The M-84 tank was built on the basis of the Russian T-72 tank, and its features are the use of the largest caliber cannon and effective ammunition, automatic cannon loading, low mass and silhouette, and good protection. It also has at its disposal a new modern fire control system, a modified engine with higher power, new radio equipment and an NBK detector. Although it is based on the Russian T-72 tank, it retains its basic features, but represents an evolution of the base tank in systems and features. The M-84 tank has a twelve-cylinder diesel engine. Diesel engines are widely used as propulsion engines. They are installed in various means of transport, but they are mostly used in trucks. In order to achieve the most efficient operation of the engine, it is necessary to have an injection system that can achieve high pressures, thereby increasing the efficiency of the engine. Higher pressures reduce the impurities in the fuel and at the same time the fuel particles are smaller, so the fuel mixes better with the air. The V-46-6 engine has a high-pressure fuel supply system. The main parts are: high-pressure pump, injectors, pipelines, etc. The injection system is direct and provides the engine with a power of 575 kW.