Abstract: A variable valve timing mechanism of an internal combustion engine varies the valve timing by varying the rotation phase of the camshaft with respect to a reference rotation phase of the drive shaft of the engine. The mechanism has a first rotation member and a second rotation member. The first rotation member rotates in fixed synchronism with the drive shaft and has at least one recess therein. The second rotation member is located within the first rotation member and rotates integrally with the camshaft. The second rotation member has a vane within the recess. The vane is movable between two walls of the recess and divides the recess into first and second pressure chambers. Hydraulic fluid pressure causes relative rotation of the second rotation member with respect to the first rotation member by applying pressure to the first and second pressure chambers to move the vane. The mechanism further has a lock device.

Abstract: A progressive forging machine having automatically adjustable cam timing for transfer finger opening and closing movement and for knockout pin action. The cams can be adjusted without manual effort to thereby reduce changeover time and the level of skill required to effect a changeover. For each of the transfer finger and knockout actions, a separate cam assembly is provided with a series of cam sections that are selectively repositionable on a common shaft by appropriate operation of a corresponding series of cam stop actuators and a common clutch actuator.

Abstract: A device for the continuous variation of a relative angular position between a crankshaft and a camshaft of an internal combustion engine comprising a drive element (2) driven by the crankshaft of the internal combustion engine through a traction means, a sliding sleeve (7) which is positively locked by a first gearing (8, 9) to the drive element (2) and by a second gearing (10, 11) to a driven element (13), and an adjusting piston (6) which is fixed on the sliding sleeve (7) and guided in a housing (3) to axially delimit two pressure chambers (14, 15) which are sealed from each other by a sealing arrangement whereby a radially inward oriented sealing of the sliding sleeve (7), is achieved by providing a sealing disc (17) of continuous configuration which bears against an inner wall (19) of the sliding sleeve (7).

Abstract: A variable camshaft phase changing device comprises two axially-spaced annular gears disposed and engaged between a drive and a driven member, a plurality of coil springs compressed between the annular gears to bias one apart from the other, and an annular piston having a plurality of pins which pass through one and the other of the annular gears. The plurality of pins have heads arranged to come into driving relation with the other of the annular gears.

Abstract: A phase changing mechanism is disclosed which is applicable to a valve gear of a dual overhead camshaft internal combustion engine. The mechanism comprises a driving shaft, a cam rotatable relative to the driving shaft, a drive member fixed to the driving shaft, a driven member integral with the cam, a support, an intermediate member rotatablly supported in an eccentric circular cam integral with the support, a first coupling coupling the drive member with the intermediate member at a first position spaced from an axis of the driving shaft, and a second coupling coupling the driven member with the intermediate member at a second position angularly spaced from the first position with respect to the shaft axis. The first coupling has a movable connection with the intermediate member to permit variation in a distance of the first position from an axis of rotation of the intermediate member during operation.

Abstract: A planetary cam phaser includes an electric motor driven worm gear actuator for rotatably positioning a sun gear to vary the cam phase relative to the crankshaft of an associated engine. Preferably, the worm lead angle is made small to lock the actuator against back driving by camshaft generated forces so the phaser is actuated only by controlled motor movements. Alternatively, a return spring may be applied on the motor or worm shaft to return the phase to an initial position when the motor is de-energized or fails. In another version, the worm lead angle may be increased to permit limited back driving forces to drive the cam back to the initial position when the motor is off without the need for a return spring.

Abstract: A planetary cam phaser for varying the timing of an engine camshaft is provided with oppositely tapered teeth on the planet gear(s) and the mating ring and sun gears and biasing means for urging the mating gears axially into lash free engagement. The tapered teeth may be formed on constant pitch circles or on conical pitch circles of conical gears and the teeth of at least one of a pair of mating gears may be crowned to control loading and wear. The taper angles of the teeth and/or the conical pitch circles of the conical gears are preferably made small enough to avoid gear drive forces from developing gear separation forces greater than restraining friction forces.

