DE102018004060A1 - Venting device for an internal combustion engine, in particular of a motor vehicle - Google Patents

Abstract

The invention relates to a venting device (10) for an internal combustion engine (16), comprising at least one first venting channel (14) through which venting gas can flow from a crankcase and / or from an adsorption filter (18) of the internal combustion engine (10) ), which is fluidically connected to a corresponding, by the venting gas permeable second venting channel (34) of a separate from the connecting element (12) and mechanically connected to the connecting element (12) connected counterpart (32) of the internal combustion engine (10).

Description

The invention relates to a ventilation device for an internal combustion engine, in particular of a motor vehicle, according to the preamble of patent claim 1.

Such a venting device for an internal combustion engine, in particular a motor vehicle, for example, is already the DE 10 2016 005 972 A1 to be known as known. The venting device has at least one connecting element which has at least one first venting channel through which venting gas can flow from a crankcase and / or out of an adsorption filter of the internal combustion engine. The first venting channel is fluidly connected to a corresponding, through the venting gas permeable second venting channel of a separately formed from the connecting element and mechanically connected to the connecting element counterpart of the internal combustion engine. If the venting gas is venting gas from the crankcase, that is, from a crankcase of the crankcase, the venting gas is then also referred to as blow-by gas, the counterpart is for example an oil separator. By means of the oil separator contained in the vent gas oil can be separated from the vent gas.

Object of the present invention is to develop a venting device of the type mentioned in such a way that a particularly simple assembly and at the same time a particularly advantageous diagnosability can be guaranteed.

This object is achieved by a venting device having the features of patent claim 1. Advantageous embodiments with expedient developments of the invention are specified in the remaining claims.

In order to develop a venting device specified in the preamble of claim 1 type such that a particularly simple installation of the venting device and at the same time a particularly advantageous Diagnoseizierfähigkeit can be realized, it is according to the invention provided that the connecting element, which is preferably intrinsically stiff and / or integrally formed, a diagnostic port having a fluidically connectable to a diagnostic line or connected diagnostic channel having a mouth opening. About the mouth opening of the diagnostic channel opens into the first venting channel itself. In other words, when viewing the connecting element formed for example from a plastic per se, that is, in a state in which the connecting element is not connected to the counterpart and not to the diagnostic line, the diagnostic channel opens into the first venting channel via its mouth opening.

The counterpart has a longitudinal direction of extension and along the longitudinal extension direction in the first venting channel plugged connecting piece, which extends along its longitudinal direction over the mouth opening away. In this case, the second vent passage extends through the connection piece. In other words, the second venting channel extends through the connection piece. Since the connecting piece extends along its longitudinal direction over the mouth opening, along the longitudinal extension direction of the connecting piece, a first portion of the connecting piece is arranged on this side of the mouth opening and a second portion of the connecting piece beyond the mouth opening. For example, along the longitudinal extension direction of the connecting piece, a third portion of the connecting piece is arranged between the first portion and the second portion, wherein, for example, the third portion is arranged in at least partial overlap or overlap with the mouth opening. In a desired mounting state of the venting device, the mouth opening is on the side of the connecting piece on a first side of the mouth opening by means of the connecting piece and by means of the connecting element and for example by means of at least one on the one hand to the connecting piece and on the other hand supported on the connecting element first sealing member against an environment of the connecting piece and sealed the connecting element, so that, for example, no fluids, in particular no gases from the environment flow through the mouth opening and can flow into the diagnostic channel via the mouth opening or vice versa. The environment of the connecting piece and the connecting element is, for example, an environment of the internal combustion engine as a whole.

