Apparatus for controlling actuators operative under negative...

Details Apparatus for controlling actuators operative under negative... Apparatus for controlling actuators operative under negative...

F - Mech Eng,Light,Heat,Weapons

15

B

341/39

F15B 9/06 (2006.01) B60H 1/00 (2006.01) G05D 23/19 (2006.01)

Patent

CA 1255776

ABSTRACT OF THE DISCLOUSURE An actuator control apparatus used for the control or the like of an air-conditioning system installed in a motor vehicle comprises a pressure source capable of producing alternately a negatife pressure and the atmos- pheric pressure, a decision circuit for determining whether vacuum or the atmospheric pressure is to be applied to the vacuum actuators, control means responding to the output of the decision means for connecting the actuator to be supplied with the negative pressure to the pressure source during a period in which the pressure source produces the negative pressure and connecting the actuator to be supplied with the atmospheric pressure to the pressure source during a period in which the pressure source produces the atmos- pheric pressure.

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