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

Hou, Junxing; Wen, Zhenhua; Liu, Yuanpeng; Jiang, Zhiqiang

doi:10.1177/0954407013507444

Cited by 7 publications

(4 citation statements)

References 21 publications

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“…Hou et al studied the injection rate and dynamic behavior of biodiesel–DME blends in a common rail injection system. , The findings demonstrate that the injection timing of biodiesel–DME blends is similar to that of biodiesel. Their injection duration is prolonged significantly with a decrease in the biodiesel ratio, but the maximum injection rate does not vary much.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Combustion Behaviors and Emission Characteristics of Diesel Engines Fueled with Biodiesel or Biodiesel Blends

Hou

Wang

et al. 2022

ACS Omega

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In this study, we carried out an experimental analysis of combustion behaviors and emission characteristics of pure biodiesel and biodiesel–dimethyl ether (DME) blends and determined the impacts of the biodiesel ratio and the nozzle parameter on the combustion pressure characteristics in the time domain/frequency domain and emission characteristics. The findings show that with a decrease in the biodiesel proportion in biodiesel–DME blends, the maximum combustion pressure and fuels in the premixed combustion stage decrease with a retarded maximum value phase, but the maximum heat release in diffusive combustion increases and the maximum amplitude of pressure rise acceleration decreases. All of the pressure level curves of BD100, BD80, and BD50 contain a rapid decrease stage 1, a slow decrease stage 2, and a fluctuating stage 3. With a decrease in the biodiesel proportion, the exhaust gas temperature, NO x emissions, and smoke emissions of BD100, BD80, and BD50 decrease gradually. Compared with a 5 × 0.43 mm nozzle, the maximum combustion pressure and maximum heat release rate of BD50 for a 4 × 0.35 mm nozzle were higher and the phase of the maximum value was advanced. Soot emissions for the 4 × 0.35 mm nozzle were lower, which is especially obvious under a high brake mean effective pressure (BMEP).

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Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Combustion Behaviors and Emission Characteristics of Diesel Engines Fueled with Biodiesel or Biodiesel Blends

Hou

Wang

et al. 2022

ACS Omega

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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%

“… 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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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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“…Different nozzlehole shapes change the fuel flow and the cavitations tendency. 20 Injection characteristics for biodiesel and DME are further compared by Hou et al 21 The results indicate that the injection delay of DME is longer than that of biodiesel. Lower bulk modulus and higher compressibility of DME lead to a delay in the end of the injection and thus significantly prolong injection duration than biodiesel, but the peak injection rate changes little.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on dynamic injection behaviors of biodiesel and its blends in a common-rail injection system

Hou

Zhang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The dynamic injection behaviors of pure biodiesel, high-proportioned biodiesel blends, and low-proportioned biodiesel blends in a common-rail injection system are researched. The effects of biodiesel ratio in the blended fuel and injection condition on the injection rate, cycle injection quantity, and fuel line pressure at the injector inlet are determined. The findings show that the injection duration is extended with the decrease in biodiesel ratio in the blended fuel, and fluctuation amplitude of injection rate in the stable injection stage increases. The first four pressure peaks for pure biodiesel decrease rapidly, while for blends, they decrease slowly, which results in an increasing difference of four pressure peaks between pure biodiesel and blends. With the decrease in biodiesel ratio, the mean volume injection quantity for three fuels gradually increases in the same injection condition. The coefficient of variation of the cycle injection quantity value for biodiesel and its blends with 30 cycles increases. The coefficient of variation value for biodiesel is between 0.4% and 0.7%. Compared with pure biodiesel, the mean volume injection quantity for BD70 increases by about 20–32%, and the coefficient of variation value is between 0.7% and 1.7% for high-proportioned biodiesel blends. The mean volume injection quantity increases by about 36–43% for low-proportioned biodiesel blends and the coefficient of variation value is between 1.1% and 2.1%.

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

Cited by 7 publications

References 21 publications

Comparative Analysis of Combustion Behaviors and Emission Characteristics of Diesel Engines Fueled with Biodiesel or Biodiesel Blends

Comparative Analysis of Combustion Behaviors and Emission Characteristics of Diesel Engines Fueled with Biodiesel or Biodiesel Blends

Combustion control of DME HCCI using charge dilution and spark assistance

Experimental study on dynamic injection behaviors of biodiesel and its blends in a common-rail injection system

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