Abstract
The research conducted by the authors so far shows that powering diesel engine with the mixture of canola oil with n-hexane [C6H14] is a promising solution. It was stated that adding n-hexane to canola oil caused a positive change in physicochemical properties of canola oil. However, empirical tests proved that further works are necessary in order to adapt the fuel injection system of the engine. This article presents test results which aim at estimating the degree to which the alternation of the dynamic angle of fuel pumping start influences the parameters of the combustion process. The empirical tests were run at the stands of external exploitative characteristic. During the tests the high-frequency parameters, such as: the pressure in the cylinder, the pressure in the injection cord and the ascend of the injection needle were measured for three values the dynamic angle of pumping start, α = 14°, 17° and 20° crank angle. The received data allowed for estimating, among others, the parameters describing the combustion process: mean indicated pressure, maximum pressure of combustion, the speed of the pressure increase, the angle of the beginning of combustion and the angle of the occurrence of maximum pressure.
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