• 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:
    An air purifier (10) comprising a housing (11) in which an inner cylindrical filter (13) and an outer cylindrical filter (12) are housed, the housing having a housing body (11A) defining an opening end surface closed by means of a cover element (14 ). The housing (11) comprises an air inlet (15) arranged to an outer periphery of the housing body (11A) for supplying outside air and an exhaust outlet (16) arranged to a bottom (111) of the housing body (11A) at a downstream side in an air flow direction for discharging the air supplied through the air inlet (15) and filtered through the inner cylindrical filter (13) and the outer cylindrical filter (12). A mass flow meter sensor (19) is arranged in the exhaust outlet (16) for measuring the flow rate of the air. A flow direction grille (18) is provided at the upstream side of the mass flow meter sensor (19) to direct the flow of air. (Fig. 1.)
    公开号:SE1150172A1
    申请号:SE1150172
    申请日:2009-07-21
    公开日:2011-02-25
    发明作者:Kanji Namimatsu；Tomohiro Shimazu；Tadashi Iijima
    申请人:Komatsu Mfg Co Ltd；
    IPC主号:
    专利说明:

    Summary of the Invention Problems to be Solved by the Invention In large diesel engines used in a construction machine, it has been known to use an air purifier provided with a concentric inner cylindrical filter and outer cylindrical filter, and a housing for housing these filters in order to improve the efficiency of the air purifier in trapping dust in the air.
    With this air purifier, since the supplied outer air is filtered through a double-layered structure of the inner filter and the outer filter, the purity of the air can be improved.
    In the air purifier, the inner cylindrical filter is generally fixed in the housing housing of the filters, but the outer filter can be placed depending on the dirt of the filter.
    The flow of air inside the housing of the air purifier may change slightly depending on the variation of the filter papers of the outer cylindrical filter or the positional relationship between the fixed inner cylindrical filter and the mounted outer cylindrical filter inside the housing. Thus, when the technique described in the above-mentioned patent literature is easily mounted, the flow rate of the air can not be measured with high accuracy by using the mass flow meter.
    An object of the invention is to provide an air purifier and an engine control system which are capable of measuring with high accuracy the flow rate of air discharged from the air purifier and a significant improvement in the purity of air after filtration.
    The means for solving the problems According to one aspect of the invention, an air purifier which takes outside air and discharges the air after removing dust from the air is provided, which air purifier comprises an inner cylindrical filter and an outer cylindrical filter which are concentrically arranged, and a housing in the inner cylindrical filter and the outer cylindrical filter being housed, the housing having a bottomed cylindrical body defining an opening end surface closed by a cover member, in which the housing comprises a tube on the upstream side and a tube on the downstream side, wherein the tube on the upstream side is arranged on an outer periphery of the bottom cylindrical body and feeds the outside air into the housing, the tube on the downstream side is arranged on a substantial center of a bottom of the bottom cylindrical body defined at a downstream side in an air flow direction, and the tube on the downstream side, the air fed through the pipe on the upstream side and filtered out through the inner cylindrical filter and the outer cylindrical filter, a mass flow meter being arranged in the tube on the downstream side to measure the flow rate of the air in the tube on the downstream side, and a flow direction grille is provided on an upstream side of the mass flow meter for directing the flow meter. the tube on the downstream side, which is a outer diameter grid having an outer diameter larger than an inner diameter of the tube on the downstream side, and is inserted between the bottom and the inner cylindrical filter while being held by a resin material.
    The flow direction grille is made of metal mesh, perforated metal or Hknande.
    In the above-mentioned aspect, it is advantageous that the flow direction grid has an outer diameter substantially equal to or larger than a pipe diameter of the pipe on the downstream side and is mounted between the bottom and the inner cylindrical filter.
    The flow direction grille may be welded between the bottom and the inner cylindrical filter.
    In the above-mentioned aspect, it is advantageous that the inner filter has an inner diameter substantially equal to or larger than an inner diameter of the pipe on the downstream side.
    In the above-mentioned aspect, it is advantageous that the directional grid is provided with a metal mesh grid element and has a space ratio in a range from 30% to 50%.
    Referring to Fig. 2, the space ratio (%) is achieved by the following equation (1). space ratio (%) = (B2 / A2) x 1oo ... ei In the above aspect, it is advantageous that the flow direction grid is formed by weaving threads having a thread diameter equal to or greater than 0.2 mm in a grid pattern. 10 15 20 25 30 4 By the wire diameter is meant the thickness of the wires that form the des directional grid.
