DE19611641C1 - Valve operating cam drive for combustion engines - Google Patents

Valve operating cam drive for combustion engines

Info

Publication number
DE19611641C1
DE19611641C1 DE19611641A DE19611641A DE19611641C1 DE 19611641 C1 DE19611641 C1 DE 19611641C1 DE 19611641 A DE19611641 A DE 19611641A DE 19611641 A DE19611641 A DE 19611641A DE 19611641 C1 DE19611641 C1 DE 19611641C1
Authority
DE
Germany
Prior art keywords
cam
camshaft
actuating
profile
valve train
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE19611641A
Other languages
German (de)
Inventor
Klaus Tiede
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Porsche SE
Original Assignee
Porsche SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Porsche SE filed Critical Porsche SE
Priority to DE19611641A priority Critical patent/DE19611641C1/en
Priority claimed from DE1997500135 external-priority patent/DE59700135D1/en
Application granted granted Critical
Publication of DE19611641C1 publication Critical patent/DE19611641C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/34413Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using composite camshafts, e.g. with cams being able to move relative to the camshaft
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L1/053Camshafts overhead type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00Valve arrangements comprising rollers

Abstract

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.

Description

The invention relates to a valve train of an internal combustion engine according to the genus of Main claim.

Such a valve train is described for example in DE 42 30 877 A1 and shows a camshaft on which a cam block with two different Cam tracks are rotatably but axially displaceably guided. The cam block takes part a gas exchange valve of the internal combustion engine, depending on Working position of the cam block on the stroke of one of the two cam tracks the gas exchange valve is transmitted. In the area of one of the two end faces of the Cam block, a spiral guide groove is worked into the camshaft which a spring-loaded swivel bracket can engage. This swivel bracket attaches when engaging in the spiral groove depending on the rotational position of the Camshaft on the front of the cam block. This will make it against the Effect of a compression spring due to the positive guidance in the guide groove in the axial Direction moves, so that a switch from a first cam track that with the Gas exchange valve interacts, takes place to the second cam track. Upon reaching the second working position of the cam block is this by a hydraulic actuated locking element fixed. The spiral groove runs only over part of the Circumferential surface, the bracket element being disengaged at the end of the spiral groove. After releasing the hydraulic lock, the cam block can then due to the Effect of the compression spring can be moved back to its original position. The Spiral groove in the camshaft is designed and in a defined Angular assignment to the rotary movement of the camshaft positioned that the Shifting the cam block only during the base circle phase of the first Cam track can take place. However, the camshaft for such a valve train is very complex to manufacture because the spiral groove for each cam block to be operated must be assigned at the correct angle. In addition, the attachment of a such groove in the camshaft several machining operations, so that a total the production of the camshaft is complex and expensive. Furthermore, the means  Attaching such a spiral groove in the camshaft a not inconsiderable Cross-section reduction, so that under certain circumstances the shaft diameter relative must be chosen large to the forces and resulting from the valve train To be able to record moments. In addition, the actuation is springy stored swivel bracket complex and requires a not inconsiderable Installation space. Incorrect switching due to the resilient bearing cannot be ruled out. Furthermore, such an actuation only switches between two Cam tracks possible.

In contrast, it is an object of the invention to provide such a valve train To improve the internal combustion engine so that the camshaft together with the Slidable cams can be manufactured overall cheaper and easier can and the assignment of the stroke profile to the respective rotational position of the moving cam in the manufacture and assembly is simplified.

This object is achieved with the characterizing features of Claim 1 solved. By designing the lifting profile on the cam, one can machining of the stroke profile independent of the shaft. The wave itself is no longer affected in its cross section, so that even very small Shaft diameters are possible. In addition, the correct positioning of the lifting profile for the axially displaceable cam is easier to ensure because the cam track and the lifting profile are formed on the same component. Position deviations or phase deviations of the cam base circle and stroke profile cannot occur during assembly. The camshaft itself can do this for example as a drawn and therefore inexpensive component. It is still possible, the camshaft made of relatively inexpensive material to produce, since the forces and caused by the displacement movement Impact moments in the cam itself, which is already due to its Operating loads necessary higher material quality is made. The works Cams advantageously arranged radially to the camshaft Actuating pin together, which can be slidably brought into engagement with the lifting profile is. Such an arrangement can with very little construction and space  Cylinder head can be arranged and enables safe operation without the Danger of incorrect switching.

A particularly advantageous valve train with three different valve lift curves per cam results when three cam tracks are arranged one behind the other. The Moving the cam with these three cam tracks is particularly advantageous, if two cam profiles are formed on the cam, each on one end face of the Are formed.

A particularly advantageous actuation of the axially displaceable cam results if each lifting profile interacts with two axially spaced actuating pins that when engaging in the stroke profile depending on the starting position of the cam Trigger axial movements. Especially when using two lifting profiles can thus on the use of restoring elements in the form of compression springs or the like can be dispensed with. This also means that the caused Incorrect switching can be avoided.

Securing the cam in its respective axial position can be particularly special done easily by spring-loaded latching elements, which in one of the respective Engage the locking groove assigned to the working position on the cam.

Further advantages and advantageous developments of the invention result from the Subclaims and the description.

An embodiment of the invention is in the following description and Drawing explained in more detail. The latter shows in

Fig. 1 is a simplified cross-section through the valve drive of the internal combustion engine,

Fig. 2 shows a longitudinal section through a camshaft and shown only partially

Fig. 3 is a settlement of the cam circumference and the lifting profiles.

The valve train of the internal combustion engine in simplified form in Fig. 1 shown is a gas exchange valve 1, which cooperates with a known roller cam 2, the roller 3 rests against the cam track 4 of a cam 5. The cam 5 is rotatably but axially displaceably guided on a camshaft 6 which is driven in a manner known per se. The interaction of the cam track 4 with the roller 3 of the roller finger follower 2 converts the rotary movements of the camshaft 6 into stroke movements of the gas exchange valve 1 .

The cam 5 has three axially adjacent cam tracks 4 a to 4 c ( FIG. 2), which differ in their valve lift profile, their lift height and / or their phase position. The width of the cam tracks 4 a to 4 c is chosen so that it is slightly larger than the width of the roller 3 of the roller finger follower 2 , so that in operation of the internal combustion engine, one cam track with the roller 3 of the roller finger follower 2 and thus with the gas exchange valve 1 cooperates.

In order to bring the roller rocker arm 2 into engagement with one of the three cam tracks 4 a to 4 c, the cam 5 is guided axially displaceably on the camshaft 6 . For this purpose, it has an axially extending profiling on its circumference, which cooperates with a corresponding profiling of the cam 5 and thus enables the rotary movement to be transmitted with simultaneous axial displaceability. The cam 5 has on its two end faces each a cylindrical extension 7 , 8 , in each of which a lifting profile 9 , 10 extending over part of the circumference is incorporated in the form of a recess. Two actuating elements 11 , 12 are arranged in the region of the cylindrical extension 7 , two further actuating elements 13 , 14 are arranged in the region of the cylindrical extension 8 . These actuating elements 11 to 14 each have an actuating pin 15 to 18 , which extends approximately radially to the camshaft 6 and is axially displaceable. In the exemplary embodiment shown here, the actuating pins 15 to 18 are designed as hydraulic pistons which can be axially displaced in the direction of the camshaft 6 by pressurizing the actuating elements 11 to 14 against the action of a compression spring 31 .

