Control circuit for load-leveling shock absorbers

Details Control circuit for load-leveling shock absorbers Control circuit for load-leveling shock absorbers

1977-12-13

1979-08-14

Hix, L. T.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307 10R, 280707, 280DIG1, 91 35, 307246, H01H 3538

Patent

active

041646649

ABSTRACT:
A control circuit for an air-spring shock absorber controls pressurization or depressurization of the air chamber of the shock absorber in response to the output signal condition of a level sensor. The control circuit includes a first signal path that conditions the operation of an air pump for pressurizing the air chamber, and a second signal path that conditions the operation of an exhaust valve for depressurizing the air chamber. A timing circuit delays the enablement of the air pump and exhaust valve until the level sensor output signal condition associated with the actuation of the pump or valve has existed for a minimum predetermined time period. The timing circuit includes an R-C time delay circuit with an instant reset to avoid cumulative signal build-up. The control circuit is comprised of a set of digital logic gates which are preferably implemented by standard integrated circuit chips.

REFERENCES:
patent: 3681671 (1972-08-01), Elliott
patent: 3830138 (1974-08-01), Joneleit
patent: 4017099 (1977-04-01), Hegel

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