Abstract

One of demands for modern designed 1C engines is low fuel and lubricant consumption because of reasons concerning ecology as well as energy and economy. The symptom is that conventional 1C engines will be the first choice as a power source for numerous applications in the future. Therefore many changes and improvements in design need to be done for further decrease of fuel consumption followed by the decrease of exhaust emission. First of all, there is the optimization of the working cycle, the application of variable compression, the application of variable valve control, better couplina with gas machines, etc. Significant potential for efficiency improvement of 1C engines is in reducing mechanical losses. Mechanical losses in 1C engines are caused mostly by friction between the mobile parts of the engine (piston-cylinder assembly). Therefore, continual attention to the research process of studying friction problems would be necessary.

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