| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123900180 | Axially shiftable camshaft | 55 |
| 20090064952 | Valve drive for an internal combustion engine - The invention relates to a valve drive for internal combustion engines, comprising at least one cam assembly which can be axially displaced on a camshaft. The assembly consists of at least two cams having different profiles and actuating optionally at least one gas exchange valve for adjusting different valve lifts and/or valve timing. The aim of the invention is to create a space-saving and simple valve drive for an internal combustion engine of the aforementioned type, which allows valve lift and/or valve timing to be adjusted without an additional actuation stage. For this purpose, one cam is connected to the camshaft so as to rotate with the camshaft and the other cam is mounted so as to be rotated on the camshaft. The cam that is rotationally mounted on the camshaft can be positively connected to and released from the cam that is connected so as to rotate with the camshaft via a controlled pilot and main locking plunger. The rotationally fixed cam has a larger profile height than the rotationally mounted cam. The larger profile height is designed for a relatively large lift of the gas exchange valve, while the lower cam profile height is designed for smaller lift heights. By displacing the cam assembly when the cams are coupled, the cam with the larger or the smaller profile height can be engaged with the gas exchange valve. A zero lift of the gas exchange valve can be adjusted, when the cam with the smaller profile height engages, by decoupling the rotational cam from the cam that is arranged on the camshaft so as to rotate therewith. | 03-12-2009 |
| 20090071427 | Valve Drive for an Internal Combustion Engine - A drive valve for an internal combustion engine comprising a variable hub profile for a valve having a lever supported on a variable support point by means of a switchable support element which provides possibilities for influencing the hub profile and alternatively and cumulatively, the cam is axially displaced such that various cam paths are active on the lever. | 03-19-2009 |
| 20100012062 | ACTUATOR DEVICE AND VARIABLE VALVE APPARATUS OF INTERNAL COMBUSTION ENGINE - There is provided an actuator device for a variable valve apparatus. The variable valve apparatus has a control shaft to vary operation characteristics of an engine valve by an axial movement thereof. The actuator device has a rotatable screw shaft, a movable member axially movable with rotation of the screw shaft and a transmission mechanism unit that converts an axial movement of the movable member to the axial movement of the control shaft. An amount of the axial movement of the movable member is larger than an amount of the axial movement of the control shaft. | 01-21-2010 |
| 20100251982 | VALVE DRIVE OF AN INTERNAL COMBUSTION ENGINE - A valve drive ( | 10-07-2010 |
| 20100288218 | Valve drive device - In a valve drive arrangement for an internal combustion engine including a camshaft carrying axially movable cam elements provided with cams for operating gas exchange valves of the internal combustion engine and an actuation device having at least one shift element which is provided to shift cam element by means of a shifting gate between opposite axial positions, the valve drive arrangement has a change-over device for changing the axial shift direction of the shift element from one to the opposite axial position. | 11-18-2010 |
| 20110079191 | Valve drive train device - In a valve train device, particularly of an internal combustion engine, which device has an actuating device for displacing at least one axially displaceable cam element and a gear shifting gate for axially displacing the cam element and furthermore at least one switch unit with a switch element and an actuator for operating the switch element so as to engage the gear shifting gate at least in one switching position and to move the switch element into a desired switching position, the gear shifting gate has at least one intermediate segment for terminating a switching action. | 04-07-2011 |
| 20110185995 | Splined-Shaft Connection and Valve Timing Mechanism With a Splined-Shaft Connection Between a Camshaft and Displaceable Cam Carriers - The invention relates to a splined-shaft connection between a hollow shaft or hub provided with an internal toothing system and a shaft provided with an external toothing system. In order to enable radial play compensation in the splined-shaft connection and radial support and centering of the hollow shaft or hub on the shaft, it is proposed that the two toothing systems over part of their length be opposite one another in the region of a tip-circle diameter and/or a root-circle diameter of the external toothing system with a clearance fit and in the region of the tooth flanks of the internal and external toothing system be opposite one another at a greater distance, and that the two toothing systems be opposite one another over another part of their length in the region of the adjacent tooth flanks of the internal and external toothing system with a clearance fit, while they be opposite one another in the region of the tip-circle diameter and the root-circle diameter of the external toothing system with radial play. Preferably, the splined-shaft connection is located between a camshaft and cam carriers of a valve timing mechanism, which carriers can be displaced on the camshaft, for gas exchange valves of an internal combustion engine. | 08-04-2011 |
