Internal combustion engine valve actuation and adjustable lift and timing

A cam can rotate on a camshaft of an internal combustion engine. A rocker arm that actuates a valve of the internal combustion engine can include a rocker pivot connection point located on a distal side of a valve component from a proximate end of the rocker arm that is deflected by action of the cam. The rocker arm can include a contact point located between the rocker pivot point and the proximate end. The contact point can act on the valve component to actuate the valve. The rocker pivot connection point can be translated such that it is closer to or further from the cam. This translation can be used to vary valve lift and/or valve timing. The cam can have a three-dimensional profile to provide different actuation distance of the rocker arm. Systems, methods, and articles of manufacture consistent with one or more of these features are described.

Engine assembly including camshaft actuator

An engine assembly may include an engine structure, a camshaft supported for rotation on the engine structure, a drive member and a camshaft actuation assembly. The camshaft may include a first shaft, a second shaft located within the first shaft and rotatable relative to the first shaft, a first cam lobe located on the first shaft and fixed for rotation with the first shaft and a second cam lobe supported for rotation on the first shaft and fixed for rotation with the second shaft. The drive member may be fixed to a first axial end of the camshaft and rotationally driven to drive rotation of the camshaft. The camshaft actuation assembly may include an actuator coupled to a second axial end of the camshaft and rotationally fixed to the engine structure and relative to the camshaft.

ADJUSTABLE CAMSHAFT

An adjustable camshaft may include an inner shaft and an outer shaft coaxially surrounding the inner shaft. A cam may have a cam body and a ring collar axially projecting from the cam body. The ring collar may be slidingly arranged with a radial gap on the outer shaft and have a receptacle for pinning together the cam and the inner shaft with a pin. A seal may be arranged in a region of the ring collar for sealing the gap. 1. An adjustable camshaft , comprising: an inner shaft and an outer shaft coaxially surrounding the inner shaft , and at least one cam having a cam body and a ring collar axially projecting from the cam body , wherein the ring collar is slidingly arranged with a radial gap on the outer shaft and has a receptacle for pinning together the cam with the inner shaft by a pin , a seal arranged in a region of the ring collar for sealing the gap.2. The camshaft according to claim 1 , wherein an axial sealing length of the ring collar and a radial height of the gap have a ratio of at least 50:1.3. The camshaft according to claim 1 , wherein an axial sealing length of the ring collar and a radial height of the gap have a ratio of at least 250:1.4. The camshaft according to claim 2 , wherein the axial sealing length of the ring collar extends substantially between the receptacle and an axial side face of the ring collar claim 2 , and wherein the axial side face faces away from the cam body.5. The camshaft according to claim 2 , wherein an inwardly open ring groove is arranged on an inner side of the ring collar claim 2 , and wherein the axial sealing length extends between a lateral edge of the ring groove claim 2 , and wherein the lateral edge faces toward an axial side face of the ring collar.6. The camshaft according to claim 5 , wherein the seal has a sealing element arranged radially between the ring collar and the outer shaft.7. The camshaft according to claim 6 , wherein the sealing element is at least one of an O-ring claim 6 , an X-ring and a piston ...

Method for producing a cam profile of a cam pack of a camshaft, and camshaft

A method concerns producing a cam profile of a cam pack with at least two cam elements that can be adjusted relative to each other. The camshaft may comprise an outer shaft, a rotatable inner shaft, a fixed cam element connected to the outer shaft, and an adjustment cam element connected to the inner shaft. The method may comprise processing an adjustment cam contour by a continuous diameter reduction of a segment of the adjustment cam base circle, wherein the adjustment cam base circle is reduced to a diameter that is smaller than a fixed cam nominal circle diameter minus a doubled adjustment cam base circle tolerance. The method may comprise processing a fixed cam contour by reducing a fixed cam contour protrusion in a region between a transition point and a processing point. Upon reaching the transition point a tapping element for converting a revolving motion of the cam elements into a linear motion of the valves is transferred from the fixed cam element to the adjustment cam element.

Engine variable camshaft timing phaser with planetary gear assembly

An engine variable camshaft timing phaser (10) includes a sprocket (12) and a planetary gear assembly (14). The sprocket (12) receives rotational drive input from an engine crankshaft. The planetary gear assembly (14) includes two or more ring gears (26, 28), multiple planet gears (24), a sun gear (22), and a wrap spring (76). One of the ring gears (26, 28) receives rotational drive input from the sprocket (12) and one of the ring gears (26, 28) transmits rotational drive output to an engine camshaft. The sun gear (22) engages with the planet gears (24). The wrap spring (76) experiences expansion and contraction exertions to permit advancing and retarding engine valve opening and closing, and to prevent advancing and retarding engine valve opening and closing.

SLIDING CAM ARRANGEMENT FOR VARIABLE ACTUATING GAS EXCHANGE VALVES OF AN INTERNAL COMBUSTION ENGINE

A sliding cam arrangement for the variable actuation of gas exchange valves of an internal combustion engine, having a camshaft which has toothing regions with an external toothing, wherein the toothing regions mesh in each case with an internal toothing of a cam carrier, wherein the ratio of base circle radius R of the cam carrier to tip circle radius R of the toothing of the camshaft satisfies the following criteria: RR<1.55. 121. A sliding cam arrangement for variable actuation of gas exchange valves of an internal combustion engine , comprising a camshaft having toothing regions with an external toothing , wherein the toothing regions mesh with an internal toothing of a cam carrier , wherein a ratio of a base circle radius R of the cam carrier to a tip circle radius R of the toothing of the camshaft is less than 1.55.2. The sliding cam arrangement as claimed in claim 1 , wherein the ratio is between 1.2 and 1.55. This application claims priority to German Patent Application No. 10 2012 109 690.2, filed Oct. 11, 2012, which is incorporated by reference herein in its entirety.The invention relates to a sliding cam arrangement for the variable actuation of gas exchange valves of an internal combustion engine, having a camshaft which has toothing regions with an external toothing, wherein the toothing regions mesh in each case with an internal toothing of a cam carrier.Sliding cam arrangements of said type are well known from the prior art. For example, DE 10 2008 035 935 A1, which is incorporated by reference herein, discloses a sliding cam arrangement which has a camshaft with toothing regions, on which camshaft there are provided in each case cam carriers with two cams which engage with a respective gas exchange valve. To effect a displacement of the respective cam carrier, actuators are provided which, by means of drivers and grooves provided on the cam carriers, permit a displacement of the cam carriers in an axial direction. In the automotive field, the ...

CAMSHAFT ASSEMBLY

A camshaft assembly for a vehicle engine includes a camshaft member, a cam phaser and a cam nose. The camshaft member includes a front end and a rear end. The camshaft member may be configured to actuate at least one intake valve of a combustion chamber. The cam phaser affixed to the front end of the camshaft member while the cam nose may be disposed at the front end of the camshaft. The cam nose further includes a cam nose face with a curvilinear groove surrounding a central axis region of the cam nose. The curvilinear groove may be configured to engage with the cam phaser to prevent oil leakage out from the central axis region and/or to rotationally lock the cam phaser to the camshaft member. 1. A camshaft assembly for a vehicle engine , the camshaft assembly comprising:a camshaft member having a front end and a rear end, the camshaft member configured to actuate at least one intake valve of a combustion chamber;a cam phaser affixed to the front end of the camshaft member; anda cam nose disposed at the front end of the camshaft member, the cam nose having a cam nose face with an curvilinear groove surrounding a central axis region of the cam nose and configured to engage with the cam phaser and prevent oil leakage out from the central axis region.2. The camshaft assembly as defined in wherein the cam phaser further comprises an input gear and an output gear wherein the output gear is configured to drive the rotation of the camshaft member via at least an engagement between the cam phaser and the curvilinear groove.3. The camshaft assembly as defined in wherein the output gear is rotatably supported by the input gear.4. The camshaft assembly as defined in wherein the output gear face deforms upon engagement with the curvilinear groove.5. The camshaft assembly as defined in wherein the curvilinear groove further includes a curvilinear valley and a curvilinear protrusion formed on each side of the curvilinear valley.6. The camshaft assembly as defined in wherein the ...

Internal Combustion Engine Valve Train Adjustment Device

A device for adjusting a motor vehicle valve train includes at least one camshaft with at least four cam elements arranged in an axially displaceable manner. In each case two of the cam elements that are adjacently situated are formed as a cam element group to be switched together.

Camshaft adjuster

A camshaft adjuster having a first component, a second component rotatable relative to the first component within an angular range, and a locking device for locking the first component relative to the second component. The locking device includes a first locking bolt and a second locking bolt on the first component and a central slotted guide on the second component, and wherein the two locking bolts are movably guided between a locking position and an unlocking position and engage in the central slotted guide in a central angular position relative to one another in their locking position. At least one terminal slotted guide, in which the first locking bolt or the second locking bolt engages in its locking position in a terminal angular position differing from the central angular position of the components, is arranged on the second component.

MULTIPLE VARIABLE VALVE LIFT APPARATUS

A multiple variable valve lift apparatus disposed at an intake part and an exhaust part of an engine includes: a moving cam rotating together with a camshaft, being movably disposed in an axial direction of the camshaft, and forming a plurality of cams for realizing valve lift to be different from each other and a cam guide protrusion; an operating unit selectively guiding the cam guide protrusion so as to move the moving cam in an axial direction of the camshaft; a controller controlling an operation of the operating unit; and a valve opening/closing unit opened/closed by contacting any one among the plurality of cams. 1. A multiple variable valve lift apparatus , which is provided at an intake part and an exhaust part of an engine , comprising:a moving cam rotating together with a camshaft, being movably disposed in an axial direction of the camshaft, and forming a plurality of cams for realizing valve lift to be different from each other and a cam guide protrusion;an operating unit selectively guiding the cam guide protrusion so as to move the moving cam in an axial direction of the camshaft;a controller controlling an operation of the operating unit; anda valve opening/closing unit opened/closed by contacting any one among the plurality of cams,wherein a plurality of cams of the intake part comprises:an intake part first cam disposed so as to have a phase for retarding open timing of an intake valve from a timing of completing exhaust;an intake part second cam disposed so as to have a phase for opening the intake valve after the timing of completing exhaust; andan intake part third cam disposed so as to have a phase for advancing open timing of the intake valve from the timing of completing exhaust.2. The multiple variable valve lift apparatus of claim 1 , wherein the operating unit comprises a solenoid operated by the controller and a guide part claim 1 , in which the cam guide protrusion is inserted claim 1 , selectively protruded depending on an operation of ...

CONTINUOUS VARIABLE VALVE DURATION APPARATUS AND ENGINE PROVIDED WITH THE SAME

A continuous variable valve duration apparatus includes a camshaft. A slider, which is mounted to the camshaft, has a camshaft sliding key and a cam portion of which a cam and a cam sliding key are formed thereto. The camshaft is inserted into the cam portion, and a relative phase between the cam and the camshaft is variable. A roller ring is connected with the camshaft sliding key and the cam sliding key. The roller ring is rotatably inserted into a roller ring guider, and the roller ring guider slidably inserted into a cylinder head. A control portion selectively changes a position of the roller ring guider to control a rotation center position of the roller ring. 1. A continuous variable valve duration apparatus comprising:a camshaft;a slider mounted to the camshaft and having a camshaft sliding key;a cam portion having a cam and a cam sliding key, into which the camshaft is inserted, and having a variable relative phase between the cam and the camshaft;a roller ring connected with the camshaft sliding key and the cam sliding key;a roller ring guider into which the roller ring is rotatably inserted, the roller ring guider being slidably inserted into a cylinder head; anda control portion selectively changing a position of the roller ring guider to control a rotation center position of the roller ring.2. The apparatus of claim 1 , further comprising:a first pin having a sliding key slot for the camshaft sliding key to be slidably inserted thereto; anda second pin having a sliding key slot for the cam sliding key to be slidably inserted thereto,wherein the roller ring includes a first sliding pin hole and a second sliding pin hole for the first pin and the second pin to be inserted thereto, respectively.3. The apparatus of claim 2 , wherein:the first and the second pins have a cylinder shape; andthe first and second pins rotate in the first and second sliding pin holes.4. The apparatus of claim 3 , wherein the sliding key slots of the first and second pins are ...

ENGINE FOR PERFORMING CDA

An engine that can implement cylinder deactivation (CDA) includes: a plurality of cylinders; a variable valve duration apparatus that is mounted in at least one of the plurality of cylinders and that performs a long duration mode and a short duration mode of an intake valve of a corresponding cylinder; a CDA apparatus that is mounted in at least another one of the plurality of cylinders and that performs a general operation mode and a CDA mode of an intake valve and an exhaust valve of a corresponding cylinder; and a controller that controls operation of the variable valve duration apparatus and the CDA apparatus according to an operation state of an engine, wherein the controller controls the variable valve duration apparatus to operate in a short duration mode, when the CDA apparatus operates in the CDA mode. 1. An engine for performing cylinder deactivation (CDA) , comprising:a plurality of cylinders;a variable valve duration apparatus that is mounted in at least one of the plurality of cylinders and that performs a long duration mode and a short duration mode of an intake valve of a first corresponding cylinder;a CDA apparatus that is mounted in at least another one of the plurality of cylinders and that performs a general operation mode and a CDA mode of an intake valve and an exhaust valve of a second corresponding cylinder; anda controller that controls operation of the variable valve duration apparatus and the CDA apparatus according to an operation state of an engine,wherein the controller controls the variable valve duration apparatus to operate in the short duration mode, when the CDA apparatus operates in the CDA mode.2. The engine of claim 1 , wherein the engine is an engine comprising first claim 1 , second claim 1 , third claim 1 , and fourth cylinders sequentially disposed claim 1 , the CDA apparatus is provided in the second and third cylinders or the first and fourth cylinders claim 1 , and the variable valve duration apparatus is provided in the ...

