This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Combustion Optimization by Means of Common Rail Injection System for Heavy-Duty Diesel Engines
Annotation ability available
Sector:
Language:
English
Abstract
This paper describes the combustion optimizations of heavy-duty diesel engines for the anticipated future emissions regulations by means of an electronically controlled common rail injection system. Tests were conducted on a turbocharged and aftercooled (TCA) prototype heavy-duty diesel engine. To improve both NOx-fuel consumption and NOx-PM trade-offs, fuel injection characteristics including injection timing, injection pressure, pilot injection quantity, and injection interval on emissions and engine performances were explored. Then intake swirl ratio and combustion chamber geometry were modified to optimize air-fuel mixing and to emphasize the pilot injection effects. Finally, for further NOx reductions, the potentials of the combined use of EGR and pilot injection were experimentally examined. The results showed that the NOx-fuel consumption trade-off is improved by an optimum swirl ratio and combustion chamber geometry as well as by a new pilot concept. However, the combination of pilot injection and EGR had little advantages in further improving NOx-PM trade-off since smoke increases especially in low load conditions.
Recommended Content
Authors
Topic
Citation
Uchida, N., Shimokawa, K., Kudo, Y., and Shimoda, M., "Combustion Optimization by Means of Common Rail Injection System for Heavy-Duty Diesel Engines," SAE Technical Paper 982679, 1998, https://doi.org/10.4271/982679.Also In
References
- Durnholtz, M. Helmut, E. Frisse, P. “Preinjection A Measure to Optimize the Emission Behavior of DI-Diesel Engine,” SAE Paper 940674 1994
- Takeda, Y. Nakagome, K. Niimura, K. “Emission Characteristics of Premixed Lean Diesel Combustion with Extremely Early Staged Fuel Injection,” SAE Paper 961163 1996
- Yokota, H. Kudo, Y. Nakajima, H. Kakegawa, T. Suzuki, T. “A New Concept for Low Emission Diesel Combustion,” SAE Paper 970891 1997
- Baert, R. S. G. Beckman, D. E. Verbeek, R. P. “New EGR Technology Retains HD Diesel Economy with 21 st Century Emissions,” SAE Paper 960848 1996
- Uchida, N. Daisho, Y. Saito, T. Sugano, H. “Combined Effects of EGR and Supercharging on Diesel Combustion and Emissions,” SAE Paper 930601 1993
- Pieroont, D. A. Montgomery, D. T. Reitz, R. D. “Reducing Particulate and NOx Using Multiple Injections and EGR in a D.I. Diesel,” SAE Paper 950217 1995
- Montgomery, D. T. Reitz, R. D. “Six-Mode Cycle Evaluation of the Effect of EGR and Mutiple Injections on Particulate and NOx Emissions from a D.I. Diesel Engine,” SAE Paper 960316 1996
- Shimoda, M. Funai, K. Shimokawa, K. Ohtani, T. Joko. I. “Application of Heavy Duty Diesel Engine to Future Emission Standards,” SAE Paper 910482 1991
- Takenaka, Y. Kudo, Y. Kakegawa, T. Shiozaki, T. Aoyagi, Y. “The Spray Models and Their Influence on Ignition,” SAE Paper 950279 1995
- Fuchs, H. Pitcher, G. Wiesler, B. Wigley, G. Winklhofer, E. “Untersuchung der Einspritzstrahl-Sturuktur unter dieselmotorischen Bedingungen,” MTZ 54 88 95 February 1993