• Motori SUS, Semester 1, position 1

The aims of the course are: Gaining basic theoretical and practical knowledge about physicality of real engine working processes. Making a complete spark ignition and diesel engine working cycle calculation. Analysis of engine working process integral working parameters and operating characteristics.

Merging a theoretical knowledge of thermodynamics and fluid mechanics, connecting and application on real object – internal combustion engine. Training for basic modeling and calculating of real engine working process, as well as acquiring fundamentals of engine designing. Mastering of engine working parameters and operating characteristics and of the influences of working process on operating, energetic and ecologic engine characteristics.

1. Analysis of thermodynamic ideal cycles. Engine real working cycle; fundamentals of cycle modeling. 2. Gas exchange process; gas flow through the channels and valves. Gas exchange in 4-stroke engines; valve timing; indicators of gas exchange process quality. Gas exchange in 2-stroke engines. Compression process. 3. Combustion in spark ignition engine; phases, influencing factors and process calculation. 4. Combustion in diesel engine; phases, influencing factors and process calculation. Diesel engine types according to the method of mixture formation. Expansion process. 5. Engine integral working parameters: indicating parameters, mechanical losses and effective parameters. Analysis of engine fuel consumption and specific effective work (mean effective pressure). Engine energetic balance. 6. Engine operating characteristics: speed and load characteristics, propeller and universal characteristics.

1. Analysis of thermodynamic ideal cycles; numerical examples of engine ideal thermodynamic cycles. 2. Gas exchange process in 4-stoke engines. Numerical examples: evaluation of gas exchange specific work, coefficient of residual gases and volumetric efficiency. Display of various gas exchange systems and types of 2-stroke engines. 3. Display of various spark ignition engines combustion chambers and their comparison. Display of various diesel engines combustion chambers and their comparison. 4. Instruction for engine working process calculation. Example of spark ignition engine working process calculation. Example of diesel engine working process calculation. Examination of student’s engine working process calculation report.

No prerequisites required.

1. M.C. Živković: Internal combustion engines Vol. 1: Theory of engines, Uni. of Belgrade, Faculty of Mechanical Engineering, ISBN 86-7083-073-6, 1988 2. M. Tomić, S. Petrović: Internal combustion engines, Uni. of Belgrade, Faculty of Mechanical Engineering, ISBN 978-86-7083-817-8 /in Serbian/, 2014 3. S. Popović: Engine working processes- handouts, available in PDF format at the Department of IC engines. 4. Test bench for internal combustion engines testing, Department of IC engines 5. Measuring-data acquisition system National Instruments PXI-1042-RT8186/5401/6123/6229/4070/6602/8461 (АРС) 6. National Instruments LabView 7.1 (РРО)

Total assigned hours: 75

New material: 20
Elaboration and examples (recapitulation): 10

Auditory exercises: 12
Laboratory exercises: 0
Calculation tasks: 6
Seminar paper: 0
Project: 12
Consultations: 0
Discussion/workshop: 0
Research study work: 0

Review and grading of calculation tasks: 2
Review and grading of lab reports: 0
Review and grading of seminar papers: 0
Review and grading of the project: 5
Test: 0
Test: 3
Final exam: 5

Activity during lectures: 0
Test/test: 15
Laboratory practice: 0
Calculation tasks: 15
Seminar paper: 0
Project: 30
Final exam: 40
Requirement for taking the exam (required number of points): 0

J. Heywood: Internal Combustion Engine Fundamentals, ISBN-13: 978-1260116106, McGraw Hill, 2018; R. Pischinger , M. Klell , T. Sams: Thermodynamik der Verbrennungskraftmaschine, ISBN: 978-3-211-99277-7, Springer Verlag, 2010; C. R. Ferguson: Internal Combustion Engines: Applied Thermosciences, J.Wiley & Sons, ISBN-13: 978-1-118-53331-4, 2016; R. Benson_Introduction to the Thermodynamics of Spark and Compression Ignition Engines_Vol1/2, Pergamon Press Ltd., ISBN: 0 08 022720 X/0 08 022720 1, 1979; M.C. Živković: Internal combustion engines Vol. 1: Theory of engines, Uni. of Belgrade, Faculty of Mechanical Engineering,, ISBN 86-7083-073-6, 1988