A control valve includes a valve housing extending along a longitudinal axis. The valve housing defines an inlet port, a first outlet port, and a second outlet port. In addition, the control valve includes a spool guide disposed inside the valve housing and a flow guide belt disposed around the spool guide. The flow guide belt is disposed inside the valve housing. The control valve further includes a spool movably disposed in the spool guide. The spool can move relative to the valve housing along the longitudinal axis between a first spool position and a second spool position. The first outlet port is in fluid communication with the inlet port when spool is disposed in the first spool position.

A friction shim is configured to generate a frictional force between a first shim contact surface of the friction shim and a shaft end surface of a driven shaft and a frictional force between a second shim contact surface of the friction shim and an opposing surface of a second rotatable body after installation of a valve timing regulator to the driven shaft. A contact member has a first member contact surface configured to contact the shaft end surface. The contact member is installed to the second rotatable body such that the first member contact surface contacts the shaft end surface before occurrence of contact of the first shim contact surface to the shaft end surface at a time of installing the valve timing regulator to the driven shaft.

A control valve assembly of a variable cam timing phaser of a variable cam timing system, with the variable cam timing phaser including a housing and a rotor, and with the variable cam timing system including a camshaft, includes a valve housing extending along an axis. The valve housing includes a threaded portion adapted to engage the camshaft, and a body portion spaced axially from the threaded portion. The body portion defines a body interior. The control valve assembly also includes a piston disposed in the body interior and moveable along the axis between a first position and a second position. The control valve assembly further includes a cap removably coupled to the body portion of the valve housing. The cap includes a torque driving element configured to be received by a tool for transmitting torque from the tool for fixing the cap to the body portion.

At a time of a startup in a non-lock state (at the time of a next startup in a case where an internal combustion engine is stopped in a non-lock state in which a VCT phase is not locked in an intermediate lock phase), it is determined whether or not the engine can be started up by most delayed startup processing. In a case where it is determined that the engine can be started up by the most delayed startup processing, the most delayed startup processing is performed. In this most delayed startup processing, the engine is cranked in a high rotation range not less than a specified rotation speed and a fuel injection and an ignition are started in a state in which the VCT phase is controlled to a vicinity of the most delayed phase (most delayed phase or within a specified range from the most delayed phase) to thereby start up the engine. In this way, at the time of the startup in the non-lock state, the engine can be quickly started up without locking the VCT phase.

A control system for varying cylinder valve timing of an internal combustion engine is provided. The control system includes a cam phase actuator having first and second actuator ports to adjust a rotational phase of a camshaft relative to a crankshaft, a first control valve, a second control valve, and a dynamic regeneration valve. In one embodiment, the dynamic regeneration valve is configured to enable the cam phase actuator to switch between operating in an oil pressure actuated mode and a cam torque actuated mode when adjusting the rotational phase of the camshaft relative to the crankshaft.

An arrangement of an electromagnet (6) for controlling a central valve (2) is provided. A thrust pin (4) is coupled to the electromagnet (6) and can be moved along a first axis (A) in such a way that a control piston (1) of the central valve (2) can be displaced along a second axis (B) in a central valve housing (8) by the movable thrust pin (4). The first axis (A) of the thrust pin (4) extends parallel to and at a radial spacing (10) relative to the second axis (B) of the control piston (1).

A valve opening and closing timing control device includes: a drive-side rotary body rotating synchronously with a crankshaft; a driven-side rotary body provided inside the drive-side rotary body coaxially and rotating integrally with a camshaft; advance and retard chambers formed between the drive-side and driven-side rotary bodies; a lock mechanism switchable between a lock state and a lock release state; a valve unit including a fluid supply pipe into which fluid is supplied and a spool movable along a direction of the rotation axis, and controlling supply of the fluid to and from the lock mechanism, and the advance and retard chambers; and a tubular valve case having an internal space inside the driven-side rotary body and housing the valve unit in the internal space. A first opening portion is formed in the fluid supply pipe. A second opening portion is formed in the valve case.

A control device according to an embodiment includes a driving unit that supplies, to a control target, a current or a voltage on which an Alternating-Current (AC) component is superimposed, an Analog-to-Digital (AD) converter, and an AD conversion controller. The AD conversion controller causes, in an AC cycle of the AC component, the AD converter to execute a first AD conversion in synchronization with a starting timing of the AC cycle, and then to execute second and subsequent AD conversions at predetermined time intervals in response to a trigger by an internal timer of the AD converter.

An electromagnetic adjusting device having a first, second and third plug contacts for operating the adjusting device on an operating voltage source having a first and second voltage pole. The device can include an actuator coupled to the plug contacts. The actuator can have a magnet coil with a first terminal connected to the first plug contact, a second terminal connected to the second plug contact, where either the first or the second plug contact is connected to the first voltage pole. The magnet coil can also have a first transistor with a first control electrode connecting the first terminal to the third plug contact, a second transistor having a second control electrode connecting the second terminal to the third plug contact, a first resistor connecting the first control electrode to the second plug contact and a second resistor connecting the second control electrode to the first plug contact.

A valve opening and closing timing control apparatus includes a driving-side rotating body, a driven-side rotating body fixed to a camshaft by a bolt, a fluid pressure chamber, an intermediate lock mechanism, a lock flow passage bringing the working fluid to the intermediate lock mechanism, and an electromagnetic valve including a spool which is arranged at an inner portion of the bolt, the lock flow passage including a first flow passage which is arranged between the spool and a supply flow passage in a radial direction and which is connected to the supply flow passage, the lock flow passage including a second flow passage which is provided at the inner portion of the bolt in a penetrating manner in the radial direction and which brings the working fluid to flow between the spool and the intermediate lock mechanism.