Abstract: In a locking device for a camshaft adjuster comprising a drive housing with a rotor with spaced rotor vanes disposed in the drive housing between circumferentially spaced axial walls projecting radially inwardly so as to form operating chambers at opposite sides of the rotor vanes to which hydraulic fluid can be selectively admitted for controlling the relative angular position between the rotor to which a camshaft is connected and the drive housing which is driven by the crankshaft of the engine, wherein locking bolts are provided for interlocking the drive housing and the vane rotor and disposed in one of the housing and the rotor elements while a recess is formed in the other for receiving the locking bolt in order to interlock the drive housing and the vane rotor, the locking bolt is arranged in the hydraulic fluid supply path to the operating chambers upstream of the operating chamber in such a way that hydraulic fluid admission to the operating chambers is controlled by the locking bolt and is admitted

Abstract: In a camshaft adjuster having a 4/2-way valve which rotates with the camshaft and includes a hydraulic control valve with a hydraulic control spool or piston, which is actuated in a control cylinder against the force of a compression spring between two end stops by a magnet armature of an electromagnet which is fastened to a control casing, the electromagnet is a repelling proportional magnet, whose magnet armature is seated fixedly on an armature plunger whose free end face is in contact with the control spool or with a part fixedly connected to the latter for moving the control spool against the force of the compression spring to actuate the hydraulic control valve so as to control fluid admission to the camshaft adjuster, the working stroke of the electromagnet exceeding that of the control spool.

Abstract: In a locking device for a camshaft adjuster comprising a drive housing with a rotor with spaced rotor vanes disposed in the drive housing between circumferentially spaced axial walls projecting radially inwardly so as to form operating chambers at opposite sides of the rotor vanes to which hydraulic fluid can be selectively admitted for controlling the relative angular position between the rotor to which a camshaft is connected and the drive housing which is driven by the crankshaft of the engine, wherein locking bolts are provided for interlocking the drive housing and the vane rotor and disposed in one of the housing and the rotor elements while a recess is formed in the other for receiving the locking bolt in order to interlock the drive housing and the vane rotor, the locking bolt is arranged in the hydraulic fluid supply path to the operating chambers upstream of the operating chamber in such a way that hydraulic fluid admission to the operating chambers is controlled by the locking bolt and is admitted

Abstract: In a camshaft adjuster having a 4/2-way valve which rotates with the camshaft and includes a hydraulic control valve with a hydraulic control spool or piston, which is actuated in a control cylinder against the force of a compression spring between two end stops by a magnet armature of an electromagnet which is fastened to a control casing, the electromagnet is a repelling proportional magnet, whose magnet armature is seated fixedly on an armature plunger whose free end face is in contact with the control spool or with a part fixedly connected to the latter for moving the control spool against the force of the compression spring to actuate the hydraulic control valve so as to control fluid admission to the camshaft adjuster, the working stroke of the electromagnet exceeding that of the control spool.