Comprehensive model for energetic analyses of a series hybrid-electric vehicle powered by a passive Turbulent Jet Ignition engine

Frasci, Emmanuele; Cervone, Davide; Nacci, Gianluca; Sementa, Paolo; Arsie, Ivan; Jannelli, Elio; Vaglieco, Bianca Maria

doi:10.1016/j.enconman.2022.116092

Cited by 9 publications

(2 citation statements)

References 16 publications

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“…To evaluate the most convenient working conditions to be selected for engine operation as APU in a series HEV, a more extended characterization of engine performance, fuel consumption, and pollutant emissions is mandatory. 36 Therefore, additional simulations were carried out to exploit engine operation over a wider range of engine speeds, as reported in Table 6.…”

Section: Resultsmentioning

confidence: 99%

Experimental and numerical investigation of the impact of the pure hydrogen fueling on fuel consumption and NO_x emissions in a small DI SI engine

Frasci

Sementa²,

Arsie

et al. 2023

International Journal of Engine Research

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In the last few years, car manufacturers are moving toward electrified powertrains, like Battery Electric Vehicles (BEV) and Hybrid Electric Vehicles (HEV), to reduce the levels of CO2 in the atmosphere. A promising alternative to BEVs to reduce CO2 emissions, while maintaining an existing and well-developed technology, could be the use of hydrogen for internal combustion engines (ICEs). Particularly, the zero-carbon content of hydrogen allows for guaranteeing very clean combustion and near-zero carbon footprint. Within this context, the present study aims to deeply investigate the effects of pure hydrogen fueling of Spark Ignition (SI) engines, especially on specific fuel consumption and NOx emissions. Particularly, the benefits of pure hydrogen fueling were assessed in a production small Direct Injection (DI) SI engine. The engine is intended to operate in steady state conditions as an Auxiliary Power Unit (APU) for a series hybrid powertrain. The effects of pure hydrogen fueling were investigated at two engine speeds, namely 2000 and 3000 rpm. All tests were carried out at unthrottled conditions and lean mixture. A 1-D engine model was developed within a commercial software. Combustion, heat transfer, and NOx emissions embedded sub-models were tuned based on the experimental data, to accurately reproduce the engine behavior in a wide range of operating conditions. Both experimental and simulation results demonstrated that hydrogen fueling, together with lean mixture operation, allow for significantly improving engine thermal efficiency. The results of 1-D model simulations supported the energy management strategies of the hybrid powertrain in selecting the most suitable ICE operating condition. Particularly, the best engine operating conditions in terms of fuel consumption are achieved at 2500 rpm, with λ = 2.0, while the lowest NOx emissions are reached when λ is increased up to 2.4.

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Section: Resultsmentioning

confidence: 99%

Experimental and numerical investigation of the impact of the pure hydrogen fueling on fuel consumption and NO_x emissions in a small DI SI engine

Frasci

Sementa²,

Arsie

et al. 2023

International Journal of Engine Research

Self Cite

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“…In recent years, different technologies for improving thermal efficiency have been proposed, such as cooled exhaust gas recirculation (EGR), direct injection, high-energy ignition, lean-burning, miller cycle combined with high compression ratio, pre-chamber (PC), etc. [6][7][8]. The lean-burning technology is considered a promising solution, thanks to its higher specific heat ratio and lower auto-ignition tendencies.…”

Section: Introductionmentioning

confidence: 99%

Nozzle Design of Plug-and-Play Passive Pre-Chamber Ignition Systems for Natural Gas Engines

Li,

Ma,

Zhu

et al. 2023

Applied Sciences

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To evaluate the significance of the geometrical parameters of a passive pre-chamber on engine performance, this study investigated the design of a plug-and-play passive pre-chamber in a 15 L heavy-duty natural gas engine. Multi-dimensional numerical investigations were conducted for parametric studies involving lateral angle, orifice diameter, and vertical angle. A compressive flow solver was employed for Navier–Stoke equations, coupled with detailed sub-models and a chemical kinetic scheme. The combustion model was calibrated and could well predict the engine combustion and operating performance. Seven pre-chamber schemes were evaluated, and four optimal ones were selected for experimental tests. The characteristics of the scavenging process, turbulent jet ignition, and main-chamber combustion were investigated and analyzed. The results show that, considering the trade-off between the ignition energy and the scavenging efficiency, the ratio of the pre-chamber to clearance volume is recommended to be 0.2~0.7%, and the corresponding area–volume ratio is 0.003~0.006 mm−1. Compared with the original natural gas engine, the pre-chamber retrofit can save up to 13.2% of fuel consumption, which presents a significant improvement in fuel economy.

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Effect of passive pre-chamber orifice diameter on the methane combustion process in an optically accessible SI engine

Antolini

Sementa

Tornatore

et al. 2023

Fuel

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Comprehensive model for energetic analyses of a series hybrid-electric vehicle powered by a passive Turbulent Jet Ignition engine

Cited by 9 publications

References 16 publications

Experimental and numerical investigation of the impact of the pure hydrogen fueling on fuel consumption and NO_x emissions in a small DI SI engine

Experimental and numerical investigation of the impact of the pure hydrogen fueling on fuel consumption and NO_x emissions in a small DI SI engine

Nozzle Design of Plug-and-Play Passive Pre-Chamber Ignition Systems for Natural Gas Engines

Effect of passive pre-chamber orifice diameter on the methane combustion process in an optically accessible SI engine

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Comprehensive model for energetic analyses of a series hybrid-electric vehicle powered by a passive Turbulent Jet Ignition engine

Cited by 9 publications

References 16 publications

Experimental and numerical investigation of the impact of the pure hydrogen fueling on fuel consumption and NOx emissions in a small DI SI engine

Experimental and numerical investigation of the impact of the pure hydrogen fueling on fuel consumption and NOx emissions in a small DI SI engine

Nozzle Design of Plug-and-Play Passive Pre-Chamber Ignition Systems for Natural Gas Engines

Effect of passive pre-chamber orifice diameter on the methane combustion process in an optically accessible SI engine

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Product

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Experimental and numerical investigation of the impact of the pure hydrogen fueling on fuel consumption and NO_x emissions in a small DI SI engine

Experimental and numerical investigation of the impact of the pure hydrogen fueling on fuel consumption and NO_x emissions in a small DI SI engine