Investigation of operating process of automotive diesel engines of the Minsk Motor Plant in maximum power mode using alternative biofuel

Abstract

Mixtures of vegetable oils with petroleum diesel fuel - biodites - are promising variants of biofuel for diesel internal combustion engines. For their production, besides rapeseed oil, other vegetable oils (soybean, sunflower, linseed, castor, etc.) can be used depending on their availability and cost in different countries and regions, and also oil transesterification is not required. However, widespread use of biodites is limited by the difference of the chemmotological indices of vegetable oils and petroleum diesel fuel. To obtain alternative biofuels, the authors proposed chemical modification of sunflower oil by its oxidation in the Wagner reaction (1...3% KMnO₄ solution, pH = 7...8). In this case, the corresponding oxoderivatives are formed which have low combustion values, therefore their use as an alternative biofuel in diesel is an open issue. Through computer generated simulation the operating processes in diesel engines D-243, D-245, D-260 and their modifications in the maximum power mode fueled by oxoderivatives of sunflower oil and their mixtures with petroleum diesel fuel were investigated. It was found that the effective power (N_e) of the atmospheric engine D-243 increased by 4.5...13.4%, and turbocharged D-245 and D-260 - by 6.9...8.2%. Symbatically, the effective torque (M_e) increased by 6.9…12.8%.