EP3339623B1 - Air cleaner for internal combustion engine - Google Patents
Air cleaner for internal combustion engine Download PDFInfo
- Publication number
- EP3339623B1 EP3339623B1 EP17206908.0A EP17206908A EP3339623B1 EP 3339623 B1 EP3339623 B1 EP 3339623B1 EP 17206908 A EP17206908 A EP 17206908A EP 3339623 B1 EP3339623 B1 EP 3339623B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- case
- cap
- inlet duct
- opening
- molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 16
- 238000000465 moulding Methods 0.000 claims description 68
- 238000011144 upstream manufacturing Methods 0.000 description 17
- 230000002093 peripheral effect Effects 0.000 description 11
- 239000003595 mist Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
Images
Classifications
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- 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
- F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
- F02M35/0202—Manufacturing or assembling; Materials for air cleaner 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
- F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
- F02M35/0204—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof for connecting or joining to other devices, e.g. pipes
-
- 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
- F02M35/024—Air cleaners using filters, e.g. moistened
-
- 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
- F02M35/10314—Materials for intake systems
- F02M35/10321—Plastics; Composites; Rubbers
-
- 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
- F02M35/1034—Manufacturing and assembling intake systems
- F02M35/10347—Moulding, casting or the like
-
- 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
- F02M35/1034—Manufacturing and assembling intake systems
- F02M35/10354—Joining multiple sections together
- F02M35/1036—Joining multiple sections together by welding, bonding or the like
-
- 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
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1261—Helmholtz resonators
-
- 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
- F02M35/14—Combined air cleaners and silencers
-
- 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
- F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
- F02M35/0202—Manufacturing or assembling; Materials for air cleaner housings
- F02M35/0203—Manufacturing or assembling; Materials for air cleaner housings by using clamps, catches, locks or the like, e.g. for disposable plug-in filter cartridges
Definitions
- the present invention relates to an air cleaner for an internal combustion engine.
- an air cleaner for filtering intake air is provided.
- a conventional typical air cleaner includes a case having an opening and an inlet, a cap having an opening that faces the opening of the case and an outlet, and a filter element provided between the opening of the case and the opening of the cap.
- the inlet of the case is connected to an inlet duct that is separately provided from the case.
- Japanese Laid-Open Patent Publication No. 2005-344555 describes an air cleaner that includes a cap provided integrally with an inlet duct. When the cap is attached to a case, the opening of the inlet duct on its downstream side and the opening of an inlet of the case communicate with each other.
- an inlet of a case is connected to an inlet duct separately provided from the case, so that a step is likely to be formed on the inner peripheral surface of the connected portion. This step may cause turbulence of airflow, resulting in an increase in pressure loss.
- an air cleaner for an internal combustion engine includes a case including a case body with an opening, and an inlet duct formed integrally with the case body, a cap including an outlet, and an opening facing the opening of the case body, and a filter element provided between the opening of the case body and the opening of the cap.
- the case includes a first case molding and a second case molding.
- the first case molding includes an opening-side circumferential wall portion surrounding the opening of the case body, and a first inlet duct half in a semi-cylindrical shape extending continuously with the opening-side circumferential wall portion.
- the second case molding includes a bottom wall of the case body, a bottom-wall-side circumferential wall portion formed continuously with the bottom wall, and a second inlet duct half in a semi-cylindrical shape extending continuously with the bottom-wall-side circumferential wall portion.
- the circumference of the opening-side circumferential wall portion and the circumference of the bottom-wall-side circumferential wall portion are joined to each other to form the case body.
- the circumference of the first inlet duct half and the circumference of the second inlet duct half are joined to each other to form the inlet duct.
- the inlet duct is formed integrally with the case body.
- no step is formed on the inner peripheral surface of the air intake passage due to the connection of the inlet duct and the inlet.
- the turbulence of airflow through the air intake passage is reduced.
- the inlet duct is integrated with the case body, so that the cap can be opened and closed by lifting only the cap.
- the ease of replacement of the filter element does not deteriorate.
- the case is formed by joining the first case molding, which includes the opening-side circumferential wall portion and the first inlet duct half, and the second case molding, which includes the bottom wall, the bottom-wall-side circumferential wall portion, and the second inlet duct half, to each other.
- first case molding which includes the opening-side circumferential wall portion and the first inlet duct half
- second case molding which includes the bottom wall, the bottom-wall-side circumferential wall portion, and the second inlet duct half
- the turbulence of airflow flowing through the air intake passage is reduced.
- the air cleaner 10 is installed in the engine compartment of an automobile.
- the front side and the rear side in the longitudinal direction of a vehicle are simply referred to as the front side and the rear side, respectively.
- the right side and the left side as viewed forward from behind the vehicle are simply referred to as the right side and the left side.
- the air cleaner 10 includes a case 20 formed integrally with an inlet duct 26, a cap 50 having an outlet 56, and a filter element 80.
- the filter element 80 is provided between an opening 22 that is formed in a rectangular shape in an upper portion of the case 20 and an opening 52 that faces the opening 22 and is formed in a rectangular shape in a lower portion of the cap 50.
- the case 20 includes a case body 21 in a flat shape having a circumferential wall 23 surrounding the opening 22 and a bottom wall 24, an inlet duct 26 connected to the circumferential wall 23, and a resonator 48 connected to an intermediate portion of the inlet duct 26.
- a flange 25 is formed over the entire circumference opening 22.
- the left edge of the circumferential wall 23 is provided with a case passage 40 constituting a part of the return passage for returning blow-by gas from the internal combustion engine to the air intake passage.
- the case body 21 is provided at its corners with respective four hooking portions 49, to each of which a clamp 95 (refer to Figs. 1 and 2 ) for fastening the case 20 and the cap 50 to each other is hooked.
- the inlet duct 26 includes a connection portion 261 and a bulging portion 262.
- the connection portion 261 is connected to the front face of the circumferential wall 23 of the case body 21, and extends along the circumferential direction of the case body 21.
- the bulging portion 262 bulges from the connection portion 261 toward the front side.
- the connection portion 261 is formed over the entire width of the front face of the circumferential wall 23.
- the inlet duct 26 includes a first extension 27, a reversing portion 29, and a second extension 28.
- the first extension 27 extends from the bulging portion 262 toward the left side along the vehicle lateral direction.
