Abstract: A collapsible steering column assembly includes: a mounting bracket having a pair of arms and is configured to be fixed to a vehicle body; a supporting housing which is disposed between the pair of arms to be tiltable about the mounting bracket; a steering column which passes through the supporting housing so as to be able to undergo a tilt motion together with the supporting housing; and a locking device which is configured to be in a locking state or an unlocking state to selectively allow a telescopic motion and a tilt motion of the steering column by selectively applying clamping force to the pair of arms. The steering column comprises an outer jacket and an inner jacket which is slidably inserted into the outer jacket.

Abstract: A motor control method for controlling a motor of an electric power assisted steering system includes: generating a low pass torque signal and a high pass torque signal, respectively; generating a low frequency assist torque signal using the low pass torque signal and the vehicle speed; generating a high frequency assist torque signal using a high pass torque signal and the vehicle speed; generating a torque command signal using a sum of the low frequency assist torque signal and the high frequency assist torque signal; and generating a voltage output signal for driving the motor using the torque command signal.

Abstract: A tripod constant-velocity joint includes: an outer joint member having a cavity elongated in a longitudinal direction and three roller tracks; an inner joint member having a center body and three journals outwardly radially protruded from the center body; and three roller assemblies respectively coupled to the journal in a state of being respectively disposed in the roller tracks. The respective roller assembly comprises: an inner race which is connected to the journal and is provided with a first inner ball groove and a second inner ball groove on both lateral sides thereof; a first ball array and a second ball array respectively having a plurality of balls which are respectively disposed in the first inner ball groove and in the second inner ball groove; and a ball cage which restricts movements of the first ball array and the second ball array in a longitudinal direction thereof.

Abstract: An electric power steering system includes: a housing defining a receiving space therein; a worm shaft disposed in the receiving space to be engaged with a worm wheel; a tilt plug coupled to an inner surface of the housing to be fastened to a predetermined position, and coupled to the worm shaft which is inserted into the receiving space to support the worm shaft; and an elastic supporter which is installed to the housing to elastically support the tilt plug toward the worm wheel. The tilt plug is provided with a coupling protrusion which is protruded from an end portion of the tilt plug in a center axis of the tilt plug and slides into an inner surface of the housing, and the inner surface of the housing is provided with a coupling indentation into which the coupling protrusion slides to restrict rotation of the tilt plug.

Abstract: A master cylinder includes: a cylinder housing; a piston which is movably disposed in the cylinder housing so as to form a pressure chamber and a hydraulic fluid supplying chamber; a sealing member which is interposed between the cylinder housing and the piston. The piston has a plurality of communication holes for connecting the pressure chamber and the hydraulic fluid supplying chamber, and the plurality of communication holes are formed on a slanted surface which is provided to an outer surface of the piston.

Abstract: A master cylinder includes: a cylinder housing; a piston which is movably disposed in the cylinder housing so as to form a pressure chamber and a hydraulic fluid supplying chamber; and a sealing member which is interposed between the cylinder housing and the piston. An indentation portion is provided on an outer circumferential surface of the piston, wherein a rear wall of the indentation portion is formed as a slanted surface. A plurality of first communication holes are formed on a bottom surface of the indentation portion and a second communication hole is formed on the rear wall of the indentation portion.

Abstract: A tripod constant velocity joint includes: a spider having a plurality of trunnions; a plurality of roller assemblies which are respectively assembled to the plurality of the trunnions; and a housing defining a plurality of track grooves which respectively receive the plurality of roller assemblies. The respective roller assembly includes: an inner roller which is coupled to the trunnion; an outer roller which is disposed to surround the inner roller; a needle roller which is interposed between the inner roller and the outer roller; and an elastic member which elastically supports the outer roller outwardly in a radial direction with respect to the inner roller.

Abstract: A brake light sensor module includes: a retainer which is provided to move together with an operation element of a master cylinder in response to a depression of a brake pedal; an operation rod which is connected to the retainer so as to move together with the retainer; an elastic member which is installed in the master cylinder; a signal transmitting element which is installed in the master cylinder, one end of the signal transmitting element being elastically supported by the elastic member, and the other end of the signal transmitting element being supported by the operation rod; and a sensor which is installed in the master cylinder so as to be operated by the signal transmitting element.

Abstract: A constant-velocity universal joint includes: an outer joint member having a plurality of outer ball grooves; an inner joint member having a plurality of inner ball grooves; a plurality of torque transmitting balls; and a ball cage. The outer ball groove and the inner ball groove respectively have a double shape, and a ratio O/H of an offset value O which is a distance between an inflection point of the outer ball groove and a line connecting centers of the torque transmitting balls in a state that the outer joint member and the inner joint member form 0 angle and a distance H between a center line of the inner joint member and a center of the torque transmitting ball in a state that the outer joint member and the inner joint member form 0 angle is within a range of 0.07 to 0.11.

Abstract: A tilting structure for providing a force for tilting a worm shaft of an electric power steering apparatus to a worm wheel includes: a guide block which is inserted into an insertion space of a housing of the electric power steering apparatus; an elastic member which is disposed within the guide block; and a plug which is movably disposed within the guide block and is elastically supported by the elastic member to exert a tilting force to a bearing which supports the worm shaft. The plug and the guide block are configured to be able to be connected to one another via a thread coupling.

Abstract: A tilting structure for providing a force for tilting a worm shaft of an electrically powered steering apparatus to a worm wheel includes: a guide block which is inserted into an insertion space of a housing of the electrically powered steering apparatus; an elastic member which is disposed within the guide block; and a plug which is movably disposed within the guide block and is elastically supported by the elastic member to exert a tilting force to a bearing which supports the worm shaft.

Abstract: Provided are a hollow drive shaft and a method for manufacturing the same in which a concentrated load to a weak point which may be occurred by differences of sectional thicknesses and outer diameters of the shaft is dispersed so that the strength may be uniform throughout the whole length of the drive shaft. The hollow drive shaft includes: one or more small-diameter portion having a hollow shape; and a large-diameter portion which is disposed in a vicinity of the small-diameter portion and has an outer diameter relatively greater than the small-diameter portion. A sectional thickness of the large-diameter portion is less than a sectional thickness of the small-diameter portion, and a first sectional portion from an outer surface to a point corresponding to 35% to 60% of a sectional thickness of the large-diameter portion is carburized to have a first hardness.