Power steering control valve balancing

Details Power steering control valve balancing Power steering control valve balancing

1997-09-22

2000-03-14

Boehler, Anne Marie

Motor vehicles

Steering gear

With fluid power assist

74388PS, 180428, B62D 522

Patent

active

060359579

ABSTRACT:
A power rack and pinion steering gear (10) includes a rack (66), a pinion (54) meshing with the rack, and a power steering hydraulic motor (31) for moving the rack. The steering gear (10) includes first and second relatively rotatable valve members (40, 42) which control hydraulic fluid pressure in the hydraulic motor (31) and thereby control rack movement. A rotatable input shaft (50) is connected with the first valve part (40), the first valve part rotating upon rotation of the input shaft. A torsion bar (51) is connected between and acts between the input shaft (50) and the pinion (54). The steering gear (10) includes means, such as a rotatable fastener (56), for connecting the pinion (54) to the second valve (42) part to cause the pinion and the second valve part to rotate together. The fastener (56) is operable to rotate the second valve part (42) relative to the pinion (54) and the first valve part (40) while the torsion bar (51) is connected to the input shaft (50).

REFERENCES:
patent: 3296939 (1967-01-01), Eddy
patent: 4063490 (1977-12-01), Duffy
patent: 4742883 (1988-05-01), Duffy
patent: 4924696 (1990-05-01), Schroeder et al.
patent: 5655621 (1997-08-01), Birsching

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