JP2002264631A - Intake structure for vehicle cabin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake structure for a vehicle cabin facilitating inspection for clogging. SOLUTION: The intake structure for the interior of a vehicle has a case 9 having a built-in filter 8 and located on the back of the portion of a bonnet 7 adjacent to a passenger compartment 4, with the bonnet 7 covering the top of an engine 5 positioned adjacent the compartment 4. Air is forced through the filter 8 into the compartment 4. The bonnet 7 is provided with an opening 7a through which the approximately flat filter 8 can be moved into and out of the case 9 onto the bonnet 7. A lid 10 having an air vent 10a and covering the opening 7a is openably provided for the bonnet 7. The filter 8 is provided in an upstanding condition inside the case 9 so that, with the lid 10 held open, the intake surface 8b of the filter 8 can be directly viewed from the top of the bonnet 7 through the opening 7a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for intake air into a vehicle cabin.

[0002]

2. Description of the Related Art Apart from natural ventilation by opening and closing windows and a natural ventilation type ventilator, a passenger compartment of a vehicle is provided with a forced ventilation type ventilator and some or all of ventilation, air filtration, dehumidification, cooling and heating and the like. Air conditioners such as a cooler, a heater, and an air conditioner (so-called air conditioner) that forcibly perform the air conditioning. Each of these air conditioners has a fan, and intakes and exhausts outside air by the fan. However, in a vehicle having a narrow passenger compartment, these devices are arranged outside the passenger compartment together with the intake / exhaust structure or only the intake structure is disposed outside the passenger compartment in order to secure the internal volume of the passenger compartment.

[0003] With regard to an intake structure common to both arrangements, among those arranged outside the occupant compartment, a conventional intake structure according to the present invention is described as "a bonnet occupant covering an upper portion of an engine disposed adjacent to the occupant compartment." A structure in which a filter is provided on the back surface adjacent to the passenger compartment, and air is passed through the filter and sucked into the passenger compartment. For example:

Japanese Utility Model Application Laid-Open No. 5-80822 discloses that in the above general structure, an opening is provided in the bonnet so that a flat filter can be inserted into and removed from the bonnet from the inside of the case. It is provided so that it can be opened and closed freely. The number of filters is two, and they are arranged side by side in the case with each intake surface facing upward. Then, each cover is provided slightly upward from each intake surface,
Each cover covers the intake surface. This prevents the filter from getting wet from rainwater that has entered the case through the ventilation hole. The rainwater that has entered the case is discharged to the outside through a drain port provided at the bottom of the case.

[0005]

The technique disclosed in the above publication is the technique disclosed by the applicant of the present invention, and when this technique is used for an actual machine (construction machine such as a bulldozer), the technique of the intake pipe related to the intake structure is not disclosed. Although such projections do not protrude above the bonnet, the appearance and visibility are improved, and there is an advantage that the filter is not wetted by rainwater, but the following inconvenience occurs.

[0006] Construction machines often operate in desert areas, desert areas, onboard ships, etc., where there is a lot of dust (dust and dust), and thus the filters are severely clogged. Therefore, if it is difficult to check the clogging, even if the intake efficiency is reduced, the air conditioner is easily left unattended, and the operation efficiency of the air conditioner is reduced. Therefore, even if an `` dust indicator that indicates the degree of clogging of the filter according to the magnitude of the intake pressure '' commonly used in an engine air cleaner is provided, the intake pressure difference between before and after the clogging in the `` intake structure into the vehicle interior '' of the present invention is considered. Since the difference between the engine intake pressures is much smaller than that of the engine, it is not possible to expect the indication of clogging by the dust indicator. Regardless of the size of the construction machine, the occupant compartment for one person or rarely for two people is small, regardless of its size. Therefore, in the case of small and ultra-small construction machines, it is difficult or impossible to secure a space for arranging the filters in order to increase the intake efficiency or increase the size of the filters.

Specifically, according to the technique disclosed in the above publication, the filter cannot be clogged unless the lid and the two covers are removed. This inspection includes not only visual inspection of the filter, but also a filter replacement operation and a dust removal operation from the clogged filter by applying high-pressure air to the filter removed from the vehicle or hitting the filter. Included (hereinafter the same). Further, even if the vehicle is a small vehicle or a micro vehicle, the engine is relatively large. However, the filter is placed horizontally, so that the case is located above the engine and the height of the hood is increased. That is,
This is an obstacle to downsizing of vehicles required for small vehicles or ultra-small vehicles. In addition, it is a cause of impairing its appearance and visibility. Further, rainwater that has entered the case is discharged to the outside through a drain port, but the discharged water is transmitted to the outer wall of the engine and is contaminated.

The present invention has been made in view of the above-mentioned disadvantages of the prior art,
It is an object of the present invention to provide an air intake structure in a vehicle cabin that can facilitate clogging inspection and at least obtain at least one of compactness, improved appearance, improved visibility, and improved suitability with a surrounding structure of a vehicle.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, an air intake structure into a vehicle cabin according to the present invention comprises, firstly, a hood for covering an upper portion of an engine disposed adjacent to a passenger compartment. Equipped with a case with a built-in filter on the back of the part adjacent to the passenger compartment, and in the intake structure into the vehicle compartment where air flows through the filter and intakes to the passenger compartment side, a substantially flat filter is put in and out of the case onto the hood. A possible opening is provided in the bonnet, and a lid that covers the opening with a vent hole is provided so as to be openable and closable with respect to the bonnet, and the filter, with the lid open, directs the intake surface of the filter through the opening from above the bonnet. It is characterized by being erected in a case so as to be visible.

