Performance Simulation And Control Design For Diesel Engine Nox Emission Reduction Technologies
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Performance Simulation and Control Design for Diesel Engine NOx Emission Reduction Technologies
Fuel efficiency and emission reductions are the two consistent drivers for internal combustion engine development for both on-highway and off-road vehicles. Advanced combustion technologies are proposed for the improvement of fuel consumption and reduction of harmful gas production inside the cylinder in laboratory engines. Outside cylinder technologies and after-treatment are the alternatives for a production engine to meet the stringent emission standards. Advanced control technologies play important roles in the realization of new technologies. This research was aimed at investigating possible techniques and feasible methods of implementation to reduce diesel engine emissions to meet the more stringent Tier 4 standards. In this study, two technologies are studied for off-road diesel engine NOx emission reductions: stoichiometric combustion ignition (SCI) and lean NOx trap (LNT). The concept of the stoichiometric compression ignition (SCI) engine was investigated for implementation in a turbocharged diesel engine through co-simulation. At first, an integrated environment for 1D engine modeling with control function was proposed for a SCI performance evaluation and control implementation. The SCI engine has been evaluated by Constant Speed Load Acceptance tests under steady-state and transient conditions. For SCI implementations, basic controls have been designed including air-fuel ratio (AFR) control, torque limiting control and idle speed control. The proposed control strategies have been verified with 1D detail models in the integrated environments. Further, the Mean Value Engine Model (MVEM) is proposed for advanced model based control design. The SCI engine subsystems are modeled using an orifice constrain model for throttle, turbine, and wastegate; filling and emptying model for intake and exhaust manifolds; rotational dynamic for engine camshaft and turbocharger shift, air-charging model and exhaust properties regressed by the data from integrated simulation at different engine operating conditions. The MVEM was implemented in Matlab/Simulink for verification. Modular and system verification was conducted for steady-state and transient state consistency with the 1D detail model. The results are promising, but the whole system needs further tuning for dynamic control design. The lean-NOx trap, as an alternative after-treatment for NOx control, has been studied for generic diesel engine emission control. Based on experimental data, an improved NOx adsorption model is proposed for integrated engine control and optimization.
Advances in IC Engines and Combustion Technology
This book comprises select peer-reviewed proceedings of the 26th National Conference on IC Engines and Combustion (NCICEC) 2019 which was organised by the Department of Mechanical Engineering, National Institute of Technology Kurukshetra under the aegis of The Combustion Institute-Indian Section (CIIS). The book covers latest research and developments in the areas of combustion and propulsion, exhaust emissions, gas turbines, hybrid vehicles, IC engines, and alternative fuels. The contents include theoretical and numerical tools applied to a wide range of combustion problems, and also discusses their applications. This book can be a good reference for engineers, educators and researchers working in the area of IC engines and combustion.
Cutting-Edge Marine Diesel Engine Technologies
"Cutting-Edge Marine Diesel Engine Technologies" offers an enlightening exploration into the dynamic world of maritime engineering and environmental responsibility. This comprehensive guide highlights the pivotal role of innovative diesel engine technologies in reducing the environmental impact of the shipping industry. With a keen focus on sustainability, we delve into the latest breakthroughs in marine propulsion systems, shedding light on cutting-edge technologies designed to significantly reduce emissions. Through a blend of technical insight and accessible language, we unravel the intricacies of cleaner fuels, advanced engine designs, and enhanced efficiency measures. The narrative not only provides a comprehensive understanding of the technical aspects but also emphasizes the broader implications for global environmental conservation. "Cutting-Edge Marine Diesel Engine Technologies" is a vital resource for engineers, environmentalists, policymakers, and anyone interested in steering the maritime industry toward a greener future. By spotlighting the intersection of innovation and ecological responsibility, this book serves as a compelling guide for navigating the seas of progress towards a more sustainable and environmentally conscious maritime landscape.