Dependence of Fuel Consumption on Engine Backpressure Generated by a DPF

Mikulic, Ingo; Zhan, Reggie; Eakle, Scott

doi:10.4271/2010-01-0535

Cited by 22 publications

(8 citation statements)

References 3 publications

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“…Moreover, different DPF designs can lead to different engine back pressure and fuel consumption levels [17]. According to the experimental tests results of Mikulic et al, the Acicular Mullite (ACM) DPF caused less engine back pressure than commercially-available cordierite DPF (Cd DPF) and led to a fuel saving of 0.4% to 2.0%.…”

Section: Dpf Pressure Dropmentioning

confidence: 99%

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The state-of-the-art of soot load estimation in diesel particulate filters: A review

Yan

Cai

2021

E3S Web Conf.

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Diesel particulate filter (DPF), as part of aftertreatment system of internal combustion engine, is considered to be the only feasible way to prominently lessen particle emissions under the requirement of today’s strict regulations such as Euro Ⅵ, US Tier 3 and China Ⅵ. This paper gives a brief introduction of the mechanism and regeneration approaches of DPF, with emphasis on soot load estimation inside the filters, which plays a vital role in formulating regeneration control strategy and ensuring exhaust systemic dependability. Various methods are covered according to different principles, including differential-pressure based methods, which are mostly used nowadays, novel model-based methods and also several newfangled soot sensors, which are progressively developed to meet the increasingly stringent on-board diagnosis (OBD) requirements. The focus of future soot detection and quantitative prediction is to improve accuracy, reliability and robustness, which may necessitate consideration of soot distribution, ash effect, failure identification and fault tolerance handling.

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Section: Dpf Pressure Dropmentioning

confidence: 99%

“…Figure17. DPF pressure drop as a function of the particulate layer porosity and the soot mass distribution onset imposing a linear soot mass distribution[42].…”

mentioning

confidence: 99%

The state-of-the-art of soot load estimation in diesel particulate filters: A review

Yan

Cai

2021

E3S Web Conf.

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“…In that process, called regeneration, the trapped soot is incinerated, and the process can occur discretely when a certain quantity of soot has been captured, or continuously over regular operation. [19][20][21] In the loading process, two internal phenomena occur simultaneously: soot accumulation and ash accumulation. Soot accumulation occurs over short periods, within the time scale of a few hours, and ends with the regeneration process.…”

Section: Introductionmentioning

confidence: 99%

“…Both kinds of filter are made of materials specifically designed to hold a certain quantity of PM, and during the loading process the accumulation of PM slowly creates a restriction to the flow, increasing the pressure drop across the filter, which could eventually result in clogging of the filter and have a negative impact on engine operation. 12,19,20 Therefore, PF systems need a cleaning process to remove trapped PM and rehabilitate their soot collection capacity so that proper engine operation is guaranteed. In that process, called regeneration, the trapped soot is incinerated, and the process can occur discretely when a certain quantity of soot has been captured, or continuously over regular operation.…”

Section: Introductionmentioning

confidence: 99%

A study of the early life of gasoline particulate filters: Reactive and dissipative acoustic effects

Torregrosa

Morena

Sanchis

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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The presence of after-treatment systems (ATS) has some side effects as they modify the wave dynamics, back-pressure and acoustic behavior of the exhaust system, that define the boundary conditions for the main silencing device. Gasoline particulate filters (GPF) have a considerable influence on these traits as their working principle depends on wall-flow monoliths; additionally, particulate filters have an inherent transient behavior due to the loading-regeneration cycles during their operation. In this paper, the steady and unsteady behavior of a typical device containing a three-way catalyst (TWC) and a GPF has been characterized in "new" (prior to any use) and "used" (after regeneration) conditions, with special focus on the role of dissipation. Pressure drop measurements were used in steady flow, whereas an acoustic energy balance was performed in the unsteady case that allows for the identification of the reactive and dissipative contributions. The results obtained for the GPF suggest that after it has been used for a relatively short time it oscillates between a maximum and a minimum loading over load–regeneration cycles burning the soot, never reaching back brand–new cleanness due to accumulation into the substrate pores and only suffering from ash accumulation over very long times. The results were then used to analyze the ability of a standard gas-dynamic code to reproduce the influence of the loading on the reactive and dissipative effects observed, with the main conclusion that by properly tuning the model parameters it is possible to reproduce, at least qualitatively, the trends observed in the experiments. The model can thus be used to provide adequate inlet conditions for the design of the exhaust line.

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“…2,3 However, if a large quantity of PM accumulates inside a DPF, the back pressure increases and power decreases, resulting in a reduction in engine performance to avoid such phenomena, DPF regeneration by a process that burns the collected soot periodically is required. 4,5…”

Section: Introductionmentioning

confidence: 99%

Comparison of intake and exhaust throttling for diesel particulate filter active regeneration of non-road diesel engine with mechanical fuel injection pump

Pyo¹,

Kim

2020

International Journal of Engine Research

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Diesel particulate filter regeneration using intake and exhaust throttling is technically simple and economically efficient compared to other methods. The purpose of this study is to investigate not only the reasons for the increase in exhaust temperature during intake or exhaust throttling but also their feasibility as a diesel particulate filter regeneration technology. In this study, a non-road diesel engine having a mechanical fuel injection pump was used for experiments. The changes in exhaust temperatures were measured during intake and exhaust throttling for the no-load maximum revolutions per minute engine condition. The experimental results exhibited that both intake and exhaust throttling reduced the intake air mass flow rate and increased piston pumping, which then increased fuel consumption. These effects were the primary reasons for increasing the temperature of exhaust gases. In particular, intake throttling was more effective than exhaust throttling in terms of reducing the intake air mass flow rate. However, exhaust throttling caused larger pumping losses, resulting in higher fuel consumption. Furthermore, in case of exhaust throttling, engine combustion was possible even at high equivalence ratios because of the larger amounts of residual gases in the combustion chamber. In summary, exhaust throttling is more effective for regenerating a diesel particulate filter at a high temperature than intake throttling. In addition, this study verified the feasibility of diesel particulate filter regeneration using exhaust throttling through analyses of diesel particulate filter regeneration efficiency, fuel consumption, and exhaust concentration when regenerating the diesel particulate filter by increasing the exhaust temperature through exhaust throttling.

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Dependence of Fuel Consumption on Engine Backpressure Generated by a DPF

Cited by 22 publications

References 3 publications

The state-of-the-art of soot load estimation in diesel particulate filters: A review

The state-of-the-art of soot load estimation in diesel particulate filters: A review

A study of the early life of gasoline particulate filters: Reactive and dissipative acoustic effects

Comparison of intake and exhaust throttling for diesel particulate filter active regeneration of non-road diesel engine with mechanical fuel injection pump

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