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Engine unit with lubricant cooling

  • US 4,393,922 A
  • Filed: 01/22/1981
  • Issued: 07/19/1983
  • Est. Priority Date: 01/22/1980
  • Status: Expired due to Fees
First Claim
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1. A differential gear of a vehicle driving axle lubricated by means of a liquid lubricant, having a lubricant collecting pipe as well as having a lubricant cooling system, comprising a heat pipe, with its heat-receiving part, that is circular in its cross section, projecting directly into the lubricant collecting space in an area of an especially high reflux current or turbulence of the lubricant in the collecting space;

  • the heat-emitting part of the heat pipe, in the operational installation position of the differential gear, is geodetically higher than its heat-receiving part; and

    the heat-emitting part of the heat pipe is formed in a plate-shaped manner, of two sheet-metal plates that are welded to one another so that they are hermetically tight, with the heat-emitting part being exposed to ambient air and being aligned in the driving direction of the vehicle, where the surface in the heat-emitting part of the heat pipe that can be used for the formation of the condensate is larger than the surface in the heat-receiving part that can be used for the evaporation.

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