Abstract: A cam drive apparatus comprising a magnetic gear adapted to communicate rotational movement between a crankshaft and a cam shaft, wherein said magnetic gear comprises an outer member comprising a plurality of circumferentially spaced magnet means, said outer member being mounted for rotation with one of said crankshaft and camshaft, an inner member comprising a plurality of circumferentially spaced magnet means, said inner member being concentrically arranged within said outer member to define an annular gap therebetween, and an intermediate member comprising a plurality of circumferentially spaced ferromagnetic pole pieces located within said annular gap between said inner and outer members and being mounted for rotation with the other of said crankshaft and camshaft.

Abstract: A device for controlling a phase of a cam shaft in an internal combustion engine has a structure which can return a phase of a cam shaft to an intermediate position on the basis of its own power by utilizing a variable torque applied to a cam shaft at a time of starting an engine so as to lock, and has a high practicability and mass production performance.

Abstract: A device for adjusting the position of the angle of rotation of the camshaft of a reciprocating piston internal combustion engine relative to the crankshaft in a motor vehicle is provided, which includes an adjusting gear mechanism in the form of a triple shaft gear mechanism having a drive shaft fixed to the crankshaft, an output shaft fixed to the camshaft and an adjustment shaft which is drivingly connected to an electric motor which can be positioned using an electric control device. The ignition of the internal combustion engine is connected to the motor vehicle battery via an ignition switch. The motor vehicle also includes at least one device which can be adjusted by a user of the vehicle. A monitoring circuit provided with at least one sensor for detecting a change of state of the at least one device. The monitoring circuit is connected to the control device when the latter is switched off, such that the control device is switched on when a change in state is detected.

Abstract: A first rotor integrally fixes a housing having the bearing of a camshaft, a case, which internally has a plurality of projecting shoes and which forms hydraulic chambers between these shoes, and a cover, which covers the hydraulic chambers, and the first rotor rotates integrally with a crank shaft. A second rotor has a plurality of vanes each dividing the hydraulic chamber into an advanced-angle hydraulic chamber and a retarded-angle hydraulic chamber, can rotate by a predetermined angle within the first rotor, and is integrally fixed with an intake or exhaust camshaft. A groove accommodating an energizing part, opposed to the shoe of the first rotor and to the vane of the second rotor, is provided on the opposite side to the housing.

Abstract: In a camshaft adjusting device comprising a locking unit provided for locking an adjustment function component in at least one position relative to a camshaft drive component wherein at least two locking structures are provided which each have at least one locking surface for mutual engagement, each locking structure surface is formed by an at least substantially planar area which is inclined with respect to the direction of movement, the locking unit providing for a play-free engagement between the camshaft drive component and the adjustment function component.

Abstract: A camshaft phaser comprising first and second harmonic gear drive (HD) units disposed in back-to-back relationship. Each HD includes an elliptical wave generator (WG), a flexspline (FS) deformable by the WG, and a circular spline (CS) for engaging the FS. A dynamic spline (DS) connects the first and second FSs. The first HD is an input HD driven by an engine crankshaft via a sprocket wheel connected to the input CS. The second HD is an output HD driving an engine camshaft. The DS is meshed with both the input FS and the output FS. The phase relationship between the crankshaft and the camshaft may be changed by changing the angular relationship between the first and second WGs. Such change is effected by holding the first WG stationary and varying the angular position of the second WG via an electric motor.

Abstract: A valve timing controller is provided with a first rotary element that rotates in response to a crankshaft, a second rotary element that rotates in response to a camshaft. Multiple link mechanisms are arranged adjacently in the rotational direction of the first rotary element to change a relative rotation phase between the first and second rotary elements. The link mechanism in each group is constituted by combining the first link linked to the first rotary element by a revolute pair with the second link linked to the second rotary element and the first link. The second link of the link mechanism in each group retains the first link of each of the link mechanisms in the same group and the other group in the rotational axis direction of the first rotary element between the second link and the first rotary element.

Abstract: A hydraulic control system for an internal combustion engine, includes a driven mechanism driven by hydraulic pressure fed through a flowing passage change-over valve. The flowing passage change-over valve includes a valve body formed with a plurality of ports which are respectively communicated with the supply passage and the oil passage, and a spool valve body slidably disposed in the valve body to open and close the plurality of ports, the ports including a supplying port communicated with the supplying passage. The maximum cross-sectional area of the supplying port is larger than a minimum cross-sectional area of the supplying passage. The flowing passage change-over valve is supplied with electric current to heat hydraulic fluid kept in the flowing passage change-over valve so as to lower a viscosity of the hydraulic fluid.

