Combustion and emission characteristics of an ultra-lean burn gasoline engine with dimethyl ether auto-ignition

He, Bang-Quan; Xu, Si-Peng; Fu, Xue-Qing; Zhao, Hua

doi:10.1016/j.energy.2020.118437

Cited by 15 publications

(7 citation statements)

References 34 publications

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“…Sulfur content is limited to 150 mg/kg, aromatic hydrocarbons to 40% vol, and benzene to 2.5% vol. A requirement has been added for the amount of unsaturated hydrocarbons in the fuel (not more than 18% by volume) …”

Section: Prospects For the Production Of Motor Gasolinementioning

confidence: 99%

“…A requirement has been added for the amount of unsaturated hydrocarbons in the fuel (not more than 18% by volume). 81 Markets with increased requirements for exhaust gas characteristics form the third category and are guided by Euro 3/4, LEV standards. The fourth category is represented by markets with the highest requirements for the quantity and composition of exhaust gases (Euro 4/5/6, Tier 2−3, and LEV II/III).…”

Section: Market Development Trends and Qualitymentioning

confidence: 99%

See 1 more Smart Citation

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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Section: Prospects For the Production Of Motor Gasolinementioning

confidence: 99%

Section: Market Development Trends and Qualitymentioning

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

View full text Add to dashboard Cite

show abstract

“…Due to high combustion temperature of hydrogen fuel, NO x emissions from hydrogen internal combustion engines were much higher than other fuels. As the main approach of dropping NO x emissions, lean-burn technology was widely investigated [64]. Figure 14 shows NO x concentration over various equivalence ratios and ignition timing.…”

Section: No X Emission Characteristicsmentioning

confidence: 99%

The Effect of Ignition Timing on the Emission and Combustion Characteristics for a Hydrogen-Fuelled ORP Engine at Lean-Burn Conditions

et al. 2022

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The application of hydrogen fuel in ORP engines makes the engine power density much higher than that of a reciprocating engine. This paper investigated the impacts of combustion characteristics, energy loss, and NOx emissions of a hydrogen-fuelled ORP engine by ignition timing over various equivalence ratios using a simulation approach based on FLUENT code without considering experiments. The simulations were conducted under the equivalence ratio of 0.5~0.9 and ignition timing of −20.8~8.3 °CA before top dead centre (TDC). The engine was operated under 1000 RPM and wide-open throttle condition which was around the maximum engine torque. The results indicated that significant early ignition of the ORP engine restrained the flame development in combustion chambers due to the special relative positions of ignition systems to combustion chambers. In-cylinder pressure evolutions were insensitive to early ignition. The start of combustion was the earliest over the ignition timing of −17.3 °CA for individual equivalence ratios; the correlations of the combustion durations and equivalence ratios were dependent on the ignition timing. Combustion durations were less sensitive to equivalence ratios in the ignition timing range of −14.2~−11.1 °CA before TDC. The minimum and maximum heat release rates were 15 J·(°CA)−1 and 22 J·(°CA)−1 over the equivalence ratios of 0.5 and 0.9, respectively. Indicated thermal efficiency was higher than 41% for early ignition scenarios, and it was significantly affected by late ignition. Energy loss by cylinder walls and exhaust was in the range of 10%~16% and 42%~58% of the total fuel energy, respectively. The impacts of equivalence ratios on NOx emission factors were affected by ignition timing.

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“…The dual DI strategy can increase the IMEP, reduce cycle variation, and the decay rate of the turbulent flame propagation velocity is slower than that of single DI, thereby improving combustion stability. He et al 98 found that in the case of split DI, the heat release process of DME is related to the fraction of DME in each injection. When the total energy score of DME in a cycle is fixed, the higher energy fraction of DME in the secondary DI can lead to early ignition, shorten the combustion duration, reduce the cycle change of combustion, increase the emission of NO x , and reduce the emissions of HC and CO.…”

Section: Ethersmentioning

confidence: 99%

Ethers and esters as alternative fuels for internal combustion engine: A review

Hua

2021

International Journal of Engine Research

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Ether and ester fuels can work in the existing internal combustion (IC) engine with some important advantages. This work comprehensively reviews and summarizes the literatures on ether fuels represented by DME, DEE, DBE, DGM, and DMM, and ester fuels represented by DMC and biodiesel from three aspects of properties, production and engine application, so as to prove their feasibility and prospects as alternative fuels for compression ignition (CI) and spark ignition (SI) engines. These studies cover the effects of ether and ester fuels applied in the form of single fuel, mixed fuel, dual-fuel, and multi-fuel on engine performance, combustion and emission characteristics. The evaluation indexes mainly include torque, power, BTE, BSFC, ignition delay, heat release rate, pressure rise rate, combustion duration, exhaust gas temperature, CO, HC, NOx, PM, and smoke. The results show that ethers and esters have varying degrees of impact on engine performance, combustion and emissions. They can basically improve the thermal efficiency of the engine and reduce particulate emissions, but their effects on power, fuel consumption, combustion process, and CO, HC, and NOx emissions are uncertain, which is due to the coupling of operating conditions, fuel molecular structure, in-cylinder environment and application methods. By changing the injection strategy, adjusting the EGR rate, adopting a new combustion mode, adding improvers or synergizing multiple fuels, adverse effects can be avoided and the benefits of oxygenated fuel can be maximized. Finally, some challenges faced by alternative fuels and future research directions are analyzed.

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Combustion and emission characteristics of an ultra-lean burn gasoline engine with dimethyl ether auto-ignition

Cited by 15 publications

References 34 publications

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

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

The Effect of Ignition Timing on the Emission and Combustion Characteristics for a Hydrogen-Fuelled ORP Engine at Lean-Burn Conditions

Ethers and esters as alternative fuels for internal combustion engine: A review

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