• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Exhaust gas sampling device (1) having at least one measuring probe tube (4) with at least one exhaust gas removal opening (18) and at least one measuring gas line (6) connected to the measuring probe tube (4) via at least one coupling (5), the flow direction (S) provided being determined by the exhaust gas sampling device (1 ) of the at least one exhaust gas removal opening (18) of the probe tube (4) to the sample gas line (6), wherein on the exhaust gas extraction device (1) in the flow direction (S) seen before the clutch (5) a sleeve element (3) is arranged, the end face of which Measuring probe tube (4) facing end face of the coupling (5) at least partially covered.
    公开号:AT514008A2
    申请号:T50430/2014
    申请日:2014-06-20
    公开日:2014-09-15
    发明作者:
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    AV-3615 AT
    booted
    The present invention relates to an exhaust gas removal device having at least one measuring probe tube with at least one exhaust gas removal opening and at least one measuring gas line connected to the measuring probe tube via at least one coupling, wherein the provided flow direction through the exhaust gas removal device is from the at least one exhaust gas removal opening of the measuring probe tube to the sample gas line.
    Both for mobile applications and on test benches, evaluation devices, e.g. Particle measuring devices used by which e.g. the number, size, mass of particles in the exhaust gas of an internal combustion engine to be evaluated or analyzed. Such analyzes are required, for example, in the course of regular testing of internal combustion engines in use, for example in the context of the periodic inspection of motor vehicles. Of course, appropriate exhaust gas analyzes also take high priority in the development of internal combustion engines.
    Evaluation devices, which are used in this context, usually have a corresponding sampling probe, via which exhaust gas from the exhaust system or the exhaust of the internal combustion engine is removed. The removed exhaust gas is subsequently fed to a conditioning device or corresponding measuring devices which determine, for example, the chemical composition of the exhaust gas or the contamination with different particles.
    A fundamental problem in this context is the length of the line from the point of removal of the exhaust gas to the corresponding evaluation device or the conditioning device and the measuring devices. Depending on the cable length, there may be different distortions of the measurement result. For example, as a result of environmental factors such as temperature and humidity and related effects, e.g. Condensation, formation of acids and salts, to changes in the chemical composition of the exhaust gas or decrease in larger particles and thus to a separation of the exhaust gas come.
    For example, EP 2 428 790 A1 shows a device for removing exhaust gas from internal combustion engines. Exhaust side, a probe tube is provided, which merges after a receiving element in an exhaust pipe. The exhaust pipe is provided with a corresponding connection via which the exhaust gas is fed to a hose and subsequently to a measuring device. 2 / 2Ϊ1
    AV-3615 AT
    A disadvantage of such devices can be seen that those lines which are used for the forwarding of the exhaust gas, environmental influences are exposed unprotected. As a result, it can lead to the falsification of the measurement results, the measurement errors, such as particle losses, with increasing line length of the above Lei-5 tions are more pronounced.
    For this reason, it is desirable in principle to keep the length of those lines through which exhaust gas is conducted as small as possible.
    For this purpose it is also known to surround the sample gas line with a heater and to temper at a desired temperature. This makes it possible to largely shield the sample gas line from environmental influences, but with the associated higher outlay of the heating device.
    When shortening and adapting the lines, further problems arise. Transitions from the probe tube to a sample gas line, which is used to derive the exhaust gas taken to corresponding analysis facilities, as well as the Meßgasleitun-15 itself are exposed to the exhaust gas exiting the exhaust end, and are subject to due to the high temperatures and chemical aggressiveness of the exhaust gas accordingly Wear. In particular, when using a coupling for connecting the probe tube to the sample gas line, the coupling can be exposed to high thermal and chemical loads, especially since the coupling must be arranged close to the exhaust end due to the shortest possible line length between sampling point and sample gas line.
    The object of the present invention is to provide a long-lasting exhaust gas extraction device for internal combustion engines available.
    The object is achieved in that seen at the exhaust gas extraction device in flow direction Rich-25, before the clutch, a sleeve member is arranged, the end face of which covers the probe tube facing end face of the clutch at least partially. This can ensure that the clutch or the sample gas line is not damaged by the part of the exhaust gas leaving the exhaust end, since these are at least partially shielded by the sleeve. In an advantageous embodiment, it can be provided that the end face of the sleeve element completely covers the end face of the coupling facing the probe tube. In this variant, the sleeve element can fully develop its shielding effect. It is advantageously provided that the sleeve element is connected to the coupling. This allows a particularly simple and fast positioning of the 3 / 2Ϊ2 '
    AV-3615 AT
    Probe tube including the cuff. Loss of the cuff or positioning of the exhaust-gas extraction device without the protective sleeve is thus excluded.