    According to another aspect of the invention, there is provided an engine control system, which engine control system comprises an EGR valve inserted into an exhaust gas recirculation path through which a portion of the exhaust gas from an engine is returned to an inlet side, air trainer described above, a turbocharger driven by engine exhaust a variable geometry turbocharger takes and compresses the air filtered by the air purifier and discharges the air to the engine, and a control device that controls the EGR valve and the variable geometry turbocharger, in which the control device comprises a flow rate detecting section which detects a signal from the mass flow meter arranged to the air purifier, a section which controls the degree of opening of the EGR valve which performs a control of the degree of opening of the EGR valve, and a section which controls the degree of opening of a nozzle which performs a control of the degree of opening of a nozzle arranged in the variable geometry turbocharger, and varvid sekti the control degree of opening of the EGR valve and section controlling the degree of opening of the nozzle performs the control of the degree of opening of the EGR valve and the control of the degree of opening of the nozzle according to the signal detected by the flow rate detecting section.
    With the above aspect, since the flow direction grille is arranged at the upstream side of the mass flow meter, the flow of air inside the tube on the downstream side can be directed and consequently the flow rate can be measured with higher accuracy by using the mass flow meter. A double layer structure defined by the inner cylindrical filter and the outer cylindrical filter improves the filtration efficiency and thus the purity of the discharged air.
    Since the flow direction grille is mounted between the bottom and the inner cylindrical filter, the air that has passed through the inner cylindrical filter is directed through the flow direction grid. Thus, even when the flow of air changes due to the positional relationship between the inner cylindrical filter and the outer cylindrical filter or the like, the flow of air is directed through the flow direction grid and thus a turbulent flow or an uneven flow of the air inside the tube is avoided. on the downstream side. The inner diameter of the inner cylindrical filter is substantially equal to or larger than that of the downstream pipe. It is thus possible to prevent turbulence in the flow of air from the inner cylindrical filter to the pipe on the downstream side as a result of the expansion of the flow, whereby a turbulent flow or an uneven flow inside the pipe on the downstream side is reliably prevented.
    With the flow direction grid, which has a 30% to 50% space ratio or has a wire diameter of 0.2 mm or larger, it is possible to improve the accuracy of a flow rate value measured by the mass flow meter while preventing pressure loss of the flow of air in the air purifier. When the wire diameter is selected at 0.2 mm or larger, it is possible to prevent damage to the directional grid due to wear of metal wires forming the flow direction grid after prolonged use, or breakage or the like of the mesh caused when foreign substances penetrate.
    The flow rate detecting section of the control device detects the detection signal from the mass flow meter and the calculated flow rate. In accordance with the calculated flow rate, the degree of valve opening of the EGR valve arranged in the exhaust gas return path and the degree of opening of the nozzle of the variable geometry turbocharger are controlled. Since the mass flow rate of the directed air is measured, an accurate EGR control can be performed in accordance with the mass flow rate of the air, whereby the engine can be advantageously controlled.
    Brief Description of the Drawings Fig. 1 is a cross-sectional view showing an air purifier according to an exemplary embodiment of the invention.
    Fig. 2 is an enlarged view showing a flow direction grille used in the air purifier.
    Fig. 3 is a schematic view showing an engine control system according to the exemplary embodiment.
    Fig. 4 is a block diagram showing the engine control system. Fig. 5 is a flow chart of the engine control system.
    Fig. 6 is a graph showing ratios of the space ratio of the flow direction grille to error ratio and pressure loss in case 1 (15 inches).
    Fig. 7 is a graph showing ratios of the space ratio of the flow direction grille to error ratio and pressure loss if 2 (13 inches).
    Fig. 8 is a graph showing ratios of the space ratio of the flow direction grille to error ratio and pressure loss if 3 (11 inches).
    Fig. 9 is a graph showing ratios of the space ratio of the flow direction grille to error ratio and pressure loss in case of 4 (10 inches).
    Description of Embodiments An exemplary embodiment of the invention will be described below with reference to the accompanying drawings.
    Structure of the air purifier 10 Fig. 1 is a cross-sectional view showing an air purifier 10 according to this exemplary embodiment.
    The air purifier 10 is an air flow device that takes outside air and discharges the air after removing dust from the air so that the dust-free air is fed to an engine or the like. The air purifier 10 comprises a housing 11, an outer cylindrical filter 12, an inner cylindrical filter 13 and a flow direction grille 18. The outer cylindrical filter 12 and the inner cylindrical filter 13 are concentrically arranged inside the housing 11.
    The housing 11 houses the outer cylindrical filter 12 and the inner cylindrical filter 13 through which the air is filtered and comprises a housing body 11A and a cover element 14 which closes an opening end surface of the housing body 11A.
    The housing body 11A is a bottomed cylindrical body made of synthetic resin or the like. The cover element 14 is a disc-shaped body which covers the opening end surface of the housing body 11A. A protrusion 141 projecting in a direction out of the plane is formed on an outer periphery of the cover member 14.