Abstract: A camshaft timing device includes a camshaft 10 and a drive gear 20 rotatably mounted thereon. An interconnecting shifting shaft 30 has spline 31 and 33 that interconnect with respective splines 16 and 41 on the camshaft and a hub of a drive gear 20. Axial movement of the shaft 30 causes the shaft to rotate the camshaft 30 with respect to the drive gear 20 due to the helical nature of the splines 33 and 41. The axial movement of the shaft 30 is caused by a drive sleeve 50 connected to a pinion gear that is driven through a worm gear 63 by an electric motor 67.

Abstract: A valve operating mechanism comprises a hollow shaft (10), a sleeve journalled on the hollow shaft and having a cam, a coupling yoke (16) connected by a first pivot pin (18) to the hollow shaft (10) and by a second pivot pin (20) to the sleeve and means for pivoting the yoke (16) to effect a phase change between the hollow shaft (10) and the sleeve, wherein the means for pivoting the yoke (16) comprises an actuating rod (24) slidably received in the hollow shaft (10), a cam surface on the actuating rod (24) and a plunger (22) passing through a generally radial bore in the hollow shaft (10) to cause the yoke (16) to pivot in response to axial movement of the actuating rod (24).

Abstract: A coupling gear for transmitting rotation of a first shaft onto a second shaft has a first coupling wheel fixedly connected to the first shaft and a second coupling wheel fixedly connected to the second shaft. A third coupling wheel is driven by the first coupling wheel and a fourth coupling wheel is driven by the third coupling wheel and drives the second coupling wheel. A first coupler couples the rotational axle of the first coupling wheel and the rotational axle of the third coupling wheel. A second coupler couples the rotational axle of the third coupling wheel and the rotational axle of the fourth coupling wheel. A third coupler couples the rotational axle of the fourth coupling wheel and the rotational axle of the second coupling wheel. A control device for adjusting with a control movement the rotational phase of the first and second shafts has a control element for adjusting the angle between the first, second, and third couplers.

Abstract: Angular phase of a cam shaft of an internal combustion engine is adjusted by changing angular position of a vane rotor in a shoe housing. Each of vanes 2 has a couple of a check valve and a pilot valve which are moving members moving in parallel with the rotation axis to switch on and off oil passages. Since the moving members move in parallel with the rotation axis, the motion thereof is not affected by the centrifugal force caused by the rotation. Further, since the moving members are accommodated inside the vanes, sealing between advancing chambers and retarding chambers which are disposed opposite sides of the vanes can be ensured without increasing the size, particularly the outer diameter, of the device.

Abstract: A control member of a torque transmitting apparatus is composed of pins, a retainer, a first and a second arc-shaped gears which form a single ring gear together, a piston, first springs and second springs. The first and second arc-shaped gears are biased respectively by the first and second springs in opposite directions so that the splines of the first and the second gears are deviated from each other while they are in mesh with corresponding splines of a sprocket sleeve and a cam sleeve. As a result, rattling noise due to backlash of the splines is suppressed even when torque change is transmitted to the sprocket sleeve.

Abstract: A valve timing adjusting mechanism for an internal combustion engine includes an internal gear mounted on either one of a crankshaft or a cam shaft of the engine for rotation therewith, an external gear assembled in surrounding relationship with the internal gear, the external gear being driving connected to the other one of the crankshaft and camshaft for rotation therewith, and an intermediate gear set disposed in an annular space between the internal and external gears to be moved by fluid under pressure applied thereto in an axial direction for effecting relative rotation of the internal and external gears.

Abstract: A valve timing control device includes an input member to which a driving force is applied thereto, an output member having on its axis a cam for opening and closing a valve, a transmission member for transmitting torque between the output member and the input member and for changing the rotational position of the output member in relation to the input member in accordance with the position thereof, a slit member provided with a helical slit and secured to the input member and a passive member provided with a helical spline superposed with the helical slit of the slit member and secured to the output member. A base portion which is allowed to engage the helical slit of the slit member and a toothed portion which is allowed to engage with the helical spline of the passive member are formed in the transmission member so that the slit member is connected to the passive member via the slit member.