Abstract: An output shaft of an internal combustion engine and an input shaft of a transmission are coupled to each other via a damper device. The damper device includes a housing and a rotary member that rotate relative to each other to damp the torsional vibration of the output shaft, and transmits the rotational force of the output shaft to the input shaft and damps the torsional vibration of the output shaft. The rotary member is fitted to a hub from outside. The output shaft is fixed via a flywheel to the housing for rotation together therewith, while the input shaft is fitted in a fitting hole formed in the hub.

Abstract: In a vane-type camshaft phaser, one vane extends over a much larger internal angle than the other two vanes. Because of its size and strength, the large vane is the vane designated for contact with the stator. The other vanes and lobes have extra clearance to prevent contact regardless of rotor position. In one embodiment, a first surface of the large vane engages a surface of a first adjacent lobe at one extreme rotor rotation, and a second surface of the large vane engages a surface of a second adjacent lobe at the opposite extreme of rotation. The contact surfaces of the lobes and the vane may be equipped with hardened wear pads. One or more wear pads may be machined to provide a desired rotor displacement angle.

Abstract: A mechanically-actuated camshaft phaser for varying the phase of a camshaft in an internal combustion engine. The phaser comprises two colinear helical mechanisms having opposite-handed helices engaging a common nut for common rotation. One helical mechanism is operatively attached to a sprocket or pulley in time with an engine crankshaft. The other helical mechanism is operatively attached to an engine camshaft. A motive system drives the nut axially of itself along the helical mechanisms, causing a phase shift between the mechanisms and hence between the crankshaft and the camshaft. The preferred helical mechanisms are ball screws, and the preferred motive system is a worm gear driven by a worm on the shaft of an electric motor.

Abstract: A valve timing controller is disclosed that includes first and second rotating elements, and a phase changing mechanism including arm members coupling the first and second rotating elements. The valve timing controller also includes a cam plate and a stopper to restrict rotation of the cam plate. A concave part where the stopper and the cam plate contact. Also, a damper chamber is defined between the concave part and one of the stopper and the cam plate.

Abstract: The invention relates to a device (101) for varying the control times of gas exchange valves of an internal combustion engine, with a hydraulic actuation device (102) and with a control valve (103). The device (101) according to the invention is provided with mid-position locking of a hydraulic actuation device (102). Furthermore, the device (101) according to the invention ensures that, in the event of the failure of an actuation unit (112) which regulates the control valve (103), the hydraulic actuation device (102) is locked in the mid-position and the lock is maintained until the actuation unit (112) is repaired. Furthermore, the device (101) according to the invention makes it possible to start the internal combustion engine in a position locked in a mid-position, without a movable element (105) of the hydraulic actuation device (102) butting against a side wall of a pressure space (104) when the internal combustion engine is started.

Abstract: A camshaft adjuster (1) for an internal combustion engine is provided, in which the relative angular position between a driving gear (2) and an output element that is allocated to the camshaft can be adjusted by hydraulically impinging pressure chambers located between an inner and outer rotor. The outer rotor and the gear ring of the driving gear (2) are joined to each other via fastening elements (15). In order to create a particularly compact camshaft adjuster (1), the fastening elements are located at least in part at a distance from the longitudinal axis of the camshaft adjuster (1) which is smaller than the external radius (35) of the pressure chambers.

Abstract: A method for adjustment of the relative angle of rotation between a camshaft and a crankshaft in an internal combustion engine through an electromechanical phase adjuster is provided. The invention provides a rapid and precise adjustment behavior. To that end, a deviation of the adjustment speed (??) between a desired adjustment speed (?SOLL) and an actual adjustment speed (?IST) is calculated from at least one measurement parameter in a second control loop cascaded below the first control loop. An output parameter is calculated dependent on the deviation of the adjustment speed (??) through an adjustment speed adjuster (26) cascaded below the angle of rotation adjuster (23), with the output parameter being used to adjust the angle of rotation (?) using an electromechanical actuator (14). The relative angle of rotation can be rapidly and precisely adjusted by adjusting the adjustment speed. A phase adjuster for controlling the relative angle of rotation is also provided.

