DE102018104034A1 - Internal combustion engine with crankshaft and roller bearings - Google Patents

Abstract

The invention relates to an internal combustion engine with a crankshaft (1) and a rolling bearing (2), wherein a crankshaft end (4) by the rolling bearing (2) is mounted.

Description

The invention relates to an internal combustion engine with a crankshaft and a rolling bearing.

The US9702410B2 discloses a system with a crankshaft and at least one rolling bearing.

The internal combustion engine according to the invention comprises a crankshaft and a rolling bearing, wherein a crankshaft end is supported by the rolling bearing.

The crankshaft end is an area of the crankshaft which, depending on the type of engine and the number of cylinders, extends over approximately 10% -30% of the length of the crankshaft and is positioned at the end of the crankshaft.

Crankshaft ends are often provided with pulleys, which are connected via a belt to a generator with a starter or a starter generator and possibly with an air conditioning compressor and / or a water pump. Starter generators often have belt tensioners. In such a configuration, which is often used in internal combustion engines, static and dynamic loads are exerted on the pulleys and thus on the crankshaft ends. These loads can result in mechanical bending of the crankshaft.

A bearing, in particular a roller bearing, which is located at the crankshaft end, can at least partially contribute to the compensation of these mechanical loads. This can effectively counteract a bending of the crankshaft, which can lead to increased stability of the crankshaft. This is advantageous because increased efficiency of the internal combustion engine and increased smoothness can be achieved. This advantage can also be used uncomplicatedly for existing combustion engines with little conversion effort.

The dependent claims describe further advantageous embodiments of the invention.

• 1 einem Schnitt durch eine Kurbelwelle mit einem Wälzlager und
• 2 eine schematische Übersicht über eine Kurbelwelle 1 mit einem über einen Riemen 7 verbundenen Startergenerator 8.

Preferred embodiments will be explained in more detail with reference to the following figures. It shows

• 1 a section through a crankshaft with a rolling bearing and
• 2 a schematic overview of a crankshaft 1 with a connected via a belt 7 starter. 8

1 shows a schematic representation of a section through an internal combustion engine with a crankshaft 1 and a rolling bearing 2 , where a crankshaft end 4 through the rolling bearing 2 is stored.

In this embodiment, the crankshaft end 4 an area of the crankshaft that is about 10% -30% of the length of the crankshaft 1 extends and at the end of the crankshaft 1 is positioned. Usually, a bearing of the crankshaft 1 in the middle of the crankshaft 1 , The middle of the crankshaft 1 is an area that extends over about 40% -80% of the crankshaft length and about the middle of the crankshaft 1 is positioned.

One, about the usual bearing of the crankshaft 1 in the middle of the crankshaft beyond bearing with a rolling bearing 2 at the crankshaft end 4 is advantageous because a bending of the crankshaft 1 can be prevented and / or reduced. This can lead to a higher efficiency of the internal combustion engine and increased smoothness.

In addition, the crankshaft points 1 at least one radial shaft seal 3 on, which is on the crankshaft 1 on the outside of the rolling bearing 2 located.

This is advantageous because leaks of, for example, lubricant from lubrication can be prevented and / or reduced.

In addition, the crankshaft has 1 via two radial shaft seals 3 , which on both sides of the rolling bearing 2 adjoin.

This is advantageous because, for example, a contamination of the rolling bearing 2 with fabrics from areas that are in an area of the crankshaft 1 not from the two radial shaft seals 3 is included, prevented and / or can be reduced.

In addition, such contamination of areas of the crankshaft 1 not from the two radial shaft seals 3 are included, with substances which are in and / or on the rolling bearing 2 be located, prevented and / or diminished.

In addition, the rolling bearing has 2 via a radial shaft seal 3 which are in the rolling bearing 2 is integrated.

This is advantageous since no additional space is required for an external seal. This can lead to an advantageous weight reduction of the internal combustion engine.

In addition, the rolling bearing 2 a lubrication on.

This is advantageous because friction, which in the rolling bearing 2 occurs, can be minimized. For example, minimized friction losses can lead to an advantageously increased efficiency of the internal combustion engine. Another advantage here may be the use of lubrication, which may be independent of the lubrication of the crankshaft. Thus, the lubrication for the rolling bearing 2 be selected optimized. This can result in more optimal lubrication.

In addition, the lubrication is designed as maintenance-free lubrication.

Replenishment and / or replacement of a lubricant is usually costly. These costs can be avoided since no lubrication or replacement is necessary for maintenance-free lubrication.

2 shows a schematic overview of a crankshaft 1 being a crankshaft end 4 with a starter generator 5 over a belt 7 connected is. In this embodiment, the connection of the crankshaft end 4 to the belt 7 via one on the crankshaft end 4 attached pulley 8th educated. In addition, the starter generator includes 5 a belt tensioner 6 ,

The internal combustion engine according to the invention is particularly advantageous in this frequently occurring configuration. Through the belt 7 who is the starter generator 5 with the pulley 8th at the crankshaft end 4 connects, mechanical stresses occur, for example in the direction 9 on which among other things on the crankshaft end 4 Act. These forces can result in unwanted bending of the crankshaft 1 result. Preventing and / or reducing this distortion can increase the efficiency and smoothness of the internal combustion engine.

In addition, this configuration is used in many internal combustion engines, which can provide high practical utility of the invention.

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

• US 9702410 B2 [0002]

Claims (7)

Internal combustion engine with a crankshaft (1) and a rolling bearing (2), wherein a crankshaft end (4) by the rolling bearing (2) is mounted. Internal combustion engine Claim 1 wherein the crankshaft (1) has at least one radial shaft seal (3) which is located on the crankshaft (1) on the outside of the rolling bearing (2). Internal combustion engine according to one of the preceding claims, wherein the crankshaft (1) has two radial shaft seals (3) which adjoin the rolling bearing (2) on both sides. Internal combustion engine according to one of the preceding claims, wherein a radial shaft seal (3) in the rolling bearing (2) is integrated. Internal combustion engine according to one of the preceding claims, wherein the rolling bearing (2) has a lubrication. Internal combustion engine Claim 5 , wherein the lubrication is designed as maintenance-free lubrication. Internal combustion engine according to one of the preceding claims with a starter generator, wherein the crankshaft end (4) with the starter generator (5) is connected.

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