    Advantageously, it is provided that the sleeve element is designed in the form of a probe tube converging towards the measuring tube 5. The top surface or lateral surface of the truncated cone forms the, at least partially, covering end face of the sleeve member. This allows a corresponding redirecting of the exiting from an exhaust end of the exhaust gas with the simplest possible shape and thus easier manufacturability of the sleeve. The exhaust gas is thereby conducted away from the components downstream of the Man-10 cuff element, such as the coupling and sample gas line. Furthermore, by this shaping, the sleeve element opposes the lowest possible flow resistance to the part of the exhaust gas leaving the exhaust end, whereby the outflow of the part of the exhaust gas leaving the exhaust end is less impaired. A variant provides that the sleeve element is designed as a hollow body with a central recess and with two end faces, wherein the hollow body is closed on the front side facing the at least one exhaust gas removal opening of the measuring probe tube and open on the end face facing away from the measuring probe tube. This in turn results in an improved guidance of the part of the exhaust gas emerging from the exhaust end and less turbulence in the region of the sleeve element.
    A further variant provides that the coupling is arranged at least partially within the central recess. As a result, the protective effect of the sleeve element is also, at least partially, extended to the axial region of the coupling. Thus, the protective effect is also extended, at least partially, to the axial extent of the coupling facing away from the measuring probe tube, starting from the closed end face arranged upstream of the coupling.
    In a further variant of the invention, it is provided that the longitudinal axis of the probe tube is inclined relative to the longitudinal axis of the sample gas line by a deflection angle 30. The outflow of the exiting from the exhaust end of the exhaust gas, which is not removed by means of probe tube, is thus hardly affected by the sample gas line. Furthermore, a simpler positioning is ensured because the view of a user on the exhaust end is not affected by the sample gas line. 4 / 2Ϊ3 '
    AV-3615 AT
    A variant provides that the deflection is provided around the deflection angle in the flow direction in front of the sleeve member. As a result, the outflow of the exiting from the exhaust end of the exhaust gas is even less affected.
    Advantageously, the sleeve member has a fixing device for proper attachment to a device, preferably on an exhaust pipe, on. This makes it possible to position the sleeve element in a defined position, for example at the exhaust end, and to ensure its position over the duration of an evaluation or measuring process. In said device may be, for example, the exhaust system, a headband on the body or on the chassis of a motor vehicle or the like.
    In a further variant of the invention, at least two measuring probe tubes with different lengths are provided, so that the openings of the measuring probe tubes lie at different, axial positions, and which are respectively connected via the at least one coupling with sample gas lines. This allows the determination of different parameters in subsequent measuring devices. It is also possible that each probe tube is connected via a separate coupling with a sample gas line. If, for example, only one measuring probe tube and one measuring gas line are used, the withdrawn exhaust gas would have to be divided into two in order to be able to feed it to at least two measuring devices. For this purpose, however, a corresponding divider, for example a Y-piece would have to be used, which would lead to unquantifiable losses, for example due to the adhesion of particles contained in the exhaust gas. Due to the fact that the probe tubes have different lengths, the effect that the probe tubes influence each other negatively when removing the exhaust gas is minimized.
    It is provided in a variant of the invention that the at least two measuring probe tubes run parallel to one another. As a result, there are no further, additional and possibly different deflections of the exhaust gas taken within the probe tubes.
    Advantageously, it is provided that the sample gas line is at least partially surrounded by a heating device. Too much cooling of the exhaust gas removed and an associated, possible change in the chemical composition or Meßwertverfälschung be avoided. Partial Surrounding is understood here both that the sample gas line is only partially surrounded by a heater along its longitudinal axis, and that the heater is not provided over the entire circumference of the sample gas line but only parts thereof. Also combinations of it are possible. -4- 5/21
    AV-3615 AT
    Furthermore, it is advantageously provided that the end face of the sleeve element at least partially covers the end face of the heating device facing the measuring probe tube. As a result, it can be ensured that the heating device is not damaged by the exhaust gases leaving the exhaust end.
    Furthermore, it can be advantageously provided that the end face of the sleeve element completely covers the front surface of the heating device facing the measuring probe tube in order to achieve the highest possible protective effect of the sleeve.
    A further variant of the invention is formed in that at least one coupling piece is arranged between the coupling and the heating device. This allows the heater to be connected to the clutch and also easily released.
