JPS5936686Y2 - Air cleaner with auxiliary intake port - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air cleaner used for an engine of an automobile or the like, and more particularly to an air cleaner with an auxiliary intake port provided with means for dealing with water intrusion into the intake port.

Air cleaners installed in the intake system of engines such as automobiles may not be attached to the carburetor of the engine, but may be attached to the lower part of the vehicle body, depending on the vehicle type, such as a truck, due to the installation space and the like.

In such cases, conventional air cleaners simply introduce outside air through an intake port that communicates with an air passage formed in the vehicle frame, so when the vehicle passes through a puddle, a large amount of air is generated. There is a risk that water may enter the air cleaner through the frame, etc., and block the intake port, preventing outside air from being introduced.Furthermore, in this state, the negative pressure in the intake passage increases due to the blockage of the intake port, causing water to enter the air cleaner. There was a problem in that they penetrated into the combustion chamber of the engine, rendering the engine unusable.

In view of these circumstances, the present invention has been developed by providing an auxiliary intake port at a higher position than the main intake port that introduces outside air during normal operation, so that when the main intake port is blocked by water, the auxiliary intake port is installed. To provide an air cleaner with an auxiliary intake port that allows outside air to be taken in through the mouth, thereby making it possible to introduce outside air even in such an emergency, while preventing water from entering the engine. It is.

That is, the present invention includes a filtration element held in a case, a first space formed outside the element, a second space formed inside the element, an intake port communicating with the first space, An air cleaner including an exhaust port located in the upper part of the case and communicating with the second space,
An auxiliary intake port is connected to the first space at a position higher than the intake port, the auxiliary intake port having a valve that opens when the air pressure in the first space drops by a predetermined amount or more below atmospheric pressure, Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, 1 is an engine body, 2 is an intake manifold, 3 is a carburetor, and 4 is an intake pipe connected to the carburetor 3.

On the other hand, the air cleaner 10 is mounted at a suitable location below a vehicle body 5 of an automobile or the like, and its discharge port 19 communicates with the suction pipe 4 through a suitable conduit 4a.

Furthermore, the frame 6 of the vehicle body 5 is formed in the shape of a square pipe or the like, thereby forming an air passage 6a therein for introducing outside air into the air cleaner 10.

7 is an engine exhaust passage; 8 is a cover provided outside the exhaust passage; 9 is a warm air passage that allows warm air around the exhaust passage 7 to be introduced into the air cleaner 10; The opening and closing of the opening into the air cleaner 10 is controlled by a control valve 9a.

FIG. 3 shows an enlarged cross section of the air cleaner 10, and in the same figure, a cylindrical stream application element 12 is held in the case 11 via a mounting frame 13, 14, and a first space is formed around the H law of the element 12. 15 is formed, and a second space 16 is formed inside the element 12.

An intake port 17 is communicated with the first space 15 .

Further, the exhaust port 19 is located above the case 11 and communicates with the second space 16, and in the figure, the exhaust port 19 communicates with the second space 16 via the third space 18 above the case 11.

With this structure, the air taken in from the intake port 17 enters the first space 15, and then, while passing through the filtering element 12, dust etc. are removed, and the air purified in this way enters the second space. 16 and a third space 18 to be sent to the engine from the exhaust port 19.

In this case, in the embodiment, an air introduction passage 20 is provided on a part of the outer periphery of the case 11, protruding outward and extending in the vertical direction,
An intake port 17 is formed near the lower end of the passage 20, and the intake port 17 is communicated with the air passage 6a formed in the frame 6 via a conduction passage 21. A communicating hole 22 to the space 15 is formed.

Further, an auxiliary intake port 23 is connected to the upper end of the first space 15.

That is, the auxiliary intake port 23 is located at a higher position than the intake port 17.

A check valve 24 is provided at the auxiliary intake port 23.

This valve 24 is configured to open when the air pressure in the first space 15 drops by a predetermined value or more than the atmospheric pressure, that is, when the negative pressure is greater than a predetermined value using a spring 24a or the like.

By doing so, in normal conditions when outside air can be taken in from the main intake port 17, the valve 24 of the auxiliary intake port 23 is closed.
When the main intake port 17 is blocked with water and the negative pressure associated with engine operation increases and the pressure inside the case 11 drops below a predetermined level, the valve 24 opens.

The auxiliary intake port 23 is connected to an auxiliary intake pipe 25 extending upward, and the opening end of the pipe 25 is located as high as possible in relation to the vehicle body 5.

The operation of this air cleaner 10 will be explained next.

In a normal state in which water does not enter the intake system when the engine is operating, water passes through the air passage 6a of the frame 6 to the intake port 17 due to negative pressure caused by engine operation.
Air is taken into the air cleaner 10 from the air cleaner 10, and after being subjected to the purifying action described above, is sent to the engine.

In this case, the reason why the intake port 17 of the air cleaner 10 is communicated with the air passage 6a formed in the frame 6 of the vehicle body is to increase the noise reduction effect by increasing the length of the air passage, and also to allow water to flow directly from the outside to the intake port 17. This is because they are trying to avoid entering.

