Automotive air conditioning system damper position control
US4840308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1988 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Jul 18, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60H1/00835
- WIPO fieldTransport
- WIPO sectorMechanical engineering
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 co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.