In this paper, the authors introduce the development of a computer-based internal combustion engine teaching tool for the undergraduate and professional training courses. The teaching tool simulates a SI (Spark Ignition) engine running in a testing facility. The physical and mathematical models, as well as the control strategies that govern the engine's operation are embedded within the tool. It works as a virtual engine, and at the same time it displays and explains the physics behind each working process of the engine using graphical and animation features. The teaching tool serves as an assistant for the instructor of the internal combustion engine course. It provides the students with a visual and interactive environment to learn the physical processes of the internal combustion engines faster and easier.