However, even if you do this, the air cleaner 10 is not connected to the vehicle body 5.
In a structure that is mounted below, the intake port 17 and the frame 6 are located low, so when the vehicle passes through a deep puddle, water enters the intake port 17 through the frame 6, and this water causes the air intake The mouth 17 may become blocked.

When the intake port 17 is blocked with water in this way, in the conventional structure, the negative pressure in the intake passage of the engine increases, the negative pressure in the case 11 of the air cleaner 10 also increases, and water is sucked into the combustion chamber of the engine. be done.

However, in the present invention, at this time, the auxiliary intake port 23
The valve 24 provided in the auxiliary intake port 23 is opened, and outside air is taken into the air cleaner 10 through the auxiliary intake port 23.

This ensures the supply of air necessary for the engine, while also reducing the negative pressure, preventing water accumulated in the intake port 23 from entering the combustion chamber of the engine, and maintaining engine operation. become.

In this case, since the auxiliary intake port 23 is connected to the upper end of the first space 15 and is located at a higher position than the main intake port 17, it is difficult for water to enter the auxiliary intake port 23 from the outside. A situation in which the auxiliary intake port 23 is blocked by water entering through the air intake port 17 is unlikely to occur.

Therefore, outside air can be introduced effectively.

Furthermore, as shown in the embodiment, by connecting the auxiliary suction pipe 25 extending upward to the auxiliary intake port 23, water intrusion into the auxiliary intake port 23 can be more reliably prevented.

Note that it is not preferable if air always enters from the auxiliary intake port 23 because it impairs the silencing effect, so in the present invention, during normal operation, outside air is taken in from the main intake port 17.
In an emergency when the air intake port is blocked by water, outside air is taken in through the auxiliary intake port 23.

That is, the valve 24 is set so that the auxiliary intake port 23 is closed during normal conditions, and is opened only in the above-mentioned emergency.

Furthermore, as shown in the embodiment on the intake side of this air cleaner 10, if an air introduction passage 20 is provided in which an intake port 17 is formed near the lower end and the upper end communicates with the first space 15, The water that entered from the air inlet passage 20
It only accumulates in the inner lower part and does not reach the first space 15.
, wetting of the filtering element 12 can be controlled as much as possible.

Incidentally, the accumulated water can be removed by appropriately disassembling the air cleaner 10 or removing the conduction path 21 between the air intake port 17 and the frame 6.

Although FIG. 3 shows the valve 24 biased by a spring 24a, a reed valve type having a tongue valve may also be used.

As mentioned above, the air cleaner of the present invention has, in addition to the normal intake port that communicates with the first space formed on the outside of the filtration element in the case, an auxiliary intake located in the first space at a higher position than the above-mentioned intake port. and the auxiliary intake port is provided with a valve that opens when the air pressure in the first space is lower than the outside pressure by a predetermined amount, so that the air intake port is connected to the frame of the vehicle body. When installing the air cleaner below the vehicle body so that it communicates with the road, even if water enters from outside and blocks the intake port, air is still supplied to the engine by taking in outside air from the auxiliary intake port. supply and can prevent water from entering the combustion chamber of the engine.

Therefore, the operation of the engine can be maintained even in such an emergency.

In particular, in normal conditions, the auxiliary intake port is closed by the valve to maintain a good sound deadening effect, and air is taken in from the main intake port, but in an emergency when the intake port is blocked with water, the valve opens. Air is taken in through the auxiliary intake port, and since this auxiliary intake port is located higher than the main intake port, water does not get into it, thereby keeping the engine working well. It is something that can be done.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a schematic front view showing the arrangement of the air cleaner and engine of the invention, Fig. 2 is a schematic plan view thereof, and Fig. 3 is an enlarged sectional view of the air cleaner of the invention. It is. 10... Air cleaner, 11... Case, 12... Filtration element, 15...
...First space, 16...Second space, 17...
...Intake port, 18...Third space, 19...
...Discharge port, 23...Auxiliary intake port, 24.
·····valve.

Claims (1)

[Claims for Utility Model Registration] ■ A filtration element held in a case, a first space formed according to the 99 rules of the element, a second space formed inside the element, and a first space. In the air cleaner comprising a communicating intake port and an exhaust port located at the top of the case and communicating with the second space, the air pressure in the first space is set to atmospheric pressure at a position higher than the intake port in the first space. 1. An auxiliary intake date air cleaner, characterized in that an auxiliary intake port is connected to the auxiliary intake port provided with a valve that opens when the temperature drops by more than a predetermined value. 2. Providing an air introduction passage that extends in the vertical direction by protruding from a part of the outer circumference of the case, forming an intake port at the bottom of the air introduction passage, and connecting the intake port to an air passage formed within the frame of the vehicle body. 2. The auxiliary intake date air cleaner according to claim 1, wherein the upper part of the air introduction passage is communicated with the first space. 3. Utility model registration claim 1, characterized in that the auxiliary intake port is connected to an auxiliary intake pipe extending upward.
An auxiliary intake date air cleaner as described in paragraph 1 or paragraph 2 of the same.