| 20110203541 | Valve drive train arrangement - In a valve drive train device of an internal combustion engine, comprising a phase adjustment device for the adjustment of a phase position between a primary cam and a secondary cam which belong to a same category and which are arranged coaxial with one another, at least one is assigned to a pair of cams for executing a valve lift changeover so as to allow the valve drive train device to be instantly adjusted to a momentary operating situation. | 08-25-2011 |
| 20110226205 | Valve Train with Camshaft with an Axially Displaceable Cam Unit - A valve train for an internal combustion engine includes a camshaft with a cam unit for actuating a gas exchange valve. The cam unit has at least two cam paths arranged axially one behind the other and is arranged on the camshaft in a rotation-resistant and axially displaceable manner, and has an actuating profile interacting with a displaceable actuating element between a home position and an actuating position radially to the axis of the camshaft for axially displacing the cam unit on the camshaft. The actuating profile is formed by the lateral front face of the cam unit, and the actuating element has at least one displaceable actuating pin that interacts with a lateral front face of the cam unit such that an axial displacement of the cam unit takes place and in each axial position a different cam path is activated to actuate the gas exchange valve. | 09-22-2011 |
| 20110247577 | VALVE DRIVE OF AN INTERNAL COMBUSTION ENGINE - A valve drive of an internal combustion engine is provided, having a camshaft ( | 10-13-2011 |
| 20110303172 | VALVE DRIVE OF AN INTERNAL COMBUSTION ENGINE HAVING AN ADUSTMENT DEVICE - A valve drive for controlling gas exchange valves of an internal combustion engine. The valve drive has at least one valve camshaft that is supported within a cylinder head of the engine and that can be moved in rotation by a drive disk and an adjustment device, which has an adjustment motor and a gear train. The adjustment device provides for an axial movement and/or rotation of the valve camshaft relative to the drive disk in a specific manner upon actuation of the adjustment motor and by the intermediately connected gear train in order to vary in a specific manner an actuation of the gas exchange valves that occurs by cams of the valve camshaft. Also, the adjustment motor is placed predominantly or completely within a common chamber with the drive disk. | 12-15-2011 |
| 20110315105 | Variable Valve Lift Apparatus - A variable valve lift apparatus may include a control shaft slidably disposed within a camshaft, a cam which is slidably disposed to the camshaft and a high lift cam lobe and a low lift cam lobe is formed thereto, a valve opening/closing unit contacting the cam and a control portion which moves the cam for the high lift cam lobe or the low lift cam lobe selectively to contact the valve opening/closing unit according to operation of the control shaft. | 12-29-2011 |
| 20120006292 | VALVE DRIVE OF AN INTERNAL COMBUSTION ENGINE - A valve drive of an internal combustion engine with variable-lift gas exchange valve actuation. The valve drive has a camshaft with a support shaft and a cam piece arranged on the support shaft for conjoint rotation therewith and to be movable between axial positions. The cam piece has two cam groups of directly adjacent cams with different elevations and, on the end side, the cam piece has an axial slotted guide into which can be coupled an actuating element. The cam piece has a bearing journal which runs between the cam groups and rotatably mounted in a camshaft bearing point arranged in a positionally fixed manner in the engine. Here, the diameter of the bearing journal is larger than the envelope circle diameter of a cam closest to the bearing journal with the cam and camshaft bearing point overlapping axially in an axial position of the cam piece. | 01-12-2012 |
