Crank mechanism of in-line four-cylinder spark ignition engine

Objective of this bachelor’s thesis is for given geometric, thermodynamic and operation parameters cylindrical unit of in-line four-cylinder spark ignition engine perform calculation of thermodynamic cycle, project basic proportion of piston group and for given operation modes perform strength check of connecting-rod eye. In the introduction is described ordinary use of spark ignition engines, several details of history of their evolution and present most widly used construction. Major text of bachelor’s thesis attend to four main chapters: description of thermodynamic cycle, calculation of forces reacting to piston, strength calculation and check of piston pin and of connecting-rod eye. Supplement consists of accomplishment of these calculations and a few of graphs. In the conclusion is evaluation of performed calculations and there are mentioned technological directions of present evolution of gas-engine