Controlling And Operating Homogeneous Charge Compression Ignition Hcci Engines
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Homogeneous Charge Compression Ignition Hcci
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Author :
language : en
Publisher:
Release Date : 2004
Homogeneous Charge Compression Ignition Hcci written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Internal combustion engines categories.
Controlling And Operating Homogeneous Charge Compression Ignition Hcci Engines
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Author :
language : en
Publisher:
Release Date : 2005
Controlling And Operating Homogeneous Charge Compression Ignition Hcci Engines written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
A Homogeneous Charge Compression Ignition (HCCI) engine system includes an engine that produces exhaust gas. A vaporization means vaporizes fuel for the engine an air induction means provides air for the engine. An exhaust gas recirculation means recirculates the exhaust gas. A blending means blends the vaporized fuel, the exhaust gas, and the air. An induction means inducts the blended vaporized fuel, exhaust gas, and air into the engine. A control means controls the blending of the vaporized fuel, the exhaust gas, and the air and for controls the inducting the blended vaporized fuel, exhaust gas, and air into the engine.
Control Of A Multicylinder Homogeneous Charge Compression Ignition Engine
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Author : William Lee Gans
language : en
Publisher:
Release Date : 2003
Control Of A Multicylinder Homogeneous Charge Compression Ignition Engine written by William Lee Gans and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Control And Robustness Analysis Of Homogeneous Charge Compression Ignition Using Exhaust Recompression
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Author : Hsien-Hsin Liao
language : en
Publisher: Stanford University
Release Date : 2011
Control And Robustness Analysis Of Homogeneous Charge Compression Ignition Using Exhaust Recompression written by Hsien-Hsin Liao and has been published by Stanford University this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
There has been an enormous global research effort to alleviate the current and projected environmental consequences incurred by internal combustion (IC) engines, the dominant propulsion systems in ground vehicles. Two technologies have the potential to improve the efficiency and emissions of IC engines in the near future: variable valve actuation (VVA) and homogeneous charge compression ignition (HCCI). IC engines equipped with VVA systems are proven to show better performance by adjusting the valve lift and timing appropriately. An electro-hydraulic valve system (EHVS) is a type of VVA system that possesses full flexibility, i.e., the ability to change the valve lift and timing independently and continuously, making it an ideal rapid prototyping tool in a research environment. Unfortunately, an EHVS typically shows a significant response time delay that limits the achievable closed-loop bandwidth and, as a result, shows poor tracking performance. In this thesis, a control framework that includes system identification, feedback control design, and repetitive control design is presented. The combined control law shows excellent performance with a root-mean-square tracking error below 40 [Mu]m over a maximum valve lift of 4 mm. A stability analysis is also provided to show that the mean tracking error converges to zero asymptotically with the combined control law. HCCI, the other technology presented in this thesis, is a combustion strategy initiated by compressing a homogeneous air-fuel mixture to auto-ignition, therefore, ignition occurs at multiple points inside the cylinder without noticeable flame propagation. The result is rapid combustion with low peak in-cylinder temperature, which gives HCCI improved efficiency and reduces NOx formation. To initiate HCCI with a typical compression ratio, the sensible energy of the mixture needs to be high compared to a spark ignited (SI) strategy. One approach to achieve this, called recompression HCCI, is by closing the exhaust valve early to trap a portion of the exhaust gas in the cylinder. Unlike a SI or Diesel strategy, HCCI lacks an explicit combustion trigger, as autoignition is governed by chemical kinetics. Therefore, the thermo-chemical conditions of the air-fuel mixture need to be carefully controlled for HCCI to occur at the desired timing. Compounding this challenge in recompression HCCI is the re-utilization of the exhaust gas which creates cycle-to-cycle coupling. Furthermore, the coupling characteristics can change drastically around different operating points, making combustion timing control difficult across a wide range of conditions. In this thesis, a graphical analysis examines the in-cylinder temperature dynamics of recompression HCCI and reveals three qualitative types of temperature dynamics. With this insight, a switching linear model is formulated by combining three linear models: one for each of the three types of temperature dynamics. A switching controller that is composed of three local linear feedback controllers can then be designed based on the switching model. This switching model/control formulation is tested on an experimental HCCI testbed and shows good performance in controlling the combustion timing across a wide range. A semi-definite program is formulated to find a Lyapunov function for the switching model/control framework and shows that it is stable. As HCCI is dictated by the in-cylinder thermo-chemical conditions, there are further concerns about the robustness of HCCI, i.e., the boundedness of the thermo-chemical conditions with uncertainty existing in the ambient conditions and in the engine's own characteristics due to aging. To assess HCCI's robustness, this thesis presents a linear parameter varying (LPV) model that captures the dynamics of recompression HCCI and possesses an elegant model structure that is more amenable to analysis. Based on this model, a recursive algorithm using convex optimization is formulated to generate analytical statements about the boundedness of the in-cylinder thermo-chemical conditions. The bounds generated by the algorithm are also shown to relate well to the data from the experimental testbed.
Engine Modeling And Control
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Author : Rolf Isermann
language : en
Publisher: Springer
Release Date : 2014-07-01
Engine Modeling And Control written by Rolf Isermann and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-01 with Technology & Engineering categories.