| 20120031361 | INTERNAL COMBUSTION ENGINE - Disclosed herein is an internal combustion engine having a plurality of cylinders, a crankcase, a cylinder head and a cylinder-head cover, the cylinder head being formed from a cylinder-head lower part and a camshaft housing which is positioned between the cylinder-head cover and the cylinder-head lower part, and at least one camshaft and one sliding cam which can be displaced axially on the camshaft and has a slotted-guide section being provided for actuating gas exchange valves of the internal combustion engine, an actuator with an actuable pin being provided for bringing about an axial displacement of the sliding cam. The camshaft and the sliding cam are positioned in the camshaft housing. The camshaft, which is mounted rotatably for valve actuation, is arranged with the axially displaceable sliding cam in the camshaft housing in such a way that they can be attached to the cylinder-head lower part as one preassembled unit. | 02-09-2012 |
| 20120031362 | ELECTROMAGNETIC CAMSHAFT ADJUSTMENT DEVICE - An electromagnetic camshaft adjusting device has an armature unit, which can be moved relative to a yoke and core unit by energizing a stationary coil unit and which is designed to carry out an axial actuating movement and to exert a correspondingly axially directed actuating force on a rotating internal combustion engine camshaft by a slider unit interacting with the armature unit. The yoke and core unit is mounted such that it can rotate relative to the coil unit and provides a receptacle for the armature unit that is guided such that it can move axially in the yoke and core unit and has the slider unit firmly seated thereon. | 02-09-2012 |
| 20120037106 | VALVE TRAIN FOR INTERNAL COMBUSTION ENGINES FOR ACTUATING GAS EXCHANGE VALVES - A valve train for an internal combustion engine for actuating gas exchange valves includes a camshaft in the form of a camshaft tube driven by a crankshaft of the internal combustion engine. A selector shaft is disposed in the camshaft tube. A surface of the selector shaft includes a shifting contour having an axial gradient. At least one cam carrier is disposed on the crankshaft and axially displaceable but rotationally fixed with respect to the camshaft. Each cam carrier includes an identical base-circle portion and a plurality of cam profiles. A rotationally fixed but axially displaceable shifting sleeve is disposed between the camshaft tube and the rotatable selector shaft of each cam carrier. Each shifting sleeve includes a hole. A shilling ball is disposed in the hole of each shifting sleeve. The shifting ball ois coupled with the shifting contour of the selector shaft so as to be guided by the selector shaft so as to axially displace the shifting sleeve by rotation of the selector shaft. The shifting sleeve is operatively connected to the cam carrier via at least a driver for axial displacement of the cam carrier. | 02-16-2012 |
| 20120138000 | VALVE DRIVE ARRANGEMENT - In a valve drive arrangement of an internal combustion engine, having a first camshaft unit which comprises an outer shaft and primary cams connected to the outer shaft, a second camshaft unit which comprises an inner shaft disposed in the outer shaft, secondary cams connected to the inner shaft and disposed on the outer shaft and an adjusting unit for adjusting the two camshaft units relative to each other an adjusting unit provides for an at least two stage sequential valve stroke wherein, in a switching process, two shaft elements of a camshaft unit are displaced sequentially one after the other. | 06-07-2012 |
| 20120138001 | VARIABLE VALVE TRAIN FOR INTERNAL COMBUSTION ENGINES FOR ACTUATING GAS EXCHANGE VALVES - A variable valve train for actuating a plurality of gas exchange valves of an internal combustion engine includes a plurality of individual cam sleeves axially displaceable relative to one another and disposed so as to form the camshaft. Each of the plurality of individual cam sleeves include a plurality of different cam profiles. A switching shaft is disposed inside the plurality of cam sleeves and is configured to rotate together with the plurality of cam sleeves. A switching ball operatively connects one of the plurality of cam sleeves to a switching contour disposed on the switching shaft. A displacement piece is disposed so as to be rotationally engaged but axially displaceable on one of the plurality of cam sleeves and connected to the switching shaft. An actuator is operatively connectable to the displacement piece by the switching ball so as to displace the one of the plurality of cam sleeves. | 06-07-2012 |
| 20120138002 | VARIABLE VALVE OPERATING APPARATUS FOR INTERNAL COMBUSTION ENGINE - Provided is a variable valve operating apparatus for an internal combustion engine, which can switch, based on an actuation of a single actuator, operating characteristics of valves for a plurality of cylinders collectively and smoothly using a rigid member, while suppressing an increase in wear of a guide rail and reducing the number of delay mechanisms. | 06-07-2012 |
