Modeling and Control of Exhaust Recompression HCCI Using Variable Valve Actuation and Fuel Injection

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (665 download)

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Book Synopsis Modeling and Control of Exhaust Recompression HCCI Using Variable Valve Actuation and Fuel Injection by : Nikhil Ravi

Download or read book Modeling and Control of Exhaust Recompression HCCI Using Variable Valve Actuation and Fuel Injection written by Nikhil Ravi and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With the growing focus on energy and environmental issues in the world today, significant efforts are being made in the automotive industry towards the development of sustainable and clean technologies that can power automobiles. One of the most promising engine technologies along these lines is homogeneous charge compression ignition (HCCI). By using variable valve actuation (VVA) to trap a portion of the exhaust gases and using this to increase the sensible energy of the reactant mixture on the next engine cycle, HCCI allows fast compression ignition of a homogeneous and diluted fuel-air mixture, leading to significantly better efficiency and emissions characteristics in comparison to current technologies. However, due to the lack of a direct combustion trigger, as well as the presence of cycle-to-cycle dynamics where the trapped exhaust from one engine cycle influences combustion on the next, closed-loop control is necessary for the operation of HCCI over a wide operating range. This thesis presents a physical model-based control framework for controlling an HCCI engine with exhaust recompression and direct injection of fuel into the cylinder. A physical model is used to describe the HCCI process, with the model states being closely linked to the thermodynamic state of the cylinder constituents. Simple linear controllers based on this model are used to control the work output and the phasing of combustion on a cycle-by-cycle basis with the use of variable valve timings as well as variable fuel injection quantity. Experimental results from both single and multi-cylinder engine testbeds are presented, demonstrating the value of a physical model-based approach that allows an easy porting of the control structure from one engine to another. The controllers are also seen to be useful in reducing the cyclic variability of combustion at operating points with late combustion phasing, indicating the value of this framework in potentially expanding the operating range of HCCI. Having validated the basic model structure with simple controllers, this thesis then describes the expansion of the modeling framework to include a simple model for the effects of fuel injection during recompression. This represents the first such model of its kind, and it forms the basis for control strategies that use a split fuel injection, with a variable pilot injection timing, to control the phasing of combustion. These include a mid-ranging control scheme where constraints on a realistic implementation of valve actuation such as cam phasers are taken into account. Finally a more comprehensive control framework is developed based on the principle of model predictive control (MPC). The predictive controller is designed for fast tracking of desired load and phasing trajectories while respecting practical constraints on the different actuators as well as other system variables such as air-fuel ratio. Experimental implementation of the MPC scheme demonstrates the promise of this model-based control framework as a practical tool for HCCI control.

Control and Robustness Analysis of Homogeneous Charge Compression Ignition Using Exhaust Recompression

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Author :
Publisher : Stanford University
ISBN 13 :
Total Pages : 201 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Control and Robustness Analysis of Homogeneous Charge Compression Ignition Using Exhaust Recompression by : Hsien-Hsin Liao

Download or read book Control and Robustness Analysis of Homogeneous Charge Compression Ignition Using Exhaust Recompression written by Hsien-Hsin Liao and published by Stanford University. This book was released on 2011 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Modeling and Control of Single Cylinder HCCI Engine

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Author :
Publisher :
ISBN 13 :
Total Pages : 218 pages
Book Rating : 4.:/5 (841 download)

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Book Synopsis Modeling and Control of Single Cylinder HCCI Engine by : Varun Tandra

