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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Variable compression ratio for spark-ignition four-cylinder engine
 Rada, Jan ; Fridrichová, Kateřina (referee) ; Drápal, Lubomír (advisor)
The automotive industry faces pressure to increase engine efficiency and reduce emissions. One promising solution is the implementation of variable compression ratio technology, which allows for the dynamic adjustment of the engine's compression ratio according to operating conditions, thereby improving efficiency, saving fuel, and reducing emissions. This thesis focuses on the analysis and design of a four-cylinder spark-ignition engine with variable compression ratio technology. The work compares the baseline engine with the modified engine in terms of installation space and weight, incorporating theoretical foundations of variable compression ratio and practical aspects of its implementation. The introductory part includes a literature review on variable compression ratio engines, followed by the conceptual design of the engine and an analysis of the crank mechanism. The main part of the thesis is the design, which aims to maximize the use of components from the original engine. The resulting kinematic and force analyses support the potential of this technology for developing more efficient engines.
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