The actuating elements 11 to 14 with their actuating pins 15 to 18 are arranged such that, depending on the axial position of the cam 5, the actuating pins bear against the cylindrical extension 7 or 8 when the actuating elements are pressurized and depending on the rotational position of the camshaft 6 and Engage cam 5 in the respectively assigned lifting profile 9 or 10 . If one of the actuating pins 15 to 18 engages in the respectively assigned lifting profile 9 or 10 , the cam 5 is axially displaced due to the curve profile of the lifting profile 9 or 10 . The interaction of the lifting profile 9 (left lifting profile according to FIG. 2) with the actuating pins 15 or 16 produces a shift from the respective starting position to the left. By interaction of one of the actuating pins 13 or 14 with the stroke profile 10 (right stroke profile according to FIG. 2), the cam 5 correspondingly causes a shift of the cam 5 from its respective working position to the right. By changing the slope direction of the lifting profile, a reversal of the adjustment direction is easily possible.

In cooperation with the actuating elements 11 to 14, the cam 5 has three different working positions I to III, in each of which one of the cam tracks 4 a to 4 c cooperates with the roller 3 of the roller finger follower 2 . In order to lock the cam 5 in its respective working position I to III, it has three annular circumferential grooves 19 to 21 on its inner peripheral surface. In the camshaft 6 , a detent ball 23 is guided in a cylindrical recess 22, which engages in one of the three grooves 19 to 21 by the action of a spring element 24 .

In the position of the cam shown in FIG. 2, it is locked in the middle working position II by the detent ball 23 in cooperation with the groove 20 . In this working position II, the roller 3 of the roller finger follower 2 interacts with the cam track 4 b. If the valve train is to be switched over from this starting position such that the gas exchange valve follows the stroke of the cam track 4 c, the actuating pin 15 is lowered by pressurizing the actuating element 11 . This then lies on the cylindrical extension 7 and, when the assigned rotational position of the cam is reached, engages in the lifting profile 9 , in the course of which the cam is moved to the left. Fig. 3 shows essentially a representation of the active levels, ie the assignment of stroke profiles and cam profile (base circle area 25 , 25 'and elevation area 30 , 30 '). The correct assignment of the stroke profiles to the cam profile depends on the angular position of the adjustment elements. At the end of the lifting profile 9 , the cam 5 has reached its left end position, which corresponds to the working position III, and in which the roller 3 interacts with the cam track 4 c. The stroke profiles 9 and 10 are designed in their extension and angular assignment so that the axial displacement takes place only as long as the roller 3 in the base circle region 25 abuts the respective cam tracks 4 a to 4 c. The cam tracks 4 a to 4 c are designed such that they each have a base circle region 25 which runs at least over the major part of its length parallel and at the same height to the base circle regions of the adjacent cam tracks. This base circle region 25 of the cam tracks is assigned the base circle region 25 'of the lifting profiles 9 , 10 or the cylindrical extensions 7 , 8 , which is angularly displaced depending on the spatial position of the adjusting elements. After switching position III is reached, the actuating element 11 is depressurized, so that the actuating pin 11 is moved back into its starting position by the action of the compression spring 31 . The cam 5 is held in its switching position due to the detent. If the pressure applied to the respective adjusting element is not removed after the cam has reached the end position, this has no influence on the adjusting movement. The respective actuating pin then remains in contact with the respective cylindrical extension, but only comes into engagement with it in the outlet area of the respective lifting profile, so that no adjustment takes place. The respective inlet area 26 , 27 and outlet area 28 , 29 of the lifting profiles 9 , 10 merge into the circumferential surface of the cylindrical extensions without a step.

If the cam is to be moved back from the working position III into the middle working position II, the actuating element 13 is pressurized so that the actuating pin 17 rests on the cylindrical extension 8 and engages in the stroke profile 10 when the base circle phase is reached. Through the interaction of the actuating pin 17 and the lifting profile 10 , the cam is moved back into the middle working position II.

The cam is shifted from the middle working position II into the right working position I by actuating the actuating element 14 , which also interacts with the lifting profile 10 and moves the cam to the right. The cam is returned to the middle working position II in an analogous manner by pressurizing the actuating element 12 which interacts with the lifting profile 9 .

Suitable control of the actuating elements 11 to 14 ensures that only one actuating pin 15 to 18 can be lowered at a time, while the three other actuating pins are moved back into their initial position and remain there.

In contrast to the exemplary embodiment shown here, the actuation elements 11 to 14 can also be actuated pneumatically, purely mechanically or electromagnetically. Instead of the roller finger follower shown and described, it is also possible to use other - known per se - transmission mechanisms which convert the rotary movement of the cam into a lifting movement of the gas exchange valve.

Claims (6)

1.Valve drive of an internal combustion engine with a camshaft ( 6 ) with cams ( 5 ) for actuating gas exchange valves ( 1 ), of which at least one cam is provided with a plurality of cam tracks ( 4 a to 4 c) arranged axially one behind the other and is rotationally fixed but axially displaceable on the camshaft is guided, and with a stroke profile ( 9 , 10 ) in the direction of the camshaft axis, which cooperates with at least one actuating element ( 11 to 14 ) for axially displacing the cam, characterized in that the stroke profile ( 9 , 10 ) on the cam ( 5 ), and the actuating element ( 11 to 14 ) has an actuating pin ( 15 to 18 ) arranged radially to the camshaft, which can be brought radially displaceably into or out of engagement with the lifting profile ( 9 , 10 ).
2. Valve train according to claim 1, characterized in that the lifting profile ( 9, 10 ) is formed by a cam track which is formed in a cylinder section ( 7 , 8 ) arranged adjacent to the cam tracks.
3. Valve train according to one of the preceding claims, characterized in that the displaceable cam ( 5 ) with three successively arranged cam tracks ( 4 a to 4 c) is provided, and in that two cam profiles ( 9 , 10 ) are formed on the cam, between which the cam tracks run.
4. Valve gear according to one of the preceding claims, characterized in that each lifting profile ( 9 , 10 ) depending on the axial switching position of the cam ( 5 ) with one of two actuating pins ( 15 , 16 ; 17) spaced apart in the axial direction of the camshaft , 18 ) cooperates.
5. Valve train according to one of the preceding claims, characterized in that between the displaceable cam ( 5 ) and the camshaft ( 6 ) a locking means ( 19 to 24 ) is arranged, which latches the cam in its respective axial switching position.
6. Valve train according to one of the preceding claims, characterized in that the latching means is a spring-loaded ball ( 23 ) which engages in a respective latching groove ( 19 , 20 , 21 ).
DE19611641A 1996-03-25 1996-03-25 Valve operating cam drive for combustion engines Expired - Fee Related DE19611641C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19611641A DE19611641C1 (en) 1996-03-25 1996-03-25 Valve operating cam drive for combustion engines

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19611641A DE19611641C1 (en) 1996-03-25 1996-03-25 Valve operating cam drive for combustion engines
DE1997500135 DE59700135D1 (en) 1996-03-25 1997-02-15 Valve train of an internal combustion engine
EP97102494A EP0798451B1 (en) 1996-03-25 1997-02-15 Valve control of an internal combustion engine
KR1019970010097A KR100416895B1 (en) 1996-03-25 1997-03-24 Valve drive device of internal combustion engine
JP06933997A JP3980699B2 (en) 1996-03-25 1997-03-24 Valve driving device for internal combustion engine

Publications (1)

Publication Number Publication Date
DE19611641C1 true DE19611641C1 (en) 1997-06-05

Family

ID=7789283

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19611641A Expired - Fee Related DE19611641C1 (en) 1996-03-25 1996-03-25 Valve operating cam drive for combustion engines

Country Status (4)

Country Link
EP (1) EP0798451B1 (en)
JP (1) JP3980699B2 (en)
KR (1) KR100416895B1 (en)
DE (1) DE19611641C1 (en)

