JP2009532604A - Air inlet mechanism for air compressor - Google Patents

Abstract

An air inlet mechanism for an air compressor (110) intended to be provided in a vehicle. The mechanism includes an air inlet pipe (10) for supplying air to the air compressor (110) and an air intake pipe (20) for supplying air to the internal combustion engine (130). The air inlet pipe (10) comprises an end portion (40) having an inlet opening (11) and is attached to the air intake line (20). The end portion (40) has the inlet opening (11) disposed inside the air intake line (20) in the air intake line (20), and the inlet opening (11) is located in the air intake line (20). It is inserted in a manner arranged in the direction of the main air flow direction (F2) intended in the pipe line (20).
[Selection] Figure 2

Description

  The invention relates to an air inlet mechanism for an air compressor according to the premise of claim 1 and to an air compression system according to the premise of claim 21.

  In large vehicles such as trucks and buses, compressed air is required. With this compressed air, the functions of the different pneumatic components and devices of the vehicle are ensured. The air compressor is usually driven by a prime mover such as an internal combustion engine of a vehicle that is mainly used for driving the vehicle. Compressed air is sent to a storage tank and supplied from the storage tank to pneumatic components and equipment. A turbocharged engine is typically used as a prime mover in a commercial vehicle and also supplies power to an air compression system. The turbocharger is driven by engine exhaust gas and supplies pressurized air to the engine to improve engine efficiency.

  In an air compressor, air is compressed in one or more compression cylinders by one or more reciprocating pistons. The compressed air is then stored in an air tank and used downstream for different pneumatic devices such as brakes, suspensions, power clutches and / or other devices. The compressor piston has a sealant that keeps the compressed air on one side of the piston and helps keep the lubricating oil on the opposite side of the piston. That is, the sealant helps keep the lubricating oil away from the compressed air. However, such sealants do not have a perfect effect, which can cause some lubricating oil to enter the compressed air in the aerosol state. The amount of lubricating oil contained in the compressed air due to such leakage depends on the temperature, the rotational speed of the compressor, and the like. The lubricating oil itself and other materials that may change the lubricating oil can adversely affect components of pneumatic devices such as air dryer devices, sealants, valves or sensors, especially at high temperatures.

  It is an object of the present invention to provide an air inlet mechanism for an air compressor of the type described in the opening section, which makes it possible to reduce oil leakage into the compressed air.

  This object is achieved by an air inlet mechanism according to claim 1.

  The end portion of the air inlet pipe is arranged with the inlet opening of the air inlet pipe inside the air intake line and the inlet opening facing the intended direction of air flow in the air intake line In this manner, the air pressure in the air inlet tube is increased by providing an air inlet mechanism that is inserted into an air intake line that is used to supply air to the internal combustion engine. This further prevents oil leakage into the compressed air.

  The present invention is based on the insight that if the air flow to the compressor is limited for any reason, the compressor is burdened to operate in order to supply the compressed air required for the vehicle. In such a state where the air flow is restricted, the air from the crankshaft side more easily passes through the sealant and reaches the air side of the piston, so that from the crankshaft side of the piston of the compressor to the air side of the piston. Oil leakage may increase.

  The main concept of the present invention is that the inlet opening of the air inlet tube is exposed to a direct air flow of air in the air intake line. With the mechanism according to the present invention, the air inlet tube for supplying air to the air compressor is “preloaded” by the air flow in the air intake line. This further reduces the amount of work that must be done by the air compressor and prevents leakage of any oil-air mixture from the crankshaft portion into the cylinder space where the air is compressed.

  The feature that the “inlet opening is arranged in the direction of the main air flow direction intended in the air intake line” can be achieved in different ways. Basically, in order to expose the inlet opening to the air flow inside the air intake conduit, the end portion of the inlet tube relative to the main air flow in the air intake conduit at the position where the inlet tube is attached to the air intake conduit. And the shape of the end portion inserted and placed in the air intake conduit are important.

  According to one embodiment of the invention, the longitudinal length of the end portion of the air inlet pipe away from the air intake line is perpendicular to the main air flow direction intended in the air intake line. And a second component having the same direction as the primary air flow direction intended in the air intake line. The end portion of the air inlet tube is preferably arranged at an angle α with respect to the intended main air flow direction in the air intake line, where the air inlet tube angle α is 10 ° <α. Within the range of <80 °. In many cases, the angle α is suitably in the range of 20 ° <α <70 °, and more preferably in the range of 30 ° <α <60 °. This exposes the entire area of the inlet opening to the air flow in the air intake line.