(1) According to the first structure, the lid can be opened and the suction surface of the filter can be directly viewed through the opening from the hood (preferably, the entire surface of the suction surface can be directly viewed). It can be put in and out of the bonnet through the opening from inside. That is, the clogging of the filter can be visually inspected only by opening the lid. Inspections such as filter replacement can be performed simply by taking the filter out of the case and into and out of the hood through the opening. That is, the inspection is simple and easy, and it is possible to prevent a decrease in the intake efficiency due to the difficulty in the inspection in the related art. (2) The first structure is an intake structure in a vehicle in which a passenger compartment and an engine are arranged adjacent to each other.
Regardless of the size, a valley-like space is created between the passenger compartment and the engine. That is, according to the first structure, the filter is substantially flat, and is erected in the case. That is, the case can be lengthened in the vertical direction, so that the case can be easily inserted and arranged in the valley-shaped space regardless of the size of the vehicle. For this reason, the hood height can be reduced regardless of the size of the vehicle. That is, regardless of the size of the vehicle, it contributes to downsizing of the vehicle itself and improvement in appearance and visibility. You can also use large filters,
Therefore, the clogging life of the filter is extended.

Second, in the above-mentioned first structure, it is desirable that the side wall of the engine of the case is gradually approached to the passenger compartment as it goes downward.

As in the second structure, when the side wall of the engine of the case is gradually lowered toward the occupant compartment, the valley-shaped space between the occupant compartment and the engine can be more effectively used. That is, the case can be inserted and arranged deeper in the valley-shaped space.
Therefore, the height of the bonnet can be further reduced, and the vehicle itself can be made compact, and the appearance and visibility can be further improved. On the other hand, if you do not change the bonnet height,
Larger filters can be employed, thus further extending the clogging life of the filters.

It is preferable that an intake pipe for sucking outside air from the side and / or from below and leading the air to the vent hole is provided on the bonnet so as to be detachable.

(1) When the intake pipe is provided, appearance and visibility are inferior to those without the intake pipe, but early clogging of the filter can be eliminated. That is, dust generally decreases from the ground surface toward the sky. For example, in construction machinery, especially in crawler-type vehicles, the left and right crawler belts soar up during running, but with the intake pipe, there is almost no chance of sucking up the soaring sand (dust), and the filter can be used at an early stage. Clogging can be prevented. Further, even in the operation of a dusty area, the clogging life of the filter can be extended by extending the intake pipe upward. (2) Moreover, the intake pipe sucks outside air from the side and / or from below. Accordingly, rainwater does not enter the case during rainfall, and it is possible to prevent the filter from getting wet.

Further, a dust separator for automatically separating dust in the air is appropriately provided in the lid and / or the intake pipe, and a discharging mechanism is provided for automatically discharging dust separated from the air to the outside of the vehicle by the dust separator. I decided that. As the dust separator, "the one that cyclone the intake air flow" was used. When the intake air flow is cyclone, heavy dust in the cyclone air is blown outward by the centrifugal force based on the cyclone flow, and the intake air that does not contain much internal dust can be guided to the intake surface of the filter Because. As the discharge mechanism, `` a communication pipe communicating from the filter intake surface side chamber in the case to the engine exhaust pipe '' or `` open when the intake is stopped to communicate with the outside air, and closed by the intake pressure of the filter intake surface side chamber at the time of the intake and from the outside air. Open / close valve to shut off. " When the discharge mechanism is a communication pipe, this communication pipe is `` provided from the dust discharge hole provided at the bottom of the filter intake surface side chamber to the engine exhaust pipe ''. According to the above, this on-off valve is "provided in a dust discharge hole provided in the bottom of the filter suction surface side chamber". However, in order to provide a discharge mechanism that can automatically discharge dust separated from the air by the dust separator to the outside of the vehicle, the dust separator must be placed in the vicinity of the dust discharge hole with the lid closed, or Provide a dust outlet located with a gap to the hole. " That is, (1) Since the dust separator is provided in the lid and / or the intake pipe, each operation and effect of the first structure can be maintained. (2) Even dust that is not trapped by the dust separator and the filter and tends to accumulate on the bottom of the filter intake surface side chamber can be discharged to the outside of the vehicle through the discharge mechanism from the space or gap between the dust discharge port and the dust discharge hole. .

Further, a water collector for collecting moisture in the air may be provided on the lid and / or in the intake pipe.

Examples of the water collector include a so-called mist separator and a water collector using a plurality of gutters which will be described later in detail in Examples.
Various preparations are possible.

A second case sharing at least the engine side wall among the side walls of the case may be provided on the back surface of the hood, and the second case may be used as an engine intake passage.

