DE102007023107A1 - Crankshaft bearing for multi-cylindrical internal-combustion engine, has bearing shell provided with ring channels, and passages for exhausting lubricating oil through bearing shell to channel that is provided in area of ring channels - Google Patents

Abstract

The bearing has a bearing shell (7) provided with ring channels (13, 14) in an area of axial end, and passages (16) for exhausting of lubricating oil through the bearing shell to a channel (18) is provided in the area of the ring channels. The channel (18) is connected with an exhaust pump that supplies the sucked lubricating oil to the lubricant system of an internal-combustion engine. A main bearing pin (1) of a crankshaft (2) is supported in the bearing shell.

Description

The The invention relates to a crankshaft bearing of a multi-cylindrical Internal combustion engine, with a bearing block, a bearing shell mounted in the bearing block and a main bearing journal of the crankshaft mounted in the bearing shell, wherein the bearing shell is provided with at least one annular channel, which is open on the main journal side facing, wherein Further, the bearing block with a first channel for feeding from lubricating oil to the bearing shell and the bearing shell with a Passage for supplying the lubricating oil through the Bearing shell is provided to the main journal, and the bearing shell in the region of the at least one annular channel with at least one Passage for discharging lubricating oil through the Bearing shell and the bearing block with a second channel for removal the lubricating oil is provided by the bearing shell.

Such a crankshaft bearing is from the US 2,258,834 known. In this, the bearing block on two bearing block parts and the bearing shell on two bearing shell parts. Bearing chair and bearing shell are each divided horizontally. The respective bearing shell part has radially outwardly extending circular sector sections in the region of its free ends. at a distance from the circular sector sections in the region of one end of the bearing shell, the bearing shell is provided both on the side facing the main journal and the side facing the bearing with a radially outwardly or radially inwardly open annular channel. These two annular channels are provided with a passage for discharging lubricating oil through the bearing shell. Approximately halfway along the axial length of the bearing shell, a bearing cup part is provided with a passage for supplying the lubricating oil through the bearing cup to the main bearing pin. The lubricating oil discharged from the bearing block through the second channel is collected in an oil pan. The cross section of the respective annular channel is rectangular. The respective annular channel has a relatively low depth / width ratio.

at This crankshaft bearing results in a minimized loss of lubricating oil in the area of the bearing due to the special design of the bearing shell parts with the radially outwardly extending end-side Approaches. The access of lubricating oil is about on half the axial length of the bearing shell and the discharge the lubricant only in one end region of the bearing shell, in a relatively large distance to the arranged there, itself radially outwardly extending portion of the bearing shell. - The said design of the crankshaft bearing, in particular the bearing shell parts, is because of the described design quite expensive. this is also valid for mounting the crankshaft bearing.

Ring channels for collecting lubricating oil in bearing shells, wherein the annular channels are arranged in the axial end portions of the bearing shell and are radially inwardly open, are from US 2006/0013518 A1 and the WO 2005/038277 A1 known.

A bearing shell with radially inwardly disposed annular channel, which is connected via a bore in the bearing shell with a drainage channel, is made of DE-PS 832 968 known.

Other, plain bearings having shaft bearings are in the DE 195 37 192 C1 . DE-AS 2 149 207 and US 2,544,913 described.

at These bearing designs is disadvantageous in that to a considerable extent Lubricating oil from the lubrication gap can escape axially and thus comes in contact with the crankshaft cheeks, which friction losses to be recorded.

task The present invention is the crankshaft bearing of the the type mentioned above to further that the exit of the Lube oil is minimized from the lubrication gap and consequently Frictional losses due to contact of the lubricating oil with the crankshaft cheeks be minimized.

Solved The task is characterized in that the bearing shell in the range of the respective axial end is provided with an annular channel, and the bearing shell in the area of the ring channels with passages to the Discharge of lubricating oil through the bearing shell for second channel is provided, wherein the second channel for discharging the lubricating oil is connected to a suction pump and the suction pump the extracted lubricating oil the lubrication circuit the internal combustion engine feeds.

