DE102013113819B4 - combustion engine - Google Patents

Abstract

Internal combustion engine with a motor housing, with a crankshaft (11) and with a vibration damper (12), the vibration damper (12) being arranged inside the motor housing and coupled to the crankshaft (11), and the vibration damper (12) being oil-cooled is characterized in that the vibration damper (12) is used to dampen torsional vibrations of the crankshaft (11), and that an oil spray nozzle (16) sprays engine oil for cooling the vibration damper (12) in the direction of an inner wall (17) of a radially inner recess ( 18) of the vibration damper (12), with the inner wall (17) delimiting the radially inner recess (18) of the vibration damper (12) radially on the outside, and with rotational forces of the vibration damper (12) then driving the engine oil through cooling channels (20) of the vibration damper ( 12) promote.

Description

The invention relates to an internal combustion engine.

Combustion engines known from practice have an engine housing and several cylinders. Each cylinder of an internal combustion engine has a piston that is coupled to a crankshaft of the internal combustion engine. It is known from practice to dampen torsional vibrations of the crankshaft with the aid of a vibration damper. Such a vibration damper can be designed, for example, as a so-called viscous damper. In internal combustion engines known from practice, the vibration damper is arranged outside the engine housing and is coupled to the crankshaft outside the engine housing. Such a vibration damper is then cooled via ambient air.

DE 11 27 142 A discloses an internal combustion engine according to the preamble of claim 1.

KR 10 2003 0 031 724 A discloses further prior art.

Proceeding from this, the object of the present invention is to create a new type of internal combustion engine that requires little installation space and ensures effective cooling of the vibration damper.

This object is achieved by an internal combustion engine according to claim 1.

The oil-cooled vibration damper, which is located inside the engine housing and is coupled to the crankshaft, serves to dampen torsional vibrations in the crankshaft.

An oil spray nozzle sprays engine oil in the direction of an inner wall of a radially inner recess of the vibration damper to cool the vibration damper, with the inner wall delimiting the radially inner recess of the vibration damper radially on the outside, and with rotational forces of the vibration damper then conveying the engine oil through cooling channels of the vibration damper. With this, engine oil can be conveyed in a particularly simple and effective manner in the direction of the vibration damper and used for cooling the same, with little installation space required.

According to an advantageous development of the invention, the cooling channels extend in the radial direction through the vibration damper and convey the engine oil, starting from the radially outer inner wall of the recess of the vibration damper, in the direction of a radially outer outer wall of the vibration damper. This allows a simple and effective cooling of the vibration damper over its radial extension.

Preferably, on the radially outer inner wall of the radially inner recess of the vibration damper at an axial end of the same which faces away from a crankcase, a radially inwardly directed collar is formed, on which engine oil sprayed towards the inner wall of the recess can be collected. The collar can be used to prevent engine oil sprayed in the direction of the inner wall from running back from the interior before it reaches the cooling ducts.

Motor oil conveyed through the cooling channels in the direction of the radially outer outer wall of the vibration damper can preferably be collected in the area of the outer wall of the vibration damper and guided in the direction of an oil suction device.

This can prevent the oil conveyed through the cooling channels in the direction of the outer wall of the vibration damper from being sprayed in an undefined manner in the motor housing.

• 1 einen Ausschnitt aus einem Verbrennungsmotor im Bereich eines Schwingungsdämpers in perspektivscher Ansicht;
• 2 einen Querschnitt durch die Ansicht der 2; und
• 3 ein Detail der 2.

Preferred developments of the invention result from the dependent claims and the following description. Exemplary embodiments of the invention are explained in more detail with reference to the drawing, without being limited thereto. It shows:

• 1 a section of an internal combustion engine in the area of a vibration damper in a perspective view;
• 2 a cross section through the view of 2 ; and
• 3 a detail of 2 .

The invention relates to an internal combustion engine of a motor vehicle. Such an internal combustion engine has an engine housing, several cylinders and a crankshaft, with the pistons of the cylinders being coupled to the crankshaft. The motor housing comprises at least one crankcase 10 for accommodating and supporting the crankshaft and the pistons of the cylinders and a timing case cover, not shown, which adjoins the crankcase 10 and is firmly connected thereto.

1 until 3 show different views of a detail of an internal combustion engine according to the invention, wherein in 1 the crankcase 10 is shown, in which several not shown in detail pistons of the internal combustion engine are accommodated, these pistons of the combustion force machine are coupled to the crankshaft 11 of the internal combustion engine. From the crankshaft 11 is in 1 a section protruding from the crankcase 10 is shown.

A vibration damper 12 acts on this section of the crankshaft 11, which projects out of the crankcase 10 1 is coupled to the crankshaft 11 via a connecting device 13 . This vibration damper 12 is preferably a so-called viscous damper.

According to the invention, the vibration damper 12 is arranged within the motor housing and is connected to the crankshaft 11 within the motor housing, the vibration damper 12 being oil-cooled. The vibration damper 12 is arranged within a partial space of the engine housing defined by a wall of the crankcase 10 and the timing case cover (not shown).

