The present disclosure relates to a cam phase adjuster that includes a stator, a rotor, a front cover and at least one locking pin. The cam phase adjuster is provided with a plurality of compartments formed between the rotor and the stator, and each compartment is divided into advance cavities and retard cavities in a circumferential direction; each locking pin is mounted in a corresponding mounting hole of the rotor; an end portion of each locking pin that faces away from the front cover abuts against the bottom of the corresponding mounting hole by means of a corresponding elastic reset member; an end face of the front cover that faces the rotor is provided with at least one locking groove which matches the at least one locking pin; the end portion of each locking pin that faces the front cover can be axially inserted into the corresponding locking groove; and the front cover is provided with an unlocking flow channel which fluidly connects the corresponding locking groove to one advance cavity or retard cavity.

A camshaft adjusting device including a vane cell adjuster and a central locking device (26) for locking the rotor (17) with respect to the stator (16), wherein at least one first valve functional pin (46) is provided in the rotor hub (30), and the working chambers (20, 21, 22, 23) with different directions of action can be fluidically connected to one another via said valve functional pin, in a first switch position, the first valve functional pin (46) fluidically connects at least two first working chambers (20, 21) with different directions of action to each other via a non-return valve (9, 10) during a movement from the direction early or late into the central locking position, in a second switch position, the first valve function pin (46) fluidically separates the at least two first working chambers (20, 21) with different directions of action, a bridging line (50) is provided for a fluid-free connection of the two first working chambers (20, 21), and the bridging line (50) can be switched by a valve pin (45).

A vane-type, hydraulic cam shaft adjuster (1, 20) having a stator (2) and a rotor that is rotatably mounted in relation to the stator (2), wherein at least one locking bolt (10) is provided in order to limit the rotor in relation to the stator (2), in at least one direction of rotation, when the locking bolt is brought into contact with a slot guide (12) of an insert part (4, 21), wherein the insert part (4, 21) is secured in a component (2) that is secured to the stator, wherein the insert part has securing regions, between which securing regions and the component (2) that is secured to the stator there is frictional connection, and wherein the insert part (4, 21) is formed, in terms of material and geometrics, in such a way that a deformation (19) causes a change in length (18) of the insert part (4, 21), involving the friction connection.

Lock pin (71) is disposed movably in axial direction in accommodation hole (70) formed at vane rotor (12). Top end portion of lock pin (71) is fitted into lock hole (23) provided at housing (11), then relative rotation position of vane rotor (12) is restrained at predetermined lock position. Vane rotor (12) is provided with small diameter portion (84) and large diameter portion (85) which are formed alternately in circumferential direction. Large diameter portion (85) extends in circumferential direction so as to cover lock hole (23). First vane (36A) protrudes from outer periphery of large diameter portion (85) to radially outer side. At least a part of lock pin (71) and at least a part of accommodation hole (70) overlap with large diameter portion (85), and are located at position that overlaps with area (86) formed by elongating first vane (36A) to radially inner side.

A controller for an internal combustion engine includes: a failure determination section which determines a failure state in a case where a relative rotation phase of an intake side valve opening and closing timing control mechanism does not change when controlling the mechanism after starting the driving of a starter motor and trying to change the relative rotation phase of the mechanism in a start control for starting an internal combustion engine. When the section determines a failure, the controller performs at least one of an intake air amount increase control in which an opening degree of a throttle valve is increased, an ignition timing advance angle control in which injection of fuel is performed at a timing earlier than a set timing and ignition is performed, and a multi-injection control in which the fuel is injected immediately before the ignition in addition to the fuel injection in an intake stroke.

In a valve timing control system, a control command unit includes: a first stage setting block and a next stage setting block. The first stage setting block sets a retard holding command value as a control command value to introduce hydraulic fluid to each retard operation chamber under a state where a rotation phase is locked, to start applying an operation pressure more than or equal to an unlock pressure to a lock component. The next stage setting block sets an advance holding command value as a control command value to introduce hydraulic fluid to each advance operation chamber, after setting the retard holding command value, to maintain the applying of the operation pressure more than or equal to the unlock pressure to the lock component.

A system including a phaser with a first lock pin and a second lock pin in the rotor assembly. The first and second locks pins having a locked position where they engage a recess in the housing assembly and an unlocked position in which they do not engage the housing assembly. The first lock pin locks the rotor assembly to the housing assembly when the phaser is in or near an intermediate phase angle position. The second lock pin locks the rotor assembly to the housing assembly when the phaser is at a full retard position. Alternatively, the second lock pin can lock the rotor assembly to the housing assembly when the phaser is at a full advance position. The second lock pin is spring biased towards the unlocked position and is pressurized to engage and move to the locked position by either the advance or the retard chamber.

The disclosure relates to a camshaft adjustment system comprising a hydraulic camshaft adjuster having a stator and a rotor forming at least one working chamber. The at least one working chamber is divided into a first sub-chamber and a second sub-chamber. The sub-chambers interact with a control valve controllable via a first actuator. When the first sub-chamber undergoes a volume increase, the rotor is displaced into a late position relative to the stator, and when the second sub-chamber undergoes a volume increase, the rotor is displaced into an early position relative to the stator. A second actuator actuated independently of the first actuator is provided. In order to release the camshaft adjuster from the late position when in an operating state, a ram of the second actuator displaces a locking pin of a late-locking device of the camshaft adjuster out of its position that locks the late position.

A hydraulic vane-type camshaft adjuster, having a stator and a rotor arranged therein such that the rotor can rotate during control mode, wherein the rotor and the stator form at least two working chambers and are separated by a vane. A locking pin immobilizes the rotor in a rotationally fixed manner in relation to the stator wherein the locking pin is connected to an active accumulator, which deflects the pin if required. The active accumulator is arranged below a rotation axis on a camshaft. A method is also provided.

A control valve is configured to reduce an axial length of a device as much as possible, thereby improving its mountability. The valve is equipped with a valve body functioning as a cam bolt for connecting a vane rotor to one end of a camshaft, a sleeve fixed to an inner peripheral surface of the valve body, and a spool valve element axially slidably housed in the sleeve for switching between supply and discharge of working fluid to and from each of a phase-retard working chamber and a phase-advance working chamber. The valve body has a male screw part formed on an outer peripheral surface and screwed into a female screw part formed in a cam bolt hole. The position of formation of the male screw part and the position of the spool valve element are arranged to overlap with each other in an axial cross-section.