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A Study on the Injection Rate Observer of the Piezo-actuated and Solenoid-operated Injectors for CRDI Diesel Engines  

Sa, Jong-Seong (서일대학 자동차과)
Chung, Nam-Hoon (재단법인 송도테크노파크 부품개발실)
SunWoo, Myoung-Ho (한양대학교 자동차공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.24, no.9, 2007 , pp. 52-59 More about this Journal
Abstract
Fuel injection system greatly affects the performance of a direct injection diesel engine. A common rail injection system was introduced to satisfy the stringent emission standards, low fuel consumption, and low noise in recent years. The performance of a common-rail fuel injection system is strongly influenced by the injector characteristics. The common rail injector has evolved in order to improve its injection performance. The piezo-actuated injector is more suitable for common rail injection system due to its fast response and is expected to replace current solenoid-operated injector. In this study, nonlinear mathematical models are proposed for the solenoid-operated and the piezo-actuated injectors for control applications. Based on these models, the injection rate, which is one of the most important factors for the injection characteristics, is estimated using sliding mode observer. The simulation results and the experimental data show that the proposed sliding mode observers can effectively estimate the injection timing and the injection rate for both common-rail injectors.
Keywords
Injector model; Injection rate; Solenoid-operated injector; Piezo-actuated injector; Sliding mode observer;
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  • Reference
1 Guerrassi, N. and Dupraz, P., 'A common rail injection system for high speed direct injection diesel engines,' SAE Paper 980803, 1998
2 Hountalas, T. and Kouremenos, D., 'Development of a fast and simple simulation model for the fuel injection system of diesel engines,' Advances in Engineering Software, Vol. 29, No. 1, pp. 13-28, 1998   DOI   ScienceOn
3 Adriaens, H. J. M. T. S., de Koning, W. L. and Banning, R., 'Modeling Piezoelectric Actuators,' IEEE/ASME Trans. on Mechatronics, Vol. 5, Issue 4, pp. 331-341, 2000   DOI   ScienceOn
4 ANSI/IEEE Standard 176-1987, 'An American National Standard: IEEE Standard on Piezoelectricity,' ANSI/IEEE Standard 176-1987, 1987
5 Slotine, J. E., Hedrick, J. K. and Misawa, E. A., 'On Sliding Observer for Nonlinear Systems,' Trans. AS ME, Journal of Dynamic Systems, Measurement, and Control, Vol. 109, No.3, pp. 245252, 1987   DOI
6 Streeter, V. L. and Wylie, E. B., 'Fluid Mechanics,' McGraw-Hili, 1979
7 Baranowski, D., Klugl, W. and Schoppe, D., 'Simulation and Design Optimization of a Common Rail Piezo Injector for Passenger Car DI Diesel Engines,' Fuel Injection Systems, pp. 219-232, 1999
8 Nam, K., Park, S. and Sunwoo, M., 'Dynamic Model of an HSDI Common-rail Injector and Injection Rate Estimation,' Transactions of KSAE, Vol.11, No.5, pp. 43-49,2003
9 Nam, K., Yoon, M., Park, S. and Sunwoo, M., 'Development of a Sensorless Estimation Algorithm of the Injection Timing and Rate for an HSDI Common-Rail Injector,' JSME International Journal Series C, Vol. 47, No.3, pp. 882-888, 2004   DOI   ScienceOn
10 Misawa, E. A. and Hedrick, J. K., 'Nonlinear Observers - A State-of-the-Art Survey,' Trans. ASME, Journal of Dynamic Systems, Measurement, and Control, Vol.111, No.3, pp. 344-351, 1989   DOI
11 Jalili, N., Wagner, J. and Dadfarnia, M., 'A Piezoelectric Driven Ratchet Actuator Mechanism with Application to Automotive Engine Valves,' Mechatronics, Vol. 13, No.8, pp. 933-956, 2003   DOI   ScienceOn
12 Stumpp, G and Ricco, M., 'Common rail - an attractive fuel injection system for passenger car DI diesel engines,' SAE Paper 960870, 1996
13 Boehner, W. and Hummel, K., 'Common rail injection system for commercial diesel vehicles,' SAE Paper 970345, 1997