Furthermore, it is provided that in the desired mounting state, the mouth opening on the side of the connecting piece on one of the first side in the longitudinal direction of the connecting piece opposite the second side of the mouth opening by means of the connecting piece and by means of the connecting element and by means of, for example, on the one hand to the connecting piece and on the other the second sealing element supported on the connecting element is sealed against the first venting channel, so that in the nominal mounting state the venting gas flowing through the first venting channel is sealed can not flow through the mouth opening and into the diagnostic channel or that no fluids such as gases from the diagnostic channel can flow through the mouth opening in the first vent channel. Thus, since the mouth opening is sealed in the desired mounting state both with respect to the environment and with respect to the first vent channel and the second vent channel, the target mounting state can be determined by the diagnostic channel, in particular detected, and in particular monitored. The desired mounting state can be detected and monitored in particular by means of at least one pressure sensor. By means of the pressure sensor, for example, a pressure prevailing in the diagnostic channel is detected. If the pressure has a predefinable or predetermined desired value or if the pressure detected by means of the pressure sensor is within a predetermined or predefinable desired range, this can be used to deduce the desired mounting state. However, if the pressure detected by means of the pressure sensor and which prevails in the diagnostic channel exceeds or falls below a predefinable or predefined threshold value, for example, it can be concluded that the venting device does not have the desired nominal assembly state. If, for example, the diagnostic line is not correctly connected to the diagnostic connection and thus to the diagnostic channel, leakages can occur, for example, as a result of which the diagnostic channel is undesirably fluidly connected to the environment. If, for example, the connecting piece is not correctly inserted in the first venting channel, leaks can occur, as a result of which, for example, the diagnostic channel is fluidically connected to the surroundings and / or fluidically to the first venting channel via the outlet opening. The respective leakage causes the pressure prevailing in the diagnostic channel to fall below or exceed the threshold value, which can be detected by means of the pressure sensor. As a result, it is possible in this way to deduce a state of the venting device which is different from the desired nominal mounting state, so that a particularly advantageous diagnostic capability can be represented by means of the venting device. Furthermore, the venting device can be mounted in a particularly simple manner, since the diagnostic connection and thus the diagnostic channel are integrated into the connecting element, which is also referred to as a connector or connecting piece.

Since in the venting device according to the invention a particularly advantageous diagnostic capability can be realized, it can preferably be provided that the connecting element is reversibly releasably connected to the connecting piece. Furthermore, for example, the diagnostic line can be reversibly detachably connected to the diagnostic connection or connected and / or a separately formed from the connecting element and can be flowed through by the venting gas diagnostic line can be reversibly releasably connected to the connecting element. As a result, only very time-consuming and costly insoluble connections can be avoided.

The invention is based in particular on the following finding: According to the requirements for crankcase and tank vents, for example, each connector of a vent line must either be insoluble, or the connector can be reversibly releasably connected to a corresponding counterpart, but then the vent line their connection state with the counterpart must be able to be diagnosed. This makes vent lines bulky, unwieldy and complex, making them very difficult to install. The aforementioned problems and disadvantages can be avoided by means of the venting device according to the invention.

Diagnostic plug-in connections, in particular of vent lines, are already well known from the general state of the art and in particular from production vehicle production. Usually there are several lines attached to their counterparts on a common flange, for example, a media-carrying nozzle and a plug are used. Disadvantage of this is that the connection to the counterpart must be tolerated very tight in order to be both tight and mountable. Furthermore, a guide of the respective line, that is, a so-called line routing is only very limited, since the circumference of the line is inherently insoluble and completely assembled. Furthermore, accessibility for joining with fasteners must be ensured. In addition, known from the general state of the art snap connections as so-called VDA connection and quick connectors or SAE connection and SAE connector.

In order on the one hand to mount the venting device particularly simple and thus time and cost and on the other hand to realize a particularly advantageous diagnostic capability, it is inventively provided that, for example, the vent line is reversibly releasably connected to the connecting element also referred to as connector, the connector reversibly detachable the connection piece is inserted. As a result, the connecting piece is inserted along the longitudinal extension direction into the first venting channel and thus into the connecting element, whereby the second venting channel is fluidically connected to the first venting channel. Will the Connector plugged onto the connection piece, that the venting device comes in its nominal mounting state, the connecting element is tightly connected to its counterpart in the form of the connecting piece. This is to be understood in particular that the mouth opening is sealed on the described pages by means of the connecting piece against the environment against the ventilation channels.