  According to yet another embodiment of the present invention, the inlet tube has a beveled end that indicates that the end surface of the inlet tube and the longitudinal centerline of the inlet tube form an angle β. Designed, where 0 <β <90 °. In many cases, the end angle β is suitably in the range of 20 ° <β <70 °, and preferably in the range of 30 ° <β <60 °. Such a beveled end portion contributes to exposing the inlet opening to the air flow in the air intake line.

  By appropriate selection of one or both of the above parameters represented by α and β, the end portion of the air inlet tube is intended to have a geometric plane formed by the inlet opening in the air intake line. May be arranged and / or designed in a manner arranged at an angle θ relative to the main air flow direction, where the inlet opening angle θ is in the range of 10 ° <θ <170 °, preferably 30 ° <Θ <150 °, more preferably 45 ° <θ <135 °. In some cases it is advantageous to use an inlet opening angle θ of 60 ° <θ <120 °, preferably the inlet opening angle θ is substantially 90 °. Thus, air can be supplied to the compressor via the air inlet pipe by effectively using the air flow in the air intake pipe line.

  According to yet another embodiment of the present invention, the point of the inlet opening of the air inlet tube that is located closest to the inner surface of the wall of the air intake conduit is that the air inlet tube is attached to the air intake conduit. In position, it is arranged at a position of distance B from the inner surface of the wall portion of the air intake conduit. This distance B is preferably in the range of D / 8 <B <7D / 8, more preferably in the range of D / 4 <B <D / 2. Thereby, any disturbance phenomenon such as turbulence along the inner wall of the air intake pipe can be avoided, and an appropriate arrangement of the inlet openings of the air inlet pipe in the air intake pipe is achieved.

  According to yet another embodiment of the invention, the air inlet tube is attached to a curved portion of the air intake line. In this way, utilizing the design of the air intake line and appropriately positioning the air inlet line in the air intake line, the air inlet line inlet opening is exposed to the air flow in the air intake line. .

  According to a further embodiment of the invention, the end portion of the air inlet tube is designed as a funnel. This increases the area of the inlet opening that is directed in the intended air flow direction in the air intake line.

  The present invention further relates to a large vehicle including an air inlet mechanism according to the present invention. Further advantages and advantageous features of the invention are disclosed in the following description and the dependent claims.

  FIG. 1 shows an air inlet mechanism according to the prior art. The air inlet pipe 10 ′ is connected to the air intake pipe 20 ′ so that a part of the air flowing in the air intake pipe 20 ′ is branched into the air inlet pipe 10 ′. An air inlet pipe 10 'having an inlet opening 11' is connected to the air intake line 20 'at an angle of 90 °. That is, the air intake pipe 20 'and the air inlet pipe 10' form a T-shaped pipe joint or T joint. The intent is to create a flow of air in the air inlet tube 10 'by branching a portion of the air flow in the air intake conduit 20' into the air inlet tube 10 '. The air flow in the air intake line 20 'is indicated by the arrow F2', and the air flow in the air inlet pipe is indicated by the upward arrow F1 'in FIG.

  However, the force exerted by such a branched air flow is often not sufficient to achieve the inflow of air into the inlet tube 10 '. In this case, there is a venturi effect that forms a reactive air flow that moves down the air inlet tube 10 ′, as indicated by the downward arrow F 3 ′ in FIG. This is because the circular cross section of the air inlet tube 10 'has a smaller diameter d', i.e. a smaller cross sectional area, than the air intake line 20 'having a diameter D'.

  FIG. 2 shows a schematic diagram of an air inlet mechanism according to the present invention and a vehicle air compression system according to the present invention. This system includes an air compressor 110 driven by an internal combustion engine 130, for example. The air compressor 110 is disposed in a vehicle 300 such as a truck, and the air compressor 110 is supplied with air through the air inlet pipe 10. The air compressor 110 is configured to deliver compressed air to the vehicle via a supply line 12 leading to a compressed air storage tank (not shown). Other devices such as an air dryer 15 and an unload valve can be placed on the supply line 12.

