Feasibility and Limitations of Premixed Diesel Combustion in Multi-cylinder Engines PDF Download
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Author: Guntram Arnulf Lechner
Publisher:
ISBN:
Category :
Languages : en
Pages : 378
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Book Description
Author: Guntram Arnulf Lechner
Publisher:
ISBN:
Category :
Languages : en
Pages : 378
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Book Description
Author: Magnus Lewander
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 778
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Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 776
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Book Description
Author: Gautam Kalghatgi
Publisher: Springer Nature
ISBN: 9811687358
Category : Technology & Engineering
Languages : en
Pages : 339
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Book Description
This book focuses on gasoline compression ignition (GCI) which offers the prospect of engines with high efficiency and low exhaust emissions at a lower cost. A GCI engine is a compression ignition (CI) engine which is run on gasoline-like fuels (even on low-octane gasoline), making it significantly easier to control particulates and NOx but with high efficiency. The state of the art development to make GCI combustion feasible on practical vehicles is highlighted, e.g., on overcoming problems on cold start, high-pressure rise rates at high loads, transients, and HC and CO emissions. This book will be a useful guide to those in academia and industry.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Gasoline compression ignition concepts with the majority of the fuel being introduced early in the cycle are known as partially premixed combustion (PPC). Previous research on single- and multi-cylinder engines has shown that PPC has the potential for high thermal efficiency with low NOx and soot emissions. A variety of fuel injection strategies has been proposed in the literature. These injection strategies aim to create a partially stratified charge to simultaneously reduce NOx and soot emissions while maintaining some level of control over the combustion process through the fuel delivery system. The impact of the direct injection strategy to create a premixed charge of fuel and air has not previously been explored, and its impact on engine efficiency and emissions is not well understood. This paper explores the effect of sweeping the direct injected pilot timing from -91° to -324° ATDC, which is just after the exhaust valve closes for the engine used in this study. During the sweep, the pilot injection consistently contained 65% of the total fuel (based on command duration ratio), and the main injection timing was adjusted slightly to maintain combustion phasing near top dead center. A modern four cylinder, 1.9 L diesel engine with a variable geometry turbocharger, high pressure common rail injection system, wide included angle injectors, and variable swirl actuation was used in this study. The pistons were modified to an open bowl configuration suitable for highly premixed combustion modes. The stock diesel injection system was unmodified, and the gasoline fuel was doped with a lubricity additive to protect the high pressure fuel pump and the injectors. The study was conducted at a fixed speed/load condition of 2000 rpm and 4.0 bar brake mean effective pressure (BMEP). The pilot injection timing sweep was conducted at different intake manifold pressures, swirl levels, and fuel injection GTP-15-1067, Dempsey 2 pressures. The gasoline used in this study has relatively high fuel reactivity with a research octane number of 68. The results of this experimental campaign indicate that the highest brake thermal efficiency and lowest emissions are achieved simultaneously with the earliest pilot injection timings (i.e., during the intake stroke).
Author: Zhiyu Han
Publisher: SAE International
ISBN: 1468604007
Category : Technology & Engineering
Languages : en
Pages : 372
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Book Description
Simulation and Optimization of Internal Combustion Engines provides the fundamentals and up-to-date progress in multidimensional simulation and optimization of internal combustion engines. While it is impossible to include all the models in a single book, this book intends to introduce the pioneer and/or the often-used models and the physics behind them providing readers with ready-to-use knowledge. Key issues, useful modeling methodology and techniques, as well as instructive results, are discussed through examples. Readers will understand the fundamentals of these examples and be inspired to explore new ideas and means for better solutions in their studies and work. Topics include combustion basis of IC engines, mathematical descriptions of reactive flow with sprays, engine in-cylinder turbulence, fuel sprays, combustions and pollutant emissions, optimization of direct-injection gasoline engines, and optimization of diesel and alternative fuel engines.
Author: Adam James Weall
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Satbir Singh
Publisher:
ISBN:
Category :
Languages : en
Pages : 384
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Book Description
Author: Avinash Kumar Agarwal
Publisher: Springer Nature
ISBN: 9811683441
Category : Technology & Engineering
Languages : en
Pages : 424
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Book Description
This book highlights ways of using gaseous and liquid e-fuels like hydrogen (H2), methane (CH4), methanol (CH3OH), DME (CH3-O-CH3), Ammonia (NH3), synthetic petrol and diesel, etc in existing engines and their effects on tailpipe emissions. The contents also cover calibration and optimization procedure for adaptation of these fuels. the volume also discusses the economical aspect of these fuels. Chapters include recent results and are focused on current trends of automotive sector. This book will be of interest to those in academia and industry involved in fuels, IC engines, engine instrumentation, and environmental research.
