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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
Because of the dry sump's external oil reservoir, excess air can escape the oil before the oil is pumped back through the engine. Dry sumps also allow for more power because they reduce the amount of windage , oil sloshing up into the rotating assembly, and the vacuum from the scavenge pump improves ring seal. [ 10 ]
Oil delivery 9 litres (2.4 US gal; 2.0 imp gal) oil, dry-sump, via two-stage controlled suction pump (250 litres (66 US gal; 55 imp gal) /min), a pressure pump and a 12 litres (3.2 US gal; 2.6 imp gal) external oil tank; Oil cooling External engine oil cooler in the front
Often though, oil in the sump can slosh during hard cornering, starving the oil pump. For these reasons, racing motorcycles and piston aircraft engines are "dry sumped" using scavenge pumps and a swirl tank to separate oil from air, which is also sucked up by the pumps. [2] A sump can also be found in an aquarium, mainly a reef system.
During the development process for the 997.2 generation of 911 engines, Porsche built out this engine oil sump rig to test its new integrated sump system. It't a crazy bit of equipment to watch in ...
Vertically-mounted engine model for helicopters, with a dry sump oil system, with crankcase and oil sump modifications for increased strength. It produces 260 hp (194 kW) at 3400 rpm for takeoff, with a compression ratio of 7.3:1, a dry weight of 390 lb (177 kg) and fitted with a Marvel MA-4-5 or MA-4-5AA carburetor.
The engine is fitted with two twin-choke SU DU6 carburettors. The front of the engine mounts a separate case that includes drives for the camshafts, oil pump, fuel pump, distributor and tachometer, with provision for the future addition of a fuel injection pump and dry sump oil scavenge pump. [2]
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