Oil Temperature Regulator
The oil
temperature regulator (fig. 6-27)
must be used in diesel engine lubricating systems, prevents oil temperature from rising
too high in hot weather, and assists in raising the temperature during cold starts in
winter weather. It provides a more positive means of controlling oil temperature than does
cooling by radiation of heat from the oil pan wells.
The regulator
uses engine coolant in the cooling system to regulate the temperature of the oil and is
made up of a core and housing. The core, through which the oil circulates, is of cellular
or bellows construction and is built to expose as much oil as possible to the coolant that
circulates through the housing. The regulator is attached to the engine so that the oil
will flow through the regulator after passing through the pump. As the oil passes through
the regulator, it is either cooled or heated, depending on the temperature of the coolant
and then is circulated through the engine.
Some military
vehicles use an oil cooler (fig. 6-28)
that consists of a radiator through which air is circulated by movement of the vehicle or
by a cooling fan. Oil from the engine is circulated through this radiator and back to the
sump or supply tank. The radiator acts to cool the oil only in this system. It will not
heat oil in a cold engine. |