Cited By (87)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19945340A1 (en) * 1999-09-22 2001-03-29 Schaeffler Waelzlager Ohg Valve gear for different strokes of gas change valve of internal combustion engine; has cam group of at least two cams on camshaft and cam follower with switch slider supported in grooves on camshaft
DE10054623A1 (en) * 2000-11-03 2002-05-08 Audi Ag Device for changeover of cam pack on camshaft to operate gas exchange valves has actuating element in form of pin movable radially outwards and in extended state interacting with slide tracks in guide section
DE10148178A1 (en) * 2001-09-28 2003-04-17 Ina Schaeffler Kg Method for reduction of fuel consumption and exhaust emissions of 4-stroke IC engines with at least one cylinder being operated in 8-stroke method with three high-pressure loops suitable for ignition
DE10349902A1 (en) * 2003-10-25 2005-06-23 Audi Ag Valve drive for an I.C. engine comprises a camshaft with a cam piece with cams having running surfaces
DE102004008670A1 (en) * 2004-02-21 2005-09-08 Ina-Schaeffler Kg Valve drive with cam switching for the gas exchange valves of a 4-stroke internal combustion engine
DE102004022849A1 (en) * 2004-05-08 2005-12-15 Audi Ag Valve drive for combustion engines comprises a camshaft on which a cam support is fixed
DE102004024219A1 (en) * 2004-05-15 2006-01-19 Audi Ag Valve train assembly for internal combustion engine, has cam support adjustably arranged to shift in axial direction as actuator is fitted into cam track, in which cam track is divided into segments indicating different functions
DE102007010150A1 (en) * 2007-03-02 2008-09-04 Audi Ag Valve drive for gas exchange valves has locking device fixed in position in housing of internal combustion engine
DE102007010156A1 (en) * 2007-03-02 2008-09-04 Audi Ag Valve drive unit for a combustion engine comprises an adjusting unit having interacting elements which interact alternately with a curved connecting part
DE102007010149A1 (en) * 2007-03-02 2008-09-04 Audi Ag Automotive piston engine gas valve timer has right- and left-handed grooves are located immediately alongside and translating into each other
DE102007024600A1 (en) 2007-05-25 2008-11-27 Schaeffler Kg Operating device for controlling stroke variable valve gear of internal combustion engine, has latching element stressing actuator pin supporting surface by force in extending direction of pin in operating position of pin
DE102007024598A1 (en) 2007-05-25 2008-11-27 Schaeffler Kg Regulation device has housing and controllable holding and release device to hold actuator pin in retaining position and to release actuator pin from retaining position
US7472671B2 (en) 2004-07-30 2009-01-06 Schaeffler Kg Valve engine
WO2009018991A1 (en) 2007-08-07 2009-02-12 Eto Magnetic Gmbh Device for camshaft adjustment in an internal combustion engine
WO2009021669A1 (en) * 2007-08-10 2009-02-19 Daimler Ag Internal combustion engine valve train switching device
WO2009030434A1 (en) * 2007-09-08 2009-03-12 Daimler Ag Internal combustion engine valve train switching device
WO2009049801A1 (en) * 2007-10-12 2009-04-23 Daimler Ag Valve train devices
WO2009056221A1 (en) * 2007-11-02 2009-05-07 Daimler Ag Valve operating mechanism
DE102008020892A1 (en) 2008-04-25 2009-10-29 Schaeffler Kg Adjusting device for adjusting variable-lift valve drive of internal combustion engine, has controlling mechanism controllably transferring stop valve in retracting direction of actuating pin to release actuating pin from holding position
DE102008020893A1 (en) 2008-04-25 2009-10-29 Schaeffler Kg Electromagnetic adjusting device for controlling stroke-variable valve impulse of internal-combustion engine of motor vehicle, has diagnostic current circuit closed in one of positions by contact of armature with contact element
WO2009152985A1 (en) * 2008-06-20 2009-12-23 Daimler Ag Valve train device
DE202009015468U1 (en) 2009-06-25 2010-02-25 Schaeffler Kg Electromagnetic actuator
DE202009015466U1 (en) 2009-02-27 2010-03-18 Schaeffler Kg Electromagnetic actuator
WO2010091798A1 (en) * 2009-02-14 2010-08-19 Schaeffler Technologies Gmbh & Co. Kg Valve drive of an internal combustion engine
DE102009015486A1 (en) 2009-03-28 2010-09-30 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuator comprises housing with electrically energized magnetic coil device, and magnetic coil device generates magnetic field, where stationary core area is commonly assigned to permanent magnets
DE102009016902A1 (en) 2009-04-08 2010-10-14 Schaeffler Technologies Gmbh & Co. Kg Cam shaft for stroke-variable actuation of gas exchange valves of four-cylinder four-valve engine, has cam pieces, where number of cam pieces is lesser than number of engine cylinders whose associated gas exchange valves operate shaft
DE202009011804U1 (en) 2009-09-01 2011-01-13 Eto Magnetic Gmbh Device for adjusting the camshaft of an internal combustion engine
DE102009053121A1 (en) 2009-11-13 2011-05-19 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuating device for controlling stroke-variable valve drive of internal-combustion engine, has locking pins subjected with force by magnetic circuit in electromagnet in extending direction for blocking latch
WO2011067142A1 (en) 2009-12-02 2011-06-09 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuating device
DE102010007023A1 (en) 2010-01-29 2011-08-04 Dr. Ing. h.c. F. Porsche Aktiengesellschaft, 70435 Internal combustion engine, has cylinder in which combustion chamber is limited between piston and cylinder head, where valve lift at inlet valve is maintained in high load range and another valve lift at another inlet valve is adjustable
DE102010036899A1 (en) 2010-08-06 2012-02-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine
CN101749063B (en) * 2008-11-27 2012-05-02 Dr.Ing.h.c.F.保时捷股份公司 Valve drive of an internal combustion engine
DE102011001125A1 (en) 2011-03-07 2012-09-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve train for an internal combustion engine
DE102011001123A1 (en) 2011-03-07 2012-09-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine has camshafts and sliding cam that are positioned in housing of another camshaft which is positioned between head cover and lower portion of cylinder
DE102011001124A1 (en) 2011-03-07 2012-09-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve train for optimizing load movement in combustion chamber of combustion engine, has link portion including two reconducting elements for pins, where pins are axially displaceable in radially outward direction by reconducting elements
DE102011001288A1 (en) 2011-03-15 2012-09-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine has latching element with latching recesses that is supported in cylinder head or in cylinder head cover or in bearing unit of cam shaft
DE102011001711A1 (en) 2011-03-31 2012-10-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve train for internal combustion engine, has bearing sleeves fixed on side portions of sliding sleeve, and camshaft bearings axially displaceable with respect to bearing sleeves and rotatably mounted on camshaft
DE102011001661A1 (en) 2011-03-30 2012-10-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve train for internal combustion engine, has clearance portion that is formed axially between the centering section and torque transmitting portion
DE102011001659A1 (en) 2011-03-30 2012-10-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve-train for optimizing load movement in combustion chamber of combustion engine, has two separated portions respectively formed on camshaft and cam for centering cam on camshaft and for transmission of torque from camshaft to cam
