• Semester 5, position 4

Aims of this course are offering of overall insight in problems of vehicle dynamics, firstly in specific items of wheel – surface contact. This course is intended for the students of Motor Vehicle Module, and represent an introduction for the further exploration of theory of vehicle dynamics. Students are also getting knowledge about incorporating of engine, transmission and driving characteristics into one unit, which is the base for all future activities within the Module.

After successful completition of this course, students should be trained to: - List, define and explain forces acting on a vehicle in motion; - Explain and analyze force distribution in tyre–surface contact; - Analyze characteristic parameters needed to determine grip, friction, sliding and rolling resistance; - Discuss and give graphic interpretation of tractive force diagram of the vehicle for defined conditions; - Explain the influence of transmission parameters on vehicle performance; - Select transmission elements corresponded to engine performance and road conditions; - Apply tractive force analysis on transport vehicles and machinery; - Analyze and explain the consequences of all-wheel drive powertrain related to power circulation.

Basic terms – vehicle as dynamic system; forces, momentums, reactive forces; wheel and surface characteristics; forces acting on vehicle – static and dynamic reactive forces – vertical, tractive and side forces; maximum performances – speed, acceleration and slope; engine – characteristics of engines, diagram, transferring of engine characteristics from engine to wheels; equation of movement; dynamic characteristics of passenger, freight and working vehicles – drag diagram, power characteristics, power balance, gear ratios, theoretical and real speed of work vehicles, slip coefficient; Vehicle braking; Fuel consumption characteristics.

Practical lessons are made through public exercise, as preparation for individual students' projects and through practicing some calculations related to all matters studied already in theoretical part. Also, there are autonomous activities of students in calculations within specific areas of course, as well as creation of individual papers, that represent implementation of achieved knowledge for making a dynamic characteristics of vehicles. There is possibility for consultation with teachers, which is preparation for tests and final exam.

No special requirements.

1. D.Jankovic, J. Todorovic, G. Ivanovic, B. Rakicevic: Theory of Vehicle Motion, Faculty of Mechanical Engineering, Belgrade, 2001. 2. D. Jankovic: Solved Problems from Motor Vehicles, Faculty of Mechanical Engineering, Belgrade, 1991. 3. D. Jankovic: Instructions for Dynamic Calculation of Motor Vehicles, Faculty of Mechanical Engineering, Belgrade, 1992.

Total assigned hours: 75

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

Auditory exercises: 4
Laboratory exercises: 0
Calculation tasks: 21
Seminar paper: 0
Project: 5
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: 3
Test: 5
Test: 0
Final exam: 5

Activity during lectures: 10
Test/test: 20
Laboratory practice: 0
Calculation tasks: 20
Seminar paper: 20
Project: 0
Final exam: 30
Requirement for taking the exam (required number of points): 36

Thomas D. Gillespie: Fundamentals of Vehicle Dynamics, SAE, 1992.; Reza N. Jazar: Vehicle Dynamics: Thaory and Applications, Springer, 2008.; Dean Karnopp: Vehicle Stability, Marcel Dakker, 2004.