Download or read book Investigation of Deposits and Flashing Effect on Spray Characteristics in Gasoline Direct Injection Engines written by Bo Wang and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Spray Characteristics for Flashing Injection of Fuels Containing Dissolved Air and Superheated Fuels written by A. S. P. Solomon and published by . This book was released on 1982 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Spray for Characteristics for Flashing Injection of Fuels Containing Dissolved Air and Superheated Fuels written by A. S. P. Solomon and published by . This book was released on 1982 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Automotive Spark Ignited Direct Injection Gasoline Engines written by F. Zhao and published by Elsevier. This book was released on 2000-02-08 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: The process of fuel injection, spray atomization and vaporization, charge cooling, mixture preparation and the control of in-cylinder air motion are all being actively researched and this work is reviewed in detail and analyzed. The new technologies such as high-pressure, common-rail, gasoline injection systems and swirl-atomizing gasoline fuel injections are discussed in detail, as these technologies, along with computer control capabilities, have enabled the current new examination of an old objective; the direct-injection, stratified-charge (DISC), gasoline engine. The prior work on DISC engines that is relevant to current GDI engine development is also reviewed and discussed. The fuel economy and emission data for actual engine configurations have been obtained and assembled for all of the available GDI literature, and are reviewed and discussed in detail. The types of GDI engines are arranged in four classifications of decreasing complexity, and the advantages and disadvantages of each class are noted and explained. Emphasis is placed upon consensus trends and conclusions that are evident when taken as a whole; thus the GDI researcher is informed regarding the degree to which engine volumetric efficiency and compression ratio can be increased under optimized conditions, and as to the extent to which unburned hydrocarbon (UBHC), NOx and particulate emissions can be minimized for specific combustion strategies. The critical area of GDI fuel injector deposits and the associated effect on spray geometry and engine performance degradation are reviewed, and important system guidelines for minimizing deposition rates and deposit effects are presented. The capabilities and limitations of emission control techniques and after treatment hardware are reviewed in depth, and a compilation and discussion of areas of consensus on attaining European, Japanese and North American emission standards presented. All known research, prototype and production GDI engines worldwide are reviewed as to performance, emissions and fuel economy advantages, and for areas requiring further development. The engine schematics, control diagrams and specifications are compiled, and the emission control strategies are illustrated and discussed. The influence of lean-NOx catalysts on the development of late-injection, stratified-charge GDI engines is reviewed, and the relative merits of lean-burn, homogeneous, direct-injection engines as an option requiring less control complexity are analyzed.

Download or read book Effects of Flash Boiling Fuel Injection on Spray Characteristics Combustion and Engine Performance in Direct Injection and Indirect Injection Diesel Engines written by Nobuyuki Yamazaki and published by . This book was released on 1985 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical and Experimental Study of Spray Characteristics in the Gasoline Direct Injection Engine written by Powen Tu and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CHARACTERIZATION OF THE POST INJECTION BEHAVIOR OF GASOLINE DIRECT INJECTION FUEL INJECTORS written by and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : The characteristics of gasoline sprayed directly into combustion chambers are of critical importance to engine out emissions and combustion system development. The optimization of the spray characteristics to match the in-cylinder flow field, chamber geometry, and spark location are vital tasks during the development of an engine combustion strategy. Furthermore, the presence of liquid fuel during combustion in Spark-Ignition (SI) engines causes increased hydrocarbon (HC) emissions [1]. Euro 6, LEVIII, and US Tier 3 emissions regulations reduce the allowable particulate mass significantly from the previous standards. LEVIII standards reduce the acceptable particulate emission to 1 mg/mile [2]. A good Direct Injection Spark Ignited (DISI) strategy vaporizes the correct amount of fuel at the proper point in the engine cycle with the proper in-cylinder air flow for optimal power output with minimal emissions. The opening and closing phases of DISI injectors is crucial to this task as the spray produces larger droplets during both theses phases. This work focuses on the results from a novel method to investigate fuel behavior upon closing of the fuel injector. A Design of Experiments (DOE) was used to determine the effect of pressure, temperature, and pulse-width of the fuel spray after the closing event. Experiments determined that the primary source of controlling the droplet size and the mass post injector closing for a given injector was the temperature. It was found that the end of injection behavior is a highly dynamic, complex event including, but not limited to, effects from the injector design, deposit concentration, and fuel type.

Download or read book The Effects of Spray Characteristics on Combustion and Emission Performance of a Two stroke Direct injection Engine written by Mark Casarella and published by . This book was released on 1998 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Automotive Gasoline Direct Injection Engines written by Fuquan Zhao and published by SAE International. This book was released on 2002-05-15 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the latest global technical initiatives in the rapidly progressing area of gasoline direct injection (GDI), spark-ignited gasoline engines and examines the contribution of each process and sub-system to the efficiency of the overall system. Including discussions, data, and figures from many technical papers and proceedings that are not available in the English language, Automotive Gasoline Direct Injection Systems will prove to be an invaluable desk reference for any GDI subject or direct-injection subsystem that is being developed worldwide.

