Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
  • F02M35/10026—Plenum chambers
  • F02M35/10039—Intake ducts situated partly within or on the plenum chamber housing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
  • F02F7/00—Casings, e.g. crankcases or frames
  • F02F7/006—Camshaft or pushrod housings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/02—Air cleaners
  • F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
  • F02M35/10026—Plenum chambers
  • F02M35/10052—Plenum chambers special shapes or arrangements of plenum chambers; Constructional details
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
  • F02M35/10111—Substantially V-, C- or U-shaped ducts in direction of the flow path
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
  • F02M35/10288—Air intakes combined with another engine part, e.g. cylinder head cover or being cast in one piece with the exhaust manifold, cylinder head or engine block
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
  • F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
  • F02M35/161—Arrangement of the air intake system in the engine compartment, e.g. with respect to the bonnet or the vehicle front face
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
  • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
  • F05C2225/08—Thermoplastics

Definitions

• the invention relates to an air duct system according to the preamble of the main claim.
• the air guidance system is provided for an internal combustion engine of a motor vehicle.
• Such an air guidance system is known for example from DE-PS 38 42 248.
• the known air guidance system has an air inlet opening, a suction channel adjoining the air inlet opening downstream, and an outlet opening connected to a gas inlet opening of the combustion chamber of an internal combustion engine.
• the outlet opening is located downstream of an outlet channel.
• the suction channel and the outlet channel are designed as a diffuser in order to produce noise damping. Downstream of the suction channel or upstream of the outlet channel is a deflection chamber which deflects the gas flow through 180 ° from the suction channel into the outlet channel.
• an air filter for filtering the air flowing through the air guidance system for the internal combustion engine, which can only be accessed by removing the housing of the deflection chamber.
• a disadvantage of the known air duct system is that the air filter is relatively difficult to access and the installation and removal of the air filter is relatively large
• the air filter has a relatively low usable
• the air duct system according to the invention with the characterizing feature of claim 1 has the advantage that the air filter can be installed in the air duct system without major assembly work and can be replaced relatively easily in the event of maintenance.
• the suction channel also serves as a housing for the air filter, so that the cavity of the suction channel is used as a filter space. This achieves a high packing density of the components in the intake area of the air guidance system and further reduces the installation space required for the air guidance system. Overall, an extremely compact design of the air guidance system is achieved and at the same time the volume area through which the unfiltered unfiltered air flows is reduced to a minimum.
• the suction channel can be closed on the side of the air inlet opening with a cover, so that the air filter can be replaced in a few simple steps after the cover has been removed.
• the air filter is preferably designed as a component which is axially aligned with respect to the longitudinal axis of the suction channel and which separates an axial inner chamber from a peripheral outer chamber.
• the axial alignment of the air filter results in a particularly large filter area, as a result of which the air filter exerts
• Flow resistance is advantageously reduced.
• a particularly compact and at the same time dimensionally stable component is obtained if the air filter is designed as a hollow cylinder.
• FIG. 1 shows a longitudinal section through an embodiment of the air duct system.
• FIG. 2 shows a cross section through an exemplary embodiment of the air guidance system, which essentially has the structure shown in FIG. 1;
• Fig. 3 is a perspective view of an air duct system according to the embodiment shown in Fig. 2; 4 shows a longitudinal section through the suction channel of a further exemplary embodiment of an air guidance system, and
• FIG. 5 shows a longitudinal section through an air guidance system according to a further exemplary embodiment. Description of the embodiments
• the air duct system designed according to the invention can be provided in different internal combustion engines.
• the internal combustion engine is, for example, an engine to which air or a fuel-air mixture is supplied via the air routing system.
• the air guidance system can be assembled together with various components required to operate the internal combustion engine.
• the internal combustion engine is, for example, a naturally aspirated engine, in which air is sucked in by appropriate movement of the pistons.
• the internal combustion engine preferably has several cylinders, but in principle it can also be an internal combustion engine with a single cylinder.
• the internal combustion engine can be of different types and can be used to drive different machines, it is assumed for the sake of simplicity in the following description of the exemplary embodiments that the internal combustion engine works according to the gasoline engine principle, is a naturally aspirated engine, is installed in the engine compartment of a motor vehicle and is used to drive the motor vehicle . It is also assumed that the internal combustion engine comprises four cylinders arranged in series, the series of the four cylinders being installed transversely to the direction of travel of the motor vehicle.
• FIG. 2 shows a longitudinal section through an air guidance system according to the invention.
