JP2013092076A - Air cleaner device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an element of an air cleaner device from being soiled by oil included in blow-by gas, to prevent film surface vibration of a casing of the air cleaner device, and to prevent oil component of blow-by gas led into a blow-by gas introduction port from freezing.SOLUTION: Attachment of oil to an element 24 can be prevented by connecting the vicinity of a blow-by gas introduction port 22f and the vicinity of the air delivery port 22g are connected by an oil guide member 32 and by guiding oil contained in the blow-by gas to an air delivery port 22g with an oil guide member 32. When the blow-by gas is introduced into the casing 23 through a blow-by gas introduction port 22f at a low temperature, an oil guide member 32 facing the blow-by gas introduction port 22f covers a part connected to a first side surface 22b with bulkheads 22h, 22p, 22q. Low temperature air is blocked by the bulkheads 22h, 22p, 22q to be hardly contacted to the blow-by gas introduction port 22f. As a result, freezing of oil component of blow-by gas can be prevented.

Description

  In the present invention, an element that captures dust contained in air is disposed inside a casing of an air cleaner device, thereby forming a dirty chamber and a clean chamber on the lower side and upper side of the element, respectively, and introducing air into the dirty chamber. The present invention relates to an air cleaner apparatus for a vehicle in which a blow-by gas inlet and an air outlet are provided in the clean chamber.

  Air blower gas from the engine is supplied to an air cleaner device that filters the dust contained in the air supplied to the engine through the element, and fuel vapor and oil mist contained in the blowby gas are combusted by the engine together with the intake air to prevent emission to the atmosphere. To be done. In this case, when oil mist contained in the blow-by gas is formed into droplets inside the air cleaner device and adheres to the element, there is a problem that the element is clogged and the dust filtering performance is deteriorated.

  Therefore, the blowby gas inlet and the air outlet are opened on the wall of the casing facing the element of the air cleaner device so as to be adjacent to each other, and the blowby gas reversing guide extends from the blowby gas inlet to the air outlet. Patent Document 1 listed below discloses a device that prevents blow-by gas from being blown directly onto an element to prevent the element from being soiled by oil.

Japanese Patent No. 3177800

  However, since the conventional blowby gas reversing guide directly covers the air outlet of the casing, the flow of air from the inside of the casing to the air outlet is hindered and pressure loss increases. Since the blow-by gas reversing guide hardly contributes to the improvement of the rigidity of the casing, the casing may vibrate and cause noise.

  Even when the outside air temperature is below freezing, the temperature of the blow-by gas supplied from the engine to the air cleaner device is relatively high, but the blow-by gas is cooled by the outside air that is introduced to the inside of the air cleaner device, and the oil component is reduced. There is a possibility of freezing and blocking the blow-by gas inlet of the air cleaner device. However, since the above-mentioned conventional one does not have means for preventing freezing of the oil content of blow-by gas at a low outside air temperature, it is desirable to take some measures.

  The present invention has been made in view of the above circumstances, and prevents the elements of the air cleaner device from being contaminated with oil contained in the blow-by gas, and also prevents vibration of the casing of the air cleaner device casing, and further introduces the blow-by gas. The purpose is to prevent the oil content of the blow-by gas introduced into the mouth from freezing.

  In order to achieve the above object, according to the invention described in claim 1, by disposing an element for capturing dust contained in air inside a casing of an air cleaner device, the element is disposed below and above the element. Dirty chambers and clean chambers are formed, an air inlet device is provided in the dirty chamber, and a blowby gas inlet port and an air outlet port are provided in the clean chamber. The air outlet is provided on the first and second side surfaces of the casing facing each other, the first side surface in the vicinity of the blow-by gas inlet and the second side surface in the vicinity of the air outlet. Oil guide that guides the oil in which oil mist contained in blow-by gas is agglomerated Connect the timber, the oil guide member vehicular air cleaner assembly, wherein a covering part for connecting to the first side surface in the blocking wall is proposed.

  According to the invention described in claim 2, in addition to the configuration of claim 1, the oil guide member includes a shielding portion that collides with blow-by gas introduced from the blow-by gas introduction port. A vehicle air cleaner apparatus is proposed.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the oil guide member is inserted from the blow-by gas inlet side in a state where the air cleaner device is mounted on a vehicle. A vehicular air cleaner device is proposed, which is arranged to be inclined so as to become lower toward the air outlet side.

