TY JOUR TI OPTIMIZATION OF METHODS AND PARAMETERS OF PRE-START THERMAL PREPARATION OF THE ENGINE FOR STARTING DEPENDING ON THE AMBIENT TEMPERATURE KW the process of starting the tractor engine KW heat accumulator KW pre-start preparation KW compression KW fuel-air mixture JO Vestnik of Kazan State Agrarian University AU Potapov, E.A. AU Vahrameev, D.A. AU Sinickiy, S.A. AU Medvedev, V.M. AU Terentyev, A.G. PY 2022 IS 16 PB Kazan state agrarian University