| 20120227697 | VALVE DRIVE FOR AN INTERNAL COMBUSTION ENGINE - A valve drive for an internal combustion engine, wherein in order to activate gas exchange valves at least one camshaft having at least one sliding cam which can be displaced axially on the camshaft is provided, wherein the respective sliding cam has a sliding block section with a plurality of grooves which are formed on an outer lateral face and are positioned one behind the other on the circumference, wherein in order to bring about displacement of the respective sliding cam an actuator is provided with a first pin for displacement in the two directions about a first axial segment and a second pin for displacement in the two directions about a second axial segment. The sliding block section is manufactured in certain sections from a material with a relatively high electrical conductivity and in certain sections from a material with a relatively low electrical conductivity. | 09-13-2012 |
| 20120312263 | Variable Geometry Cam Shafts For Multiple-Cylinder Internal Combustion Engines - A method of conserving fuel in the operation of multi-cylinder internal combustion engines. The present method described here allows a portion of the cylinders of an internal combustion engine to be de-activated when less power is required, thus allowing the engine to provide full power when required, or less power with substantial fuel savings. The present method does so by altering the normal operation of intake and exhaust valves by leaving the intake valve at least partially closed, and the exhaust valve at least partially open. The present method overcomes numerous problems in the prior art, such as excess load placed on the engine caused by trapped gases, damaging thermal gradients across the engine block, and difficulty of retrofitting existing engines. | 12-13-2012 |
| 20130000581 | ACTUATOR UNIT HAVING TWO ACTUATOR PINS - An internal combustion piston engine having gas exchange valves actuated by cams of a camshaft. The cams are sliding cams having two cams per sliding cam unit situated on a basic shaft in rotationally fixed fashion but axially displaceable. At least one actuator unit has two actuator pins for displacing the sliding cam units into different axial positions using displacement grooves on the circumference of the sliding cam units, the grooves being helical and situated mirror-symmetrically, and having an ejection ramp for the actuator pins. The actuator pins are spring-loaded toward the sliding cam unit and, in retracted positions, can be fixed by arresting devices, which have control needles that correspond to clamping bodies of locking devices. These needles are actuatable by an electromagnet unit, with the control needles being connected with a needle bridge. A pin engages the needle bridge, and the pin is controlled by the electromagnet unit. | 01-03-2013 |
| 20130025554 | VALVE DRIVE FOR INTERNAL COMBUSTION ENGINES FOR ACTUATING GAS EXCHANGE VALVES - A valve drive device for switching the stroke of gas exchange valves of an internal combustion engine includes a camshaft configured, at least in part, as a hollow shaft. A cam unit includes at least two different cams disposed on the camshaft so as to be rotationally engaged and axially displaceable with respect thereto. An adjustment sleeve is disposed so as to be rotationally engaged on an adjustment shaft and rotatable and axially displaceable inside the camshaft. The adjustment sleeve includes thereon a closed adjustment contour extending about a circumference of the adjustment sleeve and is operatively connected to the cam unit through an adjustment clearance in the camshaft via a first coupling element configured to permanently engage in the adjustment contour. A further coupling element is configured to permanently engage in the adjustment contour and connect to the camshaft so as to be fixed in position. | 01-31-2013 |
| 20130047944 | INTERNAL COMBUSTION ENGINE AND VALVE DRIVE FOR AN INTERNAL COMBUSTION ENGINE - An internal combustion engine having a cylinder head and a cylinder head cover, wherein in order to activate charge cycle valves, at least one rotatably mounted cam shaft is provided with at least one sliding cam which can be slid axially on the respective cam shaft, wherein the respective sliding cam has at least one slotted link section with at least one groove, wherein in order to bring about axial sliding of the respective sliding cam, an actuator is provided, and wherein after axial sliding on the respective cam shaft, the respective sliding cam can be latched in its axial relative position relative to a charge cycle valve to be activated by a locking device which has a first latching element with a plurality of latching depressions and at least one second latching element which interacts with the first latching element. | 02-28-2013 |
| 20130104824 | Adjustable Camshaft | 05-02-2013 |
