Abstract A way to preserve the natural resources and lowering the pollution level is the improving of the thermal engine efficiency in order to reduce the fuel consumption. For this purpose, the authors propose a combined solution to improve the performances of the automotive engine. In order to improving the combustion efficiency, we tried to get a more close approach to ideal combustion cycle at constant volume, specific to the spark ignition engine, by developing an engine with sequentially variable compression ratio. Also, the theoretical and physical model developed allows the determination of a transversal new profile of the compression ring in order to obtain better lubrication conditions. By modifying the architecture of the compression ring the ware of friction is reduced, thereby increasing mechanical efficiency. Also, the paper present the results of an analysis concerning the main factors affecting the cam-follower contact conditions, emphasizing the lubrication regime influence on the wear of elements in contact. An original technical solution is proposed for the improvement of the lubrication regime, in order to avoid the starvation phenomenon. This theoretical and experimental study concerns the modification of some parameters of the internal combustion engine in various situations, aimed at optimizing a friendly environmental propulsion engine.
Optimized Automotive Spark Ignition Engine
1st ed. 2016
2015-11-26
14 pages
Article/Chapter (Book)
Electronic Resource
English
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