  The air intake line 20 supplies the engine 130 with air for the combustion process. The air intake conduit 20 includes a first portion upstream of the air filter 140 and a second portion downstream of the filter. The air intake conduit 20 advances from the air filter 140 to the turbocharger 150 and reaches the engine 130. Since the air inlet pipe 10 is mounted downstream of the air filter 140, a separate air compressor filter is not necessarily required. This in practice eliminates the need to inspect and / or replace a separate used or clogged air filter, greatly reducing maintenance costs. Furthermore, engine air filters are dimensioned for much larger air flows and therefore do not clog as easily as standard air compressor filters. That is, the risk of clogging the air filter in the air intake conduit is reduced. The exhaust pipe 160 extends from the engine 130 to the outside. In the embodiment of the air inlet mechanism shown in FIG. 2, the air inlet pipe 10 is attached to the curved portion of the air intake pipe line 20 as shown in the inner part of the square drawn with a broken line.

  By properly configuring the air inlet mechanism for the air compressor according to the present invention, utilizing the force of the existing air flow in the air intake line toward the engine for the combustion process in the engine. It has been found that the amount of oil drawn into the air compressor can be reduced.

  The force K exerted by the air flow is obtained by the following formula:

K = ρ · A · V ²

  Where ρ is the air flow density, A is the cross-sectional area of the air inlet tube in question, and V is the air flow velocity. Accordingly, K is a function of the cross-sectional area of the air inlet tube 10 and the square of the air flow velocity at a given point in the tube. Furthermore, these two factors are correlated in that the speed decreases as the cross-sectional area increases.

  Referring again to FIG. 2, the air inlet tube 10 includes an end portion 40 having an inlet opening 11 and is attached to the air intake line 20. Thereby, in use, a first air flow F1 heading toward the air compressor 110 is obtained inside the air inlet pipe 10, and this first air flow is the air moving toward the engine 130. A part of the second air flow F2 in the intake pipe 20 is branched. Therefore, the inlet opening 11 is supplied with a part of the second air flow, and the remaining part of the second air flow proceeds to the engine 130 as it is. By applying the equation, the inlet opening 11 is configured such that the velocity of the first air flow within the inlet opening 11 is increased and the cross-sectional area of the opening is optimized. The force applied to the air compressor 110 by the first air flow results in a somewhat pressurized air flow at the inlet of the air compressor 110 to achieve precompression of the air compressor, thereby reducing the oil pressure. Leakage is reduced.

  From FIG. 2, the air inlet pipe 10 is attached to the air intake pipe 20 at a position between the air filter 140 and the turbocharger 150 where the air intake pipe 20 is bent and tapered. As can be seen, the position may be defined inside or behind the turbocharger, for example in relation to the engine manifold. Furthermore, the position of the air inlet tube can be integrated with the air filter 140, for example the outlet of the filter.

  Referring to Figures 3a and 3b, an air inlet mechanism according to the present invention is further illustrated. In FIG. 3a, the air intake line 20 for supplying air to the internal combustion engine has a diameter D, and the air inlet pipe 10 for supplying air to the air compressor has a diameter d. As described above, the air inlet tube 10 is attached to the air intake conduit 20. The air inlet tube 10 includes an end portion 40 having an inlet opening 11. Furthermore, the end portion 40 is arranged in the air intake line 20, the inlet opening 11 is arranged inside the air intake line 20, and the inlet opening 11 is the main intended in the air intake line 20. It is inserted in a mode in which the air flow direction F2 is arranged.

  As can be seen from FIG. 3 b, the longitudinal length of the end portion 40 of the air inlet tube 10 in the direction E away from the air intake line 20 is preferably the main air flow direction intended in the air intake line 20. It has one length component E1 that is perpendicular to F2, and a second length component E2 that has the same direction as the primary air flow direction F2 intended in the air intake line 20. This suggests that the end portion 40 of the air inlet tube 10 is preferably arranged at an angle α with respect to the intended primary air flow direction F2 in the air intake line 20. Here, 0 <α <90 °.

  In FIGS. 3a and 3b, two other angles are also shown. The air inlet tube 10 preferably has a beveled end portion such that the main extension direction of the end face 25 of the air inlet tube 10 and the longitudinal centerline 26 of the air inlet tube 10 form an end angle β. 40, where 0 <β <90 °.

  In other words, the end portion 40 is preferably arranged such that the geometric plane 27 formed by the inlet opening 11 is at an angle θ with respect to the main air flow direction F2 intended in the air intake line 20. May be designed and / or arranged in which the inlet opening angle θ is in the range of 10 ° <θ <170 °.

