The Hosseini patent discloses a ride control system which connects and disconnects an accumulator from a lift cylinder hydraulic circuit as a function of machine ground speed. In other words, the system activates the ride control system when ground speed is above a set value and deactivates the ride control system when ground speed is below a second set value.
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The controller 212 is in electrical communication with a ride control switch 214 and a machine speed sensor 216. The ride control switch 214 is typically mounted at the operator station of the machine. Advantageously, the ride control switch 214 is a three position switch. The first, second, and third positions correspond to a RIDE CONTROL ON mode, a RIDE CONTROL OFF mode, and a RIDE CONTROL PROGRAM mode, respectively.

Cijelo objašnjenje 'sustava za kontrolu vožnje' na:
http://www.patentstorm.us/patents/5520499-description.html