The addition of hydrogen to a gasoline-fuelled SI engine

D'Andrea, Tina.

doi:10.1016/j.ijhydene.2004.02.002

Cited by 220 publications

(66 citation statements)

References 15 publications

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“…The molecular diffusion coefficient of hydrogen is higher than that for hydrocarbons (Andrea et al, 2004) and changes in flame character in the presence of hydrogen have been attributed to its high diffusivity Sobiesiak, et al, 2002). In this section the effect of hydrogen's high molecular diffusivity on premixed, …”

Section: Diffusion Of Hydrogenmentioning

confidence: 92%

“…The molecular diffusivity of H 2 is almost three times that of methane (Andrea et al, 2004). It has been proposed that hydrogen's high molecular diffusivity improves the homogeneity of the charge and increases turbulence thereby leading to improved combustion (Andrea et al, 2004).…”

Section: Molecular Diffusivitymentioning

confidence: 99%

“…It has been proposed that hydrogen's high molecular diffusivity improves the homogeneity of the charge and increases turbulence thereby leading to improved combustion (Andrea et al, 2004). Here the influence of molecular diffusivity on steady, one-dimensional, laminar premixed flames has been investigated using two different 48 approaches.…”

Section: Molecular Diffusivitymentioning

confidence: 99%

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Hydrogen-Assisted IC Engine Combustion as a Route to Hydrogen Implementation

Boehman¹,

Haworth²

2008

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Section: Diffusion Of Hydrogenmentioning

confidence: 92%

Section: Molecular Diffusivitymentioning

confidence: 99%

Section: Molecular Diffusivitymentioning

confidence: 99%

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Hydrogen-Assisted IC Engine Combustion as a Route to Hydrogen Implementation

Boehman¹,

Haworth²

2008

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“…Nevertheless, this usually causes a reduction in volumetric efficiency at high speeds. Thus, other mechanisms that could increase flame speed without affecting cycle performance at high speed are nowadays sought [6]. One possible option is to modify the fuel in the engine, with additives showing a high laminar flame speed.…”

Section: Simulation Validation and Heat Release Time Series Computationmentioning

confidence: 99%

Symbolic Analysis of the Cycle-to-Cycle Variability of a Gasoline–Hydrogen Fueled Spark Engine Model

et al. 2018

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An study of temporal organization of the cycle-to-cycle variability (CCV) in spark ignition engines fueled with gasoline-hydrogen blends is presented. First, long time series are generated by means of a quasi-dimensional model incorporating the key chemical and physical components, leading to variability in the time evolution of energetic functions. The alterations in the combustion process, for instance the composition of reactants, may lead to quantitative changes in the time evolution of the main engine variables. It has been observed that the presence of hydrogen in the fuel mixture leads to an increased laminar flame speed, with a corresponding decrease in CCV dispersion. Here, the effects of different hydrogen concentrations in the fuel are considered. First, it is observed that return maps of heat release sequences exhibit different patterns for different hydrogen concentrations and fuel-air ratios. Second, a symbolic analysis is used to characterize time series. The symbolic method is based on the probability of occurrence of consecutive states (a word) in a symbolic sequence histogram (SSH). Modified Shannon entropy is computed in order to determine the adequate word length. Results reveal the presence of non-random patterns in the sequences and soft transitions between states. Moreover, the general behavior of CCV simulations results and three types of synthetic noises: white, log-normal, and a noisy logistic map, are compared. This analysis reveals that the non-random features observed in heat release sequences are quite different from synthetic noises.

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“…Dado que la ignición del hidrógeno se da con baja energía y se quema mucho mejor en la combustión, se podría decir que los motores que funcionan con hidrógeno son los más indicados para funcionamiento a condiciones más conservativas, lo que a su vez ayuda al ahorro económico y la emisión de gases contaminantes [17][18]. Musmar [19] y Al-Rousan [20] diseñaron dispositivos capaces de generar HHO para motores a gasolina.…”

Section: Introductionunclassified

Análisis de un generador de HHO de celda seca para su aplicación en motores de combustión interna

Gil¹,

Rey²,

González‐Estrada

2018

revuin

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RESUMENLos motores de combustión interna a gasolina tienen conocidos problemas de eficiencia térmica y alto índice de emisión de gases contaminantes. Por otro lado, existen procesos químicos y eléctricos que han permitido obtener fuentes de energía limpia del agua. La electrólisis permite mediante un proceso electroquímico la obtención de gas de hidrógeno y oxígeno, de cuya mezcla se obtiene HHO. Las características moleculares del HHO permiten la disminución de gases tóxicos al ambiente y el ahorro de combustibles hidrocarbonados en motores de combustión interna. En este trabajo se investigan los beneficios potenciales de la mezcla de HHO como aditivo a los combustibles fósiles, en particular, la gasolina comercial. Se describe el diseño de un sistema con una celda electrolítica y se evalúa el desempeño de un motor de 110 cm 3 en términos del consumo específico de combustible, potencia, torque y emisión de gases.PALABRAS CLAVE: electrólisis; celdas de oxihidrógeno; motores de combustión interna; energía limpia; combustibles. ABSTRACTGasoline internal combustion engines have known issues related to thermal efficiency and high emission of polluting gases. On the other hand, there are chemical and electrical processes that have provided sources of clean energy from water. Electrolysis allows the production of hydrogen and oxygen gas by means of an electrochemical process, from which HHO is obtained. The molecular characteristics of HHO allow the reduction of toxic gases to the environment and the saving of hydrocarbon fuels in internal combustion engines. In this paper, we investigate the potential benefits of HHO mixtures as an additive to fossil fuels, in particular, commercial gasoline. We describe the design of a system with an electrolytic cell and evaluate the performance of a 110 cm 3 engine in terms of brake specific fuel consumption, brake power, brake torque and gas emissions.

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The addition of hydrogen to a gasoline-fuelled SI engine

Cited by 220 publications

References 15 publications

Hydrogen-Assisted IC Engine Combustion as a Route to Hydrogen Implementation

Hydrogen-Assisted IC Engine Combustion as a Route to Hydrogen Implementation

Symbolic Analysis of the Cycle-to-Cycle Variability of a Gasoline–Hydrogen Fueled Spark Engine Model

Análisis de un generador de HHO de celda seca para su aplicación en motores de combustión interna

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