Abstract: The electrohydraulic adjusting device for actuating a device for adjusting at least one camshaft of an internal combustion engine relative to its crankshaft has two differential pistons each of which serves to adjust a camshaft (intake camshaft or exhaust camshaft). Each of the two differential pistons have a small effective piston surface which is acted upon with pressure by a pump. An independent pressure control valve is associated with each of the pressure chambers on a larger effective piston surface, via which valve, the pressure in this pressure chamber can be controlled independently of the other differential piston.

Abstract: A centrifugally actuated control is disclosed for shifting the camshaft of an internal combustion engine between an advanced and retarded condition relative to the ring sprocket and timing chain which are driven by the crankshaft of the internal combustion engine. The control device advantageously causes the shifting from an advanced condition to a retarded condition at a predetermined engine speed or RPM and causes the conditions of engine operation to improve for higher engine speed operation as well as maintains low engine speed operation at high efficiency levels. As the engine is slowed, the device restores the camshaft to its advanced condition for more efficient operation at the lower engine speed. The breakover point or engine speed at which the transition between advanced and retarded positioning occurs may be determined by the strength of the springs contained within the control assembly together with the mass of the centrifugally actuated arms contained therein.

Abstract: A camshaft has a front part forming a journal part for a wheel of a timing pulley (a drive member). A stub shaft (a driven member) is secured to the front of the camshaft and disposed within a cylindrical body of the timing pulley. An annular slide is disposed and coacts with the cylindrical body and the stub shaft for phasing action. The magnitude of axial movement of the slide determines the magnitude of relative rotation between the timing pulley and stub shaft. Fixedly attached to a timing pulley cover is a body formed with a cylindrical bore receiving a piston and a valve bore receiving a spool of a valve for regulating supply of fluid to and discharge thereof from a pressure chamber defined by the piston in the cylindrical bore. A motor is fixedly attached to the timing pulley cover is coupled with a worm of a worm gearing including a worm gear. A motion connection between the piston and the slide is established by a piston rod, a push rod, a cross bar and a slide spring biasing the slide.

Abstract: A variable cam phaser has drive and driven members connected by helical splines of an annular phase control piston and a lash control piston, axial motion of which varies the angular phase relation between the drive and driven members. A single wave spring received in a groove in one of the pistons biases them apart to take up lash in the splines. A return spring biases the phase control piston to an initial phase setting. Pre-timing of the members is provided for by a driven (or drive) member comprising two components, a hub flange that supports the other member and a splined hub carried by and initially rotatable on a tubular protrusion of the hub flange. After assembly of the phasing mechanism, the hub is rotated on the hub flange to pre-time the initial phasing of the members. An end of the tubular protrusion is then deformed into a flange engaging an annular shoulder on the hub to lock the hub and hub flange members together and maintain the pre-timing.

Abstract: A device is proposed which enables a cam controlling an internal combustion engine valve to be moved relative to its driving shaft. A drive member is rotatable with a driving shaft, and a cam for co-axial rotation relative to the driving shaft. An intermediate member is mounted in a support for rotation so as to rotate eccentrically with respect to an axis of the driving shaft. The support is held for movement within a plane perpendicular to the shaft axis. A control rod is drivingly associated with the support and driven by an actuator.

Abstract: A control system for a four-cycle internal combustion engine controls a cam drive mechanism for an intake valve such that a cam of the cam drive mechanism maintains a valve open duration of the intake valve at a short valve open duration in response to a shift from engine operation at low speed with low load to engine operation at low speed with high load, and the cam increases the valve open duration of the intake valve in response to a shift from engine operation at low speed with low load to engine operation at low speed with middle load that is higher than the low load but lower than the high load.

Abstract: A camshaft phase controller for an internal combustion engine controls separate intake and exhaust camshafts driven by the engine's crankshaft such that the angular phases of the camshafts may be varied by different amounts from a predetermined phase relationship with the crankshaft.

Abstract: A variable valve timing system includes helical splines to effect a relative rotation between an input member and an output member. The output member drives an intake and an exhaust valve against the urging force of a valve spring. The valve spring gives an undesired torque to the output member. The helical splines have backlash and the undesired torque causes a hitting noise. Therefore, a guide depression filled with viscous fluid is formed in front of the input member and a projection located and moved in the depression is formed in front of the output member. The depression and the projection with the viscous fluid form a damper to absorb the undesired torque.