CAMSHAFT

An adjustable camshaft may include an inner shaft and an outer shaft arranged coaxially thereto. The camshaft may also include a camshaft adjuster having a stator connected to the outer shaft in a torque-proof manner, and a rotor connected to the inner shaft. The camshaft may further include an integral first connection contour provided at an end of the inner shaft, and an integral second connection contour complementary to the integral first connection contour and provided on the rotor. The connection contours may directly or indirectly enable an interlocking connection between the inner shaft and the rotor. 1. An adjustable camshaft comprising:an inner shaft and an outer shaft arranged coaxially thereto;a camshaft adjuster having a stator connected to the outer shaft in a torque-proof manner, and a rotor connected to the inner shaft; andan integral first connection contour provided at an end of the inner shaft, and an integral second connection contour complementary to the integral first connection contour and provided on the rotor, the connection contours directly or indirectly enabling an interlocking connection between the inner shaft and the rotor.2. The camshaft according to claim 1 , wherein the integral first connection contour is configured as a tongue claim 1 , and the integral second connection contour is configured as a groove configured in a complementary manner thereto claim 1 , so that the integral first connection contour and the integral second connection contour together form a single-acting Oldham coupling claim 1 , wherein the tongue and the groove are aligned parallel to a pin connecting a first cam with the inner shaft.3. The camshaft according to claim 1 , wherein at least one of the integral first connection contour and the integral second connection contour is configured so as to be dome-shaped.4. The camshaft according to claim 1 , further comprising a screw connecting the rotor with the inner shaft claim 1 , the screw having an oil ...

CAMSHAFT UNIT

Camshaft unit () having a first camshaft (), which is phase-adjustable with respect to a crankshaft, a second camshaft (), which is disposed concentric to the first camshaft () and is always in phase with the crankshaft, a camshaft adjuster () with which the first camshaft () is phase-adjustable with respect to the crankshaft, a connecting member (), which is displaceable in the axial direction of the camshafts () and has first toothed section () that meshes with counter-toothed section () on the first camshaft (), and an adjusting drive () by which a connecting member () can be displaced axially, wherein through an axial advance, a relative rotation of the first camshaft () with respect to the connecting member () takes place. 1. Camshaft A camshaft unit , comprising:a first camshaft that is phase-adjustable with respect to a crankshaft,a second camshaft that is arranged concentric to the first camshaft and is always in phase with respect to the crankshaft,a camshaft adjuster with which the first camshaft is phase-adjustable with respect to the crankshaft,a connecting element that shifts in an axial direction of the camshafts with a first toothed section, the first toothed section meshes with a first counter toothed section on the first camshaft, andan adjustment drive through which the connecting element is moved in the axial direction, wherein an axial advance produces a relative rotation of the first camshaft with respect to the connecting element.2. The camshaft unit according to claim 1 , wherein the camshaft adjuster has a ball screw-type drive with a spindle as the adjustment drive.3. The camshaft unit according to claim 2 , wherein the adjustment drive has a threaded nut mounted on the connecting element or formed in one piece with the connecting element.4. The camshaft unit according to wherein one of the camshafts is supported by ball bearings on the spindle.5. The camshaft unit according to claim 1 , wherein the camshafts are immovable in the axial ...

VARIABLE VALVE MECHANISM

In a variable valve mechanism, a guide groove includes guide portions provided on respective side surfaces of the guide groove in a width direction, the guide portions projecting so as to face each other; a cam unit is slid toward a first side by relatively moving a shift pin toward a second side with use of the guide portion on the first side, and the cam unit is slid toward the second side by relatively moving the shift pin toward the first side with use of the guide portion on the second side; the guide portion on the first side is provided in an immovable piece, and the guide portion on the second side is provided in a movable piece; the movable piece is displaceable between a first position and a second position: and a first urging member configured to urge the movable piece toward the first position is provided. 1. A variable valve mechanism comprising:a cam unit having a cylindrical shape and including a plurality of cams, the cam unit being provided around a camshaft; anda shift pin, wherein:any one of the plurality of cams provided in the cam unit is selected by engaging the shift pin, from an outside, with a guide groove provided on an outer periphery of the cam unit so as to slide the cam unit in an axial direction of the camshaft along with rotation of the camshaft;the guide groove includes a pair of guide portions provided on respective side surfaces of the guide groove in a width direction of the guide groove, the pair of guide portions projecting so as to face each other;the guide groove is configured such that the cam unit is slid toward a first side by relatively moving the shift pin toward a second side opposite to the first side with use of the guide portion on the first side in the pair of guide portions, and the cam unit is slid toward the second side by relatively moving the shift pin toward the first side with use of the guide portion on the second side in the pair of guide portions;the cam unit includes an immovable piece provided so as not ...

CAMSHAFT FOR THE VALVE DRIVE OF AN INTERNAL COMBUSTION ENGINE WITH A VARIABLE VALVE OPENING DURATION

A camshaft for a valve drive of an internal combustion engine having a variable valve opening time may include an outer shaft and an inner shaft that extends through the outer shaft, with the inner shaft being held rotatably with respect to the outer shaft. The camshaft may further include a cam having a multiple-piece configuration, comprising a first part cam and a second part cam. Either the first part cam or the second part cam may be connected fixedly to the outer shaft so as to rotate with it, and the other part cam may be connected fixedly to the inner shaft so as to rotate with it. The camshaft may also include a bearing inner ring of a shaft bearing that is held on the outer shaft, with one of two second part cams comprising an axial attachment that forms at least one part of the bearing inner ring. 15.-. (canceled)6. A camshaft for a valve drive of an internal combustion engine having a variable valve opening time , the camshaft comprising:an outer shaft;an inner shaft that extends through the outer shaft, with the inner shaft being held rotatably with respect to the outer shaft;a cam having a multiple-piece configuration and comprising a first part cam and a second part cam, wherein either the first part cam or the second part cam is connected fixedly to the outer shaft so as to rotate with the outer shaft, wherein the part cam that is not connected fixedly to the outer shaft so as to rotate with the outer shaft is connected fixedly to the inner shaft so as to rotate with the inner shaft; anda bearing inner ring of a shaft bearing being held on the outer shaft, wherein the second part cam comprises an axial attachment that forms at least one part of the bearing inner ring.7. The camshaft of wherein the cam is a first cam claim 6 , the camshaft further comprising a second cam that is adjacent to the first cam and comprises a first part cam and a second part cam claim 6 , wherein the bearing inner ring has a multiple-piece configuration and a part of the ...

VARIABLE VALVE MECHANISM

A variable valve mechanism includes a cam shaft, a cam unit, a guide portion and a shift pin. The guide portion includes a guide plate provided on an outer periphery of a cam unit, a first stopper and a second stopper. The guide plate is pivotally supported at a first part such that a second part of the guide plate is inclined toward a first side or a second side. The first and second stoppers abut with the second part from the first side and the second side, respectively, so as to hold the second part at a first position and a second position, respectively. The first part includes two arms projecting toward the first side and the second side. The two arms are configured to swing the guide plate. 1. A variable valve mechanism comprising:a cam shaft;a cam unit having a cylindrical shape and provided around the cam shaft, the cam unit including a plurality of cams, the cam unit being configured to be slid in a cam axial direction along with a rotation of the cam shaft such that one of the plurality of cams is selected, the cam axial direction being an axial direction of the cam shaft;a guide portion provided on an outer periphery of the cam unit; anda shift pin configured to externally engage with the guide portion, whereinthe guide portion includes a guide plate, a first stopper and a second stopper,the guide plate is provided on the outer periphery of the cam unit such that the guide plate extends in a circumferential direction of the cam unit,the guide plate includes a first part on a base side of the guide plate, and a second part on a tip side of the guide plate, the second part extends from the first part in a rotation direction of the cam shaft,the guide plate is pivotally supported at the first part,the guide plate is configured to swing such that the second part is inclined to one of a first side and a second side in the cam axial direction,the first stopper is configured to abut with the second part from the first side such thatthe first stopper holds the ...

Method for operating a valve train of an internal combustion engine and corresponding valve train

A method and apparatus for operating a valve train of an internal combustion engine having a main camshaft for which at least one rotationally-fixed cam carrier is provided that can be shifted between two axial positions is disclosed. An actuator cooperates with at least one shift gate to axially shift the cam carrier into a target position. The actuator comprises a driver that is extended in the direction of at least one sliding slot of the shift gate to shift the cam carrier. The sliding slot has an ejection ramp in an ejection region that ejects the driver out of the sliding slot until the conclusion of the shift. A voltage induced in the actuator by the ejection is detected, the induced voltage is integrated across a rotational-angle range associated with the ejection region, and a confirmation signal is generated when the integrated voltage exceeds a threshold level.

Valve device for internal combustion engine

A first swing arm of each cylinder is swung by a fixed cam of an intake camshaft, so as to operate a first intake valve according to a profile thereof. A second swing arm is swung by a second cam and its swing range is changed by a variable mechanism. Hereby, a lift amount of a second intake valve changes continuously. The second cam is selected from a plurality of cams on a cam piece provided around the intake camshaft.

CONTINUOUS VARIABLE VALVE DURATION APPARATUS AND ENGINE PROVIDED WITH THE SAME

A continuous variable valve duration apparatus includes a camshaft, a plurality of wheels mounted to the camshaft, of which a wheel key is formed thereto respectively, a plurality of cam portions of which a cam and a cam key are formed thereto respectively, of which the camshaft is inserted thereto, of which relative phase angle with respect to the camshaft is variable, a plurality of inner brackets connected with the each wheel key and the each cam key, a slider housing of which the each inner bracket is rotatably inserted thereto, and rotatably configured around a hinge bracket connected to a cylinder head and a control portion selectively moving the slider housings to change relative position of a rotation center of the inner brackets. 1. A continuous variable valve duration apparatus comprising:a camshaft;a plurality of wheels mounted to the camshaft, of which a wheel key is formed thereto respectively;a plurality of cam portions of which a cam and a cam key are formed thereto respectively, of which the camshaft is inserted thereto, of which relative phase angle with respect to the camshaft is variable;a plurality of inner brackets connected with each wheel key and each cam key;a plurality of slider housings of which each inner bracket is rotatably inserted thereto, and rotatably configured around a hinge bracket connected to a cylinder head; anda control portion selectively moving the slider housings to change relative position of a rotation center of the inner brackets.2. The continuous variable valve duration apparatus of claim 1 , further comprising:first pins of which a wheel key slot, the each wheel key is slidably inserted thereto, is formed thereto respectively; andsecond pins of which a cam key slot, the each cam key is slidably inserted thereto, is formed thereto respectively, andwherein a first sliding pin hole and a second sliding pin hole, of which the first pins and the second pins are inserted thereto respectively, are formed to the inner bracket. ...

ADJUSTABLE CAMSHAFT

An adjustable camshaft may include an inner shaft and an outer shaft disposed coaxial therewith. A first cam may be connected non-rotatably to the inner shaft, and a second cam may be connected non-rotatably to the outer shaft. At least two bearing elements may be connected fixedly to the outer shaft. The first cam may be disposed between the at least two bearing elements. The at least two bearing elements may fix the first cam in an axial direction relative to the outer shaft, and the at least two bearing elements via the first cam may fix the inner shaft in the axial direction relative to the outer shaft. 1. An adjustable camshaft , comprising:an inner shaft and an outer shaft disposed coaxial therewith;a first cam connected non-rotatably to the inner shaft;a second cam connected non-rotatably to the outer shaft; andat least two bearing elements connected fixedly to the outer shaft, wherein the first cam is disposed between the at least two bearing elements, and wherein the at least two bearing elements fix the first cam in an axial direction relative to the outer shaft and the at least two bearing elements via the first cam fix the inner shaft in the axial direction relative to the outer shaft.2. The camshaft according to claim 1 , further comprising a phase adjuster claim 1 , wherein the first cam and the at least two bearing elements are disposed in a region of the phase adjuster.3. The camshaft according to claim 1 , further comprising another first cams and another second cam claim 1 , wherein only the first cam is fixed by the at least two bearing elements.4. The camshaft according to claim 1 , wherein at least one of the at least two bearing elements is defined by the second cam.5. The camshaft according to claim 1 , wherein at least one of the at least two bearing elements is structured as a bearing ring.6. The camshaft according to claim 1 , wherein at least one of the at least two bearing elements is fixed on the outer shaft by at least one of a thermal ...

ADJUSTABLE CAMSHAFT

An adjustable camshaft may include an inner shaft and an outer shaft arranged coaxially thereto, and a phase shifter having a stator and a rotor. The stator may be connected to the outer shaft in a rotationally fixed manner, and the rotor may be connected to the inner shaft in a rotationally fixed manner. On an outside of the outer shaft, a first connection contour may be provided. The first connection contour may interact with a second connection contour on the stator formed complementarily thereto in a form-fit manner and enabling at least a tolerance offset in an axial direction. 1. An adjustable camshaft comprising:an inner shaft and an outer shaft arranged coaxially thereto; anda phase shifter having a stator and a rotor, the stator being connected to the outer shaft in a rotationally fixed manner, and the rotor being connected to the inner shaft in a rotationally fixed manner;wherein on an outside of the outer shaft, a first connection contour is provided, the first connection contour interacting with a second connection contour on the stator formed complementarily thereto in a form-fit manner and enabling at least a tolerance offset in an axial direction.2. The camshaft according to claim 1 , wherein on an outside of the inner shaft claim 1 , a third connection contour is provided claim 1 , the third connection contour interacting with a fourth connection contour on the rotor formed complementarily thereto in a form-fit manner and enabling at least a tolerance offset in the axial direction.3. The camshaft according to claim claim 1 , wherein the rotor is screwed to the inner shaft.4. The camshaft according to claim 1 , wherein the first connection contour is formed integrally with the outer shaft.5. The camshaft according to claim 1 , wherein the first connection contour is arranged on a sleeve fastened on the outer shaft.6. The camshaft according to claim 2 , wherein at least one of:the first connection contour and the second connection contour are formed in ...

