Pneumatic control system, especially for vehicle heating systems

Details Pneumatic control system, especially for vehicle heating systems Pneumatic control system, especially for vehicle heating systems

1982-04-28

1984-03-13

Tapolcai, William E.

Automatic temperature and humidity regulation

Ventilator type

60409, 60412, 236 84, 417 18, F24F 1310

Patent

active

044362455

ABSTRACT:
A control system for controlling the operation of a heating or air conditioning system, especially for the passenger compartment of motor vehicles. The temperature in the compartment is maintained by an electronic controller which receives temperature-related signals from one or more temperature sensors. The electronic controller is connected to an air pump which may be operated as a source of pressure or vacuum and is coupled to a pneumatic actuator which moves a final control element, for example an air flow valve or a cooling water valve. The air pump supplies a continuous and reliable source of pressure or vacuum independently of the engine manifold vacuum. The air control conduit is coupled to a ventilating line which communicates with the atmosphere through a fixed or variable throttle.

REFERENCES:
patent: 2629537 (1953-02-01), Graybrook et al.
patent: 3120103 (1964-02-01), Beard et al.
patent: 3153325 (1964-10-01), Thorner
patent: 3263427 (1966-08-01), Childs
patent: 3305176 (1967-02-01), Brace
patent: 3411704 (1968-11-01), Hilgert et al.
patent: 3576292 (1971-04-01), Block
patent: 3693706 (1972-09-01), Nisley et al.
patent: 3947156 (1976-03-01), Becker
patent: 4262738 (1981-04-01), Kato et al.

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