Welcome to Acta Armamentarii ! Today is Share:

Acta Armamentarii ›› 2020, Vol. 41 ›› Issue (3): 426-433.doi: 10.3969/j.issn.1000-1093.2020.03.002

• Paper • Previous Articles     Next Articles

Analysis about the Influences of Different Fuels on the Combustion Stability of a Heavy Duty Diesel Engine

GU Cheng1, QIAO Xinyong1, HAN Lijun2   

  1. (1.Vehicle Engineering Department, Army Academy of Armored Forces, Beijing 100072, China;2.Urumqi Campus of Engineering University of PAP, Urumqi 830049, Xinjiang, China)
  • Received:2019-05-14 Revised:2019-05-14 Online:2020-05-11

Abstract: In order to reveal the influences of different fuels on the cyclical variation of diesel combustion process, three military diesel fuels A, B, and C were selected as fuels for the bench test under the calibration conditions and the maximum torque conditions. The three-dimensional phase space of the in- cylinder pressure time series was reconstructed. The combustion stability of diesel engine was quantitatively analyzed by using the cyclic fluctuation rate of the combustion parameters, and the average indicated pressure was studied from the return mapping. The results show that the state of cylinder in diesel engine exhibits certain chaotic characteristics. During the combustion process, the pressure in the cylinder is oscillating. Compared with Fuel B and Fuel C, the traces of Fuel A in the combustion stage are relatively dense. The peak pressure fluctuation rate in the combustion stage corresponds to the pressure oscillation region. Under the maximum torque condition, the first two peak pressure fluctuation rates of Fuel A are the lowest, the combustion delay period is the shortest, and the average indicated pressure cycle is the smallest. The combustion stabilities of three diesel fuels are improved with the increase in the rotational speed. Key

Key words: heavydutydieselengine, fuel, combustionstability, cyclicfluctuation

CLC Number: