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Development of Reliability Test mode for GDI Fuel Rail
Technical Paper
2019-01-0707
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Main role of fuel rail for GDI (Gasoline Direct Injection) system is to store and distribute gasoline between high pressure pump and injector. Under the engine operating condition, fuel pressure and ambient temperature are applied to fuel rail as fatigue load, which can cause fatigue failure.
To meet current a global environmental regulation, a fuel injection pressure is gradually increasing. Therefore a fuel rail for GDI engine which is installed between fuel pump and injector must be stronger than now. Also the target reliability of the fuel rail has to be increased than before.
Accordingly, fatigue behaviors of fuel rail must be analyzed and expected at the development stage.
In this study, a procedure for assessment the fatigue life of GDI fuel rail was developed. With this, fatigue load on the GDI fuel rail can be expected under actual vehicle operating conditions. Furthermore, fatigue life of a part can be verified based on the expected fatigue load. To establish certain process, pressure and temperature on fuel rail were measured under actual vehicle operating conditions. Afterwards, measured data was extrapolated to product warranty with probabilistic method and damage model specified. By applying obtained result, fatigue test mode was designed for fuel rail reliability target.
Finally, fatigue life of next generation fuel rail was expected by modifying and expanding an existing data and using above procedure.
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Koo, K., Oh, S., Kang, Y., and Kim, D., "Development of Reliability Test mode for GDI Fuel Rail," SAE Technical Paper 2019-01-0707, 2019, https://doi.org/10.4271/2019-01-0707.Data Sets - Support Documents
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References
- Bannantine , J.A. and Handrock , J.L 1989
- Carter , A.D.S. Mechanical Reliability and Design MacMillan Press LTD 1997 81 123
- Park , B.N. , Kim , K.H. , and Kim , H.K. An Evaluation Method of Fatigue Strength and Reliability in a Railway Wheel with an Application of Strength-Stress Interference Model Korean Society for Railway Jounal 5 2 131 137 2002
- Bain , L.J. Statistical Analysis of Reliability and Life Testing Models New York & Basel Marcel Dekker 1978
- Epstein , B. and Sobel Sequential Life Tests in the Exponential Case Annals of Mathematical Statistics 1955
- Amzallag , C. , Gerey , J.P. , Robert , J.L. , and Bahuaud , J. Standardization of the Rainflow Counting Method for Fatigue Analysis International Journal of Fatigue 16 4 287 293 1994
- Chu , C.-C. Fatigue Damage Calculation Using the Critical Plane Approach J. Eng. Mater. Technol. 1995
- Lechner , G. , Naunheimer , H. , Ryborz , J. , and Novak , W. Automotive Transmissions : Fundamentals, Selection, Design and Application Verlag Springer 1999