The power steering pump is a rotary vane pump with two chambers. The rotor with vanes that extend under the action of centrifugal force rotates inside a shell with a special internal profiling, forming two chambers limited by the shell, thrust plate, pump cover and rotor surface. The extendable vanes divide the oil volume into separate volumes, which, when rotating, move to an area of smaller volume, due to which the oil pressure increases.
The control valve is a hydromechanical follow-up system that directs the flow of pressurized oil to the corresponding 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 setting shaft and the shaft connected to the rack. In this case, the valve closes and stops supplying pressure to the hydraulic cylinder.
The force applied by the driver to the steering wheel increases with increasing speed and decreases with decreasing speed.
| Characteristic | Meaning of the characteristic |
| Steering wheel | |
| Steering wheel type | 3-spoke |
| O.D | 390 mm |
| Number of revolutions from stop to stop | 4,3 |
| Steering column mechanism type | Shock-absorbing with variable column tilt angle |
| Oil pump type | Vane pump |
| Pump feed | 9.6 cm³/rev |
| Unloading pressure | 8.8 MPa |
| Steering gear transmission type | Rack and pinion |
| Ratio of rack travel to maximum steering wheel turning radius | 40 |
| Rack and pinion travel | 172 mm |
The text of the article was taken from the website: mitsubishiman.ru