Claims
- 1. A control valve for controlling fluid low in a hydraulic control unit of a vehicular brake system comprising:
- a valve body;
- a flux tube mounted on the valve body;
- an armature core having first and second ends and a longitudinal passage, the armature core slidably received in the flux tube; and
- a bearing element formed from a low-friction material, the bearing element including a stem received into the longitudinal passage and an end cap having a diameter greater than a diameter of the armature core.
- 2. The control valve defined in claim 1 wherein the low-friction material of the bearing element is a moldable.
- 3. The control valve defined in claim 1 wherein the end cap maintains a gap between the armature core and the flux tube.
- 4. The control valve defined in claim 1 wherein the end cap includes a stub formed on an outer surface opposite the stem.
- 5. The control valve defined in claim 4 wherein the stub terminates in a planar surface.
- 6. The control valve defined in claim 5 wherein the valve body includes a surface that cooperates with the planar surface of the stub to form a valve.
- 7. The control valve defined in claim 1 wherein the end cap includes an annular recess formed at a perimeter of an outer surface, the recess seating one end of a spring biased between the bearing element and the valve body.
- 8. The control valve defined in claim 1 wherein the end cap includes at least one void formed in a perimeter of the end cap.
- 9. A hydraulic control unit of a vehicular brake system comprising:
- a housing;
- a bore formed in the housing;
- a valve body mounted in the bore;
- a flux tube mounted on the valve body;
- an armature core having first and second ends and a longitudinal passage, the armature core slidably received in the flux tube; and
- a first bearing element formed from a low-friction material, the first bearing element including a stem received into the first end of the longitudinal passage and an end cap having a diameter greater than a diameter of the armature core.
- 10. The hydraulic control unit defined in claim 9 including a second bearing element formed from a low-friction material, the second bearing element including a stem received into the second end of the longitudinal passage.
- 11. The hydraulic control unit defined in claim 10 wherein the first and second bearing elements are integrally molded.
- 12. The hydraulic control unit defined in claim 10 wherein the second bearing element includes an end cap having a diameter greater than a diameter of the armature core.
- 13. The hydraulic control unit defined in claim 12 wherein each of the first and second bearing elements includes a stub formed in an outer surface opposite the stem.
- 14. The hydraulic control unit defined in claim 13 wherein the stub formed on the first bearing element includes a planar surface cooperating with a conical surface formed on the valve body to form a valve.
- 15. The hydraulic control unit defined in claim 13 wherein the stub formed on the second bearing element forms a stop between the armature core and the flux tube.
- 16. The hydraulic control unit defined in claim 10 wherein the armature core with the first and second bearing elements mounted thereon form a symmetrical armature.
- 17. The hydraulic control unit defined in claim 12 wherein the end caps provide a gap between the armature core and the flux tube.
- 18. The hydraulic control unit defined in claim 12 wherein each bearing element includes a central fluid passage.
CROSS-REFERENCE TO RELATED APPLICATION
This invention claims the benefit of U.S. provisional patent application identified as Application Number 60/060,908, filed Oct. 3, 1997.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
44 31 457 |
Mar 1976 |
DEX |