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The feature of offered algorithm is that it allows, without record and analysis of the display diagram, to estimate a running cycle of a diesel engine parameters which characterize ecological and economic performances. The mathematical model described in report allows to determine connection of coefficient of filling, pressure and temperature of air boost, factor of excess of air with effectiveness ratio of combustion and contents of soot in exhaust gas and to take into account this connection at a choice initial data for control fuel feed or for elaboration of diesel engine dynamic model. The algorithm incorporated, for example, in the microcontroller of an electronic fuel feed controller allows analyzing the sensors data and theoretically determine of smoke amount in the exhaust gases for chosen cycle of fuel feed. The restriction of smoke is possible by criterion dD/dGT, where D - contents of soot in exhaust gas and GT - fuel cycle submission under the program-adaptive schema.

It has become more urgent to use alternative fuels in diesels with growth of the world prices on petroleum and reduction of petroleum stocks. It is also important the reduction of emissions of carbonic gas concerning to group of “greenhouse gases”. Therefore, the vegetable raw material fuels represent the interest to use in a diesel. One of the most perspective alternative bio-fuels is the colza-oil. A number of problems are arising at work of diesel on the colza oil. The problems are eliminated by using mixes of colza-oil with diesel fuel. However, these mixes have increased density, viscosity, and superficial tension in comparison with standard diesel fuel. It results in deterioration of the fuel spray and mix-creation. It is offered the design of an injector, ensuring improvement of fuel spray and mix-creation in a highspeed diesel engine working on mixes of diesel fuel with colza oil. The researches of the offered injectors are carried out at a four cylinder diesel engine.