The influence of ash on soot deposition and regeneration processes in diesel particular filter

Fang, Jia; Meng, Zhongwei; Jian, Li; Pu, Yunfei; Du, Yuheng; Li, Jiansong; Jin, Zhaoxiang; Chen, Chao; Chase, George G.

doi:10.1016/j.applthermaleng.2017.06.076

Cited by 75 publications

(37 citation statements)

References 22 publications

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“…6 (diesel middle bus, China IV) with EGR + DPF were 99.06% and 99.52% less than those of No. 5 (diesel middle bus, China III), respectively, which were found to be consistent with the reported studies [62][63][64]. Simultaneously, the EGR significantly decreased the average temperature of in-cylinder and inhibited the oxidation of S (elemental sulfur) into SO 2 (sulfur dioxide), thus reducing the formation of nucleation-mode particles [65].…”

Section: The Average Pn Size and Particle Mode Distributionsupporting

confidence: 89%

Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements

Mao

et al. 2020

Atmosphere

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Previous works on real-world vehicle emission characteristics have mainly focused on the influences of fuel, speed, vehicle type, elevation, and other factors on vehicle emission quantity and components. However, few studies have investigated the transient trend of automotive exhaust emissions through on-road measurements. The key objective of the present paper was to examine the transient characteristics of exhaust emissions from different vehicle types on the roads of Tianjin. To achieve the goal, a portable emission measurement system (PEMS) was employed to monitor emissions from selected test vehicles—private cars, passenger vehicles, and cargo vehicles. It was found that the high-emission points of test vehicles were mainly distributed in two regions: the high-speed region (speed > 70–90 km/h, vehicle-specific power (VSP) > 0 kW/t) and the medium-speed–acceleration region (20–30 km/h < speed < 60–90 km/h, 0 kW/t <VSP < 12 kW/t). The CO, hydrocarbon (HC), NOx, and particulate number (PN) average emission rates in the high-emission points could be 3.15–14.93 times, 1.93–24.89 times, 3.23–6.03 times, and 3.22–30.27 times of those of average emission rates. The HC, NOx, and PN average emission rates of China IV vehicles in the high-emission points were 2.46–4.92 times, 3.56–6.03 times, and 3.22–13.21 times of those of average emission rates, not less than those of China III (1.93–2.52 times, 2.75–3.90 times, and 9.98–22.34 times). Test vehicles mainly emitted nucleation-mode and Aitken-mode particles, and the increase of the PN concentration emission rate in low-speed and high-speed regions was higher than that in the medium-speed region. The exhaust gas recirculation (EGR) + diesel particulate filter (DPF) could effectively inhibit the Aitken output caused by turbocharged intercooler (CIC). The selective catalytic reduction (SCR) might cause more nucleation-mode particles.

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Section: The Average Pn Size and Particle Mode Distributionsupporting

confidence: 89%

Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements

Mao

et al. 2020

Atmosphere

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“…In this case, different solutions have been focused from several point of views: gas exchange processes, injection systems and after treatment devices. These common after treatment devices are: exhaust gases recirculation (EGR) [8][9][10][11][12][13][14], diesel particulate filter (DPF) [15,16] and the selective catalysts systems also known as SCR (Selective Catalytic Reduction) [17,18].…”

Section: Introductionmentioning

confidence: 99%

Study of the influence of emission control strategies on the soot content and fuel dilution in engine oil

Tormos

Novella

Gómez-Soriano

et al. 2019

Tribology International

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The engine oil contamination by both particulate matter (PM) and fuel is becoming an important problem since strategies to control pollutant emissions in internal combustion engines (ICE) significantly increase their presence in engine oil. As a consequence, the engine oil loses its tribological properties compromising engine lubrication and leading to potential problems in engine such as wear, corrosion, etc. For that reason, the study of the oil degradation and contamination due to these strategies have a special interest to the engine manufacturers and engine oil formulators. In this paper, the engine oil soot content and fuel dilution is analysed under real engine conditions. The study is addressed from two different but complementary points of views. First, on-line measurements at several engine operating conditions are performed in order to further understand how the soot generation correlates with the oil soot content and other derived problems on oil performance. Then, experimental data available after the experimental campaign is used to calibrate a numerical model, based on Computational Fluid Dynamics (CFD), that estimate the amount of soot particles settled in the engine oil. Results show that soot particles are more present in oil when operating high load-speed conditions and during the Diesel Particulate Filter (DPF) regeneration cycles. Regarding the fuel dilution, delayed post-injections are critical since they significantly increase the amount of fuel in the engine oil. Numerical results also show the relationships between the soot particles generated during combustion and the amount of soot in engine oil, giving an enhanced comprehension of soot-in-oil deposition mechanisms.

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“…13 As one of the main sources of air contamination, the prevalent diesel engine is a contributor of PM 14 in spite of its high thermal efficiency, reliability and fuel economy. 15 In order to balance the increasingly restrictive regulations on vehicle exhaust, techniques to purify diesel emission have become diverse, 16 such as exhaust gas recirculation (EGR), 17 diesel particulate ltering (DPF), 18 selective catalyst reduction (SCR) 19 and diesel oxidation catalysis (DOC). 20 Among them, DPF is considered the most effective technology towards PM reduction with a capturing efficiency of more than 95%.…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric analysis of soot combustion in the presence of ash and soluble organic fraction

et al. 2020

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The influence of ash on soot deposition and regeneration processes in diesel particular filter

Cited by 75 publications

References 22 publications

Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements

Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements

Study of the influence of emission control strategies on the soot content and fuel dilution in engine oil

Thermogravimetric analysis of soot combustion in the presence of ash and soluble organic fraction

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