The technology of preparation and supply of complex fuel is proposed to improve the operational and technical characteristics of diesel engines of automotive equipment, as well as technical means for its implementation. The analysis of the work of the ATT samples showed that its operation occurs with low speeds in the field and heavy loads on the internal combustion engine (ICE), while its thermal tension increases and the combustion process worsens in the combustion chamber, leading to the formation of carbon deposits. To solve this problem, a method and technical means are proposed for cleaning engine parts from the formed carbon deposits without parsing it during daily operation in order to improve the operational and technical characteristics of equipment, on which the readiness of samples of the machine and tractor fleet will directly depend. The developed method is based on direct mixing of fuel with water, dispersion of the resulting mixture and feeding into the combustion chamber of the internal combustion engine when the fuel temperature exceeds a given value, and depending on the temperature, as well as the number of revolutions of the internal combustion engine and from different levels of the mixing tank. The versatility of the developed devices for the implementation of the proposed method is that they can be used not only in stationary conditions, but also on board the equipment during its operation. The implementation of the developed method and technical devices will ensure effective removal of carbon deposits due to the interaction of red-hot carbon particles with water droplets (steam), which will lead to an increase in the resource of diesel internal combustion engines, restoration of operational and technical characteristics of especially worn-out diesel internal combustion engines and ultimately increase the readiness of individual samples of ATT and, in general, the technical readiness of the machine and tractor fleet.