Study about the link between injection strategy and knock onset in an optically accessible multi-cylinder GDI engine

Marseglia, Guido; Costa, Michela; Catapano, Francesco; Sementa, Paolo; Vaglieco, Bianca Maria

doi:10.1016/j.enconman.2016.12.012

Cited by 54 publications

(33 citation statements)

References 39 publications

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“…m smokes C p _smokes_8_8 (T 8 − T 8 ) = . m H20 UT 2 C p H20 T H20 UT 2out − T H20 UT 2in (8) The heat specific value of water C p H20 = 4.186 kJ kg K is considered as constant. From this equation, the values of .…”

Section: The Proposed Energy Plant Configurationmentioning

confidence: 99%

“…Actually, biomass combustion is one of the fundamental technologies followed for bioenergy [6,7]. For these reasons, gasification is considered a fundamental process to achieve an homogeneous gaseous fuel that presents good thermochemical combustion aspects, as knock 2 of 17 tendency [8] and flame front speed respect to fossil fuels, and that could be employed, subsequently the specific gas cleaning operations, as fuel in internal combustion engines or gas turbines [9].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Tests and Modeling on a Combined Heat and Power Biomass Plant

et al. 2019

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Renewable energy sources can help the countries to achieve some of the Sustainable Development Goals (SDGs) provided from the recent 2030 Agenda, allowing for clean, secure, reliable and affordable energy. Biomass technology is a relevant renewable energy to contribute to reach a clean and affordable energy production system with important emissions reduction of greenhouse gases (GHG). An innovative technological application of biomass energy consisting of a burner coupled with an external fired gas turbine (EFGT) has been developed for the production of electricity. This paper shows the results of the plant modelling by Aspen Plus environment and preliminary experimental tests; the validation of the proposed model allows for the main parameters to be defined that regulate the energy production plant supplied by woodchips.

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Section: The Proposed Energy Plant Configurationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Tests and Modeling on a Combined Heat and Power Biomass Plant

et al. 2019

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“…The impact of energy conversion processes on the environment has been increasingly relevant, because of the growing awareness of the effects of climate change on human living. In particular, the optimization of performance and the reduction of pollutant emissions from internal combustion engines have become important priorities, as a consequence of the spreading concern about the availability of fossil fuel reserves, and more and more stringent regulations on vehicle emissions at homologation [1].…”

Section: Introductionmentioning

confidence: 99%

“…In fact, while some zero-emission technologies are under investigation and development [2], internal combustion engines will continue being the most diffused powertrains for cars in the near future. A good balance between the reduction of fuel consumption and the improvement of performance is, today, the fundamental goal in both the spark ignition (SI) or compression engine (CI) engine [1], [3]- [5]. Parameters such as inlet pressure and temperature, spark timing, compression ratio, equivalence ratio and exhaust gas recirculation (EGR) are strongly linked to energetic engine efficiency.…”

Section: Introductionmentioning

confidence: 99%

Energy Efficiency in Gasoline Direct Injection Engines

Marseglia

Medaglia

2018

WIT Transactions on the Built Environment

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The growing awareness about the environmental impact of human activities and their influence on the increased concentrations of greenhouse gases (GHGs) has recently affected research efforts in the transportation field. Knocking in gasoline direct ignition (GDI) engine, is a kind of abnormal combustion that can restrict engine energy efficiency. It can also lead to permanent engine damage, under specific operating conditions. This paper focuses on the state of the art of engine knock research, considering the causes, influencing aspects, effects and methodology to predict and to reduce the probability of occurrence of this phenomenon. We present some examples of experimental procedures that were followed to analyze this event, through visualization images that can be supported by numerical activity, consisting of fluid dynamic simulation of the combustion process. Different systems to measure engine knock intensity and some mathematical models to predict abnormal combustion, in order to improve engine performance, are analyzed. Finally, in this work we try to give new perspectives for future research, through the use of different techniques to achieve knocking reduction.

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“…Despite the fact that experimental observations, especially those employing optical accessible engines ; Wang et al, 2017(a); Costa et al, 2016;Marseglia et al, 2017;Merola et al, 2016) are proved to be useful tools in overcoming challenges regarding combustion development of the engines utilizing GDI strategy, the critical role of numerical simulation in obtaining rapid responses with feasible costs have made researches to employ computational fluid dynamics (Boccardi et al, 2016;Zheng et al, 2015;Banerjee et al, 2016;zhao An et al, 2016) in the processes of design and optimization.…”

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confidence: 99%

Numerical Study on the Effects of Fuel Injection Characteristics on the Performance of a Lean Burn SG-GDI Engine towards High Efficiency and Emissions Reduction

Sarmast

Ziabasharhagh

Salavati-Zadeh

et al. 2019

JAFM

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The effects of spark and injection characteristics as well as split injection on the performance and emissions of a spray-guided gasoline direct injection (SG-GDI) engine operating close to stoichiometric conditions are assessed. To accomplish this, a 6-holes injector is simulated and the results are validated against available experimental data for spray penetration length. In addition, an open-cycle multi-dimensional model is developed for a port fuel injection (PFI) engine and the model outcomes are verified against in-cylinder pressure profile and normalized heat release rate. The GDI engine model is yielded under the light of embedment of the above-mentioned models. The model is then employed for investigation of the effects of injector angle, injection pressure, start of first and second injections and two-stage fuel injection with different fuel mass ratios at first and second injections, i.e., split injection, on mixture formation, combustion and engine emissions. The results show the pivotal role of the injector angle on formation of the mixture and output power. On the other hand, it is indicated that while practicing the split injection strategy, the flammability of the relatively stratified lean mixture with fuel to air equivalence ratio of 1.15 around the spark plug, surpasses that of stratified mixture.

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Study about the link between injection strategy and knock onset in an optically accessible multi-cylinder GDI engine

Cited by 54 publications

References 39 publications

Experimental Tests and Modeling on a Combined Heat and Power Biomass Plant

Experimental Tests and Modeling on a Combined Heat and Power Biomass Plant

Energy Efficiency in Gasoline Direct Injection Engines

Numerical Study on the Effects of Fuel Injection Characteristics on the Performance of a Lean Burn SG-GDI Engine towards High Efficiency and Emissions Reduction

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