• the sectional plane shown runs transversely to the direction of travel of the motor vehicle.
• FIG. 1 shows a cross section along the direction of travel of the motor vehicle through an air guidance system which is essentially identical in construction to the air guidance system shown in FIG. 1.
• the cut surfaces shown in FIGS. 1 and 2 are each not in one plane, but instead have multiple gradations, so that the essence of the invention can be seen as clearly as possible.
• FIG. 3 shows a view of the air guidance system corresponding to FIG. 2, the viewing direction being from obliquely to the front, somewhat above the air guidance system.
• the air guide system 2 which is preferably selected for the description and for the drawing, is essentially composed of a first air guide part 4, a second air guide part 6, a tube 8 and a design hood 10. Roughly considered, the first air duct part 4, the second air duct part 6, the pipe 8 and the design hood 10 are main components of the air duct system 2.
• FIG. Is shown several times in parentheses that shows the particular detail particularly clearly.
• the selected internal combustion engine is four-cylinder and has a cylinder head 12.
• a small area of a section through the cylinder head 12 is shown of the internal combustion engine (FIG. 2).
• FIG. 2 For the sake of clarity, essentially only the outlines of the section through the cylinder head 12 are shown.
• the cylinder head 12 belongs to an internal combustion engine with at least one cylinder.
• a displaceably mounted piston (not shown for clarity) and a combustion chamber (the better one For clarity also not shown).
• a combustion chamber (the better one For clarity also not shown).
• Air or a fuel-air mixture can enter the combustion chamber through the gas inlet opening 14.
• the air guidance system 2 has an air inlet opening 16 (FIGS. 1, 2) and an outlet opening 18 (FIG. 2).
• a gas guide pipe leads through the air guide system 2.
• the gas guide tube is referred to below as the gas guide space 20.
• the gas guide space 20 begins at the air inlet opening 16 and leads via the outlet opening 18 into the gas inlet opening 14 of the cylinder head 12 of the internal combustion engine.
• Air can flow through the gas inlet space 20 through the air inlet opening 16 and into the combustion chamber of the internal combustion engine.
• fuel or a mixture can be supplied to the air flowing through, depending on the type of internal combustion engine and as required.
• the gas guide space 20 is subsequently divided into several parts.
• the gas guide space 20 first comprises an air inlet opening 16, which is followed by a suction channel 22 downstream (FIGS. 1, 2).
• the suction channel 22 also serves as a filter installation space and accommodates an air filter 200, which will be described in more detail below.
• the suction channel 22 is followed by three connecting channels 23 (FIG. 1).
• the connecting channels 23 come together again in a post-filter space 26.
• a calming channel 27 (FIGS. 1, 2).
• the calming channel 27 is followed by a connecting channel 28 (FIG. 1).
• the connecting channel 28 is located essentially within the flexible tube 8.
• the connecting channel 28 ends downstream in a throttle element 29 (FIGS. 1, 3).
• a connecting piece 30 then follows downstream (FIGS. 1, 3).
• the connecting piece 30 opens into a gas distribution space 31 (FIGS. 1, 2).
• a channel 32 branches off from the gas distribution space 31 (FIGS. 1, 2, 3).
• the channel 32 leads the medium flowing through the air guidance system 2 or a part of this medium from the gas distribution space 31 through the Outlet opening 18 and through the gas inlet opening 14 into the combustion chamber
• the preferably selected air routing system 2 is provided, for example, for an internal combustion engine with four combustion chambers, three further channels 32a, 32b, 32c (FIGS. 1, 3) branch off from the gas distribution space 31 parallel to the channel 32, each of the channels 32, 32a , 32b, 32c each lead to a combustion chamber of the four-cylinder internal combustion engine.
• the suction duct 22 and, in part, the connecting ducts 23 belong to an area of the air guidance system 2, which is subsequently referred to as the area 38 carried out.
• the channels 32, 32a, 32b, 32c branch off, viewed in the longitudinal direction of the gas distribution space 31, almost vertically from the gas distribution space 31.
• the channels 32, 32a, 32b, 32c form a spiral-shaped arch region 40 (FIG. 2) of the air guidance system 2. Roughly speaking, the arch region 40 can be divided into a first sub-region 41, a second sub-region 42 and a third sub-region 43.
• the first section 41 begins at the junction of the channels 32, 32a, 32b, 32c from the gas distribution space 31.
• the channels 32, 32a, 32b, 32c are connected to one another via a wall 46 (FIG. 1).