ADJUSTABLE CAMSHAFT

An adjustable camshaft may have an inner shaft and an outer shaft arranged coaxially thereto, the outer shaft having a recess, and the inner shaft having a recess open towards the outer shaft. The camshaft may also include a first cam connected to the inner shaft in a torque-proof manner, and a second cam connected to the outer shaft in a torque-proof manner. The camshaft may further include at least one axial bearing element fixed in the recess of the outer shaft and that engages in the recess of the inner shaft. 1. An adjustable camshaft comprising:an inner shaft and an outer shaft arranged coaxially thereto, the outer shaft having a recess, and the inner shaft having a recess open towards the outer shafta first cam connected to the inner shaft in a torque-proof manner;a second cam connected to the outer shaft in a torque-proof manner; andat least one axial bearing element fixed in the recess of the outer shaft and that engages in the recess of the inner shaft.2. The camshaft according to claim 1 , wherein the at least one axial bearing element is configured as an axial bearing pin and the recess of the outer shaft is configured as a through-opening in the outer shaft claim 1 , the axial bearing pin being inserted through the through-opening and engaging in the recess of the inner shaft.3. The camshaft according to claim 2 , wherein the at least one axial bearing element includes two axial bearing elements configured as axial bearing pins inserted through respective opposite through-openings in the outer shaft.4. The camshaft according to claim 1 , wherein the recess of the inner shaft extends at least partially around an outer circumference of the inner shaft.5. The camshaft according to claim 1 , wherein:the recess of the inner shaft is configured as an annular groove, and the outer shaft includes an additional annular groove open towards the recess of the inner shaft;the at least one axial bearing element is configured as a circlip, which in a mounted state ...

CAMSHAFT-IN-CAMSHAFT APPARATUS OF VARIABLE VALVE DURATION SYSTEM

A camshaft-in-camshaft apparatus may include a hollow outer shaft having at least one slot formed along a length direction of the hollow outer shaft, an inner shaft rotatably inserted inside the outer shaft and having at least one pin hole formed on the inner shaft, a position of each of the at least one pin hole corresponding to that of each of the at least one slot, one or more first cam lobes fixedly mounted on an exterior circumference of the outer shaft, one or more second cam lobes fixedly mounted on the inner shaft to be rotatable on the corresponding slot of the outer shaft, a cam phaser changing a phase angle between the outer shaft and the inner shaft by rotating any one of the outer shaft and the inner shaft, and at least one torsional spring mounted between any one of the one or more first cam lobes and any one of the one or more second cam lobes. 1. A camshaft-in-camshaft apparatus comprising:a hollow outer shaft having at least one slot formed along a length direction thereof;an inner shaft rotatably inserted inside the outer shaft and having at least one pin hole formed thereon, a position of each of the at least one pin hole corresponding to that of each of the at least one slot;one or more first cam lobes fixedly mounted on an exterior circumference of the outer shaft;one or more second cam lobes fixedly mounted on the inner shaft to be rotatable on the corresponding slot of the outer shaft;a cam phaser changing a phase angle between the outer shaft and the inner shaft by rotating any one of the outer shaft and the inner shaft; andat least one torsional spring mounted between any one of the one or more first cam lobes and any one of the one or more second cam lobes.2. The camshaft-in-camshaft apparatus of claim 1 ,wherein a first cam hole is formed at any one of the one or more first cam lobes and a second cam hole is formed at any one of the one or more second cam lobes, andwherein both ends of one or each of the at least one torsional spring ...

LOW FRICTION CAMSHAFT WITH ELECTRIC PHASER

An exemplary engine assembly includes a crankshaft, and a camshaft having cam lobes mounted thereon. The cam lobes are configured to provide lift to respective devices as a function of a rotation of the camshaft. The cam lobes are circumferentially offset from one another such that a timing of operation of the lift is different for each of the at least two cam lobes. The assembly includes at least one roller bearing coupled to the camshaft, and an electric cam phaser configured to alter the timing of the camshaft with respect to the crankshaft as a function of engine operation. 1. An engine assembly comprising:a crankshaft;a camshaft having at least two cam lobes mounted thereon, the at least two cam lobes configured to provide lift to respective devices as a function of a rotation of the camshaft, wherein the at least two cam lobes are circumferentially offset from one another such that a timing of operation of the lift is different for each of the at least two cam lobes;at least one roller bearing coupled to the camshaft; andan electric cam phaser configured to alter the timing of the camshaft with respect to the crankshaft as a function of engine operation.2. The engine assembly of claim 1 , wherein the at least one roller bearing is one of a conical roller bearing claim 1 , a ball bearing claim 1 , a needle bearing claim 1 , and a cylindrical bearing.3. The engine assembly of claim 1 , wherein at least one of the roller bearings coupled to the camshaft operates without a lubricating oil feed.4. The engine assembly of claim 3 , wherein all of the roller bearings coupled to the camshaft do not have a lubricating oil feed.5. The engine assembly of claim 1 , wherein:the camshaft is comprised of an inner shaft and an outer shaft that is outside the inner shaft;one of the at least two cam lobes is mounted to the inner shaft;another of the at least two cam lobes is mounted to the outer shaft; andthe electric cam phaser is a cam phaser assembly that provides dual ...

CONTINUOUS VARIABLE VALVE DURATION APPARATUS AND ENGINE PROVIDED WITH THE SAME

A continuous variable valve duration apparatus may include a camshaft, a cam device on which a cam is formed, of which the camshaft is inserted thereto and of which a relative phase angle with respect to the camshaft is variable, an internal bracket transmitting rotation of the camshaft to the cam device, a wheel housing in which the internal bracket is rotatably inserted and on which a guide groove parallel to the camshaft is formed, a control portion including a control shaft disposed parallel to the camshaft and inserted into the guide groove, and the control portion selectively rotating the control shaft for the relative position of the wheel housing with respect to the camshaft to be changed and a slider housing interposed between the control shaft and the guide groove. 1. A continuous variable valve duration apparatus comprising:a camshaft;a cam device on which a cam is formed, of which the camshaft is configured to be inserted thereto and of which a relative phase angle with respect to the camshaft is variable;an internal bracket transmitting a rotation of the camshaft to the cam device;a wheel housing in which the internal bracket is rotatably inserted and on which a guide groove parallel to the camshaft is formed;a control portion including a control shaft disposed parallel to the camshaft and inserted into the guide groove, and the control portion configured for selectively rotating the control shaft for a relative position of the wheel housing with respect to the camshaft to be changed; anda slider housing interposed between the control shaft and the guide groove.2. The continuous variable valve duration apparatus of claim 1 , whereina guide hole vertical to the camshaft is formed at the wheel housing, andwherein the continuous variable valve duration apparatus further includes a guide portion including a guide shaft inserted into the guide hole for guiding a movement of the wheel housing.3. The continuous variable valve duration apparatus of claim 2 , ...

HYDRAULIC PRESSURE CONTROL VALVE AND INTERNAL-COMBUSTION ENGINE VALVE TIMING CONTROL APPARATUS

Provided is a hydraulic pressure control valve capable of exhibiting a filter detent function without degrading the assemblability of filters to a valve body. 1. A hydraulic pressure control valve comprising:a valve body including a cylindrical peripheral wall, a plurality of opening portions formed in the peripheral wall at respective positions spaced from each other in an axial direction of the peripheral wall to allow hydraulic fluid to flow therethrough in a radial direction of the peripheral wall, annular grooves formed on an outer periphery of the peripheral wall at axially spaced positions at which the opening portions are formed, respectively, and a restraining portion provided in each of the annular grooves;a spool valve axially movably provided in the peripheral wall to open and close at least one of the opening portions according to moving position of the spool valve; andfilters wound around the peripheral wall to cover the opening portions, respectively, the filters each including a mesh portion for filtering the hydraulic fluid and a mask portion covering the restraining portion.2. The hydraulic pressure control valve of claim 1 , wherein when the axial direction of the peripheral wall is assumed to be a widthwise direction of the mask portion claim 1 , widthwise ends of the mask portion are open.3. The hydraulic pressure control valve of claim 2 , wherein the restraining portion is a projection projecting radially outward of the valve body;the mask portion being an outwardly projecting portion projecting radially outward of the valve body to cover the projection.4. The hydraulic pressure control valve of claim 3 , wherein the mesh portion is provided at each of two positions facing each other in a circumferential direction of the valve body across the mask portion.5. The hydraulic pressure control valve of claim 4 , wherein the projection is provided at a circumferential end edge of an associated one of the opening portions.6. The hydraulic pressure ...

VALVE CONTROL SYSTEM HAVING AN ADJUSTABLE CAMSHAFT

A valve control system may include an adjustable camshaft that includes an outer shaft and an inner shaft that extends through the outer shaft. The valve control system may further include a phase shifter that comprises a first control element and a second control element that can be rotated relative to the first control element. The outer shaft and the inner shaft may each be connected with a control element. The valve control system may also include a stop coupled with the outer shaft in a torque-proof manner, as well as a counter-stop coupled with the inner shaft in a torque-proof manner. A maximal angle of rotation of the inner shaft in the outer shaft may be determined by the stop bordering on the counter-stop.” 115.-. (canceled)16. A valve control system comprising:an adjustable camshaft including an outer shaft and an inner shaft that extends through the outer shaft;a phase shifter including a first control element and a second control element that is rotatable relative to the first control element, wherein the outer and inner shafts are each connected with one of the first or second control elements;a stop coupled with the outer shaft in a torque-proof manner; anda counter-stop coupled with the inner shaft in a torque-proof manner,wherein a maximal angle of rotation of the inner shaft in the outer shaft is determined by the stop bordering on the counter-stop.17. The valve control system of wherein the stop comprises a claw claim 16 , wherein the counter-stop comprises a recess disposed between projections claim 16 , wherein the claw of the stop projects into the recess of the counter-stop.18. The valve control system of further comprising:a drive wheel disposed on the outer shaft for rotationally driving the adjustable camshaft, wherein a stop disk; anda stop disk disposed on the drive wheel, the stop disk including the claw of the stop.19. The valve control system of wherein the stop is integrated into the drive wheel.20. The valve control system of wherein ...

CAM PHASER HAVING A RETENTION FEATURE FOR AIDING ASSEMBLY

A cam phaser has a stator, a rotor positioned in the stator and including a locking pin, a locking cover including a receiving feature for receiving the locking pin, a cover plate, and a check valve plate positioned between the stator and the locking cover and including a plurality of valve elements. The cam phaser also has a plurality of first openings in each of the stator, locking cover, and check valve plate, a plurality of second openings in the locking cover, and a third opening formed in the check valve plate. The cam phaser further includes a retention feature for aligning components of the cam phaser during assembly, the retention feature including one or more tabs on a first component and one or more indentations on a second component receiving the one or more tabs. 1. A cam phaser comprising:a stator;a rotor positioned in the stator and including a locking pin;a locking cover including a receiving element for receiving the locking pin;a cover plate on an opposite side of the stator from the locking cover;a check valve plate positioned between the stator and one the locking cover or the cover plate and including a plurality of valve elements;a plurality of first openings in each of the stator, locking cover, and check valve plate;a plurality of second openings in the locking cover;a third opening formed in the check valve plate; anda retention feature for aligning components of the cam phaser during assembly, the retention feature including one or more tabs on a first component and one or more indentations on a second component receiving the one or more tabs.2. The cam phaser of claim 1 , wherein the first component is the check valve plate.3. The cam phaser of claim 2 , wherein the tabs extend perpendicular to a plane of the check valve plate.4. The cam phaser of claim 2 , wherein the second component is the stator.5. The cam phaser of claim 4 , wherein the indentations are formed in a rim of the stator.6. The cam phaser of claim 2 , wherein the second ...

OLDHAM FLEXPLATE FOR CONCENTRIC CAMSHAFTS CONTROLLED BY VARIABLE CAMSHAFT TIMING

A variable camshaft timing (VCT) assembly for changing the angular position of concentric camshafts relative to a crankshaft includes a coupling plate having a first plurality of Oldham features configured to engage a first plurality of Oldham receiving features carried by a first VCT device and a second plurality of Oldham features configured to engage a second plurality of Oldham receiving features carried by a second VCT device; the coupling plate is positioned axially between the first VCT device and the second VCT device permitting the first VCT device and the second VCT device to move radially outwardly and inwardly relative to an axis of camshaft rotation. 1. A variable camshaft timing (VCT) assembly for changing an angular position of concentric camshafts relative to a crankshaft , comprising:a coupling plate, including a first plurality of Oldham features configured to engage a first plurality of Oldham receiving features carried by a first VCT device and a second plurality of Oldham features configured to engage a second plurality of Oldham receiving features carried by a second VCT device, wherein the coupling plate is positioned axially between the first VCT device and the second VCT device permitting the first VCT device and the second VCT device to move radially outwardly and inwardly relative to an axis of camshaft, rotation.2. The VCT assembly recited in claim 1 , wherein the first. VCT device is electrically-actuated and the second VCT device is hydraulically-actuated.3. The VCT assembly recited in claim 2 , further comprising a first VCT device that is coupled with an inner camshaft and a second VCT device that is coupled with an outer camshaft.4. The VCT assembly recited in claim 2 , wherein the first VCT device includes an inner plate that carries the first plurality of Oldham receiving features.5. The VCT assembly recited in claim 2 , wherein the second VCT device includes a housing that carries the second plurality of Oldham receiving features. ...

Camshaft phaser arrangement for a concentric camshaft assembly

A camshaft phaser arrangement configured for a concentric camshaft assembly having inner and outer camshafts is provided. The camshaft phaser arrangement includes a first camshaft phaser that is configured to be non-rotatably connected to both the inner and outer camshafts, and a second camshaft phaser that is configured to be non-rotatably connected to one of the inner or outer camshafts.

