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http://dx.doi.org/10.3795/KSME-A.2013.37.8.991

Study of Improvement in Fatigue Life of Fuel Injection Pipe of Common Rail System  

Song, Se Arm (Dept. of Creative Engineering System, Pusan Nat'l Univ.)
Bae, Jun Ho (Research Institute of Mechanical Technology, Pusan Nat'l Univ.)
Jung, Sung Yuen (Research Institute of Mechanical Technology, Pusan Nat'l Univ.)
Kim, Chul (Research Institute of Mechanical Technology, Pusan Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.8, 2013 , pp. 991-998 More about this Journal
Abstract
The fuel injection pipe of a common rail system used in a clean diesel vehicle plays a role in supplying fuel from a rail to the injector of each cylinder connecting the engine under a repeated internal pressure. The fuel injection pressure is increased to over 200 MPa for satisfying EU emission standards and improving fuel efficiency, and a heading process and an autofrettage process are required for preventing folding defects and improving fatigue life. In this study, the flow stress and SN data of the material of the pipe are obtained through a tensile test and a fatigue test. The heading process for checking the folding defects of pipe ends is performed by using FEA. Furthermore, the optimal design of the autofrettage process for improving fatigue life considering not only the compressive residual stresses of the inner surface but also the tensile residual stresses of the outer surfaces of the pipe under the repeated internal pressure is performed by using FEA. To verify the process design, fatigue analysis for the autofrettaged pipe is performed.
Keywords
Fuel Injection Pipe; Process Design; Heading Process; Autofrettage; Fatigue Life; FEA;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Ahlvik, P., 2001. "Swedish Experiences from Low Emission City Buses: Impact on Health and Environment," US DOE, 7th Diesel Emissions Reduction Workshop (DEER), Portsmouth, VA, August 2001.
2 LeTavac, C., Uihlein, J. and Vertin, K., 2002. "Year- Long Evaluation of Trucks and Buses Equipped with Passive Diesel Particle Filters," SAE Technical Paper 2002-01-0433.
3 Flaig, U., Polach, W. and Ziegler, G., "Common Rail System(CR-System) for Passenger Car DI Diesel Engines - Experiences with Applications for Series Production Projects," SAE, Paper No. 1999-01-0191, 1999.
4 Song, M. J. and Kim, C., 2010, "A Study for Preventing Folding Defect of the Common Rail Pipe in Heading Process," KSPE, Vol. 27, No.1, pp.25-32.
5 Park, C. J. and Koh, S. K., 2008, "Autofrettage Residual Stress Analysis of Fuel Injection Pipe," Trans. Korean Soc. Mech. Eng., Vol. Symposium of KSME 2008R1013, pp. 71-76.
6 Kim, J. H. and Shim, W. S., 2008, "A Study on Residual Stress Analysis of Autofrettaged Thick- Walled Cylinders," Trans. Korean Soc. Mech. Eng., Vol. Symposium of KSME 08MF080, pp. 482-487.
7 Kim, H. G., 2010, "Stress Behaviors on the Autofrettaged Cylinder Subjected to an Internal Pressure Loading," Trans. Korean Soc. Mech. Eng., Symposium of KSME, pp. 152-159.
8 EU., 2011, "Commission Regulation (EU) No. 582/2011 (Euro VI), Date is for New Registrations," Official Journal of the European Union, pp. 1-167.
9 Jorach, R., Bercher, P., Burke, D., Calvo, M., Guerrassi, N., Meissonier, G. and Milovanovic, N., 2011, "Diesel Common-Rail Fuel Technology for Future High-Efficiency Ultra Low Emission Light-Duty Engines," 11th Stuttgart international Symposium.
10 Song, S. A., "A Study on Improvement of Fatigue Life for the Fuel Injection Pipe of Common Rail System," M.D. thesis, Creative Engineering System, Pusan National University, 2013.
11 Davidson, T. E., Eisenstadt, R., and Reiner, A. N., 1963, "Fatigue Characteristic of Open-End Thickwalled Cylinders Under Internal Pressure," Journal of Basic Engineering, pp. 555-565.
12 Timoshenko, S. P., 1970, "Theory of Elasticity," Mc Graw-Hill, New York.
13 Hill, R., 1950, "The Mathematical Theory of Plasticity," Oxford University Press, London.