Influence of high and low pressure EGR and VGT control on in-cylinder pressure diagrams and rate of heat release in an automotive turbocharged diesel engine

Zamboni, Giorgio; Capobianco, Massimo

doi:10.1016/j.applthermaleng.2012.09.040

Cited by 63 publications

(32 citation statements)

References 23 publications

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“…The combustion duration for the HP-EGR and LP-EGR configurations is calculated using: [2] Comparing the results for the three different intake plate configurations, it could be determined if the EGR dispersion has an important effect on NOx emissions and fuel consumption.…”

Section: Analytical Methodologymentioning

confidence: 99%

Exhaust gas recirculation dispersion analysis using in-cylinder pressure measurements in automotive diesel engines

Luján

Climent

Plá

et al. 2015

Applied Thermal Engineering

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Section: Analytical Methodologymentioning

confidence: 99%

Exhaust gas recirculation dispersion analysis using in-cylinder pressure measurements in automotive diesel engines

Luján

Climent

Plá

et al. 2015

Applied Thermal Engineering

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“…A trial think about was created to look at high and low weight fumes gas distribution frameworks (HP and LP EGR) fitted on a car turbocharged diesel motor. The outcomes watched patterns of fuel utilization, NOx and ash emanations as indicated by the weight charts and warmth discharge bends, as LP EGR and an alternate VGT position permitted diminishments of 2.1, 50 and 22.8% of these parameters (Zamboni ,2012(Zamboni , , 2013Romagnoli , 2012).Characterization of a spiral turbocharger turbine in throbbing stream was considered numerically, the outcomes demonstrated that the stator spouts cause less aggregation impacts than the volute, yet show a little level of hysteretic conduct because of stream detachment and reattachment cycle around the vanes (Galindo, 2013) . Progressed numerical and experimental techniques for the extension of a turbine mapping were examined, The model henceforth demonstrates the possibility to defeated the restrictions of a traditional test-fix for a turbine mapping.The comes about are in addition approved against writing inferred 3D CFD reproduction findings (Bellis & Chiong ,2013).…”

Section: Introductionmentioning

confidence: 99%

Numerical Prediction of a Radial Turbine Performance designed for Automotive Engines Turbocharger

Jawad¹

2018

JUBES

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These days the turbocharging system is assuming an essential part in enhancing car engines performance and diminishing fuel utilization and the fumes emanations, in spark-ignition and compression ignition engines. The performance of a radial turbine for the turbocharger device is heavily affected by the flow dynamics in a radial impeller. Furthermore, modification and improvement of a radial turbine impeller is a challenging task for turbomachinery engineers. Hence, this study aimed to further computational fluid dynamic analyses of a radial turbine stage performance .The design characteristics of a radial turbine stage, was used to simulate the flow by using independent packages of ANSYS CFX. The comparative study of a three dimensional flow simulation will give a more reasonable results of the turbine stage flow behavior and computational fluid dynamic simulation can give a more detailed result and reveal unexpected flow behavior like separation and vortexes.The results showed that the fluid flow dynamics within a turbine stage has indicated a noticeable performance characteristics. Obviously, it was observed that the pressure ratio and volume flow rate and efficiency were predicted numerically. Overall numerical results obtained from computational fluid dynamic simulations could produce a highly reliable for estimation on the performance a radial turbine of turbocharger.

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“…Lean burn is one of the most effective ways to decrease NOx emissions in engine fueled with methanol. It can decrease NOx emissions by changing the heat capacity of the mixture, reducing in-cylinder temperature and slowing down flame speed [16][17][18]. In addition, a larger throttle percentage is in favor of reducing throttle pump loss.…”

mentioning

confidence: 99%

Experimental Investigation of Diluents Components on Performance and Emissions of a High Compression Ratio Methanol SI Engine

et al. 2019

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Increasing compression ratio and using lean burn are two effective techniques for improving engine performance. Methanol has a wide range of sources and is a kind of suitable fuel for a high-compression ratio spark-ignition lean burn engine. Lean burn mainly has a dilution effect, thermal effect and chemical effect. To clarify the influences of different effects and provide guidance for improving composition of dilution gases and applications of this technology, this paper chose Ar, N 2 and CO 2 as diluents. A spark-ignition methanol engine modified from a diesel engine with a compression ratio of 17.5 was used for the experiments. The results obtained by using methanol spark ignition combustion indicated that at engine speed of 1400 rpm and 25% load, NOx dropped by up to 77.5%, 100% and 100% by Ar, CO 2 and N 2 . Gases with higher specific heat ratio and lower heat capacity represented by Ar exhibited the least adverse effect on combustion and showed a downward break-specific fuel consumption (BSFC) trend. Gas with high specific heat capacity represented by CO 2 can decrease NOx and total hydro carbons (THC) emissions at the same time, but the BSFC of CO 2 showed the worst trend, followed by N 2 . Gas affecting the combustion process like CO 2 had chemical effect.Energies 2019, 12, 3366 2 of 18 on a SI engine. Dinesh Kumar Soni et al. [8] changed the blending ratio of methanol in diesel and found a 30% methanol blending ratio achieved a maximum reduction of NOx, CO and HC emissions (27%, 58% and 65%, respectively) compared to original diesel fuel on a CI engine. Erik [9] et al. showed that the emission of soot is non-existent and formaldehyde can be avoided on an engine running in partially premixed combustion (PPC) mode at medium loads, however CO and NOx emissions are not significantly improved. But in general, methanol is widely used in an SI engine for its high octane rating [10].The increasing compression ratio (CR) is a promising approach matched with enhancing thermal efficiency and reducing emissions of the engine. G. Di Blasio [11] et al. demonstrated CR is an important design parameter, which is closely related to the methane unburnt (MHC) on methane-diesel light-duty engine. Srivastava [12] et al. found increasing CR showed benefit on decreasing mean effective pressure cyclic variation (COV IMEP ) and break-specific fuel consumption (BSFC), a higher CR can also expand the lean flammability limit of λ from 1.62 to 1.76 which provides favorable conditions for lean burn. Ibrahim et al. [13] have found that when exhaust gas was employed for dilution on a natural gas SI engine, the fuel consumption rate could be reduced by about 10% with CR increased from 8 to 10. However, knock is a major obstacle for further increasing CR in the SI engine, and running engine with fuel has high octane number is an effective solution, as methanol exactly meets this condition [14]. M. Bahattin [15] et al. increased CR from 6 to 10 by fuelling with methanol then discovered the brake thermal efficiency of engine fueled with m...

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Influence of high and low pressure EGR and VGT control on in-cylinder pressure diagrams and rate of heat release in an automotive turbocharged diesel engine

Cited by 63 publications

References 23 publications

Exhaust gas recirculation dispersion analysis using in-cylinder pressure measurements in automotive diesel engines

Exhaust gas recirculation dispersion analysis using in-cylinder pressure measurements in automotive diesel engines

Numerical Prediction of a Radial Turbine Performance designed for Automotive Engines Turbocharger

Experimental Investigation of Diluents Components on Performance and Emissions of a High Compression Ratio Methanol SI Engine

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