Improving the fuel efficiency of an agricultural tractor diesel engine Anzor Bolotokov, Husen Gubzhokov, Khachim Ashabokov, Irina Troyanovskaya, Sergey Voinash, Ramil Zagidullin and Linar Sabitov E3S Web Conf., 411 (2023) 01045 Published online: 10 August 2023 DOI: 10.1051/e3sconf/202341101045