阅读说明：本技术 引导流体的元件直接或间接在压缩机的壳体处的布置 (Arrangement of fluid-conducting elements directly or indirectly at the housing of a compressor ) 是由 J.科赫 M.金斯特纳 于 2019-09-06 设计创作，主要内容包括：本发明涉及一种引导流体的元件(10)直接或间接在压缩机(16)的壳体(14)处的布置,其中,引导流体的元件(10)导引流动地与压缩机(16)相连接,其中,设置有带有探测孔(26)的单独的探测管路(24)并且引导流体的元件(10)具有至少一个用于封闭探测孔(26)的器件(38),其在指定-装配位置中封闭探测孔(26),并且其中,为了探测在探测管路(24)中的压力设置有至少一个压力传感器。(The invention relates to an arrangement of a fluid-conducting element (10) directly or indirectly at a housing (14) of a compressor (16), wherein the fluid-conducting element (10) is connected in a flow-conducting manner to the compressor (16), wherein a separate detection line (24) having a detection opening (26) is provided and the fluid-conducting element (10) has at least one means (38) for closing the detection opening (26), which closes the detection opening (26) in a predetermined assembly position, and wherein at least one pressure sensor is provided for detecting a pressure in the detection line (24).)

1. An arrangement of a fluid-conducting element (10) directly or indirectly at a housing (14) of a compressor (16), wherein the fluid-conducting element (10) is connected in a flow-conducting manner to the compressor (16), characterized in that a separate detection line (24) with a detection bore (26) is provided and the fluid-conducting element (10) has at least one means (38) for closing the detection bore (26), which closes the detection bore (26) in a predetermined assembly position, and wherein at least one pressure sensor is provided for detecting a pressure in the detection line (24).

2. The arrangement according to the preceding claim, characterized in that the fluid-conducting element (10) is a suction hood (12), an element with a venturi nozzle and/or an element with a valve.

3. An arrangement according to any one of the foregoing claims, characterised in that the detection line (24) is flow-conducting connected with a pressure pipe arranged downstream of the compressor (16).

4. Arrangement according to one of the preceding claims, characterized in that a passage opening (32) is provided in the housing (14) of the compressor (16), which is connected in a flow-conducting manner to the detection opening (26) of the detection line (24), wherein the at least one means (38) for closing closes off the passage opening (32) in the assigned-fitting position.

5. An arrangement according to any one of the preceding claims, characterised in that as at least one means (38) for closing a pin-like element (40) is provided which engages into the detection bore (26) or into the passage bore (32).

6. An arrangement according to any one of the preceding claims, characterised in that a double-walled line is provided, which has a first part-line (28) and a second part-line (30), and wherein one of the two part-lines (28, 30) is the probe line (24).

7. The arrangement according to the preceding claim, characterized in that the double-walled pipe is a crankcase ventilation pipe (22) and one of the two partial pipes (28, 30) is provided for through-flow of blow-by gas.

8. An arrangement according to claim 6, characterised in that the double-walled pipe is a tank ventilation pipe and one of the two part-pipes (28, 30) is provided for through-flow of tank gas.

9. An arrangement according to any one of the preceding claims, characterized in that the pressure sensor is arranged in the pressure pipe downstream of the compressor (16) and/or in the suction pipe (20) upstream of the compressor (16).

10. An arrangement according to any of the preceding claims, characterized in that the fluid-conducting element (10) is made of plastic.

Technical Field

The invention relates to an arrangement of a fluid-conducting element directly or indirectly at the housing of a compressor. The invention relates in particular to an internal combustion engine with such an arrangement. The invention further relates in particular to a motor vehicle having such an arrangement.

Background

DE 102011104424 a1 discloses a motor vehicle device with at least one flow-technical connection unit, wherein the connection unit is provided to releasably connect two pipe parts, which are fixedly connected to each other, to a third pipe part. The motor vehicle device furthermore has a diagnostic unit with a pressure sensor, wherein the pressure sensor is provided to detect the pressure in the two interconnected pipes. The connection unit has a diagnostic opening which, in the event of a faulty assembly of the connection unit at the third pipe, opens at least the pipe detected by the pressure sensor to the surroundings. The diagnostic opening can be closed, in particular, by a housing of the exhaust gas turbocharger, in which a third line is also formed.