(1) The engine exhaust passage is usually provided on the side opposite to the passenger compartment due to the temperature, components and color of the exhaust, and the engine intake passage is usually provided on the passenger compartment side. That is, the engine intake passage is located near the case. Therefore, "the second case, which shares at least the engine-side wall among the side walls of the case, is provided on the back surface of the bonnet, and the second case is used as the engine intake passage". As a result, a common wall material can be eliminated. In addition, since the engine intake flow path conventionally connected between the engine and the bonnet is replaced with the second case and is provided on the back of the bonnet, the inspection and maintenance of the engine is improved. (2) The case and the second case have a box structure. That is, the torsional rigidity and bending rigidity of the bonnet to which the case and the second case are attached are greatly improved. Therefore, not only the case and the second case but also the bonnet itself can be thinned. In other words, the case, the second case, and the bonnet can be made of, for example, resin. In this case, although the resin is lower in strength than the iron plate, as described above, the torsional rigidity and the flexural rigidity are greatly improved, which can be offset. Further, since the resin is lighter than the iron plate, the increased weight of the second case can be offset. (3) The effects of (1) and (2) are described in claim 11 in the above “Claims”, wherein “at least each wall side of the case is shared with the back reinforcing rib member of the bonnet. It is the same as the bonnet (7).

[0020]

Embodiments and Examples of the Invention Hereinafter, examples will be described with reference to FIGS.
This will be described with reference to FIG. An example machine on which the embodiment is mounted is, as shown in FIG. 1, a bulldozer provided with a blade 1 and made freely movable by a crawler 2. A passenger compartment 4 (so-called “cabin”) and an engine 5 serving as a power source of the blade 1 and the crawler 2 are mounted on the vehicle body 3. The engine 5 is disposed adjacent to the passenger compartment 1 from the front of the passenger compartment 1 to the front. The upper part of the engine 5 is covered with a hood 7 which is detachably installed from the front of the passenger compartment 1 to the upper part of the radiator guard 6 mounted on the front end of the vehicle body 3. A case 9 containing a flat filter 8 is fixedly provided on the back surface of the hood 7 adjacent to the occupant compartment 4. 8 allows the outside air to flow therethrough so as to be sucked into the passenger compartment 4.

A first embodiment of the above example will be described with reference to FIGS. FIG. 2A which is a partial plan view of the example machine.
As shown in FIG. 2B, which is a partial side view, the case 9 is fixed to the back surface of the bonnet around the opening 7a provided in the bonnet 7 by welding or bolting. Opening 7a
Is a size that allows the filter 8 to be inserted and removed between the inside and the outside of the case 9. The hood 7 is provided with a lid 10 for covering the opening 7a so that the opening 7a can be opened and closed freely. The lid 10 can be opened and closed by a detachable type in which the lid 10 itself is detached from the bonnet 7 with a bolt or the like, and a so-called door type in which the lid 10 is opened and closed like a door by using a hinge. In the present invention), either or both may be adopted. For example, in the present embodiment, as shown in FIG.
A hinge 11 is used to open and close the lid 10.
Inserts the shaft 11b into the boss 11a, and then
The locking pin 11c can be freely inserted and removed into and from the hole 11d at the tip of b. In other words, the lid 10 is detachably attached to the bonnet 7 and can be opened and closed in a door manner.

As shown in FIG. 2, the lid 10 has a ventilation hole 10a.
Is provided on the lid 10 around the ventilation hole 10a.
Although the filter 2 is detachably installed, the filter 20 can be inspected and detached by opening the filter 20 with the intake pipe 12 attached. The intake pipe 12 draws in outside air from its side and / or below at its upper end, and guides it to the ventilation hole 10a.

As described above, the case 9 is fixed to the back surface of the hood 7 adjacent to the passenger compartment 4 by welding or bolting. By the way, as shown in FIG.
Is, for example, a pre-cleaner 5a, an air cleaner 5c,
Intake is performed through a turbocharger (not shown), an intercooler (not shown), and an intake manifold 5d in this order, and, for example, an exhaust manifold (not shown)
, A turbocharger (not shown) and an exhaust pipe 5e are exhausted in this order. Here, the engine intake passages are provided from the precleaner 5a to the air cleaner 5c, from the air cleaner 5c to the turbocharger, from the turbocharger to the intercooler, and from the intercooler to the intake manifold 5d. At least one of the roads is constituted by the inner space of the second case 13 fixed to the back surface of the bonnet 7 adjacent to the front side of the case 9. In the present embodiment, as shown in FIG. 2, the engine intake passage 5 b from the pre-cleaner 5 a to the air cleaner 5 c is constituted by the inner space of the second case 13. Moreover, the side wall of the occupant compartment 4 of the second case 13 is shared by the contact surface of the case 9 with the engine side wall 9E. In addition, the engine side wall 9E of the case 9 is shared with the back reinforcing rib member 7b of the bonnet 7. Moreover,
The lower side of the engine side wall 9E is gradually approached to the passenger compartment 4 side.

