Original Publication Date: 1991-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
There are many situations in which it is desired to be able to rapidly heat at least part of a system to an operating temperature while retaining the ability to dissipate relative large quantities of heat if the control temperature is exceeded. A prime example is an automotive engine where we want to quick warm-up in the winter but the capability of sustained operation in the summer. This is enabled in an automobile via a thermostat which prevents the internally-circulated coolant from passing through the primary heat dissipator (the radiator) if the coolant temperature is below the desired value.