    Another variant provides that the coupling piece is divided in the circumferential direction. As a result, an increased accessibility to the transition of the probe tube or the coupling is given to the sample gas line and allows easy separation of the sample gas line and the heating device of the clutch. As a result, if appropriate, a corresponding exchange is considerably simplified.
    It is advantageously provided that the end face of the sleeve element at least partially covers the end face of the coupling piece facing the measuring probe tube, whereby the coupling piece is also protected from the exhaust gases emerging from the exhaust end.
    Furthermore, it can be provided that the end face of the sleeve element completely covers the end face of the coupling piece facing the measuring probe tube in order to achieve the highest possible protective effect of the sleeve.
    A further variant provides that the heating device and / or the coupling piece are at least partially disposed within the central recess / is. The previously mentioned for the clutch, thereby extended protective effect of the sleeve member extends so also, at least partially, on the heater and / or the coupling piece.
    Advantageously, it is further provided that the exhaust gas extraction device is used in a form in which the probe tube is positioned within the exhaust of an internal combustion engine and exhaust gas is removed via the exhaust gas extraction device. In this context, the main advantages of the exhaust gas extraction device to advantage. 6 / 2Ϊ5 ·
    AV-3615 AT
    The subject invention will be explained in more detail below with reference to Figures 1 to 4, which show by way of example, schematically and not by way of limitation advantageous embodiments of the invention. It shows
    1 shows the exhaust gas extraction device according to the invention,
    2 shows the exhaust gas extraction device according to the invention in use,
    3 shows an advantageous embodiment of the exhaust gas extraction device,
    4 shows the exhaust gas extraction device in a variant for multiple sampling,
    5 shows a particularly maintenance-friendly embodiment of the exhaust gas extraction device.
    1 shows the exhaust gas sampling device 1 according to the invention in a first variant with a measuring probe tube 4 with an exhaust gas removal opening 18, wherein the measuring probe tube 4 is connected to a measuring gas line 6 via a coupling 5. According to the invention, a sleeve element 3 is arranged on the exhaust gas sampling device 1 in front of the coupling 5, the end surface of which covers the end surface of the coupling 5 facing the measuring probe tube 4 at least partially in the flow direction S. The sleeve member 3 is thereby pushed onto the probe tube 4 and fixed thereto.
    The end face of the coupling 5 is understood to be a normal projection of the coupling 5 on a normal plane to the longitudinal axis of the coupling 5.
    In the same way, the end face of the sleeve element 3 is to be understood, which represents a normal projection of the sleeve element 3 on a normal plane to the longitudinal axis of the sleeve element 3. By "cover" is meant that superimpose the above-mentioned normal projections of the individual components.
    In the exemplary embodiment illustrated in FIG. 1, the end face of the coupling 5 facing the measuring probe tube 4 is completely covered by the end face of the sleeve-shaped, preferably disc-shaped, sleeve element 3. For the probe tube 4, a material is selected which has both chemically and thermally sufficient resistance to exhaust gases of an internal combustion engine 12. For this purpose, metallic materials such as stainless steel or the like can be used, but also the use of appropriate plastics is conceivable. -6 · 7/21
    AV-3615 AT For the sleeve element 3, analogous to the measuring probe tube 4, a material is selected which has both chemically and thermally sufficient resistance to exhaust gases of an internal combustion engine 12. Therefore, metallic materials such as stainless steel or the like may also be used for the sleeve member 3. Also for the sleeve member 3, the use of appropriate plastics is conceivable.
    For the connection of the probe tube 4 and the sample gas line 6 corresponding fits are provided in the coupling 5, by means of which corresponding plug connections between the probe tube 4 and coupling 5 and the sample gas line 6 and 5 clutch reali-10 Siert. Of course, any other connection forms, as they are known from the field of pneumatics and / or hydraulics, can be used for the connection.
    FIG. 2 shows the exhaust gas extraction device 1 according to the invention, wherein the measuring probe tube 4 is positioned inside the exhaust 2 of an internal combustion engine 12 and the exhaust gas exhaust device 8 is taken off via 15. The exhaust gas 8, which is removed via the measuring probe tube 4, is fed via the sample gas line 6 to an evaluation device 13. In such an evaluation device 13, the exhaust gas 8, for example, on chemical composition, size of the particles contained, particle concentration, etc. examined. However, this list can only be seen by way of example since under-20 different measured variables or their measured values can be of interest.