As shown in FIG. 4, two filters 8 are arranged side by side and the upper ends thereof are respectively inclined backward as shown in FIG.
It is a standing type that is fixed inside. Details are as follows. The case 9 has a single intake air flow between a front room 9F (upstream room) on the side of the ventilation hole 10a and a rear room 9B (downstream room) communicating with the occupant room 4 with the shielding partition 9a provided at the rear as a boundary. Forming a road. The shielding partition 9a has holes 9L, 9R on the front left and right.
Having. At the end of the bottom 9b of the front room 9F on the side of the shielding partition 9a,
A hinge 9c is provided. The hinge 9c is engaged with the lower end of the filter holding plate 9d, and allows the filter holding plate 9d after standing to be tilted back and forth. The filter holding plate 9d also has holes 9L and 9R on the left and right. A lock 9e is provided on the upper end of the filter holding plate 9d. In addition, the shielding partition 9a
A lock 9e is also provided on the upper surface of. The left and right holes 9L and 9R of the shielding partition 9a have the same size as the air discharge surface 8a of the filter 8, while the left and right holes 9L and 9R of the filter holding plate 9d have the same size as the intake surface 8b of the filter 8. Is done. In this embodiment, the filter 8 is a commercially available standard product having a frame 8c protruding substantially at the center and outer periphery in the thickness direction. That is, the discharge / intake surfaces 8a and 8b of the filter 8 have the same size. Accordingly, the left and right holes 9L and 9R of the shielding partition 9a and the filter 8 in this embodiment are also the same size. The bottom 9b of the front chamber 9F is inclined toward a predetermined position, and a dust discharge hole 9f is provided at the inclined end (that is, the bottom). As shown in FIG. 2, one end of a communication pipe 14 communicating with the dust discharge hole 9f is detachably connected to the back surface of the case 9 where the dust discharge hole 9f is located. The other end of the communication pipe 14 is detachably connected to the engine exhaust pipe 5e. That is, the communication pipe 14 connects the inside of the front chamber 9F and the inside of the engine exhaust pipe 5e.

By the way, as shown in FIG.
It is bolted to the vehicle body 3 and is removable.
Since the case 9 is fixed to the hood 7 as described above, the hood 7 is detachably supported on the vehicle body 3. Details will be described in the following procedure for attaching the case 9 to the bonnet 7.

As shown in FIG. 4, pedestals 3a are provided on the left and right main members of the vehicle body 3 on the passenger compartment 4 side, respectively. In order to mount the bonnet 7 on the upper part of the engine 5, the front part of the bonnet 7 is placed at a predetermined position on the radiator guard 6, and the lower left and right rear ends of the case 9 are placed on the left and right pedestals 3a. Then, the front part of the bonnet 7 is locked to the radiator guard 6 by locking means (not shown), and bolts (9 g) provided in the vehicle body 3 through bolt through holes 9 g provided on the right and left rear parts of the case 9. (Not shown). Thereby, the case 9 is fixed to the vehicle body 3. The procedure for removing the bonnet 7 from the upper part of the engine 5 is the reverse of the procedure for mounting the hood 7. still,
The attachment and detachment of the communication pipe 14 and the second
Precleaner 5a and air cleaner 5c for case 13
No attachment / detachment is required. Of course, attachment and detachment of the engine exhaust pipe 5e and other components are also involved, but the attachment and detachment procedures of these other components are irrelevant to the present embodiment, and therefore, the description thereof is omitted.

Next, a procedure for mounting the filter 8 in the case 9 will be described with reference to FIGS. First, the operator opens the lid 10 and tilts the filter holding plate 9d forward. Next, the two filters 8 are set up from the outside through the opening 7a between the filter holding plate 9d and the shielding partition 9a. Next, the both sides 8a and 8b of the discharge / intake surface of each filter 8 are
a and so as to fit in each hole 9L, 9R of the filter 8,
After the filter holding plate 9d is tilted backward and settled, the filter holding plate 9d is completely tilted backward. Then, the filter holding plate 9d comes into close contact with the front surface of the frame 8c of the filter 8, and
The rear surface of c is in close contact with the outer peripheral front surfaces of the left and right holes 9L and 9R of the shielding partition 9a. After that, the filter holding plate 9d is locked to the shielding partition 9a between the two locking fittings 9e. Thus, the mounting of the filter 8 in the case 9 is completed.
The procedure for removing the filter 8 from the case 9 is the reverse of the procedure for attaching the filter 8.

The point to be noted in this embodiment is that the suction surface 8b of the filter 8 fixed in the case 9 (hereinafter simply referred to as "standing") is so designed that the filter 8 can be directly viewed from the opening 7a. The point is that the standing position in the case 9 is set. Although it is necessary to open the lid 10 for direct viewing, this is achieved by the lid 10 being openable and closable with respect to the hood 7 as described above.

The operation and effect of the first embodiment are as follows.

(A1) The lid 10 is opened so that the intake surface 8b of the filter 8 can be directly viewed from the opening 7a, and the filter 8 can be inserted into and out of the case 9 through the opening 7a. Therefore, it is easy and easy to check the clogging of the filter, and it is possible to prevent a decrease in the intake efficiency due to the difficulty in the check in the related art.