For this purpose, the connecting element, for example, a Verrastungsring that engages behind the connection piece on the connection piece when plugging. The Verrastungsring can be solved destructively from the spigot, so that the connecting element can be solved completely non-destructive of the spigot. Thus, it is possible to dispense with further connecting elements. The diagnostic line is connected, for example, with the diagnostic connection by the diagnostic line is plugged, for example, to the diagnostic port, especially after the connecting element has been plugged onto the connection piece. As a result, the diagnostic line is blocked, for example. If the connector is not or can be plugged onto the connecting piece in such a way that the mouth opening on at least one of the sides described is not sealed against the environment or not against the ventilation channels, leakage occurs via the mouth opening and the diagnosis channel, in particular by means of of the pressure sensor, can be detected in the manner described. As a result of this leakage, a pressure change occurs in a diagnostic branch comprising the diagnostic channel, wherein the pressure change can be detected by means of the pressure sensor.

By means of the venting device according to the invention, such a flange connection can be realized so that tolerance requirements for such a flange connection comprising, for example, plastic components can be kept low in comparison to conventional solutions.

By means of the component, which represents a counterpart for the connector, only a single connection in the form of the connecting piece can be sufficient, so that the costs of the venting device can be kept to a particularly low level.

Since the connecting element is plugged onto the connecting piece or the connecting piece is inserted into the connecting element, the connecting element and the connecting piece via at least one connector, in particular reversibly releasably connected to each other. This connector requires only a small space and no additional fasteners, which cost and installation costs can be reduced compared to conventional solutions.

It has also proven to be particularly advantageous if an already provided sensor system of a tank ventilation is used to detect and monitor the diagnostic channel, in particular the pressure prevailing in the diagnostic channel. Thus, it is preferably provided that as the diagnostic line, with which the diagnostic channel is fluidly connected, as a designated as a vent line Regenerierleitung for regenerating the example formed as an activated carbon filter adsorption filter is used. The diagnostic line is thus, for example, a leakage air diagnostic line, which is also referred to as a leakage air line. The leakage air line is a line of the tank ventilation. By using the leakage air line as a diagnostic line, a sensor and thus a diagnosis of the tank ventilation, in particular a partial load tank ventilation can be used to monitor, for example, to diagnose a crankcase ventilation. In this case, for example, the vent line fluidly connected or connectable to the first vent passage is a crankcase vent line of a crankcase ventilation, so that the vent gas comes from the crankcase and thus for example also referred to as blow-by gas.

By using the venting device according to the invention indissoluble line connections can be avoided or the number of such insoluble line connections can be kept particularly low, and components for the realization of the venting device can be developed with particularly extensive degrees of freedom and thus cost. This has advantages for production, assembly, spare parts and for maintenance. In particular, it is possible to design lines and connections for the crankcase ventilation freely and much easier to install and / or replace in an assembly plant and in service or maintenance. The part size can be kept simple for the spare parts, since individual components can be exchanged. In workshops less installation effort will arise because possibly obvious components must not be dismantled to maintain or replace a faulty component.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing. The features and feature combinations mentioned above in the description and the following in the Description of figures mentioned and / or shown alone in the figures features and combinations of features can be used not only in the specified combination, but also in other combinations or alone, without departing from the scope of the invention.

• 1 ausschnittsweise eine schematische Schnittansicht einer erfindungsgemäßen Entlüftungseinrichtung gemäß einer ersten Ausführungsform;
• 2 ausschnittsweise eine weitere schematische Schnittansicht der Entlüftungseinrichtung in einem von einem Soll-Montagezustand unterschiedlichen Zustand;
• 3 ausschnittsweise eine schematische Schnittansicht der Entlüftungseinrichtung gemäß einer zweiten Ausführungsform;
• 4 ausschnittsweise eine schematische Schnittansicht der Entlüftungseinrichtung gemäß einer dritten Ausführungsform; und
• 5 eine schematische Darstellung der Verbrennungskraftmaschine mit der Entlüftungseinrichtung gemäß der dritten Ausführungsform.