  In FIG. 3 a, furthermore, the end portion 40 of the air inlet tube 10 is located at the point of the inlet opening 11 of the air inlet tube 10 that is located closest to the wall 28 of the air intake line 20. 10 is inserted into the air intake pipe 20 in such a manner that it is disposed at a distance B from the inner surface of the wall 28 of the air intake pipe 20 at the position where the air intake pipe 10 is attached to the air intake pipe 20. Is shown. Since the end portion 40 of the air inlet tube is beveled, there is a maximum distance C between the wall and the inlet opening 11, where C> B. It should be emphasized that the distance B can be zero when the end portion is beveled. However, C must be greater than zero in order for the end portion to be inserted and placed in the air intake line. In other embodiments, the distance may of course be B = C, where B and C are greater than zero.

  The cross-sectional area of the air intake line 20 is the same before and after the position where the air inlet pipe 10 is attached, as shown for example in FIGS. 3a and 3b. Can be made smaller downstream of the position to increase the first air flow F1 flowing into the inlet opening 11 of the air inlet tube 10.

  For all the embodiments of the invention described herein, these components are joined depending on the materials used for the air intake line 20 and the air inlet line 10 connected to each other, such as metal, plastic, etc. Techniques such as welding and the use of adhesives that are different are well known to those skilled in the art. Although these figures show that the air inlet tube 10 and the air intake line 20 have a circular cross section, any other suitable cross-sectional current parts may be used as an alternative. Note that you can. Preferably, the cross-sectional shape of the end portion 40 of the air inlet tube 10 and the cross-sectional shape of the air intake line 20 result in an inlet opening 11 having a shape suitable for creating a larger amount of the first air flow. Selected. That is, the inlet opening 11 has a shape that enables and facilitates the branching of air into the air inlet pipe.

  FIGS. 4a-5c illustrate yet another configuration of an air inlet mechanism according to the present invention.

  In FIG. 4 a, the end portion of the air inlet pipe 10 is inserted into the air intake pipe 20 in such a manner that the inlet opening 11 is provided at a distance B with respect to the inner surface of the air intake pipe 20. This reduces the risk that, for example, a turbulent second air flow, ie a lower pressure air flow, will occur at the position of the inlet opening 11. As can be seen from FIG. 4a, the end portion 40 of the air inlet tube is beveled, i.e. with an oblique cut located substantially 45 degrees with respect to the longitudinal axis of the air inlet tube 10, and the inlet opening. 11 are arranged in such a manner as to form a geometric plane located perpendicular to the direction F2 of the second air flow inside the air intake duct 20. Thereby, the force of the first air flow flowing into the inlet opening 11 is further increased, and the above-mentioned venturi effect is canceled.

  In FIG. 4b, the end portion of the air inlet tube 10 is located in the air intake conduit 20 so that a part of the peripheral edge of the inlet opening 11 contacts the inner surface of the air intake conduit 20, that is, B = 0. Inserted into. In the same manner as described above, the end portion comprises a beveled end, ie, an oblique cut located substantially 45 degrees with respect to the longitudinal axis of the air inlet tube 10, and the inlet opening 11 has an air intake line 20. A geometric plane arranged perpendicular to the direction of the second air flow F2 inside, i.e. the angle θ is substantially 90 degrees.

  In FIG. 4 c, the air inlet tube 10 is mounted as a T-joint with the air intake line 20, and the end portion 40 having the inlet opening 11 is located substantially 45 degrees with respect to the longitudinal axis of the air inlet tube 10. With an oblique cut, the end portion 40 of the air inlet tube is such that the geometric plane formed by the inlet opening 11 is substantially 45 degrees with respect to the direction of air flow F2 inside the air intake line 20. It arrange | positions in the aspect which makes equal angle (theta).

  In FIG. 5a, the air intake line 20 is bent, ie forms a curved part to which the air inlet tube 10 is attached. The air inlet tube 10 is inserted into the air intake conduit 20 to a position where the air intake conduit 20 is substantially straight. This suggests that the communication point is thus arranged so that the inlet opening 11 is located in front of the curved portion. Thereby, the force of the first air flow at the inlet opening 11 can be increased if the air inlet tube 10 is properly positioned relative to the resulting air flow of the air intake conduit 20. The air inlet pipe 10 is provided as a straight pipe having a beveled or non-beveled end portion. Since the longitudinal axis of the air inlet tube 10 is parallel to the air flow in the air intake line 20, the angle of the end portion does not cause a large change in the air flow flowing into the air inlet tube. Although not advantageous depending on the turbulence of the air flow in the air intake line 20.

