Investigations on the effect of measurement errors on estimated combustion and performance parameters in HCCI combustion engine

Maurya, Rakesh Kumar; Agarwal, Avinash Kumar

doi:10.1016/j.measurement.2012.05.021

Cited by 24 publications

(9 citation statements)

References 26 publications

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“…The important sources of error in the present experimental setup could be day-to-day variations; the compression ratio determination; determination of the air/fuel ratio (λ); and the cycle-to-cycle variation of combustion phasing [35]. Furthermore, the most important source of error is the extrapolation process.…”

Section: Hcci Numbersmentioning

confidence: 99%

“…IQT testing is a standardized test while the HCCI test -being quite new and not an established procedure -is prone to several sources of measurement errors [35]. The important sources of error in the present experimental setup could be day-to-day variations; the compression ratio determination; determination of the air/fuel ratio (λ); and the cycle-to-cycle variation of combustion phasing [35].…”

Section: Hcci Numbersmentioning

confidence: 99%

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Evaluation of Anti-Knock Quality of Dicyclopentadiene-Gasoline Blends

Al-Khodaier

Shankar

Waqas

et al. 2017

SAE Technical Paper Series

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Increasing the anti-knock quality of gasoline fuels can enable higher efficiency in spark ignition engines. In this study, the blending anti-knock quality of dicyclopentadiene (DCPD), a by-product of ethylene production from naphtha cracking, with various gasoline fuels is explored. The blends were tested in an ignition quality tester (IQT) and a modified cooperative fuel research (CFR) engine operating under homogenous charge compression ignition (HCCI) and knock limited spark advance (KLSA) conditions. Due to current fuel regulations, ethanol is widely used as a gasoline blending component in many markets. In addition, ethanol is widely used as a fuel and literature verifying its performance. Moreover, because ethanol exhibits synergistic effects, the test results of DCPDgasoline blends were compared to those of ethanol-gasoline blends. The experiments conducted in this work enabled the screening of DCPD auto-ignition characteristics across a range of combustion modes. The synergistic blending nature of DCPD was apparent and appeared to be greater than that of ethanol. The data presented suggests that DCPD has the potential to be a high octane blending component in gasoline; one which can substitute alkylates, isomerates, reformates, and oxygenates. IntroductionCarbon mitigation has motivated the development of downsized spark-ignited light duty engines while simultaneously turbocharging them. The energy requirement from light duty vehicle fleets is expected to decrease by almost 10% from 2014 to 2040 [1], due to engine efficiency gains and increased hybridization. The efficiency of spark ignited engines is connected to the fuel octane index (OI = RON -K*S), where RON is the research octane number, S is the octane sensitivity, and K is an empirical constant that depends on engine operating conditions [2]. Increasing the OI of a fuel would maximize tank-to-wheel carbon reductions [3]. However, refinery processes associated with increasing the fuel's anti-knock quality may have an adverse effect on well-to-tank efficiency and cost, depending on the composition of the blend stocks [4]. The use of renewable cellulosic-derived high octane gasoline blending components, such as ethanol, butanol, furans, or lignin-derived aromatics [5,6,7] are a potential solution to achieving high well-to-wheel efficiency, but significant technical, economical, and environmental challenges are slowing their progress to market.Another possible solution is to optimize the use of petroleum refinery-derived components to increase the anti-knock quality of gasoline. The present gasoline refining process consists of multiple processes -including cracking, alkylation, isomerization, and reformation -to modify the chemical composition of the light and heavy naphtha streams obtained from fractional distillation. The alkylation unit converts low value light compounds, such as isobutane, to higher octane gasoline compounds, mainly C7 and C8 compounds, such as 2,4-dimethylpentane and isooctane. In this unit, sulfuric or hydrofluoric acid...

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Section: Hcci Numbersmentioning

confidence: 99%

Section: Hcci Numbersmentioning

confidence: 99%

Evaluation of Anti-Knock Quality of Dicyclopentadiene-Gasoline Blends

Al-Khodaier

Shankar

Waqas

et al. 2017

SAE Technical Paper Series

View full text Add to dashboard Cite

show abstract

“…Our previous work [31,32] covers detailed explanation of the experimental setup; therefore, in this section, only brief description of the engine setup and experimental procedure is given. A four cyl inder diesel engine was modified and HCCI combustion was achieved in one of the four cylinders.…”

Section: E Xp Erim En Tal Setupmentioning

confidence: 99%

Combustion and Emission Characterization of n-Butanol Fueled HCCI Engine

Maurya

Agarwal

2014

Journal of Energy Resources Technology

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Com bustion and Em ission C haracterization of n-B utanol Fueled HCCI EngineBiofuels are attracting global attention as alternate transportation fuels due to advan tages of their being produced from locally available renewable resources, lower pollution potential, and biodegradable nature. Butanol is fast emerging as one of the competitive biofuels for use in transportation engines. Homogeneous charge compression ignition (HCCI) engines have shown great potential for higher engine efficiency and ultralow NOx and particulate matter (PM) emissions. This experimental study is therefore carried out to combine the advantages of biofuels and HCCI engines, both. Detailed perform ance, combustion, and emission characteristics of n-butanol fueled HCCI engine are investigated experimentally. The study is conducted on a four cylinder diesel engine, whose one cylinder was modified to operate in HCCI combustion mode. Port fuel injec tion technique was used for homogeneous charge preparation in the intake manifold. Auto-ignition of fuel in the engine cylinder was achieved by intake air preheat ing. In-cylinder pressure-crank angle data acquisition with subsequent heat release anal yses and exhaust emission measurements were done for combustion and emission characterization. In this paper, the effect of intake air temperature and air-fuel ratio on the combustion parameters, thermal and combustion efficiency, ringing intensity (RI), and emissions from n-butanol fueled HCCI engine were analyzed and discussed compre hensively. Empirical correlations were derived to fit the experimental data for various combustion parameters.

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“…22 On the one hand, in-cylinder pressure sampling is commonly performed crank angle based, as the pressure needs to be properly phased with the volume evolution for a precise HRR computation. 23 On the other hand, sufficient time resolution is required to differentiate resonance (around 5-25 kHz) from the normal combustion. 24 Because of that, an adequate sampling frequency resolution is achieved with five samples per degree (24 kHz at 800 rpm and 60 kHz at 2000 rpm).…”

Section: Introductionmentioning

confidence: 99%

In-cylinder pressure smart sampling for efficient data management

Plá

Morena

Bares

et al. 2022

International Journal of Engine Research

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The present paper proposes an optimized algorithm for minimizing the amount of data processed in order to maintain all critical information from the in-cylinder pressure sensor but with minimum computational cost. The algorithm uses singular value decomposition (SVD) for reducing the number of samples and pivoting QR decomposition to identify the optimal sampling locations. Experimental data from four engines with different combustion modes, namely Spark ignition (SI), Compression ignition (CI), turbulent jet ignition (TJI), and dual fuel ignition (DFCI), was used to validate the algorithm. The impact of the different sampling methodologies on different metrics for engine performance has been addressed and studied showing negligible information loss when reducing to 25 samples per cycle the acquisition buffer size.

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Investigations on the effect of measurement errors on estimated combustion and performance parameters in HCCI combustion engine

Cited by 24 publications

References 26 publications

Evaluation of Anti-Knock Quality of Dicyclopentadiene-Gasoline Blends

Evaluation of Anti-Knock Quality of Dicyclopentadiene-Gasoline Blends

Combustion and Emission Characterization of n-Butanol Fueled HCCI Engine

In-cylinder pressure smart sampling for efficient data management

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