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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
A Peterson Dry System Pipe cutaway Perhaps the most notable design from the Kapp and Peterson factory was Peterson's famed 'Dry System' pipes, patented in 1894. Featuring a small reservoir intended to collect moisture before it reaches the smoker, the 'System Pipe' is designed to create a drier and cooler smoke and discourage the formation of ...
When there is a different oil reservoir the crankcase still catches it, but it is continuously drained by a dedicated pump; this is called a dry sump system. On its bottom, the sump contains an oil intake covered by a mesh filter which is connected to an oil pump then to an oil filter outside the crankcase. From there it is diverted to the ...
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]
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 ...
The BMC Mini was an early example of a car with the "gearbox-in-the-sump;" but this practice of using a single oil reservoir, which has become the norm for motorbikes, is generally undesirable for cars and trucks. Two stroke "total-loss" bikes always have separate oil for the gearbox, as engine oil is burned along with the fuel.
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The new engine was radically different from the previously used Weslake unit in that it featured twin overhead camshaft aluminium alloy cylinder heads, 4 valves per cylinder, a Lucas mechanical fuel injection system, dry sump oiling system, a steel crankshaft, and enlarged displacement of 3412cc, compared with the 2.9 litres of the previously ...