- the reversing portion 29 is reversed from the first extension 27 toward the front side.
- the second extension 28 extends from the reversing portion 29 toward the right side along the vehicle lateral direction.
- the inlet duct 26 of the present embodiment is formed such that the cross-sectional area of the flow channel of air gradually increases from the first extension 27 toward the connection portion 261.
- the resonator 48 is connected to the front face of the bulging portion 262 of the inlet duct 26, and extends toward the right side to be positioned on the right side of the case body 21.
- the resonator 48 has an end projecting toward the rear side.
- the case passage 40 is formed from the rear edge of the first extension 27 of the inlet duct 26 to the left edge of the circumferential wall 23 of the case body 21.
- the case passage 40 includes an upstream-side vertical hole portion 41 extending vertically, a lateral hole portion 43, and a downstream-side vertical hole portion 44.
- the lateral hole portion 43 bends at an upper end of the upstream-side vertical hole portion 41, and extends along the rear edge of the first extension 27 and the left edge of the circumferential wall 23.
- the downstream-side vertical hole portion 44 bends at the downstream end, or the rear end of the lateral hole portion 43 and extends upward.
- an upstream end 42 of the upstream-side vertical hole portion 41 is formed in a cylindrical shape and projects downward.
- a hose in the shape of a straight tube (not illustrated) is fitted onto the upstream end 42.
- the hose is connected to the cylinder head cover (not illustrated) positioned immediately below.
- a downstream end 45 of the downstream-side vertical hole portion 44 is formed in a cylindrical shape and projects upward.
- a hose 90 in the shape of a straight tube is fitted onto the downstream end 45.
- the hose 90 is fixed to the downstream end 45 with a clip 91.
- the case 20 is formed by separate components, which are a first case molding 30 and a second case molding 35 provided below the first case molding 30.
- the first case molding 30 includes an opening-side circumferential wall portion 31 surrounding the opening 22, a first inlet duct half 32 in a semi-cylindrical shape extending continuously with the opening-side circumferential wall portion 31, and a first resonator half 34 in a semi-cylindrical shape extending continuously with the first inlet duct half 32.
- the opening-side circumferential wall portion 31 is provided in its left edge with a first case passage forming portion 33.
- the first case molding 30 is formed as a single piece and made of hard plastic.
- the second case molding 35 includes a bottom wall 24, a bottom-wall-side circumferential wall portion 36 formed continuously with the bottom wall 24, a second inlet duct half 37 in a semi-cylindrical shape extending continuously with the bottom-wall-side circumferential wall portion 36, and a second resonator half 39 in a semi-cylindrical shape extending continuously with the second inlet duct half 37.
- the bottom-wall-side circumferential wall portion 36 is provided in its left edge with a second case passage forming portion 38.
- the second case molding 35 is formed as a single piece and made of hard plastic.
- the circumference of the first case molding 30 and the circumference of the second case molding 35 are joined to each other by vibration welding to form the case 20.
- the circumference of the opening-side circumferential wall portion 31 and the circumference of the bottom-wall-side circumferential wall portion 36 are joined to each other to form the case body 21.
- the circumference of the first inlet duct half 32 and the circumference of the second inlet duct half 37 are joined to each other to form the inlet duct 26.
- the circumference of the first resonator half 34 and the circumference of the second resonator half 39 are joined to each other to form the resonator 48 of a Helmholtz type.
- first case passage forming portion 33 and the circumference of the second case passage forming portion 38 are joined to each other to form the case passage 40.
- the cap 50 includes a cap body 51 in a flat shape having a circumferential wall 53 surrounding the opening 52 and a top wall 54, and an outlet 56 formed integrally with the cap body 51.
- a flange 55 is formed over the entire circumference of the opening 52.
- the left edge of the circumferential wall 53 is provided with a cap passage 70 constituting a portion downstream of the case passage 40 in the return passage.
- the cap body 51 is provided at its corners with respective four support portions 79 each of which supports the clamp 95 (refer to Figs. 1 and 2 ) such that the clamp 95 can be tilted.
- the outlet 56 is connected to the rear face of the circumferential wall 53 of the cap body 51 and projects rearward.
- the outlet 56 has a downstream end facing downward.
- the cap passage 70 is formed from the left edge of the cap body 51 to the left edge of the outlet 56.
- the cap passage 70 includes a vertical hole portion 71 that extends vertically, and a lateral hole portion 73 that bends at the upper end of the vertical hole portion 71 and extends rearward, and then bends and extends rightward.
- the lateral hole portion 73 has a downstream end 74 connected to the outlet 56.
- an upstream end 72 of the vertical hole portion 71 is formed in a cylindrical shape and projects downward.
- the downstream end 45 of the case passage 40 and the upstream end 72 of the cap passage 70 are positioned on the same axis.
- the hose 90 is fitted onto the upstream end 72 of the cap passage 70.
- the cap 50 is formed by separate components, which are a first cap molding 60 and a second cap molding 65 provided above the first cap molding 60.
- the first cap molding 60 includes an opening-side circumferential wall portion 61 surrounding the opening 52, and a first outlet molding portion 63 extending rearward continuously with the opening-side circumferential wall portion 61.
- a first cap passage forming portion 62 is formed in the left edge of each of the opening-side circumferential wall portion 61 and the first outlet molding portion 63.
- the first cap molding 60 is provided with an outer peripheral wall 57 with which the cap body 51 is covered from its outer periphery.
- the outer peripheral wall 57 is provided with the support portion 79.
- the outer peripheral wall 57 is provided with a cutout portion 58 for exposing the upstream end 72 of the cap passage 70 to the outside.
- the first cap molding 60 is formed as a single piece and made of hard plastic.
- the second cap molding 65 includes the top wall 54 of the cap body 51, a top-wall-side circumferential wall portion 66 formed continuously with the top wall 54, and a second outlet molding portion 68 extending rearward continuously with the top-wall-side circumferential wall portion 66.
- the top-wall-side circumferential wall portion 66 is provided in its left edge with a second cap passage forming portion 67.
- the second cap molding 65 is formed as a single piece and made of hard plastic.
- the circumference of the first cap molding 60 and the circumference of the second cap molding 65 are joined to each other by vibration welding to form the cap 50.
