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Research on Expansion of Premixed Charge Compression Ignition (PCCI) Diesel Combustion Operation Range

Article of Honda R&D Technical Review Vol.22 No.2

Summary

In the area of diesel engines, the reduction of soot and NOx emissions is demanded through the achievement of increased combustion performance. High expectations are placed on premixed charge compression ignition (PCCI) combustion as a combustion method that will achieve breakthrough reductions in NOx and soot emissions. However, the use of this combustion method is restricted to the low-speed, low-load range because it becomes challenging to realize an ignition delay and combustion noise increases as the engine load increases.
The research discussed in this paper attempted to expand the range of application of PCCI combustion by increasing exhaust gas recirculation (EGR) cooling performance and employing a low compression ratio. The results of the research indicated that it was possible to extend the application of PCCI combustion to virtually the entire operating range employed in the European NEDC and North American FTP75 modes.

Reference

(1) Morita, T., Suzuki, N., Satoh, N., Wada, K., Ohno, H.: Study on low NOx emission control using newly developed lean NOx catalyst for diesel engines: SAE paper, 2007-01-0239 (2007)
(2) Wada, K., Suzuki, N., Satoh, N., Morita, T., Yamaguchi, S., Ohno, H.: Study on emission-reducing method with new lean NOx catalyst for diesel engines: SAE paper, 2007-01-1933 (2007)
(3) Murata, Y., Komiya, R., Kaneko, A., Daisho, Y., Suzuki, H., Ishii, H.: A study on the improvement of NOx reduction efficiency for a urea SCR system (Third report) -High NOx reduction efficiency mechanism at transient operation with low exhaust gas temperatures: JSAE paper, 20085846 (2008)
(4) Kimura, S., Aoki, O., Kitahara, Y. , Aiyoshizawa, E.: Ultra-Clean combustion technology combining a low-temperature and premixed combustion concept for meeting future emission standards: SAE paper, 2001-01-0200 (2001)
(5) Akihama, K., Sasaki, S.: Mechanism of smokeless rich diesel combustion by reducing temperature: SAE paper, 2001-01-0655 (2001)
(6) Kanda, T., Hakozaki, T., Uchimoto, T., Hatano, J., Kitayama, N., Sono, H.: PCCI operation with early injection of conventional diesel fuel: SAE paper, 2005-01-0378 (2005)
(7) Kanda, T., Hakozaki, T., Uchimoto, T., Hatano, J., Kitayama, N., Sono, H.: PCCI operation with fuel injection timing set close to TDC: SAE paper, 2006-01-0920 (2006)

Author (organization or company)

Junichi HATANO(Automobile R&D Center)、Takeya HARADA(Automobile R&D Center)、Kazuhiro MATSUI(Automobile R&D Center)、Hiroki KOBAYASHI(Automobile R&D Center)、Ryuta MATSUI(Automobile R&D Center)

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