  According to the invention described in claim 4, in addition to the configuration of any one of claims 1 to 3, the oil guide member is substantially cross-sectionally formed by one bottom wall and two side walls. A vehicle air cleaner device is proposed which is a letter-shaped member.

  According to the invention described in claim 5, in addition to the configuration of claim 4, one of the two side walls has a height on the blow-by gas inlet side on the air outlet side. A vehicle air cleaner device characterized by being higher than the height is proposed.

  The first blocking wall 22h, the second blocking wall 22p, and the third blocking wall 22q of the embodiment correspond to the blocking wall of the present invention, and the first sidewall 32b and the second sidewall 32c of the embodiment are of the present invention. Corresponds to the side wall.

  According to the configuration of the first aspect, the air containing dust supplied to the dirty chamber from the air inlet of the casing of the air cleaner device is filtered and flows into the clean chamber when passing through the element from the bottom to the top. Then, it mixes with the blow-by gas containing the fuel vapor and oil mist introduced from the blow-by gas inlet and is led out from the air outlet. The blow-by gas inlet and the air outlet are respectively provided on the first and second side surfaces of the casing facing each other, and the first side near the blow-by gas inlet and the second side near the air outlet are provided. Since it is connected by the oil guide member, the oil that is agglomerated in the oil mist contained in the blow-by gas is guided to the air outlet along the oil guide member, so that the oil adheres to the element and the filtration performance decreases. Can be prevented. In addition, since the oil guide member connects the first and second side surfaces of the casing that face each other, the rigidity of the first and second side surfaces is increased to prevent the occurrence of membrane vibration and contribute to the reduction of intake noise. be able to. Further, when blow-by gas is introduced into the casing from the blow-by gas introduction port at a low outside temperature, the oil guide member facing the blow-by gas introduction port covers the portion connected to the first side surface of the casing with the blocking wall. By blocking the low-temperature air introduced from the air inlet into the casing with a blocking wall and making it difficult to directly contact the blow-by gas inlet, the oil content of the blow-by gas freezes and closes the blow-by gas inlet Can be prevented in advance.

  According to the second aspect of the present invention, since the oil guide member includes the shielding part that the blow-by gas introduced from the blow-by gas introduction port collides, the oil mist contained in the blow-by gas is efficiently made into droplets and the oil guide. It can be reliably attached to the member.

  According to the third aspect of the present invention, the oil guide member is inclined and arranged so as to be lowered from the blow-by gas inlet side toward the air outlet port side with the air cleaner device mounted on the vehicle. The oil adhering to the guide member can be smoothly guided to the air outlet port side.

  According to the fourth aspect of the present invention, since the oil guide member is a member having a substantially U-shaped cross section composed of one bottom wall and two side walls, the oil flowing along the oil guide member drops in the middle. It can prevent adhering to the element.

  According to the fifth aspect of the present invention, one of the two side walls of the oil guide member has a height on the blow-by gas inlet side higher than that on the air outlet side. The introduced blow-by gas collides with the high part of the side wall to effectively form droplets, while the side wall on the air outlet side where the blow-by gas does not collide is lowered to reduce the weight of the oil guide member and distribute the air The resistance can be reduced and the volume of the casing can be increased.

The perspective view of the air intake device of a motor vehicle. FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. FIG. 4 is a sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. The perspective view of an upper casing and an oil guide member.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, an automobile intake device includes an air intake duct 12 whose tip is covered with an air intake cover 11, an air cleaner device 13 connected to the downstream side of the air intake duct 12, and a downstream side of the air cleaner device 13. An airflow tube 14 connected to the side of the engine E is provided, and a downstream side of the airflow tube 14 is connected to an intake system of the engine E. The downstream side of the breather tube 15 connected to the crankcase of the engine E is connected to the air cleaner device 13. The outer periphery of the breather tube 15 is covered with a rubber heat insulating tube 16.

  Next, the structure of the air cleaner device 13 will be described with reference to FIGS.