DE102011001660A1 (en) 2011-03-30 2012-10-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve drive for optimizing charge movement of combustion chamber of internal combustion engine, has centering section formed such that multiple centering projections are formed and distributed radially outside of camshaft over periphery
DE102011001625A1 (en) 2011-03-29 2012-10-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine has respective first latching element mounted in cylinder head or in cylinder head cover or in camshaft bearing device, such that sensor detects position of respective first latching element
DE102011050484A1 (en) 2011-05-19 2012-11-22 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine, has locking elements co-operating together with actuators, and cylinder head cover integrally formed with cylinder head, where one of locking element is supported in cylinder head or cylinder head cover
DE102011076726A1 (en) 2011-05-30 2012-12-06 Schaeffler Technologies AG & Co. KG Valve train for combustion piston engine, has actuating device with rocker arm, which is arranged adjacent to control body in radial manner with axial alignment, where rocker arm is pivoted around tangential axis
DE102011052912A1 (en) 2011-08-23 2013-02-28 Dr.Ing.H.C.F.Porsche Aktiengesellschaft Internal combustion engine and valve train for an internal combustion engine
DE102011084043A1 (en) 2011-10-05 2013-04-11 Schaeffler Technologies AG & Co. KG Sliding cam system for reciprocating internal combustion engines, has sliding cams which are arranged on engine-fixed base shaft, where sliding cams have cams with cam lifting chart and base circle
DE102011054218A1 (en) 2011-10-06 2013-04-11 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine i.e. multi-cylinder internal combustion engine, has rotatably mounted camshaft operating gas shuttle valves of cylinders, and common actuator effectuating axial displacement of sliding cams arranged on camshaft
DE102012103750A1 (en) 2012-04-27 2013-10-31 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Combustion engine has actuator whose movable pin is in operative position and not engaged in form-fitting of sliding sleeve
DE102012103751A1 (en) 2012-04-27 2013-10-31 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Combustion engine has sliding cam whose locking sleeve is provided in rest position of contour portion, and sliding cam which is axially displaced and engaged with sliding sleeve
WO2013178405A1 (en) 2012-05-30 2013-12-05 Schaeffler Technologies AG & Co. KG Sliding cam element for reciprocating piston internal combustion engines
CN103726893A (en) * 2012-10-11 2014-04-16 Dr.Ing.h.c.F.保时捷股份公司 Sliding cam arrangement for variable actuating gas exchange valves of an internal combustion engine
DE102012111856A1 (en) 2012-12-06 2014-06-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine for use with valve drive, has axially displaceable locking slide that is positioned radially outward on respective sliding cam together with respective sliding cam
DE102012112482A1 (en) 2012-12-18 2014-06-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for operating internal combustion engine of motor vehicle, involves performing axial displacement of respective slide cam dependent on axial displacement direction and/or dependent on valve clearance outside of cam base circle
DE102012112795A1 (en) 2012-12-20 2014-06-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine i.e. three cylinder internal combustion engine with valve drive, has sliding blocks mounted with rotation on displaceable pull rod and cooperate with segments
DE102005003079B4 (en) * 2005-01-22 2014-12-31 Audi Ag Internal combustion engine with a valve train
DE102013220554A1 (en) * 2013-10-11 2015-04-16 Schaeffler Technologies AG & Co. KG Hubvariabler valve drive of an internal combustion engine
DE10148177B4 (en) * 2001-09-28 2015-05-13 Schaeffler Technologies AG & Co. KG Valve train with valve lift switching for the gas exchange valves of a 4-stroke internal combustion engine
WO2015086157A1 (en) 2013-12-13 2015-06-18 Thyssenkrupp Presta Teccenter Ag Adjustable camshaft
DE10148179B4 (en) * 2001-09-28 2015-09-24 Schaeffler Technologies AG & Co. KG Valve train with valve lift switching for the gas exchange valves of a 4-stroke internal combustion engine
DE102014008156A1 (en) 2014-05-30 2015-12-03 Daimler Ag Valve train for an internal combustion engine
WO2015197777A1 (en) 2014-06-25 2015-12-30 Eto Magnetic Gmbh Device for adjusting a camshaft of an internal combustion engine
DE102014213249A1 (en) 2014-07-08 2016-01-14 Schaeffler Technologies AG & Co. KG Actuator unit with heating element
DE102015011907A1 (en) 2015-09-11 2016-04-07 Daimler Ag Valve train device, in particular for an internal combustion engine
DE102015200539A1 (en) 2015-01-15 2016-07-21 Schaeffler Technologies AG & Co. KG Actuator unit with heating element
DE102015105735A1 (en) 2015-04-15 2016-10-20 Volkswagen Aktiengesellschaft Method for operating a fuel pump for an internal combustion engine, fuel pump and internal combustion engine
DE102015012044A1 (en) 2015-09-15 2017-03-16 Daimler Ag Valve train device, in particular for an internal combustion engine
DE102004056290B4 (en) * 2004-11-22 2017-03-16 Audi Ag Valve gear of an internal combustion engine with at least one base camshaft
DE102015014175A1 (en) 2015-11-03 2017-05-04 Daimler Ag Valve drive device
DE102016200325A1 (en) 2016-01-14 2017-07-20 Bayerische Motoren Werke Aktiengesellschaft Valve train for an internal combustion engine
DE102017004387A1 (en) 2017-05-06 2017-11-02 Daimler Ag Valve train for an internal combustion engine of a motor vehicle, in particular a motor vehicle
DE102016012048A1 (en) 2016-10-07 2018-04-12 Promescon Gmbh Sliding cam valve drive for variable-stroke actuation of the gas exchange valves of an internal combustion engine
DE102016012197A1 (en) 2016-10-12 2018-04-12 Daimler Ag Valve drive device
DE102016220612A1 (en) * 2016-10-20 2018-04-26 Mahle International Gmbh Valve train for an internal combustion engine
WO2018077451A1 (en) 2016-10-29 2018-05-03 Daimler Ag Valve train device
DE102016120815A1 (en) 2016-11-02 2018-05-03 Volkswagen Aktiengesellschaft Internal combustion engine
DE102016012965A1 (en) 2016-10-29 2018-05-03 Daimler Ag Valve drive device
DE102016225049A1 (en) 2016-12-14 2018-06-14 Volkswagen Aktiengesellschaft Variable valve train for an internal combustion engine
DE102017104845A1 (en) 2017-03-08 2018-09-13 Schaeffler Technologies AG & Co. KG Internal combustion engine with variable-displacement gas exchange valve actuation
DE102017003789A1 (en) 2017-04-20 2018-10-25 Daimler Ag Valve train device, in particular for an internal combustion engine
DE102017207917A1 (en) * 2017-05-10 2018-11-15 Volkswagen Aktiengesellschaft Device for influencing the flow of a reaction gas in the combustion chamber of an internal combustion engine
US20180334933A1 (en) * 2017-05-16 2018-11-22 Hyundai Motor Company Multiple variable valve lift apparatus
DE102017114575A1 (en) 2017-06-29 2019-01-03 Man Truck & Bus Ag Variable valve train
DE102017116987A1 (en) 2017-07-27 2019-01-31 Man Truck & Bus Ag Sliding cam system and method for operating an internal combustion engine
DE102017116820A1 (en) 2017-07-25 2019-01-31 Man Truck & Bus Ag Sliding cam system
WO2019037943A1 (en) 2017-08-24 2019-02-28 Bayerische Motoren Werke Aktiengesellschaft Valve drive for an internal combustion engine
DE102018205730A1 (en) * 2018-04-16 2019-10-17 Mahle International Gmbh Rocker arm assembly and a valvetrain
US10662832B2 (en) 2018-05-04 2020-05-26 Man Truck & Bus Se Variable valve drive
US10697330B2 (en) 2015-11-03 2020-06-30 Daimler Ag Valve train device