    The protrusion 141 engages an outer peripheral surface of the housing body 11A.
    The outer peripheral surface of the housing body 11A is provided with an air inlet 15 as a tube on the upstream side through which external air is fed into the housing 11. The air inlet 15 is arranged eccentrically to the center of the housing body 11A. The air is directed to an outer peripheral surface of the outer cylindrical filter 12. The opening end surface of the housing body 11A, which defines an opening, is closed by the cover member 14. The essential center of the bottom 111 of the housing body 11A is provided with an exhaust outlet 16 as a downstream pipe through which the air filtered through the outer cylindrical filter 12 and the inner cylindrical filter 13 is discharged. With the above-mentioned arrangement, when the outer cylindrical filter 12 is worn with dust, the cover element 14 is removed to replace the cylindrical filter 12. An inner surface of the bottom 111 of the housing body 11 is provided with an annular projecting part 17 which projects annularly and has a diameter larger than an inner diameter of the exhaust outlet 16. The inner cylindrical filter 13, which will be described later, engages the annular projecting part 17.
    The outer cylindrical filter 12 includes a cylindrical portion 122 which is formed in a cylindrical shape by bellows winding a universal filter for filtering the air supplied in the housing 11, an annular holder 123 made of urethane holding a first end of the cylindrical portion 122, and a circular holder 124 made of urethane holding a second end of the cylindrical portion 122.
    The annular holder 123 is in contact with the bottom 111 of the housing 11 and is releasably attached to an outer peripheral surface of the annular protruding portion 17. A protruding portion 125 is formed on an outer surface of the circular holder 124. The protruding portion 125 is in contact specifically, when the cover member 14 biases the protruding portion 125 after replacement of the outer cylindrical filter 12, the circular holder 124 made of urethane (elastic body) shrinks so that the cover member 14 and the circular holder 124 come into close contact with each other. Furthermore, since the protruding portion 125 is biased, the annular holder 123 made of urethane (elastic body) is pressed against the bottom 111 so that the bottom 111 and the annular holder 123 come into close contact with each other. As a result, the air supplied through the air inlet 15 is directed only to an outer peripheral surface of the cylindrical portion 122. The inner cylindrical filter 13 acts to further filter the air filtered through the outer cylindrical filter 12 and to prevent unfiltered air from flowing into the downstream side at the time of replacement of the cylindrical filter 12.
    The inner cylindrical filter 13 is housed in a hollow space 121 defined by the outer cylindrical filter 12 and comprises a cylindrical portion 131 formed in a cylindrical shape by bellows winding a universal filter in the same manner as in the outer cylindrical filter 12, a circular holder 132 made of urethane holding the first end of the cylindrical portion 131, and an annular holder 133 made of urethane holding the second end of the cylindrical portion 131.
    An annular protruding portion 134 is formed on an outer surface of the circular holder 132. The protruding portion 134 is in contact with the circular holder 124 of the outer cylindrical filter 12. The annular holder 133 is fitted and fixed to an inner peripheral surface of the circular holder. the annular protruding part 17.
    Inner and outer peripheral surfaces of the outer cylindrical filter 12 and the inner cylindrical filter 13 are covered by metal mesh plates (not shown).
    The metal meshes are welded at both ends of the outer cylindrical filter 12 and the inner cylindrical filter 13 to be in a cylindrical shape. The positional conditions of the welded portions of the outer cylindrical filter 12 and the inner cylindrical filter 13 are one of the factors which change the flow of air inside the housing 11.
    The flow directing grid 18 acts to direct the flow of the filtered air to be discharged from the housing 22 and is formed by weaving stainless steel wires in a grid pattern. A complete outer periphery of the fate grating 18 is resin-shaped. The flow direction grid 18 is welded to the annular protruding portion 17 via a resin material 181.
    The circular holder 124 of the outer cylindrical filter 12 biases the projecting portion 134 of the inner cylindrical filter 13 so that the circular holder 124 made of urethane (elastic body) and the circular holder 132 come into close contact with each other. Since the protruding portion 134 is biased by the circular holder 124, the resin material 181 is biased by the annular holder 133 so that the annular holder 133 and the resin material 181 come into close contact with each other and thus firmly hold the flow direction grating 18. As a result, deformation of the flow guide 18.
    The flow direction grille 18 selected for use in this exemplary embodiment has a small value obtained by dividing a difference between a mass flow rate pre-measured at the air inlet 15 (actual flow rate) and a mass flow rate measured at the exhaust outlet 16 (measured flow rate) with the actual flow rate. hereinafter referred to as error ratio) and a low pressure drop through the flow direction grille 18. Accordingly, according to this exemplary embodiment, the fate direction grid 18 has the following specifications, 30 meshes, a tree diameter of 0.29 mm, and a space ratio of 43.2%.
