Tractors (FSI-QT)

Academic year 2023/2024
Supervisor: prof. Ing. František Bauer, CSc.  
Supervising institute: ÚADI all courses guaranted by this institute
Teaching language: Czech
Aims of the course unit:

The aim of the course is to acquaint students with the utility characteristics of tractors and with the possibilities of achieving the maximum possible efficiency of engine power transfer to tractor power. The objective is to understand the relationship between the technical possibilities of tractors and the possibilities of terramechanics with axle load limits.
Learning outcomes and competences:

The course enables students to gain an overview of the current state of tractor design, in particular the functional transmission nodes
driving forces that are sorted under load, knowledge of hydrostatic
drives, control hydraulics, special linkages and other tractor operating equipment. This knowledge will enable more responsible
decision making on the selection, deployment and use of tractors in operation.
Prerequisites:

Basic knowledge of internal combustion engines and vehicle dynamics.

Links to other subjects:
compulsory co-requisite: Driving Mechanisms [QHL]
Course contents:
The subject introduces the construction of various functional tractor groups. The emphasis is laid upon the motional mechanics, the interaction with the field, the traction characteristics and the adhesion load of driving wheels as related to the limit load of the substrate. The subject evaluates various systems of transmitting the drive force of the tractor from the viewpoint of achieved efficiency and traction power, while showing the opportunities to increase the traction efficiency by way of the regulation hydraulics of a tractor.
Teaching methods and criteria:
The course is taught through lectures explaining the basic principles and theory of the discipline. Teaching is suplemented by practical laboratory work.
Assesment methods and criteria linked to learning outcomes:

Conditions for credit: active participation in the exercises. Obtaining a minimum of 10 points (out of 30 possible) on the examination papers, the deadline for which is set at the beginning of the semester. Completion of field measurements and measurements on the test track.
The examination is written and oral. The results of the control works in the exercises and the student's knowledge in the examination are included in the classification assessment.
Controlled participation in lessons:
Attendance in seminars is obligatory, checked by teacher. The way of implementation and compensation of absence is solved individually with subject guarantor.
Type of course unit:
    Lecture  13 × 2 hrs. optionally                  
    Laboratory exercise  7 × 2 hrs. compulsory                  
    Exercise  6 × 2 hrs. compulsory                  
Course curriculum:
    Lecture 1. Driving gearand power transmission.
2. Driving gear auxiliary drive shaft.
3. Hydrostatic gears of tractors.
4. Exploitation equipment of tractors.
5. Forces influencing tractors with attached implement.
6. Forces influencing tractors four-wheel tractor.
7. Forces influencing caterpillar tractors.
8. Rolling resistance, drving force, slippage,
9. Output balance.
10. Adhesion and pulling efficiency.
11. Puling characteristics.
12. Tractors kit.
13. Performance of tractor aggregations.
    Laboratory exercise

  1. Practical measurement of gearboxes, saw diagram.

  2. Practical measurement of three-point linkage control systems.

  3. Power balance, power transmission by thrust and PTO.

  4. Measurements on cylinder dynamometers.

  5. Adhesion and tensile efficiency, traction and braking characteristics.

  6. Tensile characteristics.
    Exercise

  1. Driveline transmission device.

  2. Multipliers, gearboxes and PTO drives.

  3. Tractor explosion equipment and control hydraulics.

  4. Forces acting on the tractor with implements.

  5. Tractor with all-wheel drive.

  6. Power balance, power transmission by tractor and camshaft.
Literature - fundamental:
1. Wong , J.Y.: Terramechanics and Off-Road Vehicle Engineering. Elsevier 2009. pp.488. ISBN: 978-0-7506-8561-0
2. Sanjay Kumar: A Text Book of Tractor at a Glance, Vydavatel: International Book Distributing Company, 510 str., rok vydání 2007, ISBN: 9788181891853
3. Reinius,K.T.: Traktoren-Technik und ihre Anwendung.
4. BAUER, František, Pavel SEDLÁK a Tomáš ŠMERDA. Traktory. 1. V Brně: Mendelova zemědělská a lesnická univerzita, 2006. ISBN 80-867-2615-0.
5. Semetko,J. a kolektiv: Mobilní energetické prostředky 2 (Mechanizmy vozidel).
6. Semetko,J. a kolektiv: Mobilní energetické prostředky 3 (Traktory a automobily).
Literature - recommended:
1. WONG, J. Y. Terramechanics and off-road vehicle engineering: Terrain behavior, off-road vehicle performance and design. Second edition. Kidlington, Oxford: Elsevier/BH, 2010. ISBN 978-0-7506-8561-0.
2. Sanjay Kumar: A Text Book of Tractor at a Glance, Vydavatel: International Book Distributing Company, 510 str., rok vydání 2007, ISBN: 9788181891853
3. BAUER, František, Pavel SEDLÁK a Tomáš ŠMERDA. Traktory. 1. V Brně: Mendelova zemědělská a lesnická univerzita, 2006. ISBN 80-867-2615-0.
4. OBŮRKA, Stanislav. Traktory. Brno: Ediční středisko VUT, 1990, 155 s. : obr., tab., grafy. ISBN 80-214-0081-1.
The study programmes with the given course:
Programme Study form Branch Spec. Final classification   Course-unit credits     Obligation     Level     Year     Semester  
N-ADI-P full-time study --- no specialisation -- Cr,Ex 6 Compulsory-optional 2 2 S