Base Knowledge
Thermodynamics, fluid mechanics and heat transfer.
Teaching Methodologies
In theoretical classes, a theoretical exposition of each subject is made using audiovisual media.
In the theoretical-practical classes, engine components and systems specified in the syllabus are identified and the resolution of theoretical and practical application exercises is carried out.
In the laboratory component, specialized practical work is carried out, at the level of laboratory analyzes of the functioning and diagnosis of failures of the systems studied in the theoretical and theoretical-practical classes.
Learning Results
»To know the theoretical and practical aspects of the operation, technologies and design of engine lubrication systems;
»To identify the function of the organs of the lubrication system, evaluation of its state of degradation and maintenance / repair;
»To use methods of controlling oil consumption;
»To assess the advantages of controlling oil pressure in the lubrication system;
»To know electrical schematics of lubrication systems;
»To know the theoretical and practical aspects of the mode of operation, technologies and design of the different engine cooling systems;
»To identify the components that integrate a cooling system;
»To know the elements that make up each type of pump for cooling systems;
»To perform disassembly and assembly operations, verification, control, regulation and replacement of the elements that incorporate a system of cooling;
»To interpret electrical command and control schemes;
»To know the theoretical and practical aspects of the operation, technologies and design of engine starting and loading systems;
»To integrate the study of systems and components with the respective functional diagrams and electrical diagrams.
Program
LUBRICATION SYSTEMS
Splash lubrication; Forced circulation lubrication: diagram of the lubrication circuit; Forced lubrication with dry sump; Mixing lubrication; Limiting oil pressure. Advantages and disadvantages of different types of lubrication.
Forced lubrication system: Oil pump; Pressure limiting valve; Oil filters: mesh filters, disc filters and cartridge filters; Manometers; Pressure indicator valve with control on the vehicle’s instrument panel. Interior engine ventilation: Advantages of oil and gasoline vapor recovery systems.
Types of lubricating oils: Types of lubricants; Lubricants for gasoline engines; Lubricants-detergents for diesel engines; Lubricants of constant viscosity; Advantages and disadvantages of different types of oil; Types of additives.
Rules for the use of lubricants.
Oil filters: several types of filters and their assembly.
COOLING SYSTEMS
Characterization of the different types of engine cooling solutions (air, water, other thermal fluids).
Description of cooling systems: Outside cooling by air: Amount of heat to be exchanged. Cylinder fins. Air-cooled cooling. Study of implemented technical solutions. Advantages and disadvantages.
Interior cooling by liquid fluids: Amount of fluid needed for cooling. Coolant circulation systems: thermosyphon and forced circulation. Advantages and disadvantages of the thermosiphon system versus forced circulation. Circuit capacity. Pressurized circuits.
Water pump: Features. Pump power. Dimensions. Materials used. Auxiliary water pump.
Pump drive: electric, timing belt, etc.
Radiator: Tubular and cellular radiators. Dismountable elements radiator. Water temperature in the radiator. Pressure radiators. Dimensions.
Pressure circuits. Discharge of steam.
Variation of the heat exchange power: Actuation in the air flow. Variation of the coolant flow rate. Thermostats.
Fan (Fan): Purpose of the fan. Types. Speed and power: number and shape of the blades. Fan control: absorbed power.
Fan contact.
Antifreeze: Features and standards. Types: antifreeze for more common use and cooling with special liquids. Corrosion phenomena: anticorrosive.
STARTING SYSTEMS AND CHARGING SYSTEMS
Starting system: Constitution and operation of the starter; Disassembly, verification, control, cleaning and assembly; Diagnosis and repair of faults; maintenance care.
Charging systems: Constitution and operation; Alternator: brushes and brush holders, stator; Electronic components; Differences from the dynamo. Reasons for abandoning the use of the dynamo; Disassembly, assembly, verification, control and cleaning;
Diagnosis and repair of faults.
Battery: Types of batteries; Verification, control and loading; Coupling of batteries in series and parallel; Maintenance care and use of battery charge assessment equipment.
Curricular Unit Teachers
Internship(s)
NAO
Bibliography
Recommended bibliography:
» Martins, J. (2006). Motores de Combustão Interna. 2ª. Edição, Publindústria.
» Lucchesi, D (1989). O Automóvel – Curso Técnico, vol. 1 e 2. Editorial Presença.
» Bocchi, G. (1987). Motori a Quattro Tempi. Hoepli Editore.
Complementary bibliography:
» Giacosa, D. (1986). Motores Endotérmicos. 3ª. Edição, Editorial Dossat, S.A.
» Arias-Paz, M (1970). Manual de Automóveis. Editora Mestre Jou.
» Boulanger, P. e Bernard, A. Motores Diesel. 4ª edição, Hemus. São Paulo.
» Vários Autores. (2003). Mecânica Automóvel, Editora Alves da Costa.
» Estévez, S. (1995). Tecnologia do Automóvel. Editora Plátano.
» CEPRA manuals on “Feeding Starting and Loading Systems” and ” Lubrication Systems”.
»SAE Standards – SAE OIL VISCOSITY AND MANUFACTURER REQUIREMENTS.
»MOTOR OIL CLASSIFICATION API.