The drawing shows in:

• 1 a sectional view of a schematic sectional view of a vent according to the invention according to a first embodiment;
• 2 a detail of another schematic sectional view of the venting device in a different state from a target mounting state;
• 3 a fragmentary sectional view of the venting device according to a second embodiment;
• 4 a sectional view of a schematic sectional view of the venting device according to a third embodiment; and
• 5 a schematic representation of the internal combustion engine with the venting device according to the third embodiment.

In the figures, the same or functionally identical elements are provided with the same reference numerals.

1 shows a detail of a schematic sectional view of a venting device 10 according to a first embodiment of an internal combustion engine of a motor vehicle, in particular of a trained example as a passenger car motor vehicle. The venting device 10 comprises at least one connecting element 12 , which is also referred to as a connector. The connecting element 12 is for example formed in one piece. Furthermore, the connecting element 12 For example, trained intrinsically stiff. It is also conceivable that the connector (connecting element 12 ) is formed of a plastic. For example, the connecting element 12 produced by plastic injection molding. The connecting element 12 has a first venting channel 14 on which of vent gas from a crankcase and / or from an example formed as an activated carbon filter adsorption filter of the internal combustion engine can be flowed through.

The internal combustion engine is for example off 5 recognizable and there with 16 designated, wherein the example formed as an activated carbon filter adsorption also in 5 recognizable and there with 18 is designated. The internal combustion engine 16 has a crankcase ventilation 20 on, by means of which the aforementioned venting gas, which in the case of crankcase ventilation 20 is also referred to as a blow-by gas or at least blow-by gas comprises, is removed from the crankcase, in particular from a crankcase of the crankcase.

The internal combustion engine 16 is also a tank 22 assigned, in which a liquid fuel for operating the internal combustion engine 16 is receivable. This is a tank vent 24 provided by means of which, for example, a volatile fuel constituents comprehensive gas from the tank 22 can be dissipated. That from the tank 22 discharged and also referred to as vent gas gas is the adsorption filter 18 fed and through the adsorption filter 18 directed. By means of the adsorption filter 18 The volatile constituents of the fuel are filtered out of the gas, so that excessive emissions of unburned hydrocarbons (HC) can be avoided. With increasing amount of gas, which by means of the adsorption filter 18 is filtered, one takes in the adsorption filter 18 absorbed amount of volatile fuel components or unburned hydrocarbons. To the amount of in the adsorption filter 18 At least to reduce absorbed unburned hydrocarbons, a vent gas such as air through the adsorption filter 18 passed. The purge gas, also referred to as regeneration gas, rinses at least a portion of the in the adsorption filter 18 absorbed unburned hydrocarbons from the adsorption filter 18 out. This is also called regeneration or regeneration of the adsorption filter 18 designated. This for regenerating the adsorption filter 18 used regeneration gas and the unburned hydrocarbons contained therein from the adsorption filter 18 For example, at least one combustion chamber of the internal combustion engine 16 so that excessive emissions of unburned hydrocarbons can be avoided. This includes the tank venting 24 a regeneration line 26 which is permeable by the regeneration gas and the unburned hydrocarbons received therein.

Furthermore, the venting device comprises 10 one separately from the connecting element 12 trained vent line 28 , which can be flowed through by the venting gas. In the present case is the vent line 28 Part of the crankcase breather 20 and is flowed through by the blow-by gas. Furthermore, it is conceivable that as the vent line 28 or instead of the vent line 28 the regeneration line 26 is used so that the regeneration line 26 a vent line which is used for regeneration or for venting the adsorption filter 18 used can be. Thus, for example, the previous and following versions of the vent line 28 also on the regeneration line 26 transferable and vice versa. The regeneration gas is thus a vent gas or the previously mentioned vent gas, since the regeneration gas for regeneration and thus for venting the adsorption filter 18 is being used. In particular, the regeneration gas may have at least air. Out 1 is recognizable that the vent line 28 a channel through which the ventilation gas can flow 30 having, which fluidly with the first vent passage 14 connected or connectable.

