Sistemas e Componentes de Veículos

Knowledge of Physics, General Mechanics and Basics of Electrical and Electronics.

In theoretical classes, a theoretical presentation of each subject is given.
In theoretical-practical classes, vehicle components and systems are identified in a laboratory context.
In the laboratory component, specialized practical work is carried out.

» Know the theoretical and practical aspects of the constitution, operation, technologies and manufacturing processes of transmission systems, steering systems, brake systems, wheel and tire systems, air conditioning systems and anti-pollution systems.

1. VEHICLE DYNAMICS: Introduction to the dynamic states of vehicles; Acceleration/friction ratio; Static and dynamic loads on vehicles; Weight transfer; Vehicle behavior when starting and braking; Comfort and suspension efficiency ratio.
2. TRANSMISSION SYSTEM AND GEARBOX: General description of a transmission system; Clutch; Gearbox; Dual clutch gearboxes; Automatic gearboxes; Transmission shafts and joints; Differential; Half shafts and rear bridge.
3. STEERING SYSTEM: General description of a steering system; Steering box; Characteristic steering and wheel alignment angles; Classic power steering; Variable power steering; Interactions between steering, suspension and body.
4. SUSPENSION SYSTEM: General description of a suspension system; Spring and air suspension; Torsion bars and transverse stabilizer bars; Oil-dynamic shock absorbers; Friction dampers; Shock absorber effectiveness; Combined shock absorbers and suspensions.
5. BRAKE SYSTEM, WHEELS AND TIRES: General description of a brake system; Types of brakes; Hydraulic and pneumatic braking systems; ABS and EBS systems; Tires and wheels; Fault diagnosis in brake systems.
6. POLLUTANT EMISSIONS
Main polluting elements. Main environmental legislation and its evolution, within the scope of the automotive sector; Formation of pollutants and their control. Comparative analysis of different fuels; Periodic control of the efficiency of anti-pollution systems (IPO).
Energy efficiency of engines; Reduction of internal friction in engines; Impacts of direct fuel injection technologies (Diesel and gasoline); EGR systems (single, electric, pneumatic, dual); Variable distribution control/phase variators; Synchronization of EGR systems with phase variators (Valvetronic, VVTI and others); Impacts of supercharging and intermediate cooling systems (Intercooler); Variable geometry collectors; Operating point optimization technologies; Catalysts; Particle filters; Selective Catalytic Reduction System (Adblue); Main exhaust gas control sensors (Lambda probe; NOx sensor, NH3 sensor, pressure differential sensor, temperature sensor); Noise control strategies.
7-AIR CONDITIONING SYSTEM: Operating principle and composition of a refrigeration machine and a heat pump; Operating diagrams; Electrical connections; Charging the system with refrigerant fluid; Fault diagnosis in air conditioning systems.

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.

NAO