An on-board diagnostic device for a motor vehicle is known from DE 102010012913 a1 for detecting incorrect installation of a ventilation line. The ventilation line is connected to a separate connection unit for connecting the ventilation line to a suction line (ansaugeitung). Furthermore, a diagnostic line is connected to the ventilation line, which is opened in the event of an incorrect assembly of the ventilation line.

Disclosure of Invention

The object of the invention is to provide an arrangement of a fluid-conducting element directly or indirectly at the housing of a compressor, by means of which a proper assembly of the fluid-conducting element can be checked in a particularly simple manner and with less installation space required.

The solution of this object is achieved according to the invention with the features of the independent claims. Further practical embodiments and advantages of the invention are specified in the dependent claims.

The invention relates to an arrangement of a fluid-conducting element directly or indirectly at the housing of a compressor, in particular of an exhaust gas turbocharger. The fluid-conducting element is in particular a suction hood (ansaugustze), which is directly connected to the compressor. Alternatively, the fluid-conducting element is indirectly connected to the compressor via an adapter. The flow-conducting element is connected to the compressor in a flow-conducting manner. Furthermore, a separate detection line (Detektionsleitung) with a detection bore is provided, and the fluid-conducting element has at least one means for closing the detection bore, wherein the at least one means for closing closes the detection bore in the assigned installation position. In particular, a "plug-type" element is suitable as a means for closing, preferably with a separate seal, in particular with an O-ring. At least one pressure sensor is provided for detecting the pressure in the detection line.

The pressure in the test line in the specified installation position of the fluid-conducting element at the compressor corresponds to the known reference pressure. As is also implemented below, the reference pressure corresponds in particular to the pressure in the pressure line downstream of the compressor, which varies depending on the operating phase of the internal combustion engine and in particular depending on whether the internal combustion engine is operated in suction operation or in turbine operation. The individual detection lines are therefore not acted upon by pressure from the fluid-conducting element, but rather are in flow-conducting connection with a further pressure source, which is not dependent on the fluid-conducting component. This can be caused if the fluid-conducting element is incorrectly fitted to the compressor or if a component fails, when the actual fitting position is shifted from the target fitting position and the detection opening of the detection line is not closed, in particular not hermetically closed, so that gas or an increased amount of gas can escape from the detection line via the detection opening. The pressure drop associated therewith or a lower pressure relative to a reference pressure is detected by means of a pressure sensor. The detection of such a pressure is transmitted in particular to a control unit and a corresponding signal is emitted to the vehicle driver and/or the factory.

In general, the arrangement according to the invention enables the connection between the fluid-conducting element and the compressor to be checked for a given assembly position. The connection between the fluid-conducting element and the compressor and/or between the fluid-conducting element and an adapter provided for indirectly joining the fluid-conducting element to the compressor and the compressor can be checked accordingly. The inspection is particularly simple and the arrangement according to the invention requires less installation space, since it enables the use of already existing inspection devices, as will be explained in more detail below in conjunction with the dependent claims.

The checking of the designated installation position is therefore particularly important, since the gas containing waste gas or containing tank gas can flow in the fluid-conducting element and the compressor connected thereto in a flow-conducting manner. With the arrangement according to the invention it is possible to detect directly when the connection between the fluid-conducting element and the compressor is no longer functional and the gas in question can thus reach the surroundings (atmosphere).

As mentioned above, the fluid-conducting element is in particular a suction hood. But also elements with venturi nozzles (venturi nozzles) and/or elements with valves. The fluid-conducting element can also be an adapter which connects the suction hood, the element with the venturi nozzle and/or the element with the valve to the compressor. The aforementioned fluid-conducting elements are often arranged to be flow-conducting connected to the compressor and to be flowed through by a gas containing tank gas or waste gas. In this connection, the arrangement according to the invention makes it possible to check the specified installation position of these flow-guiding elements.