  In FIG. 5 b, the end portion of the air inlet tube 10 is provided with a bend having an angle v of substantially 90 degrees and is arranged inside the air intake line 20. Proper placement with respect to the air intake line 20 maximizes the area of the inlet that receives the second airflow, thereby increasing the force of the first airflow flowing into the inlet opening 11.

  In FIG. 5 c, the end portion of the air inlet tube 10 is designed as a funnel 50 so that the area expansion of the inlet opening 11 is achieved. Furthermore, the end portion of the air inlet tube 10 includes a bent portion having an angle v larger than 90 degrees. In this embodiment, the air inlet tube 10 is guided when a second air flow acts on the inlet opening 11 and thus on the connection between the air inlet tube 10 and the air intake line 20. It arrange | positions in the aspect which can reduce the stress to be carried out. As a result, the speed of the first air flow in the air inlet pipe can be increased and the required installation space can be saved.

  Still other aspects that are conceivable but not shown may include, for example, a fan-shaped guide vane structure that extends radially from the funnel-shaped end portion to the inner surface of the air intake conduit. These guide vanes are in contact with and / or attachable to the inner surface of the air intake line. This further increases the speed of the first air flow entering the inlet opening 11.

  Other embodiments are conceivable, such as an air inlet mechanism that includes a device for sucking air flow, such as fans, bellows, flaps, skirts, filters, etc.

  In the foregoing, the present invention has been described with reference to an air compressor powered by a truck internal combustion engine. However, it has been found by the present invention that the mechanism according to the present invention can be configured using any air compressor used in combination with the combustion process air intake by appropriately selecting the configuration. Different types of suitable air compressors are from reciprocating or pistons, positive displacement compressors such as rotating screws or movable airfoil rotary compressors, or dynamic compression compressors such as centrifugal compressors and other types of compressors. Become. Different types of suitable main drive requiring combustion air are, for example, gas fuel engines or turbines, diesel or gasoline engines, and the like. The present invention is suitable for diesel engines with or without a turbocharger.

  It should be understood that the present invention is not limited to the embodiments described above and shown in the drawings. Rather, those skilled in the art will recognize many modifications and variations that are possible within the scope of the appended claims.

FIG. 2 is a diagram of an air inlet mechanism according to the prior art. 1 is a schematic diagram of an air inlet mechanism according to the present invention comprising an air compression engine system. 1 is a schematic diagram of an air inlet mechanism according to the present invention. 4 is a schematic illustration of another embodiment of an air inlet mechanism according to the present invention. 6 is a schematic diagram of yet another different embodiment of an air inlet mechanism according to the present invention. 6 is a schematic diagram of yet another different embodiment of an air inlet mechanism according to the present invention. 6 is a schematic diagram of yet another different embodiment of an air inlet mechanism according to the present invention. 6 is a schematic diagram of yet another different embodiment of an air inlet mechanism according to the present invention. 6 is a schematic diagram of yet another different embodiment of an air inlet mechanism according to the present invention. 6 is a schematic diagram of yet another different embodiment of an air inlet mechanism according to the present invention.

Claims (23)

