Introduction to Turbocharging—A Perspective on Air Management System

Subramani, D. A.; Dhinagaran, R.; Prasanth, V. R.

doi:10.1007/978-981-15-0970-4_4

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…The AFR according to this equation is termed a stoichiometric ratio, and its value comes out to be 14.6:1 for gasoline fuel [45,46]. In an IC engine, the main purpose of the AFR controller is to maintain the value of AFR for efficient working of the engine [47][48][49].…”

Section: Air-fuel Ratio Controlmentioning

confidence: 99%

Design of a Hybrid Fault-Tolerant Control System for Air–Fuel Ratio Control of Internal Combustion Engines Using Genetic Algorithm and Higher-Order Sliding Mode Control

et al. 2022

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Fault-tolerant control systems (FTCS) are used in safety and critical applications to improve reliability and availability for sustained operation in fault situations. These systems may be used in process facilities to reduce significant production losses caused by irregular and unplanned equipment tripping. Internal combustion (IC) engines are widely used in the process sector, and efficient air–fuel ratio (AFR) regulation in the fuel system of these engines is critical for increasing engine efficiency, conserving fuel energy, and protecting the environment. In this paper, a hybrid fault-tolerant control system has been proposed, being a combination of two parts which are known as an active fault-tolerant control system and a passive fault-tolerant control system. The active part has been designed by using the genetic algorithm-based fault detection and isolation unit. This genetic algorithm provides estimated values to an engine control unit in case of a fault in any sensor. The passive system is designed by using the higher-order sliding mode control with an extra fuel actuator in the fuel supply line. The performance of the system was tested experimentally in MATLAB/Simulink environment. Based on the simulation results, the designed system can sustain the AFR despite sensor failures. A new method of managing the AFR of an IC engine has been demonstrated in this study, and it is highly capable, robust, reliable, and highly effective. A comparison with the existing works found in the literature also proves its superior performance. By inserting the fault in each sensor, it was clearly observed that proposed HFTCS was much better than the existing model as it was more fault-tolerant due to its ability to work in both online and offline modes. It also provided an exact value of 14.6 of AFR without any degradation.

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Section: Air-fuel Ratio Controlmentioning

confidence: 99%

Design of a Hybrid Fault-Tolerant Control System for Air–Fuel Ratio Control of Internal Combustion Engines Using Genetic Algorithm and Higher-Order Sliding Mode Control

et al. 2022

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“…Turbocharging is a key component of reciprocating internal combustion engines since it participates in a large part to the enhancement of the engine power and its dynamic response. 1 Subramani et al 2 presented a perspective on the air management system of internal combustion engines. They reported the important role of the turbocharger in reducing engine loss and pollutant emissions.…”

Section: Introductionmentioning

confidence: 99%

Analysis of performance and time lag of turbocharger turbines fed with gasoline and diesel burnt gases and air under pulsating flow conditions

Ketata

Driss

2022

International Journal of Engine Research

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The turbine, an enabling component of turbochargers, is a seat of highly complex unsteady flow as well as varying gas compositions between diesel and gasoline engines. Thus, it is necessary to take into account different physical models when simulating such turbines. Researchers have often considered the turbine working gas as air, which may not lead to an accurate prediction of actual turbine characteristics. In the present work, the effect of the working gas on the performance of turbocharger turbines as well as on the turbo lag was investigated through a set of numerical simulations for six wastegate opening degrees from 0% up to 100% and under a wide range of the flow pulse frequency ranging from 33.33 up to 166.66 Hz. Four working fluids were involved in this study which are the gasoline burnt gas, diesel burnt gas, air with like gasoline engine waves, and air with like diesel engine waves. The performance of the turbine and its responsiveness quantified as the time lag with burnt gases from both diesel and gasoline engines were compared to those with air. Results showed totally deviated unsteady performance characteristics compared to the turbine working with air. Results also confirmed that considering the working fluid as air may not lead to a fair representation of the actual turbine performance characteristics. The findings of this work put emphasis on the importance of the gas composition when modeling such turbines by engineers especially during the design process where a good turbocharger-engine match has to be met.

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“…14 The use of a turbine lowers the amount of turbocharger lag and improves the transient performance of the system. 15…”

Section: Introductionmentioning

confidence: 99%

“…14 The use of a turbine lowers the amount of turbocharger lag and improves the transient performance of the system. 15 Numerical simulation methods and empirical measurements are mainly used to determine temperatures in engineering devices. By increasing the accuracy of turbocharger simulations, their use has increased in the development of internal combustion engines.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation on the heat transfer of an automotive engine’s turbocharger

Basir

Gharehghani

Ahmadi

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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Measuring the temperature distribution in a complex and important engine part, such as a turbocharger, is essential for improving engine performance and efficiency. Heat transfer from the turbine to the compressor can strongly influence the turbocharger performance. One of the main measurement methods involves the installation of multiple K-type sensors. However, the location as well as the maximum and minimum temperatures of the turbocharger and the subsequent critical points may not be obtained by using sensors. In the current study, thermocouples, as well as an infra-red camera, are used to study the temperature distribution of the turbocharger housing in a spark ignition engine. A new method is introduced to determine the thermal radiation coefficient of the turbocharger housing by using a laboratory furnace and an infra-red camera. Together with experiments, the finite element method is used to find the temperature distribution in the turbocharger for all thicknesses. Comparing the temperature distribution obtained from simulation with experimental data, an acceptable level of agreement is observed. The location and temperature of the hottest area in experimental and numerical investigations are close to the waste gate. Temperatures using the finite element method for bearings exhibit maximum and minimum errors of 4.9% and 2.3%, respectively, indicating reasonable accuracy for the simulation.

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Introduction to Turbocharging—A Perspective on Air Management System

Cited by 5 publications

References 9 publications

Design of a Hybrid Fault-Tolerant Control System for Air–Fuel Ratio Control of Internal Combustion Engines Using Genetic Algorithm and Higher-Order Sliding Mode Control

Design of a Hybrid Fault-Tolerant Control System for Air–Fuel Ratio Control of Internal Combustion Engines Using Genetic Algorithm and Higher-Order Sliding Mode Control

Analysis of performance and time lag of turbocharger turbines fed with gasoline and diesel burnt gases and air under pulsating flow conditions

Experimental and numerical investigation on the heat transfer of an automotive engine’s turbocharger

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