Woytjuk S. Improvement of economic and ecological indices of petrol engine, in which power capacity is controled by means of swiching-off of working cycles at idling.

The thesis is devoted to investigation of economic, ecological and dynamic indices of PСE at idling. The PСE is engine, in which power capacity is controled by means of swiching-off of working cycles. The mathematical models of working process and dynamics of PСE where improved. It enabled to correct requirements for the fuel equipment (injection system). The algorithm of working cycles displacement at cylinders of the engine where developed and investigated. The economical, ecological and dynamic parameters of PСE where determined. The process of combustion in PСE was investigated and the basic thermodynamic parameters of a working process cycle which follows after one, two, three and four successively missed cycles where determined too. Theoretical researches where performed on personal. Original technique was developed for engineless and motor bench tests. Theoretical and experimental bench research for this method has been carried out on 8-cylinder petrol engines with spark ignition. The research results indicate the following: the fuel economy of engine has improved by 25 % at part load and by 44 % at idle. The exhaust emissions have been reduced 1.5 to 2 fold.