• the first partial region 41 of the channels 32, 32a, 32b, 32c (FIG. 1) is located on the side of the wall 46 facing outwards, and the suction channel 22 is located on the side of the wall 46 facing inwards.
• the wall 46 separates the suction channel 22 from the environment, and the wall 46 also serves to separate the channels 32, 32a, 32b, 32c from the suction channel 22.
• the channels 32, 2a, 32b, 32c run in an arc (right curve by approximately 90 ° when viewed in accordance with FIG. 2).
• a short straight section follows the arch.
• the end of the first section 41 is mentally placed at the end of the straight piece.
• the second partial area 42 of the arch area 40 adjoins the first partial area 41.
• the channels 32, 32a, 32b, 32c are in a further arc
• the channels 32, 32a, 32b, 32c are spaced apart from one another, so that gaps arise between the channels 32, 32a, 32b, 32c, which form the connecting channels
• the air can escape between the spaced channels 32, 32a, 32b, 32c
• the third partial region 43 follows (FIG. 2).
• the channels 32, 32a, 32b, 32c are then essentially straight until the channels 32, 32a, 32b, 32c each end at an outlet opening 18.
• the channels 32, 32a, 32b, 32c are bent helically.
• the channels 32, 32a, 32b, 32c are bent in the three partial areas 41, 42, 43, for example by a total of 180 °.
• the channels 32, 32a, 32b, 32c can in particular also be bent by more than 180 °.
• the so-called helically shaped arch region 40 at least partially encloses the region 38 that has been passed through.
• FIG. 2 There is a space 48 on the cylinder head 12 of the internal combustion engine (FIG. 2).
• the intake valves, exhaust valves and the control shaft for controlling the intake and exhaust valves which are common in an internal combustion engine.
• the control shaft, the intake and exhaust valves are not shown for clarity.
• the space 48 (FIG. 2) is covered with the aid of a cylinder head cover 50 (FIG. 2).
• the cylinder head cover 50 is shaped in such a way that it serves both to cover the space 48 of the cylinder head 12 and to form the second air guiding part 6 of the air guiding system 2.
• the second air duct part 6 is shaped so that it is both a component of the air duct system 2 and also serves to cover the space 48 of the internal combustion engine.
• the second air guide part 6 with the integrally formed cylinder head cover 50 can be made in one piece from one another Injection mold can be obtained.
• the material of the second air guide part 6 is preferably plastic.
• the post-filter chamber 26 is against by a circumferential seal 58 (Fig. 1, 2)
• connection opening 64 (FIG. 1) is formed on the second air guide part 6.
• the connection opening 64 opens into the calming channel 27.
• a flow meter can be provided in the connection opening 64.
• the flow meter can sense the volume flowing through the gas guide space 20 per unit of time or the mass of air flowing through the gas guide space 20 per unit of time and deliver a corresponding electrical signal to electronics, not shown.
• a temperature meter measuring the temperature of the air flowing through can also be installed in the connection opening 64.
• a sieve 68 made of metal (FIG. 1) and / or a flow grille 68a made of plastic are provided in the calming channel 27.
• the screen 68 and the flow grid 68a promote the calming of the air flowing into the flow meter.
• the second air duct part 6 of the air duct system 2 which also takes over the function of the cylinder head cover 50, is connected to the cylinder head 12 of the internal combustion engine via a fastening means 70 (FIG. 2) or via a plurality of fastening means 70.
• the fastening means 70 is formed, for example, in the form of a screw or in the form of a plurality of screws with which the air guide part 6 is firmly connected to the internal combustion engine.
• a circumferential cylinder head gasket 72 (FIG. 2) is provided between the cylinder head 12 and the air guiding part 6 and seals the space 48 from the environment.
• the second air guide part 6 is fixed to the first air guide part 4 via a fastening means 74 (FIG. 2), but detachably if necessary.
• the fastening means 74 comprises, for example, one or more clips distributed over the circumference.
• the brackets of the fastening means 74 are, for example, on the second air guide part
• a housing seal 76 is provided between the first air guide part 4 and the second air guide part 6 (FIGS. 1, 2).
• Housing seal 76 seals the gas guide space 20 from the environment.
• the design hood 10 is placed on the second air guide part 6.
• the shapes of the design hood 10 and the second air guide part 6 are coordinated with one another in such a way that a cavity is formed between the design hood 10 and the second air guide part 6, which is part of the post-filter space 26.
