| 摘要 |
<p>@ An electro/pneumatic power steering system for an automotive vehicle having a source of pressurized air. The power steering system having a torque sensor (26) generating a torque signal indicative of the torque applied to the vehicle's mechanical steering mechanism (1, 2, 3), a controller (24) generating a pair of mutually exclusive pulse train signals indicative of the direction and magnitude of the applied torque, a pneumatic cylinder (10) linked to the vehicle's mechanical steering mechanism, and a pair of electrically actuated proportional valves (20, 22) for pressurizing one or the other end of the pneumatic cylinder (10) in response to one or the other of the mutually exclusive pulse train signals. The proportional valves (20, 22) venting the opposite ends of the pneumatic cylinder (10) to the atmosphere in the absence of either pulse train signal removing the authority of the power steering system about the zero torque level.</p> |
