Assessment of increased energy efficiency of vehicles with a rational reduction of engine capacity

Problem. The tendency to reduce the working volume of internal combustion engines, which has emerged in recent years global automotive industry, is due need improve environmental situation and energy efficiency road transport. Goal. aim study increase vehicles by rationally reducing maximum effective engine capacity. Methodology. work uses method partial accelerations, implemented a mobile registration measurement complex, allowed authors obtain an improved formula for calculating force aerodynamic resistance. Experimental studies car aerodynamics were also carried out. Results. article presents results authors' research, made it possible prove possibility power while maintaining specified speed level indicators dynamic properties cars. Originality. relationship between degree use relative change specific fuel consumption carburetor gasoline with direct injection diesel determined. Practical value. Calculations performed on example ZAZ-1103 "Slavuta" showed that rational reduction allows 9.5% consumption, this leads 6.7 % 20.3%, respectively.