Abstract:
A friction wheel drive for an internal combustion engine's a unit belt drive for a secondary unit includes a control system, a friction wheel that engages frictionally with an outer side of a belt in a wrap-around portion of a drive wheel of the internal combustion engine and that is controlled by the control system to engage or disengage frictionally with a drive wheel of the secondary unit, and a guidance system having an arc section for guiding the movement of the friction wheel with the control system. The arc section is arranged equidistant from the axis of rotation of the drive or driven wheel relative to the driven wheel to the outside of the belt in the wrap-around portion for turning the secondary unit on and off.
Abstract:
A cooling circuit includes a valve device (1, 1', 1") for a separate heat exchanger (42), especially of an internal combustion engine (48). To achieve a combined pressure limitation and pipe or hose break valve, a valve body (6, 35, 50), upon reaching a coolant throughput for maximum heat transfer in heat exchangers (42) located downstream, is actuated as a function of delivery pressure into an engaged position with a valve seat (5, 51). A throttle passage (7, 36, 52) maintains a coolant throughput that corresponds to maximum heat transfer. In the event of a pipe or hose break, the valve body (6, 35, 50) serving as part of a pipe or hose break is locked in a closed position.
Abstract:
An arrangement is disclosed for the apportioning if the idling air of internal-combustion engines having an adjustment motor for driving an adjusting member for changing a flow control cross-section and a supplementary device which can be actuated when the internal-combustion engine is rendered inoperative and is used for controlling the adjusting member into a minimum opening of the flow cross-section serving as an emergency cross-section. The supplementary device comprises two magnets arranged to mutually affect one another, one of the magnets being rendered essentially inoperative during the operation of the internal-combustion engine and thus during the operation of the arrangement.
Abstract:
Actuator adapted to cooperate with a drive of an endothermic engine including power source and a releasable accessory, the actuator including a box-shaped casing, a motorized eccentric group housed inside the casing and including a reduction gearing, an arm cooperating with the eccentric group and supporting a friction wheel adapted to cooperate with the accessory and with the power source, the arm being mobile between an engaged position and a disengaged position of the accessory.
Abstract:
A tensioner (1; 50; 60) for a vehicle belt drive, having a housing (2) defining a cavity (3) having an axis (A); at least one arm (4) fitted to the housing (2) to rotate about the axis (A); an idle pulley (5) fitted to the arm (4); a torsion bar elastic member (6) housed at least partly in the cavity (3) and having a first end portion (15) integral with the arm (4), and a second hand portion (16) connected rigidly to a retaining portion (17) to permit tensioning of the elastic member (6); and a damping device (30) for damping oscillation of the arm (4), and having a conical friction member (32) cooperating axially with a mating surface (34) and loaded by axial elastic means (33). The friction member (32) is interposed between the arm (4) and the housing (2); and the elastic member (6) produces an axial thrust component depending on torsion of the elastic member and for pressing the friction member (32) and the mating surface.
Abstract:
A belt tensioning device for a continuous belt drive. The device includes a torsion spring assembly (20) with a longitudinal axis (A2) and with at least one torsion bar or torsion tube (32). The torsion spring assembly (20) can be clamped axially and in a rotationally fixed way into a rack. A tensioning arm (19), at one end, is arranged at the torsion spring assembly (20) so as to be aligned approximately radially relative to the longitudinal axis (A2). A tensioning roller (15) is rotatably fixed at the other end of the tensioning arm (19). The axis of rotation (A1) of the tensioning roller (15) extends substantially parallel relative to the longitudinal axis (A2) of the torsion spring assembly (20), and the tensioning arm (19) can be resiliently supported relative to the rack so as to oscillate around the longitudinal axis (A2).
Abstract:
An articulated-arm assembly for a friction gear of an internal combustion engine that is equipped with belt-driven auxiliary assemblies. The assembly comprises a friction wheel which is urged into engagement with a belt of the auxiliary belt drive, and an articulated arm which guides the friction wheel and can be pivoted about an axis. This arrangement provides a compact articulation that uses existing installation space for the mounting of the articulated-arm assembly. The articulated arm is provided on a mounting unit with a pivot actuator, and preferably with a fixing device configured as a multi-part housing that permits the entire articulated-arm assembly to be mounted on the engine.
Abstract:
A belt drive for a secondary unit of an internal combustion engine includes a friction wheel drive having a friction wheel, a cam device for adjusting the engagement of the friction wheel to the drive wheel of the secondary unit, the cam device having a cam, a swivel arm by which the friction wheel is connected to the cam which is rotationally mounted on a side of the engine, and a spring biasing the swivel arm in a tension direction. The friction wheel is in permanent position of frictional engagement with a drive wheel of the secondary unit to drive the secondary unit and with an outside of a belt on a drive wheel of the internal combustion engine or of another secondary unit.
Abstract:
In a drive assembly for driving a pulley of a water pump of a combustion engine, a movable supporting arm is fitted idly with a drive wheel, and is loaded by a torsion spring to bring the drive wheel into angular engagement with the pulley fitted to the shaft of the pump, and with a drive belt of the engine; an actuating device being activatable to exert a force in opposition to that exerted by the torsion spring, and detach the drive wheel from the pulley.
Abstract:
An articulated-arm assembly for a friction gear of an internal combustion engine that is equipped with belt-driven auxiliary assemblies. The assembly comprises a friction wheel which is urged into engagement with a belt of the auxiliary belt drive, and an articulated arm which guides the friction wheel and can be pivoted about an axis. This arrangement provides a compact articulation that uses existing installation space for the mounting of the articulated-arm assembly. The articulated arm is provided on a mounting unit with a pivot actuator, and preferably with a fixing device configured as a multi-part housing that permits the entire articulated-arm assembly to be mounted on the engine.