(A2) The substantially flat filter 8 is set in the case 9
Was erected inside. In the above embodiment, the passenger compartment 4 and the engine 5
Is an intake structure for a vehicle arranged adjacently. In such a vehicle, a valley-shaped space is generated between the passenger compartment 4 and the engine 5 regardless of the size. That is, the filter 8 in the above-described embodiment is substantially flat, and is erected in the case. That is, the case 9 can be lengthened in the vertical direction, so that the case 9 can be inserted deeply into the valley-shaped space regardless of the size of the vehicle. For this reason, regardless of the size of the vehicle,
The height of the hood 7 can be reduced. That is, regardless of the size of the vehicle, it is possible to reduce the size of the vehicle itself and to improve the appearance and visibility. On the other hand, if the height of the bonnet 7 remains unchanged, a large filter 8 can be used, and the clogging life of the filter 8 is extended correspondingly. That is, the valley-shaped space between the passenger compartment 4 and the engine 5 can be effectively used.

(A3) In addition, the engine side wall 9E of the case 9 is gradually approached to the passenger compartment 4 as it goes downward. That is, the case 9 can be inserted and disposed deeper into the valley-shaped space between the passenger compartment 4 and the engine 5. Accordingly, the height of the hood 7 can be further reduced, and the vehicle itself can be made more compact, and the appearance and visibility can be further improved. On the other hand, if the height of the bonnet 7 remains unchanged, a larger filter 8 can be used, and the clogging life of the filter 8 is further extended accordingly. That is, the valley-shaped space between the passenger compartment 4 and the engine 5 can be used more effectively. In addition, it is possible to smoothly guide the introduced outside air also to the lower side of the filter 8 which is erected.

(A4) A second case 13 is provided on the back surface of the bonnet 7, and its internal space is used as an engine intake passage 5b from the pre-cleaner 5a to the air cleaner 5c. Therefore, there is no need for the conventional pipe that constitutes the engine intake passage 5b disposed above the engine 5, which makes the engine cleaner and easier to inspect and maintain. Also, for example, from the precleaner 5a to the air cleaner 5c, from the air cleaner 5c to the turbocharger, from the turbocharger to the intercooler, from the intercooler to the intake manifold 5d, and from the air cleaner 5c to the intake manifold 5c.
For each of some of the engine intake flow paths up to d, a plurality of second cases 13
The inside may be divided into a plurality of parts by a shielding wall or may be individually corresponded. In this case, all the pipes of each engine intake passage are eliminated, which makes the engine cleaner and easier to inspect and maintain. Further, the case 9 and the second case 13 have a box structure, and the engine side wall of the case 9 is shared with the back reinforcing rib member 7b of the bonnet 7, so that the torsional rigidity and the bending rigidity of the bonnet 7 itself are greatly reduced. improves. Therefore, the case 9 and the second case 13 can be reduced in thickness as well as the bonnet 7 itself. The bonnet 7 is usually a steel plate. However, as described above, the bonnet 7 can be made of a resin, for example, in order to secure rigidity even when the thickness is reduced. As a preferable example of the resin, engineering plastics (engineering plastics) that are light and have a rigidity basically equivalent to that of a steel plate, are easy to process, and are easy to paint.

(A5) The bottom 9b of the front chamber 9F is an inclined bottom,
A dust discharge hole 9f is provided at the bottom. Therefore, heavy dust such as sand that has fallen to the inclined bottom 9b before passing through the filter 8 automatically reaches the dust discharge hole 9f and is discharged to the outside from the dust discharge hole 9f.

(A6) A communication pipe 14 for communicating the inside of the chamber 9F with the inside of the engine exhaust pipe 5e is provided in the dust discharge hole 9f. That is, the exhaust flow velocity in the engine exhaust pipe 5e is high.
Therefore, the pressure at the opening of the communication pipe 14 in the engine exhaust pipe 5e is lower than the intake pressure in the communication pipe 14 (that is, in the case 9). Therefore, when the engine 5 is operated, heavy dust such as sand that has fallen on the bottom 9b of the front chamber 9F and has reached the dust discharge hole 9f before passing through the filter 8 passes through the communication pipe 14 from the dust discharge hole 9f. It is sucked into the engine exhaust pipe 5e and released to the atmosphere from the engine exhaust pipe 5e.
The so-called "mist spraying principle" occurs.

An example of the first embodiment will be described.

(1) If "the lid 10 is opened and the intake surface 8b of the filter 8 is directly visible from the opening 7a" in the above (A1), it can be obtained even if each filter 8 is placed horizontally. The above-mentioned (A2) operation and effect due to the above-mentioned “almost flat filter 8 being erected in the case 9” and the above-mentioned “and the lower the engine side wall 9E of the case 9, the more the passenger compartment 4
Considering the effect of the above (A3) due to "closed to the side", the range of the standing angle of the filter 8 in the case 9 is substantially vertical (90 ° ± 5%) of the filter 8,
It is considered that a backward tilt state from a substantially vertical (90 °) state to about 45 ° to 55 ° is optimal.

