JPH0562316U - Engine intake system - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The intake passage length of the outside air introduction pipe can be set longer to reduce intake resistance, reduce intake noise, and prevent radiant heat from the engine and other effects. Ensure intake efficiency. [Structure] An intake device for an engine, in which an opening 2e of an outside air introduction pipe 2 is provided so as to be substantially parallel to a side wall of an engine room 21 and faces the engine 7 side, and the outside air introduction pipe 2 is provided. (Intake distribution parts) Air cleaner 1,
(Accessory parts) Radiator tank 5, Relay box 4,
The opening 2e is opened in the space H formed by the battery cover 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

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

[0002]

[Prior Art]

 The trend of vehicle design in recent years is to reduce the bonnet. With this tendency, the radiator volume is increased to supplement the cooling by the running wind, but as a result, the space of the engine room (especially in the vertical direction) becomes smaller and smaller, and the distribution with the outside air introduction pipe It is difficult to install components such as air cleaner, carburetor or accessories such as battery, radiator auxiliary tank and relay box.

On the other hand, the outside air introducing pipe can reduce the intake resistance and the intake noise by setting the intake passage length as long as possible, but the outside air introducing pipe has a long intake passage length due to the restriction of the space. It is difficult to make it long. Therefore, there has been proposed a configuration of an engine intake device in which the opening of the outside air introduction pipe is made substantially parallel to the side wall of the engine room and is provided so as to face the engine side. (For example, Japanese Unexamined Utility Model Publication No. 3-42060) By thus constructing and disposing the outside air introducing pipe, the intake passage length can be set longer and the intake resistance can be reduced.

[0004]

[Problems to be solved by the device]

 However, in the above proposal, since the opening of the outside air introduction pipe faces the engine side, there is a problem that the intake efficiency is lowered as a result of sucking the fresh outside air whose temperature has risen due to the radiant heat from the engine. In addition, the radiant heat from the engine, which fills the engine room, travels through the back of the bonnet and reaches the opening of the outside air introduction pipe, which sucks in the outside air that has risen in temperature and reduces the intake efficiency. There is a problem. That is, there is an increasing tendency due to the above-mentioned low bonnet.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to set the intake passage length of the outside air introduction pipe to be long to reduce the intake resistance. The purpose is to reduce intake noise and prevent intake heat and other effects from the engine to secure intake efficiency. Further, in addition to the above-mentioned object, the object of the invention of claim 2 is to ensure the intake efficiency by preventing the hot air filled in the engine room from passing through the back side of the hood and reaching the opening of the outside air introduction pipe. is there.

[0006]

[Means for Solving the Problems] and

[Action]

 In order to solve the above problems and achieve the object, the present invention has the following configurations. Immediately, an intake device for an engine, in which an opening of the outside air introduction pipe is provided so as to be substantially parallel to the side wall of the engine room and faces the engine side, and the intake device is provided with the outside air introduction pipe. At least a part of the components mounted in the engine compartment is arranged between the opening and the engine, and the intake air circulation component provided with the outside air introduction pipe and the space portion constituted by the components By opening the above-mentioned opening, the intake passage length of the outside air introduction pipe is set longer to reduce the intake resistance, reduce the intake noise, and raise the temperature of fresh outside air due to radiant heat from the engine and others. Work to prevent and ensure intake efficiency.

[0007] Preferably, an airtight member that acts on the intake air circulation component and the ceiling surface of the component to seal the ceiling portion of the space portion is laid on the back surface of the bonnet, so that the hot air filled in the engine room is filled. Is transmitted through the back side of the bonnet and does not reach the opening of the outside air introduction pipe, and works to secure intake efficiency.

[0008]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an external perspective view of a main part of an intake device for an engine of a first embodiment, and FIG. 2 is a plan view thereof. In both figures, the state in the vicinity of the front right tire house is shown in the engine room 21 of the vehicle 20 shown by the chain line in the figures. In this figure, an engine 7 is arranged in the center of an engine room 21. The engine 7 has an air cleaner 1 and a duct 9 for supplying fresh air from the air cleaner 1 to the engine 7. Is provided.

The air cleaner 1 has a ceiling portion 1 a which is substantially flat as shown in the drawing, and is formed in a substantially “U” shape along the lateral width direction of the engine room 21 and has a circular cross-sectional shape. The introduction pipe 2 is provided at the mounting base 2a. The outside air introducing pipe 2 has a first pipe portion 2b extending downward from the mounting base 2a, a second pipe portion 2c extending laterally, a third pipe portion 2d extending upward, and an opening portion as shown in the figure. The second pipe portion 2f is formed integrally with the side wall of the engine room 21 so as to be substantially parallel to the side wall of the engine room 21 and to face the engine 7 side. As shown in FIG. 2, the fourth pipe portion 2f is held in a hole formed in the shroud 22 forming the lateral wall of the engine room 21, and the opening 2e is desired in the space H of the engine room 21. The structure is such that the space of the engine room 21 occupied by the outside air introduction pipe 2 is made as small as possible.

