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Question

In a dry sump lubrication system, scavenging pump is used to:

एक शुष्क नाबदान स्नेहन प्रणाली में, स्कवेंजिंग  पंप का उपयोग किया जाता है

A.

pump oil from sump to tank

B.

 pump oil directly to all moving parts

C.

develop additional oil pressure

D.

 pump oil from sump to filte

Answer ( Option A)

pump oil from sump to tank

Solution

  • A dry sump lubricating system is used for the supply of oil and is carried out in an external tank.
  • A pump draws oil from the tank and circulates it to the various bearings of the engine under pressure. Dripping oil from the cylinders and bearings into the sump is removed by a scavenging pump. So, oil is prevented from accumulating from the base of the engine.
  • The capacity of the oil pump is always less than the scavenging pump. A filter with a bypass valve is placed in between the supply tank and scavenge pump in this system. The
  • pressure relief valve opens permitting oil to bypass the filter and reach the supply tank when the filter is clogged.
  • To remove heat from the oil, separate the oil cooler with either water or air as the cooling medium is provided in the dry-sump system.

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