초록 ▼

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 va

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°) of the target, whereupon the controller drives the servomotor at a “Low”speed.

대표청구항 ▼

A system for automatically controlling temperature in a vehicle passage compartment comprising: (a) exothermic heat exchanger means including engine driven pump means having the speed thereof varying with engine speed connected for circulation of heated fluid therethrough; (b) valve means connected

A system for automatically controlling temperature in a vehicle passage compartment comprising: (a) exothermic heat exchanger means including engine driven pump means having the speed thereof varying with engine speed connected for circulation of heated fluid therethrough; (b) valve means connected for receiving said fluid including a valve member movable for controlling flow of said fluid through said heat exchanger means; (c) servomotor means operable upon energization to effect movement of said movable valve member; (d) blower means including duct means operable to effect a flow of air over said heat exchanger means including plenum means to direct said flow downstream of said heat exchanger means to said passenger compartment; (e) sensor means disposed in said flow on the downstream side of said heat exchanger means and operative to sense the temperature of said air flow to said passenger compartment and provide an electrical signal indicative thereof; (f) means operative to sense the position of said valve member and provide an electrical feedback signal indicative thereof; (g) temperature select means operative upon user actuation to provide an electrical temperature set signal; (h) flow rate means operative to provide electrical signal indicative of the varying rate of fluid flow in said heat exchanger means; (i) control circuit means including microcomputer means operative in response to said airflow temperature signal, said feedback signal, said set signal and said fluid flow to generate a control signal for energizing said servomotor means; and, (j) said control circuit means operative to add an idle compensation factor to said control signal at a fluid flow below a first threshold, and said circuit means operative for subtracting an idle compensation factor from said control signal at a fluid flow greater than a second threshold, said microcomputer means employing a P.I.D. algorithm for processing said airflow and set temperature signals to produce said control signal, said servomotor means energized at a first rate responsive to an indication of said valve member being less than a predetermined angular position from a target position and energized at a second rate significantly different from said first rate responsive to an indication of said valve member being greater than a predetermined angular position from said target position.