    Since that part 9 of the exhaust gas, which is not taken off via the measuring probe tube 4, exits through the exhaust end and still has relatively high temperatures, the coupling 5 and the subsequent measuring gas line 6 are shielded by the sleeve element 3 with respect to this part 9 of the exhaust gas. This makes it possible to ensure that the coupling 5 or the sample gas line 6 is not damaged by the part 9 of the exhaust gas leaving the exhaust end.
    The sleeve element 3, which is shown in Fig. 1 only in cross section, may have an arbitrary floor plan. The sleeve element 3 can be executed in the plan or in the previously described normal projection, for example, circular, but also oval or more-30 square.
    On the one hand it can be seen that the sleeve member 3 is connected to the coupling 5, on the other hand, the sleeve member 3 is designed in the form of a truncated cone converging towards the exhaust end. In this case, that variant is shown in which the sleeve element 8 / 2Ϊ7 '
    AV-3615 AT 3, or the truncated cone, as a hollow body with a central recess 17 and is formed with two end faces, wherein the hollow body closed at the at least one exhaust gas removal opening 18 of the probe tube end facing and formed open on the probe tube 4 facing away from the front side is. This in turn results in an improved guidance of the exiting from the exhaust end of the exhaust gas and less turbulence in the region of the sleeve member. The term "closed" here is to be understood as meaning the state when used as intended, since said end face also has openings for the passage of the measuring probe tube 4, these openings then being filled by the measuring probe tube 4 during operation and thus closed.
    Furthermore, it can be seen that the coupling 5 is at least partially disposed within the central recess 17. As a result, the protective effect of the sleeve element 3 is also, at least partially, extended to the axial region of the coupling 5.
    Of course, a variant would also be conceivable in which the sleeve element 3 completely covers the axial region of the coupling 5 or the sleeve element 3 is not designed in the shape of a truncated cone but, for example, in the form of a cylinder or another body with a corresponding central recess 17. The connection, not shown, between the sleeve 3 and the coupling 5 can be cohesively, for example via a corresponding temperature-resistant adhesive bond. Of course, other variants, such as a plug connection, a shrinking of the sleeve 3 on the coupling 5 or the connection by means of corresponding connecting elements such as screws, rivets or the like, conceivable.
    The embodiment of the sleeve 3 in the form of a truncated cone converging towards the exhaust end has the advantage that the part 9 of the exhaust gas which exits through the exhaust end is deflected in a favorable shape. Due to the shape of the sleeve 3 as a truncated cone, the flow resistance of the sleeve 3 is reduced considerably. As a result, the risk that the part 9 of the exhaust gas jams back into the exhaust pipe, minimized. Such a backlog could lead to corresponding distortions of the values determined by the evaluation device 13. Of course, the sleeve member 3 may also have another, a truncated cone-like shape. Again, the floor plan does not have to be circular. As described above, this can also be made oval or polygonal. Strictly speaking, a polygonal floor plan is not a truncated cone but a pyramid, but such an embodiment with the term "truncated cone" is analogously included. Also, that cross section of the sleeve 3, the sectional plane of which runs parallel to the longitudinal axis 15 of the sample gas line 6, can have any desired curve. 9 / 2Ϊ8 '
    AV-3615 AT
    For example, the shape of a parabola, in which the apex faces the exhaust end, is conceivable. In the shaping of the cuff 3 is advantageously the positive effect of a form in the foreground, which ensures a deflection of that part 9 of the exhaust gas, which exits through the exhaust end, with the lowest possible flow resistance.
    4 shows a particularly advantageous embodiment of the exhaust gas removal device, in which the longitudinal axis 14 of the measuring probe tube 4 is inclined relative to the longitudinal axis 15 of the sample gas line 6 by a deflection angle α. The deflection angle α is to be understood as meaning the angle which is spanned between the longitudinal axis 14 of the measuring probe tube 4 which is extended beyond the deflection and the longitudinal axis 15 of the sample gas line 6, which is optionally extended until the deflection, when the probe tube 4 is moved from a position in which it coincides with the longitudinal axis 15 of the sample gas line 6, that is to say when measuring probe tube 4 and sample gas line 6 run essentially in alignment, it is rotated. At this angle, the extracted exhaust gas 8 is deflected during forwarding. For this purpose, for example, the probe tube 4 is performed deflected accordingly. The deflection around the deflection angle α takes place, seen in the flow direction S, before the sleeve member 3, which is why the measuring probe tube 4 has a recognizable in Fig. 4 kink. This has the consequence that the sleeve element 3 and also the subsequent coupling 5 and measuring gas line 6 oppose the exhaust gas emerging from the exhaust end 9 of the even lower flow resistance. The previously described effect of the deflection of the part 9 of the exhaust gas is thus improved by a further.
