Download or read book Sensitivity of the Detailed Characteristics of Diesel Particulate Matter Emissions Under Steady State Light load Engine Operation written by John C. Stetter and published by . This book was released on 2004 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Engine Operating Condition and Aftertreatment Component Selection on Diesel Particulate Filter Operation written by Eric L. Schroeder and published by . This book was released on 2006 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Engine Operating Conditions and Fuel Composition on the Detailed Characteristics of Diesel Exhaust written by Chol-Bum Kweon and published by . This book was released on 2002 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report to Congress Pursuant to Section 601 of the Nuclear Non proliferation Act of 1978 for the Year Ending December 31 1993 written by and published by . This book was released on 1994 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impact of Particulate Matter Composition on Catalyzed Diesel Particulate Filter Filtration and Regeneration on a Steady State Research Diesel Engine written by Matthew Bohm and published by . This book was released on 2005 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of the Engine Exhaust Particle Sizer Eeps for Real Time Measurements of Diesel and Biodiesel Exhaust Particulate Matter written by Jim Dunshee and published by . This book was released on 2016 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Even at low concentrations, the criteria air pollutant particulate matter (PM) is an environmental and public health hazard. Emissions levels legislated for modern diesel vehicles are so low (~90% lower than 2003) that it has become difficult to accurately measure PM by the regulatory metric: the mass of particles collected on a filter (i.e., the gravimetric method). Additionally, gravimetric analysis cannot measure real-time emission rates, and therefore is unable to characterize high-emitting transient events (e.g., engine starts, stop-and-go driving). By an alternate method, PM can be estimated by measuring the number-weighted particle size distribution (PSD) and calculating mass with a combination of theoretical and empirical constants (e.g., particle effective density). This integrated particle size distribution (IPSD) method is capable of high measurement sensitivity and real-time resolution. Real-time measurements by the IPSD method require fast-sizing spectrometers, such as the TSI Engine Exhaust Particle Sizer (EEPS), which sizes (between 5.6-560 nm) and counts particles based on their electrical mobility. The EEPS utilizes a unipolar charger to quickly charge particles for sizing and counting, however this mechanism has been shown to produce a less predictable charge distribution than bipolar chargers used in Scanning Mobility Particle Sizer (SMPS) systems – the gold standard “slow-sizing” spectrometer. Several evaluations have shown deficiencies in EEPS PSD measurements due to charging differences (associated with particle morphology) unaccounted for in the transfer function matrix used to calibrate the EEPS. Specifically, the unipolar charger multiply charges a higher percentage of soot agglomerates (fractal-like particles common in diesel engine exhaust) than bipolar chargers. Because inaccurate PSDs are a primary reason for reported discrepancies between IPSD calculated mass and the gravimetric method, it is important to correct this deficiency in EEPS measurements. Recently, TSI has released additional EEPS calibration matrices (“Soot” and “Compact”) which have shown better agreement with SMPS measurements under preliminary test conditions. This study further evaluates the performance of these new matrices relative to the original “Default” matrix for diesel and biodiesel exhaust particles. Steady-state (75% engine load) emissions were generated by a light-duty diesel engine operating on (1) ultra-low sulfur diesel (ULSD) and (2) 100% soybean biodiesel. Raw EEPS data processed with each matrix were compared to simultaneously collected reference measurements from an SMPS. PSDs were evaluated based on their shape – i.e., multimodal fits of geometric mean diameter (GMD) and geometric standard deviation (GSD) – and concentration at peak particle diameter. For both fuels, all measurements agreed well in terms of the shape of the PSD: primary mode (accumulation) GMD ± 10nm, GSD ± 0.3. For ULSD, EEPS Default, Soot, and Compact concentrations were higher than the SMPS by factors of 1.9, 1.3, and 2.5, respectively. For biodiesel, EEPS Default, Soot, and Compact concentrations were higher than the SMPS by factors of 2.1, 1.7, and 2.4, respectively. Based on these results, the Soot matrix produced acceptable agreement between EEPS and SMPS measurements of ULSD exhaust particles. However, based on the factor of ~2 difference observed here, an additional calibration matrix may be necessary for the EEPS to accurately measure biodiesel exhaust particles. The IPSD method for estimating PM mass was applied to available data sets with corresponding gravimetric measurements (one ULSD transient cycle test and the same biodiesel steady-state test used for PSD evaluation). Real-time PSDs from each of the three EEPS matrices were used in combination with three sets of values assumed for size-dependent particle effective density (representing a range of potential conditions), resulting in nine IPSD estimates of PM mass corresponding to each gravimetric sample (one ULSD, one biodiesel). For the transient ULSD test, a widely used effective density distribution for fractal-like soot agglomerates resulted in good agreement between IPSD estimated mass and the gravimetric measurement (within 9% and 6% for Soot and Compact matrices, respectively). For the steady-state biodiesel test, assuming unit density (1g/cm3 for all particles) resulted in good agreement between IPSD estimated mass and the gravimetric measurement (within 7% and 2% for Soot and Compact matrices, respectively). These results support previous findings that the Soot matrix is currently the best available option for measurement of ULSD exhaust particles by the EEPS and that particle effective density distributions similar to the “fractal-like” one used here are an accurate estimate for ULSD exhaust particles under many conditions. However, based on the discrepancies between the EEPS and SMPS measured biodiesel exhaust PSDs observed here, as well as a current lack of information on the effective density of biodiesel exhaust particles, it is clear that additional research is necessary in order to understand the properties of biodiesel exhaust particles, especially as they relate to electrical mobility measurements and IPSD estimation of PM mass.
