Study on cycle-by-cycle variations in a diesel engine with dimethyl ether as port premixing fuel

Wang, Ying; Xiao, Fan; Zhao, Yuhong; Li, Dongchang; Xiong, Lei

doi:10.1016/j.apenergy.2014.12.079

Cited by 72 publications

(17 citation statements)

References 31 publications

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“…Cyclic variability in combustion can have a negative impact on exhaust emissions and engine performance parameters [77]. The reasons behind this instability could be due to different factors such as fuel properties, fuel injection timing and pressure, air/fuel mixture in premixed combustion phase, air-to-fuel ratio, in-cylinder mixture motion, engine operating condition and engine temperature [20,77,78]. There are different ways of presenting the combustion instability [79,80].…”

Section: Cyclic Variabilitymentioning

confidence: 99%

Emissions and performance with diesel and waste lubricating oil: A fundamental study into cold start operation with a special focus on particle number size distribution

Zare

Bodisco

Verma

et al. 2020

Energy Conversion and Management

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Section: Cyclic Variabilitymentioning

confidence: 99%

Emissions and performance with diesel and waste lubricating oil: A fundamental study into cold start operation with a special focus on particle number size distribution

Zare

Bodisco

Verma

et al. 2020

Energy Conversion and Management

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“…COV is a measurement of the event dispersion and frequently used indicator in the engine cyclic variation studies [34]. It can be computed by adhering to Eq.…”

Section: Cyclic Variation Equationsmentioning

confidence: 99%

“…Application of palm biodiesel in automotive diesel engines has increased the peak cylinder pressure variation [33]. Wang et al, stated that the quantity of alternative fuel (dimethyl ether) was directly proportional to the cyclic variation in diesel engines [34]. Ali et al, studied the effects of additive in B30 biodiesel blends.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Variation Analysis of Palm Biodiesel Fuel in Low Compression Marine Diesel Engine

Noor¹,

Mamat²,

Ali³

et al. 2020

ARFMTS

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Environmental pollution due to fossil fuel combustion has made biodiesel a viable option. Biodiesel fuel has been widely used in land-based vehicle engines, but it is limited to marine sectors. This study investigated the cyclic variations effect of palm biodiesel to determine combustion stability in low compression marine diesel engine. The time series of peak pressure and indicated mean effective pressure is examined using statistical and continuous wavelet transformation methods. The results show that the cyclic variations on marine engine operated with palm biodiesel are better than diesel, as indicated by lower COVpmax and COVIMEP values, which are below 1.29% and 2.50% respectively. Increase the percentage of palm biodiesel in blends has gradually reduced the COVIMEP and the B30 palm biodiesel blend produces the minimum cyclic variations of IMEP with 1.91%. This finding was agreed with the wavelet spectrum results which revealed that the B30 palm biodiesel blend has the lowest IMEP frequency oscillation. The B30 palm biodiesel blend has produced the most stable combustion among the tested fuels.

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“…The P max has "easy to measure" and "sensitive to cyclic variations" characteristics, so the coefficient of variation (COV) was analyzed to characterize the difference based on the published research [40,41]. COV was defined by using Equations (3)-(5); the linear dependence of relativity on peak in-cylinder pressure and combustion parameters (R(P max , y)) was measured in terms of the Pearson's correlation, as presented in Equation 6, where the mean value of in-cylinder pressure is expressed in P max , N is the total cycle number, i represents the cycle index, and σ P is the standard deviation [42][43][44]. A significant correlation was observed among parameters when R was in the range of 0.5-1.0.…”

Section: Cyclic Variation Characteristicsmentioning

confidence: 99%

Cycle-to-Cycle Variation of a Diesel Engine Fueled with Fischer–Tropsch Fuel Synthesized from Coal

et al. 2019

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Cycle-to-cycle variations during the combustion phase should be comprehensively investigated because these variations are among the most serious causes of higher emissions and lower efficiency. The main objective of this study was to evaluate the relationship between cyclic variations and combustion parameters. The combustion and cyclic variation characteristics were investigated using a diesel engine operating on Fischer–Tropsch (F–T) fuel synthesized from coal. Experiments were conducted under full load conditions at three engine speeds of 1200, 2000, and 2800 rpm. The results revealed that cyclic variations of F–T diesel were lower than those of 0# diesel, acquired the minimum value at the speed of 2000 rpm, and reached the maximum at the speed of 2800 rpm. The mean fluctuation intensity of F–T diesel was 0.185, 0.189, and 0.205 at speeds of 1200, 2000, and 2800 rpm, respectively, smaller than that of 0# diesel under the corresponding conditions. The relationships between cyclic variations and combustion parameters were analyzed by correlation methods. Maximum in-cylinder pressure (Pmax) increased linearly with increased ignition delay, while it decreased linearly with increased combustion duration. The Pearson’s correlations between Pmax and ignition delay were 0.75, 0.78, and 0.73; however, the corresponding values between Pmax and combustion duration were 0.61, 067, and 0.65 when fueled with F–T diesel at speeds of 1200, 2000, and 2800 rpm, respectively. Moreover, the Pearson’s correlations of 0# diesel were higher than those of F–T diesel at the same operating loads. Compared with combustion duration, the ignition delay had more important effects on cyclic variations with a higher Pearson’s correlation. Furthermore, the ignition delay significantly influenced cyclic variation under a high speed load, while the combustion duration had a marked effect under low speed conditions. Overall, the results revealed the importance of combustion parameters on cyclic variation, which has great significance for controlled cyclic variation in diesel engines.

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Study on cycle-by-cycle variations in a diesel engine with dimethyl ether as port premixing fuel

Cited by 72 publications

References 31 publications

Emissions and performance with diesel and waste lubricating oil: A fundamental study into cold start operation with a special focus on particle number size distribution

Emissions and performance with diesel and waste lubricating oil: A fundamental study into cold start operation with a special focus on particle number size distribution

Cyclic Variation Analysis of Palm Biodiesel Fuel in Low Compression Marine Diesel Engine

Cycle-to-Cycle Variation of a Diesel Engine Fueled with Fischer–Tropsch Fuel Synthesized from Coal

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