lubrication$45586$ - translation to ελληνικό
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lubrication$45586$ - translation to ελληνικό

A METHOD OF INTERNAL COMBUSTION ENGINE LUBRICATION WITH OIL HELD IN A SEPARATE RESERVOIR
Dry sump lubrication; Dry-sump lubrication; Dry-sump; Scavenge pump
  • Schematic diagram of a basic dry-sump engine lubrication system. The oil collects in sump (1), is withdrawn continuously by scavenge pump (2) and travels to the oil tank (3), where gases entrained in the oil separate and the oil cools. Gases (6) are returned to the engine sump. Pressure pump (4) forces the de-gassed and cooled oil (5) back to the engine's lubrication points (7).

lubrication      
n. λάδωμα, γρασσάρισμα
jet engine         
  • Jet engine during take-off showing visible hot exhaust ([[Germanwings]] [[Airbus A319]])
  • U.S. Air Force [[F-15E Strike Eagle]]s
  • Typical combustion efficiency of an aircraft gas turbine over the operational range.
  • Typical combustion stability limits of an aircraft gas turbine.
  • Electronic centralised aircraft monitor (ECAM)]] Display
  • Propulsive efficiency comparison for various gas turbine engine configurations
  • Allies']] only jet aircraft to achieve combat operations during World War II.
  • JT9D]] turbofan jet engine installed on a [[Boeing 747]] aircraft.
  • Turbojet engine
  • A cutaway of the Junkers Jumo 004 engine
  • [[Heinkel He 178]], the world's first aircraft to fly purely on turbojet power
  • Dependence of propulsion efficiency (η) upon the vehicle speed/exhaust velocity ratio (v/v<sub>e</sub>) for air-breathing jet and rocket engines.
  • A pump jet schematic.
  • Rocket engine propulsion
  • [[Specific impulse]] as a function of speed for different jet types with kerosene fuel (hydrogen I<sub>sp</sub> would be about twice as high). Although efficiency plummets with speed, greater distances are covered. Efficiency per unit distance (per km or mile) is roughly independent of speed for jet engines as a group; however, airframes become inefficient at supersonic speeds.
  • Schematic diagram illustrating the operation of a low-bypass turbofan engine.
  • The [[Whittle W.2]]/700 engine flew in the [[Gloster E.28/39]], the first British aircraft to fly with a turbojet engine, and the [[Gloster Meteor]]
REACTION ENGINE WHICH GENERATES THRUST BY JET PROPULSION
Jet engines; Jet turbine; Jet engined; Aircraft jet engine; Jet-engine; Jet motor; Jet thrust; Jet Engine; Lubrication system of jet engines; Lubrication System of Jet Engines; Jet propulsion engine; Jet engine nozzle; Duct jet engine; Jet engines and volcanic ash; Jetmotor; Energy efficiency of aircraft jet engines; Jet aviation
μηχανή αεροπλάνου

Ορισμός

lubricate
['lu:br?ke?t]
¦ verb
1. apply oil or grease to (an engine or component) to minimize friction.
2. informal make convivial with alcohol.
Derivatives
lubrication noun
lubricator noun
Origin
C17: from L. lubricat-, lubricare 'make slippery', from lubricus 'slippery'.

Βικιπαίδεια

Dry sump

A dry-sump system is a method to manage the lubricating motor oil in four-stroke and large two-stroke piston driven internal combustion engines. The dry-sump system uses two or more oil pumps and a separate oil reservoir, as opposed to a conventional wet-sump system, which uses only the main sump (U.S.: oil pan) below the engine and a single pump. A dry-sump engine requires a pressure relief valve to regulate negative pressure inside the engine, so internal seals are not inverted.

Dry-sumps are common on larger diesel engines such as those used in ships, as well as gasoline engines used in racing cars, aerobatic aircraft, high-performance personal watercraft and motorcycles. Dry sump lubrication may be chosen for these applications due to increased reliability, oil capacity, reduction of oil starvation under high g-loads and/or other technical or performance reasons. Dry sump systems may not be suitable for all applications due to increased cost, complexity, and/or bulk, among other factors.