  The air cleaner device 13 includes a casing 23 including a lower casing 21 and an upper casing 22. The lower casing 21 is a container-like member having an open upper surface, and includes a rectangular bottom surface 21a and first to fourth side surfaces 21b to 21e rising from four sides thereof, and a lower surface of the bottom surface 21a. A plurality of reinforcing ribs 21f are formed in parallel to each other, and a coupling flange 21g projecting outward along the edges of the first to fourth side surfaces 21b to 21e is formed. Two coupling protrusions 21h... Project from the position where the coupling flange 21g faces the third side surface 21d and the fourth side surface 21e.

  The upper casing 22 is a container-like member that includes a ceiling surface 22a that is curved in an arc shape and first and second side surfaces 22b and 22c, and the lower surface of which is open, and the ceiling surface 22a and the first and second side surfaces 22b. , 22c is formed with a connecting flange 22d that has the same shape as the connecting flange 21g of the lower casing 21 and projects outward. Two coupling protrusions 22e are projected at positions where the coupling flange 22d faces both ends of the ceiling surface 22a.

  The element 24 for filtering dust contained in the air includes an element body 25 in which a sheet-like filter medium is bent in a bellows shape, a rectangular frame 26 in which the periphery of the element body 25 is fixed, and an outer periphery of the frame 26. The seal member 27 is fixed. With the seal member 27 sandwiched between the coupling flange 21g of the lower casing 21 and the coupling flange 22d of the upper casing 22, the coupling projection 21h of the lower casing 21 and the coupling projection 22e of the upper casing 22 are bolted 28 ... By fastening with nuts 29..., The lower dirty chamber 30 and the upper clean chamber 31 are partitioned with the element 24 sandwiched inside the casing 23.

  On the third side surface 21 d of the lower casing 21, an air introduction port 21 i connected to the downstream end of the air intake duct 12 and a communication hole 21 j communicating with the resonator 17 are arranged in parallel. Further, a blow-by gas introduction port 22f to which the downstream end of the breather tube 15 is connected is formed on the first side surface 22b of the upper casing 22, and an upstream end of the airflow tube 14 is formed on the second side surface 22c of the upper casing 22. An air outlet 22g to which is connected is formed. The blow-by gas inlet 22f and the air outlet 22g are formed perpendicularly to the first and second side surfaces 22b and 22c of the upper casing 22 that are parallel to each other, and therefore the blow-by gas inlet 22f and the air outlet 22g. Are parallel to each other, but are slightly shifted in the longitudinal direction of the air cleaner device 13.

  On the first side surface 22b of the upper casing 22 from which the blow-by gas introduction port 22f protrudes outward, a short cylindrical heat insulating wall 22m that concentrically surrounds the blow-by gas introduction port 22f is formed. A notch 22n is formed in a part of the heat retaining wall 22m in the circumferential direction, and the clip 33 that prevents the breather tube 15 from being removed can be attached and detached through the notch 22n.

  On the inner surface of the ceiling surface 22a of the upper casing 22, a crescent-shaped first blocking wall 22h extending in parallel with the first and second side surfaces 22b, 22c is projected and formed at the lower end of the first blocking wall 22h. An oil guide member 32 that connects the first side surface 22b in the vicinity of the blow-by gas inlet 22f and the second side surface 22c in the vicinity of the air outlet 22g is disposed so as to pass through the notch 22i. The first blocking wall 22h and the first side surface 22b are connected by a connecting wall 22o, a second blocking wall 22p, and a third blocking wall 22q that extend in parallel to each other. Accordingly, the blow-by gas introduction port 22f that opens into the upper casing 22 has five sides except for the lower side by the ceiling surface 22a, the first side surface 22b, the first blocking wall 22h, the second blocking wall 22p, and the third blocking wall 22q. It will be surrounded. In addition, the first blocking wall 22h, the connecting wall 22o, the second blocking wall 22p, and the second side surface 22c constitute a resonator chamber 22r having a square cross section whose one end opens into the clean chamber 31.

  The oil guide member 32 is a bowl-shaped member having a substantially U-shaped cross section, and includes a bottom wall 32a, first and second side walls 32b and 32c rising from both side edges of the bottom wall 32a, and both ends of the bottom wall 32. A pair of attachment portions 32d and 32e extending so as to protrude from both ends of the first and second side walls 32b and 32c are provided. The first side wall 32b of the oil guide member 32 has a lower height on the air outlet port 22g side than a height on the blow-by gas inlet port 22f side, and a portion with the higher height is the shielding portion 32f. . Further, convex portions 22j and 22k are formed on the inner surfaces of the first and second side walls 22b and 22c of the upper casing 22, respectively, and a pair of mounting portions 32d and 32e of the oil guide member 32 are formed on the convex portions 22j and 22k. Are fixed by adhesion.