- the circumference of the opening-side circumferential wall portion 61 and the circumference of the top-wall-side circumferential wall portion 66 are joined to each other to form the cap body 51.
- the circumference of the first outlet molding portion 63 and the circumference of the second outlet molding portion 68 are joined to each other to form the outlet 56.
- first cap passage forming portion 62 and the circumference of the second cap passage forming portion 67 are joined to each other to form the cap passage 70.
- the filter element 80 includes a filter portion 81 formed by folding a filter medium sheet such as nonwoven fabric and filter paper so as to form pleats, and an annular sealing portion 82 formed around the circumference of the filter portion 81.
- the sealing portion 82 is formed of an elastic member such as polyurethane with closed cells.
- the sealing portion 82 is held by the flange 25 of the case 20 and the flange 55 of the cap 50 to seal against the flange 55 of the cap 50.
- the hose 90 is fitted onto the upstream end 72 of the cap passage 70. This allows the case passage 40 and the cap passage 70 to communicate with each other.
- the first cap passage forming portion 62 and the second cap passage forming portion 67 are joined to each other to form the cap passage 70.
- the cap 50 can be easily formed.
- the inlet duct 26 and the resonator 48 also can be separately formed.
- the resonator may be connected to the inlet duct.
- the inlet duct 26 is not limited to that including the reversing portion 29, the shape of the inlet duct 26 may be changed as necessary.
- the first cap molding 60 and the second cap molding 65 are joined to each other to form the cap 50 in the above embodiment.
- the cap may be integrally molded.
- the first case molding 30 and the second case molding 35 are joined to each other by vibration welding in the above embodiment. However, the first case molding 30 and the second case molding 35 are joined to each other with an adhesive.
- An air cleaner for an internal combustion engine includes a case (20) including a case body (21) with an opening (22), and an inlet duct (26) formed integrally with the case body (21).
- the case (20) includes a first case molding (30) and a second case molding (35).
- the first case molding (30) includes an opening-side circumferential wall portion (31) surrounding the opening (22) of the case body (21), and a first inlet duct half (32) in a semi-cylindrical shape extending continuously with the opening-side circumferential wall portion (31).
- the second case molding (35) includes a bottom wall (24) of the case body (21), a bottom-wall-side circumferential wall portion (36) formed continuously with the bottom wall (24), and a second inlet duct half (37) in a semi-cylindrical shape extending continuously with the bottom-wall-side circumferential wall portion (36).
- the circumference of the opening-side circumferential wall portion (31) and the circumference of the bottom-wall-side circumferential wall portion (36) are joined to each other to form the case body (21).
- the circumference of the first inlet duct half (32) and the circumference of the second inlet duct half (37) are joined to each other to form the inlet duct (26).
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Description
- The present invention relates to an air cleaner for an internal combustion engine.
- In the air intake passage of an internal combustion engine, an air cleaner for filtering intake air is provided.
- A conventional typical air cleaner includes a case having an opening and an inlet, a cap having an opening that faces the opening of the case and an outlet, and a filter element provided between the opening of the case and the opening of the cap. The inlet of the case is connected to an inlet duct that is separately provided from the case.
- Japanese Laid-Open Patent Publication No.
2005-344555 - In a conventional typical air cleaner, an inlet of a case is connected to an inlet duct separately provided from the case, so that a step is likely to be formed on the inner peripheral surface of the connected portion. This step may cause turbulence of airflow, resulting in an increase in pressure loss.
- In the air cleaner described in Japanese Laid-Open Patent Publication No.
2005-344555 - Another air cleaner is described in
EP 2 072 796 A1 . - It is an objective of the present invention, according to the claims, to provide an air cleaner for an internal combustion engine, capable of reducing turbulence of airflow.
- To achieve the foregoing objective, an air cleaner for an internal combustion engine is provided that includes a case including a case body with an opening, and an inlet duct formed integrally with the case body, a cap including an outlet, and an opening facing the opening of the case body, and a filter element provided between the opening of the case body and the opening of the cap. The case includes a first case molding and a second case molding. The first case molding includes an opening-side circumferential wall portion surrounding the opening of the case body, and a first inlet duct half in a semi-cylindrical shape extending continuously with the opening-side circumferential wall portion. The second case molding includes a bottom wall of the case body, a bottom-wall-side circumferential wall portion formed continuously with the bottom wall, and a second inlet duct half in a semi-cylindrical shape extending continuously with the bottom-wall-side circumferential wall portion. The circumference of the opening-side circumferential wall portion and the circumference of the bottom-wall-side circumferential wall portion are joined to each other to form the case body. The circumference of the first inlet duct half and the circumference of the second inlet duct half are joined to each other to form the inlet duct.
- With the above-described configuration, the inlet duct is formed integrally with the case body. Thus, unlike a conventional structure in which an inlet duct separately provided from a case is connected to an inlet of the case, no step is formed on the inner peripheral surface of the air intake passage due to the connection of the inlet duct and the inlet. Thus, the turbulence of airflow through the air intake passage is reduced.
- In addition, the inlet duct is integrated with the case body, so that the cap can be opened and closed by lifting only the cap. Thus, the ease of replacement of the filter element does not deteriorate.
- When an inlet duct is integrated with a case body, molding of a case becomes difficult if the inlet duct has a complex shape that is difficult to remove from the mold.
- In this respect, with the above-described configuration, the case is formed by joining the first case molding, which includes the opening-side circumferential wall portion and the first inlet duct half, and the second case molding, which includes the bottom wall, the bottom-wall-side circumferential wall portion, and the second inlet duct half, to each other. This enables each of the case moldings to be easily molded, so that the case is formed easily.
- With the present invention, the turbulence of airflow flowing through the air intake passage is reduced.
