Study of low load performance on a two-stroke direct injection spark ignition aero-piston engine fuelled with diesel

Liu, Rui; Ji, Haocheng; Wei, Minxiang

doi:10.1108/aeat-08-2020-0158

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…LPG was effective in reducing CO emissions, and CNG in reducing HC, CO2, and NOx emissions. Liu et al [12] investigated the effects on performance, fuel consumption and emissions by using diesel in a two-stroke spark ignition engine. The low load condition is considered according to parameters such as ignition advance and EAR.…”

Section: Introductionmentioning

confidence: 99%

The effects of E80D20 ethanol-diesel blend on combustion and exhaust emissions in SI engine

ARSLAN,

İLHAK

2023

International Journal of Energy Studies

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One of the renewable fuels is ethanol, which is widely used in internal combustion engines. Ethanol is produced from renewable sources such as sugar cane, corn, potato, and biomass. It has high octane number, however, lower calorific value than that of gasoline and diesel. Since ethanol is a corrosive fuel, it cannot be used completely pure, so it is used as a mixture in internal combustion engines. Therefore, ethanol was mixed with diesel fuel to both eliminate its corrosive effect and increase its calorific value and used to examine engine performance and exhaust emissions in an SI engine at partial loads in this study. Four-stroke and four-cylinder test engine was used, and the experiments were carried out at constant speed of 2000 rpm, at 25 Nm and 50 Nm load, and with different excess air ratios (λ). The fuel mixture used in experimental studies was set as 80%Ethanol+20%Diesel (E80D20). To see the effect of the E80D20 mixture more clearly, the same experiments were also repeated with pure gasoline and pure ethanol, and these three fuel conditions were presented comparatively. At 25Nm and λ= 0.9, the use of E80D20 resulted in a 15% reduction in BSFC compared to the use of pure ethanol. When emissions are considered, the use of E80D20 in lean mixture (λ=1.1) showed a decreasing trend in HC and NOx emissions.

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Section: Introductionmentioning

confidence: 99%

The effects of E80D20 ethanol-diesel blend on combustion and exhaust emissions in SI engine

ARSLAN,

İLHAK

2023

International Journal of Energy Studies

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Atomization Characteristics of Low-Volatility Heavy Fuel for Low-Pressure Direct Injection Aviation Piston Engines

Huang

Qiao

et al. 2022

Journal of Energy Resources Technology

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Due to safety and convenience, aviation heavy fuel (AHF) is quite suitable for use as an energy source in aviation piston engines for small aerial drones, although its atomization is an important issue. The purpose of this paper is to present the atomization mechanism of AHF during low-pressure direct injection (LPDI) and the results of the investigation of the mixing process and flow state of fuel-air two-phase flows. In this study, experimental data were obtained for parameters of fuel spray, which verified the improved calculation model of LPDI that considered the primary atomization of AHF inside the premixing chamber. The influences of injection pressure, ambient pressure and AHF temperature on the spray characteristics were compared and analyzed. Increasing the injection pressure reduced the spray cone angle and increased the spray area. The penetration distance increased, and the Sauter mean diameter (SMD) of the fuel droplets decreased. Raising the ambient pressure had significant effects on penetration distance and SMD. The spray area decreased, and the spray cone angle showed small variations. Raising the AHF temperature had small effects on the penetration distance, and the SMD obviously decreased with increasing fuel temperature. The spray cone angle increased slightly, and the spray area decreased. The results showed that low-volatility AHF for safe and stable engine combustion could be achieved with air-assisted LPDI. Additionally, the efficient atomization of AHF can be effectively implemented through the combined adjustment of injection control and physical and chemical parameters.

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Effects of Low Pressure Injection on Fuel Atomization and Mixture Formation for Heavy Fuel Engines

et al. 2022

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The application of direct injection (DI) technology can effectively improve the atomization effect of heavy fuel to reduce the fuel loss of heavy fuel engines (HFE). The fuel spray characteristics directly affect the combustion performance of the engine. To investigate the atomization process and evaporation characteristics of heavy fuel in-cylinder for an air-assisted direct injection (AADI) engine, a simulation calculation model of AADI HFE was established with the use of a computational fluid dynamics tool. The air-assisted injector model and the one-dimensional performance calculation model were verified by test data. The influences of injection timing and injection pressure on the spray characteristics and mixture formation in the engine cylinder were discussed. The results show that the mixture concentration distribution is uniform after the injection timing is advanced, and the mass fraction of the fuel evaporation increases. The earlier injection timing can provide the fuel with sufficient time to evaporate, while the later injection timing will result in increasing the Sauter mean diameter (SMD) of the fuel droplets, and the unevaporated heavy fuel in the combustion chamber tends to become concentrated. With the increase in air injection pressure, the distribution of the mixed gas in the cylinder becomes uniform, and the SMD of the fuel droplets in the cylinder decreases. When the injection pressure is 0.65 MPa and 0.75 MPa, the difference between the SMD of the fuel droplets in-cylinder decreases, and a favorable fuel atomization effect can be maintained.

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Study of low load performance on a two-stroke direct injection spark ignition aero-piston engine fuelled with diesel

Cited by 3 publications

References 19 publications

The effects of E80D20 ethanol-diesel blend on combustion and exhaust emissions in SI engine

The effects of E80D20 ethanol-diesel blend on combustion and exhaust emissions in SI engine

Atomization Characteristics of Low-Volatility Heavy Fuel for Low-Pressure Direct Injection Aviation Piston Engines

Effects of Low Pressure Injection on Fuel Atomization and Mixture Formation for Heavy Fuel Engines

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