  An air inlet mechanism for an air compressor (110) intended to be provided in a vehicle, the air inlet pipe (10) for supplying air to the air compressor (110), and an internal combustion engine (130) An air intake line (20) for supplying air, the air inlet pipe (10) having an end portion (40) having an inlet opening (11) and in the air intake line (20). In the attached air inlet mechanism, the end portion (40) of the air inlet pipe (10) is in the air intake line (20) and the inlet opening (11) is in the air intake line (20). It is arranged inside and is characterized in that it is inserted in such a manner that the inlet opening (11) is arranged in the direction of the main air flow direction (F2) intended in the air intake line (20). Air inlet mechanism.   The longitudinal length of the end portion (40) of the air inlet pipe (10) in a direction away from the air intake line (20) is the main air flow intended in the air intake line (20). One length component (E1) perpendicular to the direction (F2) and a second component having the same direction as the main air flow direction (F2) intended in the air intake line (20) It has (E2), The air inlet mechanism of Claim 1 characterized by the above-mentioned.   The end portion (40) of the air inlet pipe (10) is arranged at an angle α with respect to the intended main air flow direction (F2) in the air intake line (20), and the air The air inlet mechanism according to claim 2, wherein the inlet pipe angle α is in a range of 10 ° <α <80 °.   The air inlet mechanism according to claim 3, wherein the air inlet tube angle α is in a range of 20 ° <α <70 °.   The air inlet mechanism according to claim 3, wherein the air inlet tube angle α is in a range of 30 ° <α <60 °.   The air inlet mechanism according to claim 3, wherein the air inlet tube angle α is substantially 45 °.   The inlet pipe (10) has an oblique end shape in which the main extension direction of the end face (25) of the inlet pipe (10) and the longitudinal center line of the inlet pipe form an end angle β. 7. Air inlet mechanism according to any of the preceding claims, characterized in that it is designed with an end portion (40), where 0 <β <90 °.   The air inlet mechanism according to claim 7, wherein the end angle β is in a range of 20 ° <β <70 °.   The air inlet mechanism according to claim 7, wherein the end angle β is in a range of 30 ° <β <60 °.   The air inlet mechanism according to claim 7, wherein the end angle β is substantially 45 °.   Said end portion (40) is relative to the main air flow direction (F2) in which the geometric plane (27) formed by said inlet opening (11) is intended in said air intake line (20). 11. Designed and / or arranged in a manner arranged at an angle θ, the inlet opening angle θ being in the range of 10 ° <θ <170 °. An air inlet mechanism according to claim 1.   The air inlet mechanism according to claim 11, wherein the inlet opening angle θ is in a range of 30 ° <θ <150 °.   The air inlet mechanism according to claim 11, wherein the inlet opening angle θ is in a range of 45 ° <θ <135 °.   The air inlet mechanism according to claim 11, wherein the inlet opening angle θ is in a range of 60 ° <θ <120 °.   The air inlet mechanism according to claim 11, wherein the inlet opening angle θ is substantially 90 °.   The point of the inlet opening (11) of the air inlet pipe (10) located closest to the wall (28) of the air intake pipe (20) is that the air inlet pipe (10) 16. The device according to claim 1, wherein the air intake pipe line is arranged at a distance B from the inner surface of the wall portion of the air intake pipe line at a position where the pipe is attached to the pipe line. The air inlet mechanism as described in.   The distance (B) between the point of the inlet opening and the air intake conduit wall is in the range of D / 8 <B <7D / 8, where D is the air intake tube 17. Air inlet mechanism according to claim 16, characterized in that it is the diameter of the passage (20) or a dimension corresponding thereto.   The distance (B) between the point of the inlet opening and the air intake pipe wall is in a range of D / 4 <B <D / 2, where D is the air intake pipe. 17. Air inlet mechanism according to claim 16, characterized in that it is the diameter of the passage (20) or a dimension corresponding thereto.   19. Air inlet mechanism according to any of the preceding claims, characterized in that the air inlet pipe (10) is attached to a curved part of the air intake line (20).   Air inlet mechanism (X) according to any of the preceding claims, characterized in that the end portion (40) of the air inlet pipe (10) is designed as a funnel (50).   An engine (130), an air compressor (110) driven by the engine, an air inlet pipe (10) for supplying air to the air compressor (110), and an air supply to the engine (130) The air inlet pipe (10) includes an end portion (40) having an inlet opening (11) and is attached to the air intake pipe (20). In the air compression system for use, the end portion (40) of the air inlet pipe (10) is in the air intake pipe (20), and the inlet opening (11) is inside the air intake pipe (20). And the inlet opening (11) is inserted in a manner arranged in the direction of the main air flow direction (F2) intended in the air intake line (20). , Air compression system.   A large vehicle comprising the air inlet mechanism according to any one of claims 1 to 20 or the air compression system according to claim 21. An air inlet mechanism for a vehicle air compressor (110) comprising:
An air inlet pipe (10) for the air compressor (110);
An air intake line (20) for the internal combustion engine (130),
The air inlet pipe (10) comprises an end portion having an inlet opening (11) and is attached to the air intake line (20) in an air inlet mechanism,
The inlet opening (11) is configured in such a way that a first air flow towards the air compressor (110) is obtained in the air inlet pipe (10), the first air flow being Created by a second air flow inside the air intake line (20) towards the engine (130), the air inlet pipe (10) is in the air intake line (20), Air inlet mechanism, characterized in that the inlet opening (11) is inserted in a manner arranged inside the air intake line (20).

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