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Fig. 1 is a perspective view illustrating the whole of an air cleaner for an internal combustion engine of an embodiment. -
Fig. 2 is an exploded perspective view illustrating each of components constituting the air cleaner of the embodiment. -
Fig. 3 is a sectional view taken along line 3-3 ofFig. 1 . -
Fig. 4 is a perspective view illustrating a case of the embodiment as viewed from its front side. -
Fig. 5 is a perspective view illustrating a cap of the embodiment as viewed from its front side. -
Fig. 6 is a perspective view illustrating a first case molding of the embodiment as viewed from its reverse side. -
Fig. 7 is a perspective view illustrating a second case molding of the embodiment as viewed from its front side. -
Fig. 8 is a perspective view illustrating a first cap molding of the embodiment as viewed from its front side. -
Fig. 9 is a perspective view illustrating the first cap molding of the embodiment as viewed from its reverse side. -
Fig. 10 is a perspective view illustrating a second cap molding of the embodiment as viewed from its front side. -
Fig. 11 is a perspective view illustrating the second cap molding of the embodiment as viewed from its reverse side. -
Fig. 12 is an enlarged exploded perspective view illustrating each of components constituting the air cleaner of the embodiment, and a portion corresponding to a case passage and a cap passage in a return passage for blow-by gas. -
Fig. 13 is an enlarged plan view of the air cleaner of the embodiment, illustrating a portion corresponding to the case passage and the cap passage. -
Fig. 14 is a sectional view taken along line 14-14 ofFig. 13 . -
Fig. 15 is a sectional view taken along line 15-15 ofFig. 13 . - An air cleaner for an internal combustion engine (hereinafter, referred to as an air cleaner 10) according to one embodiment will now be described with reference to
Figs. 1 to 15 . Theair cleaner 10 is installed in the engine compartment of an automobile. - Hereinafter, the front side and the rear side in the longitudinal direction of a vehicle are simply referred to as the front side and the rear side, respectively. In addition, the right side and the left side as viewed forward from behind the vehicle are simply referred to as the right side and the left side.
- As illustrated in
Figs. 1 to 3 , theair cleaner 10 includes acase 20 formed integrally with aninlet duct 26, acap 50 having anoutlet 56, and afilter element 80. Thefilter element 80 is provided between anopening 22 that is formed in a rectangular shape in an upper portion of thecase 20 and anopening 52 that faces theopening 22 and is formed in a rectangular shape in a lower portion of thecap 50. - As illustrated in
Figs. 3 and4 , thecase 20 includes acase body 21 in a flat shape having acircumferential wall 23 surrounding the opening 22 and abottom wall 24, aninlet duct 26 connected to thecircumferential wall 23, and aresonator 48 connected to an intermediate portion of theinlet duct 26. - As illustrated in
Fig. 3 , aflange 25 is formed over the entire circumference opening 22. - As illustrated in
Fig. 4 , the left edge of thecircumferential wall 23 is provided with acase passage 40 constituting a part of the return passage for returning blow-by gas from the internal combustion engine to the air intake passage. - The
case body 21 is provided at its corners with respective four hookingportions 49, to each of which a clamp 95 (refer toFigs. 1 and2 ) for fastening thecase 20 and thecap 50 to each other is hooked. - As illustrated in
Figs. 3 and4 , theinlet duct 26 includes aconnection portion 261 and a bulgingportion 262. Theconnection portion 261 is connected to the front face of thecircumferential wall 23 of thecase body 21, and extends along the circumferential direction of thecase body 21. Thebulging portion 262 bulges from theconnection portion 261 toward the front side. Theconnection portion 261 is formed over the entire width of the front face of thecircumferential wall 23. - The
inlet duct 26 includes afirst extension 27, a reversingportion 29, and asecond extension 28. Thefirst extension 27 extends from thebulging portion 262 toward the left side along the vehicle lateral direction. The reversingportion 29 is reversed from thefirst extension 27 toward the front side. Thesecond extension 28 extends from the reversingportion 29 toward the right side along the vehicle lateral direction. - The
inlet duct 26 of the present embodiment is formed such that the cross-sectional area of the flow channel of air gradually increases from thefirst extension 27 toward theconnection portion 261. - The
resonator 48 is connected to the front face of the bulgingportion 262 of theinlet duct 26, and extends toward the right side to be positioned on the right side of thecase body 21. Theresonator 48 has an end projecting toward the rear side. - As illustrated in
Figs. 4 and12 , thecase passage 40 is formed from the rear edge of thefirst extension 27 of theinlet duct 26 to the left edge of thecircumferential wall 23 of thecase body 21. - As illustrated in
Fig. 12 , thecase passage 40 includes an upstream-sidevertical hole portion 41 extending vertically, alateral hole portion 43, and a downstream-sidevertical hole portion 44. Thelateral hole portion 43 bends at an upper end of the upstream-sidevertical hole portion 41, and extends along the rear edge of thefirst extension 27 and the left edge of thecircumferential wall 23. The downstream-sidevertical hole portion 44 bends at the downstream end, or the rear end of thelateral hole portion 43 and extends upward. - As illustrated in
Figs. 4 ,12 , and14 , anupstream end 42 of the upstream-sidevertical hole portion 41 is formed in a cylindrical shape and projects downward. A hose in the shape of a straight tube (not illustrated) is fitted onto theupstream end 42. The hose is connected to the cylinder head cover (not illustrated) positioned immediately below. - As illustrated in
Figs. 4 ,12 , and15 , adownstream end 45 of the downstream-sidevertical hole portion 44 is formed in a cylindrical shape and projects upward. Ahose 90 in the shape of a straight tube is fitted onto thedownstream end 45. Thehose 90 is fixed to thedownstream end 45 with aclip 91. - As illustrated in
Figs. 2 to 4 , thecase 20 is formed by separate components, which are afirst case molding 30 and a second case molding 35 provided below thefirst case molding 30. - As illustrated in
Figs. 2 ,4 , and6 , the first case molding 30 includes an opening-sidecircumferential wall portion 31 surrounding theopening 22, a firstinlet duct half 32 in a semi-cylindrical shape extending continuously with the opening-sidecircumferential wall portion 31, and afirst resonator half 34 in a semi-cylindrical shape extending continuously with the firstinlet duct half 32. The opening-sidecircumferential wall portion 31 is provided in its left edge with a first casepassage forming portion 33. The first case molding 30 is formed as a single piece and made of hard plastic. - As illustrated in
