Patent ID: 6016964
Filing Date: 2000-01-25
Classification: B60H,F24F

Abstract:
An air-mix door control device for an automobile air-conditioning system, having an opening position detector for detecting an opening position of an air-mix door, and controlling a motor actuator based on an opening position signal from said opening position detector so that said air-mix door is at a target opening position, comprising:trouble detecting means for detecting trouble of said opening position detector;home-position setting means, responsive to trouble detection of said trouble detecting means, for home-position-setting said air-mix door for a full-hot position or a full-cool position by controlling said motor actuator when it is necessary to set said air-mix door for a new target opening position other than the full-hot position or the full-cool position;reverse drive time calculating means, responsive to said home-position setting means, for setting a reverse opening angle width of said air-mix door from the home-position-set position to the new target opening position, recognizing a current battery voltage, and calculating a reverse drive time required for reversely rotating said air-mix door by the reverse opening angle width based on the reverse opening angle width and the current battery voltage so as to correct a time error derived from a torque variation of said motor actuator due to a battery voltage; andreverse driving means, responsive to said reverse drive time calculating means, for reversely driving said air-mix door by the reverse drive time by controlling said motor actuator.