The venting device 10 also has a separate from the connector 12 trained counterpart 32 on. The counterpart 32 has one of the vent gas from the vent line 28 or from the channel 30 permeable second vent passage 34 on, which with the corresponding first venting channel 14 is fluidically connected. The counterpart 32 and the connecting element 12 are separately formed and mechanically interconnected components. By the feature that the components are mechanically connected to each other, it is to be understood that the components are held together or fixed relative to each other. However, the components are also fluidly interconnected because the venting channels 14 and 34 fluidly connected to each other. Overall, it can be seen that this is the channel 30 flowing vent gas from the channel 30 in the ventilation channel 14 and finally from the vent channel 14 in the ventilation channel 34 inflow and the venting channel 34 can flow through.

As in the present case, the vent line 28 is used to vent the crankcase so that the vent gas is present gas from the crankcase, is the counterpart 32 For example, an oil separator, by means of which oil contained in the vent gas can be separated from the vent gas. It shows 1 a first embodiment of the venting device 10 , wherein the first embodiment also in 2 is shown.

To now the venting device 10 to be able to assemble particularly easy and at the same time to ensure a particularly advantageous diagnostic capability, has the connecting element 12 a diagnostic connection 36 on which a diagnostic channel 38 with a mouth opening 49 having. The diagnostic channel 38 is fluidic with a diagnostic lead 40 connectable or connected. Out 1 is recognizable that the diagnostic line 40 a channel 42 which is fluidic with the diagnostic channel 38 connectable or connected. Thus, the diagnostic line 40 fluidic with the diagnostic channel 38 connectable or connected. In particular, is off 1 recognizable that the diagnostic line 40 separate from the diagnostic port 36 and thus separately from the connecting element 12 trained and fluidic with the diagnostic channel 38 connected is. In addition, the diagnostic line 40 reversible detachable mechanically with the diagnostic connection 36 and thus with the connecting element 12 connected. This is the diagnostic line 40 on the diagnostic connector 36 attached, which thus at least partially in the diagnostic line 40 , especially in the channel 42 , is plugged. Thus, for example, gas, which is the channel 42 flows through, into the diagnostic channel 38 inflow or vice versa.

It is also very good 1 recognizable that the diagnostic channel 38 over the mouth opening 49 in the first venting channel 14 flows into itself. This means that when viewing the fastener alone 12 the diagnostic channel 38 over the mouth opening 49 in the ventilation channel 14 empties. Under the sole consideration of the connecting element 12 is to be understood that the connecting element 12 is considered in a state in which the connecting element 12 not with the vent line 28 , not with the diagnostic line 40 and not with the counterpart 32 connected is.

The counterpart 32 has a diagnostic connection 44 on which one in 1 by a double arrow 46 having illustrated longitudinal direction of extension. The connecting piece 44 is along the longitudinal direction in the first vent passage 14 plugged in, with the connecting piece 44 along the longitudinal direction over the mouth opening 49 extends. The second venting channel 34 extends through the connection piece 44 therethrough.

1 shows the venting device 10 in a desired mounting state S , In this nominal mounting condition S is the connecting element 12 correctly with the connecting piece 44 connected, the vent line 28 is correct with the connector 12 connected and the diagnostic line 40 is correct with the diagnostic connector 36 connected. This is in the target mounting state S the mouth opening 49 on the side of the connecting piece 44 on a first page S1 the mouth opening 49 by means of the connecting piece 44 , by means of the connecting element 12 and by means of a first sealing element 48 against an environment 50 of the connecting element 12 , the connecting piece 44 , the vent line 28 and the diagnostic line 40 sealed. The sealing element 48 is formed from an elastomer. In particular, the sealing element 48 designed as an O-ring his. The sealing element 48 is on the one hand to the connecting element 12 and on the other hand on the connecting piece 44 supported.