| 20130306014 | INTERNAL COMBUSTION ENGINE VALVE ACTUATION CONTROL ARRANGEMENT - In an internal combustion engine a valve actuation control arrangement is provided, which has at least three independently axially displaceable cam elements and a switch gate which has at least one continuous gate track for displacing the at least three cam elements sequentially one after the other. | 11-21-2013 |
| 20140137826 | CAMSHAFT WITH AN AXIALLY DISPLACEABLE CAM PACK - A camshaft includes a carrier shaft to be mounted rotatably in a shaft axis and at least one cam pack axially displaceable on the carrier shaft. The cam pack includes at least two cams and at least one adjusting member for axial adjustment of the cam pack. The cams and adjusting member are interconnected in an axially adjacent configuration by an integrally molded body. The body is integrally molded on at least one cam and the adjusting member by an original molding process and a composite structure is formed by the integrally molded body. The composite structure can be mounted in a direct configuration on the carrier shaft to be axially displaceable thereon. The cams and the adjusting member include inner toothing engaging in an axially displaceable manner with outer toothing of the carrier shaft. A cam pack and a method for producing a camshaft are also provided. | 05-22-2014 |
| 20140144401 | CAMSHAFT HAVING AN AXIALLY DISPLACEABLE CAM PACK - A camshaft includes a carrier shaft which can be mounted rotatably along a shaft axis and at least one cam pack disposed axially displaceably on the carrier shaft. The cam pack includes at least two cams and at least one adjusting member for axial adjustment of the cam pack. The cams and the at least one adjusting member are connected to one another in an axially adjacent configuration and can be mounted axially displaceably as a composite structure in a direct configuration on the carrier shaft. A method for producing a camshaft and a cam pack are also provided. | 05-29-2014 |
| 20140165940 | MULTIPLE VARIABLE VALVE LIFT APPARATUS AND ENGINE PROVIDED WITH THE SAME - A multiple variable valve lift apparatus may include a camshaft, a plurality of cams slidably fitted on the camshaft and each having a cam base with a guide groove and a cam lobe, a solenoid valve including an actuating rod capable of being selectively inserted into the guide groove of a cam in the plurality of cams, and a valve opening/closing unit capable of selectively coming in contact with any cam in the plurality of cams. | 06-19-2014 |
| 20140238326 | VALVE OPERATING DEVICE OF ENGINE - A valve operating device for an engine is provided. The device includes at least two cam elements per one shaft. End face cams are formed in opposing end faces of two adjacent cam elements, and the end face cams respectively have protruding portions being formed offset in phase so that the protruding portions overlap in the axial directions when the two cam elements are close to each other. A control member is provided, the control member is projected to an actuated position at which the control member is projected to engage with the end face cams so as to separate the adjacent cam elements from each other when the cam elements are close to each other, and the control member is retreated to a non-actuated position at which the control member is retreated from the actuated position. | 08-28-2014 |
| 20140251250 | MULTIPLE VARIABLE VALVE LIFT APPARATUS - A multiple variable valve lift apparatus has a simple design that efficiently operates without interference. The apparatus according may include: a camshaft formed in a hollow cylinder shape; a control shaft disposed in the hollow of the camshaft; a cam that rotates together with the camshaft; a cam rod connecting the control shaft with the cam to move together; an operating unit disposed on the exterior circumference of the camshaft to rotate together with the camshaft; an operating unit rod connecting the control shaft with the operating unit such that the control shaft and the operating unit move together; a solenoid selectively connected with the operating unit, and moving the operating unit along an axial direction of the camshaft; and a tappet contacting the cam to transform rotational motion of the cam to rectilinear motion of a valve. | 09-11-2014 |
| 20140261267 | MULTISTAGE VARIABLE VALVE LIFT APPARATUS, SYSTEM AND ENGINE - A multistage variable valve lift apparatus includes: a camshaft; a plurality of cams slidably provided on the camshaft and each including a cam base with a guide projection and a cam lobe; a solenoid unit that includes an operating rod with a guide slot into which the guide projection is selectively inserted; and a valve opening/closing portion that comes into selective contact any one of the plurality of cams. | 09-18-2014 |
| 20150047588 | 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. | 02-19-2015 |
