Course detail

# Driving Mechanisms

Objective of the Drive Mechanisms course is to acquaint students with basic concepts and layout of propulsion systems of passenger and utility vehicles with conventional as well as hybrid and electric drives. Mechanisms of combustion engines. Kinematics and dynamics of the drive mechanisms. Internal and external forces of combustion engines. Engine torque, harmonic analysis. Forces affecting the bearings of a piston machine. Balancing of inertia forces and of line engine torque, use of balancing shafts. Dynamics of V-engines and engines with unconventional power train arrangement. Irregularity of combustion engine running, design of flywheel. Cam mechanisms. Hybrid and electric drive of vehicles.

Learning outcomes of the course unit

The subject Driving Mechanisms enables students to learn of vehicle driving mechanisms arrangement and computational models for determination the course of internal and external forces and torque, optimal driving mechanism configuration design of in-line, V- and non-conventional arrangement engines together with engine revolution non-uniformity analysis and vibration of powertrains.

Prerequisites

Matrix calculus, differential and integral calculus, differential equations. Technical mechanics, kinematics, dynamics, elasticity and strength. Fourier analysis.

Co-requisites

Not applicable.

Recommended optional programme components

Not applicable.

Not applicable.

Planned learning activities and teaching methods

The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures.

Assesment methods and criteria linked to learning outcomes

Requirements for Course-unit credit award:
The orientation within problems discussed and the ability of solving them, examined by working-out assigned tasks without significant mistakes. Continuous study checking is carried out together with given tasks verification.
Examination:
The exam verifies and evaluates the knowledge of physical fundamentals of presented problems, theirs mathematical description on a presented level and application to solved tasks. The exam consists of a written part (test) and if necessary an oral part.

Final evaluation consists of:
1. Evaluation of the work on seminars (elaborated tasks).
2. Result of the writing part of the exam (test).
3. The result of the oral exam if necessary.

Language of instruction

Czech

Work placements

Not applicable.

Aims

Learning outcomes of the course Driving Mechanisms is to acquaint students with current concepts of propulsion systems with combustion engines as well as with hybrid and electric drives and computational models for determining dynamic force and torque effects in this systems. These computational models are the primary tool for choosing the optimal driveline design and construction of modern passenger and commercial vehicles.

Specification of controlled education, way of implementation and compensation for absences

Attendance in seminars is obligatory, checked by a teacher. The way compensation of absence is solved individually with a course provider.

Classification of course in study plans

• Programme M2I-P Master's

branch M-ADI , 1. year of study, winter semester, 6 credits, compulsory-optional

#### Type of course unit

Lecture

26 hours, optionally

Teacher / Lecturer

Syllabus

1. Mechanisms of internal combustion engines and their computational models. Kinematics of the centric crank mechanism.
2. Kinematics of the eccentric crank mechanism, mechanisms with side rods.
3. The dynamics of the crank mechanism, computational models, internal and external forces.
4. Torque of the combustion engine, harmonics orders, revolution irregularity, flywheel.
5. Balancing of inertia forces and moments in the crank mechanism, balancing units.
6. Dynamics of the piston engines with a small number of cylinders.
7. Dynamics of the in-line piston engines.
8. Dynamics of the crank mechanism of V-engines.
9. Unconventional arrangement of drivetrains, V-engines with offset rod pins and VR-engines.
10. Cam mechanisms of internal combustion engines, kinematics and dynamics of cam mechanisms.
11. Dynamics of drivelines with with internal combustion engines, dual mass flywheel.
12. Driveline dynamics with hybrid drives, active vibration damping.
13. Drivelines of vehicles with electric drives.

Computer-assisted exercise

26 hours, compulsory

Teacher / Lecturer

Syllabus

01. Efffective engineering computational tools, computational technology.
02. Computational tools in the branch, computational Matlab software.
03. Matlab utilization, data file handling, data visualization.
04. Centric crank mechanism, waveforms of kinematic quantities.
05. Kinematic quantities of eccentric crank mechanism.
06. Engine p-alfa diagram, p-V diagram, engine torque.
07. Forces on piston pin, the forces course transferred by connecting rod.
08. The course of radial and tangential forces, torque of individual cylinder.
09. Numerical Fourier analysis of engine torque, harmonic orders.
10. Polar load diagrams of combustion engine bearings.
11. Torque courses on cranks of multi-cylinder in-line engines.
12. Course of kinematic quantities of engine cam mechanisms.
13. Dynamic model of a vehicle torsional drive system, its natural frequencies and modes of vibration.

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