    Of course, it is also conceivable that the described deflection by the deflection angle α also in the region of the coupling 5 or, as seen in the flow direction S, thereafter, wherein either the measuring probe tube 4 or the sample gas line 6 may have the aforementioned kink. The deflection angle α, below which the longitudinal axis 14 of the measuring probe tube 4 is inclined with respect to the longitudinal axis 15 of the measuring gas line 6, is advantageously to be selected such that the flow of the removed waste gas 8 is influenced as little as possible. From the point of view of the exhaust gas which flows through the measuring probe tube 4, or along its longitudinal axis 14, the exhaust gas is ideally deflected by an angle smaller than 90 ° when it flows into the measuring gas line 6 and further along its longitudinal axis 15. In the case of particulate exhaust gases, it should be borne in mind that as the deflection angle α increases, the danger increases that particles adhere to the point of deflection. This would lead to segregation and thus falsification of the measurement results, on the other hand would change the constriction of the probe tube 4 by the adhering, deposited particles, the flow conditions, which again -9
    AV-3615 AT could lead to possible incorrect measurements. An adaptation of the deflection angle therefore takes place as a function of the type of exhaust gas 8 removed.
    Furthermore, it can be seen in FIG. 4 that the sleeve element 3 has a fixing device 10 in order to fix the sleeve element 3 and the entire exhaust gas removal device 1 in the region of the exhaust end. For example, this fixing device 10 is formed by a clamp 16, by means of which the sleeve element 3 is clamped to the exhaust pipe 2. As a result, the sleeve element 3, the coupling 5 and the subsequent sample gas line 6 can be easily fixed or positioned on the exhaust pipe 2. The clamp 16 allows a simple pushing or positioning and clamping of the Man-10 cradle 3 on the exhaust pipe 2 and exhaust end, without the aid of tools or operating any clamping devices.
    The configuration of the fixing device 10 in the form of a clamp 16 is of course only to be seen as an example. Other embodiments are conceivable, which allow the sleeve member 3 and subsequent components on the exhaust pipe 2 and puff-end to fix or position accordingly. In this case, various clamping devices, possibly with corresponding joints for easy adjustment of the deflection angle a, conceivable.
    The connection of the fixing device 10 with the sleeve 3 is shown in FIGS. 4 and 5 by way of example by means of a screw connection. Of course, a person skilled in the art will be familiar with a number of other possibilities, such as rivets or correspondingly resistant adhesive bonds.
    As can likewise be seen, for example, two measuring probe tubes 4.1 and 4.2 running parallel to each other come into use with different lengths, which in each case, via which at least one coupling 5, are connected to a measuring gas line 6.1 and 6.2. 25 Each of the two measuring probe tubes 4.1 and 4.2 has a respective exhaust gas removal opening 18.1 and 18.2. Also, according to a variant, not shown in the figures, a separate coupling can be provided for each of the measuring probe tubes 4.1 and 4.2.
    The different lengths of the measuring probe tubes 4.1 and 4.2 cause the openings of the measuring probe tubes (4.1, 2.4) to lie at different, axial positions within 30 of the exhaust tube 2. If it is necessary to determine different parameters in the subsequent evaluation device 13, it is advantageous to remove the exhaust gas 8 in separate parts 8.1 and 8.2. Of course, the exhaust gas 8 can of course also be taken in more than two parts 8.1 and 8.2. If, for example, only one measuring probe tube 4 is used, the removed exhaust gas 8 would have to be divided into two, at least two
    AV-3615 AT
    To be able to supply measuring devices to the evaluation device 13. If, for example, a Y-divider is used for this, however, unquantifiable losses occur, for example due to adherence of particles contained in the exhaust gas. As already stated several times, this in turn would lead to the falsification of measurement results. Since pressure fluctuations can occur at the measuring probe tubes 4.1 and 4.2, in particular in the region of their mouths, corresponding turbulences can subsequently form in the exhaust 2. These in turn could falsify or influence the measurement results.
