Comparative study of working processes in atmospheric and turbocharged diesel engine of 4Ch 11/12.5 type at the maximum torque mode when using biodites from oxy derivatives of sunflower oil

Abstract

One of the promising options of biofuel especially for mobile machinery in agriculture are biodites - mixtures of vegetable oils with mineral diesel fuel of different composition. Diesel engines of 4Ch 11/12.5 type in their atmospheric version (D-243.1) and turbocharged version (D-245.1) are widely used in mobile machines used in agriculture in Russia. They are installed on all wheeled tractors of traction class 1.4 produced by the OOO MTZ, and their modification D-245.12C2 has been successfully used for many years to replace gasoline engines in GAZ and ZIL trucks, and PAZ buses. Previously, the authors have already proposed to use in the composition of biodites instead of pure sunflower oil its oxy derivatives - derivatives obtained by oxidation of unsaturated bonds in the Wagner reaction, conducted theoretical studies and showed that the internal combustion engine with this fuel increases the effective power and torque when operating at maximum power, but reduces the economy. This study deals with the operation of atmospheric D-243 and turbocharged diesel engine D-245 with the proposed alternative biofuels on the maximum torque mode. It is shown that when using verified computer models D-243.1 and D-245.2 for modeling of the working process by indices (M_e, b_e) in the investigated mode of maximum torque, the error did not exceed 7.0%. When using oxy derivatives of sunflower oil in the composition of bidets with mineral fuel, in maximum torque mode, the parameters M_e, N_e increase up to 4.0...13.2%, however at the same time, the consumption of alternative biofuel b_e increases up to 13.2...27.1%.