Power Boost Limitations of the Gasoline Turbocharged Engine

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Pourzal, Mohammad Amir | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 45424 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Hajilouy Benisi, Ali; Mozafari, Ali Asghar
Abstract:
Nowadays internal combustion engines play an important role in the power generation as well as transportation fields all over the world. By using the turbocharger in internal combustion engine, more power is obtained in compare with aspirated engine having the same size, which is limited for gasoline engines. In this research, by a three-zone computer simulation code and experimental tests, the power boost limitations of the gasoline turbocharged engine are investigated. The results of single cylinder aspirated gasoline engine tests are used for validation the natural aspirated part of the code. For validating the turbocharged engine simulation, the results of a four cylinders gasoline engine tests are used. After validation of the simulation code, by changing the input parameters, the engine operation conditions are changed and its performance are predicted. This study shows that knock occurance is the main limitation for engine boost pressure increase. This research shows that inlet pressure ratio of the Audi gasoline turbocharged engine can be increased up to 1.4 without knock phenomena occurrance
Keywords:
Constraints ; Performance Curve ; Stamping ; Computer Simulation ; Turbocharge Gasoline Engine

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