DE102007022266A1 - Fully-variable valve operating device for stroke setting of charge-cycle valve of internal combustion engine, has camshaft with cam and transmission device is arranged between one of charge-cycle valve and camshaft for stroke setting - Google Patents

Abstract

The fully-variable valve operating device (1) has a camshaft (3) with a cam and a transmission device (4) is arranged between one of a charge-cycle valve (2) and the camshaft for stroke setting of the charge-cycle valve in dependence of a position of the transmission device. The transmission device has a locking device connected in non-positive manner on an axis (5) laterally arranged on a component in a rotating direction of the locking device. The axis hinders an axially parallel slide of the component in a rotating direction of the locking device. An independent claim is also included for a method for manufacturing a fully-variable valve operating device.

Description

The The present invention relates to a fully variable valve train, Also as a valve lift for stroke adjustment of gas exchange valves known, an internal combustion engine with at least one Cam having camshaft and at least one between at least one of the gas exchange valves and the camshaft arranged transmission device for adjusting the stroke of the gas exchange valve in dependence a relative position of the transmission device, wherein the transmission device at least one elongated axis and at least one on comprises this component arranged axis. The valve train is through his Arrangement able, as independent of tolerance the gas exchange valve opening times and the gas exchange valve opening width, ideally for each piston separately, adjust too can.

Such valve lifting devices are known in various embodiments of the transmission device. For example, the DE 42 23 173 A1 (Applicant: Bayerische Motoren Werke AG, filing date: 15.7.1992) a transmission device formed from a roller and a link element. In the DE 43 26 331 A1 (Applicant: Bayerische Motoren Werke AG, filing date: 5.8.1993), the transmission device consists of a drag lever arranged on one axle and a rocker arm. Also in the transmission devices in the patent applications DE 103 14 683 A1 (Applicant: Gerlinde Bösl-Flierl, filing date: 29.3.2003) and DE 103 23 665 A1 (Applicant: Hydraulik-Ring GmbH, filing date: May 14, 2003) disclosed valve lifting devices are arranged on axes and operated by the cam lever, so-called intermediate or rocker arms provided. Like in the DE 103 14 683 A1 explained, the intermediate lever is mounted on a central axis. Since internal combustion engines often have at least two gas exchange valves for the inlet per combustion chamber and also at least two gas exchange valves for the outlet, the drag, intermediate or rocker arms mounted rotatably on the axle are generally designed as double levers or fork levers. For completeness reasons, as a variable valve train can also be designed, are still the embodiments of the two publications DE 10 2005 010 182 A1 (Applicant: entec Consulting GmbH, filing date: 03.03.2005) and DE 100 33 437 A1 (Applicant: Unisia Jecs Corporation, priority date: 08.07.1999).

Out For better clarity, the Scope of disclosure of the cited protective rights by these references with regard to the component representations in full present patent application included to the general construction variants represent a fully variable valve train. The ones used here Components and elements can be constructed with the present invention.

Especially at high speeds of the internal combustion engine, such as in high-revving gasoline engines, tend to be stored on an axle Components of the transmission device to laterally to move along the axis. If this move the Components is not counteracted, there is a risk of malfunction of the engine to serious damage of the same.

From the DE 27 35 100 C2 (Applicant: Bayerische Motoren Werke AG, filing date: 4 January 1977), an axial thrust securing arrangement is now known with which an axial movement of a valve actuating lever is to be prevented. The fuse arrangement is positively applied on the axis. For this purpose, a radial groove is provided on the axle, in which engages the clamp-shaped securing arrangement with a fork-shaped end portion. The valve actuating lever is encompassed on both sides by the securing arrangement and thereby prevented from axial movement in both axial directions. Due to the two-sided gripping claimed this arrangement relatively much space, which is in principle scarce in internal combustion engines. In addition, only a component arranged on the axle can be secured against lateral displacement with this safety arrangement.