Furthermore, the mouth opening 49 in the target mounting state S on the side of the connecting piece 44 and on one of the first pages S1 in the longitudinal direction of the connection piece 44 opposite or remote from the second side S2 the mouth opening 49 by means of the connecting piece 44 , by means of the connecting element 12 and by means of a second sealing element 52 against the ventilation channels 14 and 34 sealed. The previous and following versions of the sealing element 48 can readily on the sealing element 52 be transferred and vice versa. The sealing elements 48 and 52 are, for example, two separately formed components.

At the in 1 and 2 The first embodiment shown is the diagnostic channel 38 and the diagnostic line 40 or the channel 42 clogged. It is envisaged that in the desired mounting state S at least the diagnostic channel 38 and in the present case also a diagnostic chamber 54 comprehensive diagnosis volume 56 with which the diagnostic line 40 or the channel 42 via the diagnostic connection 36 fluidly connected or connected, on the side of the connection piece 44 at one in the first venting channel 14 inserted, outer peripheral side surface of the connection piece 44 ends.

Overall, it can be seen that the connecting element 12 there is a single connector in which the diagnostic port 36 , another connection 60 as well as an attachment B are integrated. About the connection 60 is the vent line 28 mechanically and fluidically with the connecting element 12 connected by the connection 60 at least partially in the vent line 28 , especially in the channel 30 , is plugged. In this case, the ventilation duct extends 14 through the connection 60 therethrough. The attachment B includes one through the connecting element 12 formed locking ring 62 , by means of which the connecting element 12 with the connecting piece 44 locked and thereby form-fitting on the connection piece 44 is fixed. For this purpose, behind or engages behind the Verrastungsring 62 a corresponding, on the connection piece 44 provided latch 64 , Compared to conventional solutions is thus only a single nozzle in the form of the connection piece 44 on the counterpart 32 required to the venting device 10 to assemble. All connections can be fastened or loosened without any additional connecting elements and without tools. In other words, preferably all compounds are detachable connections, that is, reversibly detachable connections, so that the vent line 28 , the diagnostic line 40 and the connecting piece 44 reversibly detachable with the connecting element 12 mechanically connected.

The locking ring 62 is also referred to as a snap ring and is a locking element, by means of which the connecting element 12 with the connecting piece 44 latched and thus mechanically to the connection piece 44 is fixed.

Overall, it can be seen that on the vent line 28 a medium in the form of the vent gas from the crankcase or the tank or the adsorption filter 18 in the counterpart 32 is passed, which may be formed for example as a clean air line. In this case, no media should come through unseeded cables to the outside. Therefore, a diagnosis is advantageous to detect whether at least one line is not plugged, that is, whether the venting device 10 in one of the target mounting state S different state is located. This can be done via the diagnostics line 40 respectively. This is the diagnostic line 40 , especially her channel 42 , subjected to an excess or negative pressure. Is the diagnostic line 40 not inserted or has, for example, the venting device 10 one of the target mounting state S different state, so is the diagnostic line 40 or the diagnostic channel 38 or the channel 42 open. This leads to a leakage, which leads to a pressure change, which in turn can be detected by means of at least one pressure sensor.

The venting device 10 is for example mounted in the following way: first, for example, the vent line 28 on the corresponding socket 60 plugged. Then the locking ring 62 with the connecting piece 44 locked. Here are the diagnostic line 40 or the channel 42 and the diagnostic port 36 or the diagnostic channel 38 still open, so that there may be a pressure change, also referred to as pressure deviation, especially in the diagnostic line 40 , Such an open state can be detected and thus detected by detecting the pressure change, for example by means of a pressure sensor, so that then it can be deduced that the venting device 10 one of the target mounting state S different state takes.

Will then, for example, the diagnostic line 40 plugged so that the venting device 10 the target mounting condition S occupies, so in the first embodiment, the diagnostic line 40 clogged. Thus, there is no pressure deviation, so for example one in the diagnostic channel 38 and thus in the channel 42 prevailing pressure, which is detected by the pressure sensor, assumes a desired target value.