The increasing demands for internal combustion engines with regard to fuel consumption, emissions and driveability lead to more actuators, sensors and complex control functions. A systematic implementation of the electronic control systems requires mathematical models from basic design through simulation to calibration. The book treats physically-based as well as models based experimentally on test benches for gasoline (spark ignition) and diesel (compression ignition) engines and uses them for the design of the different control functions. The main topics are: - Development steps for engine control - Stationary and dynamic experimental modeling - Physical models of intake, combustion, mechanical system, turbocharger, exhaust, cooling, lubrication, drive train - Engine control structures, hardware, software, actuators, sensors, fuel supply, injection system, camshaft - Engine control methods, static and dynamic feedforward and feedback control, calibration and optimization, HiL, RCP, control software development - Control of gasoline engines, control of air/fuel, ignition, knock, idle, coolant, adaptive control functions - Control of diesel engines, combustion models, air flow and exhaust recirculation control, combustion-pressure-based control (HCCI), optimization of feedforward and feedback control, smoke limitation and emission control This book is an introduction to electronic engine management with many practical examples, measurements and research results. It is aimed at advanced students of electrical, mechanical, mechatronic and control engineering and at practicing engineers in the field of combustion engine and automotive engineering.
Characteristics And Control Of Low Temperature Combustion Engines
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Author : Rakesh Kumar Maurya
language : en
Publisher: Springer
Release Date : 2017-11-03
Characteristics And Control Of Low Temperature Combustion Engines written by Rakesh Kumar Maurya and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-03 with Technology & Engineering categories.
This book deals with novel advanced engine combustion technologies having potential of high fuel conversion efficiency along with ultralow NOx and particulate matter (PM) emissions. It offers insight into advanced combustion modes for efficient utilization of gasoline like fuels. Fundamentals of various advanced low temperature combustion (LTC) systems such as HCCI, PCCI, PPC and RCCI engines and their fuel quality requirements are also discussed. Detailed performance, combustion and emissions characteristics of futuristic engine technologies such as PPC and RCCI employing conventional as well as alternative fuels are analyzed and discussed. Special emphasis is placed on soot particle number emission characterization, high load limiting constraints, and fuel effects on combustion characteristics in LTC engines. For closed loop combustion control of LTC engines, sensors, actuators and control strategies are also discussed. The book should prove useful to a broad audience, including graduate students, researchers, and professionals Offers novel technologies for improved and efficient utilization of gasoline like fuels; Deals with most advanced and futuristic engine combustion modes such as PPC and RCCI; Comprehensible presentation of the performance, combustion and emissions characteristics of low temperature combustion (LTC) engines; Deals with closed loop combustion control of advanced LTC engines; State-of-the-art technology book that concisely summarizes the recent advancements in LTC technology. .
Design And Control Of Automotive Propulsion Systems
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Author : Zongxuan Sun
language : en
Publisher: CRC Press
Release Date : 2014-12-20
Design And Control Of Automotive Propulsion Systems written by Zongxuan Sun and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-12-20 with Science categories.
Better Understand the Relationship between Powertrain System Design and Its Control IntegrationWhile powertrain system design and its control integration are traditionally divided into two different functional groups, a growing trend introduces the integration of more electronics (sensors, actuators, and controls) into the powertrain system.
Combustion In Homogeneous Charge Compression Ignition Engines
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Author : Daniel Lee Flowers
language : en
Publisher:
Release Date : 2001
Combustion In Homogeneous Charge Compression Ignition Engines written by Daniel Lee Flowers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Flow And Combustion In Reciprocating Engines
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Author : C. Arcoumanis
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-06-29
Flow And Combustion In Reciprocating Engines written by C. Arcoumanis and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-06-29 with Science categories.
Optimization of combustion processes in automotive engines is a key factor in reducing fuel consumption in conventional and advanced gasoline and diesel engines. This volume investigates and describes flow and combustion processes in diesel and gasoline engines. It consists of eight chapters written by world experts from industry, government laboratories and academia. Each of the chapters is self-contained and, therefore, independent from the other in that it covers its central theme in depth, although prior knowledge of the fundamentals remains a prerequisite. The book bridges a serious gap between conventional textbooks and the significant technological breakthroughs presented in worldwide conferences during the last ten years on direct-injection gasoline engines, advanced diesels and homogeneous-charge compression-ignition engines. As such, it is an essential reference text for engineers involved in research and development in global automotive and consultancy companies, research engineers involved in fundamental and applied research on various aspects of the flow, mixture preparation and combustion in reciprocating engines. The authors are eminent researchers from universities and industry.
Automotive Model Predictive Control
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Author : Luigi Del Re
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-03-11
Automotive Model Predictive Control written by Luigi Del Re and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-03-11 with Technology & Engineering categories.
Automotive control has developed over the decades from an auxiliary te- nology to a key element without which the actual performances, emission, safety and consumption targets could not be met. Accordingly, automotive control has been increasing its authority and responsibility – at the price of complexity and di?cult tuning. The progressive evolution has been mainly ledby speci?capplicationsandshorttermtargets,withthe consequencethat automotive control is to a very large extent more heuristic than systematic. Product requirements are still increasing and new challenges are coming from potentially huge markets like India and China, and against this ba- ground there is wide consensus both in the industry and academia that the current state is not satisfactory. Model-based control could be an approach to improve performance while reducing development and tuning times and possibly costs. Model predictive control is a kind of model-based control design approach which has experienced a growing success since the middle of the 1980s for “slow” complex plants, in particular of the chemical and process industry. In the last decades, severaldevelopments haveallowedusing these methods also for “fast”systemsandthis hassupporteda growinginterestinitsusealsofor automotive applications, with several promising results reported. Still there is no consensus on whether model predictive control with its high requi- ments on model quality and on computational power is a sensible choice for automotive control.