Effects of the continuous variable valve lift system and Miller cycle strategy on the performance behavior of the lean-burn natural gas spark ignition engine

Wang, Jinfei; Duan, Xiongbo; Wang, Wukun; Guan, Jinhuan; Li, Yangyang; Liu, Jingping

doi:10.1016/j.fuel.2021.120762

Cited by 59 publications

(9 citation statements)

References 59 publications

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“…RVP of gasoline is one of the factors of essential physicochemical properties for the degree of exhaust emissions of volatile components in the gasoline fuel supply system and in the combustion behavior, particularly at engine start on cold times and at steady work on hot times . The gasoline volatility is declared by one or various properties, including the fractional composition property range, RVP, as well as liquid/vapor ratio. , The greater the RVP, the greater the risk of vapor locks within gasoline engine operation but the better the starting gasoline properties . The vapor pressure of evaporating gasoline on the walls of the container depends upon its chemical and fractional composition and temperature .…”

Section: Resultsmentioning

confidence: 99%

“…36 The gasoline volatility is declared by one or various properties, including the fractional composition property range, RVP, as well as liquid/vapor ratio. 37,38 The greater the RVP, the greater the risk of vapor locks within gasoline engine operation but the better the starting gasoline properties. 39 The vapor pressure of evaporating gasoline on the walls of the container depends upon its chemical and fractional composition and temperature.…”

Section: Distillation Characteristic Range Of Meihmentioning

confidence: 99%

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Unraveling the Superior Role of Characterizing Methyl Ester of Isohexene as an Innovative High-Octane Gasoline Mixing Component

et al. 2022

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High concentrations of isoolefinic hydrocarbons can adversely affect the physical, chemical, mechanical, and ecological characteristics of gasoline fuels. One of the solutions to reduce olefin contents is the utilization of the methoxylation process. The current paper declares a perspective toward a gasoline-component-first technique, revealing an innovative highoctane additive on the basis of isoolefinic components, like isohexene. The olefin content of isohexene was 94% volumetrically. This affected the chemical oxidation under atmospheric conditions. Several gasoline fuels and experimental facilities that match European and Russian requirements were used to execute the recent work. The objective of the methoxylation process is to enhance the chemical oxidation fuels to raise the portion of aliphatic hydrocarbon isomers, to decrease unwanted olefin content, as well as to generate high-octane motor ethers as gasoline octane boosters. The product can be defined as methyl ester of isohexene (MEIH). Various MEIH blends have been measured with other gasoline octane boosters and refinery products. The results proved that antidetonation properties of MEIH were higher than those of base gasolines, tertiary amyl methyl ether (TAME), and isohexene and approximately equal to that of methyl tertiary butyl ether (MTBE). Additionally, the results of the calculated MEIH mixing octane rating were from 104.3 to 131.5 for the research method and from 87.5 to 120.0 for the motor method. Likewise, the olefin content of MEIH was 74.2% when the methoxylation process was applied for isohexene. The oxygen content of MEIH was 3.3 wt %, with no oxygen content in the sample of isohexene. Those have been done thanks to the utilization of the methoxylation process of isohexene. Finally, MEIH provided an individual perspective as a liquid transportation fuel with merits over isohexene, in terms of antidetonation properties, olefin contents, as well as a distillation characteristic range.

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Section: Resultsmentioning

confidence: 99%

Section: Distillation Characteristic Range Of Meihmentioning

confidence: 99%

Unraveling the Superior Role of Characterizing Methyl Ester of Isohexene as an Innovative High-Octane Gasoline Mixing Component

et al. 2022

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“…A constant increase in the antiknock resistance of the fuel is ensured by the involvement of various high-octane hydrocarbon components (reforming products, isomerization, catalytic cracking, alkylation, etc.) and nonhydrocarbon additives, primarily oxygenates, such as bioethanol, methyl tert -butyl ether (MTBE), and tertiary amyl methyl ether (TAME) …”

Section: Prospects For the Production Of Motor Gasolinementioning

confidence: 99%

Advanced Progress and Prospects for Producing High-Octane Gasoline Fuel toward Market Development: State-of-the-Art and Outlook

Abdellatief,

Ershov,

Savelenko

et al. 2023

Energy Fuels

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The development of oil refining in advanced nations is mostly focused on low-carbon fuel. Similar efforts are being made to improve the fuel efficiency of internal combustion engines, which will result in lower exhaust emissions. Furthermore, by assessing the indicated trends in engine building, it is important for fuel manufacturers to understand how the requirements for gasoline quality indicators will change, primarily for its knock resistance. The aim of the current comprehensive article is to study the state-of-the-art review emphasizing recent progress and prospects for producing high-octane gasoline fuel toward market development. The market for branded gasoline and multifunctional additives, involving friction modifiers, corrosion inhibitor components, as well as detergent components is presented. Furthermore, market development trends and quality requirements for motor gasoline, involving antiknocking characteristics and gasoline oxygenated compounds as additives, are exhibited. Besides, perspective gasoline engine technologies, including different types of engines, are declared. The formulation of effective gasoline surrogates is a challenging task due to advanced combustion strategies, engine design, and variable operating conditions in spark-ignition engines. The extensive development of direct injection and turbocharging technologies is constrained by the actual compression ratio of engines. Likewise, an increase in the knock resistance of the produced gasoline would further increase the compression ratio and efficiency of new internal combustion engines.

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“…Various techniques have been proposed and analyzed in the literature to prevent knock occurrence. The Miller cycle, implemented through Late Intake Valve Closure or Early Intake Valve Closure, is a widely used strategy that can effectively reduce knock propensity [2][3][4][5]. External cooled Exhaust Gas Recirculation (EGR) circuits have also been extensively studied for knock mitigation in current literature [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Supercritical water injection in a single cylinder research engine: a PIV study

Piras,

Marchitto,

Tornatore

2023

J. Phys.: Conf. Ser.

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This work presents the experimental results of a fluid dynamic investigation to characterize the injection of supercritical water in the combustion chamber of an internal combustion engine. Particle Image Velocimetry (PIV) analysis is carried out in an optically accessible 2-stroke Diesel engine. A prechamber, equipped with two optical accesses is connected to the main cylinder through a tangential duct so that the piston stroke induces a swirled motion field with angular velocities typical of light duty engines for automotive application. The engine is equipped with an injection system for the production and injection of supercritical water, with the possibility to independently regulate the injection pressure, temperature, duration, and timing. Tests have then been carried out under different operating conditions to evaluate the impact of the fluid dynamics in the combustion chamber on the water spray. First, the airflow velocity field has been characterized at different engine crank train angles. The water spray has been macroscopically characterized for an injection temperature of 300°C and pressure of 30Mpa. Then, the supercritical water/air interaction has been explored, at different injection pressure, temperature, and Start of Injection (SOI) to provide global information in terms of spray morphology, tip penetration, and velocity vector distribution of the water droplets within the combustion chamber for different injection strategies.

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Effects of the continuous variable valve lift system and Miller cycle strategy on the performance behavior of the lean-burn natural gas spark ignition engine

Cited by 59 publications

References 59 publications

Unraveling the Superior Role of Characterizing Methyl Ester of Isohexene as an Innovative High-Octane Gasoline Mixing Component

Unraveling the Superior Role of Characterizing Methyl Ester of Isohexene as an Innovative High-Octane Gasoline Mixing Component

Advanced Progress and Prospects for Producing High-Octane Gasoline Fuel toward Market Development: State-of-the-Art and Outlook

Supercritical water injection in a single cylinder research engine: a PIV study

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