Influence of injection parameters on combustion, gaseous emissions and particle size distribution of a CRDI diesel engine operating with PODE/diesel blends

Wang, Tianting; Liu, Junheng; Sun, Ping; Qian, Jiasheng; Gao, Wanying; Yang, Chen

doi:10.1016/j.fuel.2020.118733

Cited by 31 publications

(11 citation statements)

References 49 publications

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“…It also has been shown that the same fuel has different combustion and emission performances in different types of diesel engines 39 . Likewise, there are certain differences in the effects of blending the same proportion of PODE n into the diesel fuel on the combustion characteristics of different types or models of engines as well as the effects on the emissions of NO x , soot, and CO 26 , 31 , 34 , 36 , 40 , 41 . Many studies have confirmed the feasibility of adding PODE n to diesel engines, yet there are few experimental studies regarding PODE n blending with the diesel used in diesel engines that meet the China VI emission standards.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the effects of blending PODEn on performance, combustion and emission characteristics of heavy-duty diesel engines meeting China VI emission standard

Zhao

Geng

Weibo

et al. 2021

Sci Rep

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To study the influence of diesel fuel blended with polyoxymethylene dimethyl ethers (PODEn), a new alternative fuel with a high oxygen content and large cetane number, on the combustion characteristics, fuel economies, and emission characteristics of heavy-duty diesel engines that meet China VI emission standards, relevant tests were conducted on a supercharged intercooled high-pressure common-rail diesel engine. The PODEn were blended with diesel fuel at three different ratios (volume fractions of 10%, 20%, and 30%). The test results showed that the PODEn could optimize the combustion process of diesel engines that met the China VI emission standards, effectively improve the thermal efficiencies of diesel engines, and reduce the emissions of hydrocarbon (HC), carbon monoxide (CO), and soot. With an increase in the PODEn blending ratio, the peak values of the in-cylinder pressure, average in-cylinder temperature, and instantaneous heat release rate gradually decreased, and each peak progressively moved forward. As the start of combustion gradually moved forward, the combustion duration was shortened by 0.7–2.8°CA, the heat release process became more concentrated, and the effective thermal efficiency was increased by up to 2.57%. The effective fuel consumption gradually increased, yet the equivalent effective fuel consumption gradually decreased, with the largest drop being as high as 4.55%. The nitrogen oxides (NOx) emission increased slightly, and the emissions of HC, CO, and soot gradually decreased. The emissions of CO and soot declined significantly under high-speed and high-load conditions, with the highest reductions reaching 66.2% and 76.3%, respectively.

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Section: Introductionmentioning

confidence: 99%

Experimental study on the effects of blending PODEn on performance, combustion and emission characteristics of heavy-duty diesel engines meeting China VI emission standard

Zhao

Geng

Weibo

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…This could be due to lowered fuel penetration distance that reduces the wall impingement as mass flow rate per hole gets reduced. More quantity of fuel participating in combustion and higher percentage of vaporization resulting from 8-hole nozzle could be other reasons for lowered trends of CO emissions [19]. Biodiesels show higher CO than diesel fuel due to their lower cetane number, higher viscosity, and lower volatility character that led to poor atomization though fuels are injected at the same IP.…”

Section: Hc-emissions (Hce) and Co-emissions (Coe)mentioning

confidence: 99%

“…Wang et al [19] studied the combustion process, particle size distribution, and the emission characteristics of a CRDI engine fueled with PODE biodiesel blends at various injection pressures of 80, 90, and 100 Mpa, IT of 0.5 • , 2.5 • , and 4.5 • CA ATDC. With the delay in the injection timing, CO, HC, and soot emissions increased, whereas NOx reduced for B10 blend.…”

