Engine performance, exhaust emission and combustion analysis of a 4-stroke spark ignited engine using dual fuel injection

Ramasamy, D.; Goh, C.Y.; Benedict, Faye; Noor, M. M.; Najafi, G.; Carlucci, Antonio Paolo

doi:10.1016/j.fuel.2017.06.065

Cited by 21 publications

(11 citation statements)

References 23 publications

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“…At a BMEP of 3 bar and 2000 rpm, the ignition advance for both fuels were 20 • CA in the stoichiometric mixture, whereas in the lean mixture (λ = 1.6) it was 34 • and 42 • CA for CNG and gasoline, respectively. It is declared in the literature that the gasoline needs a shorter spark advance than CNG in the same operating condition [12,14]. However, the spark advance values obtained in this study do not support these results.…”

Section: Combustion Analysiscontrasting

confidence: 95%

“…Engines used in studies which are concerned with CNG in the literature are designed for gasoline and have low compression ratio [7,12,19]. In this study, contrary to some studies that are mentioned above, the spark advance and ignition delay durations were shorter for both fuels.…”

Section: Introductionmentioning

confidence: 59%

“…For example, at a BMEP of bar and 1500 rpm, the ignition delay duration was 5 • CA for both fuels in the stoichiometric condition, whereas it was 11 • CA and 16 • CA for CNG and gasoline in lean mixture, respectively. However, this period is defined as longer for CNG in the stoichiometric conditions by some researchers [6,7,12]. The main reason for this contrast is structural differences between the experimental engines.…”

Section: Combustion Analysismentioning

confidence: 99%

“…Some studies lay emphasis on further NOx reduction in stoichiometric mixture in a CNG-fueled engine. The primary reason for high levels of NOx is longer ignition advance in CNG engines compared to gasoline in same conditions [11,12]. Some research has proven the longer combustion time of CNG (CA for 10-90%) working in the same conditions.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Burn Duration and NO Emission in Lean Mixture with CNG and Gasoline

et al. 2019

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The results of experiments performed by gasoline and natural gas fuels in a single cylinder research engine were evaluated in this study. The main objective of this study is to compare exhaust gas emissions, efficiency, and burn durations for both fuels in stoichiometric and lean mixture. At the same time, cycle to cycle variation in these operating conditions should not exceed an acceptable value. In the ultra-lean mixture, gasoline fuel exceeded this determined limit before Compressed Natural Gas (CNG). Therefore, the reduction in NO was restricted by cyclic variations. In combustion analysis, although the burn duration of the gasoline in stoichiometric conditions was shorter than CNG, this situation reversed in favor of CNG in the ultra-lean mixtures. Contrary to some studies in the literature, the spark advance and ignition delay for CNG were the same or shorter than gasoline in this study. The primary reasons for this change are the high compression ratio and the different combustion chamber geometry. The increase in turbulence intensity has different effects on CNG and gasoline. As a result, it has been observed that NO emissions can meet the limits without a loss of efficiency for this engine operated with CNG under the ultra-lean mixture.

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Section: Combustion Analysiscontrasting

confidence: 95%

Section: Introductionmentioning

confidence: 59%

Section: Combustion Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of Burn Duration and NO Emission in Lean Mixture with CNG and Gasoline

et al. 2019

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“…A higher expansion ratio due to high compression ratios in diesel engines leaves low thermal energy to the exhaust, resulting in low fuel consumption and high power output [1,2]. However, diesel engines produce higher levels of nitrogen (NOx) oxides and particulate matter (PM) or soot as compared to their counterpart spark ignition (SI) engines [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effective abatement of diesel engine emissions with split injections

Ravichettu¹,

Rao²,

Murthy³

2017

Int. J. Automot. Mech. Eng.

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High fuel efficiency with good fuel economy and low carbon monoxide and hydrocarbon emissions are the essential features that are widely used in light, medium and heavy duty applications. However, high emissions of nitrogen (NOx) oxides and particulate matter (PM) is a major challenge and sometimes perplexing. Researchers have tackled the issues on multi-cylinder engines by adopting the common rail fuel injection systems which employs a multiple injection technique. The present work aims at utilising this for a single cylinder diesel engine. To study its efficacy, a numerical analysis by developing a quasidimensional computational model and coupled with thermodynamic considerations to model heat release rates and emissions of NOx and soot. For this purpose, a computer code was developed in C ++ and validated with the experimental results. Then a split technique was incorporated into the model. It is noted that for a case of 75 (8)

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