📗 This book contains four main chapters. The first chapter is an introduction to the design of internal combustion engine laboratories and some important notes about the measurements and their scientific reports. The second chapter is a literature review on the whole types of internal combustion engines and their principle of operation. The third chapter is the lab design, which describe the lab design procedure and its test beds. The final fourth chapter is the summary and recommendations for the work. Also, this book contains a list of references contains the references used in the work after the four chapters.