About that In addition, within a groove of the axis recorded Seegeringe as a backup of on-axis components against axial Shifts known.

task

developer a fully variable valve train, in particular a selected To design a system so that it is industrially manufacturable, see each other faced with the different demands. on the one Pages should make the production steps as easy as possible be feasible on the other side the manufacturing steps do not exceed certain tolerances. If components subject to tolerances are lined up on a common axis, then Add up the individual tolerances and the total tolerance may outside an acceptable range. In such a Case is the reject rate of industrial manufacturing outside one acceptable quality. To make matters worse, that the driving Components for the gas exchange valves a wide temperature range must be able to cover.

The Internal combustion engine must be able to run at ambient temperature be within a very short time exceeds the Temperature in the cylinder head 150 ° C. Thus, a constructive Realization to choose a temperature increase of more than 200 ° C can handle.

Farther the variable valve train should be designed so that even high-revving Gasoline engines are equipped with such a valvetrain that means Crankshaft revolutions of 8,000 revolutions per minute or even more should be achievable. At speeds of 8,000 revolutions or even 10,000 revolutions per minute should be constructive Solution should be as weight-saving as possible. As known, is the or the intermediate lever, one or more intermediate sleeves or threaded a link intermediate bearing on a common axis. The bearing axis should ideally be a hollow part to the involved Reduce masses. The axle is also industrially manufactured to design. This in turn means that the axis also increases the tolerance contributes.

It So a constructive solution is sought, which is the individual on the axis to be stored components against lateral displacement can secure.

General description of the invention

These Task is by a variable Ventilhubvorrichtung with the features of claim 1 solved. Preferred embodiments are the subject of the dependent claims.

at the fully variable valve drive device according to the invention is a frictional or by means of a press fit with provided the axis connected fuse element. Thus, you can Steps to produce a known positive connection between the fuse element and the axle are necessary, such as for example, making a radial groove on the axle for a positive connection with the known fuse arrangement, saved become. When assembling the fully variable valve train device the fuse element can be easily and without further processing attach the axle to this. The preparation of the invention Fully variable valve train device is thus easier, faster and more cost effective than the manufacture of known valve lift devices. Furthermore, the securing element claimed in the present invention less space than the known fuse arrangement, as it is the case Securing component does not surround on both sides, but only on one single side of the same is arranged. It can be at the Fully variable valve drive device according to the invention also two or more arranged on the axis components with only one single fuse element against displacement in a fuse element Secure facing direction. Unlike the known fuse arrangement it is no longer necessary for each component to be secured to provide a respective fuse element, thereby increasing the manufacturing cost and the space requirements, but especially of the security elements space occupied on the axle, reduce once again. Of course It is possible depending on the need, even several security elements provided. For example, two can be opposite Provided end portions of the axis arranged fuse elements be to move the components in both axial directions to prevent. In this case, the fuse element in either direct Contact with the component, or it may start from this be spaced. To the fuse element spaced from the component can assemble when assembling the fully variable valve drive device be provided that before attaching the securing element a Game spring final of the last component before the fuse element is brought to the axle to after the attachment of the fuse element to be taken out again and removed.

The Obstacles in the sense of this invention is characterized by a limitation or preventing the axial advancement of the threaded ones Components off.

fully variable Valve drive in the sense of this invention are such valve trains, which change the gas exchange valves in two ways can, especially in terms of the opening width and the opening time of a gas exchange valve for a combustion chamber of an internal combustion engine. In these arrangements are usually higher mechanical forces exerted on the valve lift, as in pure valve lift changing devices. Ideally, fully variable valve trains can be used in both Reference to opening width as well as in terms of opening duration be set as independently as possible.

The securing element is free within at least one section of the axle formed for the frictional engagement, in particular stepless, positionable. In principle, the axle can have only such a section, but it can also have a plurality of separate sections of this type. Several suitable for the frictional engagement with the securing element portions can then be provided if the axis must have sections with different diameters for functional reasons within the transmission device, and it is also possible to arrange each different security elements on portions of the axis with different diameters. In the simplest case, the frictional engagement with the However, fuse element along the entire length of the axis possible, in particular because the axis is provided with a constant diameter or the same strength. The securing element may be a cut piece of a spring steel wire spiral.