ARRANGEMENT FOR AXIALLY SHIFTING A CAM ASSEMBLY ON A CAM SHAFT

A cam shifting arrangement for shifting at least a first cam piece axially along a camshaft of a valve train assembly of an internal combustion engine to selectively position the cam piece in at least a first axial position or a second axial position on the cam shaft includes a shifting member arranged substantially parallel with the cam shaft and moveable to cause the first cam piece to be moved between the first axial position and the second axial position. 1: A cam shifting arrangement for shifting at least a first cam piece axially along a cam shaft of a valve train assembly of an internal combustion engine to selectively position the first cam piece in at least a first axial position or a second axial position on the cam shaft , the shifting arrangement comprising:a shifting member arranged substantially parallel with the cam shaft,wherein the shift member is moveable to cause the first cam piece to be moved between the first axial position and the second axial position.2: The arrangement of claim 1 , wherein the shifting member includes a first contact surface which claim 1 , following the shifting member being moved in a first direction claim 1 , causes the first cam piece to be moved from the first axial position to the second axial position claim 1 , andwherein the shifting member includes a second contact surface, which, following the shifting rod member being moved in a second direction, causes the first cam piece to be moved from the second axial position to the first axial position.3: The arrangement of claim 2 , wherein the shifting member is arranged inside an inner bore of the cam shaft claim 2 ,wherein the first cam piece includes a first member that extends through a first guide groove defined by the cam shaft into the inner bore of the camshaft,wherein the first contact surface contacts the first member, following the shifting member being moved in the first direction, to cause the first cam piece to be moved from the first axial position to the ...

ADJUSTABLE CAMSHAFT HAVING A PHASE ACTUATOR

An adjustable camshaft for a valve train of an internal combustion engine may include an inner shaft that is rotatable in an outer shaft, a phase shifter by which the outer shaft and/or the inner shaft are/is adjustable in a phase position formed around an axis of rotation, and a bearing portion for bearing the camshaft, via which the phase shifter can be supplied with a pressurizing medium. The inner shaft may comprise an end on which a screw flange is arranged, and a rotor of the phase shifter may be connected to the screw flange. A free end of the inner shaft comprises a duct that coincides with the axis of rotation for at least partially supplying the phase shifter with a pressurizing medium. The duct may extend at least into the bearing portion. 110.-. (canceled)11. An adjustable camshaft for a valve train of an internal combustion engine , the adjustable camshaft comprising:an outer shaft;an inner shaft that extends at least in sections within the outer shaft, wherein the inner shaft is rotatable relative to the outer shaft, the inner shaft having a free end that comprises a duct that coincides with an axis of rotation;a phase shifter by which at least one of the outer shaft or the inner shaft is adjustable in a phase position formed around the axis of rotation, the phase shifter comprising a rotor;a bearing portion for bearing the adjustable camshaft, via which the phase shifter is supplied with a pressurizing medium; anda screw flange disposed on the free end of the inner shaft, wherein the rotor of the phase shifter is connected to the screw flange via a screw element that is spaced apart from the axis of rotation,wherein the duct extends at least into the bearing portion and at least partially supplies the phase shifter with the pressurizing medium.12. The adjustable camshaft of wherein the screw flange sits on the free end of the inner shaft such that the free end extends centrally into the screw flange.13. The adjustable camshaft of wherein an annular ...

ENGINE VARIABLE CAMSHAFT TIMING PHASER WITH PLANETARY GEAR ASSEMBLY

An engine variable camshaft timing phaser () includes a sprocket () and a planetary gear assembly (). The sprocket () receives rotational drive input from an engine crankshaft. The planetary gear assembly () includes two or more ring gears (), multiple planet gears (), a sun gear (), and a wrap spring (). One of the ring gears () receives rotational drive input from the sprocket () and one of the ring gears () transmits rotational drive output to an engine camshaft. The sun gear () engages with the planet gears (). The wrap spring () experiences expansion and contraction exertions to permit advancing and retarding engine valve opening and closing, and to prevent advancing and retarding engine valve opening and closing. 110. An engine variable camshaft timing phaser () , comprising:{'b': '12', 'a sprocket () receiving rotational drive input from an engine crankshaft;'}{'b': '14', 'a planetary gear assembly () comprising{'b': 26', '28', '26', '28', '12', '26', '28, 'claim-text': [{'b': 24', '26', '28, 'a plurality of planet gears () engaged with said at least two ring gears (, );'}, {'b': 22', '24, 'a sun gear () engaged with said plurality of planet gears (); and'}, {'b': 76', '82', '84', '76', '22', '82', '84', '76, 'a wrap spring () having a pair of ends (, ), said wrap spring () interrelated with said sun gear () for causing abutment with one of said pair of ends (, ) and expansion or contraction exertions of said wrap spring ();'}, {'b': 14', '32', '82', '84', '12', '14', '82', '84', '12, 'wherein, when said planetary gear assembly () is driven by an electric motor (), abutment with one of said pair of ends (, ) permits relative rotation between said sprocket () and the engine camshaft for advancing or retarding engine valve opening and closing, and when said planetary gear assembly () is back-driven by the engine camshaft, abutment with one of said pair of ends (, ) prevents relative rotation between said sprocket () and the engine camshaft to preclude advancing ...

CAMSHAFT ADJUSTING DEVICE FOR ADJUSTING A POSITION OF AT LEAST ONE CAM SEGMENT

A camshaft adjusting device of a drive, such as a motor vehicle drive, for example, for adjusting a phase position of a cam segment may include a camshaft and a phase shifter that is operatively connected to the camshaft. The camshaft may comprise a shaft segment including an inner shaft and an outer shaft at least partially surrounding the inner shaft. The camshaft adjusting device may further comprise a drive segment for driving the shaft segment and a cam segment that is connected in a form-fitting and/or force-fitting manner to the outer shaft. The phase shifter may comprise a rotor element and a stator element. A compensating element for compensating for part tolerances between the camshaft and the phase shifter can be disposed at least in sections between the rotor element and the drive segment.” 114.-. (canceled)15. A camshaft adjusting device of a drive for adjusting a phase position of a cam segment , the camshaft adjusting device comprising:a camshaft that comprises a shaft segment having an inner shaft and an outer shaft that at least partially surrounds the inner shaft;a phase shifter that is operatively connected to the camshaft, the phase shifter comprising a rotor element and a stator element;a drive segment for driving the shaft segment;a cam segment connected in a form-fitting manner and/or in a force-fitting manner to the outer shaft; anda compensating element for compensating for component part tolerances, the compensating element disposed at least in sections between the rotor element and the drive segment, wherein the compensating element is spring-loaded by a spring element.16. The camshaft adjusting device of wherein the compensating element is a sealing element.17. The camshaft adjusting device of wherein the compensating element is a sealing ring.18. The camshaft adjusting device of wherein the compensating element is compression-spring-loaded by the spring element.19. The camshaft adjusting device of wherein the spring element extends ...

Applied-ignition internal combustion engine with variable valve drive

A system and method is provided for an at least partially variable valve drive in an internal combustion engine. In one example, the at least partially variable valve drive comprises a hydraulically adjustable actuating device which may be charged with pressurized oil via an oil pressure line which branches off from an oil circuit.

COMPOSITE PROFILE EVALUATING METHOD AND COMPOSITE PROFILE MEASURING DEVICE

A composite profile evaluating method includes an adjusting step and a composite profile detecting step. In the adjusting step, a relative position between a fixed cam and a movable cam is adjusted. In the composite profile detecting step, at least either one of a first contact element, which is displaced along a diametrical direction of the fixed cam upon contacting a cam surface of the fixed cam, and a second contact element, which is displaced integrally with the first contact element and along a diametrical direction of the movable cam upon contacting a cam surface of the movable cam, is brought into contact with the cam surface of the fixed cam or the movable cam. In such a state, the composite profile is obtained by rotating the fixed cam and the movable cam, and detecting the amounts of displacement of the first and second contact elements.

CAM SHAFT FOR A CAM SHAFT ARRANGEMENT

A cam phaser for a cam shaft arrangement including an inner cam shaft and an outer cam shaft arranged concentrical relative to the inner cam shaft, the cam phaser including at least one rotor; at least one stator; and at least one compensation element configured to compensate axial and/or radial and/or angular tolerances, wherein the stator is connectable torque proof at least indirectly through a drive gear with the outer cam shaft and the rotor is connectable torque proof with the inner cam shaft, wherein the drive gear is separate from the stator and attachable torque proof at the outer cam shaft, wherein the stator is rotatably supportable on the inner cam shaft, wherein plural compensation elements are provided which are arranged evenly distributed in a circumferential direction, wherein the compensation elements are configured torsion stiff in the circumferential direction and attached between the stator and the drive gear. 1. A cam phaser for a cam shaft arrangement including an inner cam shaft and an outer cam shaft arranged concentrical relative to the inner cam shaft , the cam phaser comprising:at least one rotor;at least one stator; andat least one compensation element configured to compensate axial or radial or angular tolerances,wherein the at least one stator is connectable torque proof at least indirectly through a drive gear with the outer cam shaft and the at least one rotor is connectable torque proof with the inner cam shaft,wherein the drive gear is separate from the at least one stator and attachable torque proof at the outer cam shaft,wherein the at least one stator is rotatably supportable on the inner cam shaft,wherein plural compensation elements are provided which are advantageously arranged evenly distributed in a circumferential direction, andwherein the compensation elements are configured torsion stiff in the circumferential direction and arranged and attached between the at least one stator and the drive gear that is axially offset ...

CONTINUOUS VARIABLE VALVE TIMING APPARATUS AND ENGINE PROVIDED WITH THE SAME

A continuous variable valve timing apparatus may include a camshaft, a cam device on which a cam is formed respectively and of which the camshaft is inserted thereto, wherein a relative phase angle with respect to the camshaft is variable, an inside bracket configured to transmit rotation of the camshaft to the cam device, a lifter in which the inside bracket is rotatably inserted therein and on which a cylinder opening and a shaft opening are formed thereon, a control shaft parallel to the camshaft and to which a control rod, inserted into the shaft opening, is eccentrically formed, a control cylinder on which a control rod opening where the control rod is inserted therein is formed and inserted into the cylinder opening, a guide portion guiding movement of the lifter and a controller selectively rotating the control shaft, wherein the lifter may move. 1. A continuous variable valve timing apparatus comprising:a camshaft;a cam device on which a cam is formed respectively and of which the camshaft is inserted thereto, wherein a relative phase angle with respect to the camshaft is variable;an inside bracket configured to transmit rotation of the camshaft to the cam device;a lifter in which the inside bracket is rotatably inserted therein and on which a cylinder opening and a shaft opening are formed thereon;a control shaft parallel to the camshaft and to which a control rod, inserted into the shaft opening, is eccentrically formed;a control cylinder on which a control rod opening where the control rod is inserted therein is formed and inserted into the cylinder opening;a guide portion guiding movement of the lifter; anda controller selectively rotating the control shaft, wherein the lifter is configured to move.2. The continuously variable valve timing apparatus of claim 1 , wherein the lifter includes:a lifter body in which the inside bracket is rotatably inserted therein; anda lifter head on which a guide opening is formed thereto and connected with the lifter body ...

VALVE TRAIN OF AN INTERNAL COMBUSTION ENGINE

A valve train of an internal combustion engine may include a camshaft, first and second cams, a rocker arm assembly having a displacement bolt, which may be adjustable between at least first and second positions in the axial direction and on which at least one cam roller, may be mounted in an axially fixed and rotatable manner, wherein the displacement bolt may be mounted in associated bearing lugs of the rocker arm assembly, a guide contour arranged on the camshaft and having first and second guide tracks, a switching pin, which may be arranged in the displacement bolt and which may optionally engage with the first or second guide track to adjust the displacement bolt between the first and second positions. In the first and second positions, the cam roller may cooperate with the first and second cams, respectively. First and second catch recesses may be provided on the displacement bolt. A catch device may engage with a catch element, which may be biased into the first or second catch recess and which may secure the displacement bolt in the first or second position. The first and second guide tracks may cross one another in a crossing region. A third catch recess may be provided between the first and second catch recesses, wherein a first catch protuberance may be arranged between the first and the third catch recesses, and a second catch protuberance may be arranged between the second and the third catch recesses, wherein the catch element may engage with the third catch recess in the crossing region.

METHOD FOR PRODUCING AN ADJUSTABLE CAMSHAFT AND ADJUSTABLE CAMSHAFT

An adjustable camshaft, which can be utilized in a motor vehicle, may include at least one fixed cam arranged rotationally fixed on at least one outer shaft segment and at least one adjusting cam arranged rotationally fixed to an inner shaft extending concentrically within the outer shaft segment. A method for producing such an adjustable camshaft may involve arranging an outer shaft segment on an inner shaft, generating a surface modification on a surface of the inner shaft to generate at least one arranging section, arranging a fixed cam on at least one section of the outer shaft segment, and arranging the adjusting cam on the arranging section of the inner shaft. 110.-. (canceled)11. A method for producing an adjustable camshaft of a motor vehicle , wherein the adjustable camshaft comprises a fixed cam disposed rotationally-fixed on an outer shaft segment and an adjusting cam disposed rotationally-fixed to an inner shaft extending concentrically within the outer shaft segment , the method comprising:positioning the outer shaft segment on the inner shaft;generating a surface modification on a surface of the inner shaft to generate an arranging section;positioning the fixed cam on a section of the outer shaft segment; andpositioning the adjusting cam on the arranging section of the inner shaft.12. The method of wherein the generation of the surface modification occurs by way of a material elevation.13. The method of wherein the material elevation is generated by means of rolling.14. The method of wherein the fixed cam is a first fixed cam and the outer shaft segment is a first outer shaft segment claim 11 , the method further comprising:positioning a second fixed cam adjacent to the adjusting cam; andpositioning a second outer shaft segment on the inner shaft adjacent to the second fixed cam, wherein the second fixed cam is disposed on the second outer shaft segment.15. The method of further comprising connecting the fixed cam to the outer shaft segment in at least ...