Abstract: A hydraulic system with a hydraulic pump driven directly by an internal-combustion engine reduces the dimension, weight and number of component parts used in the state of the art systems while optimizing energy exploitation. A plurality of elements, one of which is a cam shaft adjusting device, are supplied with hydraulic pressure fluid by one and the same pump. A series of simplified hydraulic connections enables equivalent devices to be driven simultaneously by one or more pump circuits.

Abstract: A variable valve timing gear is suitable for internal-combustion engines of a piston construction which comprise intake and exhaust valves for the charge cycle control. The intake and exhaust valves are actuated by a camshaft which has intake and exhaust cams for this purpose. For influencing the valve overlap of the intake and exhaust valves, the intake and exhaust valves are constructed so that they can be rotated with respect to one another, for which a control arrangement is provided. This control arrangement is provided with a control element which is axially movably arranged in a bore of the camshaft and rotates the intake cams with respect to the exhaust cams via drivers constructed as pins and control guides.

Abstract: A variable lift height valve driving device which drives a valve of an internal combustion engine, varying the lift height of the valve. An inner shaft is disposed in a hollow cam shaft to be capable of reciprocating along the axis. A primary cam which has a primary cam surface is fitted around the hollow cam shaft at a specified position, and a secondary cam which has a secondary cam surface is fitted to the primary cam. With movement of the inner shaft, the secondary cam moves such that the secondary cam surface is set in a position to be on a level with the primary cam surface or in a position to protrude outward from the primary cam surface.

Abstract: A camshaft arrangement includes a cam mounted for angular motion on a camshaft with the angular motion being limited by cooperating stops in the camshaft and in a neck portion of the cam defining an interchamber filled with damping fluid. Damping fluid is supplied to the interchamber by a passage in a camshaft bearing sleeve which is in communication with a longitudinal passage in the camshaft through a valve designed to prevent the longitudinal passage from draining.

Abstract: In a valve timing control device, when a camshaft is retained relative to a timing pulley, a hydraulic piston is applied with a force which moves it in a direction toward an advancing-side hydraulic chamber (i.e., in the direction to vary a valve timing to a delaying side) owing to reaction of the driving torque of the camshaft. This force causes fluid to leak out of the advancing-side hydraulic chamber, and the hydraulic piston is liable to move toward this hydraulic chamber. However, fluid of an amount corresponding to an amount of this leakage is supplied to the advancing-side hydraulic chamber by way of a control valve. Also, discharge of fluid from a delaying-side hydraulic chamber via the control valve is stopped. Thus, the movement of the hydraulic piston toward the advancing-side hydraulic chamber when the hydraulic piston is retained at a desired position is prevented. Therefore, the hydraulic piston can be stably retained at the desired position, and a desired valve timing can be maintained.

Abstract: A device for angular adjustment between at least two shafts, a crankshaft and a cam shaft, in driving relationship in an internal combustion engine, comprising an adjusting element arranged in a region of a cylinder head and connected to the camshaft while being arranged in an axial direction thereof, the adjusting element comprising a piston which is displaceable between two substantially circular ring-shaped pressure chambers which are connected to a source of pressure medium, characterized in that a separate oil distributing element (16) is rigidly integrated in a cap (27) of the adjusting element (3) arranged at a front end of the camshaft (5) and said oil distributing element (16) comprises ducts (6,7) for pressure medium supply oriented towards the piston (14) which comprises two piston areas of identical dimensions.

Abstract: The device for the relative rotation of the shaft of an internal combustion engine with respect to the drive wheel, which is rotatably arranged on the shaft, has a hydrostatic pump whose housing is torsionally securely connected to the camshaft. Within the drive wheel and the pump, there is an electromagnetically actuable control valve which controls the pressure medium connections between the pumps and the setting device (rotary piston control), i.e. it subject the pressure spaces to pressure or relieves them, so that the camshaft is correspondingly rotated relative to the drive wheel. The electromagnet of the control valve is actuated by means of a control unit influenced by sensors. The pressure medium supply to the setting device takes place via a hole in the camshaft. A very compact adjusting device for the camshaft is achieved in this way.

