A spectroscopy study of gasoline partially premixed compression ignition spark assisted combustion

Pastor, Javier; García-Oliver, José M; García, Antonio; Micó, Carlos; Durrett, Russell

doi:10.1016/j.apenergy.2012.11.030

Cited by 48 publications

(20 citation statements)

References 24 publications

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“…However, the concept demonstrated difficulties at low load conditions using gasoline with octane number (ON) greater than 90 [15] [16]. In this sense, the spark assistance provided temporal and spatial control over the gasoline PPC combustion process [17][18] [19], but resulted in unacceptable NOx and soot emissions [20], even using double injection strategies [21] [22].…”

Section: Homogeneous Charge Compression Ignition (Hcci) a Widely Invmentioning

confidence: 99%

An experimental investigation on the influence of piston bowl geometry on RCCI performance and emissions in a heavy-duty engine

Benajes

Pastor

García

et al. 2015

Energy Conversion and Management

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This experimental work investigates the effects of piston bowl geometry on RCCI performance and emissions at low, medium and high engine loads. For this purpose three different piston bowl geometries with compression ratio 14.4:1 have been evaluated using single and double injection strategies. The experiments were conducted in a heavy-duty single-cylinder engine adapted for dual fuel operation. All the tests were carried out at 1200 rev/min.Results suggest that piston geometry has great impact on combustion development at low load conditions, more so when single injection strategies are used. It terms of emissions, it was proved that the three geometries enables ultra-low NOx and soot emissions at low and medium load when using double injection strategies. By contrast, unacceptable emissions were measured at high load taking into account EURO VI limitations. Finally, the application of a mathematical function considering certain selfimposed constraints suggested that the more suitable piston geometry for RCCI operation is the stepped one, which has a modified transition from the center to the squish region and reduced piston surface area than the stock geometry.

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Section: Homogeneous Charge Compression Ignition (Hcci) a Widely Invmentioning

confidence: 99%

An experimental investigation on the influence of piston bowl geometry on RCCI performance and emissions in a heavy-duty engine

Benajes

Pastor

García

et al. 2015

Energy Conversion and Management

View full text Add to dashboard Cite

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“…With the aim of improving the PPC cycle-to-cycle control at low loads using high ON gasolines, PPC spark assisted concept has been studied [12] [13]. It has been demonstrated that the spark assistance provides temporal and spatial control over the combustion process [14], however the high local reactivity required between the spark plug electrodes at the start of spark timing and the flame propagation process result in an unacceptable NOx and soot emissions [15].…”

Section: Introductionmentioning

confidence: 99%

Effects of direct injection timing and blending ratio on RCCI combustion with different low reactivity fuels

Benajes

Molina

García

et al. 2015

Energy Conversion and Management

154

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ElsevierBenajes Calvo, JV.; García Martínez, A.; Monsalve Serrano, J. (2015). Effects of direct injection timing and blending ratio on RCCI combustion with different low reactivity fuels. Energy Conversion and Management. 99:193-209. doi:10.1016/j.enconman.2015.04.046. Effects of Direct injection timing and Blending Ratio on RCCI combustion with different Low Reactivity FuelsEnergy Conversion and Management, Volume 99, 2015, Pages 193-209. http://dx.doi.org/10.1016/j.enconman.2015 AbstractThis work investigates the effects of the direct injection timing and blending ratio on RCCI performance and engine-out emissions at different engine loads using four low reactivity fuels: E10-95, E10-98, E20-95 and E85 (port fuel injected) and keeping constant the same high reactivity fuel: diesel B7 (direct injected). The experiments were conducted using a heavy-duty single-cylinder research diesel engine adapted for dual-fuel operation. All the tests were carried out at 1200 rpm. To assess the blending ratio effect, the total energy delivered to the cylinder coming from the low reactivity fuel was kept constant for the different fuel blends investigated by adjusting the low reactivity fuel mass as required in each case. In addition, a detailed analysis of the air/fuel mixing process has been developed by means of a 1-D in-house developed spray model.Results suggest that notable higher diesel amount is required to achieve a stable combustion using E85. This fact leads to higher NOx levels and unacceptable ringing intensity. By contrast, EURO VI NOx and soot levels are fulfilled with E20-95, E10-98 and E10-95. Finally, the higher reactivity of E10-95 results in a significant reduction in CO and HC emissions, mainly at low load.

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“…In PCCI or PPCI derived from HCCI, the end point of fuel injection and the start point of combustion are separated for preferred control over the start of combustion and better fuel-air premixed state at the beginning of combustion [14]. References [15][16][17][18] conducted numerical simulation or experimental study on PPCI combustion.…”

Section: Introductionmentioning

confidence: 99%

Identifying Unregulated Emissions from Conventional Diesel Self-Ignition and PPCI Marine Engines at Full Load Conditions

Wang

Han³

et al. 2020

JMSE

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A study on unregulated emissions of a conventional diesel self-ignition and partial premixed compression ignition (PPCI) marine engine at full load condition was performed, respectively. In this work, PPCI was realized in a marine engine by blending 15% diesel with 85% light hydrocarbons (LHC). Gas chromatography-mass spectrometry (GC-MS) was used to detect and identify unregulated emissions, and the chemical formula and peak area of representative species were obtained. Furthermore, the unregulated emissions were classified and semi-quantitatively analyzed. The results show that the maximum in-cylinder pressure of PPCI is almost 11 bar lower than that of conventional diesel combustion, and the crank angle at that moment is also delayed by 2 • CA. Compared to conventional diesel combustion, the maximum pressure rise rate of PPCI is reduced by 3.5%, while the maximum heat release rate of PPCI increases by 23.5%. Further, PPCI produces fewer species in unregulated emissions, and their chemical formula are less complex than that of conventional diesel combustion. Compared to conventional diesel combustion, the relative concentration of alkane and organic components in PPCI decreases significantly, while ketone and ester increase.

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A spectroscopy study of gasoline partially premixed compression ignition spark assisted combustion

Cited by 48 publications

References 24 publications

An experimental investigation on the influence of piston bowl geometry on RCCI performance and emissions in a heavy-duty engine

An experimental investigation on the influence of piston bowl geometry on RCCI performance and emissions in a heavy-duty engine

Effects of direct injection timing and blending ratio on RCCI combustion with different low reactivity fuels

Identifying Unregulated Emissions from Conventional Diesel Self-Ignition and PPCI Marine Engines at Full Load Conditions

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