DOI 10.36461/NP.2024.71.3.002
UDC 621.436

METHOD OF COLD RUNNING-IN OF AUTOMOTIVE TRACTOR ENGINES AND DEVICE FOR ITS REALIZATION
A.N. Morunkov, Candidate of Technical Sciences, Associate Professor; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
S.V. Timokhin, Doctor of Technical Sciences, Professor, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.;
Federal State Budgetary Educational Institution of Higher Education "Penza State Agrarian University"

When operating the machinery and tractor fleet of agricultural enter-prises, some of the most important tasks are minimising the downtime of vehicles and self-propelled agricultural machinery during operation, reducing the cost of their maintenance, restoration and repair. The means of propulsion of mobile agricultural machinery are usually automotive tractor engines. The technical reliability of both the power unit and the self-propelled machine as a whole depends on compliance with the technology of production, overhaul and ongoing repairs. The final stage of engine production or repair is technical running-in. At the same time, the cold running test of engines is the first stage of the running-in process of new or repaired engines, which is usually carried out on running-in and brake stands or driving stations, which have large dimensions and capacities, high cost and limited application in agricultural en-terprises and dealerships for the maintenance and repair of mobile agricultural ma-chinery. The mentioned disadvantages are eliminated by the development of technolo-gies for the brake-free cold start of automotive tractor engines with dynamic load, which are carried out directly on mobile agricultural machinery. In order to perform the stage of cold running-in of engines without removing them from the tractor ma-chinery, a method of cold running-in of automotive engines with the use of autono-mous driving devices is proposed, which are installed instead of standard electric starters and allow to perform cold running-in of engines directly on the automotive machinery. The parameters of the driving devices (power, rotation frequency) were theoretically substantiated, a prototype of the autonomous driving device was devel-oped, and its laboratory and production tests were carried out with the cold start mode of VAZ-21067 and ZMZ-409 engines.
Keywords: automotive tractor engine, running-in, autonomous drive device, high-frequency electric motor, frequency converter.

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