• the cavity between the design hood 10 and the second air guiding part 6 not only extends in the area immediately downstream of the channels 32, 32a, 32b, 32c, but this cavity also extends far into the area that extends above the cylinder hood 50 covering the space 48 located. This creates an additional chamber 78 between the design hood 10 and the second air guide part 6 (FIG. 2). Chamber 78 is not directly in the flow of air, but is somewhat apart from it.
• intermediate webs are provided for reinforcement. There are openings in the intermediate webs, so that the additional chamber 78 is directly connected to the gas guide space 20.
• the additional chamber 78 increases the usable volume of the gas guide space 20 in terms of volume. This has considerable influences on the noise behavior of the internal combustion engine. The fact that the gas guide space 20 can be made quite large even with limited external space conditions, the noise development of the air guide system 2 or the internal combustion engine can be significantly reduced.
• the design hood 10 is fixed to the second air guide part 6 via a fastening means 80, but is detachably connected if necessary (FIG. 2).
• the fastener 80 includes, for example, a hinge 80a or more hinges 80a, a screw 80b or more screws 80b and a bracket 80c or more brackets 80c.
• the fastening means 80 also includes one the air guide part 6 is formed or cut nut thread 80d (Fig. 2) or several nut threads 80d for screwing in the screw 80b or screws 80b for fastening the design hood 10 to the air guide part 6. After loosening the clamp 80c and the screw 80b, the design hood can 10 can be pivoted relative to the air guide part 6.
• a circumferential seal 82 is provided at points of contact between the design hood 10 and the second air guide part 6.
• the seal 82 is also attached to the intermediate webs between the air guide part 6 and the design hood 10.
• the cylinder head gasket 72, the housing gasket 76 between the two air duct parts 4 and 6 and the gasket 82 serve for sealing and for acoustic decoupling between the various components and thus have a noise-reducing effect.
• a fuel supply opening 84 (FIG. 2) is provided in the air guidance system 2. As the preferred embodiment selected shows, the fuel supply opening 84 leads into the gas guide space 20 in the area of the outlet opening 18. A corresponding number of fuel supply openings 84 is provided in accordance with the number of channels 32, 32a, 32b, 32c.
• a fuel rail 86 (FIG. 2) is mounted on the air routing system 2.
• the fuel rail 86 comprises a fuel pipe 88, an electromagnetically actuated injection valve 90 (FIG. 2) and a fuel connection piece 92.
• An injection valve 90 is inserted into each of the fuel supply openings.
• Each of these four injection valves 90 branches off from the fuel pipe 88.
• the fuel Via a fuel pump, not shown, the fuel reaches the fuel pipe 88 via the fuel connection piece 92.
• a cavity 94 is formed which extends along the four cylinders of the internal combustion engine, for example.
• the fuel rail 86 with the injection valves 90 can be arranged in this cavity 94.
• a multiple-angled, dash-dotted line 98 is shown in FIG. 2.
• the air guiding system 2 has the helically shaped arc region 40 and the at least partially implemented within the helical arch region 40, essentially 38 comprising the suction channel 22, This results in the particularly good utilization of the available installation space 100.
• the pipe 8 is connected with its upstream end to the calming channel 27 formed on the air guiding part 6 (FIG. 1), and the pipe 8 is connected downstream to the throttle element 29.
• the throttle element 29 is mechanically coupled to the first air guide part 4.
• the two air duct parts 4 and 6 are largely decoupled in terms of vibration and acoustics via the elastic housing seal 76.
• the tube 8 is elastic and therefore does not hinder the vibration decoupling between the two air guide parts 4 and 6 or insignificantly.
• the throttle member 29 comprises, for example, a throttle valve 29b pivotally mounted in a throttle valve connector 29a (FIG. 1).
• the position of the throttle valve 29b can be changed, for example, with the aid of an electrically controllable actuator 29c (FIG. 3).
• the throttle body 29 comprising the throttle valve connector 29a, the throttle valve 29b and the actuator 29c can be flanged as a complete unit to the first air duct part 4 of the air duct system 2.
• a holding device 102 (FIG. 3) is provided on the air guidance system 2, which is preferably shown by way of example.
• a tank ventilation valve can be attached to the air guidance system 2 via the holding device 102.
• the holding device 102 is formed, for example, on the connecting piece 30 of the first air guide part 4.
• the air guidance system 2 forms a functional unit for an internal combustion engine and can therefore also be referred to as an air guidance module.
• a flange surface 104 (FIG. 2) is provided on the first air guide part 4.
• the first air guide part 4 can be fastened with the flange surface 104 to the counter flange surface of the internal combustion engine. Fastening means not shown in the drawing, in particular screws, are used for fastening.
