Application of vegetable oils (biofuels) as energy carriers for transport and stationary diesel engines, promotes preservation of resources of mineral raw material, reduction in toxicity of the fulfilled gases and reduction of danger of a hotbed effect. In job [1] the analysis of ecological-economic parameters of diesel engines with direct injection of fuel (DI-direct injection) and the divided chambers of combustion (II-indirect injection) is carried out.

       The greatest distribution of use of vegetable oils (rapseed, sunflower, soya, etc.) as biofuel has found in engines IDI and "estelbiezed" diesel engines [2]. In Russia and Ukraine researches are conducted according to an opportunity of application rapseed (sunflower) oils and their mixes with diesel fuel in engines DI, II and diesel engines with volumetric - film mixing [3, 4, 5]. Its inventor R.Dizel spoke about an opportunity of use of vegetable oils as fuel for engines with ignition from compression.

       Most in detail physical properties and a chemical compound of vegetable oils are described in the monography [6] in which it is marked, that at крекинге the fats, proceeding at atmospheric pressure and temperatures more 310-320оС not condensed flying products and a condensate turn out, thus last is offered to be used as motor fuel. In job [7] it is specified, that at definition of fractional structure rapseed oils there is its decomposition.
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