Gasoline Particle Filter Development

Lambert, Christine; Chanko, Timothy; Dobson, Douglas; Liu, Xin; Pakko, James

doi:10.1007/s40825-016-0055-x

Cited by 51 publications

(41 citation statements)

References 5 publications

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“…However, the stringent Euro 6 emissions standards resulted in an increased interest in GPF (Gasoline Particular Filter) technology. Although the wall-flow filter geometry is similar to Diesel Particulate Filter (DPF) and Selective Catalyst Reduction Filter (SCRF) geometries, there are differences in structure, operating conditions (mass flow rates, temperatures, regeneration regime [2]) and wall properties (thickness, porosity, pore size). Therefore, separate studies of GPF pressure losses and flow uniformity are needed to improve predictions offered by existing DPF/SCRF research, and to provide adequate models for CAE analysis.…”

Section: Introductionmentioning

confidence: 99%

“…[13], [14]), and calculating permeability from experiments (see e.g. [2], [7], [8], [15], [16]). Comprehensive reviews of available models and pressure loss descriptors are available in many papers (for example, [16]), and therefore not repeated here.…”

Section: Introductionmentioning

confidence: 99%

“…To eliminate the uncertainty associated with estimating losses from friction, expansion and contraction, several authors used wafer samples ( [2], [17], [18], [21]). Lambert et all [2] quote permeability values derived from wafer testing, with wafers obtained from filter substrates. However, no details of sample preparation and quality, error/variability estimates or description of the experiments are provided.…”

Section: Introductionmentioning

confidence: 99%

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Gasoline Particulate Filter Wall Permeability Testing

Aleksandrova

Saul

Medina

et al. 2018

SAE Int. J. Engines

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gasoline Particulate Filter Wall Permeability Testing

Aleksandrova

Saul

Medina

et al. 2018

SAE Int. J. Engines

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“…The accumulation of soot inside and on the porous walls of the filter [8] aggravates these effects and leads the engine specific fuel consumption to increase [9]. For this reason, and taking into account the limited capacity of the filter for soot accumulation [10], after a certain operating time it is necessary to induce a regeneration process consisting of the oxidation of the soot particulates stored inside the filter [11]. Two different strategies are used for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Late Fuel Post-Injection Influence on the Dynamics and Efficiency of Wall-Flow Particulate Filters Regeneration

et al. 2019

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Late fuel post-injections are the most usual strategy to reach high exhaust temperature for the active regeneration of diesel particulate filters. However, it is important to optimise these strategies in order to mitigate their negative effect on the engine fuel consumption. This work aims at understanding the influence of the post-injection parameters, such as its start of injection and its fuel quantity, on the duration of the regeneration event and the fuel consumption along it. For this purpose, a set of computational models are employed to figure out in a holistic way the involved phenomena in the interaction between the engine and the exhaust gas aftertreatment system. Firstly, an engine model is implemented to evaluate the effect of the late fuel post-injection pattern on the gas properties at the exhaust aftertreatment system inlet in different steady-state operating conditions. These are selected to provide representative boundary conditions of the exhaust gas flow concerning dwell time, exhaust temperature and O 2 concentration. In this way, the results are later applied to the analysis of the diesel oxidation catalyst and wall-flow particulate filter responses. The dependence of the diesel particulate filter (DPF) inlet temperature is discussed based on the efficiency of each post-injection strategy to increase the exhaust gas temperature. Next, the influence on the dynamics of the regeneration of the post-injection parameters through the change in gas temperature and O 2 concentration is finally studied distinguishing the pre-heating, maximum reactivity and late soot oxidation stages as well as the required fuel consumption to complete the regeneration process.

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“…Especially for automotive equipment, technology development has been continued to improve energy efficiency. For example, in a honeycomb monolith reactor [15] and wall flow ceramic filters [16], which are widely utilized in automotive exhaust gas after treatment systems, improvements were reported. Interestingly, as a case in which working fluids other than the continuum were used, numerical simulations of dilute flows in microchannels using the lattice Boltzmann method [17] were performed.…”

mentioning

confidence: 99%

Quasi-Periodic Oscillating Flows in a Channel with a Suddenly Expanded Section

Masuda

Tagawa

2019

Symmetry

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In this study, two-dimensional numerical simulation was carried out for an oscillatory flow between parallel flat plates having a suddenly expanded section. Governing equations were discretized with the second-order accuracy by a finite volume method on an unequal interval mesh system resolving finer near walls and corners to obtain the characteristics of the oscillatory flow accurately. Amplitude spectrums of a velocity component were obtained to investigate the periodic characteristics of the oscillatory flow. At low Reynolds numbers, the flow is periodic because the spectrum mostly consists of harmonic components, and then at high Reynolds numbers, it transits to a quasi-periodic flow mixed with non-harmonic components. In conjunction with the periodic oscillation of a main flow, separation vortices that are not uniform in size are generated from the corner of a sudden contraction part and pass through a downstream region coming into contact with the wall. The number of the vortices decreases rapidly after they are generated, but the vortices are generated again in the downstream region. In order to specify where aperiodicity is generated, the turbulent kinetic energy is introduced, and it is decomposed into the harmonic and non-harmonic components. The peaks of the non-harmonic component are generated in the region of the expanded section.

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Gasoline Particle Filter Development

Cited by 51 publications

References 5 publications

Gasoline Particulate Filter Wall Permeability Testing

Gasoline Particulate Filter Wall Permeability Testing

Late Fuel Post-Injection Influence on the Dynamics and Efficiency of Wall-Flow Particulate Filters Regeneration

Quasi-Periodic Oscillating Flows in a Channel with a Suddenly Expanded Section

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