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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.
English: Schematic diagram of dry sump lubrication for a piston engine. Date: 11 July 2008: ... Description={{en|1=dry sump lubrication for a piston engine}} ...
It is generally located inside the lower part of the engine, usually below and/or to one side of the crankshaft. On dry sump engines, at least two oil pumps are required: one to pressurize and distribute the oil around the engine components, and at least one other 'scavenge pump' to evacuate the oil which has pooled at the bottom of the engine. [9]
Dry sump engines in some drag racing cars use scavenging pumps to extract oil and gases from the crankcase. [18] A separator removes the oil, then the gases are fed into the exhaust system via a venturi tube. [citation needed]. This system maintains a small amount of vacuum in the crankcase and minimises the amount of oil in the engine that ...
Engine oil is recirculated around a four-stroke engine (rather than burning it as happens in a two-stroke engine) and much of this occurs within the crankcase. Oil is stored either at the bottom of the crankcase (in a wet sump engine) or in a separate reservoir (in a dry sump system). [3]
Lubrication is dry sump, and fuelling is via dual CV carburetors or fully redundant electronic fuel injection. The electronic fuel injected Rotax 912iS is a recent development. [5] The 912's lubrication system differs from most dry-sump designs in that oil is forced into the storage tank by crankcase pressure rather than by a separate scavenge ...
Compared to the standard AMG engine, the SLS's engine includes an all-new intake system, reworked valvetrain and camshafts, the use of flow-optimised tubular steel headers and dethrottling of the exhaust system. The engine also utilizes a dry-sump lubrication system to lower the center of gravity of the car. [3]
60° V12 engine; dry sump lubrication system engine displacement etc. 6.5: 6,498 cc (396.5 cu in); bore x stroke: 95.0 mm × 76.4 mm (3.74 in × 3.01 in), compression ratio: 11.8:1 cylinder block & crankcase cast aluminium alloy cylinder heads & valvetrain cast aluminium alloy; four valves per cylinder, 48 valves total, double overhead camshaft