Families Citing this family (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100378298C (en) * 2003-03-21 2008-04-02 奥迪股份公司 Valve drive of an internal combustion engine comprising a cylinder head
DE102004011586A1 (en) 2003-03-21 2004-10-07 Audi Ag Valve gear for internal combustion engine has facility whereby in first and second axial positions of cam carrier first and second stop faces fixed on cam carrier bear against respective first and second stop faces fixed on cylinder head
DE502004008185D1 (en) * 2003-07-19 2008-11-20 Porsche Ag Valve train for an internal combustion engine
DE10349898A1 (en) 2003-10-25 2005-05-25 Audi Ag Valve gear of an internal combustion engine with at least one camshaft
DE102004012756B4 (en) * 2004-03-15 2006-04-20 Siemens Ag Method and device for controlling an internal combustion engine
DE102004022832B4 (en) * 2004-05-08 2020-03-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve train for an internal combustion engine
DE102004029622A1 (en) * 2004-06-18 2006-01-12 Dr.Ing.H.C. F. Porsche Ag Valve operating element with valve actuating sections
DE102007013947A1 (en) 2007-03-23 2008-09-25 Schaeffler Kg Valve gear of an internal combustion engine with a deactivatable Tellerhubventil
DE102007037747A1 (en) 2007-08-10 2009-02-12 Daimler Ag combustion engine valve
DE102007040677A1 (en) 2007-08-29 2009-03-05 Schaeffler Kg Internal combustion engine with variable gas exchange valve drive
DE102007051739A1 (en) 2007-10-30 2009-05-07 Schaeffler Kg Valve gear of an internal combustion engine
DE102007052254A1 (en) * 2007-11-02 2009-05-07 Daimler Ag Valve drive device
DE102007054978A1 (en) * 2007-11-17 2009-05-20 Daimler Ag Valve drive device
DE102007056337A1 (en) * 2007-11-22 2009-05-28 Daimler Ag Valve drive device
JP4962370B2 (en) * 2008-03-21 2012-06-27 トヨタ自動車株式会社 Variable valve mechanism for internal combustion engine
WO2010012498A1 (en) * 2008-08-01 2010-02-04 Eto Magnetic Gmbh Electromagnetic actuating apparatus
JP5153562B2 (en) * 2008-10-16 2013-02-27 株式会社オティックス Variable valve mechanism
DE102008054254A1 (en) 2008-10-31 2010-05-06 Schaeffler Kg Camshaft for a variable-stroke valve drive of an internal combustion engine
US8251028B2 (en) 2008-11-05 2012-08-28 Toyota Jidosha Kabushiki Kaisha Valve operating apparatus for internal combustion engine
DE102008060170A1 (en) 2008-11-27 2010-06-02 Dr.Ing.H.C.F.Porsche Aktiengesellschaft Valve gear of an internal combustion engine
DE102009008422A1 (en) * 2009-02-11 2010-08-12 Daimler Ag Ventiltriebumschaltvorrichtung
WO2010103637A1 (en) 2009-03-12 2010-09-16 トヨタ自動車株式会社 Variable valve device for internal combustion engine
DE102009014086A1 (en) 2009-03-23 2010-09-30 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine
JP5093168B2 (en) * 2009-03-23 2012-12-05 トヨタ自動車株式会社 Control device for variable valve mechanism
DE102009014087A1 (en) 2009-03-23 2010-09-30 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine
DE102009021650A1 (en) 2009-05-16 2010-11-18 Schaeffler Technologies Gmbh & Co. Kg Valve drive for internal combustion engine has bearing journals of cams formed on first and second axial end sectors
JP4752949B2 (en) * 2009-05-28 2011-08-17 トヨタ自動車株式会社 Variable valve operating device for internal combustion engine
WO2011064845A1 (en) 2009-11-25 2011-06-03 トヨタ自動車株式会社 Variable valve gear for internal combustion engine
US8955476B2 (en) 2009-11-25 2015-02-17 Toyota Jidosha Kabushiki Kaisha Variable valve operating apparatus for internal combustion engine
DE102009059712A1 (en) * 2009-12-18 2011-09-22 Thyssenkrupp Presta Teccenter Ag Cam unit for a built camshaft
DE102010011897B4 (en) 2010-03-18 2016-08-25 Thyssenkrupp Presta Teccenter Ag Valve gear with camshaft with axially displaceable cam unit
DE102010012470A1 (en) 2010-03-24 2011-09-29 Schaeffler Technologies Gmbh & Co. Kg Valve train for internal combustion engine, has camshaft with carrier shaft and cam piece that is arranged between axial positions in movable manner
DE102010012471A1 (en) 2010-03-24 2011-09-29 Schaeffler Technologies Gmbh & Co. Kg Positioning device e.g. double positioning device, for three speed stroke-variable valve train of combustion engine, has current signal lines passed through one of positioning pins whose outer ends are connected with plug pins
JP5521718B2 (en) * 2010-04-07 2014-06-18 トヨタ自動車株式会社 Variable valve operating device for internal combustion engine
JP5510095B2 (en) * 2010-06-15 2014-06-04 トヨタ自動車株式会社 Variable valve operating device for internal combustion engine
DE102010035186A1 (en) 2010-08-24 2012-03-01 Schaeffler Technologies Gmbh & Co. Kg Valve train for use in internal combustion engine, has actuator associated to sensors and arranged on axial region for detecting instantaneous axial positions, where actuator is exactly assigned to cam pieces
DE102011003760A1 (en) 2010-11-29 2012-05-31 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuator
DE102010053359A1 (en) 2010-12-03 2012-06-06 Schaeffler Technologies Gmbh & Co. Kg Sliding cam system with sliding grooves and locks
DE102011003024A1 (en) 2011-01-24 2012-07-26 Schaeffler Technologies Gmbh & Co. Kg Slide cam system with friction lock
DE102011011456A1 (en) * 2011-02-17 2012-08-23 Daimler Ag Internal combustion engine valve train device
DE102011075537A1 (en) 2011-05-10 2012-11-15 Schaeffler Technologies AG & Co. KG Reciprocating internal combustion engine with camshaft adjusting device
DE102011075538A1 (en) 2011-05-10 2012-11-15 Schaeffler Technologies AG & Co. KG Built sliding cam unit
DE102011101400B4 (en) 2011-05-13 2013-02-07 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Valve train for internal combustion engines for actuating gas exchange valves
DE102011052822A1 (en) * 2011-08-18 2013-02-21 Thyssenkrupp Presta Teccenter Ag Camshaft, in particular for motor vehicle engines
WO2013042227A1 (en) * 2011-09-21 2013-03-28 トヨタ自動車株式会社 Variable valve device
DE102011085706A1 (en) 2011-11-03 2013-05-08 Schaeffler Technologies AG & Co. KG 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
JP5811039B2 (en) * 2012-06-04 2015-11-11 トヨタ自動車株式会社 Control device for internal combustion engine
DE102012109202A1 (en) 2012-09-28 2014-06-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve train for combustion engine, has ball thrust piece whose spherical end is co-acted with locking adjustable socket over locking lath that is arranged axially parallel to camshaft, where socket is slidably connected to sliding piece
KR101427958B1 (en) 2012-12-18 2014-08-11 현대자동차 주식회사 Mutiple variable valve lift appratus and engine provided with the same
KR101461890B1 (en) 2013-03-14 2014-11-14 현대자동차 주식회사 Mutiple variable valve lift appratus, mutiple variable valve lift system and engine provided with the same
DE102013213125A1 (en) 2013-07-04 2015-01-08 Schaeffler Technologies Gmbh & Co. Kg Sliding cam system with locking and position detection
DE102013218181A1 (en) 2013-09-11 2015-03-12 Schaeffler Technologies Gmbh & Co. Kg Sliding cam system with a sliding block
DE102013218908A1 (en) 2013-09-20 2015-03-26 Schaeffler Technologies Gmbh & Co. Kg Sliding sock system with cross pin
DE102013225066B4 (en) 2013-12-06 2015-07-16 Schaeffler Technologies AG & Co. KG Method for grinding a camshaft of a variable-stroke valve drive
US9482122B2 (en) * 2014-06-30 2016-11-01 GM Global Technology Operations LLC Detent assembly and a method of assembling the detent assembly
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DE102015203419B3 (en) * 2015-02-26 2016-08-25 Schaeffler Technologies AG & Co. KG Sliding cam system with an actuator pin which can be deactivated by means of a return stroke spring
DE102015204928A1 (en) 2015-03-19 2016-07-21 Schaeffler Technologies AG & Co. KG Sliding cam system with a sliding block mounted on an actuator housing
DE102015205775A1 (en) 2015-03-31 2016-07-21 Schaeffler Technologies AG & Co. KG Sliding cam system with a guided on an actuator device sliding block
WO2018147337A1 (en) * 2017-02-13 2018-08-16 本田技研工業株式会社 Variable valve device for internal combustion engine
JP6438987B2 (en) 2017-02-17 2018-12-19 本田技研工業株式会社 Variable valve gear
JP6617737B2 (en) * 2017-03-03 2019-12-11 トヨタ自動車株式会社 Internal combustion engine system
KR20200022039A (en) 2017-08-17 2020-03-02 바르실라 핀랜드 오이 Camshaft assembly for internal combustion piston engine and how to convert the internal combustion piston engine to operate in at least two operating modes
DE102017120145A1 (en) 2017-09-01 2019-03-07 Man Truck & Bus Ag Sliding cam system
KR20190070206A (en) 2017-12-12 2019-06-20 현대자동차주식회사 Variable valve device for engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230877A1 (en) * 1991-09-30 1993-04-01 Volkswagen Ag Control for lift valve with two cams - comprises cam block containing two cams which is axially displaceable but non rotatable peripherally on camshaft
EP0579592A1 (en) * 1992-07-13 1994-01-19 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Internal combustion engine comprising a camshaft with axial moving device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5129407A (en) * 1991-06-10 1992-07-14 J. D. Phillips Corporation Variable camshaft