Abstract: A variable cam phaser (VCP) is disclosed in various modifications. The VCP includes a piston responsive to pressure in a fluid chamber having an inlet orifice and a plurality of outlets including a first outlet and a plurality of second outlets. A valve slide is movable to cover said second outlets one after another to pressurize the fluid chamber to displace the piston against a return spring. Outer and inner splined slides are drivingly mated with an internal helical spline of a cylindrical body secured to a sprocket and an external helical spline of a stub shaft secured to a camshaft. The splined slides are disposed between the piston and the return spring. Thus, movement of the piston and splined slides assembly in response to pressurization or depressurization of the fluid chamber advances or retards the valve timing or phase angle of the camshaft relative to the sprocket.

Abstract: A camshaft assembly for variably actuating poppet valves of an internal combustion engine in relation to angular velocity. Pairs of cam lobes are separated by centripetal acceleration thereby varying dwell to optimize fuel economy, power output and emissions over a wide range of operating speeds.

Abstract: A non-backlash toothed wheel mechanism comprises, an internal gear, and an external gear mating with the internal gear wherein at least one of the internal gear and the external gear has a circumferentially arranged gear teeth array and at least two gear parts each of which has gear teeth forming a part of the circumferentially arranged gear teeth array, a positional relation between the gear parts is changeable, and the mechanism further comprises elastic means for urging one of the two gear parts relatively to another one of the two gear parts to change the positional relation between the gear parts so that each of the gear parts mates with another one of the internal gear and the external gear to reduce a backlash between the one of the internal gear and the external gear and the another one thereof.

Abstract: A driving connection between a hollow camshaft (1) and its driving shaft (5) located within it, the axes (3, 8) of these two members being parallel but laterally displaceable to vary the characteristics of rotation of the camshaft in response to constant-speed rotation of the driving shaft. The camshaft supports a slideway (11) in which moves a slider (12) which makes a rotary joint with the end of an arm (15) carried by the driving shaft. The geometry of the arm is such that the center of rotation (18) of the rotary joint lies within the outline of the periphery of the driving shaft (5) when viewed along its axis (8), thus promoting radial compactness. The essential component of the arm may be an item (15) of crescent-shaped cross-section, the concave surface (19) of the crescent registering with the surface of the driving shaft.

Abstract: An apparatus and method effects the cyclical actuation of an actuation member. The apparatus can be driven by a crankshaft and has at least one dual-acting phasing apparatus with at least three rotatable mounted internally splined members and at least a first rotatably mounted, externally splined, flexible member having a portion thereof rotatably disposed within each of at least two of the internally splined members. One inner splined member can be connected nonrotatably to a first rotatable member such as an inner shaft, which is rotatably disposed within an outer shaft of a concentric camshaft. Another internally splined member can be nonrotatably connected to the outer shaft. Yet another internally splined member can be nonrotatably connected to a pulley wheel driven by the crankshaft. A fourth internally splined member can be connected to one of the other three internally splined members.

Abstract: A variable cam arrangement for a lift valve includes a cam having a rigid part which is movable on a camshaft in a radial direction between a retracted and an extended position, the movable part being guided on the camshaft, and stops on the camshaft and the movable part to limit the motion of the part.

Abstract: A cam shaft assembly comprising an elongated shaft including an axis, an end, and an axial bore extending from the end of the shaft and having an end portion adjacent the end of the shaft, a cam located on the shaft and including a cam surface having an eccentric lobe surface and a partially cylindrical surface extending at a uniform radius from the axis, a slot extending axially in the shaft and radially between the axial bore and the cylindrical surface and including a first part in the cam and a second part spaced axially from the first part, an actuating shaft extending in the axial bore, a pin extending radially from the actuating shaft and into the slot for a radial distance greater than the radius of the cylindrical surface, a spring biasing the pin toward the first part of the slot, and a piston subject to fluid pressure, located in the end portion of the axial bore, and engagable with the actuating shaft to axially displace the actuating shaft against the action of the spring so as to locate the pin

Abstract: An internal combustion engine is equipped with a valve timing controller capable of minimizing the electric power consumption and frictional wear of elements. The valve timing controller can vary the valve timing of valves. A camshaft is moved axially forwardly or rearwardly by electrically energizing an outer solenoid clutch or a brake releasing solenoid, respectively. An axial movement of the camshaft results in a change in valve timing. With the exception of a transient period during which the valve timing is being varied, both the brake releasing solenoid and the outer clutch are electrically deenergized to thereby reduce the electric power consumption, and both of them are maintained out of contact with a displaceable disc 13 to thereby reduce frictional wear thereof.