| 20150047589 | CAMSHAFT ASSEMBLY - A camshaft assembly includes a base shaft extending along a longitudinal axis. The base shaft is configured to rotate about the longitudinal axis. The camshaft assembly further includes a series of lobe packs mounted on the base shaft. The lobe pack includes a first cam lobe, a second cam lobe, and a third cam lobe. The lobe pack further includes a barrel cam defining a control groove. The camshaft assembly further includes an actuator including an actuator body and at least one pin movably coupled to the actuator body. The lobe pack is configured to move axially relative to the base shaft between a first position, a second position, and a third position. These three lobe pack positions are used to define three discrete valve lift profiles for the intake or exhaust valves in the cylinder. The lift profiles can be different for each engine valve. | 02-19-2015 |
| 20150053158 | VARIABLE VALVE TIMING CONTROL APPARATUS - A variable valve timing control apparatus includes a driving-side rotation member, a driven-side rotation member, an intermediate lock mechanism including first and second lock members, first and second recess portions, and a guide groove, a sensor, and a control portion. The control portion performs a control so that the relative rotation phase is changed until a first stop state is established in a state where the relative rotation phase is in an unlocked state and one of the first and second lock members is positioned relative to one of the first and second recess portions at which the guide groove is formed at a side opposite from a side where the guide groove is formed. The control portion reverses a change direction of the relative rotation phase after the first stop state is established so that the relative rotation phase is changed until a second stop state is established. | 02-26-2015 |
| 20150059675 | MULTIPLE VARIABLE VALVE LIFT APPARATUS - A multiple variable valve lift apparatus may include a camshaft rotating by drive of an engine, at least two cam portions slidably disposed on the camshaft and rotatable together with the camshaft, and forming a high cam and a low cam, a valve opening/closing unit operated by one of the high or low cams, at least two operating unit movable along the camshaft to move the at least two cam portions along the camshaft, a control portion selectively moving the operating unit along the camshaft, a pin disposed at the control portion, and a guide rail formed in a groove shape on an exterior circumference of the operating unit such that the pin is insert therein and guiding relative movement of the pin according to rotation of the camshaft and the operating unit such that the operating unit is moved along an axial direction of the camshaft by the pin. | 03-05-2015 |
| 20150059676 | MULTIPLE VARIABLE VALVE LIFT APPARATUS - A multiple variable valve lift apparatus may include a camshaft rotating by drive of an engine, at least two cam portions disposed on the camshaft to be movable along an axial direction of the camshaft and to be rotated together with the camshaft, and forming a high cam and a low cam, a valve opening/closing unit operated by one of the high cam or the low cam formed at the cam portion, an operating unit disposed on the camshaft to move together with one of the at least two cam portions, a solenoid selectively moving the operating unit along an axial direction of the camshaft, a interlock unit rotating together with the camshaft, and disposed between one and the other of the cam portions on the camshaft to be movable along an axial direction of the camshaft, and a pin operating unit selectively moving the interlock unit along the camshaft. | 03-05-2015 |
| 20150059677 | DEVICE FOR A VALVE TRAIN FOR CHANGING THE LIFT OF GAS EXCHANGE VALVES OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a device for a valve train for changing the lift of gas exchange valves of an internal combustion engine, having a camshaft rotatably mounted in a housing, which camshaft consists of an arrangement of, in succession coaxially from the inside to the outside, at least one push rod, at least one carrier shaft and at least one cam unit provided with at least two different cams and at least one thrust pin, and the cam shaft is surrounded at least partially by at least one shift gate mounted non-rotatably and axially movably in the housing. At least one change-over pin and at least one support pin are immovably connected to the push rod, wherein the change-over pin and the support pin extend in openings at least right through the carrier shaft and the change-over pin can be brought into operative contact with at least one switching contour on the shift gate and the support pin can be brought into operative contact with at least one support contour on the shift gate | 03-05-2015 |