Download or read book Modeling and Control of Single Cylinder HCCI Engine written by Varun Tandra and published by . This book was released on 2009 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: With growing environmental concern, energy consumption has become a key element in the current debate on global warming. Over the past two decades, Homogeneous Charge Compression Ignition (HCCI) engine technology has aroused a great deal of interest in the automotive sector owing to its fuel flexibility and ability to generate ultra-low exhaust emissions. One of the strategies to achieve ultra-low emissions in HCCI engines is to retain some exhaust gas/burnt products in the cylinder by dynamically actuating/varying valve opening and closing timings and lifts. This can be achieved by recent advancements in microprocessor, actuators and controller technologies. The first step in the synthesis of control algorithms involves developing simple system-level mathematical models. This thesis presents two such mathematical models of HCCI combustion. In the first part of this thesis, a control-oriented two-zone thermo-kinetic model of a single cylinder HCCI engine is presented. Earlier control laws were derived using single zone mathematical models of HCCI combustion; however, such models fail to accurately capture the combustion dynamics of an HCCI engine owing to the assumption of homogeneous composition and temperature in the cylinder. Certain multi-zone models of HCCI engines emphasizing the shortcomings of these single zone models have also been reported in literature. However, such models are far too complex and unwieldy for the development of fast and efficient controllers for HCCI engines. The present work outlines the modeling approach of a physics based two-zone model of a single-cylinder HCCI engine by incorporating the first law of thermodynamics and the temperature and concentration inhomogeneities within the cylinder in order to better predict emissions, peak pressures, and timing. A comparative analysis between the single zone and two-zone models is also discussed. The nonlinear model was linearized about an operating point to facilitate the development of an effective LQR regulator. The model inputs include variable valve timing to effectively control peak pressures, exhaust temperatures and ignition timing. In the second part of the thesis we address the shortcomings of control analysis which to date has been done by developing models that are engine specific, such models often rely on extensive parameters which are to be experimentally identified. Moreover, further investigation revealed that these models were valid only for a narrow operating range. Therefore, a detailed mathematical model of an HCCI engine, which is fuel flexible and valid for transitions in engine speed, is developed based on ideal gas laws and basic thermodynamics and conservation principles. The different engine subsystems and engine phenomena discretized into eight stages are modeled in a "control-oriented sense" to address the combustion timing, peak pressure and heat release rate control issues. The model has been implemented in MATLAB® to facilitate simulation studies and requires minimum tuning parameters to be experimentally recognized. Model validation is based on three sets of engine data, obtained from literature. The validation suggests that the model, once tuned properly, shows a fair agreement between the simulation and experimental data for a given engine and operating conditions.

Control and Robustness Analysis of Homogeneous Charge Compression Ignition Using Exhaust Recompression

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Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (756 download)

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Book Synopsis Control and Robustness Analysis of Homogeneous Charge Compression Ignition Using Exhaust Recompression by : Hsien-Hsin Liao

Download or read book Control and Robustness Analysis of Homogeneous Charge Compression Ignition Using Exhaust Recompression written by Hsien-Hsin Liao and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Physics-based Modeling and Control of Residual-affected HCCI Engines Using Variable Valve Actuation

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Publisher :
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.:/5 (794 download)

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Book Synopsis Physics-based Modeling and Control of Residual-affected HCCI Engines Using Variable Valve Actuation by : Gregory Matthew Shaver

Download or read book Physics-based Modeling and Control of Residual-affected HCCI Engines Using Variable Valve Actuation written by Gregory Matthew Shaver and published by . This book was released on 2005 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Actuation Strategies for Cycle-to-cycle Control of Homogeneous Charge Compression Ignition Combustion Engines

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Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (83 download)

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Book Synopsis Actuation Strategies for Cycle-to-cycle Control of Homogeneous Charge Compression Ignition Combustion Engines by : Adam F. Jungkunz

Download or read book Actuation Strategies for Cycle-to-cycle Control of Homogeneous Charge Compression Ignition Combustion Engines written by Adam F. Jungkunz and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The mounting evidence of anthropogenic climate change necessitates a significant effort to improve the internal combustion (IC) engine and reduce its adverse environmental impacts resulting from its ubiquitous use powering ground transportation. Homogenous Charge Compression Ignition (HCCI) engines present a promising opportunity to reduce the environmental consequences of using IC engines by reusing exhaust from one engine cycle to initiate combustion on the following engine cycle. The presence of high retained exhaust ratios in HCCI engines results in dilute, low-temperature combustion that achieves greater efficiencies and lower CO2 and NOx emissions than conventional spark-ignited or diesel engines. However, three critical obstacles prevent them from being widely adopted: first, unlike conventional IC engines, HCCI engines lack a direct combustion trigger to determine when combustion occurs, and that lack of a direct trigger makes specifying combustion timing challenging. Second, the high quantities of retained exhaust create a strong physical link between engine cycles, resulting in undesirable dynamics that could potentially lead to engine misfire at certain operating conditions. Finally, the high quantities of retained exhaust also prevent the engine from inducting as much fuel and air as possible, limiting the load range of the engine. This dissertation addresses all three of those obstacles by investigating the abilities of different actuators to control combustion timing and improve the dynamics at certain HCCI operating conditions that could be used to expand the load range of HCCI engines. A simple, physical model that represents one engine cycle as a discrete-time, nonlinear system captures the oscillatory dynamics present at certain HCCI operating conditions on an experimental engine. The physical model provides physical intuition about the sources driving the oscillations and the control actions needed to reduce them. A linearized version of the model depicts the source of those oscillations on a root locus, and shows that a negative real axis pole in a discrete-time, linear dynamical system drives the oscillations. Three different actuators, exhaust valve closing timing, pilot fuel injection timing, and main fuel injection mass, each reduce the oscillations. For each actuator, a linearization of the physical model illustrates how each actuator can be used with simple linear control laws to improve the dynamics at HCCI operating conditions. Then, the actuators are compared to each other on three aspects: the difficulty of the control problem associated with using the particular actuator to reduce the oscillations, the difficulty of implementing the actuator in a production vehicle, and the effectiveness of each actuator at reducing the oscillations.

