| 摘要 |
A vehicle power steering control device including a reaction assembly which applies a reaction force on the steering wheel that depends on both steering effort and vehicle speed. The device comprises a vehicle speed responsive modulator valve for controlling or modulating a pressure of fluid from a fluid pump in response to a signal from a vehicle speed sensor. Since the pressure of fluid from the fluid pump is proportional to the steering effort on the power cylinder, the output pressure of the modulator valve depends on both steering effort and vehicle speed and is transmitted into a reaction chamber. Thus, for low vehicle speeds, the driver encounters a small resistance in turning the steering wheel and, on the other hand, for high vehicle speeds, a large turning resistance is provided to avoid the danger of too rapid turning of the steering wheel and the road wheels
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