Advanced Engine Technologies for Turbochargers Solutions

Rareș-Lucian Chiriac,Ulf Kurella,Anghel Chiru,Răzvan Gabriel Boboc

doi:10.3390/app112110075

Rareș-Lucian Chiriac, Ulf Kurella + Show 2 more

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https://doi.org/10.3390/app112110075

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Abstract

Research in the process of internal combustion engines shows that their efficiency can be increased through several technical and functional solutions. One of these is turbocharging. For certain engine operating modes, the available energy of the turbine can also be used to drive an electricity generator. The purpose of this paper is to highlight the possibilities and limitations of this solution. For this purpose, several investigations were carried out in the virtual environment with the AMESim program, as well as experimental research on a diesel engine for automobiles and on a stand for testing turbochargers (Turbo Test Pro produced by CIMAT). The article also includes a comparative study between the power and torque of the naturally aspirated internal combustion engine and equipped with a hybrid turbocharger. The results showed that the turbocharger has a very high operating potential and can be coupled with a generator without decreasing the efficiency of the turbocharger or the internal combustion engine. The main result was the generation of electrical power of 115 W at a turbocharger shaft speed of 140,000–160,000 rpm with an electric generator shaft speed of 14,000–16,000 rpm. There are many constructive solutions for electrical turbochargers with the generator positioned between the compressor and the turbine wheel. This paper is presenting a solution of a hybrid turbocharger with the generator positioned and coupled with the compressor wheel on the exterior side.

Highlights

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Summary

Introduction

Research in the process of internal combustion engines shows that their efficiency can be increased through several technical and functional solutions. Hybrid power trains for city cars were developed in tight contact with turbocharger systems [3]. These applications were made for hybrid city cars [4]. A turbocharger has the role of helping to introduce a greater amount of fresh air into the cylinders of an engine and at the same time to reduce emissions [6]. They can be used to produce electricity. The electric flue gas turbocharger used an excessive part of the flue gas flow to generate electricity as an alternator and to store it either by recovery in the high voltage lithium-ion battery or to transmit it as additional propulsion to another electric motor [8]

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