    If the two measuring probe tubes 4.1 and 4.2, which are each connected to a measuring gas line 6.1 10 and 6.2, but different length, the parts to be taken 8.1 and 8.2 of the exhaust gas 8 are taken at different locations in the exhaust 2. This can reduce or minimize the risk of falsification due to turbulence. Whether a probe tube 4.1 is shorter and thus carried out reset relative to the other probe tube 4.2 is dependent on which measured variable is determined in the subsequent evaluation device 13. For example, the chemical composition of the exhaust gas is hardly affected by the above-mentioned turbulence. In contrast, however, the particle size or its distribution in the exhaust gas can be greatly influenced by turbulence. For this reason, it is advantageous, for example, to use that measuring probe tube 4.2, which is made longer, for the removal of a part 8.2 of the exhaust gas 8, which is used to determine the particle size or its distribution in the exhaust gas. For the removal of that part 8.1 of the exhaust gas 8, which is used for example for determining the chemical composition of the exhaust gas 8, for example, the recessed probe tube 4.1 can be used. Due to the parallel arrangement of the measuring probe tubes 4.1 and 4.2, the exhaust gas 8 or its separate parts 8.1 and 8.2 are not deflected differently and further falsification of measurement results is avoided. Furthermore, such an arrangement results in less turbulence in the region of the exhaust end.
    Furthermore, it can be seen that the at least two measuring probe tubes 4 .1 and 4. 2 can also have under-30 different diameters. This is to ensure that the corresponding probe tube 4.1,4.2 is connected to the correct sample gas line 6.1,6.2 and thus subsequently the corresponding part 8.1 and 8.2 of the exhaust gas 8 is guided to the correct measuring device in the evaluation device 13. By using different cable diameters, the risk of confusion is minimized in the simplest way. -11 12/21
    AV-3615 AT It is usually provided that the sample gas line 6 or 6.1 and 6.2 is at least partially surrounded by a heating device 7, as is also shown schematically in FIG. The heating device 7 is shown in FIG. 4 merely by way of example through a heating tube surrounding the sample gas line 6. Of course, other variants such as heating coils, 5 which are wound around the corresponding lines, or the like conceivable. The heating device 7 can also cover the sample gas line 6 or 6.1 and 6.2 only in sections along its longitudinal axis. Only parts of the circumference of the sample gas line 6 or 6.1 and 6.2 may be covered by the heater 7. As can be seen in Figure 4, it is provided that the end face of the sleeve member 3, the probe-10 tube 4 facing end face of the heater 7 at least partially, advantageously completely covered. It can thus be ensured that the heating device 7, in the same way as the clutch 5, is not damaged by the exhaust gases leaving the exhaust end.
    As already stated in connection with the end face of the coupling 5, a normal projection of the heating device 7 on a normal plane to the longitudinal axis of the heating device 7 is also understood as the end face of the heating device 7.
    Repeatedly it should be pointed out that "covering" means that the above-mentioned normal projections of the individual components are superimposed.
    In comparison to the probe tube 4, which is rigid, the sample gas line 6 20 or 6.1 and 6.2 and the associated heater 7 are designed relatively flexible. This allows a better handling of the exhaust gas extraction device 1 during operation, since there is no "rigid" and therefore unwieldy connection between the exhaust gas extraction device 1 and the evaluation device 13.
    By heating the sample gas line 6 or 6.1 and 6.2 by the heater 7 25 is a chemical change in the composition of the extracted exhaust gas 8 and its parts 8.1 and 8.2, for example, as a result of environmental influences such as low outside temperatures prevented. Furthermore, it is well known that such a sample gas line 6 or 6.1 and 6.2 should be kept as short as possible in order to avoid any segregation processes. The shorter the sample gas line 6 or 6.1 and 6.2 is held, the less opportunity, for example, heavy particles to sink within the sample gas line 6 or 6.1 and 6.2. This would lead to a falsification of the measurement results determined in the aforementioned evaluation device 13.
    5 shows a variant in which the heating device 7 is not directly connected to the clutch 5, but between the clutch 5 and the heater 7 in the circumferential direction -12- 13/21
    AV-3615 AT split coupling piece 11 is arranged. The end face of the sleeve member 3 also covers at least partially the end face of the coupling piece 11 facing the probe tube. Advantageously, the end face of the coupling piece 11 is completely covered by the end face of the sleeve member 3. As a result, the protective effect of the sleeve 5 extends before the exhaust gases emerging from the exhaust end, not only via the coupling 5 and the heating device 7, but also via the coupling piece 11.
    Again, a normal projection of the coupling piece 11 on a normal plane to the longitudinal axis of the coupling piece 11 is understood as the end face of the coupling piece 11.