VALVE TRAIN FOR ACTUATING GAS EXCHANGE VALVES OF AN INTERNAL COMBUSTION ENGINE

A valve train for actuating gas exchange valves of an internal combustion engine may include a first camshaft that is received such that it can be rotated in a first shaft axis, and a second camshaft that is received such that it can be rotated in a second shaft axis. At least one of the camshafts may be configured as an adjustable camshaft that comprises an outer shaft in which an inner shaft is received such that it can be rotated. At least one of the camshafts may be drive-connected via a drive means to a crankshaft of the internal combustion engine. A phase shifting member may be provided by way of which the phase position of at least one inner shaft can be changed relative to the phase position of at least one outer shaft of the camshaft. The phase shifting member may comprise an arrangement that is spaced apart from both shaft axes.” 111.-. (canceled)12. A valve train for actuating gas exchange valves of an internal combustion engine , the valve train comprising:a first camshaft received such that the first camshaft is rotatable in a first shaft axis;a second camshaft received such that the second camshaft is rotatable in a second shaft axis, wherein at least one of the first camshaft or the second camshaft is configured as an adjustable camshaft and comprises an outer shaft in which an inner shaft is rotatably received, wherein at least one of the first camshaft or the second camshaft is drive-connected via a drive means to a crankshaft of the internal combustion engine; anda phase shifting member by way of which a phase position of the inner shaft is changeable relative to a phase position of the outer shaft, wherein the phase shifting member includes an arrangement spaced apart from the first and second shaft axes.13. The valve train of wherein the phase shifting member comprises a stator and a rotor claim 12 , wherein the stator and the rotor are rotatable in a common shifting axis claim 12 , the common shifting axis being spaced apart from and parallel to ...

VALVE TRAIN FOR AN INTERNAL COMBUSTION ENGINE

The present disclosure describes a valve train for an internal combustion engine. The valve train includes a camshaft with a first cam and a second cam, a rocker lever assembly with a shifting pin that is adjustable in an axial direction between at least two positions, a cam follower mounted on the shifting pin, an adjusting device for adjusting a control pin arranged in the shifting pin, and a guide contour arranged on the camshaft having a first guide track and a second guide track intersecting the first guide track in an X-like manner. The control pin engages into the guide tracks and adjusts the shifting pin to adjust the cam follower. The adjusting device includes a control rod that is shiftable parallel to the shifting pin and contacts the control rod. 1. A valve train for an internal combustion engine , comprising:a camshaft with a first cam and a second cam arranged adjacent thereto,a rocker lever assembly with a shifting pin that is adjustable in an axial direction between at least two positions, on which a cam follower is mounted,an adjusting device for adjusting a control pin arranged in the shifting pin,a guide contour arranged on the camshaft having a first guide track and a second guide track intersecting the first guide track in an X-like manner,the control pin engages into the first guide track or the second guide track and adjusts the shifting pin between the at least two positions, so that the cam follower in a first position of the shifting pin interacts with the first cam and in a second position of the shifting pin interacts with the second cam, andthe adjusting device including a control rod that is shiftable parallel to the shifting pin having a first control region, a second control region and a neutral region arranged in between in the axial direction, wherein the control pin upon contact with the first control region is adjusted into the first guide track and upon contact with the second control region is adjusted into the second guide ...

Lean-burn engine

In a lean-burn engine equipped with a turbocharger, a responsiveness of a super-charging pressure in a lean region is enhanced by control of a valve timing of an exhaust valve while a combustion state is restrained from varying. A variable valve mechanism that can change an opening timing of the exhaust valve while keeping a closing timing of the exhaust valve constant, is included in the lean-burn engine. When a target operation point is located in the lean region, and when an actual supercharging pressure is lower than a target supercharging pressure, supercharging pressure increasing control that advances the opening timing while keeping the closing timing constant is executed by operating the variable valve mechanism.

VARIABLE VALVE DRIVE

The present disclosure relates to a variable valve drive, in particular with a sliding cam system, for an internal combustion engine. The variable valve drive has a shaft and a cam carrier which is arranged rotationally conjointly and axially displaceably on the shaft and which has a first cam and a second cam. The variable valve drive has an actuator device for axially displacing the cam carrier, and has a carrying device which at least partially engages around a lever axle of a force transmission device and carries the actuator device. The variable valve drive can offer the advantage that an arrangement of the actuator device which is expedient in terms of structural space is made possible in the region of the lever axle. At the same time, support of the actuator device by means of the carrying device on the lever axle can stiffen the flexible lever axle by means of the engaging-around configuration. 1. A variable valve drive , in particular with a sliding cam system , for an internal combustion engine , comprising:a shaft;a cam carrier which is arranged rotationally conjointly and axially displaceably on the shaft and which has a first cam and a second cam;a force transmission device with a lever axle and with a first force transmission element which is pivotable about the lever axle and which, in a manner dependent on an axial position of the cam carrier, selectively produces an operative connection between the first cam and a gas exchange valve of the internal combustion engine or between the second cam and the gas exchange valve;an actuator device for axially displacing the cam carrier; anda carrying device which at least partially engages around the lever axle and carries the actuator device.2. The variable valve drive according to claim 1 , wherein the actuator device includes a first actuator and a second actuator claim 1 , the first and second actuators received at least partially in the lever axle or carried by the carrying device outside the lever axle.3 ...

VARIABLE VALVE DRIVE

The disclosure relates to a variable valve drive, in particular with a sliding cam system, for an internal combustion engine. The variable valve drive has a cam carrier which has a first and second cam and a first, second, and third engagement track. A first actuator is designed to engage into the first engagement track in order to displace the cam carrier in a first axial direction. A second actuator is designed to engage into the second engagement track in order to displace the cam carrier in a second axial direction which is opposite to the first axial direction, and to engage into the third engagement track in order to displace the cam carrier in the first axial direction. The variable valve drive can have the advantage that, even in the event of a failure of the first actuator, a displacement of the cam carrier that is normally effected by means of the first actuator is possible by means of the second actuator. 1. A variable valve drive comprising:a shaft;a cam carrier which is arranged rotationally conjointly and axially displaceably on the shaft and which has a first cam, a second cam, a first engagement track, a second engagement track, and a third engagement track;a first actuator which is designed to engage into the first engagement track in order to displace the cam carrier in a first axial direction; anda second actuator which is designed to engage into the second engagement track in order to displace the cam carrier in a second axial direction which is opposite to the first axial direction, and to engage into the third engagement track in order to displace the cam carrier in the first axial direction.2. The variable valve drive according to claim 1 , wherein:an engagement of the first actuator into the first engagement track effects a displacement of the cam carrier from a first axial position into a second axial position; andan engagement of the second actuator into the third engagement track effects a displacement of the cam carrier from the first ...

CAM PHASING ASSEMBLIES WITH ELECTROMECHANICAL LOCKING CONTROL AND METHOD THEREOF

A cam phasing control motor assembly, including: an electric motor with a hollow drive shaft; an actuating pin passing through the hollow drive shaft; an engagement feature; and a displacement assembly. For a camshaft locking mode: the displacement assembly displaces the actuating pin in a first axial direction to non-rotatably connect the engagement feature with a bolt non-rotatably connected to a camshaft; and the camshaft is arranged to non-rotatably connect to an input gear for a gearbox phasing unit, the input gear arranged to receive torque from an engine. For a phase adjusting mode: the displacement assembly displaces the actuating pin in a second axial direction, opposite the first axial direction, to disconnect the engagement feature from the bolt; and the camshaft is arranged to rotate with respect to the input gear. 1. A cam phasing control motor assembly , comprising:an electric motor with a hollow drive shaft;an actuating pin passing through the hollow drive shaft;an engagement feature; and, [ the displacement assembly displaces the actuating pin in a first axial direction to non-rotatably connect the engagement feature with a bolt non-rotatably connected to a camshaft; and,', 'the camshaft is arranged to non-rotatably connect to an input gear for a gearbox phasing unit, the input gear arranged to receive torque from an engine; and,, 'for a camshaft locking mode, the displacement assembly displaces the actuating pin in a second axial direction, opposite the first axial direction, to disconnect the engagement feature from the bolt; and,', 'the camshaft is arranged to rotate with respect to the input gear., 'for a phase adjusting mode], 'a displacement assembly, wherein2. The cam phasing motor control assembly of claim 1 , wherein: an actuator; and,', 'a resilient element;, 'the displacement assembly includesfor the camshaft locking mode, the actuator displaces the actuating pin and the engagement feature in the first axial direction; and,for the phase ...

TIMING WHEEL FOR A CAMSHAFT PHASER ARRANGEMENT FOR A CONCENTRIC CAMSHAFT ASSEMBLY

A camshaft phaser arrangement configured for a concentric camshaft assembly having inner and outer camshafts is provided. The camshaft phaser arrangement includes a first camshaft phaser, a second camshaft phaser, a coupling, and at least one timing wheel connected to at least one of the first or second camshaft phaser. Each of the camshaft phasers is configured to be connected to either the inner or the outer camshaft. The at least one timing wheel defines at least one cutout that is configured to receive at least a portion of the coupling. 1. A camshaft phaser arrangement configured for a concentric camshaft assembly having inner and outer camshafts , the camshaft phaser arrangement comprising:a first camshaft phaser configured to be connected to one of the inner or outer camshafts;a second camshaft phaser configured to be connected to the other of the inner or outer camshafts; the second camshaft phaser axially adjacent to the first camshaft phaser;at least one timing wheel connected to at least one of the first or second camshaft phaser; and,the at least one timing wheel defining at least one cutout, the at least one cutout configured to receive at least a portion of a coupling that torsionally couples the first and second camshaft phasers.2. The camshaft phaser arrangement of claim 1 , wherein the at least one timing wheel comprises a first timing wheel and a second timing wheel claim 1 , the first timing wheel axially adjacent to the second timing wheel.3. The camshaft phaser arrangement of claim 1 , wherein the at least one cutout has an angular span that is equal to or greater than a range of authority of the first or second camshaft phaser.4. The camshaft phaser arrangement of claim 1 , wherein the first and second camshaft phasers include at least one of a hydraulic camshaft phaser or an electric camshaft phaser.5. The camshaft phaser arrangement of claim 1 , wherein the at least one timing wheel comprises at least one aperture configured to receive at ...

COUPLING FOR A CAMSHAFT PHASER ARRANGEMENT FOR A CONCENTRIC CAMSHAFT ASSEMBLY

A camshaft phaser arrangement configured for a concentric camshaft assembly having inner and outer camshafts is provided. The camshaft phaser arrangement includes a first camshaft phaser, a second camshaft phaser, a coupling, and at least one timing wheel connected to at least one of the first or second camshaft phaser. Each of the camshaft phasers is configured to be connected to either the inner or the outer camshaft. The coupling includes a coupling ring and at least one coupling pin that torsionally connects the first camshaft phaser to the second camshaft phaser. The coupling provides for radial and axial movement between the first camshaft phaser and the second camshaft phaser. 1. A camshaft phaser arrangement configured for a concentric camshaft assembly having inner and outer camshafts , the camshaft phaser arrangement comprising:a first camshaft phaser configured to be connected to one of the inner or outer camshafts;a second camshaft phaser configured to be connected to the other of the inner or outer camshafts;the first camshaft phaser axially adjacent to the second camshaft phaser; and, [ at least one first radial slot configured to: (1) connect the coupling ring to one of the first or second camshaft phaser and, (2) provide for a first radial movement between the first camshaft phaser and the second camshaft phaser; and,', 'at least one second radial slot configured to provide for: (1) a second radial movement between the first camshaft phaser and the second camshaft phaser, and (2) an axial movement between the first camshaft phaser and the second camshaft phaser; and,, 'a coupling ring having, 'at least one coupling pin, a first end received by the at least one second radial slot, and a second end connected to the other of the first or second camshaft phaser., 'a coupling arranged to torsionally connect the first camshaft phaser to the second camshaft phaser, the coupling comprising2. The camshaft phaser arrangement of claim 1 , wherein a pathway for ...

Valve operating cam drive for combustion engines

The valves of the engine are operated by one of a number of cams (4a to 4c) which are integral with a sleeve (5) and which are located next to one another. The sleeve is connected to the camshaft (6) by e.g. splines so that it rotates with the shaft but can be moved axially. The sleeve is moved axially by rods (15,18), which can be fed-in radially towards the camshaft, and which engage with axial cam faces (9,10) on the endfaces of the sleeve. The sleeve is positioned on the camshaft by a spring-loaded ball (23) which engages with grooves in the sleeve bore.

Camshaft assembly

The invention relates to a camshaft assembly comprising an inner shaft (24), an outer tube (22) rotatable relative to the inner shaft (24), and two groups of cams (14, 16) mounted on the outer tube, the first group of cams (14) being fast in rotation with the outer tube, and the second group (16) being rotatably mounted on the outer surface of the tube (22) and being connected for rotation with the inner shaft (24) by means of connecting members that pass through circumferentially elongated slots in the outer tube (22). In the invention, the outer tube (22) surrounds the inner shaft (24) with clearance and the members (20) connecting different ones of the cams (16) of the second group to the inner shaft (24) are inclined relative to one another and act to locate the axis of the inner shaft (24) relative to the outer tube (22).

Inner camshaft of SCP assembly receives drive via sleeve on outer tube

A Single Camshaft Phaser (SCP) assembly comprises an inner shaft 12 and an outer tube 14. A sleeve 20 is rotatably mounted on the outer tube 14, and is connected to impart drive to the inner shaft 12 by means of a pin 24 passing with clearance through a slot in the outer tube 14. The connection between the inner shaft 12 and the phaser 30 thus no longer lies on the axis to the shaft, and it is possible to provide a drive coupling 40 between the inner output member 42 of the phaser 30 and the outer tube 14 of the camshaft. A self retaining fastener (50, figure 3) in the bore of the camshaft tube 14 may control the axial position of the inner shaft 12. The sleeve 20 driving the inner shaft 12 may act as a bearing supporting the camshaft tube 14 in a pillar block in the engine.

Oil feed arrangement for an scp camshaft

A camshaft is formed of an inner shaft (12), an outer tube (14) surrounding and rotatable relative to the inner shaft. Two groups of cam lobes (16, 18) are mounted on the outer tube. The cam lobes (16) of the first group being fast in rotation with the outer tube and the cam lobes (18) of the second group are rotatable relative to the outer tube (14) In the invention, one end of the camshaft (10) communicates with a cavity (31) in the engine to which a lubricant is supplied under pressure. The lubricant enters into the camshaft in an axial direction and serves to pressurise an annular passage between the inner shaft (12) and the outer tube (14) via which the lubricant is applied to the interface between the outer tube (14) and the cam lobes (18) of the second group.

