memory to derive the approximate, actual superheat
level of the refrigeration system;
iii comparing said approximate, actual superheat level to
a preselected desired superheat level stored Within said
controller memory;
iv selectively actuating said electronic expansion valve in
response to control commands from said controller,
said control commands compensating for differences
betWeen said approximate, actual superheat level and
said preselected desired superheat level.
3. The method of claims 1 or 2, further comprising the
steps of monitoring engine speed and applying said engine
speed reading to said algorithm stored Within the controller
memory to derive the approximate, actual superheat level of
the refrigeration system.
4. The method of claims 1 or 2, further comprising the
steps of monitoring evaporator fan speed and applying said
evaporator fan speed reading to said algorithm stored Within
the controller memory to derive the approximate, actual
superheat level of the refrigeration system.