Microprocessor controlled climate control device for a plurality of mass transit vehicles

A heating, ventilation, and air conditioning system for a plurality of mass transit vehicles, each vehicle having at least one independently actuated heating, ventilation, and air conditioning unit, comprising:

• sensing means, disposed in each of the plurality of mass transit vehicles, for sensing existing temperature levels in a respective mass transit vehicle;
• control means, remote from said plurality of mass transit vehicles, for controlling the heating, ventilation and air conditioning unit of each of the plurality of mass transit vehicles, said control means including memory means for storing temperature values desired for each vehicle, and corresponding times of a day and days on which the stored temperature values are desired;
• means for selectively entering temperature values and corresponding times of a day and days when the temperature is desired into the memory means for each of the plurality of mass transit vehicles;
• comparator means, in communication with said sensing means and said control means, for comparing sensed existing temperature levels with stored temperature values for respective ones of the mass transit vehicles and generating a respective control signal for each respective mass transit vehicle, each said respective control signal being a function of a difference between the sensed temperature and the stored temperature value of a respective vehicle;
• and
• operating means, responsive to said control signals, for operating the heating, ventilating and air conditioning units of the respective vehicles for reducing the difference between the sensed existing temperature and the stored desired temperature of each respective vehicle.