Aeg Westinghouse Transportation Systems

Carl K Hvozda

Kenneth Andrew Karg

Robert N Neddermeyer

Alexander Feld

A heating, ventilation and air conditioning (HVAC) system and method for a plurality of mass transit vehicles where each vehicle has at least one independently actuated HVAC unit comprises a command center remote from the plurality of mass transit vehicles, for individually controlling the HVAC unit of each of the plurality of mass transit vehicles. The command center control unit includes a memory unit for storing temperature values desired for each vehicle, and corresponding times of a day and days on which the stored temperature values are desired within each respective vehicle. A sensing device is disposed within each of a plurality of mass transit vehicles. A comparator device, disposed in communication with the plurality of sensing devices and the command center, compares sensed existing temperature levels with stored temperature values for respective ones of the mass transit vehicles and generates control signals being a function of a difference between the sensed temperature and the stored temperature value of a respective vehicle. An operating device, responsive to the generated control signals operates the respective HVAC units of the respective vehicles to reduce the difference between the sensed existing temperature and the stored desired temperature of each respective vehicle.

Microprocessor controlled climate control device for a plurality of mass

A system for controlling the amount of fresh air being introduced into a people mover vehicle. A variable flow exchange is provided based on the number of passengers in the vehicle thus controlling the amount of positive ventilation in relation to the passenger load. The people mover vehicle is electrically powered and, after the people mover vehicle leaves a station, the electric motor current is monitored and the vehicle speed is monitored. The motor current during the time that the vehicle speed is between about two miles per hour and about five miles per hour is proportional to the passenger load and, therefore, the ventilation requirements can be determined, and the appropriate amount of positive ventilation supplied, based upon the electric motor current monitored when the vehicle velocity is within the aforementioned range.

Growing community of inventors

Pittsburgh, PA, United States of America

Carl K Hvozda