The solution according to the invention shows, inter alia the advantage that the penetration depth into the axis, to create a shim recess, reduced or omitted altogether can be. The axial circlip can after threading the individual components are easily applied. Due to the free positioning the axial retaining ring within a placement space on the Axis, the side of the next component, can tolerances Arrange components next to each other. When assembling can also be provided be that before attaching the axial circlip a play spring finally the last component before the axial circlip is brought to the shaft to after the attachment of the axial Circlip removed again and removed. In In this case, the axial securing ring is arranged at a distance. This means that the axial circlip is infinitely adjustable.

Out the circumstance of the free positioning of the fuse element results as a further advantage the possibility of tolerance adjustment by means of the same. Due to the manufacturing process, they are arranged on the axis Namely components with certain tolerances. Become tolerance-related components lined up on a common axis, so the individual tolerances add up to a total tolerance, which, however, do not exceed a certain range may, for. B. 1 to 2 tenths of a millimeter. To compensate for these tolerances is customary according to a method to measure the tolerances and a necessary tolerance by arranging different set thick shims on the axis. Another Possibility exists, each of different lengths Axes depending on the actual tolerance to use. As axial securing of the arranged on the axis shims becomes a person sitting in a groove of the axle according to the above method Seegering used. In the fully variable invention Valve train device tolerances, however, can be easily and conveniently by appropriate positioning of the securing element on a Set the position of the axis at which the manufacturing tolerances compensates for the components arranged on the axle. Thus can be the frictionally engaged with the axis fuse element both to secure the components against lateral Use shift as well as to set a necessary Tolerance. Because the fuse element performs both functions, can in the fully variable valve drive device according to the invention both on shims of suitable thickness, after measuring the actual tolerance of the applied to the axle Components with the required thickness possibly only must be made, as well as on the Seegering and the necessary groove for this are omitted. At a preferred embodiment of the invention is therefore the Securing element arranged at a location of the axis on which it Manufacturing tolerances of the component alone or of the component as well compensates for at least one further arranged on the axis component.

All In general, the fuse element can be a closed or a have open shape. For example, the fuse element in the first case be annular while in the second case is of a broken ring shape. Furthermore, the securing element basically have any cross section, such as for example, a triangular or hexagonal cross-section. Prefers However, the fuse element has a simple cross section on, that means a rectangular, which is also square can, or a round cross-section. The reason is in that a fuse element with rectangular or round Cross section particularly easy from usually easily available Produce blanks. So can a ring-shaped Locking element with rectangular cross section simply from a plate part be punched out while an open annular Securing element with round cross section by bending a comfortable elongated wire material in the right shape leaves.

Especially in a fuse element having a round cross section a line contact of the fuse element with the Axis. However, the securing element preferably has a planar Contact with the axle, to surface pressures occurring low on the frictional connection. Around in a fuse element with a round cross section such Therefore, it can be obtained flat contact with the axis be advantageous to deviate from the ideal circular cross-section, by making the cross section flattened towards the axis.

In a preferred embodiment, the securing element has at least two discrete contact areas in which it is in contact with the axis. These are particularly preferably distributed approximately uniformly around the circumference of the axis. To realize such discrete contact areas or multi-point contacts with the axis, the securing element deviates from the round circular shape. Preferred is an embodiment with three contact areas, which are therefore distributed by about 120 ° (with a deviation of a few degrees) about the axis. In a circular, beyond open, in particular annular, securing element prevents this a possible Kippelbewegung when z. B. the shape of the ring or the axis differs due to tolerances of the ideal circle.

In Internal combustion engines need driving components for the gas exchange valves a wide temperature range cover: On the one hand, an internal combustion engine must be at ambient temperature on the other hand, exceeds the Temperature in the cylinder head within a very short time 150 ° C. Thus, constructive realizations of the components are advantageous which process a temperature increase of more than 200 ° C can. For this reason, an execution the invention is preferred in which the axis and the securing element made of materials with essentially the same coefficients of thermal expansion are made. This will be a substantially equal strength Thermal expansion ensured by securing element and axle, without adversely affecting the frictional engagement between the two. Particularly preferred axis and securing element are made of the same Material prepared so that both have the same coefficient of thermal expansion.