Download or read book Engine Exhaust Particulates written by Avinash Kumar Agarwal and published by Springer. This book was released on 2018-11-01 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comparative analysis of both diesel and gasoline engine particulates, and also of the emissions resulting from the use of alternative fuels. Written by respected experts, it offers comprehensive insights into motor vehicle particulates, their formation, composition, location, measurement, characterisation and toxicology. It also addresses exhaust-gas treatment and legal, measurement-related and technological advancements concerning emissions. The book will serve as a valuable resource for academic researchers and professional automotive engineers alike.
Download or read book The Effects of Lubricating Oil Consumption on the Detailed Characteristics of Diesel Particulate Matter written by Nathan D. Forster and published by . This book was released on 2003 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanoparticle Emissions From Combustion Engines written by Jerzy Merkisz and published by Springer. This book was released on 2016-10-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on particulate matter emissions produced by vehicles with combustion engines. It describes the physicochemical properties of the particulate matter, the mechanisms of its formation and its environmental impacts (including those on human beings). It discusses methods for measuring particulate mass and number, including the state-of-the-art in Portable Emission Measurement System (PEMS) equipment for measuring the exhaust emissions of both light and heavy-duty vehicles and buses under actual operating conditions. The book presents the authors’ latest investigations into the relations between particulate emission (mass and number) and engine operating parameters, as well as their new findings obtained through road tests performed on various types of vehicles, including those using diesel particulate filter regeneration. The book, which addresses the needs of academics and professionals alike, also discusses relevant European regulations on particulate emissions and highlights selected methods aimed at the reduction of particulate emissions from automobiles.
Download or read book The Effects of Filtration Velocities and Particulate Matter Characteristics on Diesel Particulate Filter Wall Loading Performance written by Ekathai Wirojsakunchai and published by . This book was released on 2008 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1985 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characteristics of Particle Number and Particle Mass Emissions of a Diesel Engine During Cold Warm and Hot start Operation written by Faisal Lodi and published by . This book was released on 2021 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diesel engine cold start is emerging as a critical topic of investigation. Of key importance is the impact the warm-up period has on particulate emissions. Presented in this work is a fundamental and comprehensive study on the impact of cold, warm, and hot start on particulate emissions over a custom quasi-steady-state drive cycle discretized by frequent engine stop/start. The experiments were conducted on a six-cylinder, turbocharged, diesel engine. Compared with cold start, the count median diameter (CMD) increased by 16% and 5% in the Aitken mode at 1500 rpm and 2000 rpm, respectively, when the engine was fully warmed up. The geometric standard deviation (GSD) decreased as the engine warmed up. Particle number (PN) concentration decreased by 50% as the engine coolant temperature reached 70°C, compared to cold start (23°C), and a strong positive linear correlation was found between the particle mass (PM) and PN emissions at all loads. This work explores the topic of engine warm-up with respect to particulate emissions with a rigor not previously done. -- SAE website.
Download or read book Micro scale Investigation of Filtration Velocity and Particulate Matter Characteristics Effects on Diesel Particulate Filter Wall Loading written by Renato A. Yapaulo and published by . This book was released on 2009 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Characteristics of Particulate Emissions from Advanced Diesel Combustion written by Christopher P. Kolodziej and published by . This book was released on 2007 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An initial assessment of the literature on the measurement control transport transformation and health effects of urregulated diesel engine emissions written by United States. National Highway Traffic Safety Administration and published by . This book was released on 1979 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Size Distribution and Mass Output of Particulates from Diesel Engine Exhausts written by John A. Breslin and published by . This book was released on 1976 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acid Precipitation written by and published by . This book was released on 1986 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
