More strict rates of the emissions of harmful substances with burnt gases of the diesels as well as the restriction of carbon dioxide emission makes the majority of countries look for the lessening of the engine effect danger on environment. The use of the alternative fuels of vegetable origin permits to reduce considerably by 25-50 % the content of toxic components (CO, CnHm, SO2, SO3, PM) and to lessen the action of greenhouse effect at the expense of the reduction CO2 in burnt gases and its circulation in nature.