2 shows the venting device 10 according to the first embodiment in one of the target mounting state S different condition F , In this state, also referred to as an error state F is, for example, the diagnostic line 40 correctly with the connecting piece 44 connected, however, is the connecting element 12 not quite on the connecting piece 44 plugged, that is not correctly mounted. In the consequence is the mouth opening 49 on the website S1 not against the environment 50 sealed, so the diagnostic line 40 is open. In particular, it comes in the area of the sealing element 48 to a leakage, which leads to a pressure deviation, which can be detected by means of the pressure sensor. This can affect the state F be inferred.

3 shows a second embodiment of the venting device 10 , In this second embodiment, in the target mounting state S the diagnostic channel 38 , in particular via the diagnostic chamber 54 Fluidic with one envelope volume 66 connected, which on the one hand by an outer peripheral side surface 68 at least one subarea T the vent line 28 and on the other hand, from an inner peripheral side surface 70 one at least the subarea T at a distance A surrounding envelope element 72 is limited. The vent line 28 and the wrapping element 72 thus form a double-walled pipe. If, for example, leakage of the vent line occurs 28 , so there is a pressure deviation or pressure change in the envelope volume 66 , Because the envelope volume 66 , in particular via the diagnostic chamber 54 , with the diagnostic channel 38 and above it with the canal 42 fluidly connected, which may be due to the leakage of the vent line 28 caused pressure change can be detected by means of the pressure sensor, so that then the leakage can be detected by means of the pressure sensor.

In contrast to the first embodiment, the diagnostic line 40 in the second embodiment, not clogged when connected to the diagnostic port 36 is added, but the diagnostic line 40 or her channel 42 is used with the envelope volume used as the diagnostic volume 66 fluidly connected. Thus the diagnosis volume ends 56 not on the outer peripheral side surface 68 but the diagnosis volume 56 includes, for example, the diagnostic channel 38 , the chamber 54 and the envelope volume 66 ,

Finally shows 4 a third embodiment. For example, in the third embodiment, the diagnostic channel 38 , In particular via a corresponding connector, also referred to as a connector 74 , fluidic with the regeneration line 26 connected. Thus, for example, lines and / or separation points of the crankcase ventilation 20 , which are to be stuck in a mounting or in a maintenance case, reversibly detachable executed and by means of the tank ventilation 24 be monitored and thus diagnosed. For this purpose, for example, a leakage air line 76 constructively designed so that it is closed in the correctly installed state, in particular on the separating points to be diagnosed. The leakage air line 76 is for example the diagnostic line 40 , By means of the tank ventilation 24 Both partial load tank venting and full load tank venting may be performed, which may be monitored.

The regeneration gas passes, for example, from the adsorption filter 18 via the regeneration line used as vent line 26 through a tank vent valve 78 to the internal combustion engine 16 or to the combustion chamber. Electricity from the tank ventilation valve 78 is a pressure sensor 80 installed, for example, a pressure prevailing in the tank ventilation, especially in the partial load tank ventilation or in the full load tank ventilation pressure, in particular via an intake manifold pressure and / or a Venturi system detected. The part load tank vent valve 48 is actively opened and closed during the diagnosis in partial load and full load. This results in a pressure jump, which by means of the pressure sensor 80 recorded and evaluated.

Now, for example, the diagnostic channel 38 over the leakage air line 76 or via the diagnostic line 40 fluidic with the regeneration line 26 is connected, in which the pressure sensor 80 can be arranged in the diagnostic channel 38 occurring pressure deviations or pressure changes by means of the pressure sensor 80 be recorded. As a result, leakage of the diagnostic channel 38 by means of the pressure sensor 80 be detected, which actually or basically for ventilation, in particular for full-load ventilation and / or partial load ventilation of the tank 22 is used. Thus, via the leakage air line 76 further separation points of the crankcase ventilation 20 be diagnosed for correct shoring. For example, is the vent line 28 the crankcase breather 20 not properly installed, it creates a bypass or leakage flow, which is based on the pressure during the venting of the tank 22 and thereby by means of the pressure sensor 80 can be detected. As a result, it can be detected that the vent 10 in one of the target mounting state S different state is located. However, if all lines are correctly installed, there will be no effect on the pressure during the venting of the tank 22 so that it can be concluded that the venting device 10 in the target mounting state S located.

