Combustion and emission characteristics of a diesel engine fuelled with biodiesel/dimethyl ether blends

Wang, Zhangu; Qiao, Xinqi; Hou, Junxing; Liu, Weibo; Huang, Zhiyong

doi:10.1177/0954407011406804

Cited by 11 publications

(4 citation statements)

References 21 publications

(25 reference statements)

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“…10,11 Since then, most empirical investigations have used DME as a neat or blended fuel with diesel for direct injection (DI) compression ignition (CI) engines. 12,13 Generally, the CI engines operate with diesel-fueled, high-pressure direct injection systems. This conventional application ensues heterogeneous combustion, which is efficient but produces excessive nitrogen oxides (NO x ).…”

Section: Introductionmentioning

confidence: 99%

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Combustion control of DME HCCI using charge dilution and spark assistance

Leblanc

Sandhu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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To realize the potential of DME for clean combustion, fueling control is essential. In this research, the challenges, advantages, and applicability of high-pressure direct injection and low-pressure port injection are reviewed and evaluated, especially in relevance to HCCI combustion. In this study, emphasis is given to the applicable ranges of low-pressure fuel delivery in relevance to load, air-fuel ratio, and inert gas dilution, for realizing HCCI combustion. The strategy of high-pressure direct injection is advantageous for combustion phasing control, but the fuel handling is challenging because of the high vapor pressure of DME fuel. The strategy of port fuel injection is prone to early combustion and, consequently, tends to produce excessive pressure rise rates in the combustion chamber. This challenge is escalated at higher engine loads, making homogenous charge compression ignition difficult to achieve. In this paper, the load extension of DME-fueled HCCI combustion was explored. First, the impact of dilution on the combustion characteristics of DME HCCI was studied under lean and CO2 diluted conditions. Under the present empirical setups, results show that the lean-burn strategy has limited capability of combustion phasing control, especially when the engine load is above 5 bar IMEP. The CO2 dilution strategy can significantly retard the combustion phasing until the fulfillment of combustion becomes unstable. It was found that spark assistance is advantageous for combustion control. With an effective application of excess air, intake CO2 dilution and spark assistance, an engine load of 8 bar IMEP was reached with appropriate combustion phasing, with ultra-low NOx emissions.

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Section: Introductionmentioning

confidence: 99%

“… 10 , 11 Since then, most empirical investigations have used DME as a neat or blended fuel with diesel for direct injection (DI) compression ignition (CI) engines. 12 , 13 …”

Section: Introductionmentioning

confidence: 99%

Combustion control of DME HCCI using charge dilution and spark assistance

Leblanc

Sandhu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Wang et al 12 investigated the combustion and emissions characteristics of a direct-injection engine fuelled with DME-biodiesel blends. The results showed that an increased DME percentage results in a retarded ignition time and a reduced peak value of the heat release rate of premixed combustion.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the injection characteristics of dimethyl ether–biodiesel blends in a common-rail injection system

Hou

Wen

Liu

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part D:

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The injection rate and dynamic behaviour during and after the injection of dimethyl ether–biodiesel blends in a common-rail injection system are experimentally studied. The characteristics of the instantaneous line pressure evolution induced by the injection are obtained. In comparison with the injection of biodiesel, the injection of 100 wt % dimethyl ether starts later, but the starts of injection of other fuels are almost at the same time. Increasing the dimethyl ether blending ratio leads to a retarded end of injection and a significantly prolonged injection duration, but the peak injection rate changes little. With increasing rail pressure, the early rate of change in the injection rate with time and the peak injection rate increase, and the injection rate fluctuates more strongly. With increasing energizing time, the start of injection and the peak injection rate remain unchanged. The curves of the line pressure fluctuations at the injector inlet are similar for all dimethyl ether–biodiesel blends. When the dimethyl ether blending ratio is increased from 30 wt % to 100 wt %, the drop in the amplitude of the line pressure at the start of injection becomes smaller, the peak pressure decreases gradually and the phase is retarded. The duration of the line pressure fluctuations after injection becomes longer with increasing dimethyl ether blending ratio. By increasing the rail pressure, the line pressure at the start of injection drops more quickly, with a larger amplitude. At the end of injection, the magnitude of the peak pressure increases with an advanced phase, and the duration of the pressure fluctuations increases. By increasing the energizing time, the line pressure drop at the start of injection is unchanged, and the first line pressure peak increases with a retarded phase.

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“…The emissions, hydrocarbon and NOx are reduced with the addition of cerium oxide nano particles. Qiao et al [8] conducted experiments with the biodiesel and dimethyl ether (DME) blends in direct injection engines with a view to keep the viscosity at required level between biodiesel and DME and also to improve atomization by initiating flash boiling. The results show that with increasing DME blend ratio, the maximum rate of pressure rise decreases linearly, the exhaust gas temperature increases for all loads and power decreases due to low heat value of DME.…”

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confidence: 99%

Experimental Investigation on Injection pressure for MOME Blended Fuel C.I. Engine

Kondaiah¹,

Prasad²

2016

IJERT

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Energy demand increases with growth of population and industrialization in the world. Most of the energy is consumed for transportation of goods and passengers. Most of the vehicles are currently running with conventional fossil fuels and this leads to depletion of these fuels within a few years as well as the increase in environmental pollution levels. It is required to develop alternatives which save fuel for future generation and reduce environmental pollution and global warming. One of the alternatives is to produce biodiesel from renewable source to meet the energy demand. In the present work, Mahua oil methyl ester (MOME) is developed by transesterification and blends are prepared (B0, B25, B50, & B100) with diesel to investigate optimal injection pressure in four stroke C.I engine. The optimal injection pressure and blend are found to be B25 and 240 bar respectively from the experimental results.

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Combustion and emission characteristics of a diesel engine fuelled with biodiesel/dimethyl ether blends

Cited by 11 publications

References 21 publications

Combustion control of DME HCCI using charge dilution and spark assistance

Combustion control of DME HCCI using charge dilution and spark assistance

Experimental study on the injection characteristics of dimethyl ether–biodiesel blends in a common-rail injection system

Experimental Investigation on Injection pressure for MOME Blended Fuel C.I. Engine

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