Functional Reverse Engineering of Strategic and Non-Strategic Machine Tools

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Author :
Publisher : CRC Press
ISBN 13 : 1000401456
Total Pages : 299 pages
Book Rating : 4.0/5 (4 download)

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Book Synopsis Functional Reverse Engineering of Strategic and Non-Strategic Machine Tools by : Wasim Ahmed Khan

Download or read book Functional Reverse Engineering of Strategic and Non-Strategic Machine Tools written by Wasim Ahmed Khan and published by CRC Press. This book was released on 2021-06-21 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes capacity building in strategic and non-strategic machine tool technology. It includes machine building in sectors such as machine tools, automobiles, home appliances, energy, and biomedical engineering, along with case studies. The book offers guidelines for capacity building in academia, covering how to promote enterprises of functional reverse engineering enterprises. It also discusses machine tool development, engineering design, prototyping of strategic, and non-strategies machine tools, as well as presenting communication strategies and IoT, along with case studies. Professionals from the CNC (Computer Numeric Control) machine tools industry, industrial and manufacturing engineers, and students and faculty in engineering disciplines will find interest in this book.

AN INVESTIGATION OF VARIABLE VALVE TIMING EFFECTS ON HCCI ENGINE PERFORMANCE

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Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (122 download)

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Book Synopsis AN INVESTIGATION OF VARIABLE VALVE TIMING EFFECTS ON HCCI ENGINE PERFORMANCE by :

Download or read book AN INVESTIGATION OF VARIABLE VALVE TIMING EFFECTS ON HCCI ENGINE PERFORMANCE written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : The Homogeneous Charge Compression Ignition (HCCI) engine is a promising combustion concept for reducing NOx and particulate matter (PM) emissions and providing a high thermal efficiency in internal combustion engines. This concept though has limitations in the areas of combustion control and achieving stable combustion at high loads. For HCCI to be a viable option for on-road vehicles, further understanding of its combustion phenomenon and its control are essential. Thus, this thesis has a focus on both the experimental setup of an HCCI engine at Michigan Technological University (MTU) and also developing a physical numerical simulation model called the Sequential Model for Residual Affected HCCI (SMRH) to investigate performance of HCCI engines. The primary focus is on understanding the effects of intake and exhaust valve timings on HCCI combustion. For the experimental studies, this thesis provided the contributions for development of HCCI setup at MTU. In particular, this thesis made contributions in the areas of measurement of valve profiles, measurement of piston to valve contact clearance for procuring new pistons for further studies of high geometric compression ratio HCCI engines. It also consists of developing and testing a supercharging station and the setup of an electrical air heater to extend the HCCI operating region. The HCCI engine setup is based on a GM 2.0 L LHU Gen 1 engine which is a direct injected engine with variable valve timing (VVT) capabilities. For the simulation studies, a computationally efficient modeling platform has been developed and validated against experimental data from a single cylinder HCCI engine. In-cylinder pressure trace, combustion phasing (CA10, CA50, BD) and performance metrics IMEP, thermal efficiency, and CO emission are found to be in good agreement with experimental data for different operating conditions. Effects of phasing intake and exhaust valves are analyzed using SMRH. In addition, a novel index called Fuel Efficiency and Emissions (FEE) index is defined and is used to determine the optimal valve timings for engine operation through the use of FEE contour maps.

Hcci and Cai Engines for the Automotive Industry

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Author :
Publisher : Elsevier
ISBN 13 : 184569354X
Total Pages : 557 pages
Book Rating : 4.8/5 (456 download)

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Book Synopsis Hcci and Cai Engines for the Automotive Industry by : H Zhao

Download or read book Hcci and Cai Engines for the Automotive Industry written by H Zhao and published by Elsevier. This book was released on 2007-08-02 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 and CAI engines for the automotive industry presents the state-of-the-art in research and development on an international basis, as a one-stop reference work. The background to the development of HCCI / CAI engine technology is described. Basic principles, the technologies and their potential applications, strengths and weaknesses, as well as likely future trends and sources of further information are reviewed in the areas of gasoline HCCI / CAI engines; diesel HCCI engines; HCCI / CAI engines with alternative fuels; and advanced modelling and experimental techniques. The book provides an invaluable source of information for scientific researchers, R&D engineers and managers in the automotive engineering industry worldwide. Presents the state-of-the-art in research and development on an international basis An invaluable source of information for scientific researchers, R&D engineers and managers in the automotive engineering industry worldwide Looks at one of the most promising engine technologies around

