Fast response vehicle heater control - compares reference signal with compounded incoming air temp., heat exchanger temp. and inside temp. signal to operate proportional control

摘要

The vehicle heater control operates as a proportional control with a reference signal compared with a signal compounded from the temp. of the incoming air, the temp. output of the heat exchanger and the temp. inside the vehicle. The system provides a high output of heat when the temp. difference between the outside and inside is high, with the heat output modulated as the set temp. is reached. The temp. inside the vehicle is kept within set limits set limits and does not vary much with the outside temp. and the speed of the vehicle.