Experimental investigation on combustion characteristics in dual-fuel dual-injection engine

Kang, Rui; Zhou, Lei; Hua, Jianxiong; Feng, Dengquan; Wei, Haiqiao; Chen, Rui

doi:10.1016/j.enconman.2018.11.057

Cited by 43 publications

(13 citation statements)

References 33 publications

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“…Previous solutions of gasoline and ethanol injection concern mainly mixtures of E85 (ethanol -85% and gasoline -15%) and E15 (gasoline -85% and ethanol -15%) [4]. The research of dual-fuel direct injection systems of gasoline and ethanol was conducted by Kang et al [23]. The analyzes include supply with a stoichiometric mixture.…”

Section: Injection Of Gasoline With Other Fuelsmentioning

confidence: 99%

Effects of mixture formation strategies on combustion in dual-fuel engines – a review

Pielecha¹,

Sidorowicz²

2021

Combustion Engines

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The article presents an overview of technical solutions for dual fuel systems used in internal combustion engines. It covers the historical and contemporary genesis of using two fuels simultaneously in the combustion process. The authors pay attention to the value of the excess air coefficient in the cylinder, as the ignitability of the fuel dose near the spark plug is a critical factor. The mixture formation of compression ignition based systems are also analyzed. The results of research on indirect and direct injection systems (and their combinations) have been presented. Research sections were separated based to the use of gasoline with other fuels or diesel oil with other fuels. It was found that the use of two fuels in different configurations of the fuel supply systems extends the conditions for the use of modern combustion systems (jet controlled compression ignition, reactivity controlled compression ignition, intelligent charge compression ignition, premixed charge compression ignition), which will enable further improvement of combustion efficiency.

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Section: Injection Of Gasoline With Other Fuelsmentioning

confidence: 99%

Effects of mixture formation strategies on combustion in dual-fuel engines – a review

Pielecha¹,

Sidorowicz²

2021

Combustion Engines

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“…The existing solutions for the injection of gasoline and ethanol mainly involve mixtures of E85 (85% ethanol and 15% gasoline) and E15 (85% gasoline and 15% ethanol), as used by Benajes et al [17]. Information from research on dual-fuel direct injection systems for gasoline and ethanol is also available in the literature, such as in the research conducted by Kang et al [18]; these analyses, however, include fuel supply with a stoichiometric mixture. Studies have shown that increasing the proportion of ethanol reduces CoV(IMEP).…”

Section: Introductionmentioning

confidence: 99%

Combustion Thermodynamics of Ethanol, n-Heptane, and n-Butanol in a Rapid Compression Machine with a Dual Direct Injection (DDI) Supply System

Pielecha

Wierzbicki

Sidorowicz³

et al. 2021

Energies

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The development of internal combustion engines involves various new solutions, one of which is the use of dual-fuel systems. The diversity of technological solutions being developed determines the efficiency of such systems, as well as the possibility of reducing the emission of carbon dioxide and exhaust components into the atmosphere. An innovative double direct injection system was used as a method for forming a mixture in the combustion chamber. The tests were carried out with the use of gasoline, ethanol, n-heptane, and n-butanol during combustion in a model test engine—the rapid compression machine (RCM). The analyzed combustion process indicators included the cylinder pressure, pressure increase rate, heat release rate, and heat release value. Optical tests of the combustion process made it possible to analyze the flame development in the observed area of the combustion chamber. The conducted research and analyses resulted in the observation that it is possible to control the excess air ratio in the direct vicinity of the spark plug just before ignition. Such possibilities occur as a result of the properties of the injected fuels, which include different amounts of air required for their stoichiometric combustion. The studies of the combustion process have shown that the combustible mixtures consisting of gasoline with another fuel are characterized by greater combustion efficiency than the mixtures composed of only a single fuel type, and that the influence of the type of fuel used is significant for the combustion process and its indicator values.

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Section: Introductionmentioning

confidence: 99%

“…The best performance of combustion is achieved with GPI plus EDI, and the indicated mean effective pressure (IMEP) increases by 2% under light load compared with other dual-injection strategies. Furthermore, Kang et al 30 proposed a new injection mode (GDI plus EDI), finding that the new injection strategy, which combines GDI and EDI, can further expand engine load compared with the conventional gasoline plus ethanol combination, including GDI plus EPI and EPI plus GDI, and the dual-fuel dual-direct injection mode can enhance brake mean effective pressure (BMEP) and thermal efficiency simultaneously. In addition, when the mass flow rates of ethanol and gasoline are 25% and 75%, respectively, the dual-fuel dual-direct injection strategy can help achieve the best performance.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the direct injection timing of dual fuel will play a key role in controlling the mixture formation and further improving the performance of the proposed dual-fuel dual-direct engine, which has not been studied in the previous work. 30 Therefore, as far as the dual-fuel dual-direct injection strategy is concerned, the objective of this work is to investigate the effects of both the gasoline and ethanol injection timings and injector positions on the engine performance and knock suppression in a downsizing gasoline engine. The different injection timings and injector positions will lead to different thermal and composition stratifications as well as octane number stratifications in combustion chamber, which can effectively and flexibly perform the ability of the dual-fuel dual-injection strategy.…”

Section: Introductionmentioning

confidence: 99%

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Effects of the injection timing on knock and combustion characteristics in dual-fuel dual-injection engines

Liu

Kang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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To utilize ethanol fuel in spark ignition engines more efficiently and flexibly, a new ethanol/gasoline dual-direct injection concept in gasoline engine is proposed. Therefore, based on the dual-fuel dual-direct injection system, the effects of different injection timings and two injector positions on the characteristics of combustion were studied comprehensively, and the effects of different octane numbers and temperature stratifications on knock and combustion were explored. The results show that as for Position A (ethanol injecting toward spark plug), with the delay of injection timing, knock tendency and its intensity increase initially and then decrease due to the comprehensive effect of ethanol evaporation and fuel stratification; on the contrary, for Position B (ethanol injecting toward end-gas region), retarding the injection timing of ethanol can effectively reduce the knock propensity. As for the engine performance, a dual-direct injection performs best, especially the retarded injection timing of ethanol for Position A. It can be found that with the delay of the fuel injection timing, the torque first increases and then decreases. The brake-specific fuel consumption decreases initially and then increases at maximum brake torque spark timing.

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Experimental investigation on combustion characteristics in dual-fuel dual-injection engine

Cited by 43 publications

References 33 publications

Effects of mixture formation strategies on combustion in dual-fuel engines – a review

Effects of mixture formation strategies on combustion in dual-fuel engines – a review

Combustion Thermodynamics of Ethanol, n-Heptane, and n-Butanol in a Rapid Compression Machine with a Dual Direct Injection (DDI) Supply System

Effects of the injection timing on knock and combustion characteristics in dual-fuel dual-injection engines

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