1-D Simulation of HCCI Engine Performance Using Knock-integral Ignition Prediction with Wiebe Function Combustion Modeling, and Comparison to Advanced SI Engine Performance

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Publisher :
ISBN 13 :
Total Pages : 170 pages
Book Rating : 4.3/5 (129 download)

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Book Synopsis 1-D Simulation of HCCI Engine Performance Using Knock-integral Ignition Prediction with Wiebe Function Combustion Modeling, and Comparison to Advanced SI Engine Performance by : Andrew Michael Huisjen

Download or read book 1-D Simulation of HCCI Engine Performance Using Knock-integral Ignition Prediction with Wiebe Function Combustion Modeling, and Comparison to Advanced SI Engine Performance written by Andrew Michael Huisjen and published by . This book was released on 2010 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Characterization of Engine Control Authority on HCCI Combustion as the High Load Limit is Approached

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Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Characterization of Engine Control Authority on HCCI Combustion as the High Load Limit is Approached by :

Download or read book Characterization of Engine Control Authority on HCCI Combustion as the High Load Limit is Approached written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: While the potential emissions and efficiency benefits of homogeneous charge compression ignition (HCCI) combustion are well known, realizing the potentials on a production intent engine presents numerous challenges. In this study we focus on characterizing the authority of the available engine controls as the high load limit of HCCI combustion is approached. The experimental work is performed on a boosted single-cylinder research engine equipped with direct injection (DI) fueling, cooled external exhaust gas recirculation (EGR), and a hydraulic valve actuation (HVA) valve train to enable the negative valve overlap (NVO) breathing strategy. Valve lift and duration are held constant while phasing is varied in an effort to make the results as relevant as possible to production intent cam-based variable valve actuation (VVA) systems on multi-cylinder engines. Results presented include engine loads from 350 to 650 kPa IMEPnet and manifold pressure from 98 to 190 kPaa at 2000 rpm. It is found that in order to increase engine load to 650 kPa IMEPnet, it is necessary to increase manifold pressure and external EGR while reducing the NVO duration. Both NVO duration and fuel injection timing are effective means of controlling combustion phasing, with NVO duration being a coarse control and fuel injection timing being a fine control. NOX emissions are low throughout the study, with emissions below 0.1 g/kW-h at all boosted HCCI conditions, while good combustion efficiency is maintained (>96.5%). Net indicated thermal efficiency increases with load up to 600 kPa IMEPnet, where a peak efficiency of 41% is achieved. Results of independent parametric investigations are presented on the effect of external EGR, intake effect of manifold pressure, and the effect of NVO duration. It is found that increasing EGR at a constant manifold pressure and increasing manifold pressure at a constant EGR rate both have the effect of retarding combustion phasing. It is also found that combustion phasing becomes increasingly sensitive to NVO duration as engine load increases. Finally, comparisons are made between three commonly used noise metrics (AVL noise meter, ringing intensity (RI), and maximum pressure rise rate (MPRR)). It is found that compared to the AVL noise meter, RI significantly underestimates combustion noise under boosted conditions.

Engine Modeling and Control

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Publisher : Springer
ISBN 13 : 3642399347
Total Pages : 646 pages
Book Rating : 4.6/5 (423 download)

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Book Synopsis Engine Modeling and Control by : Rolf Isermann

Download or read book Engine Modeling and Control written by Rolf Isermann and published by Springer. This book was released on 2014-07-01 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Emerging Environmental Technologies

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Publisher : Springer Science & Business Media
ISBN 13 : 1402087861
Total Pages : 183 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Emerging Environmental Technologies by : Vishal Shah

Download or read book Emerging Environmental Technologies written by Vishal Shah and published by Springer Science & Business Media. This book was released on 2008-07-30 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this day and age, it is unfortunate that the economic prosperity and development leads to disruption of the dynamic balance of the environment. The philosophy of sustainable development has been presented for a long period of time but it has not been able to bring about a substantial change in our society. The transformation of this philosophy into a practical reality seems to be far away – at least in the foreseeable future. In my opinion, the only way I see the revolution taking place is for us to incorporate ‘sustainability’ in our daily living and to keep pushing for a sustainable society. Meanwhile, we also need scientists to work on technologies that would lead us to that goal at a faster pace. Technologies that are ‘completely’ environmentally friendly are needed urgently. And if such technologies or ideas of one exists, a platform is required that showcases such ideas to the scientific and non-scientific audience. Through this book, I am happy to present the thoughts of seven different research groups whose work may lead us to the doorsteps of sustainable society. As scientists, most of us specialize in a sub-topic that may be related to one of the three environmental components – air, land, or water. Over a period of time, we become so engrossed with the sub-discipline of our specialization that we only have glimpses of what is happening in other disciplines.

