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Sistemas de motor automático

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Introduction to Aircraft Engine Systems – Ignition, Lubrication & fuel. The engine's power and torque is used to propel the aircraft forward. The engine also powers several other systems that are necessary to maintain the aircraft's safety and engine health. Each major system has its own post explaining how it works and what its purpose is. This post will give you a brief overview of the different systems and links to each larger post. The engine ignition system. An engine ignition system provides a steady supply of high-voltage pulses that are delivered to each cylinder's spark plugs. This must be done in the correct order of cylinder firing and at the right time in the engine cycle. The engine's functioning depends on ignition. This system must be kept separate from all other systems and isolated from the electrical system. Duel magnetos are a common method of igniting internal combustion engines. A magneto is an engine-driven spinning magnetic device that induces an alternating current via a soft iron core using electromagnetic induction. This changing current is then stepped-up through a transformer to a very high voltage, before being sent to the spark plugs via a distributor.Lubrication system.Internal combustion engines are comprised of many high-speed, high-temperature rotational components that move past one-another with small tolerances between them. These components change in temperature as they expand and contract. It is important that friction between these components is minimized during operation, and at all temperatures. The primary lubricant agent for engine oil is engine oil. It forms a thin layer between the components of the engine. The engine oil acts as a lubricating agent by cooling it and creating a thin film between engine components. A mechanical pump pumps oil under pressure through the engine. The oil then runs off the engine and is passed through an oil cooler. The oil pump will continue operating as long as the engine is in use. It keeps the engine lubricated. Pilots can monitor the pressure in the oil system through the cockpit's oil pressure gauge. This allows them to ensure that the engine has sufficient fuel for all flight phases. Fuel is stored either in the wings or in a tank in the cabin. It must reach the engine intake at the right pressure and be free from all contaminants and impurities. The delivery of fuel is an essential requirement for flight. As such, there is always redundancy in the system design. A lot of aircraft use a mechanical pump to drive fuel under pressure from the tank. This pump is also used by a secondary, manually selected electrical fuel pump for critical phases like take-off or landing. The fuel tanks in high-wing aircraft have the advantage of being located in the wings. This allows the gravity to be used for fuel.
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