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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"Diesel Particulate Filter"”.
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An improved visualization of diesel particulate filter/
The prevalence of diesel particulate filters (DPF) is increasing as emissions standards worldwide evolve to match current technologies. Since the first application of DPFs in the 1980's, PM trapping effectiveness has increased by orders of magnitude. During the filter's use phase, it is subject to …
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Characteristics of particles downstream of a partially failed diesel particulate filter.
A diesel particulate filter (DPF) can be used to reduce the particulate matter (PM) emissions from a vehicle. However, when these devices fail the tailpipe emissions can change. The main goal of this project was to determine if a soot sensor provided by Honeywell could detect a failed filter, …
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Characterizing ash properties and effects on Diesel Particulate Filter flow resistance
… of increasingly stringent emissions regulations, Diesel Particulate Filters (DPF) have become a widespread method of reducing particulate emissions in both on and off highway diesel engine use. This particular aftertreatment system is chosen for its high filtration efficiency and relative …
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Passive regeneration : long-term effects on ash characteristics and diesel particulate filter performance
Diesel particulate filters (DPF) have seen widespread growth as an effective means for meeting increasingly rigorous particle emissions regulations. There is growing interest to exploit passive regeneration of DPFs to reduce fuel consumption accompanying traditional active regeneration. …
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Microscopy investigations of ash and particulate matter accumulation in diesel particulate filter surface pores
… have resulted in the creation of more stringent particulate matter emissions regulations in the United States and European Union. These limits have forced diesel engine manufacturers to reduce particulate matter (PM) emissions by an order of magnitude beginning in 2007. Diesel particulate filters …
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Modeling and interpreting the observed effects of ash on diesel particulate filter performance and regeneration
Diesel particulate filters (DPF) are devices that physically capture diesel particulates to prevent their release to the atmosphere. Diesel particulate filters have seen widespread use in on- and off-road applications as an effective means for meeting increasingly stringent particle emissions …
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Synergistic effects of lubricant additive chemistry on ash properties impacting diesel particulate filter flow resistance and catalyst performance
Diesel particulate filters (DPF) have seen widespread use in recent years in both on- and offroad applications as an effective means for meeting the increasingly stringent particulate emission regulations. Overtime, engine-out particulate matter composed of soot and incombustible ash accumulate …
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Investigations of ash layer characteristics and ash distribution in a diesel particulate filter using novel lubricant additive tracers
Diesel particulate filters (DPF) are currently widely used in various applications as a means of collecting particulate matter in order to meet increasingly stringent particle emissions regulations. Over time, the DPF slowly accumulates incombustible material or ash, mostly from the metallic …
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Performance effects and causal mechanisms of mid-channel congestion in diesel particulate filters
The diesel particulate filter (DPF) is a ~$5,000-$50,000 USD critical component of aftertreatment systems installed in diesel engine-powered vehicles. The device is designed to trap particles emitted by the diesel combustion process in order to prevent their release into the surrounding …
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After treatment and turbocharger effects on emissions of a diesel engine
… a turbocharger on emissions of a single cylinder diesel engine. The study measured the concentration of CO, CO2, HC, NO, NO2, and NOx. Tests on the engine were performed at different engine loads and engine speeds. The engine power ranged from 0 to 9 HP, and the engine speed ranged from 1500 to …
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The Effect Of Biodiesel Blends On A Multi-Cylinder Engine And The Impact On Aftertreatment
… and clean burning fuel, specifically biodiesel. Biodiesel, or vegetable oil ester as it was originally referred to, has been improving and progressing since the early 1900's. Fortunately, significant advancement in the understanding of raw vegetable oil as a fuel as well as converting it …
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Design and Evaluation of a Marine Scrubber System
… of nitrogen (NOX) emissions regulations for diesel marine engines are resulting in the development of newer engines with inherent NOX emissions reduction technologies. With typical useful service lives over 20 years, older diesel marine engines are producing disproportionate amounts of NOX …
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Applicability of hybrid methods in engine control system design
… to the challenges of engine management for diesel exhaust aftertreatment. Theoretical work has been supported by experiments carried out in a diesel engine test cell. A control relevant air-path model was developed using experimental work carried out on a diesel engine and dynamometer, with …
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Characterizing ash and substrate properties in sintered metal fiber diesel particulate filters using an advanced diagnostic approach
… strict air emissions regulations, applicable diesel engines are required to have an installed after-treatment device. A diesel particulate filter (DPF) is one of these aftertreatment devices, and it is used to capture hazardous particulate matter (PM) from the engine exhaust stream. Over the …
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Development and application of a channel-scale exhaust after-treatment model
… devices against literature data, including a diesel oxidation catalyst (DOC), a selective catalytic reduction (SCR) device and a diesel particulate filter (DPF). The model is then applied to study the impact of the configuration of a multi-device after-treatment system. An after-treatment …
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Ash impacts on gasoline particulate filter performance and service life
… Separate new regulations that aim to reduce particulate emissions to address air pollution concerns are taking effect concurrent with greenhouse gas limitations in both jurisdictions. GDI engines are proven to create more particulate emissions than previously utilized port-injection …
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The effect of lubricant derived ash on the catalytic activity of diesel particulate filters
A diesel particulate filter (DPF) is an aftertreatment device used to remove hazardous particulate matter (PM) from diesel engine exhaust. Modem emission restrictions have limited the acceptable amount of PM output by diesel engines to the extent that a filtration strategy, such as the use of a …
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