    The term "stitch" means a unit that indicates the number of stitches in a square inch. The term “space ratio” is calculated by means of the above-mentioned equation (1) with reference to Fig. 2. The reasons why the flow direction grille 18 having the above-mentioned specification is used will be described.
    The flow direction grille 18 may be made of any material other than stainless steel, such as nickel, aluminum or copper, and may be provided by perforated metal adjusters for metal mesh.
    In this exemplary embodiment, the inner diameter of the inner cylindrical filter 13 is substantially equal to or larger than the inner diameter of the exhaust outlet 16. When the air filtered through the outer cylindrical filter 12 and the inner cylindrical filter 13 passes through the inside of the inner cylindrical filter 13 to is discharged to the exhaust outlet 16, since the inner diameter of the inner cylindrical filter 13 is substantially equal to or larger than the inner diameter of the exhaust outlet 16, it is possible to prevent turbulence in the flow of air from the inner cylindrical filter 13 to the exhaust outlet 16 due to the expansion of the flow, thereby avoiding a turbulent flow or the like.
    The flow direction effect can work on the flow of air. A mass flow rate sensor 19 as a mass flow meter for measuring the fate rate of the air passing through the exhaust outlet 16 is attached to the exhaust gas outlet 16. When measuring the flow rate of the air, the mass flow rate sensor 19 generates a detection signal and outputs a detection signal. 30.
    When the air is fed into the housing 11 through the air inlet 15 of the air cleaner 10, the outside air is filtered first through the outer cylindrical filter 12 and then through the inner cylindrical filter 13. The flow of the filtered air is directed through the flow direction grille 18 and discharged from the exhaust outlet 16. .
    Structure of motor control system Fig. 3 is a schematic view illustrating a motor control system 20 according to this exemplary embodiment.
    The engine control system 20 comprises a diesel engine 21 (hereinafter simply referred to as an engine), a variable geometry turbocharger 24, an EGR line 25 as an exhaust return path, an EGR cooler 26 and an EGR valve which are both inserted into the EGR line, The air purifier 10, the mass flow rate sensor 19 as a mass flow meter, and the control device 30.
    The variable geometry turbocharger 24 connected to an inlet line 22 and an exhaust line 23 includes a compressor 241 inserted into the inlet line 22 through which air is supplied to the engine 21 and a turbine 242 inserted into the exhaust line 23 through which exhaust from the engine 21 is discharged.
    The turbine 242 is driven by the exhaust gas from the engine 21. Supplied air is supercharged by the compressor 241, which is rotated together with the rotation of the turbine 242, and is fed to the engine 21 through a aftercooler 28.
    The variable geometry turbocharger 24 is equipped with an opening degree adjustment mechanism for adjusting an opening degree of the nozzle (not shown). The controller 30 outputs a signal to the aperture adjustment mechanism to control the aperture of the nozzle.
    The EGR line 25 is the exhaust return path branched from the exhaust line 23. The EGR line 25 short-circuits the inlet line 22 and the exhaust line 23 so that a portion of the exhaust gas from the engine 21 is extracted to be fed to the inlet line 22 for returning the exhaust gas. The EGR cooler 26 for cooling the exhaust gas to be returned to the inlet side and the EGR valve 27 are inserted in the EGR line 25.
    The EGR valve 27 is provided with a solenoid valve configured to open and close in response to the signal output from the controller 30 so that the degree of opening is controlled.
    The mass flow rate sensor 19 is equipped with a universal mass air flow meter (MAF sensor). The mass flow rate sensor 19, which measures the flow rate of the air passing through the exhaust outlet and outputs a detection signal to the control device 30, is attached to the downstream side of the air purifier 10.
    Structure of the control device 30 Fig. 4 is a block diagram of the control device 30 used in the engine control system 20. As shown in Fig. 3, the control device 30 is electrically connected to each of the opening degree adjusting mechanism of the variable geometry turbocharger 24, the EGR valve 27. respectively, the mass flow rate sensor 19 for controlling the EGR valve 27 and the nozzle (illustration omitted) of the variable geometry turbocharger 24 in accordance with the detection signal output from the mass flow rate sensor 19.
    The control device 30 comprises a flow rate detecting section 31, a section which controls the degree of opening of the EGR valve 32 and a section which controls the degree of opening of the nozzle 33.
    As shown in Fig. 4, when the detection signal output from the mass flow rate sensor 19 is detected, the flow rate detecting section 31 calculates a mass flow rate and outputs the mass flow rate to the section controlling the degree of opening of the EGR valve 32 and the section controlling the degree of opening 33 of the nozzle.
