Heating, Ventilation, & A/C System

The heating, ventilation, and air conditioning (HVAC) systems are controlled by the computer system. These systems operate on the basis of receiving information from teh sensors in various locations (INPUTS). When those conditions match the preprogrammed circumstances, the computer causes certain actuators to adjust accordingly (OUTPUTS).

In a late model automobile, an act as seemingly simple as turning on the A/C involves a computer receiving that signal from the (INPUT), monitoring as many as seven other operating conditions (INPUTS), and if conditions match its program, it causes the A/C clutch to engage, the cooling fans and blower motor to run and engine idle speed to increase (to accommodate the compressor and alternator loads being added). These actions are all OUTPUTS.