Sistemas de Motores de Combustão

At the level of thermodynamics and operation of internal combustion engines.

In theoretical classes, a theoretical exposition of each subject is made.

In theoretical-practical classes, engine components and systems are identified in a laboratory context.

In the laboratory component, specialized practical work is carried out.

» To know the theoretical, theoretical-practices and practical aspects of the constitution, mode of operation, technologies and design of fuel and air suply systems, ignition systems, supercharging systems, lubrication systems, cooling systems and starting and charging systems, in internal combustion engines.
» Integrate the study of systems and components in internal combustion engines, with their respective functional diagrams and electrical diagrams.

CONVENTIONAL GASOLINE INJECTION SYSTEMS AND GDI SYSTEMS: multi-point and multi-point-sequential.
CONVENTIONAL IGNITION SYSTEMS: Function, composition and operation of the ignition system.
TRANSISTORIZED AND ELECTRONIC IGNITION SYSTEMS.
INTEGRATION OF ELECTRONIC IGNITION WITH ENGINE POWER SUPPLY.
AIR PURIFICATION: Air filters. Operation and maintenance.
INJECTION SYSTEMS IN COMPRESSION IGNITION ENGINES: C.I. Constitution and operation. Direct and indirect injection.
INJECTION PUMP REGULATORS AND ADJUSTMENT. “COMMON RAIL” SYSTEM: Operating principle. Organs and their function. Advantages of the system.
EDC – ELECTRONIC DIESEL CONTROL: Description and operation. System regulation.
SUPERCHARGING: Function of supercharging. Analysis of the advantages of supercharging in spark ignition (S.I.) and compression ignition (C.I.) engines. Operating principles and technological characteristics of supercharged engines, centrifugal compressors and turbochargers.
TURBO-COMPRESSOR: Turbine. Compressor. Turbocharger lubrication system. Variable geometry turbocharger. Electronic variable geometry valves. Description and operation of the boost pressure control valve. Position sensors on vacuum valves. Problems arising from the application of a turbocharger.
LUBRICATION SYSTEMS: Composition and operation of the different systems. Advantages and disadvantages of different types of lubrication. Types of lubricating oils. Lubricant usage rules.
Oil filters: different types of filters and their assembly.
COOLING SYSTEMS: Characterization of the different types of engine cooling solutions (air, water, other thermal fluids). Water pump: Features. Pump power. Dimensions. Materials used. Auxiliary water pump. Radiator: Tubular and cellular radiators. Radiator with removable elements. Variation of heat exchange power: Action on air flow. Coolant flow variation. Thermostats. Fan: Purpose of the fan. Types. Speed ​​and power. Antifreezes: Typology, characteristics and standards.
STARTING SYSTEMS AND CHARGING SYSTEMS Constitution and operation of starting and charging systems. Battery: Types of batteries; Verification, control and loading.

In this unit, the periodic assessment methodology is applied, with the following characteristics:
1) Final exam (A).
2) 2 tests, for which access requires a minimum of 75% attendance at all contact times (T+TP+PL), already elapsed on the test date.
3) 1 individual work prepared based on performance in practical-laboratory classes, with the respective oral presentation and discussion. This report will be written in Word format, using Times New Roman font, size 12, with at least 20 pages full of descriptive text, not counting the cover, index and bibliographic references. The bibliography of the work must mention at least 2 technical books on the subject or 2 scientific articles.
4) In the exams, each written exam will have a maximum duration of 2 hours.
5) The student's approval without taking a final exam is subject to compliance with the following requirements:
5.1) Attendance at least 75% of the total hours of the curricular unit;
5.2) Minimum average of 9 points in the grades of the 2 tests (A1);
5.3) A minimum of 8 points in the classifications of each of the 2 tests;
5.4) Average grade of no less than 9,5 points, on a scale of 0-20 points, corresponding to the performance demonstrated in the preparation and discussion of the individual practical-laboratoty work (B).
5.5) A minimum of 9.5 points in the “Final UC Grade”, calculated using the following expression:
Final UC grade = 0,75*A1+0,25*B;
6) The approval of students who take the final exam is subject to obtaining:
6.1) Minimum of 9 points in the final exam grade (A2);
6.2) Average grade of no less than 9,5 points, on a scale of 0-20 points, in the practical-laboratory component.
6.3) A minimum of 9,5 points in the “Final UC Grade”, calculated using the following equation:
Final UC grade = 0,75*A2+0,25*B
7) Both final exams and tests will be worth 20 points. In this quotation, the theoretical component contributes with a quotation of 8 values, the theoretical-practical component with 8 values ​​and the practical-laboratory component with 4 values.
h) If the practical-laboratory assessment component (B) is failed, the student will not be able to pass the current academic year, and the acronym NRC (Does not meet conditions) will be written on the agenda.
When failure results from not having reached the minimum defined for passing the final exam (A2) or the periodic assessment (A1), these will be the grades entered in the report card, without including the grade for the practical-laboratory work (B). ).
NOTES:
a) The use of reference elements or electronic devices, or others, is not permitted during the tests/exams.
b) In continuous assessment, each student may only produce and defend reports on experimental work in which he/she has participated.

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