this research results, it was found that pilot injection of common-rail system was effected by rate of injection with different electrical characteristic for driving the injector.
Keywords
Common-rail System; Pilot Spray; Solenoid-driven Injector; Piezo-driven Injector;
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  • Reference
1 C. Arcoumanis, M. Gavaises and B. French, "Effect of Fuel Injection Processes on the Structure of Diesel Sprays", SAE Paper No. 970799, 1997.
2 M. Badami, P. Nuccio and G. Trucco, "Influence of Injection Pressure on the Performance of a DI Diesel Engine with a Common Rail Fuel Injection System", SAE Paper No. 1999-01-0193, 1999.
3 K. Morita, "Automotive Power Source in 21st Century", JSAE Review, Vol. 24, 2003, pp. 3-7.   DOI   ScienceOn
4 P. Walzer, "Future Power Plants for Cars", SAE paper No. 2001-01-3192, 2001.
5 S. P. Edwards, A. D. Pilley, S. Michon and G. Fournier, "The Optimization of Common Rail FIE Equipped Engines Through the Use of Statistical Experimental Design, Mathematical Modelling and Genetic Algorithms", SAE 970346, 1997.
6 C. Fetters, and A. Leipertz, "Potential of a Piezo-Driven Passenger Car Common-Rail System to Meet Future Emission Legislation-An Evaluation by Means of In- Cylinder Analysis of Injection and Combustion", SAE 2000-01-3499, 2001.
7 H. Hiroyasu and M. Arai, "Structure of Fuel Sprays in Diesel Engines", SAE Paper No. 900475, 1990.