Camshaft

Dynamic valve timing adjustment mechanism for internal combustion engines

A cam phaser is disclosed for adjusting the angular position of a camshaft relative to a crankshaft. In a first embodiment, a rotatable camshaft has an interior passageway and at least one cam operative to effect actuation of an engine valve. A first drive member is connectable to the crankshaft for rotational movement therewith. The first drive member is independently rotatably associated with the camshaft. A piston member is axially moveably disposed within the camshaft interior passageway and associated with the camshaft for rotation therewith. The piston member is further associated with the first drive member for rotation therewith and axial movement relative thereto. Axial movement of the piston member effects a change in the angular position of the first drive member. In a second embodiment, a rotatable tubular member has an interior passageway. A first drive member connectable to one or the other of a crankshaft or camshaft for rotational movement therewith is independently rotatably associated with the tubular member. A second drive member connectable to the other of a camshaft or crankshaft for rotational movement therewith is rotatably fixed relative to the tubular member. The first drive member is independently angularly positionable relative to the second drive member. A piston member is axially moveably disposed within the tubular member interior passageway and associated with the tubular member for rotation therewith. The piston member is further associated with the first drive member for rotation therewith and axial movement relative thereto. Axial movement of the piston member effects a change in the angular position of the first drive member relative to the second drive member.

Camshaft

The camshaft (1) has an inner shaft (3) coaxially arranged in an outer shaft (2), and cams rotated against each other. The cams are fixedly connected with the inner shaft and the outer shaft, respectively. Phase adjusters (7, 8) adjust phase conditions of the inner and outer shafts to adjust the cams relative to a drive e.g. crankshaft. Adjustable hydraulic valves (9, 10) of the phase adjusters are arranged adjacent to each other in the inner shaft in an axial direction. An actuation device (12) controls the hydraulic valves and has electromagnets (13, 14) to actuate the hydraulic valves.

液力可变气门正时机构

本发明公开了一种液力可变气门正时机构，属于发动机配气正时技术领域，包括主凸轮轴和主凸轮轴齿轮，所述主凸轮轴上设有主凸轮；所述主凸轮轴为空心结构且其内部同轴安装有副凸轮轴，所述副凸轮轴的一端设有摆臂，所述副凸轮轴上偏心安装有副凸轮，所述副凸轮穿出所述主凸轮轴外周且靠近所述主凸轮的一端设置；所述主齿轮轴齿轮上设有底座，所述底座上设有机油进油口，所述底座内滑动安装有推杆，所述推杆的一端伸出所述底座且抵靠在所述摆臂上，所述底座内还设有用于使所述推杆回位的弹性回位元件。本发明保证了发动机在高转速时的综合性能，提高了发动机经济性、动力性和排放性能，在发动机节能减排方面有积极作用。

Continuous variable vavle duration apparatus and engine provided with the same

본 발명은 밸브의 개폐 듀레이션을 가변할 수 있는 연속 가변 밸브 듀레이션 장치에 관한 것이다. 본 발명에 의한 연속 가변 밸브 듀레이션 장치는 캠 축; 캠이 형성되고, 상기 캠 축이 삽입되며, 상기 캠 축에 대한 상대적인 위상이 가변 될 수 있고 캠 키가 형성된 캠 유닛: 제1, 2 슬라이딩 홀이 각각 형성되고 상기 캠 축의 회전을 상기 캠 유닛에 전달하는 이너 브라켓; 상기 이너 브라켓이 회전 가능하게 삽입되며, 상기 캠 축과의 상대적인 위치가 가변되는 슬라이더 하우징; 상기 슬라이더 하우징의 위치를 선택적으로 이동시키는 제어부; 상기 캠 키가 슬라이딩 가능하게 삽입되는 캠 키 슬롯이 형성되며, 상기 제2 슬라이딩 홀에 회전 가능하게 삽입되는 캠 핀; 및 상기 제1 슬라이딩 홀에 회전 가능하게 삽입되며, 상기 캠 축에 슬라이딩 가능하게 삽입되는 슬라이더 핀;을 포함한다. The present invention relates to a continuously variable valve duration device capable of varying the opening and closing durations of the valves. The continuous variable valve duration device according to the present invention includes a cam shaft; Wherein the cam shaft is inserted, the relative phase with respect to the camshaft can be varied, and the cam unit formed with the cam key: first and second sliding holes are respectively formed, and rotation of the camshaft is transmitted to the cam unit Inner bracket to transmit; A slider housing into which the inner bracket is rotatably inserted and whose position relative to the cam shaft is variable; A controller for selectively moving the position of the slider housing; A cam pin formed with a cam key slot into which the cam key is slidably inserted and rotatably inserted into the second sliding hole; And a slider pin rotatably inserted into the first sliding hole and slidably inserted into the cam shaft.

Engine having variable valve timing device

본 발명에 따른 가변 밸브 타이밍 장치를 구비한 엔진에 의하면, 포트를 개폐하도록 배치되는 밸브, 상기 포트가 닫히도록 상기 밸브를 탄성지지하는 탄성부재, 회전하면서 상기 포트를 열도록 상기 밸브를 움직이는 제1캠이 형성된 제1캠샤프트, 회전하면서 상기 포트를 닫도록 상기 밸브를 움직이는 제2캠이 형성된 제2캠샤프트, 상기 제1캠샤프트의 회전을 진각 또는 지각시키는 제1가변회전기구, 및 상기 제2캠샤프트의 회전을 진각 또는 지각시키는 제2가변회전기구를 포함할 수 있다. According to an engine provided with a variable valve timing device according to the present invention, there is provided an engine having a valve arranged to open and close a port, an elastic member elastically supporting the valve so that the port is closed, A first camshaft having a cam formed therein, a second camshaft having a second cam that rotates while moving the valve to close the port, a first variable rotation mechanism for advancing or retarding rotation of the first camshaft, And a second variable rotation mechanism for advancing or retarding the rotation of the second camshaft.

能调节的凸轮轴

本发明涉及一种能调节的凸轮轴（1），所述凸轮轴（1）具有内轴（2）和同轴地围绕所述内轴（2）的外轴（3）。所述能调节的凸轮轴（1）还具有包括凸轮主体（5）和环形轴环（6）的凸轮（4），所述环形轴环（6）与所述凸轮主体（5）轴线地分隔开，并连接到所述凸轮主体，其中所述环形轴环（6）滑动地布置有位于所述外轴（3）上的径向间隙（11）。本发明的本质在于在所述环形轴环（6）的区域中，密封件（15）提供用于密封所述间隙（11）。

가변 밸브 타이밍 기어

가변 밸브 타이밍 기어는 충전 사이클 제어용 흡배기 밸브를 포함하는 피스톤 구조의 내연 기관에 적합하다. 흡배기 밸브는 이런 목적을 위해 흡배기 캠을 가진 캠축에 의해 작동된다. 흡배기 밸브의 밸브 오버랩을 실시하기 위해 흡배기 밸브는 서로에 대해 회전 가능하게 구성되며, 이를 위해 제어 요소가 제공된다. 이 제어 요소에는 캠 축의 보어 내에 축방향으로 이동 가능하게 배치되며 핀과 제어 가이드로 구성되는 드라이버를 거쳐서 배기캠에 대해 흡기 캠을 회전시키는 제어 요소가 제공된다.

Mutiple variable valve lift appratus

The present invention relates to a multi-step variable valve lift apparatus which prevents interference between components and improves reliability for a cam shift. According to an embodiment of the present invention, the multi-step variable valve lift apparatus comprises: a first moving cam which is formed in a hollow cylindrical shape into which a camshaft is inserted, moves in an axial direction while rotating with the camshaft, and has a first cam guide protrusion and a plurality of cams realizing different valve lifts; a second moving cam which is formed in a hollow cylindrical shape into which the camshaft is inserted, moves in an axial direction while rotating with the camshaft, and has a second cam guide protrusion and a plurality of cams realizing different valve lifts; a first operating unit to selectively guide the first cam guide protrusion to move the first moving cam in a first direction; a second operating unit to selectively guide the second cam guide protrusion to move the second moving cam in a second direction; a control unit to control operations of the first operating unit and the second operating unit; and a valve opening/closing unit to come in contact with any one cam among the cams to open and close a valve. At least two pins are disposed on the first operating unit and the second operating unit to guide the first and the second cam guide protrusion. An interference prevention pin which is one among the pins has a diameter relatively larger than the other pins.

Engine that actively varies compressioin expansion ratio

본 발명의 실시예에 따른 압축 팽창비를 능동적으로 가변시키는 엔진은, 흡기밸브를 리프트시키는 흡기캠이 형성된 흡기캠샤프트, 배기밸브를 리프트시키는 배기캠이 형성된 배기캠샤프트, 상기 흡기캠샤프트의 일단부에 장착되어 상기 흡기캠샤프트의 회전을 지각시키거나 진각시키는 흡기밸브가변타이밍유닛, 상기 배기캠샤프트의 일단부에 장착되어 상기 배기캠샤프트의 회전을 지각시키거나 진각시키는 배기밸브가변타이밍유닛, 상기 흡기캠샤프트의 타단부에 장착되어 상기 흡기캠샤프트의 리프트듀어레이션(지속)을 가변시키는 흡기밸브가변듀어레이션유닛, 및 상기 배기캠샤프트의 타단부에 장착되어 상기 배기캠샤프트의 리프트듀어레이션(지속)을 가변시키는 배기밸브가변듀어레이션유닛을 포함한다. 따라서, 연속 가변 밸브 타이밍유닛과 가변 밸브 듀어레이션 유닛을 흡기캠샤프트와 배기캠샤프트에 동시에 적용함으로써 충진효율을 향상시키고, 펌핑손실을 저감시키며, 팽창효율을 향상시키고, 실 압축비를 가변시키며, 압축 팽창비를 능동적으로 가변시킬 수 있다. An engine for actively varying the compression expansion ratio according to an embodiment of the present invention includes an intake cam shaft having an intake cam for lifting an intake valve, an exhaust cam shaft having an exhaust cam for lifting an exhaust valve, and one end of the intake cam shaft. An intake valve variable timing unit mounted to one end of the exhaust cam shaft to detect or advance the rotation of the intake cam shaft; An intake valve variable duration unit mounted at the other end of the intake camshaft to vary the lift duration (continuity) of the intake camshaft, and a lift duration of the exhaust camshaft mounted at the other end of the exhaust camshaft ( And an exhaust valve variable duration unit for varying the duration. Therefore, the continuous variable valve timing unit and the variable valve duration unit are simultaneously applied to the intake cam shaft and the exhaust cam shaft to improve filling efficiency, reduce pumping loss, improve expansion efficiency, vary the actual compression ratio, and compress The expansion ratio can be actively varied.

Adjustable camshaft

本发明涉及用于内燃机的可调节凸轮轴(1)，所述可调节凸轮轴(1)具有：支撑轴(11)，所述支撑轴(11)在旋转轴线(10)的方向上延伸；其中具有至少一个凸轮元件(13)的至少一个凸轮组件(12)被安装在支撑轴(11)上从而可以在旋转轴线(10)的方向上位移，凸轮组件(12)有可能在至少两个轴向锁扣位置下锁扣至支撑轴(11)；并且其中设置通过弹簧元件(14)受到预应力的至少一个锁扣元件(15)和至少一个锁扣元件接收部(16)以形成锁扣位置，其结果是锁扣元件(15)可以在锁扣位置下锁扣至锁扣元件接收部(16)。根据本发明，弹簧元件(14)和通过弹簧元件(14)受到预应力的锁扣元件(15)容纳在凸轮组件(12)中，并且至少一个锁扣元件接收部(16)设置在支撑轴(11)上。

Device for varying opening and closing timing of valve

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

A kind of axial displacement multi-mode lever Variabale valve actuation system

一种轴向移动式多模式杠杆式可变气门驱动系统，属于发动机气门驱动领域。它主要包括凸轮轴和凸轮轴轴套、轴向移动机构、气门调节杠杆、气门控制机构等。凸轮轴轴套上至少设置有第一凸轮和第二凸轮，通过使用轴向移动机构，实现发动机二冲程驱动模式、四冲程驱动模式、二冲程制动模式、四冲程制动模式等多种模式之间的转换，进一步通过与气门控制机构配合使用，最终实现了发动机在不同工况下的最佳换气，达到综合提高发动机动力性、燃油经济性、排放性和制动安全性的目的。本发明是面向实际应用提出的，可靠性高、结构紧凑，降低了系统对各机构的要求，各机构均采用较为成熟技术，系统短期内实用化潜力高，具有良好的应用前景。

Variable valve device for an internal combustion engine

스플릿 가변 기능을 갖는 캠 위상 가변 기구를 구비한 내연 기관용 가변 밸브 장치에 있어서, 내연 기관의 운전이 소정의 극저속도 극저부하 영역에 있을 때에는, 제2 흡기 밸브의 폐쇄 시기가 최지각 위치가 되는 위상보다도 더 진각된 위치(S 1 )로 제2 흡기 캠의 위상이 제어된다. In a variable valve device for an internal combustion engine having a cam phase variable mechanism having a split variable function, the phase at which the closing timing of the second intake valve becomes the most angular position when the operation of the internal combustion engine is in a predetermined extremely low speed extremely low load region. The phase of the second intake cam is controlled to a more advanced position S 1 .