Abstract: A driving-side rotatable body includes a driving-side inner gear, which has an axial extent that does not overlap with an axial extent of a driven-side inner gear of a driven-side rotatable body. A driven-side outer gear and a driving-side outer gear of a planet gear are meshed with and are driven together with the driven-side inner gear and the driving-side inner gear, so that the planet gear changes a relative rotational phase between the driven-side rotatable body and the driving-side rotatable body. The driven-side rotatable body supports the driving-side rotatable body from a radially inner side of the driving-side rotatable body at a location, which is radially outward of the driven-side inner gear.

Abstract: In an adjusting mechanism which is connected to first and second camshafts of a camshaft drive arrangement including a control device for adjusting the phase position of at least one of the camshafts relative to a crankshaft of an internal combustion engine, and having a drive device for driving the camshaft arrangement, a first partial mechanism for driving the first camshaft and a second partial mechanism for driving the second camshaft are provided so as to be driven in parallel by means of a common drive device for adjusting the angular position of the first and second camshafts relative to the crankshaft of the engine.

Abstract: A camshaft phaser control system for reducing rotor positional instability. A phaser system includes a target wheel mounted on the phaser rotor such that during camshaft rotation wheel teeth chop a signal to generate first and second interruption signals indicative of amplitude of rotor instability. An instability monitor is used to monitor the level of instability against predetermined acceptable levels, depending upon engine operating conditions (RPM, temperature). An excessive level of instability is established by engine calibration. When measured instability exceeds a predetermined threshold level for a predetermined period, an instability diagnostic becomes alarmed. A default strategy is used to correct the excessive instability by applying a bias to the phaser control duty cycle. The system continues to monitor the level of instability, and when instability falls below the threshold limit, normal phasing operation is resumed.

Abstract: A valve timing system for an internal combustion engine includes a phase alteration mechanism interposed between a driving rotator and a driven rotator and having a direction turning point at which the phase alteration direction is reversed when a movable portion of the mechanism travels from a beginning to a termination, and an operation control device for displacing the movable portion when undergoing an energization control, the movable portion being displaced toward the beginning when the energization control fails to be carried out. The rotation phase is set at a middle position between a maximum retard position and a maximum advance position when the movable portion is located at the beginning.

Abstract: An abnormality diagnosis system 100 includes a VVT controller 110, an adjustable valve mechanism 120, a cam angle sensor 130, a model computation module 140, an abnormality detection module 150, and an alarm lamp 160. The adjusable valve mechanism 120 advances or delays a phase angle of an intake cam shaft relative to a crankshaft, thereby varying an open-close timing of a valve. The model computation module 140 computes a physical behavior of the adjustable valve mechanism 120 according to a physical model, in response to a control signal input from the VVT controller 110. The abnormality detection module 150 determines whether the adjustable valve mechanism 120 is abnormal or normal, based on a difference between a theoretical value of phase angle calculated according to the physical model and an observed value of phase angle measured with the cam angle sensor 130. The arrangement of the invention ensures highly accurate abnormality diagnosis of the adjustable valve mechanism 120.

Abstract: Camshaft adjusters according to the swivel motor principle may be provided with a bar which arrests the rotor in a position relative to the stator. A bar according to the invention is provided with two portions, between which a change of power transmission takes place during the arresting process.

Abstract: A drive shaft assembly to interconnect a driving component and a driven component has a first shaft and a second shaft operably engaged with the first shaft to enable torque transmission and relative axial sliding motion. A joint component operably interconnects one of the first and second shafts to one of the driving and/or driven components. The joint component is rotatable through a specified range of rotation, or “free-motion”. The joint component is axially fixed relative to one of the second shaft, driving component and/or the driven component.

Abstract: A variable valve timing control apparatus of an internal combustion engine includes a drive rotary member, a driven rotary member, and a phase-change mechanism disposed between the drive and driven rotary members. The phase-change mechanism changes a relative phase between the drive and driven rotary members by an operating force, and returns the relative phase to an engine start-up phase suitable for the engine start-up at the engine starting. The phase-change mechanism has a phase-change characteristic that a phase-change rate reduces near the engine start-up phase when the relative phase is returned to the engine start-up phase.

Abstract: A variable valve timing control device includes a housing member, a rotor member assembled to the housing member so as to be rotatable relative thereto and including vane portions each forming an advanced angle chamber and a retarded angle chamber within the housing member, a stopper formed on the convex portion for restricting a relative rotation between the housing member and the rotor member, a lock mechanism for restricting the relative rotation by a lock member, and a fluid pressure circuit for controlling an operation oil to be supplied to or discharged from the advanced angle chamber, the retarded angle chamber, and the lock mechanism. When the relative rotation is restricted, the lock member is in contact with an inner peripheral face of the receiving hole on the advanced angle side and the retarded angle side between an opening portion and a bottom portion of the receiving hole.

