Open Access

ARTICLE

Test Research on the Knock of a Common-Rail Diesel Engine Fueled with Diesel-Methanol Dual-Fuel

by Chao Zhu¹, Zhuopei Liu², Hao Chen^2,3, Yangyang Li^2,3,*

1 State Grid Shaanxi Electric Power Research Institute, Xi’an, 710100, China
2 School of Energy and Electrical Engineering, Chang’an University, Xi’an, 710064, China
3 Shaanxi Key Laboratory of Development and Application of New Transportation Energy, Chang'an University, Xi’an, 710064, China

* Corresponding Author: Yangyang Li. Email:

Energy Engineering 2023, 120(5), 1081-1105. https://doi.org/10.32604/ee.2023.026000

Received 09 August 2022; Accepted 09 October 2022; Issue published 20 February 2023

Abstract

Experiments were conducted on a diesel-methanol dual-fuel (DMDF) engine modified by a six-cylinder, turbo-charged, inter-cooled diesel engine. According to the number of diesel injection, the experiments are divided to two parts: the single injection mode and double injection mode. The results show that, at the double injection mode, the maximum of pressure rise rate is small and the engine runs smoothly, however, knock still occurs when the co-combustion ratio (CCR) is big enough. Under knock status, the power density of the block vibration concentrating at some special frequencies rises dramatically, and the special frequency of single injection mode (about 4.1 kHz) is lower than that of double injection mode (7–9 kHz). The cylinder pressure oscillations of knock status are very different from the non-knock status. Under knock status, cylinder pressure oscillations become more concentrated and fiercer at some special frequencies, and the same as the block vibration. The special frequency of single injection mode (3–6 kHz) is lower than that of double injection mode (above 9 kHz).

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Keywords

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