An Observation of High Temperature Combustion Phenomenon in Low-Heat-Rejection Diesel Engines

Wang, Yiming; Yang, Changlin; Shu, Guocai; Ju, Yincheng; Zhao, Kuihan

doi:10.4271/940949

Cited by 7 publications

(4 citation statements)

References 4 publications

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“…However, it has been observed that the delay in injection timing without modification in the valve adjustment reduced both the specific fuel consumption and NO x emissions. Similar conclusions were also reported in the literature [21,25].…”

Section: Effects Of Equivalence Ratio On No X Emissionssupporting

confidence: 91%

Experimental study of NOx emissions and injection timing of a low heat rejection diesel engine

Büyükkaya

Cerit

2008

International Journal of Thermal Sciences

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Section: Effects Of Equivalence Ratio On No X Emissionssupporting

confidence: 91%

Experimental study of NOx emissions and injection timing of a low heat rejection diesel engine

Büyükkaya

Cerit

2008

International Journal of Thermal Sciences

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“…It was found that ignition delay following fuel injection was reduced, impairing air-fuel mixing, and ultimately prolonging combustion duration. [15] A reduced fuel injector nozzle orifice diameter or the employment of special impingement plates to enhance air-fuel mixing was suggested. THE SHORTCOMINGS OF LHR RESEARCH are mainly the result of the improvisation of conventional engines to LHR designs.…”

Section: Background the Low Heat Rejection Enginementioning

confidence: 99%

An Optimized Low Heat Rejection Engine for Automotive Use - An Inceptive Study

Leidel¹

1997

SAE Technical Paper Series

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An unconventional low heat rejection (LHR) engine design is described. Previous research efforts into LHR concepts, including high temperature materials and tribology, are reviewed. The continued reliance on conventional compression ignition designs is identified as a significant roadblock. Therefore, a set of design criteria is established, and an original design is formulated. The powerplant consists of an independent positive displacement compressor and expander, a high pressure combustor, and a compressed air accumulator. Compatibility with ceramic materials and high temperature combustion were primary goals. Inherent characteristics include full torque from zero RPM, enhanced combustion, improved efficiency under part load operation, and increased volumetric and thermodynamic efficiencies. These potential improvements warrant the design and construction of a prototype for further study.

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“…al. [4] on a study of the combustion phenomena under high temperature using constant volume chamber has concluded that at high temperature the ignition delay becomes very short and the ignition occurs near the nozzle tip and lastly the combustion duration was prolonged. The decrease of temperature dependence at high temperatures is due to the physical delay in the beginning of injection.…”

Section: Introductionmentioning

confidence: 99%

Effects of Temperature and Ambient Pressure on Spray Characteristics of Biodiesel Combustion

Jaat

Khalid

Sapit

et al. 2015

AMM

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s: Diesel fuel injection is the most dominant in ignition process of the diesel engines combustion. Diesel engines have been widely used in heavy-duty and light-duty vehicles due to their higher fuel economy, efficient and powerful than spark ignition (SI) engines. The principal objective of this research is to seek the effect of temperature and pressure on the spray characteristics, as well as fuel-air mixing characteristics. Experiments were performed in a constant volume chamber at specified ambient gas temperature and pressure. This research was continued with injecting diesel fuel into the chamber using a Bosch common rail system. Direct photography technique with a digital camera was used to clarify the real images of mixture formation such as spray penetration, fuel evaporation and spray interference. The liquid phase of the spray reaches a maximum penetration distance soon after the start of injection, while the vapour phase of the spray continues to penetrate downstream. The condition to which the fuel is affected was estimated by combining information on the wall chamber temperature, ambient temperature and photographs of the spray. The increases in ambient pressure inside the chamber resulting in gain of spray area and wider spray angle. Thus predominantly promotes for a better fuel-air premixing.

show abstract

An Observation of High Temperature Combustion Phenomenon in Low-Heat-Rejection Diesel Engines

Cited by 7 publications

References 4 publications

Experimental study of NOx emissions and injection timing of a low heat rejection diesel engine

Experimental study of NOx emissions and injection timing of a low heat rejection diesel engine

An Optimized Low Heat Rejection Engine for Automotive Use - An Inceptive Study

Effects of Temperature and Ambient Pressure on Spray Characteristics of Biodiesel Combustion

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