Conversion of diesel locomotive engines to operation on natural gas motor fuel Vitaliy Asabin, Alexey Roslyakov, Leyla Kurmanova, Sergey Petukhov and Maxim Erzamayev E3S Web Conf., 157 (2020) 01003 Published online: 20 March 2020 DOI: 10.1051/e3sconf/202015701003