TY JOUR TI Evaluation of Diesel Locomotive Performance Using Controlled Valves KW Controlled gas distribution drives KW efficiency KW valve timing KW gas distribution phases KW diesel KW valve JO Proceedings of Petersburg Transport University AU Hamidov, O.R. AU Kulmanov, B.T. PY 2023 IS 20 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"