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230877A1 (en) * 1991-09-30 1993-04-01 Volkswagen Ag Control for lift valve with two cams - comprises cam block containing two cams which is axially displaceable but non rotatable peripherally on camshaft
EP0579592A1 (en) * 1992-07-13 1994-01-19 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Internal combustion engine comprising a camshaft with axial moving device

Cited By (133)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19945340A1 (en) * 1999-09-22 2001-03-29 Schaeffler Waelzlager Ohg Valve gear for different strokes of gas change valve of internal combustion engine; has cam group of at least two cams on camshaft and cam follower with switch slider supported in grooves on camshaft
DE10054623A1 (en) * 2000-11-03 2002-05-08 Audi Ag Device for changeover of cam pack on camshaft to operate gas exchange valves has actuating element in form of pin movable radially outwards and in extended state interacting with slide tracks in guide section
DE10148177B4 (en) * 2001-09-28 2015-05-13 Schaeffler Technologies AG & Co. KG Valve train with valve lift switching for the gas exchange valves of a 4-stroke internal combustion engine
DE10148178A1 (en) * 2001-09-28 2003-04-17 Ina Schaeffler Kg Method for reduction of fuel consumption and exhaust emissions of 4-stroke IC engines with at least one cylinder being operated in 8-stroke method with three high-pressure loops suitable for ignition
DE10148179B4 (en) * 2001-09-28 2015-09-24 Schaeffler Technologies AG & Co. KG Valve train with valve lift switching for the gas exchange valves of a 4-stroke internal combustion engine
DE10349902A1 (en) * 2003-10-25 2005-06-23 Audi Ag Valve drive for an I.C. engine comprises a camshaft with a cam piece with cams having running surfaces
DE102004008670A1 (en) * 2004-02-21 2005-09-08 Ina-Schaeffler Kg Valve drive with cam switching for the gas exchange valves of a 4-stroke internal combustion engine
DE102004008670B4 (en) * 2004-02-21 2013-04-11 Schaeffler Technologies AG & Co. KG Valve drive with cam switching for the gas exchange valves of a 4-stroke internal combustion engine
US7404383B2 (en) 2004-02-21 2008-07-29 Schaeffler Kg Valve train with cam switching for the gas exchange valves of a four-cycle internal combustion engine
DE102004022849A1 (en) * 2004-05-08 2005-12-15 Audi Ag Valve drive for combustion engines comprises a camshaft on which a cam support is fixed
DE102004024219A1 (en) * 2004-05-15 2006-01-19 Audi Ag Valve train assembly for internal combustion engine, has cam support adjustably arranged to shift in axial direction as actuator is fitted into cam track, in which cam track is divided into segments indicating different functions
DE102004024219B4 (en) 2004-05-15 2019-01-31 Audi Ag Valve gear of an internal combustion engine
US7472671B2 (en) 2004-07-30 2009-01-06 Schaeffler Kg Valve engine
DE102004056290B4 (en) * 2004-11-22 2017-03-16 Audi Ag Valve gear of an internal combustion engine with at least one base camshaft
DE102005003079B4 (en) * 2005-01-22 2014-12-31 Audi Ag Internal combustion engine with a valve train
WO2008107111A1 (en) * 2007-03-02 2008-09-12 Audi Ag Valve drive for gas exchange valves of an internal combustion engine, comprising a movable cam support and a twin worm gear
DE102007010150A1 (en) * 2007-03-02 2008-09-04 Audi Ag Valve drive for gas exchange valves has locking device fixed in position in housing of internal combustion engine
DE102007010156A1 (en) * 2007-03-02 2008-09-04 Audi Ag Valve drive unit for a combustion engine comprises an adjusting unit having interacting elements which interact alternately with a curved connecting part
DE102007010149A1 (en) * 2007-03-02 2008-09-04 Audi Ag Automotive piston engine gas valve timer has right- and left-handed grooves are located immediately alongside and translating into each other
US8365692B2 (en) 2007-03-02 2013-02-05 Audi Ag Valve drive for gas exchange valves of an internal combustion engine, comprising a movable cam support and twin worm gear
DE102007024598A1 (en) 2007-05-25 2008-11-27 Schaeffler Kg Regulation device has housing and controllable holding and release device to hold actuator pin in retaining position and to release actuator pin from retaining position
DE102007024600A1 (en) 2007-05-25 2008-11-27 Schaeffler Kg Operating device for controlling stroke variable valve gear of internal combustion engine, has latching element stressing actuator pin supporting surface by force in extending direction of pin in operating position of pin
WO2009018991A1 (en) 2007-08-07 2009-02-12 Eto Magnetic Gmbh Device for camshaft adjustment in an internal combustion engine
DE102007037232A1 (en) 2007-08-07 2009-02-12 Eto Magnetic Gmbh Device for adjusting the camshaft of an internal combustion engine
RU2476692C2 (en) * 2007-08-07 2013-02-27 Это Магнетик Гмбх Device to adjust ice camshaft
US8186320B2 (en) 2007-08-07 2012-05-29 Eto Magnetic Gmbh Device for camshaft adjustment in an internal combustion engine
EP2636860A1 (en) 2007-08-07 2013-09-11 Eto Magnetic Gmbh Device for camshaft adjustment in an internal combustion engine
US8347837B2 (en) 2007-08-10 2013-01-08 Daimler Ag Internal combustion engine valve drive train switching arrangement
WO2009021669A1 (en) * 2007-08-10 2009-02-19 Daimler Ag Internal combustion engine valve train switching device
CN101779008B (en) * 2007-08-10 2013-09-11 戴姆勒股份公司 Internal combustion engine valve train switching device
WO2009030434A1 (en) * 2007-09-08 2009-03-12 Daimler Ag Internal combustion engine valve train switching device
US8307795B2 (en) 2007-09-08 2012-11-13 Daimler Ag Internal combustion engine valve drive train switching device
WO2009049801A1 (en) * 2007-10-12 2009-04-23 Daimler Ag Valve train devices
WO2009056221A1 (en) * 2007-11-02 2009-05-07 Daimler Ag Valve operating mechanism
DE102008020892A1 (en) 2008-04-25 2009-10-29 Schaeffler Kg Adjusting device for adjusting variable-lift valve drive of internal combustion engine, has controlling mechanism controllably transferring stop valve in retracting direction of actuating pin to release actuating pin from holding position
DE102008020893A1 (en) 2008-04-25 2009-10-29 Schaeffler Kg Electromagnetic adjusting device for controlling stroke-variable valve impulse of internal-combustion engine of motor vehicle, has diagnostic current circuit closed in one of positions by contact of armature with contact element
CN102066699A (en) * 2008-06-20 2011-05-18 戴姆勒股份公司 Valve train device
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WO2009152985A1 (en) * 2008-06-20 2009-12-23 Daimler Ag Valve train device
US8893674B2 (en) 2008-06-20 2014-11-25 Daimler Ag Valve drive train device
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WO2010091798A1 (en) * 2009-02-14 2010-08-19 Schaeffler Technologies Gmbh & Co. Kg Valve drive of an internal combustion engine
CN102282341A (en) * 2009-02-14 2011-12-14 谢夫勒科技有限两合公司 Valve drive of an internal combustion engine
US8584639B2 (en) 2009-02-14 2013-11-19 Schaeffler Technologies AG & Co. KG Valve drive of an internal combustion engine
CN102282341B (en) * 2009-02-14 2014-08-20 谢夫勒科技股份两合公司 Valve drive of an internal combustion engine