It Thus, this is the lubrication gap between the bearing shell and main journal leaking lubricating oil due to adhesiveness of the lubricating oil and of the crankshaft Centrifugal effect in the annular channels formed in the bearing shell spun. These are in the region of both axial ends of the bearing shell arranged. At one point on the circumference of the bearing shell is the respective Ring channel tapped by milled cuts and / or holes and flows into the second channel located in the camp chair. The lubricating oil is over this system, which with the suction pump is connected to the lubrication circuit fed again, without To create pantschverluste.

Due to the inventive design of the crankshaft bearing friction losses are minimized by the special leadership of the lubricating oil, since the contact between the lubricating oil, which emerges from the lubrication gap, and the crankshaft cheeks avoided or at least significantly reduced.

moreover is due to the design of the invention Crankshaft bearing the oil flow through the main bearing the crankshaft is reduced and thus optimized. moreover the leakage of the lubricating oil from the lubrication gap is minimized.

Preferably the storage chair has two storage chair parts. The camp chair is especially divided horizontally or vertically. The division level depends on the type of internal combustion engine. The inventive Crankshaft bearing is for a wide variety of types of internal combustion engines applicable, for example, series, V or Boxer engines.

The Bearing shell preferably has two bearing shell parts. The bearing shell is especially divided horizontally or vertically.

Under The aspect of the two-part bearing shell, the crankshaft bearing For example, be formed so that the passage for feeding the lubricating oil in the one bearing shell and the passages for discharging the lubricating oil in the other bearing shell are arranged. But it is just as conceivable to design choose where the passage for feeding the Lubricating oil and the passages for removal of the lubricating oil arranged in the same bearing shell part are. The particular design depends on the machine-specific Conditions from.

Further Features of the invention will become apparent from the dependent claims, the description of the drawing and the drawing itself, without this to be limited.

In the drawing are two embodiments of the invention illustrated but not limited to. It puts represents:

1 in a section a first embodiment of the crankshaft bearing according to the invention,

2 a spatial view of one of the two in the embodiment according to 1 Used bearing shell parts,

3 a spatial view of the other in the embodiment of the 1 Using bearing shell part,

4 an enlarged view of the in 1 illustrated section for the area of supply of the lubricant to the one bearing shell,

5 a correspondingly enlarged representation for the area of the other bearing shell,

6 A second embodiment of the invention to illustrate a modified construction of the bearing block,

7 a representation of the detail X according to 6 ,

The first embodiment according to 1 to 5 illustrated for the area of the main journal 1 a crankshaft of a multi-cylinder internal combustion engine, the bearing of the main journal 1 in the camp chair 3 the crankcase of the internal combustion engine. The axis of the main journal 1 is with the reference number 4 designated.

The camp chair 3 is divided horizontally and has an upper bearing block part 5 and a lower bearing block part 6 on. In the camp chair 3 is stored a bearing shell, which is also divided horizontally, thus from the upper bearing shell part 7 and the lower bearing cup part 8th consists.

The upper bearing block part 5 is with a first channel 9 for supplying lubricating oil to the upper bearing shell part 7 and the upper bearing cup part 7 with a through hole 10 for supplying the lubricating oil through the upper bearing shell part 7 to the main journal 1 Mistake. The through hole 10 in the upper bearing shell part 7 thus has the function of an oil lubrication hole. Because of through the through hole 10 the main journal 1 supplied lubricating oil, is formed between the bearing shell and the main journal 1 a circumferential lubrication gap 11 ,

Lubricating oil gets over the first channel 9 and the through hole 10 continuously the lubrication gap 11 fed, so that the lubricating oil tends, in the axial direction of the lubricating gap 11 on both sides in the direction of the crankshaft cheeks 12 the crankshaft 2 withdraw. To prevent this, the bearing shell has an annular channel in the region of the respective axial end 13 and 14 on, wherein the respective annular channel in a plane perpendicular to the axis 4 extends. Due to the split design of the bearing shell arise for the respective bearing shell part 7 respectively. 8th over each a semicircle extending annular channel sections 13a and 13b of the ring channel 13 and 14a and 14b of the ring channel 14 , The respective annular channel section is on the main journal 1 facing side and widens to the ground 15 down, the only with respect to the annular channel section 13a is illustrated. The respective annular channel portion has a relatively large depth-width ratio.