Figs. 2 ,4 , and7 , the second case molding 35 includes abottom wall 24, a bottom-wall-sidecircumferential wall portion 36 formed continuously with thebottom wall 24, a secondinlet duct half 37 in a semi-cylindrical shape extending continuously with the bottom-wall-sidecircumferential wall portion 36, and asecond resonator half 39 in a semi-cylindrical shape extending continuously with the secondinlet duct half 37. The bottom-wall-sidecircumferential wall portion 36 is provided in its left edge with a second casepassage forming portion 38. The second case molding 35 is formed as a single piece and made of hard plastic. - As illustrated in
Figs. 2 and4 , the circumference of thefirst case molding 30 and the circumference of the second case molding 35 are joined to each other by vibration welding to form thecase 20. - That is, the circumference of the opening-side
circumferential wall portion 31 and the circumference of the bottom-wall-sidecircumferential wall portion 36 are joined to each other to form thecase body 21. The circumference of the firstinlet duct half 32 and the circumference of the secondinlet duct half 37 are joined to each other to form theinlet duct 26. The circumference of thefirst resonator half 34 and the circumference of thesecond resonator half 39 are joined to each other to form theresonator 48 of a Helmholtz type. - In addition, the circumference of the first case
passage forming portion 33 and the circumference of the second casepassage forming portion 38 are joined to each other to form thecase passage 40. - As illustrated in
Figs. 3 and5 , thecap 50 includes acap body 51 in a flat shape having acircumferential wall 53 surrounding theopening 52 and atop wall 54, and anoutlet 56 formed integrally with thecap body 51. - As illustrated in
Fig. 3 , aflange 55 is formed over the entire circumference of theopening 52. - As illustrated in
Fig. 5 , the left edge of thecircumferential wall 53 is provided with acap passage 70 constituting a portion downstream of thecase passage 40 in the return passage. - The
cap body 51 is provided at its corners with respective foursupport portions 79 each of which supports the clamp 95 (refer toFigs. 1 and2 ) such that theclamp 95 can be tilted. - As illustrated in
Figs. 3 and5 , theoutlet 56 is connected to the rear face of thecircumferential wall 53 of thecap body 51 and projects rearward. Theoutlet 56 has a downstream end facing downward. - As illustrated in
Figs. 5 and12 , thecap passage 70 is formed from the left edge of thecap body 51 to the left edge of theoutlet 56. - As illustrated in
Figs. 12 and15 , thecap passage 70 includes avertical hole portion 71 that extends vertically, and alateral hole portion 73 that bends at the upper end of thevertical hole portion 71 and extends rearward, and then bends and extends rightward. Thelateral hole portion 73 has adownstream end 74 connected to theoutlet 56. - As illustrated in
Figs. 12 and15 , anupstream end 72 of thevertical hole portion 71 is formed in a cylindrical shape and projects downward. - As illustrated in
Figs. 12 and15 , thedownstream end 45 of thecase passage 40 and theupstream end 72 of thecap passage 70 are positioned on the same axis. Thehose 90 is fitted onto theupstream end 72 of thecap passage 70. - As illustrated in
Figs. 2 , and6 to 8 , thecap 50 is formed by separate components, which are afirst cap molding 60 and asecond cap molding 65 provided above thefirst cap molding 60. - As illustrated in
Figs. 2 ,8, and. 9 , thefirst cap molding 60 includes an opening-sidecircumferential wall portion 61 surrounding theopening 52, and a firstoutlet molding portion 63 extending rearward continuously with the opening-sidecircumferential wall portion 61. In addition, a first cappassage forming portion 62 is formed in the left edge of each of the opening-sidecircumferential wall portion 61 and the firstoutlet molding portion 63. - The
first cap molding 60 is provided with an outerperipheral wall 57 with which thecap body 51 is covered from its outer periphery. The outerperipheral wall 57 is provided with thesupport portion 79. The outerperipheral wall 57 is provided with acutout portion 58 for exposing theupstream end 72 of thecap passage 70 to the outside. Thefirst cap molding 60 is formed as a single piece and made of hard plastic. - As illustrated in
Figs. 2 ,10, and 11 , thesecond cap molding 65 includes thetop wall 54 of thecap body 51, a top-wall-sidecircumferential wall portion 66 formed continuously with thetop wall 54, and a secondoutlet molding portion 68 extending rearward continuously with the top-wall-sidecircumferential wall portion 66. The top-wall-sidecircumferential wall portion 66 is provided in its left edge with a second cappassage forming portion 67. Thesecond cap molding 65 is formed as a single piece and made of hard plastic. - As illustrated in
Figs. 2 and5 , the circumference of thefirst cap molding 60 and the circumference of thesecond cap molding 65 are joined to each other by vibration welding to form thecap 50. - That is, the circumference of the opening-side
circumferential wall portion 61 and the circumference of the top-wall-sidecircumferential wall portion 66 are joined to each other to form thecap body 51. The circumference of the firstoutlet molding portion 63 and the circumference of the secondoutlet molding portion 68 are joined to each other to form theoutlet 56. - In addition, the circumference of the first cap
passage forming portion 62 and the circumference of the second cappassage forming portion 67 are joined to each other to form thecap passage 70. - As illustrated in
Figs. 2 and3 , thefilter element 80 includes afilter portion 81 formed by folding a filter medium sheet such as nonwoven fabric and filter paper so as to form pleats, and anannular sealing portion 82 formed around the circumference of thefilter portion 81. The sealingportion 82 is formed of an elastic member such as polyurethane with closed cells. - As illustrated in
Fig. 3 , the sealingportion 82 is held by theflange 25 of thecase 20 and theflange 55 of thecap 50 to seal against theflange 55 of thecap 50. - In the
air cleaner 10 described above, when thecap 50 is attached to thecase 20, thehose 90 is fitted onto theupstream end 72 of thecap passage 70. This allows thecase passage 40 and thecap passage 70 to communicate with each other. - The above-described air cleaner for an internal combustion engine achieves the following advantages.
- (1) The
case 20 of theair cleaner 10 of the internal combustion engine includes the first case molding 30 having the opening-sidecircumferential wall portion 31 surrounding theopening 22 of thecase body 21, and the firstinlet duct half 32 in a semi-cylindrical shape extending continuously with the opening-sidecircumferential wall portion 31. Thecase 20 also includes the second case molding 35 having thebottom wall 24 of thecase body 21, the bottom-wall-sidecircumferential wall portion 36 formed continuously with thebottom wall 24, and the secondinlet duct half 37 in a semi-cylindrical shape extending continuously with the bottom-wall-sidecircumferential wall portion 36. The circumference of the opening-sidecircumferential wall portion 31 and the circumference of the bottom-wall-sidecircumferential wall portion 36 are joined to each other to form thecase body 21. The circumference of the firstinlet duct half 32 and the circumference of the secondinlet duct half 37 are joined to each other to form theinlet duct 26.
