Knock characteristics of SI engine fueled with n-butanol in combination with different EGR rate

Wei, Haiqiao; Feng, Dengquan; Pan, Jiaying; Shao, Aifang; Pan, Mingzhang

doi:10.1016/j.energy.2016.11.134

Cited by 58 publications

(17 citation statements)

References 29 publications

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“…This study used the probability distribution to assess the knock intensity variation. Wei et al [115] tried to understand the effect of Exhaust Gas Recirculation (EGR) on knocking combustion behaviours of n-butanol as well as the sensitivity of n-butanol knocking phenomena to intake pressure and compression ratio. The results showed that EGR, due to cooling and dilution effects, could decrease knock intensity and delay knock start timing.…”

Section: Knock Phenomenamentioning

confidence: 99%

Improved Performance, Combustion and Emissions of SI Engine Fuelled with Butanol: A Review

Veza¹,

Said²,

Latiff³

2020

IJAME

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Several studies on ethanol as a biofuel have been comprehensively carried out. Today, a growing interest in longer chain alcohols has emerged due to their favourable physical and thermodynamic properties. Butanol or butyl alcohol with 4-carbon structure (C4H9OH) is a more promising biofuel as it outweighs methanol and ethanol in several ways. The production cost of butanol has been gradually reduced, and rapid progress in the development of its production technology has allowed butanol to be produced more effectively. However, studies on the effect of butanol on gasoline or spark ignition (SI) engines are not as comprehensive as the abundant research of ethanol. This paper highlights recent novelty and contribution of butanol addition in SI engine. Results of new approaches on the engine’s performance, combustion and emission characteristics are summarised. Reviews from this paper suggest that there are some gaps in the addition of butanol found in the literature. Thus, several encounters and forthcoming research directions are outlined in the final section of this review article, highlighting several possible contributions that have not yet been carried out using butanol as a biofuel in a gasoline engine.

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Section: Knock Phenomenamentioning

confidence: 99%

Improved Performance, Combustion and Emissions of SI Engine Fuelled with Butanol: A Review

Veza¹,

Said²,

Latiff³

2020

IJAME

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“…Many researches pointed out that knock frequencies were observed in the range of 4-20 kHz [24,25]. But the super-knock generally causes high-frequency oscillations.…”

Section: Knock and Super-knock Criteriamentioning

confidence: 99%

“…The phenomenon of knock 22 seriously limits the improvement of thermal efficiency of SI engines. 23 At present, many experimental and numerical investigations have been conducted to investigate the 24 fundamental mechanism of knock by various devices such as optical engine [4], rapid compression machine [5], 25 optical constant volume bomb [6]. Meanwhile, various methods was adopted to suppress the knock occurrence 26 such as Miller cycle [7], exhaust gas recirculation (EGR) [8] and alternative fuels [9].…”

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confidence: 99%

Experimental analysis of super-knock occurrence based on a spark ignition engine with high compression ratio

Zhou

Kang

Wei

et al. 2018

Energy

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“…The pseudo-binary gasoline+alcohol mixtures were prepared at room temperature for various volume fractions, in order to cover the entire composition range. 3 ) 0.7919 0.8034 0.7909 [13] 0.7950 [14] 0.7851 0.7855 [15] 0.7853 [16] 0.8102 0.8101 [17] 0.8097 [13] Dynamic viscosity at 40 o C (mPa•s) 0.3673 0.9081 0.829 [18] 0.837 [19] 1.3236 1.3470 [16] 1.3500 [20] 1.7769 1.7696 [21] Refractive index at 20 o C 1.4520 1.3624 1.362 [22] 1.3766 1.3750 [23] 1.3752 [24] 1.3991 1.3950 [22] 1.3991 [25] The experimental uncertainty in volume fraction was estimated to be less than ±0.002. The mixtures were prepared in airtight narrow-mouth ground glass stoppered bottle, in order to minimize the evaporative losses.…”

Section: Methodsmentioning

confidence: 99%

Study of the refractive index of gasoline+alcohol pseudo-binary mixtures

Nita

Geacai

Iulian

et al. 2017

Ovidius University Annals of Chemistry

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Abstract. The properties of gasoline change as a result of blending with a bioalcohol, affecting the behavior of the pseudo-binary system. The aim of this paper is to present experimental data of the refractive index for pseudobinary mixtures of a reformate gasoline with ethanol, isopropanol and n-butanol over the entire composition range and for temperature ranging from 293.15 K to 313.15 K. The accuracy of different equations to predict the refractive index of the mixtures was tested. The best prediction accuracy (the lower AAD) corresponded to Eykman and Lorentz-Lorenz mixing rules. A logarithmic equation proposed to correlate the refractive index with composition and temperature of gasoline+alcohol mixtures showed a good accuracy (the absolute average deviation AAD < 0.052%). The deviations in refractive index for investigated systems are negative over the entire composition range and at all investigated temperatures.

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Knock characteristics of SI engine fueled with n-butanol in combination with different EGR rate

Cited by 58 publications

References 29 publications

Improved Performance, Combustion and Emissions of SI Engine Fuelled with Butanol: A Review

Improved Performance, Combustion and Emissions of SI Engine Fuelled with Butanol: A Review

Experimental analysis of super-knock occurrence based on a spark ignition engine with high compression ratio

Study of the refractive index of gasoline+alcohol pseudo-binary mixtures

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