Abstract: A valve timing control apparatus includes a driving side rotational member, a driven side rotational member formed with a plurality of recessed portions into which a supporting jig is insertable at a second side thereof in the axial direction, a fluid pressure chamber, a vane, a lock member, and a cover plate formed with a plurality of through holes, through which the supporting jig is insertable, at a position in which each of the plurality of through holes is overlapped with each of the plurality of recessed portions of the driven side rotational member in a condition where the relative rotational phase is restrained at the lock phase.

Abstract: In a sealing element, in particular for forming a seal between an impeller or rotary piston of a pivoting motor and a component surrounding the impeller, wherein the sealing element includes a base body with a first spring element integrally formed on a basic body for generating a first sealing pressure force, the basic body has an inner space to which a pressure medium is admitted in order to generate a second sealing pressure force intensifying the first sealing pressure force.

Abstract: A device (1) for changing the timing of an internal-combustion engine (2) is provided that has a camshaft adjuster (5), which is supported on a non-rotating bearing journal (6). A driving wheel (8) of the camshaft adjuster (5) is driven by a crank-shaft (3) via a first traction mechanism drive (7). The rotation of the driving wheel (8) is transferred via an actuator (10) to a driven part (9), which is arranged so that it can rotate relative to the driving wheel (8). Second and third traction mechanism drives (11, 12) create a drive connection between the driven part (9) and two camshafts (4, 4a).

Abstract: A friction resistance generation mechanism is disposed between two relatively rotatable members of a rotating mechanism. The mechanism includes an input side disk-like plate 32, output side disk-like plates 30 and 31, friction shims 361A, 361B, and 361C aligned and disposed in a direction of rotation. A plurality of elastic members is disposed among the friction shims in the direction of rotation.

Abstract: A remote-controlled device for rotating tools, preferably medical tools, comprising a hollow body (1) which is embodied in the form of pivotally connected proximal and distal parts (2, 6) provided with a pair of adjacent end surfaces (5, 5?) which are angularly disposed with respect to the longitudinal axis of the body (1), and an axis (7) which is perpendicularly oriented with respect to the end surfaces (5, 5?) and provided with a central channel and a remote control mechanism. A shaft (10) arranged in the central channel of the device comprises driven, driving and transmitting sections (11, 12, 13) respectively, and operates as a link for transferring working rotational motion at a variable angle. The tilt angle between the distal part (6) and the longitudinal axis of the proximal part (2) can be equal to 180°.

Abstract: A valve timing adjusting apparatus has a housing and a vane rotor to form multiple fluid chambers, and a relative position of the vane rotor to the housing is adjusted by the fluid pressure supplied into the fluid chambers. A check valve is provided in a branched passage portion, so that working fluid may not be pushed out from an advancing fluid chamber to a low pressure side, even when the working fluid in the advancing fluid chamber is temporally compressed to increase its fluid pressure due to a torque change applied from a cam shaft to the vane rotor.

Abstract: Camshaft adjusters are provided for changing the position of a camshaft of an internal combustion engine. One such camshaft adjuster has a locking position that, with regard to design, is freely selectable.

Abstract: Camshaft adjusters which work in accordance with the operating principle of a hydraulic oscillating motor comprise at least two components arranged parallel to one another. Frequently, the two components are a covering plate and a stator. The two components are connected by fasteners which penetrate through one of the two components. At least one of the fasteners is equipped with a central, deformable pin which, in the obstructed state, impedes the nondestructive separation of the two components arranged parallel to one another.

Abstract: A twin vane-type phaser is described which is provided with a locking mechanism for locking the drive member to the driven members when the pressure in the working chambers is a below is predetermined value. The locking mechanism comprises two coaxial locking pins 114, 118 mounted in a common bore 110 in the centrally located member 32. The locking pins are resiliently urged apart by a spring 120 into bores in the two outer members 38, 40 and are retracted by pistons 112, 116 when the hydraulic pressure in the working chambers attains the predetermined value.