Section: Introductionmentioning

confidence: 99%

Influence of Combustion Chamber Shapes and Nozzle Geometry on Performance, Emission, and Combustion Characteristics of CRDI Engine Powered with Biodiesel Blends

et al. 2021

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Environmentally friendly, renewable, and green fuels have many benefits over fossil fuels, particularly regarding energy efficiency, in addition to addressing environmental and socioeconomic problems. As a result, green fuels can be used in transportation and power generating applications. Furthermore, being green can ably address the emission-related issues of global warming. In view of the advantages of renewable fuels, two B20 fuel blends obtained from methyl esters of cashew nutshell (CHNOB), jackfruit seed (JACKFSNOB), and jamun seed oils (JAMSOB) were selected to evaluate the performance of a common rail direct injection (CRDI) engine. Compatibility of the nozzle geometry (NG) and combustion chamber shape (CCS) were optimized for increased engine performance. The optimized CCS matched with an increased number of injector nozzle holes in NG showed reasonably improved brake thermal efficiency (BTE), reduced emissions of smoke, HC, and CO, respectively, while NOx increased. Further combustion parameters, such as ignition delay (ID) and combustion duration (CD) reduced, while peak pressure (PP) and heat release rates (HRR) increased at the optimized injection parameters. The CRDI engine powered with JAMSOB B20 showed an increase in BTE of 4–5%, while a significant reduction in HC and CO emissions was obtained compared to JACKFSNOB B20 and CHNOB B20, with increased NOx.

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“…Fueling with diesel/PODE n blended fuels, adjustment of the injection parameters was also performed to optimize the engine-out emissions, especially for PM reduction. At a fixed speed of 1600 rpm and the full load condition, Wang et al [22] found that increasing the injection pressure from 80 to 100 MPa decreased the number concentrations of accumulation mode particles but increased those of nucleation mode particles, which resulted in a reduction of total PNC. However, Chen et al [23] claimed that the variations in PNC with the increasing injection pressure may be related to engine loads.…”

Section: Introductionmentioning

confidence: 99%

Filtration Efficiency and Regeneration Behavior in a Catalytic Diesel Particulate Filter with the Use of Diesel/Polyoxymethylene Dimethyl Ether Mixture

et al. 2021

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Polyoxymethylene dimethyl ether (PODEn) is a promising diesel additive, especially in particulate matter reduction. However, how PODEn addition affects the filtration efficiency and regeneration process of a catalytic diesel particulate filter is still unknown. Therefore, this experimental work investigated the size-dependent particulate number removal efficiency under various engine loads and exhaust gas recirculation ratios when fueling with diesel and diesel/PODEn mixture. In addition, the regeneration behavior of the cDPF was studied by determining the break-even temperatures for both tested fuels. The results showed that the cDPF had lower removal efficiencies in nucleation mode particles but higher filtration efficiencies in accumulation mode particles. In addition, the overall filtration efficiency for P10 particles was higher than that for D100 particles. Positioning the upstream cDPF, increasing the EGR ratio slightly decreased the number concentration of nucleation mode particles but greatly increased that of accumulation mode particles. However, increasing the EGR ratio decreased the removal efficiency of nanoparticles, and this effect was more apparent for the P10 case. Under the same period of soot loading, the pressure drop of P10 fuel was significantly lower than that of diesel fuel. In addition, a significantly lower BET was observed for the P10 fuel, in comparison with D100 fuel. In conclusion, adopting cDPF is beneficial for fueling with P10 in terms of the overall filtration efficiency in the particulate number and the lower input energy requirement for active regeneration. However, with the addition of EGR, the lower filtration efficiencies of nanoparticles should be concerned, especially fueling with diesel/PODEn mixture.

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Influence of injection parameters on combustion, gaseous emissions and particle size distribution of a CRDI diesel engine operating with PODE/diesel blends

Cited by 31 publications

References 49 publications

Experimental study on the effects of blending PODEn on performance, combustion and emission characteristics of heavy-duty diesel engines meeting China VI emission standard

Experimental study on the effects of blending PODEn on performance, combustion and emission characteristics of heavy-duty diesel engines meeting China VI emission standard

Influence of Combustion Chamber Shapes and Nozzle Geometry on Performance, Emission, and Combustion Characteristics of CRDI Engine Powered with Biodiesel Blends

Filtration Efficiency and Regeneration Behavior in a Catalytic Diesel Particulate Filter with the Use of Diesel/Polyoxymethylene Dimethyl Ether Mixture

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