Experimental study on the cyclic variations of ethanol/diesel reactivity controlled compression ignition (RCCI) combustion in a heavy-duty diesel engine

Pan, Suozhu; Cai, Kai; Cai, Min; Du, Chenbo; Li, Xin; Han, Weiqiang; Wang, Xin; Liu, Daming; Wei, Jiangjun; Fang, Jia; Bao, Xiuchao

doi:10.1016/j.energy.2021.121614

Cited by 34 publications

(5 citation statements)

References 80 publications

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“…Ecological pollution and the world energy crisis force investigators to fnd renewable, hygienic energy sources and advanced combustion technologies [1]. Many advanced lowtemperature combustion (LTC) technologies, such as HCCI [2], PCCI [3], PPCI [4], and RCCI [5,6], respectively, have been proposed to improve the combustion efciency and reduce emissions of internal combustion engines. Te RCCI combustion, which belongs to the dual-fuel mode, regulates the ratio of two fuels with diferent reactivity, of which one is injected through the port and the other is directly injected to control the ignition and combustion process [7].…”

Section: Introductionmentioning

confidence: 99%

Response Analysis of an Experimental Study on the Effect of Speed and Premixed Fuel Ratio on Performance and Emissions in RCCI Engine

Disassa,

Ancha,

Nallamothu

et al. 2024

International Journal of Chemical Engineering

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Even though CI engines are more efficient than SI engines due to their ability to operate at a greater compression ratio, a leaner charge, and lower throttle losses, they have higher PM and nitrogen oxide emissions. The induction system modification with fuel port injection is used as a parameter in RCCI engine operations for controlling emission through in-cylinder charge reactivity and combustion phasing. By varying the amount of hydrous bioethanol in the premixed fuel injection ratio, the engine’s performance and emissions are greatly affected. In this study, an experimental investigation of a triple-fuel RCCI engine running on port-injected gasoline-bioethanol blend and direct-injected diesel fuel was conducted. Taguchi’s experimental design method was employed to assess the impact of various independent variables utilizing three set levels and two factors with the L9 orthogonal array. From the findings, the delta value shows the highest average response for each factor. Engine speed has the largest effect on the signal-to-noise ratio (SNR) with the (delta value of: 10.7446, rank = 1), and the delta value of 38.96, rank = 1, has the largest effect on the response of means at engine speeds of 3000 rpm. The premixed fuel ratio of G25BE75 (delta: 87.30, rank = 1) has the largest effect on the standard deviation. The lines are not parallel in all emission and performance cases except for Tb and CO2, which are close to parallel. The best means in engine speed and premixed blended fuel ratio were NOx, CO, HC, and brake power. At 3000 rpm, the speed had the larger main effect plots of SNR. The premixed fuel ratio of G25BE75 had higher main effect plots for means and standard deviations. The residues appear to have been dispersed normally based on a straight line by using a normal probability plot. The data are normally distributed, as demonstrated by the normal probability plot, and the factors had an impact on the response. Conferring to the experiment result, a high engine speed and higher ethanol content in the RCCI premixed fuel are preferred for reducing nitrogen oxides (NOx) and carbon dioxide (CO2), while unburned hydrocarbons (UHCs) and carbon monoxide (CO) showed a slight increase.

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Section: Introductionmentioning

confidence: 99%

Response Analysis of an Experimental Study on the Effect of Speed and Premixed Fuel Ratio on Performance and Emissions in RCCI Engine

Disassa,

Ancha,

Nallamothu

et al. 2024

International Journal of Chemical Engineering

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“…38,39 Several researchers have conducted RCCI simulations and experimentation using port-injection of low-reactivity fuel and direct-injection of high-reactivity fuel. 13,[40][41][42][43] In comparison to conventional diesel combustion (CDC), RCCI produces ultralow NO X and soot levels, but a substantial proportion of unburned hydrocarbon (UHC) and carbon monoxide (CO). LTC techniques have a lot of chemical kinetics, which limits their ability to regulate how quickly and how long heat is released.…”

Section: Introductionmentioning

confidence: 99%

Statistical analysis of ethanol/diesel dual-fuel combustion of compression ignition engines in RCCI mode using multi-injection strategies

Elbanna

Cheng

Chao

et al. 2023

Sustainable Energy Fuels

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“…In addition, during advanced combustion, NO x emissions increase and soot emissions reduce due to the higher pressure and temperature in the cylinder, which leads to soot oxidation [31]. Pan et al [35] showed that the cyclic variations of ethanol/diesel dual-fuel combustion are sensitive to the diesel injection timing. With the increase in diesel injection timing, the coefficient of the variations (COVs) of all parameters decreases at first and then increases; and the distribution ranges of the crank angle of the maximum in-cylinder pressure (p max ), the maximum heat release rate (HRR max ), and the maximum PRR (PRR max ) are narrowed firstly and then widened.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pilot Injection Strategy on Performance of Diesel Engine under Ethanol/F-T Diesel Dual-Fuel Combustion Mode

Yang,

Chen,

Liu

et al. 2023

Processes

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To reduce emissions and save energy, alternative fuel and dual-fuel mode have been widely applied in the field of diesel engines. The pilot injection has potential to reduce engine vibration noise and pollutant emissions. The effects of a diesel fuel pilot injection strategy on the performance of an ethanol/F-T diesel dual-fuel engine were experimentally investigated on a four-cylinder four-stroke common rail diesel engine modified with an ethanol injection system. The results indicate that the variation in the combustion characteristic parameters with pilot injection timing is nonlinear and the difference is small, while soot, NOx, and CO tend to decrease, with an increase in pilot injection timing. With the increase in pilot injection amount, pmax, combustion duration, CO and soot increased; pmax phase and CA50 were closer to TDC; HRRmax and the ignition delay period decreased. The BSFC tends to increase with the increase in pilot injection timing and the increase in pilot injection amount, while the BTE shows the opposite trend. The value and the variation range of COVpmax are small. The effect of the pilot injection amount on ethanol/F-T diesel dual-fuel engine is more significant. The research presented in this paper can provide reference directions for the formulation of a fuel injection strategy of ethanol/F-T diesel dual-fuel combustion mode to reduce NOx without worsening the combustion process and presenting an insufficient fuel economy.

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Experimental study on the cyclic variations of ethanol/diesel reactivity controlled compression ignition (RCCI) combustion in a heavy-duty diesel engine

Cited by 34 publications

References 80 publications

Response Analysis of an Experimental Study on the Effect of Speed and Premixed Fuel Ratio on Performance and Emissions in RCCI Engine

Response Analysis of an Experimental Study on the Effect of Speed and Premixed Fuel Ratio on Performance and Emissions in RCCI Engine

Statistical analysis of ethanol/diesel dual-fuel combustion of compression ignition engines in RCCI mode using multi-injection strategies

Effect of Pilot Injection Strategy on Performance of Diesel Engine under Ethanol/F-T Diesel Dual-Fuel Combustion Mode

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