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Author: Markus Bertsch Publisher: Logos Verlag Berlin GmbH ISBN: 3832544038 Category : Technology & Engineering Languages : en Pages : 170
Book Description
This thesis discusses experimental investigations to reduce particle number emissions from gasoline engines with direct injection. Measures on a single cylinder research engine with combined usage of a particle number measurement system, a particle size distribution measurement system as well as optical diagnostics and thermodynamic analysis enable an in-depth assessment of particle formation and oxidation. Therefore, numerous optical diagnostic techniques for spray visualisation (Mie-scattering, High-Speed PIV) and soot detection (High-Speed-Imaging, Fiber optical diagnostics) are deployed. Two injectors with different hydraulic flows but identical spray-targeting are characterised and compared by measurements in a pressurised chamber. The operation at higher engine load and low engine speed is in the focus of the experimental work at the engine test bench. Thereby, the low flow velocities in the combustion chamber, caused by the low engine speed, as well as the large amount of fuel injected are major challenges for the mixture formation process. A substantial part of the thesis thus focusses on the detailed analysis of the mixture formation process, which is consisting of fuel injection, interaction of the in-cylinder charge motion with the fuel injected and the fuel properties. Measures for the optimisation of the mixture formation process and the minimisation of the particle number emissions are analysed and evaluated. The charge motion is manipulated by the impression of a directed flow, the variation of the valve timings and valve open curve. The injection process is influenced by a reduction of the hydraulic flow of the injector and an increase of the injection pressure up to 50 MPa. The investigations show fundamental effects and potentials of different variation parameters concerning their emissions reduction potential at the exemplary operation at high engine load. Due to the simultaneous analysis of the in-cylinder charge motion and a thermodynamic analysis, the results can be transferred to different engines.
Author: Markus Bertsch Publisher: Logos Verlag Berlin GmbH ISBN: 3832544038 Category : Technology & Engineering Languages : en Pages : 170
Book Description
This thesis discusses experimental investigations to reduce particle number emissions from gasoline engines with direct injection. Measures on a single cylinder research engine with combined usage of a particle number measurement system, a particle size distribution measurement system as well as optical diagnostics and thermodynamic analysis enable an in-depth assessment of particle formation and oxidation. Therefore, numerous optical diagnostic techniques for spray visualisation (Mie-scattering, High-Speed PIV) and soot detection (High-Speed-Imaging, Fiber optical diagnostics) are deployed. Two injectors with different hydraulic flows but identical spray-targeting are characterised and compared by measurements in a pressurised chamber. The operation at higher engine load and low engine speed is in the focus of the experimental work at the engine test bench. Thereby, the low flow velocities in the combustion chamber, caused by the low engine speed, as well as the large amount of fuel injected are major challenges for the mixture formation process. A substantial part of the thesis thus focusses on the detailed analysis of the mixture formation process, which is consisting of fuel injection, interaction of the in-cylinder charge motion with the fuel injected and the fuel properties. Measures for the optimisation of the mixture formation process and the minimisation of the particle number emissions are analysed and evaluated. The charge motion is manipulated by the impression of a directed flow, the variation of the valve timings and valve open curve. The injection process is influenced by a reduction of the hydraulic flow of the injector and an increase of the injection pressure up to 50 MPa. The investigations show fundamental effects and potentials of different variation parameters concerning their emissions reduction potential at the exemplary operation at high engine load. Due to the simultaneous analysis of the in-cylinder charge motion and a thermodynamic analysis, the results can be transferred to different engines.
Author: Publisher: Psychology Press ISBN: 0415335868 Category : Foreign Language Study Languages : en Pages : 962
Book Description
Since its publication in 1995, the German Technical Dictionary has established itself as the definitive resource for anyone who needs to translate technical documents between German and English. This new edition has been substantially revised to reflect the technological environment of the twenty-first century. The revised edition contains over 75,000 entries, of which over 5,000 are new, with many new entries in the areas of: * the Internet and telecommunications * bio-technology and the new genetics * new developments in health technology. Throughout, this dictionary continues to benefit from the features that made the first edition so valuable, including accurate translations in British and American English and an attractive, durable and easy to use layout.
