Development of Real-time Combustion Analysis System for IC Engine Based on Real-time Optimization

被引：0
|
作者：
Wang Z. [1 ]
Guo K. [1 ]
Wu W. [1 ]
Qin G. [1 ]
Yang C. [1 ]
Cheng X. [1 ]
机构：
[1] College of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan
来源：
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2020年 / 51卷 / 01期
关键词：
Combustion analysis system; Cylinder pressure online filtering; IC engine; Optimization; Real-time performance;
D O I：
10.6041/j.issn.1000-1298.2020.01.041
中图分类号：
学科分类号：
摘要：
The homogeneous charge compression ignition (HCCI) and reactivity controlled compression ignition (RCCI) engines are very sensitive to the in-cylinder compression temperature, the spatial distribution of fuel and air, and the component of fuels. Variation of these facts will result in the cyclic variation in IC engine. Based on the needs of cyclic variation research in HCCI engine and RCCI engine, an online cylinder pressure acquisition and real-time combustion analysis system adopting in-cylinder pressure sensor, data acquisition card, photoelectric encoder and LabVIEW software was built. In order to improve the real-time performance of combustion analysis system, only single cycle cylinder pressure was collected and calculated. There were much pressure fluctuation in single cycle cylinder pressure resulting from channel effect and other effect, and a real-time filtering of in-cylinder pressure was adopted to reduce the interference error of single cycle in-cylinder pressure data. The filtering methods based on spectrum analysis, like fast Fourier transformation (FFT), linear interpolation and inverse fast Fourier transform (IFFT), can realize the online adaptive identification and auto pressure smooth for the single cycle in-cylinder pressure, which made the real-time combustion analysis system for HCCI and RCCI mode possible. Then, based on the smoothed cylinder pressure, some important combustion parameters such as the maximum pressure increase rate, combustion heat release rate and in-cylinder peak pressure were calculated. In order to further improve the real-time performance of the combustion analysis system, the producer/consumer operation mode which can achieve the synchronized process of real-time data calculation and fast data storage was used. The improved data sharing ability can improve the real-time ability of the combustion calculation. Different accuracy levels of calculation methods were adopted for different working stages in engine, which can reduce the calculation time for intake, exhaust, compression and expansion stages. In combustion stage, which had the largest calculating workload, the appropriate simplified calculation formulas and formula node operation modules were adopted to improve the real-time performance. Finally, the real-time performance of the combustion analysis system was analyzed and an experimental verification of the combustion analysis system was carried out. © 2020, Chinese Society of Agricultural Machinery. All right reserved.
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页码：372 / 382
页数：10
相关论文
共 15 条
  • [1] Dong S., Cheng X., Ou B., Et al., Experimental and numerical investigations on the cyclic variability of an ethanol/diesel dual-fuel engine, Fuel, 186, pp. 665-673, (2016)
  • [2] Wang Z., Zhang Z., Xu F., Et al., Study of cycle variation in a multi-cylinder gasoline HCCI engine, Chinese Internal Combustion Engine Engineering, 31, 3, pp. 1-6, (2010)
  • [3] Saxena S., Bedoya I.D., Fundamental phenomena affecting low temperature combustion and HCCI engines, high load limits and strategies for extending these limits, Progress in Energy and Combustion Science, 39, 5, pp. 457-488, (2013)
  • [4] Shahbakhti M., Koch C.R., Characterizing the cyclic variability of ignition timing in a homogeneous charge compression ignition engine fuelled with n-heptane/iso-octane blend fuels, International Journal of Engine Research, 9, 5, pp. 361-397, (2008)
  • [5] Ren C., Zeng D., Leng S., Study on cyclic variation of diesel engine in idle condition, Journal of Xihua University(Natural Science), 35, 5, pp. 7-12, (2016)
  • [6] Wang J., Nan J., Sun F., Et al., Realization of the data acquisition system based on LabVIEW, Computer Engineering and Applications, 21, pp. 122-125, (2003)
  • [7] Shi S., Sheng H., Three digital filtering methods for proeessing indieator diagrams of internal combustion engines, Transactions of CSICE, 4, 4, pp. 289-304, (1986)
  • [8] Li Z., The development of combustion analytical system of internal combustion engine based on virtual instrument technology, (2007)
  • [9] Zhao X., Cheng Y., Wang L., Et al., On-line identification of maximum rate of pressure rise based on vibration velocity signals, Transactions of CSICE, 34, 1, pp. 74-80, (2016)
  • [10] Wang J., Zhang Y., Wang X., Et al., De-noising of cylinder pressure signal in diesel engine based on wavelet transform, Journal of Test and Measurement Technology, 22, 2, pp. 140-144, (2008)
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