Abstract
Various technologies are being studied for the advancement of diesel passenger cars and associated environmental regulations. Effective compression ignition combustion in diesel engines is highly dependent on the cylinder charging temperature, composition, and cylinder pressure during valve train operation. The application of variable valve control in diesel engines has several potential advantages. In this study, we applied the variable valve actuation system to a single-cylinder engine model using a GT-POWER simulation and analyzed the effects of the recompression and rebreathing valve profiles, and fuel-injection pressure on the combustion characteristics of a compression ignition engine. As a result, NOx emissions were reduced by more than 90 %, while those of indicated mean effective pressure were reduced by up to 35 %. The benefits of recompression strategies in terms of NOx emissions reduction were confirmed.
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Abbreviations
- VVA:
-
Variable valve actuation
- HCCI:
-
Homogeneous charge compression ignition
- NVO:
-
Negative valve overlap
- IMEP:
-
Indicated mean effective pressure
- EGR:
-
Exhaust gas recirculation
References
J. H. Kim, C. S. Bae and M. S. Choi, The effects of valve timing and duration on the fuel economy in a gasoline engine, Proceeding of the 2014 KSME Spring-Autumn Conference (2014) 1611–1616.
S. H. Keum and D. H. Jung, Recent trends in HCCI engine research, KSAE (2010) 54–59.
H. Zhao, J. Li, T. Ma and N. Ladommatos, Performance and analysis of a 4-stroke multi-cylinder gasoline engine with CAI combustion, SAE (2002) 2002–01-0420.
O. S. Kwon and O. T. Lim, Effect of boost pressure on thermal stratification in HCCI engine using the multi-zone model, J. of Mechanical Science and Technology, 24 (1) (2010) 399–406.
T. V. Johnson, Review of vehicular emissions trends, SAE Int. J. Engines, 8 (3) (2015) 1152–1167.
T. Huong Thi Tran, H. Enomoto, K. Nishioka and K. Simizu, Development of small gasoline engine with electronic variable valve timing unit, SAE Technical Paper (2011) 32–0579.
T. Johnson and A. Joshi, Review of vehicle engine efficiency and emissions, SAE Technical Paper (2017) 01–0907.
S. C. Kim and C. K. Kim, A numerical analysis for fuel consumption by improvement of intake/exhaust valve timing in a common rail diesel engine for a generator, Korean Society for Energy (2017) 32–38.
S. I. Han, J. H. Kim and J. W. Lee, A study on the optimal actuation structure design of a direct needle-driven piezo injector for a CRDi engine, Appl. Sci., 7 (4) (2017) 320.
Acknowledgments
This research was supported by the R&D project on Industrial Core Technology of the Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea.
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Jinwook Lee received his Ph.D. in Mechanical Engineering from Seoul National University, Korea. He is currently a Professor of Mechanical Engineering, Soongsil University. His research interests are automotive powertrain system and clean energy technology for ICEV, HEV and FCEV.
Insu Cho received his Ph.D. (2020) in Mechanical Engineering from Soongsil Uni-versity, Korea. He now serves as an Assistant Researcher in the Automotive Powertrain Laboratory at Soongsil University. His research interests are fuel injection system, HEV powertrain system, and vehicle system simulation.
Wootaek Kim is an undergraduate in Mechanical Engineering, Soongsil University, Korea. He now serves as a Bachelor-Masters degree student in the Automotive Powertrain Laboratory at Soongsil University. His research interests are fuel injection system, low emission powertrain system, and vehicle system simulation.
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Cho, I., Kim, W. & Lee, J. Analysis on possibility of expanding low-load operation area for homogeneous charge compression ignition in CI engine with variable exhaust valve actuation. J Mech Sci Technol 34, 1365–1372 (2020). https://doi.org/10.1007/s12206-020-0234-0
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DOI: https://doi.org/10.1007/s12206-020-0234-0