DE202009015466U1 (en) 2009-02-27 2010-03-18 Schaeffler Kg Electromagnetic actuator
DE102009010949A1 (en) 2009-02-27 2010-09-02 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuator
US8339225B2 (en) 2009-02-27 2012-12-25 Schaeffler Technologies AG & Co. KG Electromagnetic actuating device
WO2010097298A1 (en) 2009-02-27 2010-09-02 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuating device
DE102009015486A1 (en) 2009-03-28 2010-09-30 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuator comprises housing with electrically energized magnetic coil device, and magnetic coil device generates magnetic field, where stationary core area is commonly assigned to permanent magnets
DE102009016902A1 (en) 2009-04-08 2010-10-14 Schaeffler Technologies Gmbh & Co. Kg Cam shaft for stroke-variable actuation of gas exchange valves of four-cylinder four-valve engine, has cam pieces, where number of cam pieces is lesser than number of engine cylinders whose associated gas exchange valves operate shaft
DE202009015468U1 (en) 2009-06-25 2010-02-25 Schaeffler Kg Electromagnetic actuator
DE102009030375A1 (en) 2009-06-25 2010-12-30 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic control device has housing and actuator pins, which are displaced between retracted rest position in housing and working position extended from housing independent of each other
WO2011026545A3 (en) * 2009-09-01 2011-05-05 Eto Magnetic Gmbh Device for adjusting a camshaft of an internal combustion engine
CN102597435A (en) * 2009-09-01 2012-07-18 Eto电磁有限责任公司 Device for adjusting a camshaft of an internal combustion engine
US8707917B2 (en) 2009-09-01 2014-04-29 Eto Magnetic Gmbh Device for adjusting a camshaft of an internal combustion engine
WO2011026545A2 (en) 2009-09-01 2011-03-10 Eto Magnetic Gmbh Device for adjusting a camshaft of an internal combustion engine
DE202009011804U1 (en) 2009-09-01 2011-01-13 Eto Magnetic Gmbh Device for adjusting the camshaft of an internal combustion engine
DE102009053121A1 (en) 2009-11-13 2011-05-19 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuating device for controlling stroke-variable valve drive of internal-combustion engine, has locking pins subjected with force by magnetic circuit in electromagnet in extending direction for blocking latch
WO2011067142A1 (en) 2009-12-02 2011-06-09 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuating device
DE102009056609A1 (en) 2009-12-02 2011-06-09 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuator
DE102010007023A1 (en) 2010-01-29 2011-08-04 Dr. Ing. h.c. F. Porsche Aktiengesellschaft, 70435 Internal combustion engine, has cylinder in which combustion chamber is limited between piston and cylinder head, where valve lift at inlet valve is maintained in high load range and another valve lift at another inlet valve is adjustable
DE102010036899A1 (en) 2010-08-06 2012-02-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine
DE102011001124A1 (en) 2011-03-07 2012-09-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve train for optimizing load movement in combustion chamber of combustion engine, has link portion including two reconducting elements for pins, where pins are axially displaceable in radially outward direction by reconducting elements
DE102011001125A1 (en) 2011-03-07 2012-09-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve train for an internal combustion engine
US8567361B2 (en) 2011-03-07 2013-10-29 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve drive for an internal combustion engine
DE102011001123A1 (en) 2011-03-07 2012-09-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine has camshafts and sliding cam that are positioned in housing of another camshaft which is positioned between head cover and lower portion of cylinder
DE102011001288B4 (en) 2011-03-15 2019-03-21 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine
DE102011001288A1 (en) 2011-03-15 2012-09-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine has latching element with latching recesses that is supported in cylinder head or in cylinder head cover or in bearing unit of cam shaft
DE102011001625A1 (en) 2011-03-29 2012-10-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine has respective first latching element mounted in cylinder head or in cylinder head cover or in camshaft bearing device, such that sensor detects position of respective first latching element
DE102011001659A1 (en) 2011-03-30 2012-10-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve-train for optimizing load movement in combustion chamber of combustion engine, has two separated portions respectively formed on camshaft and cam for centering cam on camshaft and for transmission of torque from camshaft to cam
DE102011001660A1 (en) 2011-03-30 2012-10-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve drive for optimizing charge movement of combustion chamber of internal combustion engine, has centering section formed such that multiple centering projections are formed and distributed radially outside of camshaft over periphery
DE102011001661A1 (en) 2011-03-30 2012-10-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve train for internal combustion engine, has clearance portion that is formed axially between the centering section and torque transmitting portion
DE102011001661B4 (en) 2011-03-30 2019-03-21 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve train for an internal combustion engine
DE102011001711A1 (en) 2011-03-31 2012-10-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Valve train for internal combustion engine, has bearing sleeves fixed on side portions of sliding sleeve, and camshaft bearings axially displaceable with respect to bearing sleeves and rotatably mounted on camshaft
DE102011050484A1 (en) 2011-05-19 2012-11-22 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine, has locking elements co-operating together with actuators, and cylinder head cover integrally formed with cylinder head, where one of locking element is supported in cylinder head or cylinder head cover
DE102011076726A1 (en) 2011-05-30 2012-12-06 Schaeffler Technologies AG & Co. KG Valve train for combustion piston engine, has actuating device with rocker arm, which is arranged adjacent to control body in radial manner with axial alignment, where rocker arm is pivoted around tangential axis
US8701610B2 (en) 2011-08-23 2014-04-22 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine and valve drive for an internal combustion engine
KR101378623B1 (en) 2011-08-23 2014-03-26 독터. 인제니어. 하.체. 에프. 포르쉐 악티엔게젤샤프트 Internal combustion engine and valve drive for an internal combustion engine
CN103016085B (en) * 2011-08-23 2015-04-08 Dr.Ing.h.c.F.保时捷股份公司 Internal combustion engine and valve drive for an internal combustion engine
CN103016085A (en) * 2011-08-23 2013-04-03 Dr.Ing.h.c.F.保时捷股份公司 Internal combustion engine and valve drive for an internal combustion engine
DE102011052912A1 (en) 2011-08-23 2013-02-28 Dr.Ing.H.C.F.Porsche Aktiengesellschaft Internal combustion engine and valve train for an internal combustion engine