(2) When the case 9 is bolted to the back surface of the bonnet 7, it is desirable that the case 9 be interposed with a sealing material 9S illustrated in FIG. That is, the engine 5 has, for example, a breather (not shown) on its rocker arm cover (not shown), and a small amount of atomized engine lubricating oil is discharged from the breather and is constantly floating in the engine room. And
Since the engine lubricating oil in the engine room is slightly drifted by a constant amount, it is sucked into the case 9 through the gap between the case 9 and the bonnet 7 and contaminates the intake surface 8b of the filter 8. , Shortening its service life.
The sealing material 9S prevents this.

A second embodiment will be described with reference to FIG. A cyclone-type dust separator 15 illustrated in FIG. 6 is provided inside the intake pipe 12. This dust separator 15 is connected to the intake pipe 1
The intake air flow in 2 is cycloneized. That is, in the present embodiment, a hollow conical body 15a that is opened downward at the lower surface is attached to the upper center of the intake pipe 12. Cone 15a
A spiral wing 15b is provided on the outer periphery of. Intake pipe 1 at a position spaced downward by a predetermined gap from the lower surface of cone 15a
2 The outer periphery of the inclined shielding partition 15d is welded to the inner wall. A ventilation pipe 15c is vertically penetrated in the center of the inclined shielding partition 15d. The upper surface of the ventilation pipe 15c opens in the hollow of the cone 15a, and the lower surface opens on the case 9 side. Also,
A dust discharge pipe 1 is provided at the bottom 15e of the inclined shielding partition 15d.
5f is provided. The dust discharge pipe 15f is a flexible pipe made of, for example, a resin hose, and hangs down in the front chamber 9F. The lower end of the dust discharge pipe 15f is a dust discharge port 15g.
However, when the lid 10 is closed, the dust outlet 15g hangs down so as to be located almost directly above the dust outlet 9f in the bottom 9b of the front chamber 9F or at a position having a minute gap. It is. A communication pipe 14 reaching the inside of the engine exhaust pipe 5e is detachably connected to the dust discharge hole 9f. The reason why the dust discharge pipe 15f is a flexible pipe is that the dust discharge pipe 15f bends even when it hits the side wall of the front chamber 9F and / or the end of the opening 7a of the bonnet 7 when the lid 10 is opened and closed. This is to prevent opening and closing.

The operation and effect of the second embodiment are as follows.

Various types of cyclone-type dust separators 15 can be prepared.
When the cyclone is used, the heavy dust in the cyclone air is blown outward by the centrifugal force based on the cyclone flow, and the clean air with the reduced inward dust can be guided to the intake surface of the filter. is there. (B1) That is, according to the dust separator 15, the intake pipe 12
The intake air flow of the air is cyclone-formed by the spiral blade 15b provided on the outer periphery of the cone 15a. Therefore,
Much dust in the air is blown to the inner wall of the intake pipe 12 by centrifugal force based on the cyclone, and falls along the inner wall of the intake pipe 12 onto the inclined shielding partition 15d. The dust that has fallen on the inclined shielding partition 15d rolls down or slides down on the inclined shielding partition 15d, and forms a dust discharge pipe 15f.
The lower end of the dust discharge pipe 15f passes through the dust discharge port 15g, the dust discharge hole 9f in the bottom 9b of the front chamber 9F, and the communication pipe 14 in this order, and is discharged from the engine exhaust pipe 5e to the atmosphere. Although it depends on the type of dust, 70 to 80% of ordinary dust can be collected by the dust separator 15.
On the other hand, air containing 20 to 30% of fine dust is sucked into the front chamber 9F from the intake pipe 12 and purified by the filter 8. That is, according to the simple calculation, the clogging life of the filter 8 is extended to three to five times as compared with the first embodiment in which the dust separator 15 is not provided. Therefore, this embodiment is suitable for a vehicle that operates in an extremely dusty environment. (2) With the dust outlet 15g closed with the lid 10 closed,
It is located almost directly above the dust discharge hole 9f on the bottom 9b of the front chamber 9F or has a minute gap. Therefore, without being captured by the dust separator 15 and the filter 8, the front chamber 9F
Dust falling onto the bottom 9b of the
A dust discharge hole 9f through a gap between the dust discharge hole 9f and the dust discharge hole 9f;
The gas is discharged from the engine exhaust pipe 5e to the atmosphere via the communication pipe 14.

An example of the second embodiment will be described.

(1) In the second embodiment, the dust separator 15
Is provided inside the intake pipe 12, but the dust separator 15 may be provided on the back surface of the lid 10 around the ventilation hole 10a. Or
The dust separator 15 may be provided from the inside of the intake pipe 12 to the back surface of the lid 10 around the ventilation hole 10a. Although these have a difference in arrangement, they have the above-described operation and effects unique to the second embodiment.

(2) In the first and second embodiments, the communication pipe 14 extending into the engine exhaust pipe 5e is detachably connected to the dust discharge hole 9f, but the communication pipe 14 is replaced with the communication pipe 14 as shown in FIG. , Via a pipe 15 or directly on / off valve 16 (1 in FIG. 7).
6A or 16B) in FIG. 8 may be detachably connected.

