JPH04104153U - Automotive engine intake system - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent water and dust from entering the intake air, and to cool the engine compartment by using the air flowing inside the frame. [Structure] Air flowing in from the air inlet of the front bumper is passed through the air passage 4 in the side frame 2, and the air passage 4 is blocked off by leaving an appropriate circulation opening 9 at the upper part of the side frame 2 at an appropriate location. By disposing the baffle plate 8, water and dust are separated and removed from the intake air flowing in the air passage 4. Further, an air outlet 11 into the engine room is opened at a position forward of this baffle plate 8, and a normally closed valve body 12 is provided, and this valve body 12 is opened by the dynamic pressure of the air flow when the vehicle is running. to supply cooling air into the engine room.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an intake device for an automobile engine.

0002

[Conventional technology]

Conventionally, the engine intake system mainly used in cab-over type automobiles was As shown in FIG. This air is flowed rearward through the side frame 22 with a hollow cross section, and the air is Insert the air cleaner 25 into the intake port formed on the upper surface of the air frame 22 at an appropriate location. The inlet pipe 24 is connected and the air that has passed through the air cleaner 25 is sucked into the engine 26. The air manifold is configured to supply air to the air manifold.

0003 Also, as disclosed in Japanese Utility Model Application Publication No. 59-1097, between the side frames The cross frame that connects the parts is made hollow so that air can be sucked into it. has also been proposed.

0004

[Problem that the idea aims to solve]

However, with the configuration of the intake system shown in Figure 3 above, when driving in the rain, in flooded waterways, or on rough roads, In addition, water and dust flow into the side frame 22, and these are absorbed together with the air. There was a problem with this. Also, while the car is running, the inside of the side frame 22 may be Although the flowing air has considerable dynamic pressure, most of that dynamic pressure is not utilized. There wasn't. On the other hand, in cab-over type cars, the engine compartment is clogged. It is said that the inside of the engine room tends to get hot because there are few outside air intakes. There was a problem.

[0005] Additionally, the intake device in the above publication cannot prevent water, dust, etc. from getting into the intake air. However, the configuration of the cross frame becomes complicated and the dynamic pressure of the air cannot be used effectively. There is a problem with not being able to do so.

[0006] In view of these conventional problems, this invention has been developed to prevent water and dust from entering the intake air. In addition to preventing air flow, it also makes effective use of the dynamic pressure of the air flowing inside the side frame. The object of the present invention is to provide an intake device for an automobile engine that achieves the following.

[0007]

[Means to solve the problem]

This invention uses an air inlet opening in the front bumper that extends in the longitudinal direction of the vehicle body. Connect to a frame with an empty section, and make a suitable circulation opening in the upper part of this frame at a suitable place. A baffle plate is installed to block the air flow path by leaving a An air outlet into the engine room is opened in the engine room, and the air outlet is connected to the frame. Equipped with a normally closed valve body that is opened by the dynamic pressure of the air flowing inside, and It is characterized by an air cleaner suction pipe connected to the rear position.

[0008]

[Effect]

According to this invention, air flows into the frame from the air inlet of the front bumper. When the air collides with the baffle plate, its flow velocity decreases, causing water and dust to enter the air. Even if the air contains air, it is separated by gravity at the front of the baffle plate, and only air flows through the upper part of the baffle plate. It flows backwards through the mouth and is sucked in through the air cleaner suction pipe. Therefore, It is possible to reliably prevent water and dust from entering the intake air. Also, at the front of the baffle plate As the air flow rate decreases, the pressure increases due to dynamic pressure, and as a result, the valve body is pushed open. Air flows out from the air outlet into the engine room, and the engine room is replaced. This ensures that the air is heated properly and prevents the engine compartment from becoming too hot. Moreover, the car body When the machine is stopped, the air outlet is closed by the valve body, so equipment during maintenance cannot be inserted. I never get into it.

[0009] Furthermore, if the suction end of the air cleaner suction pipe is opened toward the front, The dynamic pressure of the air flow can be used for intake without the risk of inhaling water or dust. It is also possible to improve the filling efficiency of intake air.

0010

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

[0011] In Fig. 1, 1 is a front bumper located at the lower part of the front end of the vehicle body. An air inlet 3 is opened at a position facing the front end of the side frame 2 on one side. It is. The side frame 2 is composed of a hollow cross-sectional member with a rectangular cross-section. The internal space is used as an air passage 4. E on side frame 2 An air cleaner 6 is disposed on the side of the engine 5, and its suction pipe 7 is connected to the air passage. It is connected to 4. The air that has passed through the air cleaner 6 is then fed into the engine 5. The intake manifold is configured to supply the intake manifold.

