An Experimental Investigation of the Impact of Washcoat Composition on Gasoline Particulate Filter (GPF) Performance

Wang, Junjun; Yan, Fuwu; Fang, Na; Yan, Dong; Zhang, Guoqing; Wang, Yu; Yang, Wulin

doi:10.3390/en13030693

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…Figure 5 shows National Ⅵ emission standard limits on the quantity and quality of particulate matter. The test results of both oils show that they meet the emission durability requirements, which are lower than the regulatory limit of 6.0×10 11 . Comparing the PN value, the first 70h oil F has a higher trapping efficiency, and the oil C has a higher trapping efficiency after 70h, which corresponds to a lower PN value after GPF.…”

Section: Vehicle Emission and Fuel Consumption Performancementioning

confidence: 83%

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Effect of different lubricating oil formulas on the adaptability of cGPF aftertreatment

Yang

Wang

et al. 2021

E3S Web Conf.

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Based on two different components of lubricating oil, this paper analyzes the filtration efficiency, ash accumulation speed, vehicle WLTC emissions, fuel consumption, and CT scan on a National V emission standard engine equipped with a cGPF aftertreatment device. The results show that both oils can ensure that cGPF meets the emission and fuel consumption requirements of National VI emission standard, but oil F accumulates ash quickly before the ash accumulation of 33% in the discharge, which has a significant effect on PN reduction, and oil C accumulates ash faster after the accumulation of 33%. The effect of reducing the PN is accelerated. Oil F is based on a full calcium detergent system, which has a trend of first to slower for the collection efficiency; while oil C is based on a mixed Ca/Mg detergent system, which has a trend of first slowing and then fasting the collection efficiency. The critical point is generally about 33% of accumulated ash. For oil F, less ash is deposited in the front and middle of the cGPF, while more ash tends to deposit towards the outlet. In contrast, cGPF aged with Oil C has a relatively uniform deposition distribution.

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Section: Vehicle Emission and Fuel Consumption Performancementioning

confidence: 83%

“…[10] . Unlike the soot, ash can not be regenerated [11] . As a result the deposition of ash and its interaction with cGPF(including substrate and catalyst coatings) may have an impact on hardware performance and durability [12] .…”

Section: Post-test Analysismentioning

confidence: 99%

Effect of different lubricating oil formulas on the adaptability of cGPF aftertreatment

Yang

Wang

et al. 2021

E3S Web Conf.

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“…In the last years, a lot of research has been conducted for GPFs to optimize their efficiency and performance. Topics included filter structure [10], flow field [11], filter material [12], in particular for soot oxidation at absence of NO x and O 2 [13,14], soot storage and oxidation [15,16], oxygen storage [17], ash loading [18], and washcoat [19]. Typically, the temperature at the GPFs is high enough to oxidize the soot when there is available oxygen (e.g., during fuel cut-offs) [20].…”

Section: Introductionmentioning

confidence: 99%

Challenging Conditions for Gasoline Particulate Filters (GPFs)

et al. 2022

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The emission limit of non-volatile particles (i.e., particles that do not evaporate at 350 °C) with size >23 nm, in combination with the real driving emissions (RDE) regulation in 2017, resulted in the introduction of gasoline particulate filters (GPFs) in all light-duty vehicles with gasoline direct injection engines in Europe. Even though there are studies that have examined the particulate emissions at or beyond the current RDE boundary conditions, there is a lack of studies combining most or all worst cases (i.e., conditions that increase the emissions). In this study, we challenged a fresh (i.e., no accumulation of soot or ash) “advanced” prototype GPF at different temperatures (down to −9 °C), aggressive drive cycles and hard accelerations (beyond the RDE limits), high payload (up to 90%), use of all auxiliaries (air conditioning, heating of the seats and the rear window), and cold starts independently or simultaneously. Under hot engine conditions, the increase of the particulate emissions due to higher payload and lower ambient temperature was 30–90%. The cold start at low ambient temperature, however, had an effect on the emissions of up to a factor of 20 for particles >23 nm or 300 when considering particles <23 nm. We proposed that the reason for these high emissions was the incomplete combustion and the low efficiency of the three-way oxidation catalyst. This resulted in a high concentration of species that were in the gaseous phase at the high temperature of the close-coupled GPF and thus could not be filtered by the GPF. As the exhaust gas cooled down, these precursor species formed particles that could not be evaporated at 350 °C (the temperature of the particle number system). These results highlight the importance of the proper calibration of the engine out emissions at all conditions, even when a GPF is installed.

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“…Nowadays, automotive research is focused on developing innovative solutions such as engine downsizing [1][2][3], cooled external exhaust gas recirculation (EGR) [4,5], water injection [6], and lean mixture operations [7,8], to satisfy both the stringent regulations of pollutant emissions and customer requirements [9,10].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Lean Stable Limit of a Barrier Discharge Igniter and of a Streamer-Type Corona Igniter at Different Engine Loads in a Single-Cylinder Research Engine

Ricci

Petrucci

Cruccolini

et al. 2020

The First World Energies Forum—Current and Future Energy Issues

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Currently, the Radio-Frequency Corona Ignition systems represent an important solution for reducing pollutant emissions and fuel consumption related to Internal Combustion Engines, while at the same time ensuring high performance. These igniters are able to extend the lean stable limit by increasing the early flame growth speed. Kinetic, thermal, and ionic effects, together with the peculiar configuration of the devices, allow the combustion process to start in a wider region than the one involved with the traditional spark. In this work two corona igniters, namely a Barrier Discharge Igniter and a Corona Streamer Igniter, were tested in a single-cylinder research engine fueled with gasoline at different engine loads in order to investigate the igniters’ performance through indicated analysis and pollutant emissions analysis. For each operating point, the devices’ control parameters were set to ensure maximum energy releasement into the medium with the aim of investigating, at the extreme operating conditions, the capability of the devices to extend the lean stable limit of the engine. The corona igniters were tested on a constant volume calorimeter as well, reproducing the engine pressure conditions at the corresponding ignition timing. The target was to give an estimation of the thermal energy released during the discharge and then to compare their capability to provide high-stability energy.

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An Experimental Investigation of the Impact of Washcoat Composition on Gasoline Particulate Filter (GPF) Performance

Cited by 6 publications

References 12 publications

Effect of different lubricating oil formulas on the adaptability of cGPF aftertreatment

Effect of different lubricating oil formulas on the adaptability of cGPF aftertreatment

Challenging Conditions for Gasoline Particulate Filters (GPFs)

Investigation of the Lean Stable Limit of a Barrier Discharge Igniter and of a Streamer-Type Corona Igniter at Different Engine Loads in a Single-Cylinder Research Engine

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