Course detail
Tractors
FSI-QT Acad. year: 2019/2020 Summer semester
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
5
Supervisor
Department
Learning outcomes of the course unit
This course presents a survey of the current situation in the tractor design.
Prerequisites
Design of machine parts, kinematics and dynamics of machine mechanism, evaluation of these elements from the viewpoint of mechanics, elasticity and strength. Thermo cycles of combustion engines and thermal load. Combustion engines maps.
Planned learning activities and teaching methods
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
Course-unit credit: Active participation in workshops. Examination: Written and oral.
Aims
The main goal is to describe utility properties of tractors.
Specification of controlled education, way of implementation and compensation for absences
Attendance in seminars is obligatory, checked by teacher. The way of implementation and compensation of absence is solved individually with subject guarantor.
The study programmes with the given course
Programme M2I-P: Mechanical Engineering, Master's
branch M-ADI: Automotive and Material Handling Engineering, compulsory-optional
Type of course unit
Lecture
26 hours, optionally
Teacher / Lecturer
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
26 hours, compulsory
Teacher / Lecturer
Syllabus
1. Driving gear and power transmission.
2. Driving gear auxiliary drive shaft.
3. Practical measurements of gear boxes – saw tooth diagram.
4. Exploitation equipment of tractors.
5. Forces influencing tractors with attached implement.
6. Practical measurements of regulatory systems of three-point suspensions.
7. Forces influencing tractors four-wheel tractor.
8. Measurements on roll dynamometers.
9. Output balance.
10. Measurements on roll dynamometers.
11. Adhesion and pulling efficiency.
12. Pulling characteristics.
13. Measurements on roll dynamometers.