The Securing element can be made of spring steel, for example, which is usually available as a round material, while the axis can be made of a hardened metal.

by virtue of the frictional engagement with the axis and the associated bias the fuse element can in the fully variable invention Valve drive device a stripping force for the fuse element be set. The stripping force is advantageously so chosen that possible occurring shear forces not to a falling apart of the axis and the fuse element being able to lead. Preferably, the stripping force has a lower limit. The lower limit of the stripping force is for the fuse element according to one embodiment at least 250 N. According to another embodiment, it can be at least 350 N or even at least 500 N. Here is the Abstreifkraft particularly preferred in the range between 250 N and 350 N. However, very particular preference is a stripping force of 300 N, which is more common for valve lifts Internal combustion engines has proved sufficient. To the limit the stripping force is the diameter and stability the axis. At the same time, however, the easily install and remove fully variable valve train device.

at The component arranged on the axis can basically to trade any component. Depending on the embodiment the transmission device, the component can be different be. However, fully variable valve train devices are particularly preferred with a transmission device, one of the cam operated intermediate, swivel or rocker arm, in particular a double or fork lever, an intermediate sleeve, a, guided along a backdrop, Kulussenzwischenlager and tension springs, so that it is at least one Component is one or more of these parts.

It is desirable, even high-revving gasoline engines with a Fully variable valve drive device according to the invention to be able to provide. Because such engines crankshaft revolutions from 8,000 revolutions per minute to 10,000 revolutions per minute or more, it is beneficial when the mass of the Reduce valve lift. That's why it is preferably a hollow axis in the axis. advantageously, is such an axle from a cut pipe as a blank manufactured. As in the fully variable invention Valve drive device no grooves or other recesses the axis for the connection of the fuse element with The axis is more necessary, the wall thickness of the axis be chosen much thinner than hollow Axes known fully variable valve train devices, thereby in the fully variable valve drive device according to the invention In addition, many times more saves on mass.

Internal Combustion Engines typically have multiple cylinders, so it's an advantage if for each cylinder a fully variable valve drive device is provided according to the present invention. The internal combustion engine preferably finds in a motor vehicle their use.

The Invention promotes the manufacturability of a fully variable Valve train. The axis, which ideally diverges from one Pipe is made as a blank is, according to one embodiment hardened metal. Because no further puncture in the pipe can carry out the wall thickness of the pipe or the camp are very thin. In the Manufacturing saves you another job because the production the puncture is omitted. So the axle only needs to be cut to length and be sharpened from the outside without a center.

With the blank as one of the first manufacturing steps, a method for producing a fully variable valve drive device can be carried out, comprising the following steps: first a cutting of a round, in particular a hardened hollow tube, preferably the Rundling over a resulting from the threading components length the cropping out, then pushing on at least one on the Rundling to be stored component, preferably at least three components and then the axial securing of the or to be supported component by a securing element. The length of the cut-to-length blank representing the axis is determined by the width of the components to be threaded, plus a maximum expected width tolerance, with a small additional width. Thus, one can always work with the same axis length.

The Securing element contactor against axial falling apart components, even in production, when the valve train unit, the transfer unit, weiterzutransportieren to a cylinder head is.

To In another aspect, an embodiment may be selected which is free of spacers. The spacers must no longer between fuse element and the next Component are arranged on the axis to compensate for tolerances. It eliminates the spacer clearance a complex Measuring, mounting and holding spacer rings of different kinds Size.

figure description

following the invention is based on embodiments below Reference to drawings explained in more detail. It demonstrate:

1 a perspective view of a fully variable valve drive device;

2 a perspective view of a transmission device of the fully variable valve drive device 1 ;

3a a cross section through a closed annular securing element with square cross-section;

3b a plan view of the securing element of 3a ;

4 a plan view of an open annular securing element;

5 an on-axis open fuse element having three contact areas; and

6 a schematic representation of a fully variable valve train, which includes a fork lever.

A fully variable valve train device 1 for the stroke adjustment of two gas exchange valves 2 an internal combustion engine is in 1 shown in perspective view. The fully variable valve drive device 1 essentially has a camshaft 3 with cams, which are not visible in the figure, as well as a registration device 4 on, wherein the transmission device 4 two on one axis 5 arranged intermediate lever 6 and an intermediate sleeve 7 includes. The intermediate sleeve 7 is designed to roll on a backdrop. The intermediate sleeve 7 serves as a spacer sleeve between the two intermediate levers 6 , One each of the intermediate levers 6 is doing a gas exchange valve 2 assigned. Furthermore, the fully variable valve drive device comprises an adjusting shaft, as the eccentric shaft 8th with eccentrics 9 and 10 can be executed.

As a result of a rotation of the camshaft a variable cam lift is effected, which acts via the cam on the intermediate lever. As a result, the running in a backdrop intermediate lever 6 pressed, in turn, on the respective gas exchange valves 2 act and thereby the stroke of the gas exchange valves 2 depending on the cam lift effect. The stroke length and the stroke time of the gas exchange valves 2 can be achieved by turning the eccentric shaft 8th to adjust.

In the 2 is the transmission device 4 shown in a perspective view. The two are on the axis 5 arranged intermediate lever 6 as well as the intermediate sleeve 7 between the two intermediate levers 6 also on the axis 5 is arranged. The axis 5 is designed as a hollow shaft and made of a hardened metal.

In addition, at both end portions of the axle 5 respective fuse elements 11 in the form of clamping rings that frictionally engage with the axle 5 are connected. The security elements 11 are free and in particular stepless on different positions on the axle 5 positionable. As a result of strong frictional connection with the axle 5 prevent the security elements 11 that the rocker arms 6 and the intermediate sleeve 7 during operation of the fully variable valve drive device 1 laterally on the axle 5 move and thereby from the axis 5 to solve. Here are the security elements 11 positioned so as to add up by summing up manufacturing tolerances of the two intermediate levers 6 and the intermediate sleeve 7 adjust or compensate the resulting total tolerance to a desired tolerance.

A simpler embodiment of a fuse element 11 is in the 3a and 3b shown, where 3a the cross section and 3b the top view of one of the fuse elements 11 shows. Like in the 3a can be seen, the fuse element has 11 a square cross section. From the 3b it is apparent that it at the fuse element 11 around an annular, more precisely, to a closed annular securing element 11 is. The fuse element 11 has a passage in the middle 12 in the fully assembled state of the fully variable valve drive device 1 from the axis 5 by ranges. The in this passage 12 located inner surface 13 of the fuse element 11 forms a contiguous contact area with which the fuse element 11 in the fully assembled state of the fully variable valve drive device 1 on the outer surface of the axle 5 rests and with this to bring about the frictional engagement between the axis 5 and the fuse element 11 is in contact with each other.

4 shows another embodiment for a fuse element 14 , although like the fuse element described above 11 is annular, but one of its central passage 15 outgoing and down to the outside 16 of the fuse element 14 extending radial gap 17 having. Because of this gap 17 this is the backup element 14 around an open annular securing element 14 or an open clamping ring. As with the fuse element described above 11 of the 3a and 3b the frictional engagement of the securing element takes place 14 with the axis 5 with his in the passage 15 located inner surface 18 , The fuse element 14 is made of a round wire spring wire or spring steel available.

Another example of an open security element 19 is in the 5 shown. The open security element 19 differs from the open annular securing element 14 of the 4 on the one hand by a much larger gap 20 , on the other hand gives way to the fuse element 19 from the ideal circular shape, thereby preventing its passage 21 still the inner surface 22 of the fuse element 19 of circular geometry. Im on the axis 5 mounted state of the fuse element 19 arise for this reason in each case three spaced contact areas 23 . 24 . 25 in which the inner surface 22 for producing a respective frictional engagement in contact with the axle 5 is. These contact areas 23 . 24 . 25 are even around the circumference of the axis 5 each distributed at an angle of about 120 ° (with a deviation of a few degrees) between two adjacent contact areas 23 . 24 . 25 , This particular embodiment of the fuse element 19 prevents a circular open open clamping ring possible Kippelbewegung when z. B. tolerances due to the shape of the ring or the axis 5 deviates from the ideal circle.

• – zwei geschlossene Klemmringe 111a, 111b,
• – zwei Zwischenhebel 6a, 6b mit zwei nadelgelagerten äußeren Lagerringen 159a, 159b,
• – zwei Distanzhülsen 150a, 150b und
• – ein nadelgelagerter mittiger Lagerring 151

aufgeschoben sind. 6 shows a schematic representation of a fully variable valve train 100 , This is a gas exchange valve 102 an internal combustion engine by means of a rocker arm 101 pressed or pressed in the open position, whereas a force-opposing valve spring 103 the gas exchange valve 102 in the closed position presses. The rocker arm 101 is about a geometric pivot axis 134 pivotable, which by means of a hydraulic valve clearance compensation 135 is movable within limits. As a result of the valve clearance compensation 135 ensures that the rocker arm 101 on the one hand at an upper ram end 136 of the gas exchange valve 102 on the other hand on a two-dimensional working curve 137 a lever rests as an intermediate lever 6a is executed. This intermediate lever 6a is together with a second intermediate lever 6b belonging to a structural unit that acts as a fork lever 139 is designated and in the 2 is shown in more detail. The fork lever 139 has four line contacts 140 . 141 . 142 . 143 over other components, so that also the position of the fork lever 139 by the displacement of the line contacts 140 . 141 . 142 . 143 is changeable. The line contacts 140 . 141 . 142 . 143 are doing with a housing-fixed backdrop 144 , an eccentric shaft 108 , a camshaft 3 and the rocker arm 101 educated. The fork lever 139 has a fork shaft axis designed as a hollow shaft 105 on, seen on both sides from axially outside to the axial center,

• - two closed clamping rings 111 . 111b .
• - two intermediate levers 6a . 6b with two needle-bearing outer bearing rings 159a . 159b .
• - two spacers 150a . 150b and
• - A needle-bearing central bearing ring 151

are deferred.

• – der mittiger Lagerring 151,
• – dessen lose Nadelwälzkörper,
• – die beiden Distanzhülsen 150a, 150b und
• – die beiden Zwischenhebel 6a, 6b mit den äußeren Lagerringen 159a, 159b und deren Nadelwälzkörpern

auf die Gabelhebelachse 5 aufgesteckt sind, werden beiderseits die zwei Klemmringe 111a, 111b aufgepresst. Dabei ist zwischen den Klemmringen 111a, 111b und der Gabelhebelachse 105 eine Presspassung vorgesehen, die einen Kraftschluss bildet. Die Innendurchmesser der Klemmringe 111a, 111b können dazu beispielsweise gehont oder feingedreht werden.Each of the two identically designed intermediate levers 6a . 6b points in the area of a bore, in which the fork lever axis 5 is included, a recess 30a respectively. 30b on. This divides the recess 30a respectively. 30b the intermediate lever 6a respectively. 6b in two receiving lugs, between which the outer bearing ring 159a respectively. 159b is included. Because the intermediate lever 6a respectively. 6b is almost rigid, forms between the outer bearing ring 159a respectively. 159b and the receiving lugs of the intermediate lever 6a respectively. 6b an axial clearance that is not affected by the assembly described below. After this

• - the central bearing ring 151 .
• - whose loose Nadelwälzkörper,
• - the two spacers 150a . 150b and
• - the two intermediate levers 6a . 6b with the outer bearing rings 159a . 159b and their Nadelwälzkörpern

on the fork lever axle 5 are plugged on both sides of the two clamping rings 111 . 111b pressed. It is between the clamping rings 111 . 111b and the fork lever axis 105 provided a press fit, which forms a frictional connection. The Inner diameter of the clamping rings 111 . 111b For example, they can be honed or finely turned.

Of the The fork lever does not have to be equipped with clamping rings on both sides. It can also unilaterally provided a different support be because one side a clamping ring sufficient for tolerance compensation. The Support can also by means of a paragraph of the fork lever axis or a circlip in an annular groove can be realized. Alternatively, it also offers, one-sided screw stops in the sense of nuts with internal threads.

Further, in particular features not described belonging to the invention Device parts are the geometries shown in the drawings to remove the device parts.

1

fully variable Valve drive device

2

Gas exchange valve

3

camshaft

4

transmission equipment

5

axis

6

intermediate lever

6a

intermediate lever

6b

intermediate lever

7

intermediate sleeve

8th

eccentric shaft

9

eccentric

10

eccentric

11

fuse element

12

passage

13

palm

14

fuse element

15

passage

16

outer surface

17

gap

18

palm

19

fuse element

20

gap

21

passage

22

palm

23

contact area

24

contact area

25

contact area

30a

first recess

30b

second recess

100

valve train

101

rocker arm

102

Gas exchange valve

103

valve spring

105

Fork lever axis

108

eccentric shaft

111

clamping ring

111b

clamping ring

134

swivel axis

135

Valve lash adjustment

136

plunger end

137

working curve

139

fork lever

140

line Contact

141

line Contact

142

line Contact

143

line Contact

144

scenery

150a

Stand Off

150b

Stand Off

151

bearing ring

159a

outer bearing ring

159b

outer bearing ring

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4223173 A1 [0002]
• - DE 4326331 A1 [0002]
• - DE 10314683 A1 [0002, 0002]
• - DE 10323665 A1 [0002]
• - DE 102005010182 A1 [0002]
• - DE 10033437 A1 [0002]
• - DE 2735100 C2 [0005]

Claims (22)

Fully variable valve train device ( 1 ) for the stroke adjustment of gas exchange valves ( 2 ) an internal combustion engine with a cam having at least one cam ( 3 ) and at least one between at least one of the gas exchange valves ( 2 ) and the camshaft ( 3 ) arranged transmission device ( 4 . 139 . 144 . 101 ) for adjusting at least the stroke of the gas exchange valve ( 2 ) depending on a position of the transmission device ( 4 . 139 . 144 . 101 ), the transmission device ( 4 . 139 . 144 . 101 ) at least one elongated axis ( 5 . 105 ) and at least one on this axis ( 5 . 105 ) arranged component ( 6 . 6a . 6b . 7 . 139 . 150a . 150b . 159a . 159b ), characterized in that the transmission device ( 4 . 139 . 144 . 101 ) at least one on the axis ( 5 . 105 ) on the side of the component ( 6 . 6a . 6b . 7 . 139 . 150a . 150b . 159a . 159b ) and with the axis ( 5 . 105 ) frictionally connected securing element ( 11 . 14 . 19 . 111 . 111b ), which an axis-parallel displacement of the component ( 6 . 6a . 6b . 7 . 139 . 150a . 150b . 159a . 159b ) in a fuse element ( 11 . 14 . 19 . 111 . 111b ) prevents facing direction. Fully variable valve train device ( 1 ) according to claim 1, characterized in that the securing element ( 11 . 14 . 19 . 111 . 111b ) within at least one section of the axle formed for frictional engagement ( 5 . 105 ) is freely positionable. Fully variable valve train device ( 1 ) according to claim 1 or 2, characterized in that the securing element ( 11 . 14 . 19 . 111 . 111b ) at one location of the axis ( 5 . 105 ) at which there are manufacturing tolerances of the component ( 6 . 6a . 6b . 7 . 139 . 150a . 150b . 159A . 159b ) alone or the component ( 6 . 6a . 6b . 7 . 139 . 150a . 150b . 159a . 159b ) and at least one other on the axis ( 5 . 105 ) arranged component ( 6 . 6a . 6b . 7 . 150a . 150b . 159a . 159b ) compensates. Fully variable valve train device ( 1 ) according to one of the preceding claims, characterized in that the securing element ( 11 . 111 . 111b ) has a closed shape. Fully variable valve train device ( 1 ) according to one of claims 1 to 3, characterized in that the securing element ( 14 . 19 ) has an open shape. Fully variable valve train device ( 1 ) according to one of the preceding claims, characterized in that the securing element ( 11 . 14 . 19 . 111 . 111b ) has a rectangular or a round cross-section. Fully variable valve train device ( 1 ) according to one of the preceding claims, characterized in that the securing element ( 11 . 14 . 19 . 111 . 111b ) a surface contact with the axis ( 5 . 105 ) Has. Fully variable valve train device ( 1 ) according to one of the preceding claims, characterized in that the securing element ( 19 ) at least two, but in particular three discrete contact areas ( 23 . 24 . 25 ) in which it is in contact with the axis ( 5 ). Fully variable valve train device ( 1 ) according to claim 8, characterized by evenly around the circumference of the axis ( 5 ) distributed contact areas ( 23 . 24 . 25 ). Fully variable valve train device ( 1 ) according to one of the preceding claims, characterized in that the axis ( 5 . 105 ) and the security element ( 11 . 14 . 19 . 111 . 111b ) are made of materials having substantially the same coefficients of thermal expansion. Fully variable valve train device ( 1 ) according to claim 10, characterized in that axis ( 5 . 105 ) and fuse element ( 11 . 14 . 19 . 111 . 111b ) are made of the same material. Fully variable valve train device ( 1 ) according to one of claims 1 to 11, characterized in that the securing element ( 11 . 14 . 19 . 111 . 111b ) is made of spring steel. Fully variable valve train device ( 1 ) according to one of claims 1 to 11, characterized in that the axis ( 5 . 105 ) is made of a hardened metal. Fully variable valve train device ( 1 ) according to one of the preceding claims, characterized in that a stripping force for the securing element ( 11 . 14 . 19 . 111 . 111b ) is at least 250 N, preferably either at least 350 N or at least 500 N. Fully variable valve train device ( 1 ) according to claim 14, characterized in that the stripping force is in the range between 250 N and 350 N. Fully variable valve train device ( 1 ) according to claim 15, characterized in that the stripping force is 300 N. Fully variable valve train device ( 1 ) according to one of the preceding claims, characterized in that the component ( 6 . 6a . 6b . 7 . 139 . 150a . 150b . 159a . 159b ) actuated by the cam Intermediate or rocker arm ( 6 . 6a . 6b . 111 . 111b . 139 ), in particular a double or fork lever ( 139 ), an intermediate sleeve ( 7 ), a backdrop or a backdrop intermediate bearing. Fully variable valve train device ( 1 ) according to one of the preceding claims, characterized in that the axis ( 5 . 105 ) is a hollow axle. Internal combustion engine with at least one fully variable valve drive device ( 1 ) according to one of the preceding claims, wherein in particular the internal combustion engine has more than one cylinder and for each cylinder a fully variable valve drive device ( 1 ) is provided. Motor vehicle with an internal combustion engine according to claim 19. Method for producing a fully variable valve drive device ( 1 ) comprising the steps of: cutting to length a round body, in particular a hardened hollow tube ( 5 . 105 ), wherein preferably the Rundling on one of the auffädelnden components ( 6 . 6a . 6b . 7 . 139 . 150a . 150b . 159a . 159b ) protruding length after cutting to length, - pushing on at least one on the Rundling to be stored component ( 6 . 6a . 6b . 7 . 139 . 150a . 150b . 159a . 159b ), preferably at least three components ( 6 . 6a . 6b . 7 . 139 . 150a . 150b . 159a . 159b ) and - axial securing of the component to be stored ( 6 . 6a . 6b . 7 . 139 . 150a . 150b . 159a . 159b ) by a securing element ( 11 . 14 . 19 . 111 . 111b ). A method according to claim 21, characterized in that the fully variable valve drive device ( 1 ) according to one of claims 1 to 18 by the securing element ( 11 . 14 . 19 . 111 . 111b ) against axial falling apart of the components ( 6 . 6a . 6b . 7 . 139 . 150a . 150b . 159a . 159b ) is protected.