Author: Markus Raffel Publisher: Springer Science & Business Media ISBN: 3540723072 Category : Technology & Engineering Languages : en Pages : 460
Book Description
This immensely practical guide to PIV provides a condensed, yet exhaustive guide to most of the information needed for experiments employing the technique. This second edition has updated chapters on the principles and extra information on microscopic, high-speed and three component measurements as well as a description of advanced evaluation techniques. What’s more, the huge increase in the range of possible applications has been taken into account as the chapter describing these applications of the PIV technique has been expanded.
Author: Anton Pischinger Publisher: Springer-Verlag ISBN: 3709199719 Category : Technology & Engineering Languages : de Pages : 135
Book Description
Dieser Buchtitel ist Teil des Digitalisierungsprojekts Springer Book Archives mit Publikationen, die seit den Anfängen des Verlags von 1842 erschienen sind. Der Verlag stellt mit diesem Archiv Quellen für die historische wie auch die disziplingeschichtliche Forschung zur Verfügung, die jeweils im historischen Kontext betrachtet werden müssen. Dieser Titel erschien in der Zeit vor 1945 und wird daher in seiner zeittypischen politisch-ideologischen Ausrichtung vom Verlag nicht beworben.
Author: Routledge Publisher: Routledge ISBN: 1134307969 Category : Foreign Language Study Languages : en Pages : 4684
Book Description
Since its publication in 1995, the German Technical Dictionary has established itself as the definitive resource for anyone who needs to translate technical documents between German and English. This new edition has been substantially revised to reflect the technological environment of the 21st century. The revised edition contains over 75,000 entries, of which over 5,000 are new, with many new entries in the areas of: * the internet and telecommunications * bio-technology and the new genetics * new developments in health technology Throughout this dictionary continues to benefit from the features that made the first edition so valuable, including accurate translations in British and American English and an attractive, durable and easy to use layout.
Author: Richard van Basshuysen Publisher: Vieweg+Teubner Verlag ISBN: 9783834826886 Category : Technology & Engineering Languages : en Pages : 0
Book Description
Direct injection spark-ignition engines are becoming increasingly important, and their potential is still to be fully exploited. Increased power and torque coupled with further reductions in fuel consumption and emissions will be the clear trend for future developments. From today’s perspective, the key technologies driving this development will be new fuel injection and combustion processes. The book presents the latest developments, illustrates and evaluates engine concepts such as downsizing and describes the requirements that have to be met by materials and operating fluids. The outlook at the end of the book discusses whether future spark-ignition engines will achieve the same level as diesel engines.
Author: Russ Miles Publisher: "O'Reilly Media, Inc." ISBN: 0596009828 Category : Computers Languages : en Pages : 286
Book Description
With its clear introduction to the Unified Modeling Language (UML) 2.0, this tutorial offers a solid understanding of each topic, covering foundational concepts of object-orientation and an introduction to each of the UML diagram types.
Author: Hua Zhao Publisher: CRC Press ISBN: Category : Technology & Engineering Languages : en Pages : 562
Book Description
Homogeneous charge compression ignition (HCCI)/controlled auto-ignition (CAI) has emerged as one of the most promising engine technologies with the potential to combine fuel efficiency and improved emissions performance, offering reduced nitrous oxides and particulate matter alongside efficiency comparable with modern diesel engines. Despite the considerable advantages, its operational range is rather limited and controlling the combustion (timing of ignition and rate of energy release) is still an area of on-going research. Commercial applications are, however, close to reality. HCCI a.
Author: Markus Bertsch
Author: Markus Bertsch
Author: 
Author: Markus Raffel
Author: Anton Pischinger
Author: Stefan Pischinger
Author: Routledge
Author: Arthur Zajonc
Author: Richard van Basshuysen
Author: Russ Miles
Author: Hua Zhao