Abstract: An adjustable rotor and/or a radial piston machine which may utilize an adjustable rotor. The rotor has a primary eccentric rotatable with a shaft and a secondary eccentric adjustable in position relative to the primary eccentric. The radial piston machine includes a plurality of piston cartridges arranged radially around the shaft and both high pressure and low pressure fluid distribution systems. Multiple units may be axially coupled: A single unit may handle a variety of fluids in various combinations.

Abstract: A device for changing the rotational position of a rotating, driven control shaft that controls the opening and closing of gas exchange valves of an internal combustion engine and is displaced via an electric motor and an interposed toggle lever arrangement having a downstream diagonal toothing arrangement for simplified displacement with minimal force and energy expenditures. The result is a simple, accessible, easy to maintain economical displacement drive for changing the rotational position of the control shaft in order to change the control times of gas-exchange valves in an internal combustion engine.

Abstract: A means of varying both the opening and closing angle of internal combustion engine valves by means of a mechanism which varies the instantaneous phase of the camshaft with respect to the phase of the crankshaft so causing the cam to spend a longer or shorter time than nominal in contact with the valve tappet in response to a chosen control programme.

Abstract: The valve drive of an internal combustion engine has sliding cams which are pretensioned and displaceable axially on a camshaft. The sliding cams are displaceable from a first position in which they act by a first elevation curve on intake valves into a second position in which they act by a second elevation curve on the intake valves. The sliding cams in the first position positively abut a stop of a transfer element connected between the intake valves and the sliding cams, so long as they travel with a segment in the vicinity of the stop. When the base circle of the sliding cams is reached, the sliding cams are displaced into the second position.

Abstract: A rotary position indicator for use with devices such as valves, electrical switches, and non-contact reed and proximity switches, which rotary position indicator includes a shaft rotatable about its longitudinal axis and includes a single plane adjustable cam bearing an external profile at its margin that is shaped to provide a camming portion for predetermined dwell and a camming portion for actuator of the device controlled thereby, which provides the option of adjusting the position of the cam relative to the shaft by the user manually shifting the cam in its plane to effect release of the cam relative to the shaft for rotation relative to the shaft to its new working position, with automatic releasable locking of said cam in its new working position then being effected.

Abstract: The invention relates to an adjustable force transmission arrangement in a big diesel engine for accomplishing force transmission from a crankshaft (9) of the engine by means of gear wheels to at least one camshaft (11). The arrangement includes a first gear wheel (1), which is in connection with the force transmission of the crankshaft (9), and a second gear wheel (2), which is in connection with the force transmission of the camshaft (11), said gear wheels (1,2) being arranged adjacent to each other and arranged in force transmitting connection with each other through a friction surface (5). In accordance with the invention the arrangement comprises a guiding element (3), which is supported by means of a separate slide bearing element (7) to the engine block (6) so that it is guided both in the radial and in the axial direction.

Abstract: A crankshaft mechanism for use with a press having a slide member, which includes an eccentric crankshaft. In one form of the mechanism, the crankshaft has a cylindrical eccentric portion. An eccentric sheave is rotatably mounted on the circumference of the eccentric portion so that its center is displaced radially from the center of the eccentric portion. A connecting member is rotatably mounted on the circumference of the sheave. The eccentric portion, sheave, and connecting member have pin-receiving bores whose axes intersect the crankshaft axis. The bores in the crankshaft and connecting rod are both aligned with the sheave bores when the crankshaft and the sheave are in predetermined angular positions. Lock pins in the eccentric portion bore are selectively engageable with the sheave bores to fix the sheave to the eccentric portion. Lock pins in the connecting rod bore are selectively engageable with the sheave bores to fix the sheave to the connecting member.

