GF46.20-W-2001B | Single-circuit power steering when driving straightahead function | 15.8.97 |
STEERING 765.840 /844
LS 4 BK
STEERING 765.830
LS 6 BK
STEERING 765.820 /821
LS 8 BK
W46.25-1001-05
Diagram of single-circuit power steering in straightahead position
1 End limiting valve
2 Steering gear
3 Control cover (bottom)
4 Control cover (top)
5 Star valve
6 Power steering pump
7 Pressure limiting valve
8 Suction valve (replenishing valve)
9 Rotor
10 Torsion bar
11 Oil reservoir
W46.20-1007-05
End limiting valve in straightahead position
1 End limiting valve
A Lower working chamber
B Upper working chamber
Function
When driving straightahead and with a balanced ratio of forces in the steering gear (2), the rotor (9) of the star valve (5) is held by the torsion bar (10) in the middle position / neutral position vis-à-vis the control covers (3 and 4). The oil flow pumped by the power steering pump (6) flows without restriction through the star valve (5) into the return flow.
The same pressure conditions prevail in both working chambers (A and B).
The end limiting valve (1) is closed, the pressure limiting valve (7) is likewise closed.