0012 At an appropriate distance ahead of the air cleaner 6 in the side frame 2, there is a As shown in FIG. is installed. On the upper surface of the side frame 2 located in front of this baffle plate 8, An air outlet 11 into the engine room 10 is opened. This air outlet 1 1 is provided with a normally closed valve body 12 that is opened by the dynamic pressure of the air flowing in the air passage 4. ing. This valve body 12 may be always closed by its own weight, but the side flap When providing the air outlet 11 on the side of the frame 2, always use a biasing means such as a spring. It may be closed at the same time. Also, on the lower wall of the side frame 2 in front of the baffle plate 8. A small discharge hole 13 is drilled to discharge separated water and dust. Ru.

[0013] The tip of the suction pipe 7 of the air cleaner 6 penetrates the upper wall of the side frame 2. It is bent forward, and the suction port 7a at the tip is opened forward.

[0014] In the above configuration, from the air inlet 3 of the front bumper 1 to the side frame 2 The air that has flowed into the air passage 4 collides with the baffle plate 8, and its flow velocity increases. descend. Therefore, the water and dust contained in the air are absorbed by gravity at the front of the baffle plate 8. separated and only air flows rearward through the flow opening 9 in the upper part of the baffle plate 8. separated The water and dust that have been drained fall downward from the discharge hole 13 and are discharged. Separate and remove water and dust The air flowing backward through the circulation opening 9 flows through the intake port opened toward the front. It enters the intake pipe 7 from 7a and passes through the air cleaner 6 to the intake manifold of the engine 5. supplied to the field.

[0015] In this way, water and dust are removed from the air flowing into the air passage 4 in the side frame 2. Even if it is contained, it will be separated and removed by the baffle plate 8, so when driving in the rain or in flooded water Water and dust may be sucked into the air cleaner 6 even when driving on rough roads. There is no. Also, if the suction port 7a of the suction pipe 7 is opened toward the front, the above-mentioned The movement of the car while driving must be carried out without the risk of water or dust getting into the intake air. The filling efficiency of intake air can be increased using pressure.

[0016] In addition, since the air flow velocity decreases in the front part of the baffle plate 8, the pressure increases due to dynamic pressure. As a result, the valve body 12 is pushed open and the air outlet 1 is opened as shown by the imaginary line in FIG. Air flows out from 1 into the engine room 10, ensuring ventilation of the engine room 10. Since the heating is performed at a high temperature, it is possible to prevent the engine room 10 from becoming hot. Also, the car body During maintenance, the air outlet 11 is always closed by the valve body 12 when the system is stopped. There is no possibility of equipment getting into the area.

[0017]

[Effect of the idea]

According to the automobile engine intake device of the present invention, the air inlet of the front bumper The air flowing into the frame collides with the baffle plate, reducing the flow velocity and causing the air to The contained water and dust are separated by gravity at the front of the baffle plate, and only the air is released above the baffle plate. The intake air is drawn from the air cleaner's intake pipe through the circulation opening in It can reliably prevent water and dust from getting inside. In addition, in the front part of the baffle plate, dynamic pressure Therefore, the pressure is high, and as a result, the valve body is pushed open and air leaks from the air outlet to the engine room. Air flows out inside the engine compartment, ensuring ventilation of the engine compartment. The cooling performance of the system is improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an intake device according to an embodiment of the present invention.

FIG. 2 is a longitudinal cross-sectional view of a main part of the embodiment shown in FIG. 1;

FIG. 3 is a perspective view of a conventional intake device.

[Explanation of symbols]

1 Front bumper 2 Side frame 3 Air inlet 4 Air passage 5 Engine 6 Air filter 7 Suction pipe 8 Baffle plate 9 Flow opening 10 Engine room 11 Air outlet 12 Valve body

Claims (1)

[Scope of utility model registration request] [Claim 1] An air inlet opened in a front bumper is connected to a frame having a hollow cross section extending in the longitudinal direction of the vehicle body,
A baffle plate is placed at an appropriate location on the frame to block the air flow path while leaving an appropriate flow opening at the top, and an air outlet into the engine room is opened in the frame at a position forward of the baffle plate. For use in automobiles, the air outlet is provided with a normally closed valve body that is opened by the dynamic pressure of the air flowing within the frame, and an air cleaner suction pipe is connected to a position rearward of the baffle plate of the frame. Engine intake system.