Author: Jungsoo ParkPublisher:
ISBN:
Category : Technology
Languages : en
Pages :
Book Description
Optimization of Diesel Engine with Dual-Loop EGR by Using DOE Method.
Optimization of Diesel Engine with Dual-Loop EGR by Using DOE Method
Author: Jungsoo ParkPublisher:
ISBN:
Category : Technology
Languages : en
Pages :
Book Description
Optimization of Diesel Engine with Dual-Loop EGR by Using DOE Method.
Optimization and Control of a Dual-loop EGR System in a Modern Diesel Engine
Author: Yunfan ZhangPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Focusing on the author's research aspects, the intelligent optimization algorithm and advanced control methods of the diesel engine's air path have been proposed in this work. In addition, the simulation platform and the HIL test platform are established for research activities on engine optimization and control. In this thesis, it presents an intelligent transient calibration method using the chaos-enhanced accelerated particle swarm optimization (CAPSO) algorithm. It is a model-based optimization approach. The test results show that the proposed method could locate the global optimal results of the controller parameters within good speed under various working conditions. The engine dynamic response is improved and a measurable drop of engine fuel consumption is acquired. The model predictive control (MPC) is selected for the controllers of DLEGR and VGT in the air-path of a diesel engine. Two MPC-based controllers are developed in this work, they are categorized into linear MPC and nonlinear MPC. Compared with conventional PIO controller, the MPC-based controllers show better reference trajectory tracking performance. Besides, an improvement of the engine fuel economy is obtained. The HIL test indicates the two controllers could be implemented on the real engine.
Optimization of Dual Loop EGR of a V6 3.0 Liter Diesel Engine for CO2 Reduction
Author: Haewook LeeDiesel Engine
Author: Saiful BariPublisher: BoD – Books on Demand
ISBN: 9535111205
Category : Technology & Engineering
Languages : en
Pages : 282
Book Description
Diesel engines, also known as CI engines, possess a wide field of applications as energy converters because of their higher efficiency. However, diesel engines are a major source of NOX and particulate matter (PM) emissions. Because of its importance, five chapters in this book have been devoted to the formulation and control of these pollutants. The world is currently experiencing an oil crisis. Gaseous fuels like natural gas, pure hydrogen gas, biomass-based and coke-based syngas can be considered as alternative fuels for diesel engines. Their combustion and exhaust emissions characteristics are described in this book. Reliable early detection of malfunction and failure of any parts in diesel engines can save the engine from failing completely and save high repair cost. Tools are discussed in this book to detect common failure modes of diesel engine that can detect early signs of failure.
Optimization Methods for the Mixture Formation and Combustion Process in Diesel Engines
Author: Jost WeberPublisher: Cuvillier Verlag
ISBN: 3867277249
Category : Dieselmotor - Gemischbildung - Verbrennung - Numerische Strömungssimulation - Flamelet-Modell - Genetischer Algorithmus
Languages : en
Pages : 265
Book Description
Modeling and Control of EGR on Marine Two-Stroke Diesel Engines
Author: Xavier LlamasPublisher: Linköping University Electronic Press
ISBN: 9176853683
Category :
Languages : en
Pages : 48
Book Description
The international marine shipping industry is responsible for the transport of around 90% of the total world trade. Low-speed two-stroke diesel engines usually propel the largest trading ships. This engine type choice is mainly motivated by its high fuel efficiency and the capacity to burn cheap low-quality fuels. To reduce the marine freight impact on the environment, the International Maritime Organization (IMO) has introduced stricter limits on the engine pollutant emissions. One of these new restrictions, named Tier III, sets the maximum NOx emissions permitted. New emission reduction technologies have to be developed to fulfill the Tier III limits on two-stroke engines since adjusting the engine combustion alone is not sufficient. There are several promising technologies to achieve the required NOx reductions, Exhaust Gas Recirculation (EGR) is one of them. For automotive applications, EGR is a mature technology, and many of the research findings can be used directly in marine applications. However, there are some differences in marine two-stroke engines, which require further development to apply and control EGR. The number of available engines for testing EGR controllers on ships and test beds is low due to the recent introduction of EGR. Hence, engine simulation models are a good alternative for developing controllers, and many different engine loading scenarios can be simulated without the high costs of running real engine tests. The primary focus of this thesis is the development and validation of models for two-stroke marine engines with EGR. The modeling follows a Mean Value Engine Model (MVEM) approach, which has a low computational complexity and permits faster than real-time simulations suitable for controller testing. A parameterization process that deals with the low measurement data availability, compared to the available data on automotive engines, is also investigated and described. As a result, the proposed model is parameterized to two different two-stroke engines showing a good agreement with the measurements in both stationary and dynamic conditions. Several engine components have been developed. One of these is a new analytic in-cylinder pressure model that captures the influence of the injection and exhaust valve timings without increasing the simulation time. A new compressor model that can extrapolate to low speeds and pressure ratios in a physically sound way is also described. This compressor model is a requirement to be able to simulate low engine loads. Moreover, a novel parameterization algorithm is shown to handle well the model nonlinearities and to obtain a good model agreement with a large number of tested compressor maps. Furthermore, the engine model is complemented with dynamic models for ship and propeller to be able to simulate transient sailing scenarios, where good EGR controller performance is crucial. The model is used to identify the low load area as the most challenging for the controller performance, due to the slower engine air path dynamics. Further low load simulations indicate that sensor bias can be problematic and lead to an undesired black smoke formation, while errors in the parameters of the controller flow estimators are not as critical. This result is valuable because for a newly built engine a proper sensor setup is more straightforward to verify than to get the right parameters for the flow estimators.
A Robust Control Approach on Diesel Engines with Dual-loop Exhaust Gas Recirculation Systems
Author: Benjamin HaberPublisher:
ISBN:
Category :
Languages : en
Pages : 89
Book Description
Chapter 1 explores the benefits when operating in advanced combustion modes and potentials for expanding their operating range with the use of the proposed complex air-path system. A linear state-space representation of the air-path system is then identified in Chapter 2 using the GT-Power model which serves as the basis for developing a MIMO feedback controller. The performance of the MIMO feedback controller, and its coupling with a feed-forward controller, are then developed and validated through the GT-Power engine simulation in Chapter 3. Finally, in Chapter 4, a decentralized feedback controller is made which relies on much more basic principles of multivariable control and is compared to the MIMO feedback controller to examine the benefits of using advanced controller development strategies. Concluding remarks and future work are then given in Chapter 5.
An Investigation Into Optimization of Heavy-duty Diesel Engine Operating Parameters when Using Multiple Injections and EGR
Author: David T. MontgomeryPublisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 332
Book Description
Author: Srinivas Jayaraman
Author: Nassim Khaled