Course detail

Tractors

FSI-QTAcad. year: 2024/2025

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.

Language of instruction

Czech

Number of ECTS credits

6

Mode of study

Not applicable.

Guarantor

prof. Ing. František Bauer, CSc.

Department

Institute of Automotive Engineering (ÚADI)

Entry knowledge

Basic knowledge of internal combustion engines and vehicle dynamics.

Rules for evaluation and completion of the course

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.


Attendance in seminars is obligatory, checked by teacher. The way of implementation and compensation of absence is solved individually with subject guarantor.

Aims

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.


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.

Study aids

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

BAUER, František, Pavel SEDLÁK a Tomáš ŠMERDA. Traktory. 1. V Brně: Mendelova zemědělská a lesnická univerzita, 2006. ISBN 80-867-2615-0. (CS)
Reinius,K.T.: Traktoren-Technik und ihre Anwendung.
Sanjay Kumar: A Text Book of Tractor at a Glance, Vydavatel: International Book Distributing Company, 510 str., rok vydání 2007, ISBN: 9788181891853
Semetko,J. a kolektiv: Mobilní energetické prostředky 2 (Mechanizmy vozidel).
Semetko,J. a kolektiv: Mobilní energetické prostředky 3 (Traktory a automobily).
Wong , J.Y.: Terramechanics and Off-Road Vehicle Engineering. Elsevier 2009. pp.488. ISBN: 978-0-7506-8561-0

Recommended reading

BAUER, František, Pavel SEDLÁK a Tomáš ŠMERDA. Traktory. 1. V Brně: Mendelova zemědělská a lesnická univerzita, 2006. ISBN 80-867-2615-0. (CS)
OBŮRKA, Stanislav. Traktory. Brno: Ediční středisko VUT, 1990, 155 s. : obr., tab., grafy. ISBN 80-214-0081-1. (CS)
Sanjay Kumar: A Text Book of Tractor at a Glance, Vydavatel: International Book Distributing Company, 510 str., rok vydání 2007, ISBN: 9788181891853 (EN)
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. (EN)

Classification of course in study plans

  • Programme N-ADI-P Master's 2 year of study, summer semester, compulsory-optional

  • Programme C-AKR-P Lifelong learning

    specialization CLS , 1 year of study, summer semester, elective

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

prof. Ing. František Bauer, CSc.

Syllabus

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

14 hod., compulsory

Teacher / Lecturer

prof. Ing. František Bauer, CSc.

Syllabus

  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

12 hod., compulsory

Teacher / Lecturer

prof. Ing. František Bauer, CSc.

Syllabus

  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.