The autoignition of Liquefied Petroleum Gas (LPG) in spark-ignition engines

Morganti, Kai; Brear, Michael J.; Silva, Gabriel da; Yang, Yi; Dryer, Frederick L.

doi:10.1016/j.proci.2014.06.070

Cited by 44 publications

(21 citation statements)

References 24 publications

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“…Cylinder pressure traces of 300 cycles were obtained with a plug-type pressure transducer (AVL GU22C) mounted in the engine cylinder. Due to cycle-tocycle variation in IC engines, instead of cycle average, a representative pressure trace that is statistically most significant by minimizing the sum of squared errors (SSE) [36] based on CA50 is used throughout the paper. Cycle-to-cycle variations indicating combustion stability of engine experimental data is characterized by the coefficient of variation (COV) of IMEP defined as:…”

Section: Methodsmentioning

confidence: 99%

On the effects of fuel properties and injection timing in partially premixed compression ignition of low octane fuels

Naser

Jaasim

Atef

et al. 2017

Fuel

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Section: Methodsmentioning

confidence: 99%

On the effects of fuel properties and injection timing in partially premixed compression ignition of low octane fuels

Naser

Jaasim

Atef

et al. 2017

Fuel

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“…As an example, the size of the global natural gas vehicle fleet has increased by an order of magnitude over last decade [2]. Many developing countries, such as Argentina, China, India, Iran and Pakistan have experienced major growth in natural gas and liquefied petroleum gas (LPG) vehicles, with many projections suggesting future growth will be even more rapid [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Dual-fuel operation of gasoline and natural gas in a turbocharged engine

Singh

Morganti

Dibble

2019

Fuel

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Natural gas is a high-octane fuel that produces lower CO 2 emissions per kilowatt hour than liquid transport fuels, with essentially zero sulfur emissions. Historically, natural gas has mostly been used in power generation and industrial applications. However, there has been a recent shift towards employing natural gas in the transport sector. In many developing countries, existing vehicles are retrofitted with compressed natural gas (CNG) systems, enabling operation on both gasoline and natural gas (and theoretical mixtures thereof). This work examines the effect of leveraging the secondary natural gas fuel system on the performance, efficiency and broader environmental impact of a high specific output gasoline engine. Firstly, mixture sweeps are presented for varying gasoline/natural gas ratios (100% gasoline to 100% natural gas) at wide open throttle (WOT) with both fixed and variable spark timing. This baseline information is then used to optimize the engine calibration for varying gasoline/natural gas ratios over a wider range of operating conditions. Finally, the CO 2-equivalent emissions are computed to elucidate the broader environmental impact of an optimized gasoline/natural gas vehicle. This study suggests that more advanced control systems which enable vehicles to use both gasoline and natural gas simultaneously may provide a range of social, economic and environmental benefits.

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“…Prior to the imposition of electric field, the combustion reaction occurred at elevated temperatures above the propane's auto ignition temperature. The impact of field catalyzed reaction demonstrated at an applied voltage of 50 volts yield combustion of propane fuel at 500K below its auto-ignition temperature estimated as 734K [28], [29], [30]. The thermal enhancement is responsible for optimization of the combustion process due to electric field and geometric alterations of the flow confinements.…”

Section: Resultsmentioning

confidence: 99%

Auto-ignition performance of an electrified microreactor with constructal geometries

2020

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Common techniques employed to minimize ignition energy of gaseous fuels in micro reactors such as the use of catalyst are being plagued with setbacks. This report demonstrates the use of electric field to sustain combustion, minimize heat loss and enhance reactant mixing in microchannels of varying geometries. We set two defining constructal parameters for serpentine and straight microchannels of 0.05 to 0.25 to investigate geometric effect on the mixing of the reactants. Inlet concentration of propane and oxygen was set at 0.15 mol/dm 3 and 0.7 mol/dm 3 respectively. Reynolds numbers 400, 470, 530, 600 and 670 corresponding to inlet velocities of 0.06 m/s, 0.07 m/s, 0.08 m/s, 0.09 m/s and 0.1 m/s were used in the straight channel to study the dependence of reaction rate, temperature drop and reactants diffusion on the combustion process. We report that at an inlet temperature of 500 K which was below the propane's auto ignition temperature of 743 K, the reaction could occur in the presence of a 50 V applied voltage. Increasing constructual parameter (β) yielded an increase in reaction rate and a decrease in temperature drop. At the same constructual parameter, the serpentine geometry displayed a better result with the peak reaction rate of 894 mol/m 3 s. More so, increase in the Reynolds number and shape factor for the two geometries led to an increase in reaction rate and propane consumption. These findings could be suitably beneficial to provide minimal fuel requirement for miniaturized vehicles and micro-heat engines.

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The autoignition of Liquefied Petroleum Gas (LPG) in spark-ignition engines

Cited by 44 publications

References 24 publications

On the effects of fuel properties and injection timing in partially premixed compression ignition of low octane fuels

On the effects of fuel properties and injection timing in partially premixed compression ignition of low octane fuels

Dual-fuel operation of gasoline and natural gas in a turbocharged engine

Auto-ignition performance of an electrified microreactor with constructal geometries

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