Vehicle height control apparatus

Details Vehicle height control apparatus Vehicle height control apparatus

1986-04-21

1988-03-29

Weaver, Ross

Land vehicles

Body elevation or tilt

Establishing riding or trim height

280707, B60G 1704

Patent

active

047338750

ABSTRACT:
A vehicle height control device that includes a pressure sensor 28 for detecting the pressure of compressed air supplied to pneumatic shock absorbers 10 for pneumatically bearing the load of a vehicle loads applied through the wheels. A control circuit 30 is included for controlling vehicle height based on the pressure detected by the pressure sensor 28. A waveform shaping circuit is connected between the control circuit 30 and the pressure sensor 28 and shapes the waveform to moderate the pressure change while the pressure is rising to a greater degree than while the pressure is dropping. The waveform shaping circuit includes a passive low-pass filter circuit 38, an active low-pass filter circuit 52 and a pair of diodes 70 and 72. The diodes 70 and 72 connected to the active filter circuit 52, allowing rapid capacitor discharge during decreases in signal amplitude while maintaining a slow discharge rate during decreases in signal amplitude.

REFERENCES:
patent: 4065154 (1977-12-01), Glaze
patent: 4105216 (1978-08-01), Graham et al.
patent: 4164664 (1979-08-01), Kasiewicz
patent: 4468050 (1984-08-01), Woods et al.
patent: 4540188 (1985-09-01), Meloche et al.

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