Abstract: A power coupling device including a driving coupler mounted in the driving unit having a first connection part and a first positioning part; and a driven coupler mounted in the driven part having a second connection part and a second positioning part, respectively. The driven coupler having a first coupler member fixed to the driven part; a second coupler member having the second connection part and the second positioning part for connection with the first coupler member; and a connection for connecting the first coupler member with the second coupler member to control the connecting position. The connection means has a plurality of projections formed at one of the first and the second coupler members; and a plurality of depressions formed at the other one of the first and the second coupler members.

Abstract: The invention relates to a device (101) for altering the control times of gas exchange valves of an internal combustion engine, having a hydraulic actuating device (102) and a control valve (103). The device (101) according to the invention is provided with centre-position locking of a hydraulic actuating device (102). Furthermore, the device (101) according to the invention ensures that if an actuating unit (112) which governs the control valve (103) fails, the hydraulic actuating device (102) is locked in the central position and the locking is maintained until the actuating unit (112) is repaired. Furthermore, the device (101) according to the invention allows the internal combustion engine to be started in a locked position in a central position without a moveable element (105) of the hydraulic actuating device (102) striking a side wall of a pressure space (104) when the internal combustion engine is started.

Abstract: A valve timing adjusting apparatus for an engine comprises a housing unit and a vane rotor rotatably housed in the housing unit. The housing unit comprises a front plate, a shoe housing and a sprocket, wherein those elements are fixed to each other. A position determination pin is inserted through a through hole formed in the shoe housing and into a tapered hole formed in the sprocket, to position the shoe housing at a desired position with respect to the sprocket. Since a forward end of the position determination pin is brought into contact with an inner surface of the tapered hole, the positioning of the shoe housing with respect to the sprocket can be surely attained.

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: An adjustable camshaft system for an automotive engine includes a camshaft having machined and fabricated axially-directed control passages combined with an oil-activated camshaft phaser. The fabricated oil control passages are formed within a portion of the camshaft having an outside diameter which is substantially equal to the outside diameter of other portions of the camshaft fitted within bearings carried within the engine's cylinder head.

Abstract: To operate a steplessly adjustable camshaft control device, particularly reliably and safely, an adaptation of the camshaft and the crankshaft is performed so that a phase angle (actual value) of the camshaft to the crankshaft is determined, the phase angle is monitored while operating the internal combustion engine and the camshaft control device is controlled as a function of a variable setpoint value so that the phase angle is equivalent to the setpoint value.

Abstract: When a first damper contacts both of a protruding portion of a pulley body and a protruding portion of a center hub, a second damper is disposed as being apart from the protruding portion of the center hub with a gap. Even when the pulley body is rotated in a reverse direction, no reverse torque is thereby transmitted to the center hub as long as the gap exists, or before the second damper contacts the protruding portion of the center hub. As a result, torque fluctuation is sufficiently absorbed. This prevents the following: a reverse torque is transmitted to the center hub; a torque limiter wrongly acts; a fastening part between a shaft and the center hub loosens; or abnormal noise or aversive vibration takes place.

Abstract: An adjusting device for the rotational position of the camshaft of a reciprocating piston engine relative to the crankshaft, has an actuator for adjusting the rotational position that is connected into a control circuit. The control circuit has a controller, which is linked to a data memory, in which controller coefficients for a transfer function of the controller are stored. The data memory has at least two memory areas in which various sets of controller coefficients are stored. The control circuit is connectable with the aid of a mode selector, optionally or alternately, in such a way to one of the data memory areas that the controller coefficient set stored in the particular data memory area is used for the control. A device for ascertaining the operating state of the adjusting device and/or of the reciprocating piston engine is connected to the mode selector in such a way that the controller coefficient set used in the particular case for the control is dependent on the operating state.

Abstract: A valve timing control apparatus for controlling an opening and closing timing of a valve of an internal combustion engine includes a driving side rotational member synchronously rotated with a crankshaft, a driven side rotational member provided coaxially with the driving side rotational member and synchronously rotated with a camshaft, a fluid pressure chamber being separated into an advanced angle chamber and a retarded angle chamber, a phase control apparatus for displacing a relative rotational phase between the driving side rotational member and the driven side rotational member, a locking mechanism having a movable member, a judging device for judging a supply condition of the operation fluid relative to the fluid pressure chamber, and a control device for controlling a rotational speed of the crankshaft.