DE102011084043A1 (en) 2011-10-05 2013-04-11 Schaeffler Technologies AG & Co. KG Sliding cam system for reciprocating internal combustion engines, has sliding cams which are arranged on engine-fixed base shaft, where sliding cams have cams with cam lifting chart and base circle
DE102011054218A1 (en) 2011-10-06 2013-04-11 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine i.e. multi-cylinder internal combustion engine, has rotatably mounted camshaft operating gas shuttle valves of cylinders, and common actuator effectuating axial displacement of sliding cams arranged on camshaft
DE102012103751A1 (en) 2012-04-27 2013-10-31 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Combustion engine has sliding cam whose locking sleeve is provided in rest position of contour portion, and sliding cam which is axially displaced and engaged with sliding sleeve
DE102012103750A1 (en) 2012-04-27 2013-10-31 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Combustion engine has actuator whose movable pin is in operative position and not engaged in form-fitting of sliding sleeve
WO2013178405A1 (en) 2012-05-30 2013-12-05 Schaeffler Technologies AG & Co. KG Sliding cam element for reciprocating piston internal combustion engines
CN103726893A (en) * 2012-10-11 2014-04-16 Dr.Ing.h.c.F.保时捷股份公司 Sliding cam arrangement for variable actuating gas exchange valves of an internal combustion engine
DE102012111856A1 (en) 2012-12-06 2014-06-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine for use with valve drive, has axially displaceable locking slide that is positioned radially outward on respective sliding cam together with respective sliding cam
DE102012112482A1 (en) 2012-12-18 2014-06-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for operating internal combustion engine of motor vehicle, involves performing axial displacement of respective slide cam dependent on axial displacement direction and/or dependent on valve clearance outside of cam base circle
DE102012112795A1 (en) 2012-12-20 2014-06-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine i.e. three cylinder internal combustion engine with valve drive, has sliding blocks mounted with rotation on displaceable pull rod and cooperate with segments
DE102013220554A1 (en) * 2013-10-11 2015-04-16 Schaeffler Technologies AG & Co. KG Hubvariabler valve drive of an internal combustion engine
DE102013220554B4 (en) * 2013-10-11 2015-05-13 Schaeffler Technologies AG & Co. KG Hubvariabler valve drive of an internal combustion engine
WO2015086157A1 (en) 2013-12-13 2015-06-18 Thyssenkrupp Presta Teccenter Ag Adjustable camshaft
DE102013114021A1 (en) 2013-12-13 2015-06-18 Thyssenkrupp Presta Teccenter Ag adjustable camshaft
DE102014008156A1 (en) 2014-05-30 2015-12-03 Daimler Ag Valve train for an internal combustion engine
DE102014108927A1 (en) 2014-06-25 2015-12-31 Eto Magnetic Gmbh Device for adjusting the camshaft of an internal combustion engine
WO2015197777A1 (en) 2014-06-25 2015-12-30 Eto Magnetic Gmbh Device for adjusting a camshaft of an internal combustion engine
DE102014213249A1 (en) 2014-07-08 2016-01-14 Schaeffler Technologies AG & Co. KG Actuator unit with heating element
DE102015200539A1 (en) 2015-01-15 2016-07-21 Schaeffler Technologies AG & Co. KG Actuator unit with heating element
DE102015105735A1 (en) 2015-04-15 2016-10-20 Volkswagen Aktiengesellschaft Method for operating a fuel pump for an internal combustion engine, fuel pump and internal combustion engine
DE102015011907A1 (en) 2015-09-11 2016-04-07 Daimler Ag Valve train device, in particular for an internal combustion engine
DE102015012044A1 (en) 2015-09-15 2017-03-16 Daimler Ag Valve train device, in particular for an internal combustion engine
US10697330B2 (en) 2015-11-03 2020-06-30 Daimler Ag Valve train device
DE102015014175A1 (en) 2015-11-03 2017-05-04 Daimler Ag Valve drive device
DE102016200325A1 (en) 2016-01-14 2017-07-20 Bayerische Motoren Werke Aktiengesellschaft Valve train for an internal combustion engine
EP3196429A1 (en) 2016-01-14 2017-07-26 Bayerische Motoren Werke Aktiengesellschaft Valve drive for a combustion engine
DE102016012048A1 (en) 2016-10-07 2018-04-12 Promescon Gmbh Sliding cam valve drive for variable-stroke actuation of the gas exchange valves of an internal combustion engine
DE102016012197A1 (en) 2016-10-12 2018-04-12 Daimler Ag Valve drive device
WO2018068875A1 (en) 2016-10-12 2018-04-19 Daimler Ag Valve train device
DE102016220612A1 (en) * 2016-10-20 2018-04-26 Mahle International Gmbh Valve train for an internal combustion engine
DE102016012965A1 (en) 2016-10-29 2018-05-03 Daimler Ag Valve drive device
WO2018077452A1 (en) 2016-10-29 2018-05-03 Daimler Ag Valve train device
WO2018077451A1 (en) 2016-10-29 2018-05-03 Daimler Ag Valve train device
DE102016012967A1 (en) 2016-10-29 2018-05-03 Daimler Ag Valve drive device
DE102016120815A1 (en) 2016-11-02 2018-05-03 Volkswagen Aktiengesellschaft Internal combustion engine
DE102016225049A1 (en) 2016-12-14 2018-06-14 Volkswagen Aktiengesellschaft Variable valve train for an internal combustion engine
DE102017104845B4 (en) 2017-03-08 2018-09-20 Schaeffler Technologies AG & Co. KG Internal combustion engine with variable-displacement gas exchange valve actuation
DE102017104845A1 (en) 2017-03-08 2018-09-13 Schaeffler Technologies AG & Co. KG Internal combustion engine with variable-displacement gas exchange valve actuation
DE102017003789A1 (en) 2017-04-20 2018-10-25 Daimler Ag Valve train device, in particular for an internal combustion engine
DE102017004387A1 (en) 2017-05-06 2017-11-02 Daimler Ag Valve train for an internal combustion engine of a motor vehicle, in particular a motor vehicle
DE102017207917A1 (en) * 2017-05-10 2018-11-15 Volkswagen Aktiengesellschaft Device for influencing the flow of a reaction gas in the combustion chamber of an internal combustion engine
US20180334933A1 (en) * 2017-05-16 2018-11-22 Hyundai Motor Company Multiple variable valve lift apparatus
US10436080B2 (en) * 2017-05-16 2019-10-08 Hyundai Motor Company Multiple variable valve lift apparatus
DE102017114575A1 (en) 2017-06-29 2019-01-03 Man Truck & Bus Ag Variable valve train
DE102017116820A1 (en) 2017-07-25 2019-01-31 Man Truck & Bus Ag Sliding cam system
US10648372B2 (en) 2017-07-25 2020-05-12 Man Truck & Bus Ag Sliding cam system
US10612434B2 (en) 2017-07-27 2020-04-07 Man Truck & Bus Ag Sliding cam system and method for operating an internal combustion engine
DE102017116987A1 (en) 2017-07-27 2019-01-31 Man Truck & Bus Ag Sliding cam system and method for operating an internal combustion engine
WO2019037943A1 (en) 2017-08-24 2019-02-28 Bayerische Motoren Werke Aktiengesellschaft Valve drive for an internal combustion engine
DE102017214794A1 (en) 2017-08-24 2019-02-28 Bayerische Motoren Werke Aktiengesellschaft Valve train for an internal combustion engine
DE102018205730A1 (en) * 2018-04-16 2019-10-17 Mahle International Gmbh Rocker arm assembly and a valvetrain
US10662832B2 (en) 2018-05-04 2020-05-26 Man Truck & Bus Se Variable valve drive

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JPH108928A (en) 1998-01-13
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KR100416895B1 (en) 2004-03-31
JP3980699B2 (en) 2007-09-26
KR970065972A (en) 1997-10-13

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