Abstract: A control system for pre-start heating of a diesel engine that doesn’t consume additional energy has been developed in the Bashkir State Agrarian University, located in Ufa, the Russian Federation. It is a heat accumulator with a phase change matter provided with a controlled auxiliary drive to circulate coolant and a heat sensor. Its work is based on storage of heat energy in the accumulator during engine operation, energy reservation when the engine is being off and there is a phase transition “Fusion-crystallization” and using it in pre-start heating of the engine. It considerably increases operation efficiency of a diesel engine in cars and tractors. Sodium acetate trihydrate having the highest specific fusion heat and satisfying safety requirements was used as a heat-retaining material in the heat accumulator. There is a mathematical model for heat accumulator discharge that helps to calculate dependence of the required engine temperature on the temperature in the heat accumulator and determine its necessary parameters. A change in engine temperature during heat accumulator discharge is found to be non-linear. The results of experimental studies showed high efficiency of the diesel pre-start heating control system. The period for engine heating-up to the running temperature has shortened by 5, 3 min and fuel consumption has decreased by 26%.
Fanil Gabdrafikov, Ural Galiakberov, Elmir Gaysin, Marsel Abrarov and Vadim Gindullin, 2018. Control System for Pre-Start Heating of a Diesel Engine. Journal of Engineering and Applied Sciences, 13: 8836-8842.