DE102016015315A1 - Connecting rod for an internal combustion engine - Google Patents

Abstract

The invention relates to a connecting rod (10) for an internal combustion engine, comprising a connecting rod main body (12) with at least one connecting rod eye (14) arranged in the connecting rod main body (12) and at least one bearing element (16) received in the connecting rod eye (14) at an investment area (20) of the Pleuelgrundkörpers (12) with this in Appendix. The Pleuelgrundkörper (14) has at the contact area (20) has a recess arrangement (30) for storing oil (18) and for supplying a bearing surface (17) of the bearing element (16) with oil (18).

Description

The invention relates to a connecting rod for an internal combustion engine, with a Pleuelgrundkörper, with at least one arranged in the Pleuelgrundkörper connecting rod and at least one recorded in the connecting rod bearing element, which is at a contact area of the Pleuelgrundkörpers with this in Appendix.

Such connecting rods are used, for example, in internal combustion engines in order to absorb expansion forces of a fuel-air mixture occurring in a combustion process in a combustion chamber and transmit them to a crankshaft of the internal combustion engine.

From the DE 195 48 756 A1 a device for supplying lubricating oil to a longitudinal bore in a rotating shaft and to respective sliding surfaces of a radial sliding bearing for this wave is known. A circumferential groove of the radial sliding bearing divides this into a narrower, serving only for sealing and a wider, serving only for radial support portion. The longitudinal bore receives via radial channels, the circumferential groove, holes in a bearing shell and an oil supply oil, which serves to supply connecting rod bearings of an internal combustion engine.

The DE 10 2009 000 303 A1 describes a plain bearing shell and a plain bearing for a crankshaft main bearing or a connecting rod bearing, with a sliding surface for engagement with a shaft journal or a crank pin of a recessed into the sliding surface oil pressure pocket and opening into the oil pressure pocket oil supply. The oil pressure pocket is provided here directly on the plain bearing shell.

Object of the present invention is to provide a connecting rod of the type mentioned, which allows an improved oil supply of a recorded in the at least one connecting rod bearing shaft.

This object is achieved by a connecting rod having the features of patent claim 1. Advantageous developments of the present invention are the subject of the dependent claims.

The invention is based on a connecting rod for an internal combustion engine, with a Pleuelgrundkörper, with at least one arranged in the Pleuelgrundkörper connecting rod and at least one recorded in the connecting rod bearing element, which is at a contact area of the Pleuelgrundkörpers with this in Appendix. The abutment region can correspond to a partial surface of the connecting rod eye and thus have a radius of curvature matching the connecting rod eye.

According to the invention, the Pleuelgrundkörper at the contact area on a recess arrangement for storing oil and for supplying a bearing surface of the bearing element with oil. This is advantageous since this allows an improved supply of oil to a shaft accommodated in the at least one connecting rod eye. The recess arrangement can serve here as an oil reservoir, via which the bearing surface of the bearing element is wetted with oil. The bearing element may be formed, for example, as a bearing shell, wherein on the bearing surface, a shaft or a shaft journal, for example, a crankshaft can be supported and slidably mounted. By wetting the bearing surface by means of oil from the recess arrangement, in particular cold starting properties of an internal combustion engine can be improved and thus even at a starting operation of the internal combustion engine sufficient oil quantities of the oil to reduce the friction between the bearing surface and the shaft or the shaft journal are provided. Advantageously, the recess arrangement is disposed on a geodetically in installation position of the connecting rod in the internal combustion engine deep region below the connecting rod, so that any, gravity-induced flow of oil from the recess arrangement prevented and thus always a sufficient amount of oil to supply the storage space are kept can. It is a further advantage if the recess arrangement extends over a maximum tilting angle of the connecting rod, which is established during operation of the internal combustion engine, since it can be achieved that at least one partial area, for example a partial recess of the recess arrangement, always reaches a maximum pivoting angle of the connecting rod is arranged geodetically lying down. The recess arrangement can generally be at least partially covered by the at least one bearing element in its contact with the contact area, so that a particularly secure storage of oil in the recess arrangement is made possible.

In an advantageous development of the invention, the contact area completely delimits a recess opening of the recess arrangement covered by the at least one bearing element. In other words, the recess opening advantageously extends within the abutment area and is spaced from respective area edges of the abutment area. Thereby, an undesirable, lateral flow of oil from the recess arrangement can be prevented. Oil can be introduced into the recess arrangement via the recess opening and can be diverted out of the recess arrangement. With others Words, the oil is interchangeable through the recess opening.

