INVESTIGATION OF THE COMBINED USE OF DIESEL AND CNG FUELS ON AN HCCI ENGINE USING RESPONSE SURFACE METHODOLOGY (RSM)

Articles in Press

Document Type : Article

Authors

1 Erzincan Binali Yıldırım University, Vocational High School, Erzincan, Turkiye

2 Gazi University, Faculty of Technology, Department of Automotive Engineering, Ankara, Turkiye

3 Burdur Mehmet Akif Ersoy University, Technical Sciences of High Vocational School, Burdur, Turkiye

Abstract

In this study, the effects of the combined use of diesel and compressed natural gas (CNG) fuels on the performance, combustion and emissions were experimentally and statistically investigated in a homogeneous charged compression ignition (HCCI) engine. Diesel and CNG fuels were used at different ratios between 0% and 80% by mass, and tests were conducted at different engine loads. The experimental procedure was designed using the response surface method (RSM) composite central design method. The experimental data were analyzed using MATLAB and entered into the RSM. In order to determine the response parameters predictably, model equations were created, counter graphs were drawn and optimization was carried out. Engine load and CNG ratio, which are the optimum input parameters, were determined as 68.36% and 2.864%, respectively. The response parameter values were obtained as 4.487 bar for IMEP, 39.3% for ITE, 255.5 g/kWh for BSFC, 3.343% for COVimep, 0.247% for CO, 191.566 ppm for HC, 579.538 ppm for NOx and 1.393 m-1 for smoke. This study, in which a combined diesel and CNG fueled engine operating in HCCI combustion mode is examined with experimental and statistical methods, will fill an important gap in the literature and provide researchers with a new perspective.

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Scientia Iranica

Articles in Press, Accepted Manuscript
Available Online from 14 April 2024

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History

  • Receive Date: 29 December 2022
  • Revise Date: 12 October 2023
  • Accept Date: 14 April 2024

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