The power steering pump is a rotary vane pump with two chambers. The rotor with centrifugal blades rotates inside a shell with a special internal profile forming two chambers bounded by the shell, thrust plate, pump cover and rotor surface. Retractable vanes divide the oil volume into separate volumes, which, when rotated, move to an area of \u200b\u200ba smaller volume, thereby increasing oil pressure.
The control valve is a hydro-mechanical follow-up system that directs the flow of pressurized oil into the appropriate volume of the hydraulic cylinder until the mismatch between the position of the steering shaft and the position of the rack disappears. As soon as the driver stops applying force to the steering wheel, the hydraulic cylinder, by moving the rack, eliminates the mismatch between the positions of the input shaft and the shaft associated with the rack. In this case, the valve closes and stops the pressure supply to the hydraulic cylinder.
The force applied by the driver to the steering wheel increases with increasing speed and decreases with decreasing speed.
| Characteristic | Characteristic value |
| Steering wheel | |
| steering wheel type | 3 spoke |
| External diameter | 390 mm |
| Number of turns from lock to lock | 4,3 |
| Steering column mechanism type | Shock-absorbing variable-angle column |
| Oil pump type | Vane pump |
| pump delivery | 9.6 cm3/about |
| Unloading pressure | 8.8 MPa |
| Steering gear type | Rack |
| Ratio of rack travel to maximum steering radius | 40 |
| Rack travel | 172 mm |