    Section that controls the degree of opening of the EGR valve 32 calculates the degree of opening of the EGR valve 27 based on the mass flow rate based on the mass flow rate output from the d velocity detecting section 31 and outputs a signal to the degree of opening adjustment mechanism. The description will be made with reference to a flow chart of the engine control system 20 shown in Fig. 5. The mass flow rate sensor 19 measures the flow rate of air passing through the exhaust outlet 16 and outputs the detection signal to the flow rate detecting section 31 of the control unit 30. calculates the flow rate based on the detection signal (S1). Upon receiving the calculated flow rate output from the flow rate detecting section 31, the section controlling the opening degree of the nozzle 33 calculates the degree of opening of the nozzle of the variable geometry turbocharger 24 based on this flow rate (S2) and outputs the signal to the opening degree adjusting geometry method, upon receiving the calculated flow rate output from the flow rate detecting section 31, the section controlling the opening degree of the EGR valve 32 calculates the opening degree of the EGR valve 27 based on this fate rate (S3) and outputs the signal to the EGR valve 27. Consequently, the opening degree adjustment mechanism of the variable geometry turbocharger 24 the opening degree of the nozzle to the calculated opening degree of the nozzle (S4). Similarly, the EGR valve 27 adjusts the opening degree of the EGR valve 27 to the calculated opening degree of the EGR valve 27 (S5).
    According to this exemplary embodiment, the flow direction grille 18 has a smaller error ratio between the mass flow rate of the air measured by the mass flow sensor 19 and the mass flow rate of the air measured in advance at the air inlet 15 and a low pressure loss is selectively used. Thus, regardless of the positional relationship between the outer cylindrical filter 12 and the cylindrical inner filter 13, or the like, the flow rate of the air discharged from the air purifier 10 can be measured with greater accuracy. In the housing 11 of the air purifier 10, the outer cylindrical filter 12 and the inner cylindrical filter 13 are housed to provide a double layer structure. Dust or the like is thus reliably removed from the supplied outside air, thereby improving the purity of the air. The motor 21 is controlled based on the flow rate of the air measured with a high accuracy. The control device 30 can thus perform a more accurate EGR control.
    The specification of the flow direction grille 18 used in this exemplary embodiment is determined based on the following experimental results.
    The experiment was performed as follows for each of cases 1 to 4 which differ in the size of the air purifier 10. The sizes of cases 1 to 4 are 15 inches, 13 inches, 11 inches and 10 inches, respectively.
    Experiments A plurality of sample flow directional grids are individually selected in the air purifier 10 in the same manner as in the above exemplary embodiment. The sample flow direction grids used for the experiment are listed in Tables 1 to 4. At the time of attachment or removal of the outer cylindrical filter 12 for replacement, for example, the attachment position of the outer cylindrical filter 12 may be shifted or the like so that the flow of air changes and consequently an error in the flow rate occurs. Accordingly, in this experiment, an error ratio (%) and a pressure drop (kPA) were measured each 45-degree rotation of the outer cylindrical filter 12 to use the flow direction grid 18 having the smallest error ratio (%). The result is shown in Figs. 6-9.
    By the “free space (mm)” indicated in Tables 1 to 4 is meant a dimension between trees B shown in Fig. 2.
    Table 1 Case 1 (15 inches) Tree diameter ø (mm) - 0.20 0.37 0.20 0.29 0.06 0.12 Mesh - # 20 # 20 # 40 # 30 # 150 # 80 Free space (mm ) - 1.07 0.90 0.44 0.56 0.11 0.20 Space ratio (%) 100 71.0 50.2 46.9 43.2 41.7 38.7 10 15 20 14 Tabe | 2 Case 2 (13 inches) Tree diameter (mm) - 0.20 0.20 0.37 0.20 0.29 0.12 Mesh - # 20 # 30 # 20 # 40 # 30 # 80 Free space (mm) - 1 .07 0.65 0.90 0.44 0.56 0.20 Space ratio (%) 100 71.0 58.3 50.2 46.9 43.2 38.7 Tabe | 3 Case 3 (11 inch) Tree diameter ø (mm) - 0.37 0.29 0.12 Mesh - # 20 # 30 # 80 Free space (mm) - 0.90 0.56 0.20 Space ratio (%) 100 50.2 43, 2 38.7 Tabe | 4 Fa | 4 Träddiameterø (mm) - 0,37 0,29 0,06 0,12 Maska - # 20 # 30 # 150 # 80 Frittutrymme (mm) - 0,90 0,56 0.11 0.20 Space ratio (%) 100 50.2 43.2 41.7 38.7 With reference to the graphs of the measurement results shown in Figs. 6-9, the following can be understood. 1. It is obvious that the pressure loss (kPa) tends to increase when the space ratio becomes smaller, and this tendency is amplified when the space ratio is less than 40%, and the pressure loss becomes too large to supply a sufficient amount of air to the inlet line 22 when the space ratio it falls below 30%. 2. It is revealed that while the error ratio tends to increase when the spatial ratio becomes higher as a whole, the error ratio decreases to the lowest value when the spatial ratio is in a range from 40% to 50%. 3. In order to allow the air purifier 10 to become sufficiently effective, it is preferable to use a fate direction grating having a space ratio equal to or greater than 30%, at which the pressure loss is prevented from becoming too large, but not exceeding 50 %, at which the error ratio may be at its lowest.
