Introduction to Internal Combustion Engines

By G. Fiengo, A. Gaeta, A. Palladino, V. Giglio. 2013

436 citations recorded by the source corpus.

The Internal Combustion Engine (ICE) is the technological innovation that has changed the world. It is considered both as one of the greater sources of benefits and one of the main reasons of the atmospheric pollution. Therefore, in order to satisfy polluting emission legislations with particular attention for CO2 production, the engine design has been continuously improved and new components have been introduced, such as sensors and complete subsystems. The generation of polluting substances produced by the combustion depends not only on the engine structure, but also on the engine management system that is mainly responsible for the engine behavior, and so for the emission levels. Because of the introduction of new electronic components, which determines a strong increase of the degrees of freedom available during the engine operations, the optimization of engine behavior becomes more complex and less intuitive thus not obtaining the best performances of the system. Nowadays, the engine control system is an enormous collection of tuning tables, obtained adding the new tables related to new electronic components to the previous ones. This control structure is usually defined using trial-and-error approaches: engineers dedicated to the calibration process transform the goals, such as fuel consumption, engine emission, performances of the vehicle, and so on, in control references to be followed by some engine and vehicle variables that can be measured on-line. These goals are obtained through proper closed-loop control strategies receiving measurements by sensors and acting on actuators. In this chapter after a short description of the operating principles of reciprocating ICEs and their classification, an overview of a functional architecture of an Engine Management System (EMS) is given.

Subfields: Automotive Engineering, Biomedical Engineering, Fluid Flow and Transfer Processes

View Paper: https://www.semanticscholar.org/paper/728d04c85f77aba1137860801eead7104f661e46