| 20150075467 | VALVE GEAR OF ENGINE - A cam element portion comprises a slant portion (reverse-rotation return slope portion), which is positioned on a rotary-delay side from a maximum-lift portion (lift ending point) of an end-face cam and slants inward toward the rotary-delay side from an outer peripheral face of the end-face cam. Accordingly, in a valve gear of an engine in which cams operative to control opening/closing of a valve are switchable, it can be properly prevented that the cam element portion is switched unexpectedly and improperly or an operational member breaks down which are possibly caused by an engine's reverse rotation. | 03-19-2015 |
| 20150075468 | VALVE GEAR OF ENGINE - A cam element portions is configured such that respective maximum lift portions (lift ending points) of both-side end-face cams thereof are provided at respective phases which are different from each other in a rotational direction and that a maximum value of a length, in an axial direction, between respective cam faces of the both-side end-face cams which are provided at the same phase is set to be a distance, in the axial direction, between a first operational member and a second operational member or smaller. Accordingly, in a valve gear of an engine in which cams operative to control opening/closing of a valve are switchable, it can be properly prevented that a camshaft locks and stop rotating because of an operational malfunction of an operational member or the like. | 03-19-2015 |
| 20150083065 | CAMSHAFT ADJUSTING DEVICE - A camshaft adjusting device ( | 03-26-2015 |
| 20150083066 | CAMSHAFT PHASER SYSTEM - A camshaft phaser system including an output drive element non-rotatably connected to a camshaft, and a control valve disposed in a central receptacle of the output drive element, the control valve extending axially into a central bore of the camshaft and being formed with at least a first operating port and a second operating port axially spaced apart therefrom. The control valve is axially disposed such that the first operating port is axially positioned in the camshaft. | 03-26-2015 |
| 20150122209 | VALVE DRIVE OF AN INTERNAL COMBUSTION ENGINE - A valve drive of an internal combustion engine is disclosed, having at least one main camshaft, on which at least one cam carrier is provided such that it is fixed so as to rotate with said main camshaft and can be displaced axially between at least two axial positions, wherein at least one valve actuating cam for actuating a gas exchange valve of the internal combustion engine is assigned to the cam carrier. The valve actuating cam is mounted rotatably and a rotary angular position of the valve actuating cam with regard to the cam carrier can be set by means of an adjusting device. | 05-07-2015 |
| 20150136052 | 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. | 05-21-2015 |
| 20150300216 | CAMSHAFT FOR A VARIABLE-STROKE EXCHANGE VALVE TRAIN - A camshaft of a sliding cam valve train in an internal combustion engine is provided. A cam piece ( | 10-22-2015 |
| 20150308302 | VALVE GEAR FOR AN INTERNAL COMBUSTION ENGINE - A sliding cam valve train for an internal combustion engine is provided. A cam piece ( | 10-29-2015 |
| 20150322826 | VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE - A device includes a timing sprocket configured to receive a rotational force from a crankshaft and includes an annular internal-teeth constituting portion having an inner circumferential portion formed with internal teeth; an eccentric shaft portion provided on a motor output shaft of an electric motor and formed in a cylindrical shape such that an outer circumferential surface of the eccentric shaft portion is eccentric relative to a rotational center of the eccentric shaft portion; and a plurality of rollers provided between the internal teeth and the eccentric shaft portion and having total number smaller than total number of the internal teeth. A laser hardening is performed from a tooth top and both tooth surfaces of each internal tooth to attain a high degree of hardness. On the other hand, a tooth bottom surface of each internal tooth is not treated with the laser hardening. | 11-12-2015 |
| 20150369089 | A DEVICE FOR EFFECTING AN AXIAL SHIFT OF A ROTARY SHAFT FOR USE IN A VARIABLE CAMSHAFT DRIVE MECHANISM - A device for effecting an axial shift of a rotary shaft such as the camshaft of a vehicle comprising a first component having a shaft and a head, a second component having a first end and second end and a bore extending longitudinally there through, the shaft of the first component being inserted into the bore of the second component, a detent couples the first component to the second component such that rotation of the second component causes the first component to rotate wherein the first end of the second component is countersunk so as to define inclined ramps in walls of the second component and one or more rollers are disposed between the head of the first component and the first end of the second component in rolling contact with the inclined ramps, wherein as the second component is rotated about a longitudinal axis the rollers move along the inclined ramps and act upon the first component to move it axially with respect to the second component which may be arranged to rotate the first component with respect to the second component. In this way the timing of the valves of a combustion engine can be varied with rotational speed of the crankshaft of the engine. | 12-24-2015 |
