MULTIFUNCTIONAL DIAGNOSTIC COMPLEX TO ASSESS THE TECHNICAL CONDITION OF MOTOR-AND-TRACTOR VEHICLES

The research findings on the development of technological equipment for the prevention of engine failures of motor-and-tractor vehicles are discussed. During routine maintenance, it is necessary to monitor the condition of the elements of these systems and, if required, eliminate the damage that occurred. Electronic control units of a passenger car diesel engine powered by an on-board 12V network were used to conduct research: ECU EDC16C34 and SID206. The engine control unit has a 32-bit bit rate, and there is also an “anti-tuning” algorithm. The ECU has an increased amount of internal flash memory up to 4MB. The limits of the measured values are as follows: fuel pressure - up to 1800 bar; air pressure up to 3 bar; rotation speed up to 8000 rpm; temperature from -40 to 600°C, and on different measurement channels, the angle of position (EGR valve flaps, throttle, accelerator pedal) 0-360 degrees. The analysis of the software for working with this adapter was carried out. Based on tests and practices, FORScan, OpenDiag and Car Scanner ELM OBD2 software applications were selected. The results of the conducted operational studies of the gasoline and diesel engines of a truck operated under the conditions of the agro-industrial complex made it possible to obtain reliable engine operation parameters: inlet pressure under various conditions, boost air pressure, and the temperatures of fuel, coolant, oil, and others.