M. S. Janota

Bio: M. S. Janota is an academic researcher from Queen Mary University of London. The author has contributed to research in topics: Turbocharger & Turbine. The author has an hindex of 2, co-authored 12 publications receiving 826 citations.

Turbocharging the internal combustion engine

Abstract: Internal Combustion EnginesInternal Combustion EnginesTurbocharging the Internal Combustion EngineAdvances in Turbocharged Racing EnginesIntroduction to Modeling and Control of Internal Combustion Engine SystemsStreet TurbochargingHP1488Supercharging of Internal Combustion EnginesIntroduction to Internal Combustion EnginesA Methodology for Turbocharging Single Cylinder Four Stroke Internal Combustion EnginesInternal Combustion Engine FundamentalsTurbocharging : The internal combustion engineMaximum BoostInternal Combustion Engines10th International Conference on Turbochargers and TurbochargingCombustion EnginesCharacterizing and Designing Engine Manifolds for Single-cylinder Engine TurbochargingTurbocharging the Internal Combustion EngineDiesel Engine ProcessesTurbocharging of Small Internal Combustion Engines as a Means of Improving Engine/Application System Fuel Economy8th International Conference on Turbochargers and TurbochargingSupercharging the Reciprocating Internal Combustion EngineCharging the Internal Combustion EngineEngineering Fundamentals of the Internal Combustion Engine: Pearson New International EditionTurbocharging of Small Internal Combustion Engine as a Means of Improving Engine/Application System Fuel Economy-Further Turbocharger ImprovementsDiesel Engine Transient OperationCost, Effectiveness, and Deployment of Fuel Economy Technologies for Light-Duty VehiclesHandbook of Air Pollution from Internal Combustion EnginesFundamentals of TurbochargingAdvances in Internal Combustion Engines and Fuel TechnologiesTurbochargers and Turbocharging11th International Conference on Turbochargers and TurbochargingPounder's Marine Diesel Engines and Gas TurbinesDesign and Development of Heavy Duty Diesel EnginesInternal Combustion Engines14th International Conference on Turbochargers and TurbochargingDesigning and Analyzing the Turbocharging of a Hydrogenfueled Internal Combustion Engine in a Hybrid VehicleTurbocharging the Internal Combustion EngineInternal Combustion EnginesSupercharging the Reciprocating Internal Combustion Engine with Special Reference to TurbochargingVehicular Engine Design

Introduction to Turbocharging and Turbochargers

Abstract: Supercharging can be defined as the introduction of air (or air/fuel mixture) into an engine cylinder at a density greater than ambient. This allows a proportional increase in the fuel that can be burned and hence raises the potential power output. The principal objective is to increase power output, not to improve efficiency, although the efficiency may benefit. The effect of supercharging on power output can be seen from a cylinder pressure/volume (P-V) diagram. Figure 1.1 shows an ideal naturally aspirated dual-combustion cycle. Point 1 denotes the beginning of the compression stroke when the piston is at bottom dead centre (BDC). Process 1–2 is the compression stroke. 2–3 is the part of the combustion process occurring (instantaneously) at constant volume (top dead centre, TDC). 3–4 is the remaining part of the combustion process occurring at constant pressure while the piston is moving along the cylinder. 4–5 is the continuation of the expansion process following the end of combustion. At point 5 the exhaust valve opens, allowing some exhaust gas to leave the cylinder and the pressure to fall back to the ambient level. The intake and exhaust processes are not shown.

Diesel Engine Exhaust Emissions and Noise

Abstract: The upsurge of interest in environmental quality during the 1970s has resulted in much existing and proposed legislation for diesel exhaust emissions and noise. The bulk of this legislation is aimed at vehicles, but stationary power sources are not immune. The movement towards current legislation had two separate sources. First came general public hostility to the black smoke emitted from a substantial number of diesel engined trucks in the United Kingdom and Europe, followed by complaints directed at all noisy transportation means (aircraft, diesel trucks, cars and motorcycles). Meanwhile, in the United States the public nuisance of the Los Angeles ‘smog’ prompted the start of a major series of environmental quality laws. Although the number of diesel engined vehicles is increasing in the United States, the total proportion of vehicles so equipped (relative to petrol engines) remains low compared with that in Europe. Thus it was the petrol engine rather than the diesel engine that was originally singled out for criticism.