    Below, the respective results shown in Figs. 6-9 will be described with reference to Tables 1 to 4.
    However, reference to the graph in case 1 (15 inches) shown in Fig. 6, is a sample having the lowest error ratio and the third lowest space ratio optimally. Specifically, with reference to Table 1, a flow directional grid having a thread diameter of 0.29 (mm) and 30 meshes is optimal.
    However, reference to the graph in case 2 (13 inches) shown in Fig. 7, is a sample having the lowest error ratio and the second lowest space ratio optimally. Specifically, with reference to Table 2, a flow direction grid having a wire diameter of 0.29 (mm) and 30 meshes is optimal.
    But reference to the graph in case 3 (11 inches) shown in Fig. 8, is a sample having the lowest error ratio and the third lowest space ratio optimally. Specifically, with reference to Table 3, a flow directional grid having a wire diameter of 0.29 (mm) and 30 meshes is optimal.
    But reference to the graph in case 4 (10 inches) shown in Fig. 9, is a sample having the lowest error ratio and the third lowest space ratio optimally. Specifically, with reference to Table 4, a flow directional grid having a wire diameter of 0.29 (mm) and 30 meshes is optimal.
    In the light of the above result, to reduce the pressure loss (kPa) to a certain extent while the error ratio is equal to or lower than two (%) and the space ratio is in a range from 30 (%) to 50 (%), a flow directional grid having a tree diameter of 0.29 (mm) and 30 meshes optimally independent of the size of the air purifier. Incidentally, the space ratio is 43.2 (%). Although the best arrangement, method and the like for carrying out the invention have been described above, the invention is not limited thereto. In other words, although a particular embodiment of the invention is substantially illustrated and described, a number of modifications may be made by those skilled in the art to the forms, amounts and other detailed arrangements of the embodiment described above without departing from the scope of the invention. .
    Accordingly, the above-described forms, amounts and the like are exemplary to facilitate the understanding of the invention and do not limit the scope of the invention. The description by name of various elements without all or part of limitations in terms of forms or amounts are included within the scope of the invention.
    In the above exemplary embodiment, although no treatment device is provided to the exhaust line 23, an exhaust treatment device, such as a DPF (diesel particulate filter), may be provided at the downstream side of the variable geometry turbocharger 24.
    Industrial applicability The air purifier and engine control system according to the invention are advantageously applicable to a construction machine, a soil transfer machine, an agricultural machine, a power generator, a transport vehicle and the like.
    Explanation of reference numerals 10 ... air purifier, 11 ... housing, 11A ... housing body (bottom cylindrical body), 12 ... outer cylindrical filter, 13 ... inner cylindrical filter, 14 ... cover elements, 15. ..air inlet (pipes on the upstream side), 16 ... exhaust outlet (pipes on the downstream side), 18. _ .fl fate direction grille, 19. ._mass flow velocity sensor (mass flow meter), 20 ... engine control system, 21 ... engine, 24 ... turbocharger with variable geometry, 25 ... EGR line (exhaust return path), 27 ... EGR valve, 30 ... control device, 31 ... des fate detection section, 32 ... section that controls the degree of opening of the EGR valve, 33 ... section that controls the degree of opening of the nozzle, 111 ... bottom
    权利要求:
    Claims (6)
    [1]
    An air purifier which takes external air and discharges the air after removing dust from the air, which air purifier comprises an inner cylindrical filter and an outer cylindrical filter which are concentrically arranged, and a housing in which the inner cylindrical filter and the outer cylindrical filter are housing, which housing has a bottomed cylindrical body defining an opening end surface closed by means of a cover element, the housing comprising a tube on the upstream side and a tube on the downstream side, the tube on the upstream side being arranged on an outer periphery of the bottomed cylindrical body and supplying the outside air in the housing, the downstream side tube is arranged at an essential center of a bottom of the bottomed cylindrical body defined at a downstream side in an air flow direction, and the downstream side pipe discharges the air supplied through the upstream side tube and filtered through the inner cylindrical filter and the outer cylindrical filter, a mass flow meter ä is arranged in the downstream side pipe to measure the velocity of the air in the downstream side pipe, and a fate direction grid is provided at an upstream side of the mass flow meter to direct the flow in the downstream side pipe, which flow direction grid has an outer diameter larger than an outer diameter of the tube on the downstream side, and is inserted between the bottom and the inner cylindrical filter while being held by a resin material.
