Automotive air conditioning system damper position control

Details Automotive air conditioning system damper position control Automotive air conditioning system damper position control

1988-07-18

1989-06-20

Tapolcai, William E.

Automatic temperature and humidity regulation

Mixing fluid of dissimilar temperature

Plenum type

165 43, G05D 2312

Patent

active

048403083

ABSTRACT:
An automotive air conditioning system is provided which includes a damper position control device which controls the angular position of an air mix damper. The air mix damper controls the mixture of cool air and heated air to thereby control the temperature of air blown into a compartment by the air conditioning system. The damper position control device further includes a motor actuator which drive the air mix damper and a control circuit. The motor actuator includes a drive motor for the air mix damper and a rotation control device including a regulator which regulates the upper and lower rotational limits of the shaft of the drive motor and a position detector which detects the rotational angle of the shaft. The control circuit controls the motor actuator in accordance with a plurality of detected signals, such as an inside temperature signal, an outside temperature signal, etc. The control circuit is also responsive to position signals generated by the position detector which correspond to the upper and lower limitation of the rotational angle of the motor. The control circuit initiates control of the operation of the motor actuator upon inputting one of the position signals corresponding to the upper and lower rotational limits. The control circuit then determines whether the motor stops within the range of the upper and lower rotational limits. A signal from the position detector at the position at which the motor stops is used by the control circuit as one of the rotational limits of the regulator.

REFERENCES:
patent: 4456055 (1984-06-01), Yoshimi et al.
patent: 4611755 (1986-09-01), Mayanoga et al.
patent: 4671073 (1987-06-01), Oki

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