Abstract: An internal combustion engine with two camshafts (4, 5) arranged side by side in the cylinder head (1), each having a mechanism (8, 9) for varying the control timing of gas exchange valves is provided. The feeding and discharge of the hydraulic pressure medium to and from the mechanisms (8, 9) takes place through electromagnetic control valves (15, 16), each including a cartridge which can be inserted into a valve holder (19, 20) and an attached electromagnet (23, 24) which has an electrical socket (27, 28) located on its clear front side (25,26). The valve holders (19,20) are constructed as separate flanged connectors which are situated directly above the bearings of the camshafts (4, 5) on the cylinder head of the engine in such a way that the control valves (15, 16) are situated beside each other with their cartridges facing away from each other and with their electromagnets (23, 24) facing each other along a common longitudinal axis running transverse to the longitudinal axis of the camshafts (4, 5).

Abstract: A device for independent hydraulic actuation of phase and axial positions of a camshaft of an internal combustion engine with a phase adjuster and an actuating piston arranged on a common axis for axial displacement of the camshaft. In order to reduce the space needed and construction expenditure of the device, the phase adjuster also acts as the actuating piston for the camshaft.

Abstract: A linear rolling bearing comprises a guide carriage (46) that is slidably supported through balls (3) on a guide rail (41). The balls (45) are retained in two guide members (47) that are detachably secured to a base body of the guide carriage (46) covering the upper side of the guide rail (41) and are arranged on longitudinal sides of the guide rail (41) that comprise raceways (50). For each endless circuit of balls, the guide members (47) comprise one raceway (51) for load-bearing balls (45), one return channel (48) for returning balls (45) and two deflecting channels that connect the regions of the load-bearing and returning balls (45) to each other. The guide members (47) are made of an elastic material, and the return channel (48) of each guide member (47) comprises an opening (49) that extends over its entire length and has a width that is smaller than the diameter of the inserted balls (45).

Abstract: A tensioning device for a chain (1) comprising a housing (3), said housing (3) carries a first sliding shoe (6) for contact with a first side (7) of the chain (1) with the tensioning device further comprising a tensioning piston (5,23) that is guided on the housing (3) and comprises a second sliding shoe (8,24) for contact with a second side (9) of the chain (1) whereby in an economic and simple-to-manufacture tensioning device, the housing (3) and the first sliding shoe (6) are made in one piece with each other.

Abstract: The invention relates to a needle bearing with an outer ring (1) terminating on both its ends in a collar (2, 3), and with bearing needles (4) guided in a cage in axis parallel disposition, as well as with a lubricant reservoir (9) arranged in the bearing. This bearing is characterized in that the lubricant reservoir (9) is formed by a groove (8), arranged in the outer ring (1), and by a middle part (5) of the bearing needles (4), with the middle part having a reduced diameter in relation to the remaining diameter of the bearing needles (4).

Abstract: In a valve train of an internal combustion engine (18) comprising a switchable, rotationally symmetrical component (1) such as a cam follower, a first body (8) acting as an anti-rotation device and a second body (12) acting as a mounting safety device project beyond the component (1). Due to the additional, second body (12) that acts as a mounting safety device, said component (1) can no longer be installed in bores for non-switchable components, for example, in the same internal combustion engine.

Abstract: A tappet (1) for the transfer of a lifting motion to a sliding part is provided having two parts, including a circular shaped section (2) with a base (5) connected to it as one piece and a separate dome-shaped socket (9) connected to the base (5) made of thin-walled material with a contact surface (10) for the sliding part. The tappet (1), whose socket (9) extends over a considerable length of the circular shaped section (2), can be economically manufactured.

Abstract: A lever-type cam follower (1) of a thin-walled material like sheet metal is proposed. It has a simply structured valve stem guidance in the region of one of its ends (5). The guidance comprises a separate securing element (6) with a basically U-shaped cross-section. A web (9) of the securing element (6) bears against a crossbeam (3) of the cam follower (1) and possesses an opening (11), for example punched, for receiving a valve stem.

Abstract: A tensioner for a power transmission element of a traction drive, includes a housing, a swivel arm having a free end for connection to a rotatable tension roller which rests on the power transmission element, and a swivel bearing, including an axle for connection to the swivel arm and a bushing forming part of the housing and supporting the axle, for rotatably supporting the swivel arm in the housing. A spring is positioned in a peripheral zone of the swivel bearing between the swivel arm and the housing. Mounted in fixed rotative engagement to the axle and supported by the housing via a friction lining is a friction disk, with a disk-shaped first dampening element positioned between the friction lining and the housing.

Abstract: A rolling bearing cage comprising a first side ring (1) and a second side ring (2) that are connected to each other by crossbars (3) so that pockets (5) for receiving rolling elements (4) are formed, and lubrication grooves (6) extend in axial direction up to said first and second side rings (1, 2) on at least one of peripheral surfaces and bore sections of the crossbars (3) wherein flow channels (7) are arranged in a fractional region of the lubrication grooves (6) and are set back relative to the lubrication grooves (6) in at least one of a radially inward and a radially outward direction. In this way, lubrication of such a bearing is substantially improved.