    [2]
    Air purifier according to claim 1, wherein the flow direction grid has an outer diameter substantially equal to or larger than a pipe diameter of the pipe on the downstream side and is mounted between the bottom and the inner cylindrical filter.
    [3]
    Air purified according to claim 1 or 2, wherein the inner cylindrical filter has an inner diameter substantially equal to or greater than an inner diameter of the pipe on the downstream side. 10 15 20 25 30 18
    [4]
    An air purifier according to any one of claims 1-3, wherein the flow direction grille is provided with a metal mesh grid element and has a space ratio in a range from 30% to 50%.
    [5]
    An air purifier according to claim 4, wherein the flow direction grid is formed by weaving threads having a thread diameter equal to or greater than 0.2 mm in a grid pattern.
    [6]
    An engine control system, comprising an EGR valve inserted into an exhaust gas recirculation path through which a portion of the exhaust gas from an engine is returned to an inlet side, the air purifier according to any one of claims 1-5, a turbocharger driven by engine exhaust, the turbocharger having variable geometry takes and compresses the air filtered by the air purifier and discharges the air to the engine, and a control device which controls the EGR valve and the variable geometry turbocharger, the control device comprising a flow rate detecting section which detects a signal from the mass meter measured to the air purifier, section that controls the degree of opening of the EGR valve which performs a control of the degree of opening of the EGR valve, and a section which controls the degree of opening of a nozzle which performs a control of the degree of opening of a nozzle arranged in the variable geometry turbocharger, and the section of degree of EGR valve and section that controls opening the degree of the nozzle performs the control of the degree of opening of the EGR valve and the control of the degree of opening of the nozzle in accordance with the signal detected by the flow rate detecting section.
    类似技术:
    公开号 | 公开日 | 专利标题
    SE1150172A1|2011-02-25|Air purifier and engine control system
    CA2638002C|2011-05-17|Airflow reducing and redirecting arrangement for industrial baghouse
    EP3020954B1|2018-02-14|Air intake system for an off-road vehicle
    EP2537571A1|2012-12-26|Inlet air pulse filtration system
    WO2010113295A1|2010-10-07|Particulate matter concentration measuring device
    US20160010601A1|2016-01-14|Air filtration element
    JP2015503702A|2015-02-02|Method and arrangement for cleaning particle filters
    US10006416B2|2018-06-26|Air filter
    WO2010113293A1|2010-10-07|Particulate matter concentration measuring apparatus
    US9084956B2|2015-07-21|Dust collector with monitor air filter
    US20100199616A1|2010-08-12|Gas filtering apparatus
    US3199488A|1965-08-10|Dust and liquid detector
    JP2011226824A|2011-11-10|Exhaust sensor
    US10208717B2|2019-02-19|Intake apparatus and dump truck
    RU2483780C1|2013-06-10|Electrostatic precipitator with filtration elements
    KR20170058172A|2017-05-26|Air cleaner for work vehicle
    US20050011172A1|2005-01-20|Filter unit
    JP2013067899A|2013-04-18|Fiber dust-recovering device of fiber machine
    JP4957847B2|2012-06-20|Exhaust gas purification device for internal combustion engine
    RU138739U1|2014-03-20|GRID METAL FABRIC FILTER FOR HIGH-TEMPERATURE CLEANING OF A FLUID FROM SOLID PARTICLES
    EP3409923B1|2020-07-01|System for condition-based monitoring of filters
    JP2012110861A|2012-06-14|Hollow fiber membrane cartridge for gas purification
    US20210164424A1|2021-06-03|Air cleaner
    JP2011075538A|2011-04-14|Apparatus for measurement of fine particle concentration
    JP6171859B2|2017-08-02|Air cleaner
    同族专利:
    公开号 | 公开日
    JP5219679B2|2013-06-26|
    WO2010013613A1|2010-02-04|
    CN102105667A|2011-06-22|
    US8844286B2|2014-09-30|
    CN102105667B|2014-08-13|
    KR20110025860A|2011-03-11|
    KR101237844B1|2013-02-27|
    JP2010037977A|2010-02-18|
    US20110219768A1|2011-09-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4013351C2|1989-04-25|1992-09-03|Mitsubishi Jidosha Kogyo K.K.|