The through hole 10 is approximately in the half axial length of the upper bearing shell part 7 arranged, in the region of half the arc of this bearing shell part 7 ,

The lower bearing cup part 8th is about half of the arc of this bearing shell part with two through holes 16 provided, which are formed as bores and / or milled cuts. These through holes 16 serve to discharge the lubricating oil, which is in the ring channels 13 and 14 collects, radially outward through the lower bearing shell part 8th , There is the lower bearing shell part 8th with a depression 17 in the lower bearing block part 6 connected as part of a second channel 18 the discharge of the lubricating oil from the lower bearing shell part 8th through the lower bearing block part 6 serves. This channel 18 for discharging the lubricating oil is connected to a suction pump, not shown. This suction pump leads the extracted lubricating oil to the lubrication circuit of the internal combustion engine again.

3 clarifies that instead of or in addition to deepening 17 in the lower bearing block part 6 a depression 19 in the radially outer region of the lower bearing shell part 8th can be provided that the two through holes 16 connects with each other.

In the 4 and 5 is with arrows the flow direction of the lubricating oil when feeding to the camp ( 4 ) and removal from the warehouse ( 5 ).

The embodiment according to the 6 and 7 illustrates a specific variant in the crankshaft bearing in a boxer engine. Also there is the camp chair 3 from two bearing chair parts, whereby the bearing chair is however divided vertically. Shown is only one bearing block part 20 , While in the embodiment of the 1 to 5 the lubricating oil supply through the upper bearing block part 5 and the discharge of the lubricating oil through the lower bearing block part 6 takes place, happens in the embodiment of the 5 and 6 both the supply of lubricant and the removal of the lubricant through the bearing block part 20 , The design of this camp chair 20 thus arises according to the sectional view in 1 only with the difference that the section illustrated there is not a section in a plane, but rather an angled section, bent in the region of the axis 4 at an angle of about 140 °.

The representation of the 6 is the first channel 9 for supplying the lubricating oil and the second channel 18 to remove the lubricating oil. According to the arrangement of the channels 9 and 18 in this camp chair part 20 is of course the bearing shell to modify, one bearing shell part only the annular channel sections 13b and 14b and the other bearing shell part, the annular channel sections 13a and 14a as well as in flight with the two channels 9 and 18 the through hole 10 or the through holes 16 having.

As the representation of 6 it can be seen, the channels 9 and 18 , especially the channel 18 , quite kinked inside the camp chair part 20 run. As this bearing block part 20 to connect with the other, not illustrated bearing block part, in particular to be screwed, the screw used here 21 quite the second channel 18 push through. The screw 21 interspersed, as it in particular the detailed representation after 7 it can be seen concentric to the screw 21 arranged another channel 22 through which lubricating oil is passed.

In the embodiments shown, the lubricating oil supply is from the main channel coming to the first channel 9 and it gets over the second channel 18 Lube oil requested by means of a suction pump and returned to the lubrication circuit of the internal combustion engine, in particular fed directly to the main oil passage.