A concentric camshaft arrangement

一种同心凸轮轴装置，其包括内轴('12)、绕该内轴('12)同心布置且可转动地支撑在汽缸盖('21)中的外管('14)。安装第一组凸角('16)至外管以随该外管('14)转动，并且第二组凸角('18)通过轴承轴颈可转动地支撑在该外管('14)上且与该内轴连接以随该内轴('12)转动。该外管('14)借助于滚动轴承('42)被支撑在该汽缸盖('21)中，并且设置给油机构('22,'28)以便供应油来润滑该第二组凸轮凸角('18)的轴承轴颈。至少部分给油机构由该外管('14)的外表面('20)和汽缸盖('21)的内表面('22)之间的且轴向端部被密封('48,'50)的径向游隙限定，该径向游隙比在该滚动轴承('42)处的任何径向游隙都大，从而该凸轮轴上的负载至少主要由该滚动轴承('42)承担。

Variable valve device of internal combustion engine

一种内燃机的可变气门装置，在轴部件(17)的外侧设置有第一凸轮(20)、以及设置为可在周向上变位的与该第一凸轮成对的第二凸轮(22a)，在使第二凸轮的相位相对于第一凸轮变更的构造中，构成为第二凸轮的凸轮面(22c)为比第一凸轮的凸轮面的凸轮宽度(b)大的凸轮宽度尺寸(a)。

Valve control of an internal combustion engine

Valve train of an internal combustion engine

Valve drive device of internal combustion engine

본 발명에 따른 내연 기관의 밸브 구동 장치는 서로 다른 다수의 스트로크 프로파일을 구비한 가스 교환 밸브의 작동을 가능하게 한다. 캠축 상에 다수의 캠트랙을 갖는 캠은 회전 불가능하나, 축 방향으로 이동할 수 있게 놓인다. 상기 캠에는 스트로크 프로파일이 마련되며, 스트로크 프로파일에는 작동 부재가 결합되어 캠을 축 방향으로 이동시키며, 하나의 캠축으로부터 다른 캠축으로의 전환이 달성된다. The valve drive device of an internal combustion engine according to the present invention enables operation of a gas exchange valve having a plurality of different stroke profiles. The cam having a plurality of cam tracks on the camshaft is not rotatable but is placed so as to be movable in the axial direction. The cam is provided with a stroke profile, and an actuating member is engaged with the stroke profile to move the cam in the axial direction, and switching from one camshaft to another is achieved.

Valve driving device for internal combustion engine

Sliding cam arrangement for variable actuating gas exchange valves of an internal combustion engine

本发明涉及一种用于对内燃发动机的换气气门进行可变致动的滑动凸轮配置，该滑动凸轮配置具有一个凸轮轴（6），该凸轮轴具有带一外齿部（12）的多个齿部区域（10），其中，这些齿部区域（10）分别与一个凸轮承载件（16）的一个内齿部（14）相啮合，其中，该凸轮承载件（16）的基圆半径R2与该凸轮轴（6）的外齿部（12）的顶圆半径R1之比满足R2/R1<1.55。

Internal combustion engine with a valve train

Brennkraftmaschine mit einem eine Grundnockenwelle (1.1) aufweisenden Ventiltrieb, wobei auf der Grundnockenwelle (1.1) mindestens ein Nockenträger (1.2) drehfest und axial verschiebbar angeordnet ist, wobei jeder Nockenträger (1.2) durch zwei Stellglieder (2) axial verschoben werden kann und wobei die zwei Stellglieder (2) mit dem Zylinderkopf (3) der Brennkraftmaschine verbunden sind, dadurch gekennzeichnet, dass zu einer Seite jedes Stellglieds (2) eine Montageplatte (2.8) ausgebildet ist, dass an dem Zylinderkopf (3) für jedes Stellglied (2) eine Montagefläche (3.4) ausgebildet ist, so dass die zu einer Seite ausgebildeten Montageplatten (2.8) der Stellglieder (2) abwechselnd nach links und nach rechts abfallend an dem Zylinderkopf (3) befestigt werden, dass in jeder Montagefläche (3.4) genau eine Schmiermittelbohrung (3.7) ausgebildet ist, und dass die Stellglieder (2) zwei Bohrungen (2.7) für Schmiermittel aufweisen, so dass genau eine der zwei Bohrungen (2.7) für Schmiermittel der Stellglieder (2) in beiden möglichen Montagepositionen mit der genau einen Schmiermittelbohrung (3.7) der Montagefläche (3.4) fluchtet. Internal combustion engine with a valve train having a basic camshaft (1.1), at least one cam carrier (1.2) being arranged on the basic camshaft (1.1) in a rotationally fixed and axially displaceable manner, each cam carrier (1.2) being axially displaceable by two actuators (2), and the two actuators (2) are connected to the cylinder head (3) of the internal combustion engine, characterized in that a mounting plate (2.8) is formed on one side of each actuator (2), that one for each actuator (2) on the cylinder head (3) Mounting surface (3.4) is designed so that the mounting plates (2.8) of the actuators (2) formed on one side are attached to the cylinder head (3) alternately falling to the left and to the right so that exactly one lubricant hole () in each mounting surface (3.4) 3.7) and that the actuators (2) have two bores (2.7) for lubricants, so ...

Variable valve drive

The disclosure relates to a variable valve drive, in particular with a sliding cam system, for an internal combustion engine. The variable valve drive has a cam carrier which has a first and second cam and a first, second, and third engagement track. A first actuator is designed to engage into the first engagement track in order to displace the cam carrier in a first axial direction. A second actuator is designed to engage into the second engagement track in order to displace the cam carrier in a second axial direction which is opposite to the first axial direction, and to engage into the third engagement track in order to displace the cam carrier in the first axial direction. The variable valve drive can have the advantage that, even in the event of a failure of the first actuator, a displacement of the cam carrier that is normally effected by means of the first actuator is possible by means of the second actuator.

Variable valve drive

The present disclosure relates to a variable valve drive, in particular with a sliding cam system, for an internal combustion engine. The variable valve drive has a shaft and a cam carrier which is arranged rotationally conjointly and axially displaceably on the shaft and which has a first cam and a second cam. The variable valve drive has an actuator device for axially displacing the cam carrier, and has a carrying device which at least partially engages around a lever axle of a force transmission device and carries the actuator device. The variable valve drive can offer the advantage that an arrangement of the actuator device which is expedient in terms of structural space is made possible in the region of the lever axle. At the same time, support of the actuator device by means of the carrying device on the lever axle can stiffen the flexible lever axle by means of the engaging-around configuration.

Valve train for an internal combustion engine and internal combustion engine

Die Erfindung betrifft einen Ventiltrieb für eine Verbrennungskraftmaschine, umfassend eine Nockenwelle (3) und einen mit der Nockenwelle (3) drehfest und axial verschiebbar gelagerten Nockenträger (4), wobei die Nockenwelle (3) in einem Gehäuse (16) des Ventiltriebs (1) radial gelagert ist, und wobei eine Rasteinrichtung (9) zur Positionssicherung des Nockenträgers (4) ausgebildet ist, und wobei ein Aktuator (34) aufweisend einen in radialer Richtung der Nockenwelle (3) bewegbar ausgebildeten ersten Stift (23) und einen in radialer Richtung der Nockenwelle (3) bewegbar ausgebildeten zweiten Stift (24), vorgesehen ist, mittels dessen Hilfe eine axiale Verschiebung des Nockenträgers (4) herbeiführbar ist, und wobei das Gehäuse (16) zur Begrenzung einer axialen Bewegung des Nockenträgers (4) ausgebildet ist, und wobei zur Positionierung des Nockenträgers (4) eine Aufnahmenut (25) im Nockenträger (4) ausgebildet ist, in welche die Stifte (23, 24) eingreifbar anordenbar sind, und wobei für einen Auswurf der Stifte (23, 24) aus der Aufnahmenut (25) ein Stellelement (26) vorgesehen ist. Erfindungsgemäß ist zur Verhinderung eines Verklemmens der Stifte (23, 24) das Stellelement (26) zumindest teilweise elastisch ausgebildet. Des Weiteren betrifft die Erfindung eine Verbrennungskraftmaschine. The invention relates to a valve drive for an internal combustion engine, comprising a camshaft (3) and a cam carrier (4) which is non-rotatably and axially displaceably mounted with the camshaft (3), the camshaft (3) being mounted in a housing (16) of the valve drive (1) is mounted radially, and wherein a latching device (9) is designed to secure the position of the cam carrier (4), and wherein an actuator (34) has a first pin (23) designed to be movable in the radial direction of the camshaft (3) and a first pin (23) designed to be movable in the radial direction the camshaft (3) is provided with a movable second pin (24), by means of which an axial displacement of the cam carrier (4 ...

Valve gear of an internal combustion engine with at least one camshaft

Die Erfindung betrifft einen axial verschiebbare Nockenstücke aufweisenden Ventiltrieb einer Brennkraftmaschine, wobei ein Nockenstück mindestens zwei Nocken aufweist, die jeweils mindestens zwei Nockenlaufbahnen aufweisen. Dabei unterscheiden sich der erste Nocken und der mindestens zweite Nocken eines Nockenstückes in mindestens einer Nockenlaufbahn. The invention relates to an axially displaceable cam pieces having valve train of an internal combustion engine, wherein a cam piece has at least two cams, each having at least two cam tracks. In this case, the first cam and the at least second cam of a cam piece differ in at least one cam track.

Camshaft, in particular for motor vehicle engines

Die Erfindung betrifft eine Nockenwelle, insbesondere für Kraftfahrzeugmotoren, mit einer ersten Welle und einer zweiten Welle, die eine hohle Außenwelle (1) und eine koaxial in der Außenwelle (1) anordnete und gegenüber der Außenwelle (1) verdrehbare Innenwelle (2) bilden, mit ersten an der Außenwelle (1) drehfest angeordneten Nocken (3a) und mit zweiten Nocken (3b), die drehbar an der Außenwelle (1) angeordnet und an der Innenwelle (2) befestigt sind. Erfindungsgemäß sind die erste Welle und die zweite Welle in axialer Richtung (x) durch eine Formschlussausformung (5) gegeneinander abgestützt, wobei die erste Welle in axialer Richtung (x) gesehen auf der einen Seite der Formschlussausformung (5) eine erste Kontaktfläche (6a) und auf der anderen Seite der Formschlussausformung (5) eine zweite Kontaktfläche (6b) zur drehbeweglichen Abstützung der zweiten Welle über die Formschlussausformung (5) aufweist. The invention relates to a camshaft, in particular for motor vehicle engines, with a first shaft and a second shaft which form a hollow outer shaft (1) and a coaxial in the outer shaft (1) and with respect to the outer shaft (1) rotatable inner shaft (2), with first on the outer shaft (1) rotatably arranged cam (3a) and with second cam (3b), which are rotatably mounted on the outer shaft (1) and fixed to the inner shaft (2). According to the invention, the first shaft and the second shaft are supported against one another in the axial direction (x) by a form-locking formation (5), the first shaft, seen in the axial direction (x), having a first contact surface (6a) on one side of the form-locking formation (5). and on the other side of the form-locking formation (5) has a second contact surface (6b) for rotatably supporting the second shaft on the Formschlussausformung (5).

Valve train for multi-cylinder combustion engine of motorcycle, has position unit whose actuator pins radially extend to cam shaft, where outer jacket surface of portion of actuator pins engage at guide surfaces

The train has a cam unit (9) comprising two cams (10, 11) and displaceable in an axial direction by an adjustment device (18) i.e. worm drive, that comprises a rotary adjustable link (17). Actuator pins (20, 21) of a position unit (19) are displaced in a radial direction during an adjusting process. The link comprises an outer ring (22), where helix-like extending guide surfaces (23, 24) are formed at face surfaces of the ring and directed in opposite directions. The pins radially extend to a cam shaft (1), where an outer jacket surface of a portion of the pins engages at the guide surfaces.

Valve train for an internal combustion engine and internal combustion engine

Die Erfindung betrifft einen Ventiltrieb für eine Verbrennungskraftmaschine, umfassend eine Nockenwelle (3) und einen mit der Nockenwelle (3) drehfest und axial verschiebbar gelagerten Nockenträger (4), wobei die Nockenwelle (3) in einem Gehäuse (16) des Ventiltriebs (1) radial gelagert ist, und wobei eine Rasteinrichtung (9) zur Positionssicherung des Nockenträgers (4) ausgebildet ist, und wobei ein Aktuator (34) aufweisend einen in radialer Richtung der Nockenwelle (3) bewegbar ausgebildeten ersten Stift (23) und einen in radialer Richtung der Nockenwelle (3) bewegbar ausgebildeten zweiten Stift (24), vorgesehen ist, mittels dessen Hilfe eine axiale Verschiebung des Nockenträgers (4) herbeiführbar ist, und wobei das Gehäuse (16) zur Begrenzung einer axialen Bewegung des Nockenträgers (4) ausgebildet ist, und wobei zur Positionierung des Nockenträgers (4) eine Aufnahmenut (25) im Nockenträger (4) ausgebildet ist, in welche die Stifte (23, 24) eingreifbar anordenbar sind, und wobei für einen Auswurf der Stifte (23, 24) aus der Aufnahmenut (25) ein Stellelement (26) vorgesehen ist. Erfindungsgemäß ist zur Verhinderung eines Verklemmens der Stifte (23, 24) das Stellelement (26) zumindest teilweise elastisch ausgebildet. Des Weiteren betrifft die Erfindung eine Verbrennungskraftmaschine. The invention relates to a valve drive for an internal combustion engine, comprising a camshaft (3) and a cam carrier (4) which is non-rotatably and axially displaceably mounted with the camshaft (3), the camshaft (3) being mounted in a housing (16) of the valve drive (1) is mounted radially, and wherein a latching device (9) is designed to secure the position of the cam carrier (4), and wherein an actuator (34) has a first pin (23) designed to be movable in the radial direction of the camshaft (3) and a first pin (23) designed to be movable in the radial direction the camshaft (3) is provided with a movable second pin (24), by means of which an axial displacement of the cam carrier (4 ...

Valve control of an internal combustion engine

The valves of the engine are operated by one of a number of cams (4a to 4c) which are integral with a sleeve (5) and which are located next to one another. The sleeve is connected to the camshaft (6) by e.g. splines so that it rotates with the shaft but can be moved axially. The sleeve is moved axially by rods (15,18), which can be fed-in radially towards the camshaft, and which engage with axial cam faces (9,10) on the endfaces of the sleeve. The sleeve is positioned on the camshaft by a spring-loaded ball (23) which engages with grooves in the sleeve bore.

