Control circuit for a vehicle leveling system

Land vehicles – Body elevation or tilt – Establishing riding or trim height

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Details

267 6428, 307118, 310DIG3, B60G 1700

Patent

active

044338490

ABSTRACT:
A control circuit for a vehicle levelling system including a detecting device for detecting a change in vehicle height with respect to a predetermined reference vehicle-height position and generating a directional signal and an adjustment-on or -off command signal. A control device is provided for controlling the operation of a mechanical system according to the signals, and a holding device is provided for holding the adjustment-off signal for a certain period of time even when the command signal has changed from the adjustment-off signal to the adjustment-on signal. In case a plurality of reference vehicle-height positions are provided, in order that the switching between the reference positions can be performed smoothly, there is provided a circuit for interrupting the function of the adjustment-off signal holding circuit temporarily according to the switching operation. Moreover, in order to decrease the number of detectors which constitute the detecting device, a signal conversion circuit is provided in the detecting device.

REFERENCES:
patent: 4164664 (1979-08-01), Kasiewicz
patent: 4168840 (1979-09-01), Graham
patent: 4333668 (1982-06-01), Hendrickson et al.

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