Plate type oil cooler

A method of making an oil cooler for use in a tank of a motor vehicle radiator comprising:

• providing a pair of plate shells, at least one plate shell having walls for forming at least one serpentine passageway, the walls of the passageway being in thermally conductive communication with the at least one plate shell to transfer heat from the oil in the passageway to coolant when the oil cooler is immersed in coolant in the radiator tank;
• assembling the pair of plate shells by sealing the shells along peripheries thereof and by sealing the walls of one plate shell to the other plate shell to form a plate assembly having an interior space between the shells, the walls after sealing forming at least one serpentine passageway in the interior space for passage of oil to transfer heat from the oil in the passageway to coolant when the oil cooler is immersed in coolant in the radiator tank;
• optionally adding at least one additional plate assembly to form an oil cooler.

An oil cooler for use in a tank of a motor vehicle radiator having at least one plate assembly comprising a pair of plate shells sealed along peripheries thereof to form an interior space for passage of oil to be cooled, at least one plate shell being deformed to provide projections extending into the interior space to cause turbulence in the oil passing therethrough and promote transfer of heat from the oil in the passageway through the plate shells to coolant when the oil cooler is immersed in coolant in the radiator tank.

A method of making an oil cooler for use in a tank of a motor vehicle radiator comprising:

• providing a pair of plate shells, at least one plate shell being deformed to provide projections extending therefrom;
• assembling the pair of plate shells by sealing the shells along peripheries thereof to form a plate assembly having an interior space between the shells, the projections extending into the interior space to cause turbulence in the oil passing therethrough and promote transfer of heat from the oil in the passageway through the plate shells to coolant when the oil cooler is immersed in coolant in the radiator tank;
• optionally adding at least one additional plate assembly to form an oil cooler.

A heat exchanger assembly comprising:

• an oil cooler having fittings thereon for passage of oil into and out of the oil cooler, the oil cooler fittings each having a flange with a groove formed therein, the groove having a depth and a width between opposite walls;
• a heat exchanger tank having openings in a wall of the tank for passage of the fittings of the oil cooler;
• an elastomeric gasket in the oil cooler flange groove, the gasket having an elliptical cross section in an undeformed state with a major diameter in the width direction of the groove and a minor diameter in the depth direction of the groove, the gasket being deformed by contact with the tank wall to fill essentially the entire region between the groove and the tank wall, thereby sealing the tank wall and opening to the oil cooler fitting.

An oil cooler for use in a tank of a motor vehicle radiator having at least one plate assembly comprising a pair of plate shells, each plate shell having opposite upstanding walls, with one plate shell having a smaller width between upstanding walls than the other plate shell, the plate shells being nested so that the upstanding walls are in contact and sealed along peripheries of the shells to form an interior space therebetween, the width of the plate assembly being equal to the width of the shell having the larger distance over the plate shell upstanding walls.