    DE59010035D1|1990-05-30|1996-02-15|Siemens Ag|Flow transducer|
    US5253517A|1990-05-30|1993-10-19|Siemens Aktiengesellschaft|Flow converter|
    JPH0510771U|1991-07-16|1993-02-12|日産工機株式会社|Air cleaner with air rectifier|
    US5547480A|1994-01-21|1996-08-20|Donaldson Company, Inc.|Cylindrical air filter with radially directed seal|
    JP3245362B2|1996-08-05|2002-01-15|株式会社日立製作所|Rectifier grid for air flow measurement device|
    JP3713865B2|1997-01-23|2005-11-09|株式会社デンソー|Intake device for internal combustion engine|
    US5953920A|1997-11-21|1999-09-21|Regent Of The University Of California|Tapered pulse tube for pulse tube refrigerators|
    JP3995386B2|2000-04-04|2007-10-24|株式会社デンソー|Intake device|
    JP2001286715A|2000-04-07|2001-10-16|Toyo Element Industry Co Ltd|Filter element and filter apparatus|
    US6797027B2|2001-04-11|2004-09-28|Donaldson Company, Inc.|Filter assemblies and systems for intake air for fuel cells|
    DE10126676A1|2001-06-01|2002-12-05|Bosch Gmbh Robert|Device for determining at least one parameter of medium flowing in pipe has at least one filter installed in pipe to absorb substances in pipe which are harmful to atmosphere|
    US6951697B2|2001-09-11|2005-10-04|Donaldson Company, Inc.|Integrated systems for use with fuel cells, and methods|
    JP2003120445A|2001-10-05|2003-04-23|Tokyo Roki Co Ltd|Air cleaner|
    JP3873742B2|2001-12-28|2007-01-24|いすゞ自動車株式会社|Control device for variable capacity turbocharger|
    JP2003315126A|2002-04-18|2003-11-06|Hitachi Ltd|Air flow meter|
    DE102004000048B4|2004-11-17|2008-08-14|Mann + Hummel Gmbh|air filter|
    US7377954B2|2005-01-27|2008-05-27|Fleetguard, Inc.|Performance air filtration cartridge|
    JP2008106636A|2006-10-24|2008-05-08|Mazda Motor Corp|Abnormality detection device for engine|
    DE102008049806A1|2008-09-30|2010-04-01|Man Nutzfahrzeuge Ag|Arrangement of an air mass flow measuring device in an intake system of an internal combustion engine|
    DE102010029217A1|2010-05-21|2011-11-24|Robert Bosch Gmbh|Device for detecting e.g. mass flow of water in intake system of internal combustion engine of automobile region, has shielding element arranged upstream to inlet opening, and protective tube arranged at distance from opening|
    JP2014218894A|2011-09-05|2014-11-20|株式会社小松製作所|Air cleaner|US8828112B2|2010-09-07|2014-09-09|Hdt Expeditionary Systems, Inc.|Air filter|
    CN102454489A|2010-10-15|2012-05-16|北汽福田汽车股份有限公司|Air rectifying device, and air inlet system for engine|
    US8997450B2|2010-11-22|2015-04-07|Bha Altair, Llc|Filter cartridge assembly for use with turbine engine systems|
    JP5912276B2|2011-03-29|2016-04-27|株式会社クボタ|Air cleaner|
    JP2013053543A|2011-09-02|2013-03-21|Kubota Corp|Air cleaning device|
    JP2014218894A|2011-09-05|2014-11-20|株式会社小松製作所|Air cleaner|
    CN107081026B|2011-10-31|2019-07-23|唐纳森公司|Air cleaner assembly|
    NL2008494C2|2012-03-15|2013-09-18|Global Power Netherlands B V|Screen panel for covering at least partly an air intake opening of an air inlet house of a combustion engine or a compressor.|
    US10914229B2|2012-09-14|2021-02-09|Ford Global Technologies, Llc|Charge air cooler condensation dispersion element|
    DE102013012013A1|2013-07-18|2015-01-22|Mann + Hummel Gmbh|Support tube, filter element and filter system with a support tube and method and apparatus for producing the support tube|
    DE102013218217A1|2013-09-11|2015-03-26|Mahle International Gmbh|air filter|
    CN104747328A|2015-03-06|2015-07-01|广西华原过滤系统股份有限公司|Novel air filter element|
    CN105833641B|2016-04-19|2018-01-02|贾克|Double filter cores reversely rotate hypergravity hydrofilter|
    CN106321410A|2016-08-23|2017-01-11|柳州市国正机电物资有限责任公司|Air filter of compressor|
    DE102019006128A1|2019-08-30|2021-03-04|Deutz Aktiengesellschaft|Suction motor with reflector suction system|
    CN112555068B|2020-12-04|2021-11-12|隆鑫通用动力股份有限公司|Air filter and working machine|
    法律状态:
    2014-05-27| NAV| Patent application has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    JP2008199449A|JP5219679B2|2008-08-01|2008-08-01|Air cleaner and engine control system|
    PCT/JP2009/063017|WO2010013613A1|2008-08-01|2009-07-21|Air cleaner, and engine control system|
    [返回顶部]