Constant Pressure Turbocharging

Abstract: The basic objective of turbocharging is simply stated: to supercharge the engine using the energy of the exhaust gases to drive a compressor via a turbine. A considerable fraction of the energy released by combustion of the fuel/air mixture in any engine is lost through the exhaust system (30 to 40 per cent). In the design of a turbocharging system it is of the utmost importance to utilise the exhaust gas energy leaving the engine and arriving at the turbocharger turbine to full advantage. Two principal systems have been briefly introduced in chapter 1. In this chapter the constant pressure (or ‘single-pipe’) system will be considered in detail, together with a discussion of its application to two-stroke and four-stroke engines designed for various duties.

Calibration Method for In-Process Identification of Tangential Specific Cutting Force in Milling

Abstract: The cutting forces that occur during machining cause static and dynamic deformations of the machine–tool–workpiece system. In general, the cutting force is spatial. However, knowledge of the tangential component of the cutting force is crucial for the optimum use of the power installed on the spindle. An important parameter for cutting force modeling is the tangential cutting force coefficient. This paper focuses on the approach of the in-process identification of the cutting and edge components of the tangential cutting force coefficient, using the spindle power signal read directly from the machine tool control system. Such procedures have already been described in the available literature. The key point for the successful implementation of these methods is the identification and avoidance of the passive torque signal. This paper describes the operational calibration of the spindle drive system. The calibration procedure is based on the tap test using modal hammer excitation and the spindle power signal response. The proposed procedure was successfully validated using a machine–machine comparison approach and a machine–dynamometer validation approach. The results are consistent with those in the available literature. With this method, we were able to determine the cutting component of the tangential specific cutting force with a deviation of 1% from the reference system and an edge component of 10%. The modal hammer method only enables the avoidance of dynamometers in the machine calibration procedure.

Distributed Generation Interface to the CERTS Microgrid

Abstract: This paper focuses on the energy storage system and the power electronic interface included in microsources of the CERTS microgrid. CERTS stands for the Consortium for Electric Reliability Technology Solutions. The consortium was formed in 1999 to research, develop, and disseminate new methods, tools, and technologies to protect and enhance the reliability of the U.S. electric power system and efficiency of competitive electricity markets. To provide the plug-and-play feature and the power quality requirements of the CERTS microgrid, all microsources regardless of their prime mover type must have a unified dynamic performance. This necessitates attaching an energy storage module to some or all of the microsources. The storage module is attached to the prime mover through a power electronic interface that couples the microsource to the microgrid. Details of the energy storage module, the power electronic interface and the corresponding controls are described. Performance of an example microsource, which includes a synchronous generator, a storage module and an electronic interface, is studied. Dynamic performance of the example microsource when operating in the CERTS microgrid is evaluated based on digital time-domain simulations in the EMTP-RV software environment. Effectiveness of the storage module, the electronic interface and the corresponding controls in enhancing the microsource performance is verified.

Control of variable geometry turbocharged diesel engines for reduced emissions

Abstract: The emission control problem for an automotive direct injected compression ignition (diesel) engine equipped with exhaust gas recirculation (EGR) and a variable geometry turbocharger (VGT) is considered The objective is to operate the engine to meet driver's torque demand and minimize NO/sub x/ emissions while at the same time avoiding visible smoke generation It is demonstrated that the steady-state optimization of engine emissions results in operating points where EGR and VGT actuators are in effect redundant in their effect on the variables that most directly affect the emissions A multivariable feedback controller is proposed which accounts for this actuator redundancy Furthermore, it coordinates the two actuators to fully utilize their joint effect on engine emission performance Experimental results confirm good response properties of the proposed controller

Turbocharged Diesel Engine Modeling for Nonlinear Engine Control and State Estimation

Abstract: Engine models that are used for nonlinear diesel engine control, state estimation, and model-based diagnostics are presented in this paper. By collecting, modifying, and adding to current available engine modeling techniques, two diesel engine models, a mean torque production model and a cylinder-by-cylinder model, are summarized for use in the formulation of control and state observation algorithms. In the cylinder-by-cylinder model, a time-varying crankshaft inertia model is added to a cylinder pressure generator to simulate engine speed variations due to discrete combustion events. Fuel injection timing and duration are control inputs while varying engine speed, cylinder pressure, and indicated torque are outputs from simulation. These diesel engine models can be used as engine simulators and to design diesel engine controllers and observers.