With the above-described configuration, theinlet duct 26 is formed integrally with thecase body 21, so that no step is formed on the inner peripheral surface of the air intake passage due to connection of the inlet duct and the inlet, unlike a conventional structure in which an inlet duct separately provided from a case is connected to an inlet of the case. Thus, the turbulence of airflow is reduced.
In addition, theinlet duct 26 is integrated with thecase body 21, so that the cap can be opened and closed by lifting only thecap 50. Thus, the ease of replacement of thefilter element 80 does not deteriorate.
When theinlet duct 26 is integrated with thecase body 21, molding of thecase 20 becomes difficult if theinlet duct 26 has a complex shape that is difficult to remove from the mold.
In this respect, with the above-described configuration, thecase 20 is formed by joining the first case molding 30 including the opening-sidecircumferential wall portion 31 and the firstinlet duct half 32, and the second case molding 35 including thebottom wall 24, the bottom-wall-sidecircumferential wall portion 36, and the secondinlet duct half 37, to each other. This enables each of the case moldings 30 and 35 to be easily molded to easily form thecase 20.
Thus, the ease of replacement and moldability of thefilter element 80 are excellent, and turbulence of airflow is reduced. - (2) The
inlet duct 26 includes the reversingportion 29.
In general, when theinlet duct 26 includes the reversingportion 29, removal from the mold along the extension direction of the reversingportion 29 may be difficult.
In this respect, with the above-described configuration, theinlet duct 26 is formed by separate components, which are the firstinlet duct half 32 and the secondinlet duct half 37. Thus, thecase 20 formed integrally with theinlet duct 26 can be easily formed. - (3) The
inlet duct 26 includes theconnection portion 261, which is connected to the front face of thecircumferential wall 23 of thecase body 21 and extends along the circumferential direction of thecase body 21, the bulgingportion 262 bulging from theconnection portion 261 toward the front side, and thefirst extension 27, which is connected to one end of the bulgingportion 262 in its circumferential direction and extends along the circumferential direction. A cross-sectional area of a flow channel of air gradually increases from thefirst extension 27 toward theconnection portion 261.
With the above-described configuration, air is introduced into thecase body 21 through thefirst extension 27, the bulgingportion 262, and theconnection portion 261, of theinlet duct 26. At this time, the cross-sectional area of the flow channel of air gradually increases from thefirst extension 27 toward theconnection portion 261, so that a sudden decrease in pressure of air is prevented to reduce turbulence of airflow. - (4) The first case molding 30 is provided with the
first resonator half 34 in a semi-cylindrical shape. The second case molding 35 is provided with thesecond resonator half 39 in a semi-cylindrical shape. The circumference of thefirst resonator half 34 and the circumference of thesecond resonator half 39 are joined to each other to form theresonator 48 of a Helmholtz type.
With the above-described configuration, theinlet duct 26 is formed integrally with theresonator 48, so that a separate process of attaching theresonator 48 to theinlet duct 26 is unnecessary. - (5) The
case 20 is provided with thecase passage 40, which constitutes a part of the return passage for returning blow-by gas from the internal combustion engine to the air intake passage. Thecap 50 is provided with thecap passage 70, which constitutes a portion downstream of thecase passage 40 in the return passage. Thecase passage 40 and thecap passage 70 are configured to communicate with each other when thecase 20 and thecap 50 are attached to each other.
With the above-described configuration, when thecase 20 and thecap 50 of theair cleaner 10 are attached to each other, thecase passage 40 and thecap passage 70, each of which constitutes a part of the return passage for returning blow-by gas from the internal combustion engine to the air intake passage, communicate with each other.
This enables reduction in length of a hose constituting a part of the return passage of blow-by gas, so that a hose in a specific shape is unnecessary. Thus, the structure of the periphery of theair cleaner 10 can be simplified. - (6) The
case passage 40 is formed in the edge of thecase body 21. Thecap passage 70 is formed in the edge of thecap body 51.
With the above-described configuration, it is possible to properly avoid influence on the internal space of thecase body 21, or the shape of the air intake passage due to providing of thecase passage 40 in thecase 20. In addition, it is possible to properly avoid influence on the internal space of thecap body 51, or the shape of the air intake passage due to providing of thecap passage 70 in thecap 50. - (7) The
downstream end 45 of thecase passage 40 and theupstream end 72 of thecap passage 70 are positioned on the same axis.
With the above-described configuration, when theopening 22 of thecase 20 of theair cleaner 10 and theopening 52 of thecap 50 are attached to each other while facing each other, thecase passage 40 and thecap passage 70 can easily communicate with each other. Thus, it is possible to facilitate the attachment work of thecase 20 and thecap 50. - (8) The
hose 90 in the shape of a straight tube is provided between thedownstream end 45 of thecase passage 40 and theupstream end 72 of thecap passage 70.
With the above-described configuration, thedownstream end 45 of thecase passage 40 and theupstream end 72 of thecap passage 70 communicate with each other through thehose 90 therebetween.
Thehose 90 in the shape of a straight tube also serves as a guide when thecap 50 is attached to thecase 20, so that it is possible to facilitate the attachment work of thecase 20 and thecap 50. - (9) The
hose 90 is fixed to thedownstream end 45 of thecase passage 40.
When thecap 50 is removed from thecase 20, thehose 90 may be detached from thecase 20. In this case, when thecap 50 is attached to thecase 20, thehose 90 needs to be attached to thedownstream end 45 of thecase passage 40 again, thereby complicating the attachment work.
In this respect, with the above-described configuration, thehose 90 is fixed to thedownstream end 45 of thecase passage 40, so that thehose 90 is not detached from thecase 20 when thecap 50 is removed from thecase 20. This eliminates the necessity for attaching thehose 90 to thedownstream end 45 of thecase passage 40 again when thecap 50 is attached to thecase 20, so that it is possible to facilitate the attachment work of thecap 50 to thecase 20. - (10) The
cap 50 includes the outerperipheral wall 57, with which thecap body 51 is covered from its outer periphery. The outerperipheral wall 57 is provided with thecutout portion 58 for exposing theupstream end 72 of thecap passage 70 to the outside.
