Review of hydrogen–gasoline SI dual fuel engines: Engine performance and emission

Purayil, S.T.P.; Hamdan, Mohammad O.; Al-Omari, Salah Addin Burhan; Selim, Mohamed Y. E.; Elnajjar, Emad

doi:10.1016/j.egyr.2023.03.054

Cited by 57 publications

(11 citation statements)

References 160 publications

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“…Hydrogen DI, compared with PFI, has the advantage that reduces abnormal combustion phenomena like preignition, backfire and knock, but in terms of emissions, a higher level of NOx and an increase in cyclic variation was noted. Using 18% EGR flow rate, showed a reduction of NOx with 77.8% [2].…”

Section: Introductionmentioning

confidence: 96%

“…Because of the difficulty of storing large quantities on-board and the power loss at stoichiometric ratio, using pure hydrogen to fuel the engine is not feasible, so hydrogen blended fuels can be used as an alternative in the transition phase for automotive use. According to [2], cyclic variations or cycle-to-cycle variation (CCV), have a direct effect on vehicle drivability. CCV can deteriorate the engine`s output torque, resulting in combustion instability, engine noise and vibration.…”

Section: Introductionmentioning

confidence: 99%

“…According to [2], [4] and [8], the main sources of cyclic variation in a SI engine are: (a) turbulence formation in the cylinder flow field, (b) variation in fuel-air ratios, (c) the homogenous nature of fuel mixtures, (d) characteristics of spark discharge and flame development, (e) the quantity of leftover and recirculated gases in the cylinder. A high turbulence flow can affect the fuel concentration in the cylinder.…”

Section: Introductionmentioning

confidence: 99%

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Aspects of the combustion variability analysis at an automotive engine fuelled with hydrogen

Georgescu,

Pana,

Negurescu

et al. 2024

IOP Conf. Ser.: Mater. Sci. Eng.

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Over the last decades, the use of the alternative fuels was one of the main research activities for specialists in the field of internal combustion engines. The development of the modern automotive engines is constantly challenged by the more severe emission legislation. The engine emissions levels and the fuel efficiency are directly influenced by the engine operation, reproduction of the combustion phases from one cycle to other, cyclic dispersion during combustion process being important. In general, the use of alternative fuels in internal combustion engines provides an improvement of the energetic and pollution performance, or just a slight improvement of them, but the study of the combustion process must be completed with aspects regarding the cyclic variability. In particular, using this alternative fuel, a study of cyclic variation of the combustion process would be necessary in order to establish if the normal operation of the engine can be ensured. The paper presents some aspects of the analysis of the cyclic variability at a spark ignition engine fuelled with gasoline and hydrogen. During the engine operation at the regime of 2500 rev/min speed and 55% engine load, a number of 250 consecutive combustion cycles was recorded for classic fuel use and for hydrogen use. The coefficient of cyclic variation (CCV) or the coefficient of variation (COV) is determined for different combustion parameters such as maximum pressure, maximum pressure rise rate and mass fraction burned, defined by angles at which the conventional fractions of 10%, 50% and 90% of the heat of reaction is released. Thus, the values of the COV for maximum pressure (COV)pmax, maximum pressure rise rate (COV)dp/dα, angles of 10, 50 and 90% heat release as (COV)10%, (COV)50% and (COV)90% were calculated and compared with the admissible limit of 10%. The combustion variability analysis establishes the limits of the normal operation of the spark ignition engine fuelled with gasoline and hydrogen compared with the classic fuelling method.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Aspects of the combustion variability analysis at an automotive engine fuelled with hydrogen

Georgescu,

Pana,

Negurescu

et al. 2024

IOP Conf. Ser.: Mater. Sci. Eng.

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“…2 Further, hydrogen has extremely low emission levels because the only combustion pollutant of hydrogen is NO x . 3 Therefore, the excellent combustion and emission characteristics significantly broaden the application prospects of hydrogen in internal combustion engines.…”

Section: Introductionmentioning

confidence: 99%

Auto-ignition and reaction kinetic characteristics of hydrogen-enriched n-dodecane mixtures under engine-like thermodynamic conditions

Yang,

Zhai,

Gong

et al. 2024

Sustainable Energy Fuels

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“…Therefore, in the short term, internal combustion engines continue to be the primary source of propulsion [11]. In response to energy shortages [12] and climate change, researchers are actively searching for renewable and clean energy sources, such as natural gas [13], hydrogen [14], biofuels [15], and ethanol [16].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations of the Hydrogen Injectors on the Combustion Characteristics and Performance of a Hydrogen Internal Combustion Engine

Huang,

Luo,

Sun

et al. 2024

Sustainability

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Hydrogen is regarded as an ideal zero-carbon fuel for an internal combustion engine. However, the low mass flow rate of the hydrogen injector and the low volume heat value of the hydrogen strongly restrict the enhancement of the hydrogen engine performance. This experimental study compared the effects of single-injectors and double-injectors on the engine performance, combustion pressure, heat release rate, and the coefficient of variation (CoVIMEP) based on a single-cylinder 0.5 L port fuel injection hydrogen engine. The results indicated that the number of hydrogen injectors significantly influences the engine performance. The maximum brake power is improved from 4.3 kW to 6.12 kW when adding the injector. The test demonstrates that the utilization of the double-injector leads to a reduction in hydrogen obstruction in the intake manifold, consequently minimizing the pumping losses. The pump mean effective pressure decreased from −0.049 MPa in the single-injector condition to −0.029 MPa in the double-injector condition with the medium loads. Furthermore, the double-injector exhibits excellent performance in reducing the coefficient of variation. The maximum CoVIMEP decreased from 2.18% in the single-injector configuration to 1.92% in the double-injector configuration. This result provides new insights for optimizing hydrogen engine injector design and optimizing the combustion process.

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Review of hydrogen–gasoline SI dual fuel engines: Engine performance and emission

Cited by 57 publications

References 160 publications

Aspects of the combustion variability analysis at an automotive engine fuelled with hydrogen

Aspects of the combustion variability analysis at an automotive engine fuelled with hydrogen

Auto-ignition and reaction kinetic characteristics of hydrogen-enriched n-dodecane mixtures under engine-like thermodynamic conditions

Experimental Investigations of the Hydrogen Injectors on the Combustion Characteristics and Performance of a Hydrogen Internal Combustion Engine

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