Apparatus for controlling actuators operative under negative pre

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

1985-08-26

1986-10-07

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

98 201, 165 42, 165 43, 2511292, F15B 1306

Patent

active

046153578

ABSTRACT:
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 negative pressure and the atmospheric 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 atmospheric pressure.

REFERENCES:
patent: 4250924 (1981-02-01), Sakakibara et al.
patent: 4320797 (1982-03-01), Kagohata
patent: 4478274 (1984-10-01), Naganoma et al.
patent: 4513808 (1985-04-01), Ito et al.

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