Process and apparatus for controlling an interior space temperat

Details Process and apparatus for controlling an interior space temperat Process and apparatus for controlling an interior space temperat

1990-10-24

1993-04-20

Bennet, Henry A.

Heating systems

Automatic control

Heat source is a reverse cycle refrigerating system or heat...

236 13, 236 76, G05D 2300

Patent

active

052034992

ABSTRACT:
In a process and apparatus for controlling an interior temperature of a motor vehicle a nominal temperature is set and is used with a sensed interior space temperature to produce a difference value which is fed to a controller (R). The controller produces a controlling value from the difference value which it feeds to an output stage (E) for cyclically and directionally driving a DC motor (M) which adjusts the position of an adjustable member (SG) to influence an amount of heat fed to an interior space (I) of the motor vehicle. A position signal of the adjustable member is measured and fed in a control loop in order to ensure an exact and dependable positioning of the adjustable member, with the positioning signal being formed by measuring and analyzing partial movements of the DC motor through predetermined angles for activations and further rotation of the DC motor.

REFERENCES:
patent: 4485863 (1984-12-01), Yoshida et al.

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