Effect of injection timing on knock combustion and pollutant emission of heavy-duty diesel engines at low temperatures

Wu, Han; Dong, Xinyi; Shi, Zhi‐Cheng; Li, Haiying; Cao, Weiren; Zhang, Lu; Bo, Yaqing; Li, Xiangrong

doi:10.1016/j.chemosphere.2022.135519

Cited by 11 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The temperature in the combustion chamber must be maintained if it is too cold; temperatures that are too hot are also not allowed because the fuel will burn first because the temperature in the combustion chamber is too hot before the fuel and air are compressed during the compression process the fuel has burned because the flash point in the fuel is sufficient for the fuel to burn. The effect of wall conditions on the spraying and ignition process differs depending on the ambient and wall temperatures (Wu et al, 2022). Physical ignition delay refers to the formation of the fuel-air mixture, and chemical ignition delay to the time required for the rapid increase in the rate of chemical reactions.…”

Section: Findings and Discussionmentioning

confidence: 99%

Identify The Cause and Effect of Detonation In The Main Engine

Tjahjono,

Cahyadi,

Indriyani

et al. 2023

cset

View full text Add to dashboard Cite

In the process of shipping, the main engine must always be maintained in prime condition to support the smooth sailing of a ship. In the main engine, there are often oddities or things that are not common in the main engine, one of which is knocking. The purpose of this study is to identify detonation that occurs in the main engine, analyze the causes and consequences of detonation. The research method used in this research is qualitative. Sources of research data obtained from data collection techniques through observation, interviews, documentation, and data validity techniques using internal validity. The place and time of the research were conducted at MV. Tanto Hemat for one year. SWOT method to analyze various factors that can be used to optimize blasting systematically against strengths, weaknesses, opportunities, and threats. The study results identify detonation in the main engine, namely ignition delay and pre-ignition in the main engine. Factors that cause detonation in the main engine are poor fuel quality, high pressure and temperature in the engine combustion chamber, and improper combustion timing. The impact caused by detonation on the main engine is detonation will cause an increase in fuel consumption, damage to engine spare parts, and carbon buildup in the combustion chamber.

show abstract

Section: Findings and Discussionmentioning

confidence: 99%

Identify The Cause and Effect of Detonation In The Main Engine

Tjahjono,

Cahyadi,

Indriyani

et al. 2023

cset

View full text Add to dashboard Cite

show abstract

“…Обычно кристаллит состоит из двух до пяти пластинок. Расстояние между слоями составляет 3,55 нм, это лишь ненамного больше, чем у графита, толщина кристаллитов составляет около 12 нм [20].…”

Section: образование сажи в дизельных двигателяхunclassified

Soot formation and effect on engine oils

Pashukevich

2023

Vestn. SibADI

View full text Add to dashboard Cite

Introduction. During the combustion of diesel fuel in a diesel engine with an increased fuel supply, as a result of its incomplete combustion, soot particles are formed, which are either released into the atmosphere or inevitably enter the engine oil. Soot, polluting the engine oil, causes a change in its quality indicators. Soot is very small particles formed by a complex reaction mechanism in the flame of a fuel-rich region during the combustion of hydrocarbons in the absence of air, mainly consisting of a mixture of amorphous carbon and organic matter.Materials and methods. This paper presents the results of a literary review aimed at studying the ways of soot occurrence during the operation of diesel engines, its effect. The mechanical properties of diesel soot are also discussed on the surfaces of friction pairs and engine components.Conclusions. The soot content in engine oil will increase sharply in engines with exhaust gas recirculation, which leads to an increase in temperature in the friction zones and viscosity of the lubricant, as well as to the formation of deposits on hot parts. These processes occur due to the discharge in the crankcase space and the intensification of the intake of gases from the combustion chamber. Oil change intervals should be monitored at an increased rate of soot entering the engine oil.Scope of the study / opportunity. This type of study will help determine the causes of soot in a diesel engine, understand the consequences of using engine oil contaminated with soot particles.Originality / value. The conducted research can be the basis for the development of recommendations for improving the maintenance of internal combustion engines for enterprises that have cars with diesel engines at their disposal in order to increase the resource of power units and reduce operating costs.

show abstract

“…The influence of the wall temperature was further experimentally and numerically studied by Jüngst et al [11], who found that the wall temperature determined the fuel-adhesion temperature, and the evaporation rate increased as the wall temperature increased. In addition, injection and ambient parameters such injection and ambient pressure [12][13][14][15], injection duration [16,17], the dwell time of spilt injections [18], injection timing [19], and ambient temperature [19] have a strong effect on adhesive features. Xiao et al reported that the horizontal diffusion distance of the spray was larger than the width of fuel adhesion [12].…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al investigated split-injection strategies on fuel-adhesion formation [18], and increasing the dwell time could decrease both the concentration and dense adhesion lifetime. Wu et al postulated that the rate at which fuel adhesion forms increases quickly as the injection timing is brought forward [19]. According to a previous investigation [20][21][22], fuel adhesion was inversely related to ambient temperature, which means that an expanded high-temperature zone helps in accelerating the evaporation and combustion of fuel adhesion.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Adhesive Fuel Features of Inclined Wall-Impinging Spray at Various Injection Pressure Levels in a Cross-Flow Field

et al. 2023

View full text Add to dashboard Cite

The wall-impingement phenomenon significantly impacts mixture formation, combustible performance, and pollutant release in DISI engines. However, there is insufficient knowledge regarding the behavior of fuel adhesion. Thus, here, we examine adhesive fuel features at various injection pressure levels (5 and 10 MPa) in a cross-flow field (0 to 50 m/s). The RIM optical method was employed to track the expansion and distribution of fuel adhesion. As a result, adhesive fuel features such as area, mass, thickness, and lifetime were assessed. Postprocessing image analysis reveals that fuel adhesion was consistently thinner at the edge region. With increased injection pressure, the cross flow led to a rise in the fuel-adhesion area and mass; however, small changes in pressure did not affect adhesive thickness. Adhesive thickness significantly decreased in the cross flow, indicating enhanced evaporation potential. Furthermore, lifetime prediction was conducted to quantitatively evaluate the impact of cross flow and injection pressure upon fuel adhesion, which could be calculated by examining the decreasing trend in adhesive area. Results show that the lifetime was dramatically reduced with higher cross-flow velocity, and slightly decreased with lower injection pressure. Under injection pressure of 10 MPa, the adhesive lifetime in the cross-flow field of 50 m/s was reduced by 77.5% compared with the static flow field (0 m/s). The experimental results provide corresponding guidance for low-carbon fuel utilization and emission reduction in DISI engines.

show abstract

Effect of injection timing on knock combustion and pollutant emission of heavy-duty diesel engines at low temperatures

Cited by 11 publications

References 24 publications

Identify The Cause and Effect of Detonation In The Main Engine

Identify The Cause and Effect of Detonation In The Main Engine

Soot formation and effect on engine oils

Experimental Study on the Adhesive Fuel Features of Inclined Wall-Impinging Spray at Various Injection Pressure Levels in a Cross-Flow Field

Contact Info

Product

Resources

About