Abstract: A filter assembly for a control valve for controlling fluid flow in a hydraulic control unit of a vehicular brake system includes a substantially annular filter body. The body has an inner surface, an outer surface, a first end, and a second end. The inner surface defines an axial bore from the first end to the second end of the body. A portion of the axial bore adjacent the first end receives a portion of a valve body. The filter body is disposed within a bore of a housing. The outer surface defines a first axial groove. The housing contains a valve. The first end of the filter body defines a first radially extending groove which extends between the axial bore and the first axial groove. A filter portion is disposed within the axial bore for filtering fluid flowing through the axial bore.

Abstract: A filter assembly for a control valve for controlling fluid flow in a hydraulic control unit of a vehicular brake system includes a substantially annular filter body. The body has an inner surface, an outer surface, a first end, and a second end. The inner surface defines an axial bore from the first end to the second end of the body. A portion of the axial bore adjacent the first end receives a portion of a valve body. The filter body is disposed within a bore of a housing. The outer surface defines a first axial groove. The housing contains a valve. The first end of the filter body defines a first radially extending groove which extends between the axial bore and the first axial groove. A filter portion is disposed within the axial bore for filtering fluid flowing through the axial bore.

Abstract: A hydraulic control unit of a vehicular brake system includes a housing. A bore is formed in the housing. A valve seat is received in the bore. A sleeve is mounted on the valve seat. The sleeve includes an annular groove for receiving material from the housing to retain the sleeve on the housing. An armature core is slidably received in the sleeve.

Abstract: A fluid compensator is provided in a hydraulic control unit of vehicular brake system. The fluid compensator permits additional displacement of a master cylinder piston during anti-lock braking events only by storing fluid in the hydraulic control unit. The additional displacement moves a seal mounted on the master cylinder piston away from a compensator port orifice, thereby preventing repeated “nibbling” of the seal which can cause premature seal failure.

Abstract: A hydraulic valve control unit includes a valve body having an inner end, an outer end, and a fluid passageway. A housing has a bore which receives the inner end of the valve body. A sleeve has an open end which is placed over the outer end of the valve body. An armature is slideably mounted in the sleeve. A coil surrounds the sleeve for selectively moving the armature. A flux ring is disposed between the coil, housing and sleeve. The flux ring secures the sleeve to the valve body. The flux ring has a circumferential groove. A protrusion formed from the housing engages the groove to secure the flux ring, sleeve and valve body to the housing. A method of assembling the hydraulic control unit includes forming a bore in a housing, and inserting an inner end of a valve body into the bore. A sleeve is placed over an outer end of the valve body. A flux ring is pressed between the sleeve and the bore.