It is conceivable that thesupport portion 79 of theclamp 95 for fastening thecase 20 and thecap 50 to each other is formed in the outerperipheral wall 57, with which thecap body 51 is covered from its outer periphery.
In this case, however, theupstream end 72 of thecap passage 70 is covered with the outerperipheral wall 57 from its outer periphery. Thus, it is difficult for an operator to visually check whether theupstream end 72 of thecap passage 70 is inserted into a predetermined position with respect to thehose 90 fixed to thedownstream end 45 of thecase passage 40.
In this respect, with the above-described configuration, theupstream end 72 of thecap passage 70 is exposed to the outside through thecutout portion 58, so that an operator can visually check that theupstream end 72 of thecap passage 70 is inserted into the predetermined position with respect to thehose 90. - (11) The
downstream end 74 of thecap passage 70 is connected to theoutlet 56.
When thedownstream end 74 of thecap passage 70 is connected to thecap body 51, blow-by gas is returned into thecap body 51. Thus, when thecap body 51 is in a flat shape like the present embodiment, oil mist contained in blow-by gas is likely to collect on thefilter portion 81 of thefilter element 80, whereby the filter performance of thefilter portion 81 may deteriorate.
In this respect, with the above-described configuration, thedownstream end 74 of thecap passage 70 is connected to theoutlet 56. This causes blow-by gas to flow toward a downstream side of theoutlet 56, so that attachment of oil mist to thefilter portion 81 of thefilter element 80 is properly avoided. - (12) The
case passage 40 includes the upstream-sidevertical hole portion 41 extending upward from itsupstream end 42, and thelateral hole portion 43, which bends at the upper end of the upstream-sidevertical hole portion 41 and extends.
With the above-described configuration, as represented by the arrow of a broken line inFig. 14 , when passing through the bent portion between the upstream-sidevertical hole portion 41 and thelateral hole portion 43 of thecase passage 40, blow-by gas collides with aceiling face 46 of the bent portion to facilitate separation of oil mist contained in the blow-by gas. Thus, it is possible to limit oil mist contained in blow-by gas, flowing into the air intake passage. - (13) The
cap passage 70 includes thevertical hole portion 71 extending upward from itsupstream end 72, and thelateral hole portion 73, which bends and extends from the upper end of thevertical hole portion 71.
With the above-described configuration, as represented by the arrow of a broken line inFig. 15 , when passing through the bent portion between thevertical hole portion 71 and thelateral hole portion 73 of thecap passage 70, blow-by gas collides with aceiling face 75 of the bent portion to facilitate separation of oil mist contained in the blow-by gas. Thus, it is possible to reduce oil mist contained in blow-by gas, flowing into the air intake passage. - (14) The
case 20 includes the first case molding 30 having the opening-sidecircumferential wall portion 31 and the first casepassage forming portion 33, and the second case molding 35 having thebottom wall 24, the bottom-wall-sidecircumferential wall portion 36, and the second casepassage forming portion 38. The circumference of the opening-sidecircumferential wall portion 31 and the circumference of the bottom-wall-sidecircumferential wall portion 36 are joined to each other to form thecase body 21.
The first casepassage forming portion 33 and the second casepassage forming portion 38 are joined to each other to form thecase passage 40.
With the above-described configuration, the first casepassage forming portion 33 and the second casepassage forming portion 38 are joined to each other to form thecase passage 40. Thus, even when removal from the mold is difficult due to the complicated shape of thecase passage 40, thecase 20 can be easily formed. - (15) The
cap 50 includes thefirst cap molding 60, which has the opening-sidecircumferential wall portion 61 and the first cappassage forming portion 62, and thesecond cap molding 65, which has thetop wall 54, the top-wall-sidecircumferential wall portion 66, and the second cappassage forming portion 67. The circumference of the opening-sidecircumferential wall portion 61 and the circumference of the top-wall-sidecircumferential wall portion 66 are joined to each other to form thecap body 51. The first cappassage forming portion 62 and the second cappassage forming portion 67 are joined to each other to form thecap passage 70. - With the above-described configuration, the first cap
passage forming portion 62 and the second cappassage forming portion 67 are joined to each other to form thecap passage 70. Thus, even when removal from the mold is difficult due to the complicated shape of thecap passage 70, thecap 50 can be easily formed. - The above-described embodiment may be modified as follows.
- The
inlet duct 26 and theresonator 48 also can be separately formed. In this case, the resonator may be connected to the inlet duct. - The
inlet duct 26 is not limited to that including the reversingportion 29, the shape of theinlet duct 26 may be changed as necessary. - The
first cap molding 60 and thesecond cap molding 65 are joined to each other to form thecap 50 in the above embodiment. However, the cap may be integrally molded. - The
first case molding 30 and the second case molding 35 are joined to each other by vibration welding in the above embodiment. However, thefirst case molding 30 and the second case molding 35 are joined to each other with an adhesive. - An air cleaner for an internal combustion engine includes a case (20) including a case body (21) with an opening (22), and an inlet duct (26) formed integrally with the case body (21). The case (20) includes a first case molding (30) and a second case molding (35). The first case molding (30) includes an opening-side circumferential wall portion (31) surrounding the opening (22) of the case body (21), and a first inlet duct half (32) in a semi-cylindrical shape extending continuously with the opening-side circumferential wall portion (31). The second case molding (35) includes a bottom wall (24) of the case body (21), a bottom-wall-side circumferential wall portion (36) formed continuously with the bottom wall (24), and a second inlet duct half (37) in a semi-cylindrical shape extending continuously with the bottom-wall-side circumferential wall portion (36). The circumference of the opening-side circumferential wall portion (31) and the circumference of the bottom-wall-side circumferential wall portion (36) are joined to each other to form the case body (21). The circumference of the first inlet duct half (32) and the circumference of the second inlet duct half (37) are joined to each other to form the inlet duct (26).