  Two slits 32g and 32h (see FIG. 7) for avoiding interference with the first blocking wall 22h are formed in the oil guide member 32 that intersects the first blocking wall 22h. Therefore, in a state where the oil guide member 32 is assembled to the upper casing 22, a flow path through which oil can be circulated by the notch 22i of the first blocking wall 22h is provided at the bottom of the oil guiding member 32 that intersects the first blocking wall 22h. Secured.

  With the air cleaner device 13 mounted on the vehicle, the height of the end of the oil guide member 32 on the blow-by gas inlet 22f side is slightly higher than the height of the end on the air outlet 22g side. In other words, the oil guide member 32 is disposed so as to be inclined slightly downward from the end on the blow-by gas inlet 22f side toward the end on the air outlet 22g side (see FIG. 3). The oil guide member 32 is disposed so as to be inclined so that the corners of the bottom wall 32a and the second side wall 32c are the lowest (see FIG. 5). Moreover, it arrange | positions so that the inner surface of the shielding part 32f where the height became high among the 1st side walls 32b of the oil guide member 32 may cross | intersect the extension line of the axis line of blowby gas inlet 22f. Furthermore, the end of the oil guide member 32 on the air outlet 22g side is disposed above the air outlet 22g (see FIGS. 5 and 7). A notch 32j in which the second side wall 32c is notched is formed at the downstream end where the oil guide member 32 faces the air outlet 22g.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  The air introduced into the air intake duct 12 from the tip covered with the air intake cover 11 is introduced into the air cleaner device 13 where the element 24 passes from the dirty chamber 30 side to the clean chamber 31 side to remove dust. The air is supplied to the intake system of the engine E through the airflow tube 14. The breather gas including fuel vapor and oil mist introduced from the exhaust system of the engine E is supplied to the clean chamber 31 of the air cleaner 12 through the breather tube 15, and from there to the intake system of the engine E through the air flow tube 14. By being supplied, diffusion of the fuel vapor and oil mist to the atmosphere is prevented.

  If the oil formed by the oil mist contained in the blow-by gas droplets adheres to the element body 25 of the element 24, the element body 25 is clogged and the dust filtration performance deteriorates, so the oil adheres to the element body 25. It is desirable that the air is supplied to the engine E from the air outlet 22g and burned together with the air-fuel mixture.

  According to the present embodiment, the blow-by gas introduced into the clean chamber 31 from the blow-by gas introduction port 22f collides with the shielding part 32f of the first side wall 32b of the oil guide member 32, and is included in the blow-by gas. The oil mist is converted into droplets to become oil, and flows downward along the bottom wall 32a of the oil guide member 32, whereby the oil mist is temporarily held at the corners of the bottom wall 32a and the second side wall 32c.

  The oil guide member 32 is disposed so as to be inclined downward from the blow-by gas introduction port 22f side toward the air lead-out port 22g, so that the oil is directed toward the air lead-out port 22g along the corners of the bottom wall 32a and the second side wall 32c. And then drops from the downstream end of the second side wall 32c. At this time, the air in the clean chamber 31 is drawn by the negative pressure of the airflow tube 14 and flows into the air outlet port 22g vigorously. Therefore, the oil dropped from the notch 32j at the downstream end of the second side wall 32c The air is sucked into the air outlet 22g by the flow of air and is prevented from adhering to the element body 25 below the air outlet 22g.

  Since the downstream end portion of the oil guide member 32 is located above the air outlet port 22g and does not cover the air outlet port 22g, the oil guide member 32 obstructs the flow of air in the air cleaner device 13. Is minimized. Further, the downstream side portion of the first side wall 32b of the oil guide member 32 does not perform the function of dropletizing the oil mist or the function of guiding the flow of oil, but drops the height of the portion into the droplet of oil mist. By making it lower than the shielding part 32f, the oil guide member 32 can be made as small as possible, contributing to weight reduction and securing the volume of the air cleaner device 13.

