A study on the spray structure and evaporation characteristic of common rail type high pressure injector in homogeneous charge compression ignition engine

Ryu, Jea-Duk; Kim, Hyung-Min; Lee, Kihyung

doi:10.1016/j.fuel.2005.03.032

Cited by 20 publications

(12 citation statements)

References 9 publications

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“…All test fuels showed increasing P max as the FIP increased from 400 to 1000 bar (Figure a–c,d–f,g–i,j–l). Improved fuel atomization at higher FIPs produced finer spray droplets, which evaporated quickly, resulting in formation of more homogeneous fuel–air mixtures. − Because of higher FIP, the injection duration decreased, leading to a longer time available for fuel–air mixing. The presence of a more homogeneous fuel–air mixture promoted PCCI combustion and resulted in a higher P max value.…”

Section: Resultsmentioning

confidence: 99%

Fuel-Injection Strategy for PCCI Engine Fueled by Mineral Diesel and Biodiesel Blends

2017

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Premixed-charge compression ignition (PCCI) combustion is a novel combustion concept, whereby a partially homogeneous fuel–air mixture burns predominantly in a premixed combustion phase, which results in lower emissions of nitrogen oxides (NO x ) and particulates. This experimental study explored the possibility of PCCI combustion using three test fuels, namely, 20% (v/v) biodiesel blended with mineral diesel (B20), 40% (v/v) biodiesel blended with mineral diesel (B40), and baseline mineral diesel. To investigate the combustion, performance, and emission characteristics of the PCCI engine, experiments were performed in a single-cylinder research engine equipped with a common rail direct injection (CRDI) system. The effects of the fuel-injection pressure (FIP) and the timing of the start of main injection (SoMI) were investigated by varying the FIP from 400 to 1000 bar and the SoMI timing from 12° to 24° bTDC, respectively. Detailed investigations of the particulate morphology, particulate number–size distribution, and particulate-bound trace metals were also carried out. The results showed that PCCI combustion was significantly influenced by the fuel-injection parameters and that the combustion improved with increasing FIP (up to 700 bar). Further increasing the FIP resulted in inferior engine performance because of intense knocking. Increasing the FIP (up to 700 bar) reduced the NO x and particulate emissions through it improved fuel–air mixing. Among the three test fuels, B40 showed the best combustion and performance characteristics, and B20 showed emission characteristics superior to baseline mineral diesel. Because of inferior fuel–air mixing in the combustion chamber, B20 and B40 showed relatively higher particle number emissions compared to mineral diesel under identical conditions. Overall, this study suggests that fuel-injection parameters for optimized PCCI combustion vary with the properties of the test fuel.

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Section: Resultsmentioning

confidence: 99%

Fuel-Injection Strategy for PCCI Engine Fueled by Mineral Diesel and Biodiesel Blends

2017

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“…Later, Ryu et al [15] showed that the spray penetration length is directly proportional to the power of ¼ of back pressure. They also added that the spray impingements with ambient density have a greater influence on fuel evaporation and fuel mixture as compared to pressure and temperature intake condition.…”

Section: Literature Reviewmentioning

confidence: 99%

Modelling of spray evaporation and penetration for alternative fuels

Azami

Savill

2016

Fuel

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a b s t r a c tThe focus of this work is on the modelling of evaporation and spray penetration for alternative fuels. The extension model approach is presented and validated for alternative fuels, namely, Kerosene (KE), Ethanol (ETH), Methanol (MTH), Microalgae biofuel (MA), Jatropha biofuel (JA), and Camelina biofuel (CA). The results for atomization and spray penetration are shown in a time variant condition. Comparisons have been made to visualize the transient behaviour of these fuels. The vapour pressure tendencies are revealed to have significant effects on the transient shape of the evaporation process. In a given time frame, ethanol fuel exhibits the highest evaporation rate and followed by methanol, other biofuels and kerosene. Ethanol also propagates the farthest distance and followed by methanol and kerosene. However, all biofuels have a shorter penetration length in the given time. These give penalty costs to biofuels emissions formation. The influences of initial conditions such as temperature and droplet velocity are also explored numerically. High initial temperature and velocity could accelerate evaporation rate. However, high initial temperature has resulted in low penetration length while high initial velocity produces contrasting results.

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“…1 From the 1960s, under the condition that the oil crisis put great pressure on European and American countries' energy securities, alcohol fuel came into sight. [2][3][4][5] With the development of social economy, the Chinese oil import has gotten a rapid growth, [6][7][8][9][10][11] and the external dependence on oil has also increased. China became a net importer of oil since the early 1990s.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of emission characteristics based on new alcohol-based gasoline fuel

Zhang

Jiao

et al. 2017

Advances in Mechanical Engineering

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This article chose the new type alcohol-based fuel as the engine fuel, realized lean burn in a CA4GA5 engine, and got the lean burn limit to 20.6. Taking the gasoline as equivalent fuel, and according to 10%, 20%, and 30% volume proportion of alcohol-based fuel, three new types of alcohol-based gasoline synthetic fuel, M10, M20, and M30, were formed. A comparative study of the original engine emissions used new types of alcohol-based gasoline synthetic fuels with Compressed Natural Gas (CNG) and different blending ratios based on M0 at different stoichiometric air-to-fuel ratios was carried out. This article studied the influence of air-to-fuel ratio on cycle emissions under the lean burn condition and analyzed the characteristics of the new European driving cycle. Experimental results show that compared with the working condition of pure gasoline engine, the emissions of total hydrocarbon and carbon monoxide gradually reduce with the increase of alcohol-based fuel blending proportion, while the NO x content presents the rising trend.

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A study on the spray structure and evaporation characteristic of common rail type high pressure injector in homogeneous charge compression ignition engine

Cited by 20 publications

References 9 publications

Fuel-Injection Strategy for PCCI Engine Fueled by Mineral Diesel and Biodiesel Blends

Fuel-Injection Strategy for PCCI Engine Fueled by Mineral Diesel and Biodiesel Blends

Modelling of spray evaporation and penetration for alternative fuels

Experimental investigation of emission characteristics based on new alcohol-based gasoline fuel

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