DE102005061477B4 - Device for oil separation - Google Patents

Abstract

Device for separating oil, comprising an oil separator (4) to which raw gas can be supplied by an internal combustion engine and the clean gas separated from the raw gas can lead to the internal combustion engine (1), wherein an oil return channel (8) with the oil separator (4) the internal combustion engine (1) connects and the oil return channel (8) has a valve (10), wherein the valve (10) with the oil pressure of the internal combustion engine (1) is in operative connection, such that when the internal combustion engine (1) by the valve ( 10) the oil return channel (8) is closed and when the internal combustion engine (1) the oil return channel (8) is opened, characterized in that the valve (10) in an oil filter module (12) is arranged and that the oil filter module (12) as a Oil filter receptacle (13) formed inlet and formed as a return passage outlet, which communicate through a passage (14) of the oil filter module (12) with each other, the Du passage (14) with a control channel (11) is in communication, which is in operative connection with the valve (10).

Description

The The invention relates to a device according to the preamble of the claim 1.

In an internal combustion engine of a motor vehicle arise as a combustion product of air and fuel fumes, which are the most diverse Assemble components. The combustion chamber is indeed through piston rings against the crankcase, in which the crankshaft and the connecting rods run, sealed. The combustion gases can However, partly despite this seal on the piston rings in the crankcase escape. These escaping fractions are referred to as blow-by gases. Among other things, they contain fuel residues as well as water vapor and take on the cylinder walls and in the crankcase additionally oil on. In order to in the crankcase no overpressure occurs and the oil free of water and fuel, the crankcase is vented and sucked off these gases.

The extracted gases pass through an oil separator, so that the contained oil is separated and can be collected in a reservoir. The purified gas can from the oil separator leak out and then over a pressure relief valve fed back to the air intake. The collected oil will over an oil return channel to the oil pan returned to the internal combustion engine.

During the Operating the internal combustion engine, the pressure in the crankcase is greater than in the reservoir of the oil separator. The pressure difference arises on the one hand by the path to be covered the gases to the oil separator and additionally, inherently through the separation process itself. The pressure difference can cause Blow-by gases and possibly oil from the Crankcase over the oil return passage can penetrate into the reservoir, the oil separator overrun by it let oil and in the worst case flows into the suction pipe.

ends the oil return channel under the oil level in the oil pan, is subject to the end of the oil return channel dynamic driving influences, especially for fast cornering. The oil is thereby through the accelerations to the edge of the oil sump pressed so maybe the oil return channel not more in the oil ends, but freely throughout for blow-by gases becomes. Furthermore, it is usually costly, such a channel in To accommodate space.

has the oil return channel For example, a siphon on to prevent blow-by gases through the oil return passage it can freeze because it is in the siphon always a certain backlog, which can freeze by the water content in the blow-by gas or at longer service life viscous until can become clogging and thus the function of the device not sure in the long run.

Becomes the oil not below the oil level in the oil pan has to be returned a discontinuous reflux take place, d. h., while In the operation of the internal combustion engine, oil becomes a reservoir of the oil separator collected, which then emptied at standstill of the internal combustion engine becomes.

It Here is the use of check valves However, due to mechanical vibrations and pressure pulsations not reliable work. Thus, for example, has a designed as a plate valve an insufficient one Sealing effect on. The tile the sealing function in this design can only have a small sealing edge guarantee, otherwise it will cause adhesion and in the long term would come to a bonding of the valve, the by residues in the Blow-by gases are caused. There are also pressure pulsations and Vibrations that occur due to the driving dynamics and the sealing effect adversely affect the platelet into high-frequency vibrations is offset.

From the publication DE 40 37 803 A1 a device for oil separation is known, which has an oil return passage with a valve disposed therein. The valve operates oil pressure controlled such that it closes the oil return passage while the internal combustion engine is running and releases it when the internal combustion engine is stationary.

Farther is from the publication "Klöpfer, M. u. a .: Oil filter modules with solid plastic oil filter in Audi V6 and V8 diesel engines. In: MTZ - Motortechnische Zeitschrift. ISSN 0024-8525. 2005, Jg. 66, No. 10, pp. 768-774 "the formation of oil filter modules with all-plastic oil filters known, among other things, an oil separator integrated in an oil filter module is shown. The oil separator has an outlet for oil, the to the crankcase one Internal combustion engine leads.

