Vehicle speed dependent hydraulic reaction force control valve - forms adjustable throttle and alters necessary steering wheel torque for assisted power steering

摘要

The auxiliary value is arranged so that its action depends on the vehicle speed. The valve controls the hydraulic pressure supplied to a reaction force chamber in the main vehicle power steering control valve. Thus, the driving torque in a steering wheel defined as the force required to turn the wheel by hand actually is made by vary controllably with variations in the vehicle speed. The predictable hydraulic steering pressure is a highly non-linear function of the handle steering torque. The main components to the auxiliary value system are: a main spool an auxiliary spool and a electromagnetic solenoid for moving the auxiliary spool is response to the vehicle speed. The two spools thus in concert acta as a variable speed-dependent throttle for this hydraulic system.