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A city bus LIAZ 5292XX is a result of teamwork of "RUSELPROM" Corp. and the "Likino Bus Works." By the results of the International Automobile Forum, Moscow, Russia, 2008 the bus has been recognized as the best bus of year in Russia. LIAZ 5292XX with hybrid power train provides the following values: bus length is 12 m; maximum (peak) traction power is about 250 kW; maximum speed 90 km/h; movement on 20% (12°) grade is possible. The bus carries ICE; electric traction IM; generator IM; buffer super capacitor. Parameters and block diagrams of the traction electric equipment set (TEES) of the city bus are presented in the article. The control algorithm of power flows which provides the main fuel economy is considered. Results of benchmark tests are given. The special software - Service Computing System visualizes parameters of TEES operating variables; presents and processes of the graphic information; loads, saves and views in graphic and table form the files of emergency logs.