In a practical embodiment, the detection line is connected to a pressure line arranged downstream of the compressor in a flow-conducting manner. The reference pressure in the test line (which is used to check the specified installation position) therefore corresponds to the pressure prevailing in the pressure line. In other words, the probe line is loaded with pressure from the pressure tube. In this connection, already existing pressure sources are used, which are independent of the fluid-conducting element, and the arrangement of possible additional pumps can be dispensed with. Different pressures exist in the pressure pipe depending on the operating phase. In purely aspirated operation of the internal combustion engine, in particular in low-load conditions, the pressure in the pressure line is lower than in turbine operation (in which the aspirated air is compressed by means of the compressor). In this case, the respective reference pressure is determined by the control unit as a function of the engine characteristic field or the reference pressure is stored in the control unit for different operating points in the engine characteristic field of the internal combustion engine, so that deviations of this pressure from the currently existing reference pressure, for example caused by an open detection bore, can be detected.

In a further practical embodiment, a passage opening (durchgangsoeffung) is provided in the housing of the compressor, which is connected in a flow-conducting manner to the detection opening of the detection line. The test line opens into the through-opening, in particular at the end of the test line, at which the through-opening is formed. The at least one means for closing closes the passage opening in the assigned mounting position. Preferably, the means for closing sealingly closes the passage hole. Thereby, the detection hole is indirectly closed via the closed through hole. Such a configuration of the passage opening is advantageous for situations in which the detection line is already connected to the housing of the compressor, and the passage opening is a particularly space-saving solution in which the means for closing indirectly close the detection opening. The passage opening can be embodied as a bore in the housing of the compressor particularly cost-effectively.

In particular, as the at least one means for closing, a pin-like element is provided which engages in the detection or passage opening in the assigned mounting position. The pin-like element closes the probe hole or the through hole accordingly in the manner of a "plug". The pin-like element protrudes in particular with respect to the adjacent region of the fluid-conducting element. In order to seal off the detection or passage opening, a sealing element, for example an O-ring, is arranged in particular on the pin element. The pin element serves in particular at the same time for positioning the fluid-conducting element at the housing of the compressor, so that the pin element fulfills both functions at the same time, as a result of which costs and material can be saved.

In a particularly space-saving embodiment of the arrangement according to the invention, a double-walled line is provided, which has a first part line and a second part line. One of the two parts-the line-is the probe line. By using already existing lines, which are associated with the second part line, the number of components used and in particular the required installation space is reduced.

The double-walled line is in particular a crankcase ventilation line and one of the two partial lines is provided for the throughflow of Blow-by Gas (Blow-by-Gas). Alternatively, the double-walled line is the tank ventilation line and one of the two partial lines (which is provided for the through-flow of tank gas). Both the crankcase ventilation line and the tank ventilation line are usually lines which are connected to the compressor, and the blow-by gas or the tank ventilation gas is passed upstream of the compressor in the region of the fluid-conducting element. It is already known to form the crankcase ventilation line and the tank ventilation line as double walls and to use one of these two part lines as a detection line for the respective other part line. The existing structure of the double-walled line is used accordingly in order to additionally check the intended installation position of the fluid-conducting component at the compressor. In particular, the existing checking possibility for the crankcase ventilation line or the tank ventilation line is used in order to additionally check the correct assembly of the fluid-conducting element indirectly or directly at the compressor. The double-walled pipe line is in particular an inner first pipe line and a second pipe line surrounding it over a part or the entire circumference, wherein the tank gas is conducted through the inner first pipe line. The second line is then preferably additionally used as a detection line.

In a further practical embodiment, a pressure sensor is arranged in the pressure line downstream of the compressor and the detection line is connected to the pressure line in a flow-conducting manner. Alternatively or additionally, a pressure sensor is arranged upstream of the compressor in the suction line and the detection line is connected to the suction line in a flow-conducting manner. In order to further save costs, existing pressure sensors are therefore used for monitoring the pressure in the detection line. In the actual assembly position, which is offset from the intended assembly position such that the detection opening is no longer closed, gas escapes through the detection opening, which leads to a pressure drop in the pressure line and/or in the evacuation line and is accordingly detected by the pressure sensor arranged there.