    Of course, it can also be provided that the heating device 7 and / or the coupling piece 11 are at least partially disposed within the central recess 17 / is. The previously mentioned for the coupling, thus extended protective effect of the sleeve member 3 extends so also, at least partially, on the heater 7 15 and / or the coupling piece 11th
    The coupling piece 11 makes it possible to separate the heating device 7 from the coupling 5 and to make that region in which the sample gas lines 6 or 6.1 and 6.2 open into the coupling 5 accessible. This is particularly advantageous if there is a need to replace the sample gas line 6 or 6.1 and 6.2. As described above, the sample gas line 6 or 6.1 and 6.2 and the associated heating device 7 are designed to be flexible. This has the consequence during operation that both sample gas line 6 or 6.1 and 6.2 and the heater 7 are exposed to corresponding wear. For example, it should be considered that when plastics are used as material for the sample gas line 6 or 6.1 and 6.2, which are designed to be correspondingly flexible, plasticizers are usually contained in the plastic. However, since the sample gas line 6 or 6.1 and 6.2 is exposed to the exhaust gas 8 and thus a hot and aggressive medium, a corresponding wear in the form of embrittlement and cracking is foreseen.
    By the use of the coupling piece 11 a simple separation of the heater 7 is made possible by the coupling 5, whereby the corresponding exchange, by the increased accessibility, is substantially simplified.
    In a variant of the invention, the at least one coupling piece 11 is divided in the circumferential direction. If the coupling piece 11 has, for example, a circular cross-section, one follows a division when the circumference is tracked. The coupling piece 11 is thus divided in the circumferential direction in, for example, an upper and a lower cylinder half, wherein the
    AV-3615 AT
    Division plane does not necessarily have to run parallel to the longitudinal axis of the coupling piece 11 and the coupling piece also does not necessarily have a circular cross-section.
    The individual parts of the coupling piece 11, for example, screwed together, or can be fixed via appropriate clamps. This connection is not further illustrated in FIG. 5, since the selection according to advantageous connecting elements can be made without further expert.
    By the described embodiments, a long-lasting exhaust gas removal device for internal combustion engines is made available. -14- 15/21
    权利要求:
    Claims (20)
    [1]
    AV-3615 AT Claims 1. An exhaust gas removal device (1) having at least one measuring probe tube (4) with at least one exhaust gas removal opening (18) and at least one measuring gas line (6) connected to the measuring probe tube (4) via at least one coupling (5) Flow direction (S) through the exhaust gas removal device (1) from the at least one exhaust gas removal opening (18) of the measuring probe tube (4) to the sample gas line (6), characterized in that seen at the exhaust gas extraction device (1) in the flow direction (S) in front of the coupling ( 5) a sleeve element (3) is arranged, the end face of which covers the measuring probe tube (4) facing end face of the coupling (5) at least partially.
    [2]
    2. exhaust gas extraction device (1) according to claim 1, characterized in that the end face of the sleeve element (3) the measuring probe tube (4) facing the end face of the clutch (5) completely covered.
    [3]
    3. exhaust gas extraction device (1) according to one of claims 1 or 2, characterized in that the sleeve element (3) with the coupling (5) is connected.
    [4]
    4. exhaust gas extraction device (1) according to one of Ansprüchel to 3, characterized in that the sleeve element (3) in the form of a measuring probe tube (4) converging towards truncated cone is formed.
    [5]
    5. exhaust gas extraction device (1) according to one of claims 1 to 4, characterized in that the sleeve element (3) is designed as a hollow body with a central recess (17) and with two end faces, wherein the hollow body at the at least one exhaust gas removal opening (18 ) of the measuring probe tube (4) facing the end face and is formed open on the side remote from the probe tube (4) end face.
    [6]
    6. exhaust gas extraction device (1) according to claim 5, characterized in that the coupling (5) is at least partially disposed within the central recess (17).
    [7]
    7. exhaust gas extraction device (1) according to one of claims 1 to 5, characterized in that the longitudinal axis (14) of the probe tube (4) relative to the longitudinal axis (15) of the sample gas line (6) by a deflection angle (a) is inclined. -15- 16/21 AV-3615 AT
    [8]
    8. exhaust gas extraction device (1) according to claim 7, characterized in that the deflection around the deflection angle (a) in the flow direction (S) seen in front of the sleeve member (3) is provided.
    [9]
    9. exhaust extraction device (1) according to one of claims 1 to 8, characterized marked 5 records that the sleeve element (3) has a fixing device (10) for proper attachment to a device, preferably on an exhaust pipe (2).
    [10]
    10. exhaust gas extraction device (1) according to one of claims 1 to 9, characterized in that at least two measuring probe tubes (4.1,4.2) are provided with different lengths 10, so that the openings of the measuring probe tubes (4.1,4.2) are located at different axial positions , and which in each case, via which at least one coupling (5), with a measuring gas line (6.1, 6.2) are connected.
