Effect of EGR routing on efficiency and emissions of a PPC engine

Dimitrakopoulos, Nikolaos; Belgiorno, Giacomo; Tunér, Martin; Tunestål, Per; Blasio, Gabriele Di

doi:10.1016/j.applthermaleng.2019.02.108

Cited by 36 publications

(11 citation statements)

References 23 publications

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“…could give a potential boost to the CI engine fuel economy and engine-out emissions reduction [27,28]. In fact, the research and industry are working extensively on fuel design and advanced combustion concepts to improve the CO 2 and improving the NOx-Soot trade-offs [29].…”

Section: Biodieselmentioning

confidence: 99%

Fuel Injection Responses and Particulate Emissions of a CRDI Engine Fueled with Cocos nucifera Biodiesel

et al. 2021

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The objective of this paper is to study the effect of coconut oil biodiesel (COB)-diesel blends on exhaust particulate matter (PM) emissions and fuel injection responses in an unmodified turbocharged four-stroke common-rail direct injection (CRDI) diesel engine. Characterization of COB and their blends has been conducted to ascertain the applicability of these fuels for the existing engine. The test fuels used were fossil diesel fuel, COB10, COB20, COB30 and COB50 of biodiesel-diesel fuels. A test cycle which composed of 16 different steady-state modes at various loads and speed conditions was followed. Generally, the results showed a marginally advanced SOI timing and longer injection duration with increasing COB blends at higher load as compared to diesel fuel. Additionally, the lower calorific value (CV) and higher viscosity of the COB fuel blends have resulted in reduced turbo boost pressure and increased common-rail fuel injection pressure, respectively, across all engine speeds and loads. On the aspects of PM emissions characterization, results indicated that the blending of COB with conventional diesel had benefits over diesel in PM reduction. In fact, the largest achievable PM mass reduction of 38.55% was attained with COB50. In addition, it was noticed that the size of PM particles accumulated such that the granular size increased with higher diesel content in the blend. Additionally, the composition analysis on the PM collected by EDX spectroscopy has revealed that the C, O and Si as three main elements that made up the PM particles in descending order. Overall, the results indicated that COB biodiesel is a clean-burning alternative fuel and can be used satisfactorily in an unmodified diesel engine without the needs for engine remapping.

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Section: Biodieselmentioning

confidence: 99%

Fuel Injection Responses and Particulate Emissions of a CRDI Engine Fueled with Cocos nucifera Biodiesel

et al. 2021

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“…By applying EGR, the exhaust gas displaces the fresh air entering the combustion chamber as a consequence the ambient gas composition is altered. It was recently reported that to achieve high gross indicated efficiency in GCI engines, high EGR up to 50% is used [18]. This indeed demonstrates that there is a need for understanding the spray penetration behavior under different ambient gas compositions.…”

Section: Introductionmentioning

confidence: 97%

Experimental and analytical study on liquid and vapor penetration of high-reactivity gasoline using a high-pressure gasoline multi-hole injector

Mohan

Sim

et al. 2019

Applied Thermal Engineering

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Penetration lengths for high-pressure GCI injector and GCI fuel were studied. • Liquid penetration length was longer under high EGR condition. • Penetration length regression models showed good agreement with experiments. A R T I C L E I N F O Keywords:Fuel spray High reactivity fuel Penetration correlation Liquid and vapor phase A B S T R A C T Spray penetration length is an important parameter which is of great interest to both experimentalists and modelers. As it affects engine efficiency and emissions, measurement and prediction of spray penetration can significantly benefit engine optimization under various operating conditions. In this study, penetration length was investigated in a pre-burn constant volume combustion chamber using a gasoline multi-hole injector with high reactivity gasoline-like fuel designed explicitly for gasoline compression ignition (GCI) engines. Diffused back illumination (DBI) and shadowgraph were implemented for liquid and vapor phase penetration measurements, respectively. Different pre-burn gas mixtures are compared to investigate the influence of ambient gas properties on gasoline spray penetration under evaporating conditions. The liquid penetration under the gas composition of higher molecular weight tends to be longer. However, the vapor penetration showed insignificant effect under different gas compositions. Ambient gas temperature and gas composition were found to be an essential parameter for liquid phase penetration. Pressure difference was found to affect the vapor penetration length while its influence on liquid phase steady state penetration length at high ambient gas temperature is marginal. Statistical analysis was performed for both liquid and vapor phase penetration lengths, and a prediction model was developed with good agreement to the data under all test conditions.

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“…In the transport sector, the vast majority of propulsion systems are still internal combustion engines. Within their development, many advanced works related to the improvement of the combustion process are carried out, including improvement of the fuel injection process, including DI [2,3] and optimization of EGR parameters [4]. The aspect of fuels is also important, which has been broadly presented in the literature [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Harmful Exhaust Gas Concentrations in Cloud behind a Vehicle with a Spark Ignition Engine

et al. 2021

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The article presents issues related to the assessment of concentrations of harmful substances in the exhaust gas cloud behind the vehicle. In the theoretical part, considerations about the harmfulness of exhaust gases and methods of detection of chemical compounds were made, and the issues of von Karman vortices and the Lambert-Beer law were referred to. The test object was a vehicle equipped with an SI engine meeting the Euro 3 standard. The drive unit had a capacity of 2.8 dm3, a rated power reaching 142 kW at 5500 rpm and a maximum torque of 280 Nm at 3500 rpm. The measurements of the dilution of the exhaust gas cloud behind the vehicle were made in stationary conditions (laboratory) and during actual operation in the Poznań agglomeration. In the research, technically advanced equipment from the PEMS group was used. In the analysis of the obtained results, detailed considerations were made regarding the influence of the location of the measuring probe in relation to the exhaust system. As can be seen from the obtained dependencies, the vehicle motion is favorable for the assessment of concentrations behind a moving object, because the ecological indicators at successive distances behind the exhaust system achieve better parameters in most points than in a stationary test.

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Effect of EGR routing on efficiency and emissions of a PPC engine

Cited by 36 publications

References 23 publications

Fuel Injection Responses and Particulate Emissions of a CRDI Engine Fueled with Cocos nucifera Biodiesel

Fuel Injection Responses and Particulate Emissions of a CRDI Engine Fueled with Cocos nucifera Biodiesel

Experimental and analytical study on liquid and vapor penetration of high-reactivity gasoline using a high-pressure gasoline multi-hole injector

Analysis of Harmful Exhaust Gas Concentrations in Cloud behind a Vehicle with a Spark Ignition Engine

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