Modeling and Control of Homogeneous Charge Compression Ignition Engines with High Dilution

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Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Modeling and Control of Homogeneous Charge Compression Ignition Engines with High Dilution by : Chia-Jui Chiang

Download or read book Modeling and Control of Homogeneous Charge Compression Ignition Engines with High Dilution written by Chia-Jui Chiang and published by . This book was released on 2006 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Combustion Timing Control of Natural Gas HCCI Engines Using Physics-based Modeling and LQR Controller

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Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (813 download)

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Book Synopsis Combustion Timing Control of Natural Gas HCCI Engines Using Physics-based Modeling and LQR Controller by : Marwa Abdelgawad

Download or read book Combustion Timing Control of Natural Gas HCCI Engines Using Physics-based Modeling and LQR Controller written by Marwa Abdelgawad and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Homogeneous Charge Compression Ignition (HCCI) Engines hold promises of being the next generation of internal combustion engines due to their ability to produce high thermal efficiencies and low emission levels. HCCI combustion is achieved through the auto-ignition of a compressed homogenous fuel-air mixture, thus making it a "fusion" between spark-ignition and compression-ignition engines. The main challenge in developing HCCI engines is the absence of a combustion trigger hence making it difficult to control its combustion timing. The aim of this research project is to model and control a natural gas HCCI engine. Since HCCI depends primarily on temperature and chemical composition of the mixture, Exhaust Gas Recirculation (EGR) is used to control ignition timing. In this research, a thermodynamical, physics-based nonlinear model is developed to capture the main features of the HCCI engine. In addition, the Modified Knock Integral Model (MKIM), used to predict ignition timing, is optimized. To validate the nonlinear model, ignition timing under varying conditions using the MKIM approach is shown to be in accordance with data acquired from a model developed using a sophisticated engine simulation program, GT-Power. Most control strategies are based on a linear model, therefore, the nonlinear model is linearized using the perturbation method. The linear model is validated by comparing its performance with the nonlinear model about a suitable operating point. The control of ignition timing can be defined as a regulation process where the goal is to force the nonlinear model to track a desired ignition timing by controlling the EGR ratio. Parameters from the linear model are used to determine the gains of the LQR controller. The performance of the controller is validated by implementing it on the nonlinear model and observing its ability to track the desired timing with 0.5% error within a certain operating range. To increase the operating range of the controller and reduce steady-state error, an integrator is added to the LQR. Finally, it is shown that the LQR controller is able to successfully reject disturbance, parameter variation, as well as noise.

Informatics in Control, Automation and Robotics

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Author :
Publisher : Springer Science & Business Media
ISBN 13 : 3319035002
Total Pages : 319 pages
Book Rating : 4.3/5 (19 download)

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Book Synopsis Informatics in Control, Automation and Robotics by : Jean-Louis Ferrier

Download or read book Informatics in Control, Automation and Robotics written by Jean-Louis Ferrier and published by Springer Science & Business Media. This book was released on 2014-01-06 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes extended and revised versions of a set of selected papers from the Ninth International Conference on Informatics in Control Automation and Robotics (ICINCO 2012), held in Rome, Italy, from 28 to 31 July 2012. The conference was organized in four simultaneous tracks: Intelligent Control Systems and Optimization, Robotics and Automation, Systems Modeling, Signal Processing and Control and Industrial Engineering, Production and Management. ICINCO 2012 received 360 paper submissions, from 58 countries in all continents. From these, after a blind review process, only 40 were accepted as full papers, of which 20 were selected for inclusion in this book, based on the classifications provided by the Program Committee. The selected papers reflect the interdisciplinary nature of the conference as well as the logic equilibrium between the four abovementioned tracks. The diversity of topics is an important feature of this conference, enabling an overall perception of several important scientific and technological trends.

Proceedings of the ASME Dynamic Systems and Control Division

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Author :
Publisher :
ISBN 13 :
Total Pages : 864 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Proceedings of the ASME Dynamic Systems and Control Division by :

Download or read book Proceedings of the ASME Dynamic Systems and Control Division written by and published by . This book was released on 2006 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: