JP2002310016A - Intake precleaner structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake precleaner structure capable of preventing the accumulation of foreign matters such as dust on a bottom part of a housing part, and improving the drainage. SOLUTION: The bottom part of the housing part 8 is provided with a slope part 17 downwardly inclined to the outside to discharge the separated and collected foreign matters to the external.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake pre-cleaner structure for separating and collecting foreign matter such as dust and water contained in air supplied to an engine air cleaner.

[0002]

2. Description of the Related Art Generally, as shown in FIGS.
In the case of a vehicle 1 such as a truck, an air cleaner 3 for supplying air to an engine (not shown) is disposed at a lower portion on one side in the left and right direction on the rear surface of the cab 2 of the vehicle 1. The intake hood 5 is placed on the upper end of the intake duct 4 so that water such as rain can be prevented from entering the intake duct 4 and air can be supplied to the lower surface of the intake hood 5. The air is drawn into the intake duct 4 so as to make a U-turn through the opening formed, filtered by the air cleaner 3, and supplied to the engine as clean air.

[0003]

The structure of the intake duct 4 covered with the intake hood 5 as shown in FIGS. 3 and 4 is excellent in preventing water from being absorbed by rain and has a simple structure. Despite the benefits,
Due to the U-turn intake, there is a disadvantage that the intake resistance is large, which affects the engine performance, and that the splash mist blown up by another vehicle easily enters during traveling.

For this reason, as shown in FIG. 5 and FIG. 6, the inventors of the present invention have designed a side surface (FIG. 5) of an intake duct 4 erected to be connected to an air cleaner 3 for supplying air to the engine of the vehicle 1. A large suction port 6 is opened in the rear side of the vehicle 1 in the example of FIG. 6, and a pre-cleaner 7 that separates and collects foreign matters such as dust and water contained in the air is formed in the suction port 6.
The intake pre-cleaner structure reduces the intake resistance, improves the engine performance, and prevents the entry of foreign substances such as dust and water into the intake duct 4 to improve the reliability of the engine. Development was in progress.

As shown in FIGS. 7 and 8, the pre-cleaner 7 has a box-shaped housing portion 8 having an open surface.
And a wing part 9 integrally assembled so as to cover the opening of the housing part 8. The housing part 8 with the wing part 9 integrally assembled is fitted into the suction port 6 of the intake duct 4. It has become.

A plurality of rows (two rows in the example of FIG. 7) are provided on the wall surface 8a of the housing portion 8 located inside the intake duct 4 in an axial direction of a plurality of rows (five steps in the example of FIG. 7). An inner pipe 10 having both open ends is disposed substantially horizontally.

The inner pipe 1 in the wing section 9
0, the outer pipe 11 whose both ends in the axial direction are open and whose diameter is larger than the diameter of the inner pipe 10 is
It is arranged concentrically with the inner pipe 10.

A cylindrical guide member 12 having a semi-spherical outer portion is disposed concentrically at the front end of the outer pipe 11 on the air inlet side, and the outer periphery of the guide member 12 and the inner periphery of the outer pipe 11 are provided. Are connected by a plurality (eight in the example of FIG. 7) of blades 13 arranged at a required pitch in the circumferential direction to form a swirling flow forming body 14. The swirl flow forming body 14 passes between the blades 13 and
This is for generating a swirling flow in the air introduced therein. For example, the blade 13 has a fan-shaped shape with a twist.

In the pre-cleaner 7 shown in FIGS. 7 and 8, the outer pipe 11, the swirl flow forming body 14 formed by the blades 13 provided between the outer pipe 11 and the guide member 12, and the inner pipe 10, a total of ten sets of separating and collecting units 15 are formed, two rows on the left and right and five steps on the upper and lower sides. Foreign matters such as dust and water separated and collected by the respective separating and collecting units 15 are formed on the housing unit 8. A drain 16 is formed at the lower end of the wing 9 for discharging foreign substances such as dust and water collected at the bottom of the housing 8 to the outside. .

In the precleaner 7 as described above, when the engine is driven, air flows between the blades 13 of the swirling flow forming body 14 in each of the separate collecting portions 15 of the wing portion 9 to generate a swirling force. The fluid is provided and swirled to be introduced into the outer pipe 11. For this reason, foreign matter such as dust and water entrained in the air flows along the inner periphery of the outer pipe 11 due to the centrifugal force, flows out of the downstream end of the outer pipe 11 in the air flow direction, into the housing portion 8, and flows into the housing portion 8. And is discharged to the outside through the drain port 16.

The air from which foreign matter such as dust and water has been removed in the outer pipe 11 is introduced into the intake duct 4 through the inner pipe 10 and goes downward, whereupon the air cleaner 3
And is supplied to the engine as clean air.

However, in the case of the pre-cleaner 7 as shown in FIGS. 7 and 8, since the bottom of the housing portion 8 is flat, foreign matters such as dust and water collected and collected by the housing portion 8 are removed. There is a risk that dust is difficult to be discharged from the bottom to the outside, and that dust accumulates and water accumulates in the housing portion 8.

The present invention has been made in view of the above circumstances, and has as its object to provide an intake pre-cleaner structure that can prevent foreign substances such as dust from accumulating on the bottom of a housing portion and can improve drainage.

[0014]

According to the present invention, a housing portion and a wing portion are integrally formed at a suction opening formed on a side surface of an intake duct which is erected to be connected to an air cleaner for supplying air to an engine of a vehicle. An intake pre-cleaner, which is provided with a pre-cleaner that is attached to the housing and separates and collects foreign matters contained in the air, collects the collected foreign matter at the bottom of the housing part, and discharges the collected foreign matter to the outside, and prevents foreign matters from entering the intake duct. The present invention relates to an intake pre-cleaner structure, wherein a slanted portion is formed at a bottom portion of a housing portion so as to have a downwardly sloping slope for discharging foreign matters separated and collected to the outside. .

According to the above means, the following effects can be obtained.

When air is sucked into the intake duct from the pre-cleaner, foreign matters such as dust and water are separated and collected at the wing portion of the pre-cleaner and collected at the bottom of the housing portion. Foreign matter, such as dust and water, is discharged to the outside along the inclined portion formed at the bottom of the housing portion, and it is difficult for dust to accumulate and water to accumulate in the housing portion.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention. In the drawings, the portions denoted by the same reference numerals as those in FIGS. 5 to 8 represent the same components. 5 to 8
However, as shown in FIGS. 1 and 2, the present embodiment is characterized in that, as shown in FIG. 1 and FIG. The point is that an inclined portion 17 having a downward slope is formed.

In the case of the illustrated example, the inclined portion 17 has a downward slope of a required angle θ1 (see FIG. 1) from the left and right ends of the bottom of the housing portion 8 toward the center, and the rear side of the housing portion 8. Has a downward slope at a required angle θ2 (see FIG. 2) from the wall surface 8a located at the front side to the near side.

Next, the operation of the illustrated example will be described.

When air is sucked into the intake duct 4 from the pre-cleaner 7, the wing 9 of the pre-cleaner 7
The foreign substances such as dust and water are separated and collected in each of the separate collecting sections 15 and collected at the bottom of the housing section 8, and the separated foreign matters such as dust and water are collected by the housing section 8.
The water is discharged to the outside through the drain port 16 of the wing section 9 along the inclined section 17 formed at the bottom of the housing section 8, making it difficult for dust to accumulate and water to accumulate in the housing section 8.

Thus, the accumulation of foreign matter such as dust on the bottom of the housing 8 can be prevented, and the drainage can be improved.

Incidentally, the intake pre-cleaner structure of the present invention is not limited to the above-described illustrated example, and it is needless to say that various changes can be made without departing from the gist of the present invention.

[0024]

As described above, according to the intake pre-cleaner structure of the present invention, it is possible to prevent foreign matters such as dust from accumulating on the bottom of the housing and to improve drainage. Can be played.

[Brief description of the drawings]

FIG. 1 is a front view of an example of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a side view of a vehicle provided with a conventional intake duct.

4 is a view taken in the direction of arrows IV-IV in FIG. 3;

FIG. 5 is a side view of a vehicle equipped with a pre-cleaner which is being developed by the present inventors.

FIG. 6 is a view taken in the direction of arrows VI-VI in FIG. 5;

FIG. 7 is a front view showing a conventional example of the precleaner shown in FIG.

FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle 3 Air cleaner 4 Intake duct 6 Suction port 7 Precleaner 8 Housing part 9 Wing part 14 Swirling flow forming body 15 Separation collection part 16 Drainage port 17 Inclined part

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hideki Endo 3-1-1, Hinodai, Hino-shi, Tokyo Hino Motors, Ltd.

Claims (1)

[Claims] 1. A housing and a wing are integrally assembled to a suction opening opened on a side surface of an intake duct which is erected to be connected to an air cleaner for supplying air to an engine of a vehicle. An intake pre-cleaner structure comprising a pre-cleaner configured to separate and collect contained foreign substances, collect the collected foreign substances at the bottom of the housing part, and discharge the foreign substances to the outside to prevent foreign substances from entering the intake duct. An intake pre-cleaner structure characterized in that an inclined portion having a downward slope is formed at a bottom portion to discharge foreign matters separated and collected to the outside.