In a further advantageous development of the invention, the at least one bearing element has at least one oil exchange opening, by means of which oil is exchangeable via the recess opening between the recess arrangement and a shaft receiving area of the connecting rod. This is advantageous since the oil exchange opening enables a particularly targeted and demand-oriented introduction of oil into the recess arrangement or discharge of oil from the recess arrangement. By way of example, the recess arrangement can be filled with oil via the oil replacement opening during engine operation of the internal combustion engine, which is then available for supplying the storage area, for example, for a subsequent cold start. The shaft receiving portion may be limited at least partially by the bearing surface and serves to receive a shaft which may be formed, for example, as a shaft journal of a crankshaft. The shaft receiving area may be peripherally limited by the at least one bearing element. Thus, in the case of a proper use of the connecting rod, the shaft or the shaft journal can be in contact with the at least one bearing element.

In a further advantageous development of the invention, the bearing element has at least one ventilation opening, by means of which air can be exchanged via the recess opening between the recess arrangement and the shaft receiving area. This is advantageous because a particularly simple way of venting the recess arrangement is created by this ventilation opening and also, for example, a pressure equalization is possible.

In a further advantageous development of the invention, the recess arrangement has a plurality of partial recesses which are fluidically connected to one another via respective overflow openings. This is advantageous since this makes it possible to provide a sufficient amount of oil in the recess arrangement in a particularly reliable manner even with different connecting rod pin rod positions, that is to say with different tilting angles of the connecting rod.

In a further advantageous embodiment of the invention, the bearing element in its arrangement projects beyond the contact area of respective, mutually opposite arrangement ends of the recess arrangement in the circumferential direction of the connecting rod. This is advantageous since this makes it possible in a particularly simple manner to at least substantially close the recess arrangement by means of the at least one bearing element and thus to prevent undesired outflow of oil from the recess arrangement. The recess arrangement can generally have a recess width of, for example, 2 mm to 3 mm in a direction of extent perpendicular to the circumferential direction of the connecting rod eye. This recess width may for example correspond to a groove width.

Further advantages, features and details of the invention will become apparent from the following description of a preferred embodiment and from the drawing. The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the description of the figures and / or in the figures alone can be used not only in the respectively specified combination but also in other combinations or in isolation, without the scope of To leave invention.

• 1 eine Perspektivansicht auf eine für die Erfindung beispielhafte Ausführungsform eines Pleuels; und
• 2 eine Detailansicht eines Teilbereichs des Pleuels, wobei eine Ausnehmungsanordnung des Pleuels geschnitten dargestellt ist.

Showing:

• 1 a perspective view of an exemplary embodiment of a connecting rod for the invention; and
• 2 a detailed view of a portion of the connecting rod, wherein a recess arrangement of the connecting rod is shown in section.

1 shows a connecting rod 10 for a combustion engine not shown here, with a Pleuelgrundkörper 12 and at least one in the connecting rod main body 12 arranged connecting rod eye 14 , In the connecting rod eye 14 can be a shaft, such as a shaft journal 22 (please refer 2 ) be received and stored in a crankshaft.

2 shows that in the connecting rod eye 14 , which is present as a so-called large connecting rod eye of the connecting rod 10 is formed, designed as a bearing shell bearing element 16 is included. The bearing element 16 is at an investment area 20 of the Pleuelgrundkörpers 12 with this in attachment.

The connecting rod main body 12 points to the investment area 20 a recess arrangement 30 for storing oil 18 and for providing a storage area 17 of the bearing element 16 with oil 18 on. The in 2 dashed lines indicated shaft journal 22 is in one, by means of the storage area 17 at least partially limited wave receiving area 15 of the connecting rod 10 arranged.

The investment area 20 in the present case delimits a recess opening covered by the at least one bearing element 16 32 the recess arrangement 30 Completely. About the recess opening 32 is the oil 18 in the recess arrangement 30 einleitbar or from the recess arrangement 30 ausleitbar. To exchange the oil 18 between the shaft receiving area 15 , or between the storage area 17 and the recess arrangement 30 to allow that has at least one bearing element 16 at least one oil exchange opening 34 on, by means of which the oil 18 over the recess opening 32 between the recess arrangement 30 and the shaft receiving area 15 of the connecting rod 10 or the storage area 17 is interchangeable.

In addition, the bearing element 16 at least one ventilation opening 36 on, by means of which air over the recess opening 32 between the recess arrangement 30 and the shaft receiving area 15 is interchangeable.

