Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 69 for “"DPF"”.
-
Spatially resolved investigations and modelling of SCR/DPF
… techniques to investigate the behavior of SCR/DPFs. The initial stages of the experimental aspect of the project will make use of the SpaciMS mass spectrometer available in the Chemical Engineering department at QUB. One of the aims of the project is to acquire spatially resolved data within …
-
DPF--a dynamic high-performance network packet filter
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
-
Individual and synergistic effects of lubricant additive (Ca, Mg, Zn) combinations on ash characteristics and DPF performance
Diesel particulate filters (DPF) are devices that trap hazardous particulate matter from diesel engine exhaust in order to meet increasingly strict particle emissions regulations. Diesel exhaust particulates mainly include soot and ash. Soot, carbon particles derived from incomplete fuel …
-
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 …
-
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 …
-
The nature of lubricant-derived ash-related emissions and their impact on diesel aftertreatment system performance
Diesel particulate filters (DPF) have seen widespread use in on- and off-road applications as an effective means for meeting increasingly stringent particle emissions regulations. Over time, incombustible material or ash, primarily derived from metallic additives in the engine lubricant, …
-
Modification and Numerical Modelling of Dense Plasma Focus Device
A dense plasma focus device (DPF) is a pulsed power device that generates high energy particles, neutrons and X-rays through rapid compression of the plasma. The presented research investigates the modification of the DPF and use of numerical modelling to predict the neutron yield. The DPF is a 1 …
-
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 …
-
Microscopy investigations of ash and particulate matter accumulation in diesel particulate filter surface pores
… beginning in 2007. Diesel particulate filters (DPF) provide the most effective means of reducing PM emissions from diesel exhaust. DPFs can reduce over 99% of PM in the exhaust. DPF effectiveness is limited by the accumulation of ash. Ash is comprised of incombustible material from engine …
-
Organophosphorus Pesticide Exposure Effects on Neurobehavioral Development of Zebrafish and Characterization of Developmental Switch Between Two Cation-chloride Cotransporters (zfnkcc1 and zfkcc2)
… AChE when measured at 5 days post fertilization (dpf) by 80%, which correlated to a 35% decrease in larval motility when measured at 6 dpf. </p><p>We isolated the cDNA of <italic>zfkcc2</italic>, which encodes for an important cation-chloride cotransporter responsible for establishing a chloride …
-
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 …
-
Performance evaluation of diesel particulate filters on heavy-duty vehicles
Diesel particulate filters, or DPFs, are exhaust aftertreatment devices used to reduce exhaust emissions from diesel powered vehicles. Typical designs have a wall flow filter element downstream of an oxidation catalyst, which oxidizes a portion of the NO present in the exhaust stream to form NO2. …
-
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. …
-
Experimental Investigation on Different After-treatment Technologies for the Control of Pollutant Emissions from Automotive Diesel Engines.
… capability, and a Diesel Particulate Filter (DPF) were assessed. PN emissions were evaluated under normal engine operating mode, as well as under DPF regeneration mode; unimodal distribution were found at both engine outlet and DOC outlet, without any effects of DOC on the emitted particles; …
-
Development and application of a channel-scale exhaust after-treatment model
… (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 design case study for a heavy-duty diesel engine is performed. The case study showed that the DOC-DPF-SCR layout …
-
Rapid material interrogation using X rays from a dense plasma focus
Dense Plasma Focus (DPF) devices are multi-radiation sources of X rays, neutrons (when working with deuterium), ions, and electrons in pulses typically of a few tens of nanoseconds. The Kansas State University device (KSU-DPF) was commissioned to be used as a radiation source with the Mechanical …
-
Characterizing ash and substrate properties in sintered metal fiber diesel particulate filters using an advanced diagnostic approach
… 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 lifetime of the DPF, incombustible materials like ash are deposited within the DPF. The presence of ash …
-
Zebrafish Retinal Development and the Effects of Abnormal Light Rearing Conditions
… Three ages were tested: 6-8, 13-15, and 21-24 dpf. The method used to assess retinal function was the electroretinogram (ERG). Comparisons were made across the three age groups and the three conditions. Differences in the ERG waveforms and spectral sensitivities across the three ages were …
Page 1 of 4