http://dspace.univ-djelfa.dz:8080/xmlui/handle/123456789/6322 2026-06-24T03:07:25Z http://dspace.univ-djelfa.dz:8080/xmlui/handle/112/8317 Handout of courses Internal Combustion Engine BENDRISS, Abdelkader This course is intended for third-year undergraduate students (LMD system) specializing in Mechanical Construction. It is designed to provide students with the knowledge and methodological tools required to carry out thermodynamic analysis and synthesis studies of internal combustion engines. The course content has been developed in accordance with the official curriculum of the sixth semester of the third-year undergraduate program in Mechanical Construction. Internal combustion engines are among the most important technological achievements in modern mechanical engineering. They are widely used in transportation, industrial applications, power generation, agriculture, and marine systems due to their ability to efficiently and reliably convert the chemical energy of fuels into usable mechanical energy. The study of internal combustion engines integrates several engineering disciplines, including thermodynamics, fluid mechanics, heat transfer, combustion science, machine dynamics, and materials engineering. This handout is designed for 3rd Year undergraduate mechanical engineering students, particularly those studying engine technology and power conversion systems. It provides a comprehensive introduction to the fundamental principles, operating characteristics, thermodynamic cycles, and mechanical behavior of internal combustion engines. The course aims to develop the theoretical understanding and practical knowledge necessary for the analysis, design, operation, and maintenance of modern engines. The first chapter begins with an overview of internal combustion engines and their classification according to ignition method, fuel type, number of strokes, cooling system, and application. Particular attention is paid to the operating principles of spark-ignition (SI) and compression-ignition (CI) engines, which represent the two main categories used in the automotive and industrial sectors. Chapter 2 includes a detailed analysis of thermodynamic cycles, including the Beau-de-Rochas (Otto) cycle, the Diesel cycle, and the Sabatier cycle. These ideal cycles are analyzed to understand the energy transformation within the cylinder and to evaluate engine performance using parameters such as thermal efficiency, compression ratio, pressure, temperature, and heat transfer. The study also presents real engine cycles and compares them with theoretical models to highlight the practical limitations resulting from energy losses during combustion, friction, heat dissipation, and incomplete gas exchange processes. Chapter 3 details the actual operating cycle of diesel engines through the four basic stages: intake, compression, combustion and expansion, and exhaust. The chapter presents diagrams and key engine characteristics to help students understand engine behavior under various operating conditions. It emphasizes the relationship between theoretical analysis and practical engine performance. Chapter 4: Dynamics of Reciprocating Engines. This chapter examines the kinematic and dynamic analysis of the sliding crankshaft mechanism, connecting rod motion, balancing of rotating and reciprocating masses, and valve timing systems to understand vibration phenomena, mechanical stresses, and power transmission within the engine. These concepts are fundamental to improving engine durability, smooth operation, and efficiency. Chapter 5 addresses engine performance parameters, such as indicated power, braking capacity, torque, specific fuel consumption, volumetric efficiency, and thermal efficiency. Engine characteristics are analyzed under full and partial load operating conditions according to international standards. The impact of fuel properties, combustion quality, and ignition systems on engine operation is also presented. The objective of this handout is therefore to provide students with a solid scientific and technical foundation in internal combustion engines, and to prepare them for advanced studies and professional applications in automotive engineering, energy systems, manufacturing industries, and research fields related to thermal machinery and sustainable energy technologies. 2026-06-07T00:00:00Z http://dspace.univ-djelfa.dz:8080/xmlui/handle/112/8284 Structure of matter BENHARKAT, Zohra The Structure of Matter is a foundational science course exploring the physical universe build. The present document for the Structure of Matter module has been designed to meet the needs of first year License students, particularly those pursuing a first degree in Science and Technology (L1). Its primary focus is on providing comprehensive instruction in fundamental concepts of matter structure, a captivating of general chemistry. The curriculum for Common Core in Science and Technology students delineates this course into six distinct chapters and then focuses on the view of fundamental concepts, principal components of matter, radioactivity, electronic structure of an atom, periodic classification of the elements and chemical bonding. 2026-04-29T00:00:00Z http://dspace.univ-djelfa.dz:8080/xmlui/handle/112/8283 Heat Transfer FERRAH, Abdelkader Heat transfer is directly related to numerous problems in many engineering and scientific applications. It is perhaps the most important, as well as the most applied process, in refining, gas processing, and chemical and petrochemical plants. This course on heat transfer is intended for second-year students in process engineering, as well as anyone who needs to acquire a foundation in this discipline. It conforms to the official curriculum issued by the Ministry of Higher Education and Scientific Research. Through the various chapters, the reader will be introduced to the modes of heat transfer. They will thus be able to identify the mechanisms and calculate the quantities of thermal energy that migrate from one medium to another. 2026-04-29T00:00:00Z http://dspace.univ-djelfa.dz:8080/xmlui/handle/112/8275 Documentary research and dissertation design KOUADRI, Amar The master's program in mechanical engineering, as in any other discipline, concludes with the preparation and defense of a final cycle project. This final step before obtaining one's degree is of great importance in a student's education. It represents a particularly intense period in terms of workload as well as stress for those preparing their dissertation. The public defense is also a source of apprehension and anxiety for most students. It is therefore very important to be able to prepare one's dissertation methodically in order to succeed during this important period of student life. This course is addressed to Master's 2 students in mechanical engineering, in the energetics option, who are about to prepare their final cycle project. Indeed, all Master's 2 students are concerned and need to acquire a good methodology to properly prepare their final projects. The content of this course conforms to the official program issued by the Ministry of Higher Education and Scientific Research. Throughout the various chapters, the reader will be introduced to documentary research and will learn the steps, methodology, and techniques for writing and presenting a dissertation. In summary, this course is designed to help students prepare their dissertations from start to defense and to guide them in adopting the appropriate approach. It is worth noting that this course is also of great use to recent graduates entering professional life, as they will often be called upon to prepare projects and present them effectively, communicating in the best possible way in the workplace. 2026-06-01T00:00:00Z