Review article

Taking into account the development of fire extinguishing technologies and the design of fire-fighting vehicles, there has been improved the method of technical diagnostics of the serviceability of diesel engines of fire-fighting vehicles under operating conditions. The method is based on the use of a device for changing the engine speed mode in the «free acceleration» mode without an external load, controlled by an original program, and is characterized by increasing the accuracy of reproducing the time interval of action on the accelerator pedal when measuring exhaust gas opacity due to uniform and smooth movement of the pedal with the required intensity. The method was tested on the YAMZ-53623 AC-6.0 40 (5557) engine. There have been proposed algorithms for applying the methodology when diagnosing the structural safety (serviceability) of diesel engines of fire trucks in repair and technical centers of the Russian Ministry of Emergency Situations based on smoke levels and concentration values of harmful (pollutant) substances in exhaust gases.