Abstract: In a hydraulic camshaft adjuster for a camshaft of an internal combustion engine, with an inner body connected for rotation with the camshaft and having at least one vane extending into a chamber formed in an outer body mounted rotatably relative to the camshaft and connected for rotation with a crankshaft for driving the camshaft and with a hydraulic control mechanism for adjusting the relative angular position between the inner and the outer bodies and including a locking structure for selectively locking and releasing the inner body with respect to the outer body, at least one bolt is slidably supported in an opening in the inner body so as to be movable into a guide slot in the outer body by the force of an axially acting spring element, said bolt when released from the guide slot against the axially acting spring force by the pressure force of a hydraulic operating fluid being retainable laterally displaced out of alignment with the guide slot by centrifugal forces against the force of a radially acting

Abstract: A phaser comprising a housing, a rotor, and first and second passages. The housing has at least one chamber defined by an advance wall, an arcuate outer wall, and a retard wall. The rotor has at least one vane projecting from an outer circumference, separating the chamber in the housing into advance and retard chambers. The first passage facilitates fluid communication to a first port in the advance or retard chamber and a second passage to a second port in the other advance or retard chambers. Each port is spaced apart form the first wall or second wall of the vane, such that when the vane is moved towards the advance or retard wall of the chamber far enough, the passages are obstructed by the housing and fluid flow to the passages is restricted, such that impact of the vane with the walls of the chamber is cushioned.

Abstract: A vane-type camshaft adjuster having a stator, and a rotor connectable to a camshaft. The rotor has a plurality of radially protruding blades inserted in respective blade grooves. The blade groove has groove side faces, a groove bottom and rounded transition regions between the groove side faces and the groove bottom. The transition regions undercut the groove side faces, wherein the rounded transition regions are configured, at least in part, as circular arc segments which undercut the groove bottom.

Abstract: A torque transmission device, for driving or in drives of agricultural implements or self-propelled working machines, has a coupling (6) with a coupling housing (7) including a connection plate (10) and a coupling hub (8). Torque transmission elements (9) are positioned between the two in at least one rotational direction for transmitting a torque between the two. A driving member (20) defines a longitudinal axis (14). The driving member (20) is provided with distributedly arranged second driving elements (22) around the circumference of and radially projecting from a driving member portion (21). Gaps (23) are formed in a circumferential direction between the second driving elements (22). A support plate (12) is present on which the driving member (20) is rotationally supported around the longitudinal axis (14). First driving elements (15), as distance holders, retain the support plate (12) at an axial distance to the connection plate (10) on the coupling housing (7).

Abstract: A valve timing control system for an internal combustion engine includes a driving member to which a rotational force is transmitted from a crankshaft. A driven member is rotatable with a cam shaft as a single member. A phase changing mechanism is disposed between the driving member and the driven member to vary a relative rotational phase between the driving member and the driven member within an angular range. A projecting member is disposed to one of side of the driving member and side of the driven member and movable forward and rearward. A contacting section is formed at the other of the side of the driving member and the side of the driven member and contactable with the projecting member when the projecting member is moved forward so as to restrict relative rotational positions of the driving member and the driven member.

Abstract: A camshaft is formed at a generally middle portion with an enlarged cylindrical portion. An annular vane member is mounted on the enlarged cylindrical portion and secured thereto by means of a nut. An annular housing or sprocket is arranged to receive therein the annular vane member in a manner to permit a rotation of the vane member relative to the annular housing. Each of a circular opening of the vane member and a circular opening of the annular housing is so sized as to permit cam lobes of the camshaft to pass therethrough.

Abstract: A control structure for the adjusting motor of an electric camshaft adjuster in an internal combustion engine is provided. The control structure includes a controller which processes measuring signals of the internal combustion engine to control data for the adjusting motor. A controller which has meaningful values for the adjusted setpoint rotational speed of the adjusting motor, even when the input differential signal has a zero value, is obtained by applying the signal of an uncontrolled rotational speed to the output signal of a controlled setpoint rotational speed.

Abstract: The invention intends to improve a response by utilizing a rotational variable torque of a cam shaft. Communication paths respectively communicating an advance hydraulic chamber and a retard hydraulic chamber provided in a second rotary member and a hydraulic connecting passage are provided so as to be communicated, at a time when a control member intending to improve a response by moving a phase angle control slider in an axial direction or a rotational direction in correspondence to an operating state such as an advance, a retard or the like so as to intermittently communicate an advance chamber communication path and a retard chamber communication path with a hydraulic chamber connecting groove only in a section in which a cam shaft variable torque in an operating direction is applied, is controlled in a rotating region, and a relative rotation of a third rotary member and the second rotary member stops.