| 20150377094 | DETENT ASSEMBLY AND A METHOD OF ASSEMBLING THE DETENT ASSEMBLY - A detent assembly and a method of assembling the detent assembly are disclosed. The detent assembly includes a first shaft rotatable about a longitudinal axis and has an outer surface. The first shaft defines a cavity having an opening defined by the outer surface. The detent assembly further includes a camshaft defining an aperture along the longitudinal axis to present an inner wall of the camshaft that circumscribes the longitudinal axis. The inner wall defines a plurality of recesses spaced from each other. The detent assembly also includes a self-contained plunger unit that is secured to the first shaft in the cavity as a unit. A plunger of the self-contained plunger unit engages the inner wall as the camshaft is disposed over the self-contained plunger unit so that the plunger rests in one of the recesses of the camshaft to selectively secure together the first shaft and the camshaft. | 12-31-2015 |
| 20160032796 | DRIVE APPARATUS - A profile radius change rate, which is an amount of change in a profile radius of a drive cam relative to a rotational angle of the drive cam in a pocket boundary section located between a progressively changing portion and a pocket portion, is set such that a boundary sound pressure, which is a sound pressure generated when a contact point between a roller and the drive cam passes through the pocket boundary section in response to the rotational movement of the drive cam, is included in a reference sound pressure range, which is a range of variation in a sound pressure generated when the contact point passes through the progressively changing portion. | 02-04-2016 |
| 20160076411 | MULTI-POSITIONAL CAMSHAFT PHASER WITH SWITCHABLE ONE-WAY WEDGE CLUTCHES - A camshaft phaser including a rotatable stator arranged to receive torque from an engine, a hub arranged to non-rotatably connect to a camshaft and including first and second pluralities of circumferentially disposed ramps, a first wedge plate including: a first aperture and a third plurality of circumferentially disposed ramps engaged with the first plurality of circumferentially disposed ramps, a second wedge plate including: a second aperture and a fourth plurality of circumferentially disposed ramps engaged with the second plurality of circumferentially disposed ramps, and an engagement assembly including a shaft extending axially through the first and second apertures. For an advance or retard mode, the shaft is arranged to be displaced axially so that the hub is rotatable with respect to the stator in a first or second circumferential direction. | 03-17-2016 |
| 20160090877 | 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. | 03-31-2016 |
| 20160090921 | 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. | 03-31-2016 |
| 20160102587 | CYLINDER HEAD OF AN INTERNAL COMBUSTION ENGINE WITH AT LEAST ONE CAMSHAFT - A cylinder head of an internal combustion engine includes a camshaft configured to actuate gas-exchange valves of the internal combustion engine. The camshaft has two cam segments that are joined to each other in such a manner that the cam segments cannot rotate with respect to each other, but are moveable axially relative to each other. End faces of the bearing sites of the cam segments each have splines running radially along respective outer circumferential surfaces of the cam segments. A camshaft bearing has an inner bearing ring with splines being formed on an inner surface. The splines of the inner bearing ring completely penetrate the axial course of the inner surface and the splines of the adjacent cam segments intermesh with the splines of the inner bearing ring on both sides thereof such that the inner bearing ring forms a non-rotating connection between the camshaft segments. | 04-14-2016 |
| 20160130990 | CAMSHAFT FOR AN INTERNAL COMBUSTION ENGINE AND USE THEREFORE - A camshaft for an internal combustion engine, with a drivable basic shaft and a cam piece which is mounted in the basic shaft, wherein the basic shaft passes through a passage in the cam piece, and the cam piece is mounted in the basic shaft in a rotationally fixed and axially displaceable manner. In the case of such a camshaft, it is provided that the basic shaft has a polygonal profile, and the passage in the cam piece has a complementary polygonal profile for receiving the basic shaft. The camshaft is preferably used in a motorcycle which has an internal combustion engine with two cylinders. | 05-12-2016 |
