Servo valve for a hydraulic power-assisted steering system

The invention relates to a servo valve (20) for a hydraulic power-assisted steering system of motor vehicles, comprising a tubular external control sleeve (24) that is connected to an output shaft (28) and has first control grooves (32) on its internal surface (34). Furthermore, a tubular coupling s...

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Bibliographic Details
Main Authors KOGAN ALEXANDER, KELLER JENS, OLIVERI SALVATORE, JANZ BERND
Format Patent
LanguageChinese
English
Published 09.02.2011
Subjects
LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
MOTOR VEHICLES
PERFORMING OPERATIONS
TRAILERS
TRANSPORTING
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Summary:The invention relates to a servo valve (20) for a hydraulic power-assisted steering system of motor vehicles, comprising a tubular external control sleeve (24) that is connected to an output shaft (28) and has first control grooves (32) on its internal surface (34). Furthermore, a tubular coupling sleeve (26) is provided which is at least partly disposed within the external control sleeve (24). Said coupling sleeve (26) has second control grooves (36) on its external surface (38). The second control grooves (36) can be made to be congruent with the first control grooves (32) of the external control sleeve (24). The first control grooves (32) are arranged essentially in the circumferential direction of the tubular external control sleeve (24) while the second control grooves (36) are arranged essentially in the circumferential direction of the tubular coupling sleeve (26). The relative position between the external control sleeve (24) and the coupling sleeve (26) can be modified in theaxial direction.
Bibliography:Application Number: CN200880120747