Auxiliary power steering for motor vehicles

摘要

A power steering gear assembly having a single control valve suitable for use in a single circuit type of power steering system, may be simply converted to use in a two-circuit type of power steering system by replacement of the steering spindle and the addition of a housing extension enclosing a second control valve formed on the replaced steering spindle. Both control valves include portions of the common steering spindle and control sleeves rotatable thereon, with one of the control sleeves being formed in one piece with the worm shaft of the steering gear assembly.