A valve opening and closing timing control apparatus includes: a driving side rotor synchronously rotating with a crankshaft of an engine; a driven side rotor disposed coaxially with the driving side rotor and synchronously rotating with a camshaft in the internal combustion engine; a fluid pressure chamber formed on at least one of the driving side and driven side rotors, and partitioned into advance angle and retard angle chambers; a bolt disposed coaxially with a rotary axis of the driven side rotor, connecting the driven side rotor and the camshaft, and including a cylindrical portion coaxial with the rotary axis; and a partition body including a press-fit portion press-fitted into the cylindrical portion, and partitioning the cylindrical portion into first and second flow passages for use for feeding and discharging working fluid to and from the fluid pressure chamber, wherein the press-fit portion is provided with a cutting portion.

A control device has two modes as control modes of an electric power supply to an electromagnetic solenoid, which are used when a first determining unit determines that a difference between a sensed value of a phase and a target value of the phase exceeds a permissible range. One of the modes is a special mode that is used when a second determining unit determines that the sensed value of the phase reaches a threshold value. Another one of the modes is a normal mode that is used when the second determining unit determines that the sensed value of the phase does not reach the threshold value. In the special mode, the control device controls supply of the electric power to the electromagnetic solenoid in such a manner that an opening degree of an advancing port is larger than the opening degree of the advancing port in the normal mode.

A camshaft adjusting device, wherein said camshaft adjusting device has a lubricant supply unit, wherein the lubricant supply unit has a filter device for filtering the lubricant, wherein the filter device has at least one lubricant inlet, at least one lubricant outlet and at least one filter path, wherein the lubricant inlet and the lubricant outlet are fluidically connected to each other by way of the filter path, and wherein an output shaft of the camshaft adjusting device has two wall sections, wherein the at least one filter path is configured in a filter volume between the two wall sections, and wherein the lubricant inlet is at a smaller distance from the axis of rotation than the lubricant outlet, and the filter path extends at least in sections in the radial direction with respect to the axis of rotation.

An electromagnetic valve for a hydraulic system for an automatic transmission of a vehicle. An armature chamber is filled with hydraulic medium and fluidically connected to hydraulic lines of the hydraulic system. An armature is mounted in the armature chamber such that its stroke is adjustable. The armature includes a shut-off body and divides the armature chamber into an opening-side chamber facing the flow opening and into an inner chamber facing away from the flow opening. During a stroke of the armature, an oil exchange occurs, and a displacement volume of the hydraulic medium overflows from the opening-side chamber into the inner chamber. A hydraulic line leading to the opening-side chamber or to the inner chamber of the armature chamber includes a dirt collecting element that is designed as a permanent magnet and that retains contaminations in the hydraulic medium that flows through the hydraulic line during an oil exchange.

An electromagnet for a hydraulic system, such as an automatic transmission of a motor vehicle. The electromagnet may include an armature chamber filled with hydraulic medium, which may be fluidically connected to hydraulic lines of the hydraulic system, and may have an armature mounted therein. The armature may have an adjustable stroke and may include a shut-off body. The armature may divide the armature chamber into an opening-side chamber facing the flow opening, and an inner chamber facing away from it. During a stroke movement of the armature, an oil exchange may occur, during which a displacement volume of the hydraulic medium overflows from the opening-side chamber into the inner chamber. The electromagnet may further include a hydraulic medium reservoir, which may store a hydraulic medium having a higher degree of purity than the hydraulic medium in the hydraulic lines and which may be fluidically connected to the opening-side chamber.