Of the Invention has for its object to provide a device at the oil return channel reliable while the operation of the internal combustion engine is closed and at standstill open is.

The inventive solution this Task is the characterizing features of the main claim. Advantageous embodiments of the invention describe the subclaims.

The invention is based on the fact that the valve hydrau over the oil pressure of the internal combustion engine is switched. Since the oil pressure rests exclusively during operation of the internal combustion engine, a constant lock during operation and a Entrieglung the valve after switching off the engine is secured. The oil pressure also allows high operating forces that prevent jamming, for example. By pollution.

there it is envisaged that an oil filter module next to an oil filter intake one hydraulically by the oil pressure switched valve has that during operation of the internal combustion engine the oil return channel closes and at standstill of the internal combustion engine opens the oil return passage. there is the oil filter module formed such that the oil return passage in an oil return of the oil filter module ends, by the oil when replacing or replacing an oil filter cartridge enter the crankcase can.

By the position of the valve in the oil filter module Freezing is prevented because the temperatures in the oil filter module due to its close installation on the internal combustion engine quickly uncritical level. Furthermore, space is saved as free Volume in the oil filter module or housing is being used.

One embodiment The invention will be explained below with reference to the drawings. Show it:

1 a schematic functional representation of a device according to the invention,

2 a perspective view of an oil filter module,

3 a sectional view from below through an oil filter module, and

4 a sectional view of a valve in the oil filter module.

It will be initially on the 1 Referenced.

An internal combustion engine 1 a motor vehicle, for example. A car, has a crankcase 2 on, in the crankshaft, connecting rod and piston (not shown) of the internal combustion engine 1 are arranged. The internal combustion engine 1 has a crude gas line 3 for venting the crankcase 2 on, with the raw gas, so-called blow-by gases, which may contain oil, water vapor and fuel residues, an oil separator 4 can be supplied.

In the oil separator 4 Oil residues can be separated from the raw gas and stored in a reservoir 5 of the oil separator 4 to be collected. Purified raw gas, so-called clean gas, can via a clean gas line 6 having a pressure relief valve (not shown), again an intake pipe 7 the internal combustion engine 1 be supplied.

From the reservoir 5 of the oil separator 4 leads an oil return channel 8th back to the internal combustion engine 1 above the oil level (not shown) of an oil pan 9 the internal combustion engine 1 in the crankcase 2 empties. The oil return channel 8th has a valve 10 on, which is designed as a hydraulically actuated valve. The valve 10 stands with the oil pressure in the crankcase 2 via a control channel 11 (partially shown by dashed line) in connection, such that the valve 10 the oil return channel 8th locks when the during operation of the internal combustion engine 1 prevailing oil pressure is applied.

During operation of the internal combustion engine 1 Raw gas flows through the crude gas line 3 in the oil separator 4 in which oil residues are separated from the raw gas. The clean gas separated from the raw gas is passed through the clean gas line 6 the suction pipe 7 the internal combustion engine 1 fed while oil remains in the reservoir 5 of the oil separator 4 collect. The oil residues in the reservoir 5 However, during operation of the internal combustion engine 1 not through the oil return channel 8th drain, because the valve 10 locks because of the oil pressure in the crankcase 2 the oil return channel 8th from.

Will the internal combustion engine 1 stopped, the oil pressure in the crankcase takes 2 off, so the valve 10 the oil return channel 8th opens and oil residues automatically, for example by weight, from the reservoir 5 to the oil pan 9 in the crankcase 2 can reach. Once the internal combustion engine 1 is put back into operation, builds in the crankcase 2 an oil pressure that causes the valve 10 again the oil return line 8th closes.

It will now be on the 2 to 4 Referenced.

An oil filter module 12 an internal combustion engine (in the 2 to 4 not shown) has at its top (see 2 ) an oil filter intake 13 for receiving an oil filter cartridge (not shown). Here is the oil filter module 12 designed such, by an oil filter cartridge cleaned and during operation under pressure oil through a passage 14 (please refer 4 ) inside the oil filter module 12 flows and the oil filter module 12 through a return channel (not shown) leaves again. Furthermore, the oil filter module 12 an oil return 15 up, which has three functions. First, the oil return forms 15 a drainage channel with an oil filter cartridge change, so that oil from the oil return 15 in the oil pan 9 (in the 2 to 4 not shown), secondly, the oil return is used 15 with stationary internal combustion engine as a drainage channel for the oil separator 4 (in the 2 to 4 not shown) separated oil, and third, during operation of the internal combustion engine, the oil return 15 a drainage leak of the valve 10 (in the 2 to 4 not shown) ready. Finally, the oil filter module 12 a connecting piece 16 on to the connection for the one from the reservoir 5 coming oil return channel 8th is trained.