  Further, since the first and second side surfaces 22b and 22c of the upper casing 22 are relatively large flat surfaces, there is a possibility of causing membrane surface vibration and causing noise. Since the mounting portions 32d and 32e are fixed to the convex portions 22j and 22k of the first and second side surfaces 22b and 22c, the rigidity of the first and second side surfaces 22b and 22c is increased by the oil guide member 32. Generation of vibration can be prevented.

  When the low temperature air introduced into the casing 23 from the air inlet 21i directly contacts the blowby gas inlet 22f at a low temperature when the outside air temperature is below freezing point, the blowby gas is cooled and the oil component is frozen. There is a possibility of clogging the blow-by gas inlet 22f.

  However, according to the present embodiment, the vicinity of the blow-by gas inlet 22f that opens inside the upper casing 22, that is, the portion where the oil guide member 32 is connected to the first side surface 22b of the upper casing 22 is the first blocking wall 22h, Since it is surrounded from the three sides by the second blocking wall 22p and the third blocking wall 22q, it becomes difficult for the low-temperature air to come into direct contact with the blow-by gas inlet 22f, so that the blow-by gas inlet 22f heated by the blow-by gas is cooled This makes it possible to prevent the blow-by gas introduction port 22f from being clogged due to freezing of the oil content of the blow-by gas.

  Further, the portion where the blow-by gas introduction port 22f protrudes to the outside of the upper casing 22 is also easily cooled by coming into contact with the low-temperature outside air, but the portion is surrounded by a short cylindrical heat insulating wall 22m. The mouth 22f can be made difficult to be cooled, and the oil content of blow-by gas can be prevented more reliably.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, in the embodiment, the first blocking wall 22h, the second blocking wall 22p, and the third blocking wall 22q are provided, but the number and shape of the blocking walls are not limited to the embodiment.

  Further, the shape of the oil guide member 32 is not limited to the embodiment.

13 Air Cleaner Device 21i Air Inlet 22b First Side 22c Second Side 22f Blowby Gas Inlet 22g Air Outlet 22h First Barrier Wall (Barrier Wall)
22p Second barrier (barrier wall)
22q Third barrier (barrier wall)
23 casing 24 element 30 dirty chamber 31 clean chamber 32 oil guide member 32a bottom wall 32b first side wall (side wall)
32c Second side wall (side wall)
32f shielding part 32i shielding part

Claims (5)

By disposing an element (24) for capturing dust contained in the air inside the casing (23) of the air cleaner device (13), a dirty chamber (30) and a clean chamber are respectively disposed below and above the element (24). A vehicle in which a chamber (31) is formed, an air inlet (21i) is provided in the dirty chamber (30), and a blow-by gas inlet (22f) and an air outlet (22g) are provided in the clean chamber (31). An air cleaner device for
The blow-by gas inlet (22f) and the air outlet (22g) are respectively provided on the first and second side surfaces (22b, 22c) of the casing (32) facing each other, and the blow-by gas inlet Oil that guides oil in which oil mist contained in blow-by gas has aggregated between the first side surface (22b) in the vicinity of (22f) and the second side surface (22c) in the vicinity of the air outlet port (22g). A vehicle air cleaner device characterized in that the oil guide member (32) is connected by a guide member (32), and a portion where the oil guide member (32) is connected to the first side surface (22b) is covered with a blocking wall (22h, 22p, 22q). .   The vehicle air cleaner according to claim 1, wherein the oil guide member (32) includes a shielding portion (32f, 32i) against which blow-by gas introduced from the blow-by gas introduction port (22f) collides. apparatus.   With the air cleaner device (13) mounted on the vehicle, the oil guide member (32) is inclined so as to become lower from the blow-by gas inlet (22f) side toward the air outlet (22g) side. The vehicle air cleaner device according to claim 1, wherein the vehicle air cleaner device is disposed.   The oil guide member (32) is a member having a substantially U-shaped cross section comprising one bottom wall (32a) and two side walls (32b, 32c). The vehicle air cleaner device according to any one of the preceding claims.   One of the two side walls (32b, 32c) has a height on the blow-by gas inlet (22f) side higher than that on the air outlet (22g) side. The vehicle air cleaner device according to claim 4.

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