Abstract: A valve operating mechanism for an internal combustion engine is disclosed which includes a camshaft arranged in the cylinder head of an internal-combustion engine. A center shift cam is provided which can be selectively connected in a form-locking manner to be rotated on the camshaft or to be rotatable with respect to the cam shaft. On each side of the shift cam, one fixed cam is provided each of which is non-rotatably connected with the camshaft. In the full-load operation of the internal-combustion engine, an electronic control guides by way of a lock valve pressure oil into a hydraulic chamber of the fixed cam and in this case displaces pistons as well as a hollow piston to thereby connect the shift cam with one of the fixed cams. The form-lockingly coupled shift cam actuates intake valves by a relatively large lift by way of a tappet. In the partial-load operation, while the oil pressure is disconnected, the fixed cams actuate the tappet by a smaller lift.

Abstract: A device for adjusting a rotational angle relationship between a camshaft and its drive element, comprising two circular segment shells provided on the drive element together with an interposed part forming two working spaces therebetween. The both shells are connected to one of the camshaft and the drive element, and the interposed part being connected to the other of the cam shaft and the drive element while the circular segment shells being movable relative to the interposed part in a setting action such that during adjustment in the setting direction the circular segment shells are adjusted so that the volume enclosed in a first one of the working spaces increases while the volume enclosed in a second one of the working spaces decreases. Each of said working spaces are connected to a first setting pressure medium source separately via a non-return valve which opens toward a respective one of the working spaces, and the working spaces can be directly connected to one another by means of a control valve.

Abstract: A control device controls intake and exhaust valves of an internal combustion engine. The device comprises a first flange provided by a cam shaft of the engine, which flange has a first radially extending elongate slit. A second flange faces the first flange with a certain clearance therebetween and is secured to a drive shaft to rotate therewith. The second flange has a second radially extending elongate slit. An annular member is disposed within the clearance and rotatable about an axis of the drive shaft. First and second pins are rotatably held by opposed sides of the annular member respectively. These pins are positioned at diametrically opposed positions with respect to a center of the annular member and slidably engaged with the first and second elongate slits respectively. A drive mechanism is employed for pivoting the annular member about a pivot axis eccentric to the axis of the drive shaft in accordance with an operating condition of the engine.

Abstract: A hydraulic control device for the rotation of the camshaft of an internal combustion engine has a sprocket wheel which is driven by the internal combustion engine and connected with the camshaft via a couple member, a spiral toothing and a straight toothing, so that a relative rotation of the drive wheel and camshaft is effected by displacement of the couple member. The couple member is displaced via a hydraulic piston which is acted upon by a radial piston pump arranged in the control device, sucking pressure medium out of a pressure medium reservoir arranged in the engine, and feeding it to the pressure spaces at the piston via outlet valves. A pressure control valve which can be acted upon electromagnetically is connected to one of the pressure spaces and can be opened by corresponding actuation of the electromagnet so that the pressure space at the piston is relieved.

Abstract: A hydraulic control device for rotating a cam shaft of an internal combustion engine has a sprocket wheel driven by an internal combustion engine, a couple member engageable with a cam shaft and supported by one end of the sprocket wheel and engaging in a central bore hole of the sprocket wheel, a magnet valve arranged so that the couple member is axially displaceable by a liquid pressure controlled by the magnet valve to bring about a relative rotation of the cam shaft relative to the sprocket wheel, and a main piston acting on the couple member and arranged so that the liquid pressure acts on the main piston. A hydraulic body is mounted on the drive wheel, and an axial piston pump is arranged in the hydraulic body and has axial bore holes and a plurality of additional pistons which slide in the bore holes and having outer rounded portions which contact a wobble plate. Outlet valves are arranged at an outlet side of the bore holes and connected to a pressure space defined by the main piston.

Abstract: A tilt couple device having a pair of mounting members with each member having a wedge-shape cam. At least one of the cams has teeth on it that engages a pinion on an operating shaft. Rotation of the operating shaft causes the pinion to rotate one cam member relative to the other in order to change the inclination of one mounting surface relative to the other.