• the four injection valves 90 are provided in order to measure fuel separately for each cylinder of the internal combustion engine.
• the air guidance system 2 can also be designed such that fuel is supplied to the air guidance system 2 at another point. It is possible, for example, to inject fuel into the gas guide space 20 in the region of the throttle element 29, the fuel being intensively mixed with the air in the region of the throttle element 29 and being fed together with the air to the combustion chambers of the internal combustion engine.
• the air guide part 4 In the first air guiding part 4 there is a curved first division level 106 and a curved second division level 108 (FIG. 2).
• the air guide part 4 is made of three cast or injection-molded individual parts, which are welded or glued together after casting or spraying. Because the first air duct part 4, like the second air duct part 6, is preferably made of plastic, the three individual parts can be easily welded or glued together.
• the air filter 200 is designed as an exchangeable cartridge and can be inserted directly into the suction duct 22 of the air routing system 2 which adjoins the air inlet opening 16.
• the cartridge-like design of the air filter 200 enables simple and quick replacement.
• the arrangement of the air filter 200 in the suction channel 22 immediately downstream of the air inlet opening 16 has the advantage that the air is filtered in the entrance area of the air guidance system 2 and the unfiltered air containing untreated air space of the air duct system 2 is limited to a minimum volume range. Contamination of the air routing system 2 is therefore avoided even under extreme operating conditions.
• the air filter 200 is designed in the shape of a hollow cylinder.
• the air filter 200 radially surrounds an inner chamber 201 that extends in the axial direction of the suction channel 22 inside the air filter 200, the air filter 200 separating a peripheral outer space 202 from the inner space 201 (FIGS. 1, 2).
• the suction channel 22 has a cover 203 (FIG. 1) which, in the exemplary embodiment, comprises an intake port 204 in which the air inlet opening 16 is formed.
• the cover 203 is connected to a flange 205 of the suction channel 22 e.g. connected by screwing (Fig. 1) and is opposite the flange 205 e.g. sealed by inserting an O-ring or another suitable sealant.
• the cover 203 also serves as a holder for the air filter 200 inserted in the suction channel 22.
• the cover 203 has suitable holding devices, e.g. in the form of a preferably radially circumferential projection 206.
• the air filter 200 is locked on the outside of this projection 206 at its end 207 facing the cover 206, in which the projection 206 encloses the air filter 200 on the outside.
• the wall 208 of the suction channel 22 opposite the cover 203 has a corresponding holding device in order to lock the air filter 200 at its end 209 opposite the cover 203.
• this holding device is designed as a radially circumferential projection 210 which surrounds the inside of the air filter 200 at its end 209 opposite the cover 203 (FIG. 1).
• the cover 203 has to be removed, after which the air filter 200 is freely accessible and can be gripped.
• the air filter 200 is inserted, it is inserted into the suction channel 22 and plugged onto the projection 210.
• the cover 203 is then placed on the flange 205, so that the air filter 200 is simultaneously inserted into the radial inner region of the projection 206.
• the procedure can also be such that the air filter 200 first enters the radial inner region of the projection 206 of the cover 203 used and in this way the air filter 200 is clamped with the cover 203.
• the air filter 200 is then inserted into the suction channel 22 until the cover 203 abuts the flange 205 and at the same time the end 209 of the air filter 200 opposite the cover 203 is gripped by the projection 210.
• the guidance of the air filter 200 in the suction channel 22 can be facilitated in that the projections 210 have conical regions 211 which center the air filter 200 (FIG. 1).
• the unfiltered air area of the air guiding system 2 designed according to the invention only includes the air inlet opening 16 and the inner chamber 201 of the air filter 200. Any dirt particles that are sucked in are retained by the air filter 200 and either adhere to the filter material or accumulate in the inner chamber 201 if the suction air is heavily contaminated.
• the air filter 200 designed as an exchangeable cartridge the dirt particles that may have accumulated in the inner chamber 201 together with the air filter 200 are therefore removed from the suction channel 22, so that contamination of the air guidance system 2 when changing the air filter 200 is effectively avoided.
• the volume of the raw air area is limited to the minimum, so that the air guiding system 2 is not contaminated at any point and can therefore be operated maintenance-free even under extreme operating conditions.
• the integration of the air filter 200 into the suction channel 22 or the functional expansion of the suction channel 22 as a filter housing for the air filter 200 further increases the degree of integration of the air routing system 2 and achieves a particularly compact design with optimal use of the available installation space 100.