It is desirable that the on-off valve 16 be one that opens automatically when intake is stopped and automatically closes by intake pressure (a pressure lower than the atmospheric pressure) of the front chamber 9F during intake. For example:

The on-off valve 16A shown in FIG. 7 is of a rubber type.
This is because when the internal and external pressures of the valve are atmospheric pressure, the pressure in FIG.
As shown in the figure, the lower end is opened by a predetermined gap by the tension of the rubber material itself (that is, when the intake is stopped, the front chamber 9F is closed).
When the pressure inside the valve is lower than the pressure outside the valve (atmospheric pressure), that is, the differential pressure becomes FIG. 7 (b) when the force generated by the differential pressure on the inner and outer pressure receiving surfaces at the lower end overcomes the tension force of the rubber material itself.
As shown in (2), the gap is closed (that is, automatically closed at the time of intake because the intake pressure of the front chamber 9F is lower than the atmospheric pressure).

The on-off valve 16B shown in FIG.
6B. This is because when the internal and external pressures of the valve are the atmospheric pressure, as shown in FIG.
The opening in the valve is opened by a predetermined gap due to the extension force of a (that is, when the intake is stopped, the front chamber 9F and the outside are automatically opened because the atmospheric pressure is applied), and the dust in the valve is dropped to the outside. When the pressure is lower than the pressure outside the valve (atmospheric pressure), that is, when the differential pressure is generated and the force generated by the differential pressure on the inner and outer pressure receiving surfaces at the lower end portion overcomes the elongation force and the spring 16Ba contracts, As shown in FIG. 8B, the gap is closed (that is, automatically closed during intake because the intake pressure of the front chamber 9F is smaller than the atmospheric pressure).

A third embodiment will be described with reference to FIGS. In the second embodiment, the dust separator 15 is connected to the intake pipe 12.
In the third embodiment, each of the dust separators 15 is replaced with a water collector 17 (in addition, the dust separator is provided). The device 15 and the water collector 17 may be provided at the same time.) FIG. 9 shows that the water collector 1 is attached to the lid 10 around the ventilation hole 10a.
7 is provided. In FIG. 9, the cover 18 that covers the ventilation hole 10 a and the water collector 17 is provided on the lid 10 instead of the intake pipe 12. The cover 18 and the lid 10 are connected to the passenger compartment 4
The lower end of the opening is slightly higher than the upper surface of the lid 10 so that rainwater falling on the lid 10 does not flow into the case 9. The water collector 17 itself may be a so-called mist separator that collects fine moisture in the air. In the example of FIG. 9, however, the rebound water of rainwater falling on the lid 10 enters the case 9. A gutter-type collector 17 which is mainly shown in FIG. Details are as follows.

As shown in FIG. 10, the gutter type collectors 17 are a plurality of gutters 17a which are spaced side by side by a dimension slightly smaller than the width of one gutter 17a and are arranged side by side in parallel (inclined because they are gutters). Are arranged in three layers in a staggered pattern. A tray 17b is provided below the inclined end of the gutter 17a, and a drain pipe 17d penetrating downward is fixed to the bottom 17c of the tray 17b. On the other hand, on the side wall of the front room 9F, a drain pipe 17e penetrating in and out is fixed. When the lid 10 is closed, the lower end of the drain pipe 17d enters the upper opening of the drain pipe 17e. Drain pipe 17e
Has an opening toward the ground surface through a hole (not shown) provided in a lower protective cover (not shown) of the engine 5 along the side of the engine 5.

The gutter type collector 17 may be a so-called mist separator for collecting fine water in the air.

[Brief description of the drawings]

FIG. 1 is a side view of an example machine (bulldozer) on which an embodiment is mounted.

FIGS. 2A and 2B are schematic views of the first embodiment, wherein FIG. 2A is a partial plan view of the example machine, and FIG. 2B is a partial side view of the example machine.

FIG. 3 is a perspective view of a portion P1 in FIG.

FIG. 4 is an assembly drawing of a case and a drawing of a filter.

FIG. 5 is a view showing how a sealing material is assembled on the upper surface of a case.

FIG. 6 is a partial detailed sectional view of the second embodiment.

FIGS. 7A and 7B are perspective views of a first example of the on-off valve, in which FIG. 7A shows a state where suction is stopped (when opened and when dust is dropped), and FIG. 7B shows a state where suction is performed (when closed and dust is collected).

FIGS. 8A and 8B are perspective views of a second example of the on-off valve, wherein FIG. 8A shows a state when suction is stopped (when opened and when dust is dropped), and FIG. 8B shows a state where suction is performed (when closed and when dust is collected).

FIG. 9 is a partial detailed sectional view of the third embodiment.

FIG. 10 is a perspective view of a portion P2 in FIG. 9;

[Explanation of symbols]

4: passenger compartment, 5: engine, 5b: engine intake passage,
5e: engine exhaust pipe, 7: bonnet, 7a: opening,
8: Filter, 8a: Filter intake surface, 9: Case, 9
F: filter suction side chamber (front chamber), 9b: bottom of front chamber, 9
E: Case engine side wall, 9f: Dust exhaust hole, 1
0: lid, 10a: vent, 12: intake pipe, 13: second case, 14: communication pipe, 15: dust separator, 15g: dust outlet, 17: water collector.

