| 摘要 |
An oil cooler for a motor vehicle, having an outer tube (1) and an inner tube (2) which is disposed within the outer tube (1) and whose outer surface, together with the inner surface of the outer tube (1), forms an annular channel (3), sealed at both ends, for feeding oil to be cooled from an inlet (4) at one end of the tubes to an outlet (6) at the other end of the tubes, means (8) provided in the annular channel (3) for ensuring heat transfer from the passing oil to the surrounding tube walls, and turbulence-generating means (9) provided on the outer surface of the outer tube (1) for a coolant (10) in which the oil cooler is submerged, the turbulence-generating means (9) consisting of cup-shaped dimples (9) or dome shaped projections formed on the outer surface of the outer tube (1). Similar dimples and/or projections may also be provided on the inner surface of the inner tube (2). <IMAGE> |