In connection with the passage 14 is the control channel 11 (please refer 2 and 4 ), which can be designed as a tap hole, and in which also oil can penetrate and with a screw plug 17 is closed. The control channel 11 also has a bore 18 on which is a connection from the control channel 11 with the valve 10 forms.

In this case, the valve has 10 a hollow piston 19 with an interior 20 on, in the oil through the hole 18 from the control channel 11 can penetrate. The hollow piston 19 of the valve 10 has, for example, a stroke of 2 mm and is by means of an example. As a helical spring 21 trained spring element resiliently biased, such that in the in 4 shown position, so when the internal combustion engine 1 , the valve 10 is open. In this position, as described above, oil from the reservoir 5 a connected oil separator 4 through one to the connecting piece 16 connected oil return channel 8th past the hollow piston 19 through the oil return 15 back to the oil pan 9 an internal combustion engine 1 stream.

During operation of the internal combustion engine 1 on the other hand, oil flows below that during operation of the internal combustion engine 1 lying pressure, through the passage 14 and in the control channel 11 from which it passes through the hole 18 in the interior 20 of the hollow piston 19 arrives. This will cause the hollow piston 19 from the in 4 shown position shifted so that in conjunction with the oil return passage 8th standing connecting pieces 19 is locked and no oil from the reservoir 5 in the oil pan 9 can flow.

1

Internal combustion engine

2

crankcase

3

raw gas

4

oil separator

5

reservoir

6

Clean gas line

7

suction tube

8th

Oil return passage

9

oil pan

10

Valve

11

control channel

12

Oil filter module

13

Oil filter mount

14

passage

15

Oil return

16

spigot

17

Screw

18

drilling

19

hollow piston

20

inner space

21

coil spring

Claims (7)

Device for oil separation, comprising an oil separator ( 4 ), of an internal combustion engine ( 1 ) Raw gas can be supplied and separated from the raw gas clean gas to the internal combustion engine ( 1 ), wherein an oil return channel ( 8th ) the oil separator ( 4 ) with the internal combustion engine ( 1 ) and the oil return channel ( 8th ) a valve ( 10 ), wherein the valve ( 10 ) with the oil pressure of the internal combustion engine ( 1 ) is in operative connection, such that when the internal combustion engine is running ( 1 ) through the valve ( 10 ) the oil return channel ( 8th ) is closed and with stationary internal combustion engine ( 1 ) the oil return channel ( 8th ), characterized in that the valve ( 10 ) in an oil filter module ( 12 ) and that the oil filter module ( 12 ) as an oil filter intake ( 13 ) formed inlet and formed as a return passage outlet which through a passage ( 14 ) of the oil filter module ( 12 ), the passage ( 14 ) with a control channel ( 11 ) which is in operative connection with the valve ( 10 ) stands. Device according to claim 1, characterized in that the valve ( 10 ) is hydraulically actuated. Device according to claim 1 or 2, characterized in that valve ( 10 ) is resiliently biased, such that when stationary internal combustion engine ( 1 ) the valve ( 10 ) is open. Device according to one of claims 1 to 3, characterized in that the oil separator ( 4 ) a reservoir ( 5 ), in which oil separated from the crude gas can be collected, wherein the oil return channel ( 8th ) the reservoir ( 5 ) with the internal combustion engine 1 combines. Apparatus according to claim 4, characterized in that the device for discontinuous emptying of the reservoir ( 5 ) is trained. Device according to one of claims 1 to 5, characterized in that the oil return channel ( 8th ) above an oil level of an oil pan ( 9 ) of the Internal combustion engine ( 1 ) opens. Device according to one of claims 1 to 6, characterized in that the oil filter module ( 12 ) a connecting piece ( 16 ) for connection to the oil return channel ( 8th ), wherein the connecting piece ( 16 ) a connection with an oil return ( 15 ) can form.