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A New Type Partial Flow Dilution Tunnel with Geometrical Partitioning for Diesel Particulate Measurement
Technical Paper
2001-01-3579
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
Spring Fuels & Lubricants Meeting & Exhibition
SAE International Fall Fuels & Lubricants Meeting & Exhibition
Language:
English
Abstract
The authors have developed a new partial flow dilution tunnel (hereafter referred to as PPFT), whose principal device is a flux splitting gas divider, as a new means of measuring particulate emissions which can be applied to transient cycle testing of diesel engines. The advantage of this system is that it can achieve perfect constant velocity splitting by means of its structure, and theoretically can also maintain high splitting performance despite fluctuations in the exhaust flow rate, including those due to engine exhaust pulsation. We compared this system with a full tunnel by analyzing the basic performance of the system and measuring particulate matter (PM) using an actual vehicle engine.
The results obtained from measuring the relative flow rates of exhaust gas show that combining the gas divider with a turbulence reduction screen generates a flow rate distribution with axial symmetry and gives splitting performance with a high degree of correlation (regression line within , coefficient of correlation =0.9990) in any of three test cycles: D13, FTP, or ETC. In addition, a comparison of the total mass of gaseous emission components based on the results of measurements on the raw gas and gas with the emissions diluted by the PPFT demonstrated that even integral values of the gaseous emissions are accurately divided, and that the system has a high degree of repeatability even for transient cycle mode operation.
In comparison with the full tunnel, the maximum deviation in the PM mass rate in steady-state operation was no greater than 12%, and an overall correlation coefficient of 0.9799 was obtained. The average of four PM mass rate measurements was within 2% for all three test modes -D13, FTP, and ETC-and the maximum percentage deviation was within 5%. This means that the PPFT has equivalent characteristics to a full tunnel, and the same high level of repeatability as with a full tunnel was obtained.
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Authors
- Matsuo Odaka - National Traffic Safety and Environment Laboratory
- Yuichi Goto - National Traffic Safety and Environment Laboratory
- Yujiro Tsukamoto - National Traffic Safety and Environment Laboratory
- Mitsunobu Sekiya - ONO SOKKI CO.LTD.
- Yoshihiro Yoshimura - ONO SOKKI CO.LTD.
- Tadashi Ikeda - ONO SOKKI CO.LTD.
Citation
Odaka, M., Goto, Y., Tsukamoto, Y., Sekiya, M. et al., "A New Type Partial Flow Dilution Tunnel with Geometrical Partitioning for Diesel Particulate Measurement," SAE Technical Paper 2001-01-3579, 2001, https://doi.org/10.4271/2001-01-3579.Also In
References
- Takeda Yoshinaka et al. “Diesel Particulate Measurement by Multi-tube Type Partial Flow Dilution Tunnel” Proceedings of Japanese Society of Automotive Engineers
- Hayashida Morimasa et al. “Accuracy of Partial Flow Dilution Tunnel for Particulate Measurement (2 nd report)” Proceedings of 21 st Technical Conference of Traffic Safety and Nuisance Research Institute, Ministry of Transport 1991 11
- Hiroyasu Hiroyuki et al. “Particulate Formation in Diesel Engines” Journal of JSAE 35 2 1981
- Kittelson David B. Johnson John H. “Reliability in Particle Emission Measurements in the Heavy Duty Transient Test” SAE. 910738 1991
- Odaka Matsuo Tsukamoto Yujiro et al. “Development of Automatic Engine Control System with Predictive Control and its Application for Heavy Duty Diesel Engines” SAE. 900234 1990
- Mori Shigeru et al. “An approach for accuracy of Particulate Measurement with Partial Flow Dilution Tunnel” Proceedings of 20 th . Technical Conference of Traffic Safety and Nuisance Research Institute, Ministry of Transport 1990 12