Claims (3)
- An air cleaner for an internal combustion engine, comprising:a case (20) including a case body (21) with an opening (22), and an inlet duct (26) formed integrally with the case body (21) leading to the opening (22);a cap (50) including an outlet (56), and an opening (52) facing the opening (22) of the case body (21) and leading air to the outlet (56), anda filter element (80) provided between the opening (22) of the case body (21) and the opening (52) of the cap (50), whereinthe case (20) includes a first case molding (30) and a second case molding (35),the first case molding (30) includesan opening-side circumferential wall portion (31) surrounding the opening (22) of the case body (21), anda first inlet duct half (32) in a semi-cylindrical shape,the second case molding (35) includesa bottom wall (24) of the case body (21),a bottom-wall-side circumferential wall portion (36) formed continuously with the bottom wall (24), anda second inlet duct half (37) in a semi-cylindrical shape extending continuously with the bottom-wall-side circumferential wall portion (36),the circumference of the opening-side circumferential wall portion (31) and the circumference of the bottom-wall-side circumferential wall portion (36) are joined to each other to form the case body (21), andthe circumference of the fist inlet duct half (32) and the circumference of the second inlet duct half (37) are joined to each other to form the inlet duct (26),the first case molding (30) is formed as a single piece,the second case molding (35) is formed as a single piece,the first inlet duct half (32) extends continuously with the opening-side circumferential wall portion (31), such that the inlet duct (26) includesa connection portion (261), which extends along a circumferential direction of the opening (22) of the case body (21)characterized in thatthe connection portion (261) is formed over the entire width of one face of said opening-side circumferential wall portion (31) of the case body (21),the first case molding (30) is provided with a first resonator half (34) in a semi-cylindrical shape,the second case molding (35) is provided with a second resonator half (39) in a semi-cylindrical shape, andthe circumference of the first resonator half (34) and the circumference of the second resonator half (39) are joined to each other to form a resonator (48) of a Helmholtz type.
- The air cleaner for an internal combustion engine, according to claim 1, wherein the inlet duct (26) includes a reversing portion (29) for reversing a flow channel of air.
- The air cleaner for an internal combustion engine, according to claim 1 or 2, wherein
the inlet duct (26) includesa bulging portion (262) bulging from the connection portion (261) toward an outer periphery, andan extension (27), which is connected to one end of the bulging portion (262) in the circumferential direction and extends along the circumferential direction, anda cross-section area of the flow channel of air gradually increases from the extension (27) toward the connection portion (261).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL17206908T PL3339623T3 (en) | 2016-12-26 | 2017-12-13 | Air cleaner for internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016251933A JP6790809B2 (en) | 2016-12-26 | 2016-12-26 | Internal combustion engine air cleaner |
Publications (2)
Publication Number | Publication Date |
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EP3339623A1 EP3339623A1 (en) | 2018-06-27 |
EP3339623B1 true EP3339623B1 (en) | 2019-10-23 |
Family
ID=60673491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17206908.0A Active EP3339623B1 (en) | 2016-12-26 | 2017-12-13 | Air cleaner for internal combustion engine |
Country Status (3)
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EP (1) | EP3339623B1 (en) |
JP (1) | JP6790809B2 (en) |
PL (1) | PL3339623T3 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2019085906A (en) * | 2017-11-06 | 2019-06-06 | トヨタ紡織株式会社 | Air cleaner |
JP7278203B2 (en) * | 2019-12-02 | 2023-05-19 | マーレジャパン株式会社 | air cleaner |
JP7404882B2 (en) | 2020-01-15 | 2023-12-26 | トヨタ自動車株式会社 | Advertisement presentation system and advertisement presentation method |
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US20070175187A1 (en) * | 2006-01-31 | 2007-08-02 | Mann & Hummel Gmbh | Filter element and filter system for the intake air of an internal combustion engine |
US20070251392A1 (en) * | 2004-09-21 | 2007-11-01 | Mann & Hummel Gmbh | Filter element |
WO2013117988A1 (en) * | 2012-02-08 | 2013-08-15 | Ufi Filters S.P.A. | A filter cartridge |
US20150075126A1 (en) * | 2013-09-19 | 2015-03-19 | Mann+Hummel Gmbh | Air Filter Device, Especially for a Motor Vehicle |
US20150267655A1 (en) * | 2012-12-06 | 2015-09-24 | Mann+Hummel Gmbh | Intake Module of an Air Intake Tract of an Internal Combustion Engine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4254349B2 (en) * | 2003-05-28 | 2009-04-15 | スズキ株式会社 | Intake device for internal combustion engine |
JP4209799B2 (en) * | 2004-03-31 | 2009-01-14 | スズキ株式会社 | Engine intake structure |
JP4480472B2 (en) | 2004-06-01 | 2010-06-16 | ダイハツ工業株式会社 | Intake device for internal combustion engine |
JP4578511B2 (en) * | 2007-09-10 | 2010-11-10 | 本田技研工業株式会社 | Air cleaner device for internal combustion engine |
WO2009034808A1 (en) * | 2007-09-10 | 2009-03-19 | Honda Motor Co., Ltd. | Air cleaner device for internal combustion engine and internal combustion engine |
JP5987425B2 (en) * | 2012-04-05 | 2016-09-07 | スズキ株式会社 | Intake device for internal combustion engine |
-
2016
- 2016-12-26 JP JP2016251933A patent/JP6790809B2/en active Active
-
2017
- 2017-12-13 PL PL17206908T patent/PL3339623T3/en unknown
- 2017-12-13 EP EP17206908.0A patent/EP3339623B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US20070251392A1 (en) * | 2004-09-21 | 2007-11-01 | Mann & Hummel Gmbh | Filter element |
US20070175187A1 (en) * | 2006-01-31 | 2007-08-02 | Mann & Hummel Gmbh | Filter element and filter system for the intake air of an internal combustion engine |
WO2013117988A1 (en) * | 2012-02-08 | 2013-08-15 | Ufi Filters S.P.A. | A filter cartridge |
US20150267655A1 (en) * | 2012-12-06 | 2015-09-24 | Mann+Hummel Gmbh | Intake Module of an Air Intake Tract of an Internal Combustion Engine |
US20150075126A1 (en) * | 2013-09-19 | 2015-03-19 | Mann+Hummel Gmbh | Air Filter Device, Especially for a Motor Vehicle |
Also Published As
Publication number | Publication date |
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JP2018105217A (en) | 2018-07-05 |
PL3339623T3 (en) | 2020-04-30 |
EP3339623A1 (en) | 2018-06-27 |
JP6790809B2 (en) | 2020-11-25 |
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