Claims (11)

[Claims] A case (9) having a filter (8) built therein is provided on the back surface of a bonnet (7) that covers an upper portion of an engine (5) disposed adjacent to a passenger compartment (4) and adjacent to the passenger compartment (4). In the intake structure to the vehicle interior, in which air flows through the filter (8) and is taken into the passenger compartment (4), a filter (8) that is almost flat
(9) The hood (7) is provided with an opening (7a) through which the hood (7) can be taken in and out of the hood (7), and a lid (10) that has an air hole (10a) and covers the opening (7a) is attached to the hood (7). The filter (8) is provided with the lid (10) open,
An intake structure into a vehicle interior, wherein an intake surface (8b) of a filter (8) is erected in a case (9) so as to be directly visible from above a bonnet (7) through an opening (7a). 2. An engine side wall (9E) of a case (9) is gradually approached to an occupant compartment (4) side downward.
The intake structure into the vehicle interior as described in the above. 3. A dust separator (15) for flowing into the ventilation hole (10a) and / or cycloneizing the intake air flowing through the ventilation hole (10a) is provided in the lid (10). From the dust discharge hole (9f) provided at the bottom (9b) of the filter intake surface side chamber (9F) to the engine exhaust pipe (5e), the filter intake surface side chamber (9F)
A communication pipe (14) communicating from the inside to the engine exhaust pipe (5e) is provided, and the dust separator (15) is closed with the lid (10) closed.
Located near the dust outlet (9f) or the dust outlet
The intake structure for a vehicle interior according to claim 1 or 2, further comprising a dust outlet (15g) positioned with a gap to (9f). 4. A dust separator (15) for flowing into the ventilation hole (10a) and / or cycloneizing the intake air flowing through the ventilation hole (10a) is provided in the lid (10), and the dust separator (15) in the case (9) is provided. Dust discharge holes (9f) provided at the bottom (9b) of the filter suction side chamber (9F)
An open / close valve (16) is provided to open and communicate with the outside air when the intake is stopped, and to close and shut off from the outside air by the intake pressure of the filter intake surface side chamber (9F) at the time of intake, and a dust separator (15) has a lid.
With (10) closed, a dust outlet (15g) is provided near the dust outlet (9f) or with a gap to the dust outlet (9f). Claim 1
Or the intake structure into the vehicle compartment according to 2. 5. A water collector (17) for flowing into the air hole (10a) and / or collecting moisture in the air flowing through the air hole (10a).
The air intake structure for in-vehicle interior according to any one of claims 1 to 4, characterized in that a cover (10) is provided on the lid (10). 6. An intake pipe (12) for sucking outside air from the side and / or from below and guiding the air to the ventilation hole (10a) is detachably provided on the bonnet (7). 3. The intake structure into a vehicle cabin according to 1 or 2. 7. A dust separator (15) for cycloneizing an intake flow flowing through an intake pipe (12) is provided in an intake pipe (12), and a bottom of a filter intake surface side chamber (9F) in a case (9). A communication pipe (14) is provided from the dust exhaust hole (9f) provided in (9b) to the engine exhaust pipe (5e) to communicate from the filter intake surface side chamber (9F) to the engine exhaust pipe (5e), and dust is separated. Tableware (15)
Has a dust outlet (15g) located in the vicinity of the dust outlet (9f) or with a gap to the dust outlet (9f) with the lid (10) closed. The intake structure into a vehicle compartment according to claim 6, characterized in that: 8. A dust separator (15) for cycloneizing an intake air flowing through an intake pipe (12) is provided in the intake pipe (12), and a bottom of a filter intake surface side chamber (9F) in a case (9). The dust discharge hole (9f) provided in (9b) is provided with an open / close valve (16) that opens when intake is stopped and communicates with outside air, and is closed by intake pressure of the filter intake surface side chamber (9F) and shuts off from outside air during intake. When the lid (10) is closed, the dust separator (15) is located in the vicinity of the dust discharge hole (9f) or has a gap with respect to the dust discharge hole (9f). The air intake structure into a vehicle compartment according to claim 6, further comprising an outlet (15g). 9. The intake pipe (12) further comprising a water collector (17) for collecting moisture in the air flowing through the intake pipe (12). The intake structure into the vehicle interior according to the above. 10. A second case (13) sharing at least a wall (9E) on the engine (5) side of a side wall of the case (9) is provided on the back surface of the hood (7), and the second case (13) is provided. ) Is used as an intake passage (5b) for the engine (5). 11. An engine (5) arranged adjacent to a passenger compartment (4).
A hood (7) that covers the upper part of the hood (7) has a case (9) with a built-in filter (8) on the back surface adjacent to the occupant compartment (4), and allows air to flow through the filter (8) to the occupant compartment (4) side. An opening (7a) that allows the almost flat filter (8) to enter and exit the bonnet (7) from inside the case (9) in the intake structure into the vehicle compartment
Is provided on the hood (7), and the lid (10) having the ventilation hole (10a) and covering the opening (7a) is shared as a part of the hood (7), and is provided to be openable and closable with respect to the hood (7). An intake structure into a vehicle interior, wherein at least each wall side of the case (9) is shared with a back reinforcing rib member (7b) of the bonnet (7) and integrally formed with the bonnet (7).