Valve driving device for internal combustion engine

(57)【要約】 【課題】 カム軸が、摺動可能なカムとともに、総じて より安価でより簡単に製造できて、製造及び組み付け時 に、摺動させようとするカムの各回転位置に対する行程 成形部の対応配属が簡単に行えるような内燃機関の弁駆 動装置を提供する。 【解決手段】 行程成形部９，１０がカム５に形成され ていて、操作部材１１，１２，１３，１４が、カム軸に 対して半径方向に配置された操作ピン１５，１６，１ ７，１８を有しており、これらの操作ピンが摺動して、 行程成形部９，１０と係合させられる。

Valve drive device of combustion device

본 발명에 따른 연소 장치의 밸브 구동 장치는 서로 다른 다수의 스트로크 커브를 구비하여 가스 교환 밸브의 작동을 가능하게 한다. 캠축 상에 다수의 캠트랙을 갖는 캠은 축 방향으로 이동할 수 있게 놓인다. 상기 캠에는 스트로크 윤곽부가 마련되며, 구동 부재가 스트로크 구조와 연관되어 캠을 축 방향 이동시키며 한 캠축에서 다른 캠축으로의 변환이 일어난다.

Adjustable camshaft

The present invention relates to an adjustable camshaft (1) for an internal combustion engine having a support shaft (11) which extends in the direction of a rotational axis (10), wherein at least one cam pack (12) having at least one cam element (13) is received on the support shaft (11) such that it can be displaced in the direction of a rotational axis (10), wherein the cam pack (12) can be latched in at least two axial latching positions on the support shaft (11), and wherein at least one latching element (15) which is prestressed by way of a spring element (14) and at least one latching element seat (16) are provided in order to form the latching positions, with the result that the latching element (15) can latch in the latching element seat (16) in the latching positions. According to the invention, the spring element (14) and the latching element (15) which is prestressed by way of it are received in the cam pack (12), and it is provided that the at least one latching element seat (16) is arranged on the support shaft (11).

Adjustable camshaft

An adjustable camshaft for an internal combustion engine may have a support shaft that extends along a rotational axis; a cam pack having a cam element that is received on the support shaft such that the cam pack can be displaced along the rotational axis, wherein the cam pack can be latched on the support shaft in at least two axial latching positions; a latching element that is prestressed by way of a spring element; and a latching element receptacle disposed on the support shaft. The latching element can latch into the latching element receptacle in the latching positions. The spring element and the latching element may be received in the cam pack.

Adjustable camshaft

Die vorliegende Erfindung betrifft eine verstellbare Nockenwelle (1) für eine Brennkraftmaschine mit einer sich in Richtung einer Rotationsachse (10) erstreckenden Trägerwelle (11), wobei auf der Trägerwelle (11) wenigstens ein Nockenpaket (12) aufweisend wenigstens ein Nockenelement (13) in Richtung einer Rotationsachse (10) verschieblich aufgenommen ist, wobei das Nockenpaket (12) auf der Trägerwelle (11) in wenigstens zwei axialen Rastpositionen einrastbar ist, und wobei zur Bildung der Rastpositionen wenigstens ein mit einem Federelement (14) vorgespanntes Rastelement (15) und wenigstens eine Rastelementaufnahme (16) vorgesehen sind, sodass das Rastelement (15) in den Rastpositionen in der Rastelementaufnahme (16) einrasten kann. Erfindungsgemäß sind das Federelement (14) und das mit diesem vorgespannte Rastelement (15) im Nockenpaket (12) aufgenommen und es ist vorgesehen, dass die wenigstens eine Rastelementaufnahme (16) an der Trägerwelle (11) angeordnet ist. The present invention relates to an adjustable camshaft (1) for an internal combustion engine having a support shaft (11) extending in the direction of a rotation axis (10), at least one cam element (12) having on the support shaft (11) at least one cam element (13) The cam package (12) on the carrier shaft (11) can be latched in at least two axial detent positions, and wherein at least one with a spring element (14) biased detent element (15) and at least one locking element receptacle (16) are provided so that the latching element (15) can engage in the latching positions in the latching element receptacle (16). According to the invention, the spring element (14) and the prestressed with this detent element (15) in the cam package (12) and it is provided that the at least one detent element receptacle (16) on the support shaft (11) is arranged.

Variable angle camshaft

A new variable angle camshaft for providing improved fuel economy and better performance for motorists. The inventive device includes a cylindrical housing having a partially hollow interior. The thick rear wall has a channel running therethrough. A forward end of the housing has a threaded collar opening into the partially hollow interior. The threaded collar is coupled with a line from an oil pump. A piston is slidably disposed within the partially hollow interior of the housing. A spring is disposed between the piston and an interior surface of the thick rear wall of the housing. The piston has a shaft extending outwardly therefrom into the channel of the housing. A cam shaft is provided including an outer housing and a movable interior segment. The cam shaft has an outer end extending inwardly of the channel of the cylindrical housing in a proximate relationship to the shaft of the piston. An inner end of the movable interior segment has a spring disposed thereon. The outer housing has a gear disposed thereon for engaging a crankshaft gear. The cam shaft has a cam shaft lobe disposed thereon. The cam shaft lobe includes an outer fixed lobe and an inner movable lobe. The outer fixed lobe is coupled with the outer housing. The inner movable lobe is coupled with the movable interior segment.

Engine assembly including camshaft actuator

An engine assembly may include an engine structure, a camshaft supported for rotation on the engine structure, a drive member and a camshaft actuation assembly. The camshaft may include a first shaft, a second shaft located within the first shaft and rotatable relative to the first shaft, a first cam lobe located on the first shaft and fixed for rotation with the first shaft and a second cam lobe supported for rotation on the first shaft and fixed for rotation with the second shaft. The drive member may be fixed to a first axial end of the camshaft and rotationally driven to drive rotation of the camshaft. The camshaft actuation assembly may include an actuator coupled to a second axial end of the camshaft and rotationally fixed to the engine structure and relative to the camshaft.

Variable valve operating device for internal combustion engine

System for controlling valve shift timing of an engine

흡기밸브 또는 배기밸브는 캠축에 형성된 회전캠의 회전에 의하여 요동캠을 통하여 리프트된다. 요동캠이 회전캠과 접하는 면은 상기 캠축이 뻗는 축방향으로 테이퍼지고, 밸브시프트타이밍은 캠축, 즉 회전캠은 상기 캠축이 뻗는 축방향으로 이동시킴으로써 변경된다. 엔진의 출력측과 함께 회전되는 헬리컬기어등의 동력전달부재는 헬리컬스플라인을 통하여 캠축과 맞물리게 된다. 동력전달부재는 상기 캠축이 뻗는 축방향으로 이동할 수 없도록 배치된다. 엔진의 출력축에 대한 회전캠의 회전위상은 상기 캠축이 뻗는 축방향으로 동력전달부재에 대한 캠축의 변위에 의해 변경된다. The intake valve or exhaust valve is lifted through the swing cam by the rotation of the rotary cam formed on the cam shaft. The surface where the oscillating cam is in contact with the rotary cam is tapered in the axial direction in which the cam shaft extends, and the valve shift timing is changed by moving the cam shaft, i.e., the rotary cam in the axial direction in which the cam shaft extends. Power transmission members, such as helical gears, which rotate together with the output side of the engine, are engaged with the camshaft through the helical spline. The power transmission member is disposed so as not to move in the axial direction in which the cam shaft extends. The rotational phase of the rotating cam about the output shaft of the engine is changed by the displacement of the cam shaft with respect to the power transmission member in the axial direction in which the cam shaft extends.

Camshaft for a valve drive of an internal combustion engine with variable valve opening duration

本发明涉及具有可变阀开启持续时间的用于内燃机的阀动装置的凸轮轴(1)，所述凸轮轴(1)具有外轴(2)和延伸穿过所述外轴(2)的内轴(3)。所述内轴(3)以相对于所述外轴(2)能够转动的方式被保持。凸轮(6′)被设计为多个部分并且包括第一子凸轮(4)和至少一个第二子凸轮(5)。所述第一子凸轮(4)和所述至少一个第二子凸轮(5)中的一者可转动地固定到所述外轴(2)，并且第一子凸轮(4)和所述至少一个第二子凸轮(5)中的另一子凸轮(5，4)可转动地固定到所述内轴(3)。轴承(9)的轴承内圈(7)被保持在所述外轴(2)上，并且，一个所述第二子凸轮(5)包括形成所述轴承内圈(7)的至少一部分的轴向突起。

Valve gear for multi-cylinder internal combustion engine

각각의 실린더 (2) 에 제공되며 선형 운동을 통해 각각의 실린더의 밸브 (3) 를 구동하는 캠 기구 (13) 를 통해 밸브구동원에서 출력되는 회전 운동을 선형 운동으로 전환하는 밸브 구동 장치 (10) 로서, 밸브 구동 장치에는 밸브의 밸브개방기간이 오버랩되지 않는 다수의 실린더를 포함하는 일 군의 실린더의 밸브구동원으로서 공용되는 전기 모터 (11, 12); 및 전기 모터 (11, 12) 의 회전 운동을 상기 실린더 군의 각각의 캠 기구 (13) 의 캠 (16) 에 전달하는 운동전달기구 (14, 15) 가 설치되어있다. 밸브 구동 장치 The valve drive device 10 which is provided to each cylinder 2 and converts the rotational motion output from the valve drive source into the linear motion through the cam mechanism 13 which drives the valve 3 of each cylinder through the linear motion. As the valve drive device, there are provided electric motors (11, 12) shared as a valve driving source of a group of cylinders including a plurality of cylinders in which the valve opening period of the valve does not overlap; And movement transmission mechanisms 14 and 15 for transmitting the rotational movements of the electric motors 11 and 12 to the cams 16 of the respective cam mechanisms 13 of the cylinder group. Valve drive

Ice valve timing control device

FIELD: engines and pumps. SUBSTANCE: proposed device serves to control timing of two intake valves or two discharge valves of every ICE cylinder. Proposed device comprises shaft element 17 actuated by ICE crankshaft, first and second cams 20, 22a and can phase drive. First cam 20 is located at outer surface of shaft element 17 and cam working surface to actuate one of two intake or discharge valves. Second valve 22a is located at outer surface of element 17 to displace in circle and has working surface to actuate another intake or discharge valve. Cam phase drive changes the phase of second cam 22a with respect to that of the first cam 20. Second cam working surface features width larger than that of the first cam. EFFECT: decreased wear, simplified design. 3 cl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 493 376 (13) C1 (51) МПК F01L F01L 1/04 1/34 (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2012107178/06, 22.11.2010 (24) Дата начала отсчета срока действия патента: 22.11.2010 (72) Автор(ы): ЙОСИКА Дайсуке (JP), МУРАТА Синити (JP) (45) Опубликовано: 20.09.2013 Бюл. № 26 2 4 9 3 3 7 6 (56) Список документов, цитированных в отчете о поиске: JP 2009144522 A, 02.07.2009. JP 2000213315 A, 02.08.2000. WO 2009005999 A1, 08.01.2009. GB 2431977 A, 09.05.2007. JP 2005140010 A, 02.06.2005. RU 2353783 C2, 27.04.2009. SU 1195916 A, 30.11.1985. 2 4 9 3 3 7 6 R U (86) Заявка PCT: JP 2010/070799 (22.11.2010) C 1 C 1 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 27.02.2012 (87) Публикация заявки РСТ: WO 2011/065326 (03.06.2011) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры" (54) УСТРОЙСТВО РЕГУЛИРУЕМЫХ КЛАПАНОВ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ (57) Реферат: Изобретение может быть использовано в устройствах регулируемых клапанов двигателей внутреннего сгорания. Устройство регулируемых клапанов для двигателя внутреннего ...

CAMSHAFT ARRANGEMENT WITH AT LEAST ONE DISABLABLE CAM

Method of producing a camshaft arrangement with shaft elements lying one inside the other

Method of producing a camshaft arrangement for valve-controlled internal combustion engines with two shaft elements lying one inside the other. The shaft elements are mounted one inside the other and can be rotated relative to one another by a limited angle, in which arrangement first cams, designated as inner cams, in particular for the inlet valves are connected to the inner shaft element and second cams, designated as outer cams, in particular for the exhaust valves are connected to the outer shaft element, and the outer shaft has wall openings through which fastening elements of the inner cams pass radially, and at least one of the shaft elements is composed of individual longitudinal sections. In this method, the individual longitudinal sections are made in one piece with at least one allocated cam or are connected to this cam, the cams are finish-machined, hardened and ground before the individual longitudinal sections are put together, and finally the individual longitudinal sections are connected to the completely finished cams. <IMAGE>

Camshaft with angularly adjustable control cams, especially for inlet and exhaust valves of an internal combustion engine

For a camshaft with angularly adjustable control cams, especially for inlet and exhaust valves of an internal combustion engine it is proposed to provide, between two sections which are axially fixed by means of a step bearing, section, centred in the said sections and capable of rotating on both sides, with a likewise rotationally fixed control cam and to control the angular adjustment of all sections by way of rotary stops, each arranged inside and locatably provided on an actuating element.

Cam shaft with turnable cams

The bar (7) is moved at least partially in longitudinal direction (12) of the tube (6), to turn the cams. Cams (1) or bar have crank paths (11), inclined relative to the recesses (10). This is to accommodate control elements (8), which are located on bar or cams.The control elements are formed as pegs, and crank paths and recesses are formed as guide grooves. The contact faces of the control elements are flat. The cams are axially guided on the tube by distance sleeves (2,4).

Constructed camshaft for internal combustion engine

The cams on the inner shaft are connected to it by a driver member. The inlet cams are adjustable in relation to the outlet cams by a shape adjustment device. The cams (5,6) connected with the inner shaft (3) via the driver member (7) have an outward cylindrical area in their axial direction. In the cylindrical area is a recess (9) in which is arranged the driver member. The driver member is connected with the inner shaft by a press seat and with the cam via a push seat. In the area of the recess sealing shoulders (13) formed in one piece with the inner shaft are positioned between the inner and outer shafts. The driver member is a cylindrical pin and the recess is a cylindrical bore.