LIST OF REFERENCE NUMBERS

10

vent

12

connecting element

14

first venting channel

16

Internal combustion engine

18

adsorption

20

crankcase ventilation

22

tank

24

tank ventilation

26

regeneration line

28

vent line

30

channel

32

counterpart

34

second venting channel

36

diagnostic connection

38

diagnostic channel

40

diagnostic line

42

channel

44

spigot

46

double arrow

48

first sealing element

49

mouth

50

Surroundings

52

second sealing element

54

diagnosis chamber

56

diagnosis volume

58

outer peripheral side surface

60

connection

62

snap-engagement ring

64

locking lug

66

envelope volume

68

outer peripheral side surface

70

Inner peripheral side surface

72

sheath member

74

connecting part

76

Leak air line

78

Tank ventilation valve

80

pressure sensor

A

distance

B

attachment

F

State

S

Target assembly state

S1

first page

S2

second page

T

subregion

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 102016005972 A1 [0002]

Claims (5)

Venting device (10) for an internal combustion engine (16), having at least one connecting element (12) which at least one of venting gas from a crankcase and / or from an adsorption filter (18) of the internal combustion engine (10) can be flowed through the first vent passage (14) is fluidically connected to a corresponding, by the venting gas permeable second vent passage (34) of a separate from the connecting element (12) formed and mechanically connected to the connecting element (12) connected counterpart (32) of the internal combustion engine (10), characterized in that the connecting element (12) has a diagnostic connection (36) which has a diagnostic channel (38) which can be connected fluidly with a diagnostic line (40) and has an orifice (49) via which the diagnostic channel (38) opens into the first venting channel (14); - the counterpart (32) has a longitudinal direction of extension (46), along the longitudinal direction (46) inserted into the first vent channel (14) and along the longitudinal extension direction (46) across the mouth opening (49) of time extending connecting piece (44), through which the second vent passage (34) extends; - In a target mounting state (S) of the venting device (10) the orifice (49) on the side of the connecting piece (44) on a first side (S1) of the mouth opening (49) by means of the connecting piece (44) and by means of the connecting element (12 ) against an environment (50) of the connecting piece (44) and the connecting element (12) is sealed; and - in the nominal mounting state (S) the orifice (49) on the side of the connecting piece (44) on one of the first side (S1) in the longitudinal direction (46) of the connecting piece (44) opposite the second side (S2) of the mouth opening (49 ) is sealed by means of the connecting piece (44) and by means of the connecting element (12) against the first venting channel (14). Venting device (10) according to Claim 1 , characterized in that in the nominal mounting state (S) a diagnostic volume (56) comprising at least the diagnostic channel (38), with which the diagnostic line (40) can be fluidically connected via the diagnostic connection (36), is provided on the side of the connecting piece (44). at one in the first vent passage (14) inserted, outer peripheral side surface (58) of the connecting piece (44) ends. Venting device (10) according to Claim 1 , characterized in that in the nominal mounting state (S) of the diagnostic channel (38) via the mouth opening (49) is fluidly connected to an enveloping volume (66) on the one hand by an outer peripheral side surface (68) of at least a portion (T) of a is delimited by a vent line (28) which is fluidically connected to the first venting channel (14) and can be traversed by the venting gas, and by an outer peripheral side surface (70) of an enveloping element (72) surrounding at least the partial region (T) at a distance (A). Venting device (10) according to any one of the preceding claims, characterized in that the diagnostic channel (38) is fluidly connected to a regeneration line (26) for regenerating the adsorption filter (18). Venting device (10) according to Claim 4 , characterized in that in the regeneration line (26) at least one pressure sensor (80) for detecting a in the regeneration line (26) and in the diagnostic channel (38) prevailing pressure is arranged.

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