• the exemplary embodiment shown in FIG. 1 is further characterized in that the suction duct 22 together with the air filter 200 is arranged in the region 38 passed through the ducts 32, 32a, 32b, 32c of the helically shaped arc region 40. This enables a particularly space-saving, compact design of the air guidance system 2.
• the air flow in the air guiding system 2 is illustrated by corresponding arrows in FIGS. 1 and 2 for a better understanding of the invention. It is clear here that the unfiltered air first flows in and through the air inlet opening 16 of the inner chamber 201 then with a radially outward flow component through the air filter
• FIG. 4 A further exemplary embodiment of the invention is illustrated in a schematic diagram in FIG. 4.
• the air flow is guided such that the air flows from the peripheral outer chamber 202 with a radially inwardly directed flow component through the air filter 200 into the axial inner chamber 201.
• the radial flow direction through the air filter 200 is therefore reversed compared to the exemplary embodiment described above.
• the air inlet opening 16 is arranged on the outside in the cover 203, so that the sucked-in air initially flows into the peripheral outer chamber 202.
• the cleaned air is discharged from the axial inner chamber 201 via a suction channel outlet opening 220 located at the end 209 of the air filter 200 opposite the cover 203.
• the wall 208 of the suction channel 22 has a tubular outlet connection 221, in which the suction channel outlet opening 220 is formed.
• the air flow is illustrated by corresponding arrows in Fig. 4.
• the cover 203 can be attached to the flange 205 by means of quick-release clamping elements, e.g. be connected by locking clips 222 which are only shown schematically.
• the outlet port 221 also serves as a holding device for the end 209 of the air filter 200 opposite the cover 203.
• the cover 203 has a projection 223. In this way, the air filter 200 is locked centrally in the suction channel 22.
• FIG. 5 shows a realization of the exemplary embodiment shown only schematically in FIG. 4 on an air guidance system 2, which has essentially the same basic structure as the exemplary embodiment shown in FIG. 1.
• a cup-shaped filter holder 230 is integrally formed on the inside of the cover 203.
• the filter holder 230 locks the air filter 200 at its end 207 facing the cover 203.
• the filter holder 230 has an end plate 231 which covers the interior 201 of the Air filter 200 seals from a pre-filter space 232 adjoining the air inlet opening 16.
• the cup-shaped filter holder 230 also has through openings 233 in order to connect the pre-filter space 232 connected to the air inlet opening 16 to the peripheral outer space 202 of the air filter 200.
• the sucked-in unfiltered air first flows through the air inlet opening 16 into the prefilter chamber 232 and then via the outlet openings 233 into the peripheral outer space 202 of the air filter 200.
• the air then flows through the air filter 200 with a radially inward flow component, as already described in FIG Fig. 4 has been illustrated.
• the filtered air flows into the post-filter space 26 via a manifold 234, which is connected to the axial interior 201 via a connection opening 235.
• the further course of the air flow corresponds to the flow course already explained with reference to FIG. 1.
• the manifold 234 is sealed via the housing seal 76 and an additional seal 236 to the second air guide part 6.
• the air filter 200 does not have to be hollow-cylindrical. It is e.g. readily conceivable to design the air filter 200 with a rectangular cross section, in particular a square cross section.
• the air filter 200 can furthermore be completely closed on one of its two end faces in a kind of bag-shaped design.
• a bag-shaped air filter 200 in the suction channel 22 in such a way that it is inflated by the raw air flowing in via the air inlet opening 16 in a manner similar to that of a vacuum cleaner. It may be sufficient to fasten the air filter 200 in a sealing manner only in the cover 203, so that the bag-shaped air filter 200 is pulled out of the suction channel 22 when the cover 203 is removed.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Geometry (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)

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Publications (1)

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• 1996
  • 1996-12-06 DE DE19650806A patent/DE19650806A1/de not_active Withdrawn
• 1997
  • 1997-09-24 WO PCT/DE1997/002162 patent/WO1998025022A1/de not_active Application Discontinuation
  • 1997-09-24 US US09/117,845 patent/US6227159B1/en not_active Expired - Fee Related
  • 1997-09-24 EP EP97909182A patent/EP0879350A1/de not_active Withdrawn
  • 1997-09-24 JP JP10525029A patent/JP2000504391A/ja active Pending
  • 1997-09-24 BR BR9707487A patent/BR9707487A/pt not_active Application Discontinuation
  • 1997-09-24 KR KR1019980705857A patent/KR19990082135A/ko not_active Application Discontinuation

Non-Patent Citations (1)

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