초록 ▼

A sensor is associated with each suspension unit for adjusting the ride height of a vehicle, and each sensor gives an output that varies progressively with ride height. A control circuit, preferably microprocessor based, is arranged to (i) read each of the outputs at least once, preferably in sequen

A sensor is associated with each suspension unit for adjusting the ride height of a vehicle, and each sensor gives an output that varies progressively with ride height. A control circuit, preferably microprocessor based, is arranged to (i) read each of the outputs at least once, preferably in sequence, (ii) select the output which corresponds to the sensed ride height that differs most from the desired ride height, and (iii) apply a correction to the suspension unit associated with the selected output to adjust it towards the desired ride height. The control circuit repeats (i) to (iii) until all the sensed ride heights are within acceptable limits of the desired height whereupon the system enters a so-called trim mode. In this mode corrections are based on a calculated ride height at a conceptual center of height where height variations due to pitch and roll are minimal.

대표청구항 ▼

A self-levelling suspension system for adjusting the ride height of a vehicle so that is within acceptable limits of a desired ride height comprising a plurality of suspension units for adjusting the ride height between the sprung and unsprung parts of the vehicle, a respective ride height sensor as

A self-levelling suspension system for adjusting the ride height of a vehicle so that is within acceptable limits of a desired ride height comprising a plurality of suspension units for adjusting the ride height between the sprung and unsprung parts of the vehicle, a respective ride height sensor associated with each suspension unit and adapted to give an output that varies progressively with the ride height in the vicinity of the associated suspension unit, and control means for performing the steps of: (i) reading each of the outputs at least once, (ii) selecting the output which corresponds to the sensed ride height that differs most from said desired ride height, and (iii) applying a correction only to the suspension unit associated with the selected output to adjust it towards said desired right height, the control means being arranged to repeat steps (i) to (iii) until all the sensed ride heights are within said acceptable limits of said desired ride height.