Download or read book Investigation of Microflow Machining Effects on Diesel Injector Spray Characteristics written by Ana Cristina Holguin and published by . This book was released on 2003 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Investigation of Effects of Fuel Injection Parameters and Chamber Wall Confinement on Spray Characteristics in Constant Volume Bomb written by S-x Shi and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Optical Investigation of the Cold Starting Characteristics of Alternate Fuel Sprays in a Spark assisted Direct Injection Diesel Engine Using High speed Photography written by Steven G. Fritz and published by . This book was released on 1986 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computational Exploration of Flash boiling Internal Flow and Near nozzle Spray written by Sampath K. Rachakonda and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Gasoline engines operating under the principle of direct injection are susceptible to flash-boiling due to superheated nature of the fuel and the sub-atmospheric in-cylinder pressures during injection. A review of the literature on flash-boiling sprays shows that a majority of the studies have focused on the far-field regions of the spray, with limited attention given to understanding the influences of the injector geometry and the near-nozzle regions of the spray. Modeling the internal nozzle flow and the primary atomization, on which the far-field spray depends, is a challenge. This thesis, therefore, is aimed at understanding the complex flow through a fuel injector nozzle and the nature of the spray in the near-nozzle region, with the help of computer simulations under flash-boiling and non-flash-boiling conditions. In the current study, the simulations were performed using an in-house Eulerian CFD solver called HRMFoam. Improvements to the solver's near-nozzle spray modeling capability are discussed. These improvements include the implementation of a liquid-gas interface-area-density transport equation to model the primary atomization process. The simulations of direct injection of gasoline and gasoline-like sprays were performed on single-hole and multi-hole injectors, for a wide range of operating conditions. Spray characteristics such as the nozzle's coefficient of discharge and the mean droplet diameter in the dense region of the spray were seen to be captured adequately well with the help of a 2D axi-symmetry assumption in the case of single-hole injectors. A novel approach to identify the near-nozzle spray plume boundary in CFD simulations is presented and validated against experimental measurements for a single-hole asymmetric injector. Case studies on single-hole asymmetric injectors revealed a direct correlation between the drill angle of the nozzle and near-nozzle spray plume angle. A hypothesis of the similarity between a stepped-hole two-phase nozzle and a conventional single-phase converging-diverging nozzle is presented. Furthermore, it was observed that flash-boiling jets behave as underexpanded jets, and therefore, are wider. Whereas, non-flash-boiling behave as overexpanded jets, and thus are narrower. Through the case studies on multi-hole injectors, the collapse of the spray or lack thereof was qualitatively and quantitatively characterized. In this process, a resemblance between the experimentally and computationally identified spray collapse mechanism was established. The application of LES modeling to internal and near-nozzle GDI sprays was explored in a pilot study, and the results were qualitatively validated against the experimentally available near-nozzle X-ray radiography measurements. Finally, in another pilot study, an attempt to model the interphase slip velocity is discussed.

Download or read book Alternative Fuels and Advanced Vehicle Technologies for Improved Environmental Performance written by Richard Folkson and published by Woodhead Publishing. This book was released on 2022-07-27 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alternative Fuels and Advanced Vehicle Technologies for Improved Environmental Performance: Towards Zero Carbon Transportation, Second Edition provides a comprehensive view of key developments in advanced fuels and vehicle technologies to improve the energy efficiency and environmental impact of the automotive sector. Sections consider the role of alternative fuels such as electricity, alcohol and hydrogen fuel cells, as well as advanced additives and oils in environmentally sustainable transport. Other topics explored include methods of revising engine and vehicle design to improve environmental performance and fuel economy and developments in electric and hybrid vehicle technologies. This reference will provide professionals, engineers and researchers of alternative fuels with an understanding of the latest clean technologies which will help them to advance the field. Those working in environmental and mechanical engineering will benefit from the detailed analysis of the technologies covered, as will fuel suppliers and energy producers seeking to improve the efficiency, sustainability and accessibility of their work. Provides a fully updated reference with significant technological advances and developments in the sector Presents analyses on the latest advances in electronic systems for emissions control, autonomous systems, artificial intelligence and legislative requirements Includes a strong focus on updated climate change predictions and consequences, helping the reader work towards ambitious 2050 climate change goals for the automotive industry

Download or read book Effect of Spray Characteristics on Combustion in a Direct Injection Spark Ignition Engine written by T. Shiraishi and published by . This book was released on 1998 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Investigation of Spray and Combustion of Gasoline Direct Injection Under Different Ambient Conditions written by Libing Wang and published by . This book was released on 2019 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Index abstracts of SAE Technical Papers written by and published by . This book was released on 2005 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt: