DE102012208076A1 - Rocker arm bearing device i.e. rocker arm box, for transferring lift curve of cam from camshaft to inlet and outlet valves for V-design internal combustion engine, has flanges, where device is integrally designed with flanges and channel - Google Patents

Abstract

The device i.e. rocker arm box (20), has a receiving device (22) for receiving a rocker arm (23) and another rocker arm. Connection flanges (27, 28) connect a charging device and a coolant return channel (26). The device is integrally designed with the flanges, the coolant return channel and the receiving device. The rocker arms are pivotably mounted at a rocker arm strap. The rocker arm strap is extensively mountable at the receiving device in bending torque-free manner. A coolant guide channel is fluidically connected with the coolant return channel. An independent claim is also included for a cylinder head device.

Description

The present invention relates to a Kipphebellagervorrichtung with a receiving device for receiving a rocker arm according to the preamble of claim 1. The invention also relates to a cylinder head device with a Kipphebelellagerervorrichtung according to the preamble of claim 9 and an internal combustion engine with a supercharger and a coolant return assembly according to the preamble of Claim 10.

In known internal combustion engines to actuate an intake or exhaust valve rocker arms are used by means of which the lift curve of a cam is transmitted from the camshaft to the corresponding valve. The rocker arm is pivotally mounted on a rocker shaft and is actuated at one end by a translational movement of a coupled with the camshaft bumper, whereupon it comes to a corresponding translational counter-movement of the other end of the rocker arm due to the pivoting movement about the rocker arm axis on the respective valve is transmitted.

The rocker arms are usually determined to be pivotable on a cylinder head arranged Kipphebelbock. In many internal combustion engines, a charging device is additionally provided in the region of the cylinder head in order to enable exhaust gas charging. It is also known to provide coolant return passages in the cylinder head region in order to recirculate coolant, which has been used for cooling the working cylinder and / or the cylinder heads, to a heat exchanger.

1 The drawing shows a generic embodiment of an internal combustion engine with a Kipphebelbock for receiving the rocker arm in the region of the cylinder head. The rocker arm is manufactured as a separate component and is determined during the manufacture of the internal combustion engine on the cylinder head. The rocker arm has a continuous rocker shaft on which the rocker arms are pivotally mounted on both sides of the Kipphebellagerbocks. In the known internal combustion engine also a cooling water return assembly is also provided, which is also manufactured as a separate casting. This is then mounted in the region of the cylinder head, and leads the cooling water from cylinder head to cylinder head and finally to a heat exchanger.

Finally, a charging device is provided in the region of the cylinder head, which is supported in the known internal combustion engine on an exhaust pipe and provided in the region of the cylinder head on the crankcase top holes. This type of support requires a stiff and heavy design of the exhaust pipe, which must also be made in a complex casting process.

It is disadvantageous in the known internal combustion engine that its production with supercharging, cooling water return system and with rocker arms in the cylinder head area is very complicated and expensive, especially by the associated with the attachment and connection of various components such as rocker arm, cooling water return assembly and charging in the cylinder head high effort , Already in the production of individual modules and also during their assembly many individual process steps are incurred. For example, a complex machining of the crankcase is necessary to create the appropriate recordings for supporting the charging device.

The rocker shaft is exposed to high bending loads in the known internal combustion engine, since it has only a central support and the opening force of the bumpers leads to a bending moment. The rocker shaft must therefore be formed with a large diameter, which increases the net mass of the internal combustion engine and the manufacturing cost.

Also, the Kipphebelbock is exposed to appropriate loads and therefore must also be made very stiff, so for example by means of a forging process.

In addition, the connections between the supercharger and the cylinder head pose a problem, since the supercharger tends to body vibration and their supports to the cylinder head therefore must be made very solid and expensive.

It is therefore an object of the invention to provide a Kipphebellagervorrichtung that is cheaper to manufacture and to arrange with less effort in the area of a cylinder head, and with less constructive effort with other modules, can be combined. Moreover, it is also an object of the invention to provide a less expensive to manufacture cylinder head device, In addition, an internal combustion engine with at least one Kipphebellagervorrichtung be provided with the said advantages.

The invention solves this problem with regard to the rocker arm bearing device with the features according to claim 1. Advantageous embodiments are described in further claims. The cylinder head device is in claim 9 described, and an internal combustion engine is described in claim 10.

The invention provides a rocker arm bearing device with a receiving device for receiving a rocker arm, with at least one connection means for connecting a charging device and a coolant return channel, wherein the rocker arm bearing device is formed integrally with the connection means, the coolant return channel and the receiving device.

The receiving device is formed, for example, as a corresponding storage for one or more Kipphebelachsen and the connecting means as a flange. The charging device may be a single-stage or multi-stage assembly with exhaust gas turbochargers, for example a high-pressure and a low-pressure turbocharger connected in series. The coolant return channel is designed as a section of an entire coolant return system, that is, for example, a tubular piece-shaped channel which can be connected to other components, for example, with further pipe sections to the coolant return system.

Since the rocker arm bearing device according to the invention is formed integrally with the connection means, with the coolant return channel and the receiving device, an internal combustion engine to be equipped with the rocker arm bearing device according to the invention has a simpler construction and is less expensive to manufacture. The production is therefore less expensive, among other things, because fewer individual components must be made. For example, the coolant return channel does not have to be manufactured as a separate component, but instead can be formed as a simple tubular piece-shaped channel in one piece with the rocker arm bearing device. In this way, the Kipphebellagervorrichtung invention provides a functional integration of various modules in a confined space and allows cost-effective production.

Also, the assembly of various components, such as the Kipphebellagervorrichtung, the coolant return and the charging device, is much easier to perform, since there is already a connection means for the charging device and a coolant return passage on the Kipphebellagervorrichtung. The charging device is connected directly to the connection means. Unlike the known internal combustion engine, it is therefore not necessary to work on the crankcase for receiving the charging device by, for example, bores are provided, with which recordings, to which the charging device is attached, can be screwed. Since the charging device is now supported via the connection means on the rocker arm bearing device and no longer on an exhaust pipe and the receptacles on the cylinder crankcase, the entire arrangement is much more stable and the charging device is better supported.

Since a part of the cooling water return system is already present in the form of the coolant return channel, more tubes can be easily plugged with this. Unlike the known internal combustion engine, it is therefore no longer necessary to make special pipes or channels for the cooling water return system with a complex die-casting process with corresponding openings, which can then be connected to the cylinder head. For the assembly of other components of the coolant return system with the existing coolant return channel are simple, for example, seamlessly drawn tubes. In the selection of materials thus greater freedom. In this case, pipes can be selected from a correspondingly lightweight material, so that the entire internal combustion engine has a lower weight. The pipes and thus the entire coolant return system are therefore also much cheaper in the production than self-made for use on the internal combustion engine coolant channels.

According to a preferred embodiment, the rocker arm bearing arrangement according to the invention has at least one rocker arm, which is mounted so as to be pivotable on a rocker arm axis, wherein the rocker arm axis can be stored on the mounting device largely free of bending moments.

The largely bending moment-free bearing can be made for example with a fixed-lot storage at two points by the Kipphebelachse each rocker arm is set, for example by means of two screws on the Kipphebellagervorrichtung. The Kipphebelachsen can preferably on the cylinder head by means of the Kippellagervorrichtung enforcing screws. The receiving device is provided for this purpose for each of the screws with a corresponding bore.

Since the rocker shaft on the receiving device is largely free of bending moments storable, only a small load on the rocker shaft axis occurs. Preferably, the rocker arm axis can be stored in the axial direction in the region of the opposite ends. Since the rocker arm axle of the rocker arm bearing device according to the invention experiences a much less heavy load than known rocker arm bearing devices, the axles can also be made correspondingly thinner and thus less expensive.

The Kipphebellagervorrichtung is also preferably designed as a rocker box with circumferential support walls and provided for mounting on a cylinder head. The coolant return channel is preferably formed integrally with one of the support walls. The Kipphebellagervorrichtung also preferably has a circumferential, box-shaped profile, which is designed to be open at the top and bottom, closed from above but with a correspondingly formed lid.

Since such Kipphebellagervorrichtung is placed from above on the cylinder head and secured accordingly, occurs on the rocker box no lateral force load, but only a compressive load, so acting in a vertical direction load. In this case, the circumferential support walls shield the rocker arms from the side, and from below the Kipphebellagervorrichtung is shielded from the cylinder head. In this way, the components are shielded from contamination or damage.

The Kipphebellagervorrichtung with circumferential, box-shaped profile preferably also has a lubricant supply device with which lubricant can be entered from below into the rocker box for lubrication of Kipphebelachsen.

According to one embodiment of the invention, the Kipphebellagervorrichtung by means of the receiving device passing through and the Kipphebelachse on the receiving device arranging screws on a cylinder head releasably fixed. For this purpose, the Kipphebellagervorrichtung, for example, one or more holes through which screws can be pushed through, which are then bolted to the cylinder head. Since it completely passes through the rocker arm bearing device, a screw can be completely inserted through the rocker arm bearing device and bolted to the cylinder head arranged below the rocker arm bearing device.

Since the Kipphebellagervorrichtung is releasably fixable to a cylinder head in this manner, the housing of the Kipphebelellagerervorrichtung is only loaded on pressure. In particular, no transverse force loads occur on the rocker arm bearing device, so that it must be made less robust than in the known internal combustion engine. The housing of the Kipphebellagervorrichtung therefore there is a largely free choice of materials, so it can be prepared for example as an aluminum casting.

According to a special embodiment of the invention, the rocker arm bearing device has at least one support element that can be fixed to the receiving device for supporting the charging device on the rocker arm bearing device. The support elements can be fixed, for example, to the connection means present on the rocker arm bearing device.

Unlike the known internal combustion engine, therefore, the crankcase in the cylinder head area does not need to be machined to provide bores to which the charging device is attached. The mass force of the inflowing exhaust gas in the inventive arrangement thus introduced into the Kipphebellagervorrichtung and not in an exhaust pipe. Therefore, the arrangement of the invention is much more stable.

The support elements may be correspondingly short, so that the support of the charging device is very stable. There is therefore less vibration in the region of the charging device than in the known internal combustion engine. The support element must therefore not be designed so stiff as is the case with the known arrangement and there is thus more choice of possible materials and the production is also cheaper. The support elements can be manufactured as simple sheet metal parts, a machining as in the preparation of the load of the supercharger at least partially receiving exhaust pipe and corresponding support elements for receiving the charging device is not necessary.

According to an advantageous embodiment of the invention, the coolant return channel is designed as a tubular piece, permeable hollow body. The end pieces of the hollow body are in each case connectable to other components of the coolant return system, that is, for example, with corresponding further tubes. The other tubes of the coolant return system can be manufactured in a simple manner, that is, for example, be pulled and do not have to be made with a complex sand casting or die casting process. In this way, in turn costs in the production and weight are saved in the internal combustion engine. Simple purchased parts can be used for the pipes.

According to a further embodiment of the rocker arm bearing device according to the invention, the coolant return channel on the inner circumference of the respective end regions in each case has a circumferential groove for receiving a sealing device. As a sealing device, for example, an O-ring can be inserted into the circumferential groove. In this way it is ensured that simple connections between the coolant return channel and adjacent fluid transport bodies, so for example further pieces of pipe, are tight, without the Connection would have to be sealed with a complex process such as welding.

The rocker arm bearing device according to the invention also preferably has a coolant guide channel which is fluidically connected to the coolant return channel and can be fluidically connected to a complementary guide channel in the cylinder head. In this way, coolant which has been used in the cylinder for cooling, transported by the Kipphebellagervorrichtung through into the coolant guide channel. For this purpose, for example, a corresponding hole in the Kipphebellagervorrichtung or a corresponding tube is provided.

The invention also encompasses a cylinder head device with a rocker arm bearing device as described above, and with a cylinder head having at least one bore for receiving at least one screw passing through the rocker arm receiving device, and with a cover device which can be screwed to the rocker arm bearing device.

The cylinder head device is lighter and more compact than the known cylinder head device because the rocker arm bearing device according to the invention permits a simpler functional integration of the various subassemblies.

For fixing the rocker shaft axes, as explained above, these are fixed to the rocker arm bearing device, wherein the bolts pass through the rocker arm bearing device and are then screwed into the bore in the cylinder head, so that at the same time the rocker arm bearing device is fastened to the cylinder head. On the underside of the Kipphebellagervorrichtung also preferably centering pins are arranged, which can be inserted into matching openings in the cylinder head to achieve a precise relative position of the Kipphebelellagervorrichtung on the cylinder head.

Thus, the Kipphebellagervorrichtung is covered on the bottom of the cylinder head, laterally protected by circumferential support walls, and shielded from the top of the cover device provided as a hood. In this way, the components in the area of the cylinder head are protected from contamination and damage. The lid device can be made of lightweight material, so that the entire cylinder assembly is very light.

Finally, an internal combustion engine with a charging device, a coolant return assembly and a plurality of rocker arm bearing devices, as described above, the subject of the invention.

The internal combustion engine according to the invention is less expensive to manufacture, it is lighter and more compact, and at the same time it allows a functional integration of supercharger, cooling water return and a rocker arm storage.

The invention will now be described by way of example with reference to the accompanying drawings. Show it:

1 a cross-sectional view of a known internal combustion engine in V-arrangement

2 a perspective view of a rocker arm bearing device according to the invention;

3 a perspective view of a cylinder head of an internal combustion engine for receiving the Kipphebellagervorrichtung invention;

4 a perspective view of the cylinder head with a Kipphebellagervorrichtung invention arranged thereon;

5 a perspective view of the cylinder head with the rocker arm bearing device according to the invention and a hood;

6 a perspective view of a portion of a coolant return system and a charging device with support on a rocker arm bearing device according to the invention;

7 a cross-sectional view of a rocker arm bearing device according to the invention and a cylinder head; and

8th a perspective view of the Kipphebellagervorrichtung invention and the cylinder head.

1 shows a cross-sectional view of an internal combustion engine - a V-engine - with two cylinders shown, each with a rocker arm 18 According to the state of the art. The respective cylinder with a cylinder liner 1 and a cylinder head 2 is inside a crankcase 3 with crankcase covers 4 arranged.

About a fuel storage 5 Fuel is provided, then with an injector 9 is injected into the cylinder interior and that in about a charge air line 6 supplied charge air, whereupon the fuel-air mixture is ignited in the cylinder interior, with one on a Main bearing support 7 mounted crankshaft 8th is driven. A connecting rod 13 translates each case the linear movement of a working piston 16 in the cylinders in a circular movement of the crankshaft 8th , Finally, between the two cylinders is a central camshaft 14 shown.

The internal combustion engine is via a cooling water supply line 10 supplied with cooling water, which in a cylinder adjacent to each adjacent cooling water space 11 and then via a cooling water return line 12 is returned. The internal combustion engine also has a central oil supply line 15 through which the components shown are supplied with lubricant.

At the in 1 also shown internal combustion engine is a charging device with an exhaust manifold 17 available. This is in the area of the cylinder head 2 on the crankcase 3 supported. In this area is also a rocker arm 18 arranged on which rocker arm for actuating in the cylinder head 2 arranged valves are arranged.

Finally, in the area of cylinder heads 2 also a cooling water return assembly 19 arranged. This was made as a single component by means of a die casting process and is in the manufacture of in 1 shown internal combustion engine on the crankcase 3 attached.

2 shows a perspective view of an embodiment of a rocker arm bearing device according to the invention 20 , The rocker arm bearing device 20 is as of circumferential support walls 21 surrounded rocker box formed, wherein the supporting walls 21 the components in the interior of the rocker box 20 take up. Also in the interior of the rocker box 20 is a rocker ball bearing 22 arranged at the two rocker arms 23 . 24 and two rocker arm shafts associated with the rocker arms 41 are fixed. The rocker axes 41 are each using two screws 25 at an in 3 Cylinder head shown in detail 2 set, wherein the rocker arm bearing device 20 Has holes through which the screws 25 can be pushed through and up to the cylinder head 2 extend.

Because the two rocker arms 23 . 24 at two points and therefore largely free of bending moments on the respective rocker arm bearings 22 are stored, it comes to less bending moment load than the rocker arms in the 1 illustrated internal combustion engine. The rocker axes 41 the rocker arm 23 . 24 can therefore be formed with a smaller diameter than the rocker shaft of the known motor, so that they are cheaper to manufacture and also lighter.

The rocker arm bearing device 20 is integral with a coolant return channel 26 and with two connection flanges 27 . 28 to connect an in 6 illustrated charging device 34 educated. This allows a compact, functional integration of a coolant return system 35 , the charging device 34 and the rocker arm 23 . 24 ,

The coolant return channel 26 is intended for connection to pipes, not shown, of a coolant return system. He has for this in the end region on the inner circumference each have a circumferential groove 39 on, which is designed to receive a sealing device, so for example an O-ring. The coolant return channel 26 For example, with a further tube in a simple manner with a coolant return channel 26 an adjacent rocker arm bearing device 20 connect to the forwarding of coolant, the seal in the circulation groove 39 the connection already seals, without a further, complex processing of the corresponding components would be necessary. Therefore, with the coolant return channel 26 also be connected according to standard pipes, it is therefore not necessary to produce them with a special method such as by die casting. The standard tubes must therefore only to the appropriate length between two adjacent Kipphebellagervorrichtungen 20 be cut to size together with the respective coolant return channel 26 the coolant return system 35 train.

At the bottom, the rocker box 20 Pins 29 which are intended, in corresponding holes 30 in the cylinder head 2 to be included.

The cylinder head 2 is in 3 shown. Because the rocker box 20 is attached and fixed from above on the cylinder head, it is claimed only by compressive forces, there are no or only very small lateral forces.

The cylinder head 2 is from a coolant duct 32 interspersed with a corresponding coolant return passage in the rocker box 20 is fluidly connected, via which coolant finally via the connecting flanges 27 . 28 flanged coolant return assembly is supplied.

In 4 is the rocker box 20 in on the cylinder head 2 attached state shown. So that the corresponding components of the rocker box 20 are protected from above from dirt and damage, the invention finally sees a hood 33 in front, which from the top of the rocker box 20 mounted and screwed to the rocker box. The rocker box 20 with hood 33 , is in the state fixed to the cylinder head in 5 shown.

6 shows a perspective view of a portion of a charging device 34 and their support on a rocker box 20 as he also in the 2 - 5 is shown.

The charging device 34 is each by means of a variety of with flanges 27 . 28 connected short support elements 36 on the rocker box 20 supported. Thus, the support, unlike the known, in 1 shown internal combustion engine, not at an exhaust power, and at the top of the cylinder crankcase, but on the rocker box 20 , This can be dispensed with in the manufacture of a corresponding internal combustion engine on a complex processing of the crankcase.

The in the 2 to 5 shown coolant return channels 26 can lead to a coolant return system shown only schematically 35 get connected.

7 shows a cross-sectional view of a portion of the rocker arm bearing device according to the invention 20 , It is recognizable as the in the rocker box 20 arranged rocker arms 23 by means of one of the screws 25 on the rocker box 20 is releasably fixed. The rocker arm 23 actuates, against the action of a respective spring 38 , A not-shown valve. The screw 25 passes through the entire rocker box 20 , and the end area 37 the screw 25 is with the cylinder head 2 with a dedicated threaded hole 40 screwed.

In the 8th Finally, is another perspective view of the rocker box 20 shown. The fixing screws 25 with which the rocker box 20 on the cylinder head 2 are attached, are shown visible from above and take between each one of the rocker arm 23 . 24 Concealed rocker shaft on which those of the respective rocker arm 23 . 24 is pivotally mounted.

With regard to features of the invention which are not explained in detail above, reference is expressly made to the claims and the drawings, moreover.

LIST OF REFERENCE NUMBERS

1

Cylinder liner

2

cylinder head

3

crankcase

4

Kurbelgehäusedeckel

5

Fuel storage

6

Turbo pipe

7

Main bearing support

8th

crankshaft

9

injector

10

Cooling water supply line

11

Cooling water space

12

Cooling water return line

13

connecting rod

14

camshaft

15

Oil supply line

16

working piston

17

exhaust manifold

18

Kipphebelbock

19

Cooling water return line assembly

20

Kipphebellagervorrichtung

21

Retaining walls

22

Rocker Arm

23

rocker arm

24

rocker arm

25

screw

26

Coolant return channel

27

flange

28

flange

29

Centering

30

admission

31

crankcase

32

Coolant duct

33

Hood

34

charging

35

Coolant return system

36

supporting

37

End of a screw

38

feather

39

groove

40

drilling

41

rocker shaft

Claims (10)

Rocker arm bearing device with a receiving device ( 22 ) for receiving a rocker arm ( 23 . 24 ), characterized in that the rocker arm bearing device ( 20 ) at least one connection means ( 27 . 28 ) for connecting a charging device ( 34 ) and a coolant return channel ( 26 ) and in one piece with the connection means ( 27 . 28 ), the coolant return channel ( 26 ) and the receiving device ( 22 ) is trained. Toggle bearing device according to claim 1, characterized by at least one on a rocker shaft ( 41 ) pivotally mounted rocker arms ( 23 . 24 ), wherein the rocker shaft ( 41 ) at the receiving device ( 22 ) is largely free of bending moments storable. Toggle bearing device according to claim 1 or 2, characterized in that the rocker arm bearing device ( 20 ) as a rocker box with circumferential retaining walls ( 21 ) is formed and is provided for mounting on a cylinder head. Toggle bearing device according to one of the preceding claims, characterized in that the rocker arm bearing device ( 20 ) by means of the receiving device ( 22 ) and the rocker shaft ( 41 ) at the receiving device ( 22 ) of arranging screws ( 25 ) Is releasably secured to a cylinder head. Kipphebellagervorrichtung according to any one of the preceding claims, characterized by at least one of the receiving means ( 27 . 28 ) fixable support element ( 36 ) for supporting the charging device ( 34 ) on the rocker arm bearing device ( 20 ). Toggle bearing device according to one of the preceding claims, characterized in that the coolant return channel ( 26 ) is formed as a tubular piece flow-through hollow body. Toggle bearing device according to one of the preceding claims, characterized in that the coolant return channel ( 26 ) on the inner circumference of the respective end regions in each case one circumferential groove ( 39 ) for receiving a sealing device. Toggle bearing device according to one of the preceding claims, characterized by a with the coolant return channel ( 26 ) fluidically connected coolant guide channel ( 32 ), which is fluidically connectable with a complementary guide channel in the cylinder head. Cylinder head device, characterized by a rocker arm bearing device ( 20 ) according to one of the preceding claims and by a cylinder head with a bore ( 40 ) for receiving a rocker arm bearing device ( 20 ) penetrating screw ( 25 ) and with a on the rocker arm bearing device ( 20 ) arranged lid device ( 33 ). Internal combustion engine with a charging device ( 34 ) and a coolant return assembly ( 35 ), characterized by a plurality of rocker arm bearing devices ( 20 ) according to one of claims 1 to 8.

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