Driving Mechanisms (FSI-QHL)

Academic year 2018/2019
Supervisor: prof. Ing. Václav Píštěk, DrSc.  
Supervising institute: ÚADI all courses guaranted by this institute
Teaching language: Czech
Aims of the course unit:
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.
Learning outcomes and competences:
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.

Links to other subjects:
recommended co-requisite: Tractors [QT]
compulsory co-requisite: Dynamics of Vehicles [QDY]
compulsory co-requisite: Dynamics of Vehicles [QDY-A]
Course contents:
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.
Teaching methods and criteria:
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.
Controlled participation in lessons:
Attendance in seminars is obligatory, checked by a teacher. The way compensation of absence is solved individually with a course provider.
Type of course unit:
    Lecture  13 × 2 hrs. optionally                  
    Computer-assisted exercise  13 × 2 hrs. compulsory                  
Course curriculum:
    Lecture 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.
    Computer-assisted exercise 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.
Literature - recommended:
2. Píštěk, V.: Aplikovaná mechanika. Učební text FSI VUT v Brně.
The study programmes with the given course:
Programme Study form Branch Spec. Final classification   Course-unit credits     Obligation     Level     Year     Semester  
M2I-P full-time study M-ADI Automotive and Material Handling Engineering -- Cr,Ex 6 Compulsory-optional 2 1 W