Course detail

Driving Mechanisms

FSI-QHLAcad. year: 2018/2019

The course makes the students familiar with rudimentary concepts and arrangements of combustion engine power trains; highlighting especially piston machines. Mechanisms of combustion engines. Kinematics and dynamics of the crank mechanism. 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. Powertrain vibrations.

Learning outcomes of the course unit

The subject Driving Mechanisms enables students to learn of ICE 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. 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.

Recommended or required reading

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 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. Result of the oral part of the exam.

Language of instruction

Czech

Work placements

Not applicable.

Aims

The objective of the course Driving Mechanisms is to make students familiar with the state-of-the-art internal combustion engines (ICE) driving mechanisms and computational models for internal and external forces determination, multi-cylinder piston machines optimal balancing and revolution non-uniformity design. These computational models represent an initial tool for ICE optimal conception and construction design.

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. 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. Balancing of the in-line piston engines I
7. Balancing of the in-line piston engines II.
8. Balancing of the crank mechanism of V-engines.
9. Unconventional arrangement of drivetrains, V-engines with offset crank pins and VR-engines.
10. Torsional vibration of crank mechanisms, natural frequency.
11. Forced oscillation of crank mechanisms, energy calculation methods.
12. Cam mechanisms of internal combustion engines, kinematics of cam mechanisms.
13. Dynamics of cam mechanisms, computational models.

seminars in computer labs

26 hours, compulsory

Teacher / Lecturer

Syllabus

1. Efffective engineering computational tools, computational technology.
2. Computational tools in the branch, computational software Mathcad.
3. Mathcad utilization, data file handling, force load calculations.
4. Crank mechanism kinematics. Piston track determination.
5. Crank mechanism kinematics. Piston velocity and acceleration.
6. Engine p-alfa diagram, p-V diagramu construction.
7. Primary and secondary forces on the piston course, lateral force course.
8. Forces on piston pin, the forces course transferred by connecting rod.
9. The course of radial and tangential forces, torque of individual cylinder.
10. Connecting rod bottom-end bearing load polar diagram.
11. Torque course on crank throws of multi-cylinder in-line engine.
12. Torque course on crankshaft journals of in-line engine.
13. Torque course on crank (bottom-end) pins of in-line engine.