1

Main bearing journal

2

crankshaft

3

bearing block

4

axis

5

upper Bearing seat portion

6

lower Bearing seat portion

7

upper Bush part

8th

lower Bush part

9

first channel

10

Through Hole

11

lubricating gap

12

crankshaft cheek

13

annular channel

13a

Ring channel section

13b

Ring channel section

14

annular channel

14a

Ring channel section

14b

Ring channel section

15

reason

16

Through Hole

17

deepening

18

second channel

19

deepening

20

Bearing seat portion

21

screw

22

channel

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

• US 2258834 [0002]
• US 2006/0013518 A1 [0004]
• WO 2005/038277 A1 [0004]
• - DE 832968 [0005]
• - DE 19537192 C1 [0006]
• - DE 2149207 [0006]
• US 2544913 [0006]

Claims (12)

Crankshaft bearing of a multi-cylinder internal combustion engine, with a bearing block ( 3 ), one in the camp chair ( 3 ) bearing shell ( 7 . 8th ) and one in the bearing shell ( 7 . 8th ) mounted main journal ( 1 ) of the crankshaft ( 2 ), wherein the bearing shell ( 7 . 8th ) with at least one annular channel ( 13 . 14 ) provided on the main journal ( 1 ) facing sides, further wherein the bearing block ( 3 ) with a first channel ( 9 ) for supplying lubricating oil to the bearing shell ( 7 . 8th ) and the bearing shell ( 7 . 8th ) with a passage ( 10 ) for supplying the lubricating oil through the bearing shell ( 7 . 8th ) to the main journal ( 1 ), and the bearing shell ( 7 . 8th ) in the region of the at least one annular channel ( 13 . 14 ) with at least one passage ( 16 . 16 ) for discharging lubricating oil through the bearing shell ( 7 . 8th ) and the camp chair ( 3 ) with a second channel ( 18 ) for removing the lubricating oil from the bearing shell ( 3 ), characterized in that the bearing shell ( 7 . 8th ) in the region of the respective axial end with an annular channel ( 13 . 14 ), and the bearing shell ( 7 . 8th ) in the region of the ring channels ( 13 . 14 ) with passages ( 16 . 16 ) for discharging lubricating oil through the bearing shell ( 7 . 8th ) to the second channel ( 18 ), the second channel ( 18 ) is connected to the discharge of the lubricating oil with a suction pump and the suction pump feeds the sucked lubricating oil to the lubrication circuit of the internal combustion engine. Bearing according to claim 1, characterized in that the bearing block ( 3 ) two bearing chair parts ( 5 . 6 ) having. Bearing according to claim 2, characterized in that the bearing block ( 3 ) is divided horizontally or vertically. Bearing according to one of claims 1 to 3, characterized in that the bearing shell ( 7 . 8th ) two bearing shell parts ( 7 . 8th ) having. Bearing according to claim 4, characterized in that the bearing shell ( 7 . 8th ) is divided horizontally or vertically. Bearing according to claim 4 or 5, characterized in that the passage ( 10 ) for supplying the lubricating oil in the one bearing shell part ( 7 ) and the passages ( 16 . 16 ) for discharging the lubricating oil in the other bearing shell part ( 8th ) are arranged. Bearing according to claim 4 or 5, characterized in that the passage ( 10 ) for supplying the lubricating oil and the passages ( 16 . 16 ) for discharging the lubricating oil in the same bearing shell part and / or the same bearing block part ( 20 ) are arranged. Bearing according to one of claims 1 to 7, characterized in that the passage ( 10 ) for supplying the lubricating oil through the bearing shell ( 7 . 8th ) is formed as a bore. Bearing according to one of claims 1 to 8, characterized in that the passages ( 16 . 16 ) for discharging the lubricating oil through the bearing shell ( 7 . 8th ) are formed as milled and / or bores. Bearing according to one of claims 1 to 9, characterized in that the respective annular channel ( 13 . 14 ) widens towards the bottom of the canal. Bearing according to one of claims 1 to 10, characterized in that the respective annular channel ( 13 . 14 ) has a relatively large depth-to-width ratio. Bearing according to one of claims 2 to 11, characterized in that the bearing block parts are screwed together on both sides of the bearing shell, wherein the respective screw ( 21 ) concentrically a lubricating oil channel ( 22 ) penetrated in the bearing shell parts, in particular a lubricating oil channel ( 22 ) which enters the first and / or second channel ( 18 ) opens.