The recess arrangement 30 also has a plurality of partial recess 38 . 40 42, which via respective overflow openings 34 . 46 fluidly connected to each other. Here are the Teileausnehmungen 38 and 40 over the overflow opening 44 and the partial recesses 40 and 42 over the overflow opening 46 fluidly connected.

The bearing element 16 towered over in, in 2 shown arrangement on the investment area 20 respective, opposite arrangement ends 48 . 50 the recess arrangement 30 in the circumferential direction 60 of the connecting rod eye 14 , The at least one bearing element 16 is present in the investment area 20 arranged that the oil exchange opening 34 at the first arrangement end 48 and the ventilation opening 36 at the second arrangement end 50 the recess arrangement 30 is arranged.

In summary, the present connecting rod allows 10 with the recess arrangement 30 a creation of a small oil reservoir, for example in the lower connecting rod bearing or in the lower connecting rod cap of the connecting rod 10 , wherein the individual partial recesses 38 . 40 . 42 can also be configured as respective grooves or as holes. The recess arrangement 30 can in engine operation of the internal combustion engine with the oil 18 be filled. When restarting the internal combustion engine, the oil 18 due to centrifugal forces and additionally or alternatively due to inertia from the recess arrangement 30 over the oil exchange opening 34 to the storage area 17 and thus to a bearing gap between the bearing element 16 and the shaft journal 22 arrive so that already at engine start sufficient supply of the shaft journal 22 and the storage area 17 with the oil 18 is enabled, even before an engine oil pressure of the internal combustion engine has reached a desired level.

Through the present connecting rod 10 For example, a wear rate at the connecting rod bearing (bearing element 16) can be significantly reduced even at high rotational speed gradients during start-stop operation of the internal combustion engine. As a result, an overall increased wear of the bearing element 16 be avoided, which can occur in conventional connecting rods, especially in the first engine revolutions and after a long downtime of the internal combustion engine. This increased wear on conventional connecting rods occurs, in particular, due to the fact that, when starting the internal combustion engine, respective oil passages are not sufficiently covered by an oil pump of the internal combustion engine with oil 18 are filled.

Through the present connecting rod 16 can be dispensed with alternative solutions, for example, an oil supply by means of accumulator or an electric oil pump to provide sufficient pre-oiling, which weight, space and cost can be saved.

LIST OF REFERENCE NUMBERS

10

pleuel

12

Pleuelgrundkörper

14

connecting rod

15

Shaft receiving area

16

bearing element

17

storage area

18

oil

20

plant area

22

shaft journal

30

recess arrangement

32

recess opening

34

Oil exchange opening

36

ventilation opening

38

partial recess

40

partial recess

42

partial recess

44

overflow

46

overflow

48

first arrangement end

50

second arrangement end

60

circumferentially

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19548756 A1 [0003]
• DE 102009000303 A1 [0004]

Claims (6)

Connecting rod (10) for an internal combustion engine, comprising a connecting rod main body (12), having at least one connecting rod eye (14) arranged in the connecting rod main body (12) and at least one bearing element (16) received in the connecting rod eye (14), 20) of the Pleuelgrundkörpers (12) is in abutment with this, characterized in that the Pleuelgrundkörper (12) at the contact area (20) has a recess arrangement (30) for storing oil (18) and for supplying a bearing surface (17) of the bearing element (16) with oil (18). Connecting rod (10) to Claim 1 , characterized in that the abutment region (20) completely surrounded by the at least one bearing element (16) covered recess opening (32) of the recess arrangement (30). Connecting rod (10) to Claim 2 , characterized in that the at least one bearing element (16) has at least one oil exchange opening (34), by means of which oil (18) via the recess opening (32) between the Ausnehmungsanordnung (30) and a shaft receiving portion (15) of the connecting rod (10) exchangeable is. Connecting rod (10) to Claim 3 , characterized in that the at least one bearing element (16) has at least one ventilation opening (36), by means of which air is exchangeable via the recess opening (32) between the recess arrangement (30) and the shaft receiving area (15). Connecting rod (10) according to one of the preceding claims, characterized in that the recess arrangement (30) has a plurality of partial recesses (38, 40, 42) which are fluidically connected to one another via respective overflow openings (44, 46). Connecting rod (10) according to one of the preceding claims, characterized in that the at least one bearing element (16) in its arrangement on the abutment region (20) respective, opposite arrangement ends (48, 50) of the recess arrangement (30) in the circumferential direction (60). the connecting rod eye (14) surmounted.

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