To cool vibration damper 12 with the aid of engine oil, oil can be branched off from an engine oil circuit 15 in the direction of arrow 14 and fed to an oil spray nozzle 16, oil spray nozzle 16 spraying the engine oil for cooling vibration damper 12 in the direction of an inner wall 17 of a radially inner recess 18 of the Vibration damper 12 splashes.

This inner wall 17 delimits the radially inner recess 18 of the vibration damper 12 radially on the outside in the sense of a lateral surface delimiting the radially inner recess 18 on the outside.

The engine oil is then conveyed through cooling channels 20 of the vibration damper 12 by rotational forces of the vibration damper 12 which are caused by the rotation of the vibration damper 12 in the direction of the arrow 19 . The vibration damper 12 rotates together with the crankshaft 11.

The cooling channels 20 of the vibration damper 12 extend radially outwards in the radial direction through the vibration damper 12 and convey the engine oil, starting from the radially outer inner wall 17 of the radially inner recess 18 of the vibration damper 12, in the direction of a radially outer outer wall 21 of the vibration damper 12.

On the radially outer inner wall 17 of the radially inner recess 18 of the vibration damper 12, at an axial end thereof which faces away from the crankcase 10, there is a collar 22 directed radially inward, on which motor oil sprayed in the direction of the inner wall 17 of the recess 18 is catchable. Engine oil, which is accordingly sprayed via the oil spray nozzle 16 in the direction of the inner wall 17 of the recess 18, initially builds up an oil film of defined thickness on the inner wall 17, which is caught by the collar 22. Starting from the inner wall 17 , the oil then reaches the cooling channels 20 of the vibration damper 12 in order to be guided through them radially outward in the direction of the outer wall 21 of the vibration damper 12 .

The motor oil conveyed through the cooling channels 18 in the direction of the radially outer outer wall 21 of the vibration damper 12 can preferably be collected in the area of the outer wall 21 and can be directed in the direction of an oil suction device 23 . A device can be used for this purpose, which terminates radially on the outside at the outer wall 21 and surrounds the vibration damper 12 radially on the outside.

It is therefore within the meaning of the present invention to arrange a vibration damper 12 preferably designed as a viscous damper within an engine housing, to connect it to the crankshaft 11 within the engine housing and to cool the same within the engine housing with engine oil.

For this purpose, engine oil is sprayed via an oil spray nozzle 16 onto an inner wall 17 of a radially inner recess 18 of the vibration damper 12, with the engine oil being caught in the region of this inner wall 17 and, starting from the inner wall 17, being guided radially outwards via the cooling channels 20 to the outer wall 21 of the vibration damper 12 becomes.

The engine oil used to cool the vibration damper 12 is preferably collected in the area of the outer wall 21 and guided in a defined manner in the direction of the oil suction device 23 .

Reference List

10

crankcase

11

crankshaft

12

vibration damper

13

connecting device

14

arrows

15

engine oil circuit

16

oil spray nozzle

17

inner wall

18

recess

19

Arrow

20

cooling channel

21

outer wall

22

collar

23

oil suction

Claims (5)

Internal combustion engine with a motor housing, with a crankshaft (11) and with a vibration damper (12), the vibration damper (12) being arranged inside the motor housing and coupled to the crankshaft (11), and the vibration damper (12) being oil-cooled characterized in that the vibration damper (12) serves to dampen torsional vibrations of the crankshaft (11), and that an oil spray nozzle (16) sprays engine oil for cooling the vibration damper (12) in the direction of an inner wall (17) of a radially inner recess ( 18) of the vibration damper (12), with the inner wall (17) delimiting the radially inner recess (18) of the vibration damper (12) radially on the outside, and with rotational forces of the vibration damper (12) then driving the engine oil through cooling channels (20) of the vibration damper ( 12) promote. combustion engine after claim 1 , characterized in that the motor housing has a crankcase (10) and a timing case cover adjoining the crankcase (10), the vibration damper (12) being arranged within a partial space of the motor housing defined by a wall of the crankcase (10) and the timing case cover. combustion engine after claim 1 or 2 , characterized in that the cooling channels (20) extend in the radial direction through the vibration damper (12) and the engine oil starting from the radially outer inner wall (17) of the recess (18) of the vibration damper (12) in the direction of a radially outer outer wall (21) of the vibration damper (12). combustion engine after claim 1 , 2 or 3 , characterized in that on the radially outer inner wall (17) of the radially inner recess (18) of the vibration damper (12) at an axial end thereof, which faces away from the crankcase (10), a radially inwardly directed collar (22) is formed on which in the direction of the inner wall (17) of the recess (18) sprayed motor oil can be collected. combustion engine after claim 3 or 4 , characterized in that motor oil conveyed through the cooling channels (20) in the direction of the radially outer outer wall (21) of the vibration damper (12) can be collected in the area of the outer wall (21) of the vibration damper (12) and in the direction of an oil suction device (23) is conductive.

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