The fluid-conducting element is at least partially made of plastic and can therefore be produced particularly cost-effectively in high quantities. The arrangement according to the invention is particularly advantageous in the case of a fluid-conducting element made of plastic, since components made of plastic, depending on the material, can easily become brittle and then suddenly fail, even after a long service life. Such a failure can be reliably detected with the arrangement according to the invention.

Drawings

Further practical embodiments of the invention are described below with reference to the single drawing. Wherein:

fig. 1 shows an arrangement according to the invention in a sectional view.

List of reference numerals

10 fluid-conducting element

12 suction hood

14 casing

16 compressor

18 bolt

20 suction tube

22 crankcase ventilation line

24 detection pipeline

26 probing hole

28 first part line

30 second part line

32 through the hole

34 connecting surface

36 connecting surface

38 device for closing

40-pin type element

The element is sealed 42.

Detailed Description

The sole figure shows an arrangement according to the invention with a fluid-conducting element 10, which is currently a suction hood 12 made of plastic. In the embodiment shown, the suction hood 12 is directly fixedly connected to the housing 14 of the compressor 16 of the exhaust gas turbocharger via screws 18 (only one of which is visible). The suction hood 12 is connected to the compressor 16 in a flow-conducting manner. In the flow direction S, suction air flows from the suction tube 20 through the suction hood 12 into the compressor 16. In the figures, the suction hood 12 is arranged in the assigned mounting position at the housing 14 of the compressor 16.

Furthermore, a crankcase ventilation line 22 is arranged at the housing 14 of the compressor 16, which leads into the compressor 16 downstream of the suction hood 12.

In order to check the intended mounting position of the suction hood 12 on the housing 14 of the compressor 16, a test line 24 with a test hole 26 is provided. The probe hole 26 now forms the end of the probe tube 24. The crankcase ventilation line 22 is configured in this case as a double-walled line and has a first part line 28 (through which the blow-by gas from the crankcase flows) and a second part line 30 (which is the detection line 24). The detection line 24 is connected to a pressure line (not shown) downstream of the compressor 16 in a flow-conducting manner. Furthermore, the probe line 24 surrounds the first partial line 28 at least in sections over the entire circumference in a known manner (not shown).

The detection line 24 is connected in a flow-conducting manner with the detection opening 26 to an opening 32 formed in the housing 14 of the compressor 16. In the embodiment shown, the end of the line 24 is probed to detect the passage of the bore 26 into the passage bore 32. The passage opening 32 is formed in an angled manner and extends from a connection surface 34 pointing toward the suction hood 12 to a connection surface 36 pointing toward the detection line 24.

The fluid-conducting element 10 (here the suction hood 12) has a means 38 for closing the detection opening 26 in the form of a pin element 40 with a sealing element 42 in the form of an O-ring arranged there. In the illustrated installation position, the pin element 40 engages with a sealing element 42 in a passage opening 32 formed in the housing 14 of the compressor 16, so that the passage opening 32 and thus also the detection opening 26 are closed in a sealing manner.

In the event of a displacement of the suction hood 12 from the intended installation position and an associated release of the suction hood 12 from the housing 14 of the compressor 16, the pin element 40 moves out of the passage opening 32, so that gas can escape from the pressure line via the probe line 24 and via the passage opening 32. By means of a pressure sensor (not shown) arranged in the pressure line, the pressure loss can be detected and a feedback provided to the vehicle driver or the plant, i.e. the exhaust-gas-containing gas can reach the surroundings.

The features of the invention disclosed in the description, in the drawing and in the claims can be essential both individually and in any desired combination for the realization of the invention in its different embodiments. The invention may vary within the scope of the claims and taking into account the knowledge of an expert in the field.