Steering: Description and Operation

SYSTEM DESCRIPTION
This power steering system is speed-sensitive. Its main components are a mechanical speed sensor, a rotary valve-type gearbox, and a constant volume, vane-type pump. The system regulates the power assist according to vehicle speed, road conditions, and driving style. The amount of power assist changes linearly from high assist, when driving at low speeds or parking, to low assist, when driving at high speeds.





FLUID FLOW DIAGRAM
The fluid volume from the pump, which is driven by the crank pulley, is regulated by the flow control valve built into the pump. The regulated fluid is fed to the valve body unit located outside the pinion shaft of the steering gearbox. The fluid is regulated to the proper pressure by the valves in the valve body unit and by the power steering speed sensor before it flows to the power cylinder. The direction of the flow is deermined by the rotary valve. The fluid then returns to the reservoir through the return passage and is fed to the pump again.