In this thesis the engine control unit of the Formula Student car was developed. Commercially available programable engine control units have been studied, their advantages and disadvantages were defined and a list of tasks and functions that an ECU must perform on a formula student car has been made. It was decided that a ECU with a 4-cylinder engine management capability will be designed even though a single cylinder engine is used on the current formula student car. In this way the system's complexity does not increase significantly, but it is possible to test the ECU on a readily available four-cylinder engine before the formula student car is finished. An analysis of all sensors and actuators used on the car was performed and the circuitry and components required for signal conditioning and actuator control were defined. SMD (surface mount device) components were used for all circuits which due to smaller dimensions, allow for greater component density and thus smaller dimensions of the printed circuit board. Another advantage is significantly higher resistance to mechanical vibrations, especially important for the one-cylinder engine currently used on the car. Electrical schematics were made in the Altium Designer software package and the accompanying components of the integrated circuits were selected according to manufacturer's recommendation or calculation. Before the final version was made, the main components were tested separately and an engine control unit was built on the prototyping board to test the microcontroller firmware. The STM32F4 microcontroller firmware was written in C++ programming language in Visual Micro using the stm32duino library. The ECU case was made by additive manufacturing selective laser sintering of the polymer, and the connection of the two housing parts was sealed with a rubber seal to ensure waterproofness. Finally, in Visual Basic, an application that communicates with the engine control unit via the USB port was made, which allows simple adjustments of injection, ignition and various other parameters in real-time and monitoring and logging of all the data to the PC. The prototype version of the system was tested on a four-cylinder engine from Honda Civic 1997.