Optimization of Dual Loop EGR of a V6 3.0 Liter Diesel Engine for CO2 Reduction

Lee, Haewook; Jo, Chunghoon; Yoon, Seungsuk; Yi, Seyoung; Kim, Yangrae; Jeon, Jong-Ik

doi:10.4271/2013-01-0316

Cited by 7 publications

(4 citation statements)

References 6 publications

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“…To evaluate the effect of H 2 O in the diesel exhaust, the experiments were also performed in the absence of H 2 O. Although CO 2 and CO are also present in diesel exhaust [44][45][46], these gases were not included in the feed gas in this study because it was found that they have no effect on CaSO 4 formation according to the preliminary experiment. The temperature in the reactor during the reaction was xed at 700°C, referring to the temperature during DPF regeneration [9,10].…”

Section: Experimental and Analytical Methodsmentioning

confidence: 99%

An Experimental Study on the Conversion of CaO to CaSO4 During Diesel Particulate Filter Regeneration

TANAKA

Sakai

Ishii

et al. 2023

Emiss. Control Sci. Technol.

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The deposition of ash on a diesel particulate lter (DPF) results in an increase in pressure drop across aftertreatment system, which leads to reduced capacity for soot and an increase in frequency of regeneration to eliminate the soot. To estimate the amount of ash and design a reduction method for the accumulated ash on the DPF, a deeper understanding of the ash generation mechanism is required.Previous studies have found that ash sampled at exhaust manifolds mainly comprises typical metal oxides, whereas ash accumulated on DPFs primarily comprises typical metal sulfates. However, the conversion mechanism from metal oxides to metal sulfates is not well understood. Herein, the formation mechanism of calcium sulfate (CaSO 4 ), which is the main component of ash on DPFs, was investigated using a ow reactor. Calcium oxide (CaO), which is the main component of ash sampled at exhaust manifolds, was made to react with SO 2 , SO 3 , O 2 , and H 2 O, when passed through a diesel oxidation catalyst. Quantitative analysis of the ash components in the products was performed using highperformance liquid chromatography. The concentrations of SO 2 , SO 3 , and H 2 O during the reaction were analyzed by Fourier-transform infrared spectroscopy. Based on the experimental results, it was found that CaSO 4 mainly formed from the reaction of CaO with SO 2 and SO 3 ; whereas, H 2 O inhibited CaSO 4 formation owing to the change in physicochemical properties of CaO.

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Section: Experimental and Analytical Methodsmentioning

confidence: 99%

An Experimental Study on the Conversion of CaO to CaSO4 During Diesel Particulate Filter Regeneration

TANAKA

Sakai

Ishii

et al. 2023

Emiss. Control Sci. Technol.

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show abstract

“…Please go through spelling errors and cross-reference errors that are present throughout the paper and fix them: e.g. in page 1, second column, second sentence "In [8] Please use "handle" rather than "cope". E.g.…”

Section: Contact Informationmentioning

confidence: 99%

“…On the other hand, LP-EGR ensures an adequate mixture of exhaust gases and air before entering the cylinders and it also manages lower temperatures and pressure than HP-EGR, which might improve the trade-off between NOx and efficiency. However, it has slower dynamics and it usually requires an additional valve to ensure positive differential pressure between the turbine outlet and the compressor inlet [2][5] [6][7] [8].…”

Section: Introductionmentioning

confidence: 99%

“…Experimental results showed that the addition of LP-EGR in a dual-mode system can lead to high efficiency and clean combustion under various operating conditions. In [8] a 6% CO2 reduction was achieved with the addition of the LP-EGR loop, while in [9] a reduction between 51% and 64% for NOx emissions was obtained (referring to the standard engine behaviour in Euro 5 configuration). In [10], the authors showed an improvement in brake thermal efficiency when using dual-loop EGR in all the conditions tested.…”

Section: Introductionmentioning

confidence: 99%

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Optimal Sensor Placement for High Pressure and Low Pressure EGR Estimation

Luján

Plá

Bares

et al. 2021

SAE Technical Paper Series

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Low pressure exhaust gases recirculation (LP-EGR) is becoming a state-of-the-art technique for Nitrogen oxides (NOx) reduction in compression ignited (CI) engines. However, despite the pollutant reduction benefits, LP-EGR suffers from strong non-linearities and delays which are difficult to handle, resulting in reduced engine performance under certain conditions. Measurement and observation of oxygen concentration at the intake have been a research topic over the past few years, and it may be critical for transition phases (from low pressure to high pressure EGR). Here, an adequate selection of models and sensors is essential to obtain a precise and fast measurement for control purposes. The present paper analyses different sensor configurations, with oxygen concentration measurements at the intake and exhaust manifold and combines observation techniques with sensor models to determine the potential of each configuration. Experimental results from a 2.2 l. diesel engine are used to validate the presented techniques.

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Numerical investigation of a dual-loop EGR split strategy using a split index and multi-objective Pareto optimization

Park

Lee

2015

Applied Energy

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Optimization of Dual Loop EGR of a V6 3.0 Liter Diesel Engine for CO2 Reduction

Cited by 7 publications

References 6 publications

An Experimental Study on the Conversion of CaO to CaSO4 During Diesel Particulate Filter Regeneration

An Experimental Study on the Conversion of CaO to CaSO4 During Diesel Particulate Filter Regeneration

Optimal Sensor Placement for High Pressure and Low Pressure EGR Estimation

Numerical investigation of a dual-loop EGR split strategy using a split index and multi-objective Pareto optimization

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