Preface

Chapter 8 **Power Cylinder System for Internal Combustion Engines 161**

Chao Cheng

**VI** Contents

This book on internal combustion engines consists of eight chapters from the research activi‐ ties through the wide range of engine performances, emission parameters, and alternative fuels. The first three sections are related to the use of alternative fuels and the stability changes of model fuel blends used in internal combustion engines. The following two sec‐ tions deal with advanced combustion technology and combustion control strategy. Emission measurement methodology is given in the sixth section. The last two sections present mod‐ elling studies for modern engine systems. I believe that this book contributes to the readers to follow current improvement trends for internal combustion engine and it can be used by postgraduate students.

#### **Assoc. Prof. Dr. Bilge Albayrak Ceper**

Department of Mechanical Engineering Erciyes University Melikgazi/Kayseri Turkey

#### **Research Assistant Melih Yıldız**

Erciyes University Melikgazi/Kayseri Turkey

**Chapter 1**

**Provisional chapter**

**Study of Stability Changes of Model Fuel Blends**

Fuel during long-term storage, even at low temperatures, undergoes oxidation to various products, which are further converted into high molecular compounds precipitating from the liquid. The stability of the stored fuel depends on its chemical composition and storage conditions. Chemical conversions associated with the degradation of fuel are not well recognized, so it is difficult to predict the storage duration of such fuel and control the rate of ageing. Because of the variety of hydrocarbon composition of commercial fuels resulting from the diversity of crude oil and oil processing methods, surrogate fuels are used for simulating behaviour of commercial fuels in the various tests. In this paper, the type and dose of model components of fuel were chosen. To determine the degradation degree of model blends, few tests of accelerated ageing were selected. These methods were used to determine induction period, content of deposits and resistance to oxidation. Effect of inhibiting and catalyzing compounds on fuel oxidation was verified. An infrared spectroscopy analysis of the oxidized model blends was also performed. The results of this study showed slight changes of selected properties of the surrogate fuels. The most significant changes occurred for the model blends containing substances initiating radi-

**Keywords:** model fuels, hydrocarbons, oxidative stability, induction period, accelerated

Chemical stability of fuel, in terms of resistance to changes during storage and distribution, is an important parameter determining its quality. Processes deteriorating the fuel properties include, among others, oxidation. The oxidation products are chemically active substances and undergo further transformations to non-volatile macromolecular substance (resin), and the particulates precipitate in the form of deposits/sediments. Fuels, even under stable storage

**Study of Stability Changes of Model Fuel Blends**

© 2016 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution,

© 2018 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

and reproduction in any medium, provided the original work is properly cited.

Małgorzata Odziemkowska, Joanna Czarnocka and

Additional information is available at the end of the chapter

cal autoxidation reactions and bio-components.

Additional information is available at the end of the chapter

Małgorzata Odziemkowska, Joanna Czarnocka and Katarzyna Wawryniuk

Katarzyna Wawryniuk

http://dx.doi.org/10.5772/67056

**Abstract**

ageing test

**1. Introduction**

**Provisional chapter**
