Pressure control valve
AssigneeAlfred Teves Metallwarenfabrik GmbH & Co. OHG
InventorAndre F. L. Goossens
Life of this patent
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Abstract
A solenoid-operated pressure control valve in which a valve shaft can move transverse to its longitudinal axis to permit self-centering of a closure member at the end of the valve shaft, relative to a valve seat which receives the closure member, when the valve shaft is displaced along its longitudinal axis. Longitudinal displacement of the valve shaft is sealedly guided by at least one sealing element through which the valve shaft extends and which can move along a surface of a guide member against which the sealing element is positioned when the valve shaft undergoes self-centering which is permitted by the clearance fit between the valve shaft and a bore in the guide member through which the valve shaft extends.
Claims28
A solenoid-operated pressure control valve for hydraulic brake systems with slip control, comprising a valve shaft having a valve closure member which is guided in a valve housing with the valve shaft sealedly arranged in a guiding portion on the housing side, which guiding portion separates a first pressure chamber from a second pressure chamber, and comprising a pressure compensating channel connecting the first pressure cheer with the second pressure chamber, characterized in that the valve shaft guides at least one element which abuts against the guiding portion and which has a surface in contact with the guiding portion and along which surface the at least one sealing element slides radially relative to the guiding portion by the dimension of a clearance fit prevailing between the valve shaft and the guiding portion in order to hydraulically separate the first pressure chamber from the second pressure chamber.
A solenoid-operated pressure control valve for hydraulic brake systems with slip control, said valve comprising:
- a valve housing;
- a guide portion mounted within said valve housing defining a first pressure chamber and a second pressure chamber within said valve housing and having a bore extending between said first pressure chamber and said second pressure chamber;
- an inlet pressure fluid channel opening into said first pressure chamber;
- a magnet core mounted within said valve housing;
- pressure compensating means for connecting said first pressure chamber with said second pressure chamber;
- a valve shaft displaceable along its longitudinal axis extending through said magnet core and said bore of said guide portion and having a closure member at an end thereof, said bore dimensioned to have a clearance fit with said valve shaft which permits movement of said valve shaft transverse to its longitudinal axis;
- a valve seat positioned in said valve housing to receive said closure member upon displacement of said valve shaft along its longitudinal axis;
- an outlet pressure fluid channel leading from said valve seat;
- and at least one sealing element positioned against said guide portion sealedly surrounding said valve shaft and having a surface in contact with said guide portion and along which surface said at least one sealing element slides radially relative to said guide portion as said valve shaft moves transverse to its longitudinal axis.
A solenoid- operated pressure control valve for hydraulic brake systems with slip control, said valve comprising:
- a valve housing;
- a guide portion mounted within said valve housing defining a first pressure chamber and a second pressure chamber within said valve housing and having a bore extending between said first pressure chamber and said second pressure chamber;
- an inlet pressure fluid channel opening into said first pressure chamber;
- a magnet core mounted within said valve housing;
- pressure compensating means for connecting said first pressure chamber with said second pressure chamber;
- a valve shaft displaceable along its longitudinal axis extending through said magnet core and said bore of said guide portion and having a closure member at an end thereof, said bore dimensioned to have a clearance fit with said valve shaft which permits movement of said valve shaft transverse to its longitudinal axis;
- a valve seat positioned in said valve housing to receive said closure member upon displacement of said valve shaft along its longitudinal axis;
- an outlet pressure fluid channel leading from said valve seat;
- a first sealing element positioned within said first pressure chamber against said guide portion sealedly surrounding said valve shaft and having a surface in contact with said guide portion and along which surface said at least one sealing element slides radially relative to said guide portion as said valve shaft moves transverse to its longitudinal axis;
- and a second sealing element positioned within said second pressure chamber against said guide portion sealedly surrounding said valve shaft and having a surface in contact with said guide portion and along which surface said at least one sealing element slides radially relative to said guide portion as said valve shaft moves transverse to its longitudinal axis.
A solenoid-operated pressure control valve for hydraulic brake systems with slip control, said valve comprising:
- a valve housing having a stepped surface;
- a magnet core mounted within said valve housing;
- a guide portion:
- (a) mounted within said valve housing defining a first pressure chamber and a second pressure chamber within said valve housing and having a bore extending between said first pressure chamber and said second pressure chamber, and
- (b) fitted between said magnet core and said stepped surface of said valve housing;
- an inlet pressure fluid channel opening into said first pressure chamber;
- pressure compensating means for connecting said first pressure chamber with said second pressure chamber;
- a valve shaft displaceable along its longitudinal axis extending through said magnet core and said bore of said guide portion and having a closure member at an end thereof, said bore dimensioned to have a clearance fit with said valve shaft which permits movement of said valve shaft transverse to its longitudinal axis;
- a valve seat positioned in said valve housing to receive said closure member upon displacement of said valve shaft along its longitudinal axis;
- an outlet pressure fluid channel leading from said valve seat;
- and at least one sealing element positioned against said guide portion sealedly surrounding said valve shaft and radially displaceable relative to said guide portion as said valve shaft moves transverse to its longitudinal axis.
Dependencies are inferred from the claim text.