Vehicle passenger compartment temperature control system with multi-speed response.

摘要

A system for controlling vehicle passenger compartment comfort. An electronic controller receives input from: (i) a thermistor array sensing blower plenum discharge temperature, (ii) a user movable Level Select Control (iii) a potentiometer sensing the position of a servo driven heater core water valve, (iv) an engine rpm tachometer generator and (v) a blower speed signal. The controller drives the servomotor for the water valve at a "High" rate until the valve position potentiometer indicates that the valve is within fifteen degrees (15<o>) of the target, whereupon the controller drives the servomotor at a "Low" speed. <IMAGE>