Abstract: In a switchable support element (1) for a valve train of an internal combustion engine, the lost motion spring (8) of the valve train is made as a torsion spring. This spring is arranged outside of the support element (1) and only the legs and the arms of the spring engage a housing and a head, respectively. In this way, the support element (1) requires no substantially larger design space than non-switchable prior art elements, particularly in axial direction.

Abstract: A hydraulic camshaft adjusting device in a rotary piston design, which comprises a drive wheel (2) that is drive-connected to a crankshaft and an impeller wheel (10) connected in a rotationally fixed manner to a camshaft (9), the drive wheel (2) comprising a cavity formed by a peripheral wall (3) and two lateral walls (4, 5), in which cavity at least one hydraulic working space is formed by at least two delimitation walls (7), the impeller wheel (10) has at least one radial blade (13), and with each blade (13) divides a hydraulic working space into two hydraulic pressure chambers, each blade (13) of the impeller wheel (10) is pressed by a spring element (17), by its upper end surface (8) against the peripheral wall (3) of the drive wheel (2) wherein each blade (13) of the impeller wheel (10) can additionally be pressed radially by the compressive force of the hydraulic pressure medium that can be selectively applied to its lower end surface (16), by its upper end surface (18) against the peripheral wall (3) o

Abstract: A release bearing includes a rolling-contact bearing having a non-rotatable outer ring, a rotating inner ring, and plural rolling members located between the outer and inner rings. The inner ring is intended to interact with an adjustment ring which has a ring flange for abutment against a disk spring of a clutch mechanism. Disposed in a support zone between the inner ring and the adjustment ring is a sliding element whereby the support zone is configured in the form of complementary calotte-shaped portions so that the adjustment ring and the inner ring are movable relative to one another for effecting a self-adjustment of the release bearing.

Abstract: A release bearing includes a rolling-contact bearing having a non-rotatable inner ring, a rotating outer ring, and plural rolling members located between the inner and outer rings, An adjustment ring having a ring flange is provided for abutment against a disk spring of a clutch mechanism, and a sliding element made of bearing material is disposed in a support zone defined between complementary calotte-shaped portions of the outer ring and the adjustment ring so that the adjustment ring and the outer ring are movable relative to one another for effecting a self-adjustment of the release bearing.

Abstract: The invention concerns a device for varying valve timing of gas exchange valves of an internal combustion engine, particularly a hydraulic camshaft adjusting device of a rotary piston type, said device comprising a drive pinion (2) connected in driving relationship to a crankshaft of the internal combustion engine and a winged wheel (3) connected rotationally fast to a camshaft of the internal combustion engine. The drive pinion (2) comprises a hollow space formed by a circumferential wall (4) and two side walls (5, 6), at least one hydraulic working chamber (10) being formed in the hollow space by at least two limiting walls (8, 9). The winged wheel (3) comprises at least one radial wing (12), and with each wing (12) it divides one hydraulic working chamber (10) into two hydraulic pressure chambers (13, 14) which, when pressurized by a hydraulic pressure medium effect a pivoting or a fixing of the winged wheel (3) relative to the drive pinion (2).

Abstract: There is provided a liquid additive thickener, or a liquid thickening agent, which can thicken easily when it is added to an object. The liquid additive thickener comprises a liquid that is prepared by dissolving a thickening agent into water and is initially inhibited from forming viscous solutions or gels. The liquid can begin to form a viscous solution when it is added to a water-containing object. The liquid may be: (a) prepared to have a low viscosity by dissolving a thickening agent into water together with a poor solvent; (b) prepared to have a low viscosity by dissolving a thickening agent into water together with a low viscous saccharide; or (c) prepared to have a low viscosity by dissolving a thickening agent into water together with a reactive ion.

Abstract: In a gearshift device (38) of a manual transmission comprising at least one transmitting means (2) that is arranged for pivoting and axial displacement relative to the transmission, a low-friction transmission of gearshift movements is achieved by the inclusion of a rolling bearing (47) taking up thrust loads.

Abstract: A guide roller with a sealing element (14) formed in one piece in a T-shape having a first axial sealing portion (15) that is placed securely onto a shoulder of the inner race, a second sealing portion (16) that extends radially outwardly and is located inside a second groove of the outer race (13), and a third sealing portion (17) that extends radially inwardly branching off from the first sealing portion (15) at its inner end is provided so that axial contact between the shoulder and the outer race (10) is prevented by the third sealing portion (17).

Abstract: A switchable support element (1) requiring only a small design space. For this purpose, a slide (12) that serves to couple an inner element (6) to an outer housing (3) in the support element (1) is positioned laterally in a housing (2) arranged in the cylinder head (5). At the same time, a bore (8) in the inner element (6) for the slide (12) is made as a pocket bore, the housing (2) being seated through an annular extension (11) directly in a bore (9) of the outer housing (3).

Abstract: A constant-velocity universal joint of a tripod type, includes a housing representing a first rotation part and having three tracks, each track having two flat running surfaces in parallel relationship, a second rotation part configured as a tripod spider and having three arms defined by arm axes arranged in a plane and intersecting in a joint axis. The arms are guided in the running surfaces of the housing, wherein each of the arms is received in a rolling-contact bearing including an inner ring, an outer ring, cylindrical rolling elements, and retainer rings arranged as mirror images of one another for mutual axial securement of all components of the rolling-contact bearing with respect to the arm axis.