Automotive oil cooler

Details Automotive oil cooler Automotive oil cooler

1975-05-06

1977-01-25

Davis, Jr., Albert W.

Heat exchange

Non-communicating coaxial enclosures

With communicating coaxial enclosure

165141, 184104B, F28D 710

Patent

active

040046346

ABSTRACT:
Submerged oil cooler for automotive vehicles requires only two principal parts but can provide more heat transfer at a lower pressure drop than conventional oil coolers which utilize three principal parts. In a preferred embodiment, an outer tube having a plurality of longitudinal flutes which are periodically transversely indented is press fit over an inner tube having a helically finned outer surface. The tubes are sealed at their ends so as to define an extended annular flow channel for oil between the tubes, while permitting engine coolant in which the cooler is submerged to flow through the inner tube. A modified arrangement substitutes corrugated tube for the finned inner tube with a resulting cost saving in material but with a small increase in pressure drop and a small loss in heat transfer efficiency.

REFERENCES:
patent: 1689461 (1928-10-01), Taylor et al.
patent: 2752128 (1956-06-01), Dedo
patent: 3177936 (1965-04-01), Walter
patent: 3235947 (1966-02-01), Sohlemann
patent: 3384154 (1968-05-01), Milton
patent: 3643733 (1972-02-01), Hall et al.
patent: 3829285 (1974-08-01), Beck

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