    [11]
    11. exhaust gas extraction device (1) according to claim 10, characterized in that the at least two measuring probe tubes (4.1,4.2) parallel to each other.
    [12]
    12. exhaust gas extraction device (1) according to one of claims 1 to 11, characterized in that the sample gas line (6) is at least partially surrounded by a heating device (7).
    [13]
    13. exhaust gas extraction device (1) according to claim 12, characterized in that the end face of the sleeve member (5) the measuring probe tube (4) facing 20 end face of the heating device (7) at least partially covered.
    [14]
    14. exhaust gas extraction device (1) according to claim 12, characterized in that the end face of the sleeve member (5) the measuring probe tube (4) facing the end face of the heating device (7) completely covered.
    [15]
    15. exhaust gas extraction device (1) according to one of claims 12 to 14, characterized 25 indicates that between the coupling (5) and the heating device (7) at least one coupling piece (11) is arranged.
    [16]
    16. exhaust extraction device (1) according to claim 15, characterized in that the coupling piece (11) is divided in the circumferential direction.
    [17]
    17. exhaust gas extraction device (1) according to claim 15 or 16, characterized in that the end face of the sleeve member (5) at least partially covers the measuring probe tube (4) facing end face of the coupling piece (11). AV-3615 AT
    [18]
    18. exhaust gas extraction device (1) according to claim 15 or 16, characterized in that the end face of the sleeve member (5) the measuring probe tube (4) facing the end face of the coupling piece (11) completely covered.
    [19]
    19. exhaust gas extraction device (1) according to claim 5 and claim 14 and / or claim 18, characterized in that the heating device (7) and / or the coupling piece (11) at least partially within the central recess (17) are arranged / is.
    [20]
    20. The use of the exhaust gas extraction device according to one of claims 1 to 19, characterized in that the probe tube (4) within the exhaust (2) of an internal combustion engine (12) is positioned and via the exhaust gas extraction device 10 exhaust (8) is removed. -17- 18/21
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    同族专利:
    公开号 | 公开日
    AT514008B1|2016-06-15|
    DE102015108606A1|2016-01-07|
    AT514008A3|2016-04-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2648976A|1946-04-12|1953-08-18|John F Robb|Method and apparatus for gas sampling and recording analyses and temperatures|
    AT257213B|1963-09-12|1967-09-25|Bosch Gmbh Robert|Measuring head for electrical measuring devices for determining the unburned exhaust gas components from internal combustion engines|
    DE1932041U|1965-10-11|1966-02-03|Maihak Ag|DEVICE FOR TAPPING GAS IN EXHAUST PIPES OF MOTOR VEHICLES.|
    DE1598827C3|1967-03-02|1975-04-30|H. Maihak Ag, 2000 Hamburg|Gas sampling probe for exhaust gas analysis on gasoline engines|
    DE1972725U|1967-05-12|1967-11-16|Maihak Ag|EXHAUST GAS EXTRACTION PROBES FOR COMBUSTION ENGINES, IN PARTICULAR GASOLINE ENGINES.|
    US4140006A|1975-12-09|1979-02-20|Saphymo-Stel|Device for taking samples of dust in a gas flow|
    FR2485195A1|1980-06-19|1981-12-24|Utac|APPARATUS FOR COLLECTING GAS MIXTURE AND SAMPLE SAMPLING FOR THE ANALYSIS OF MIXTURE COMPONENTS|
    US5907109A|1998-05-05|1999-05-25|Tedeschi; Rinaldo R.|Vehicle emission sampling probe apparatus|
    DE102010040672A1|2010-09-13|2012-03-15|Maha Maschinenbau Haldenwang Gmbh & Co. Kg|gas probe|
    CN202145180U|2011-05-24|2012-02-15|上海朗仕电子设备有限公司|Gas sampling pipe for nitrogen reflow soldering furnace|FR3108161A1|2020-03-11|2021-09-17|Renault S.A.S|NOZZLE FOR A MOTOR VEHICLE EXHAUST GAS EXTRACTION PIPE|
    法律状态:
    2021-02-15| MM01| Lapse because of not paying annual fees|Effective date: 20200620 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50430/2014A|AT514008B1|2014-06-20|2014-06-20|booted|ATA50430/2014A| AT514008B1|2014-06-20|2014-06-20|booted|
    DE102015108606.9A| DE102015108606A1|2014-06-20|2015-06-01|booted|
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