On the other hand, around the outside air introduction pipe 2, a radiator tank 5 having an approximately flat ceiling portion 5a which is an engine accessory, a relay box 4 having an approximately flat ceiling portion 4a, and a bonnet rear surface are provided. A battery cover 3 having a flat surface portion 3a conforming to the shape is provided, and a space H is formed so that the opening 2e of the outside air introduction tube 2 is opened in the space H.

Further, FIG. 3 is a side view of FIG. 2, and the description will be omitted by assigning the same reference numerals to the already described portions. A front duct 25 shown by a chain double-dashed line passing below and being introduced into the engine room 21 is provided. The battery cover 3 is detachably provided so as to cover the upper surface of the battery 30. The duct 8 provided in the air cleaner 1 is provided at a position where the outside air introducing pipe 2 is attached and the air flows in a substantially straight line from the base portion 2a, thereby reducing the suction resistance.

In the configuration described above, fresh outside air once enters the engine room 21 through the front duct 25 in the direction of the solid line arrow in the figure, and enters from the opening 2e of the outside air introducing pipe 2 into the direction of the arrow indicated by the broken line. , Enters into the air cleaner 1 through the fourth pipe portion 2f, the third pipe portion 2d, the second pipe portion 2c, and the first pipe portion 2b. After that, fresh outside air is supplied to the engine through the duct 8. As described above, the opening of the outside air introduction pipe faces the engine side, but since the space H is secured by the above-mentioned accessory parts, the emission from the engine when the warm-up operation of the engine progresses. The fresh outside air whose temperature has risen due to heat is no longer sucked. As a result, the intake efficiency can be prevented from decreasing.

Furthermore, since the space H where the opening 2e opens is covered, the water splashed up during running can be prevented from entering through the opening 2e. Next, the second embodiment will be described again with reference to FIGS. 1, 2 and 3. A rubber lip 6 shown by a chain line in each drawing is laid on the back surface of the hood 23, and the radiator tank 5 The ceiling 5a, the ceiling 1a of the air cleaner 1, the ceiling 5a of the relay box 4, and the flat surface 3a of the battery cover 3 can be hermetically sealed.

With the above structure, the above-mentioned space H is also made airtight in the vertical direction, and the radiant heat from the engine, which is the radiant heat from the engine, fills the inside of the engine room and is transmitted to the back side of the bonnet 23. It is possible to prevent the outside air that has risen in temperature from being sucked in so that it does not reach the room. As a result, it is possible to prevent the intake efficiency from decreasing, and it is possible to effectively deal with the tendency toward a low bonnet.

FIG. 4 is a front view of only a main part of the third embodiment as viewed from the front of the vehicle. For example, when passing over a large amount of water pool during high speed traveling, a radiator fan or the like is used. This shows how the splashed water enters through the opening 2e. According to the conventional configuration, the water that has entered the outside air introduction pipe flows back into the outside air introduction pipe after the engine is stopped, and then enters the combustion chamber after the engine is restarted, which destroys the engine due to so-called liquid compression. become.

Therefore, as shown in FIG. 4, a wall portion 27 extending upward is formed inside the attachment base portion 2 a of the outside air introduction pipe 2, a water pool W is provided, and water is drained from the drain 28. This structure prevents backflow into the outside air introduction pipe after the engine is stopped. Here, the invention of the present application is not limited to the configuration of the above-described embodiment, and it goes without saying that the setting can be appropriately changed without departing from the gist of the invention, and a direct intake device without an air cleaner is provided. Of course, an outside air introduction pipe may be provided, and the accessory parts are not limited to those described above.

[0017]

[Effect of the device]

 As described above, according to the present invention, the intake passage length of the outside air introduction pipe can be set to be long to reduce the intake resistance, reduce the intake noise, and prevent the effects of radiant heat from the engine and other intake efficiency. Can be secured. In addition, the intake air can be secured by preventing the hot air filled in the engine room from passing through the back side of the bonnet and reaching the opening of the outside air introduction pipe.

[Brief description of drawings]

FIG. 1 is an external perspective view of an intake device for an engine according to a first embodiment and a second embodiment.

2 is a plan view of an intake device for the engine of FIG. 1. FIG.

3 is a side view of an intake device for the engine of FIG. 1. FIG.

FIG. 4 is a front view of a third embodiment.

[Explanation of symbols]

 1 air cleaner (intake air distribution part), 2 outside air introduction pipe, 3 battery cover (accessory part), 4 relay box (accessory part), 5 radiator tank (accessory part), 6 rubber lip, 7 engine.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Akira Kawakami 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Motor Corporation

Claims (2)

[Scope of utility model registration request] 1. An intake device for an engine, wherein an opening of an outside air introduction pipe is provided so as to be substantially parallel to a side wall of an engine room and faces the engine side, and intake air is provided. Of the components and the components mounted in the engine room, at least a part of the components is disposed between the opening and the engine, and the intake air circulation component provided with the outside air introduction pipe, and the space portion composed of the components. An intake device for an engine, characterized in that the opening is opened with respect to. 2. The intake system for an engine according to claim 1, wherein an airtight member that acts on the intake circulation component and the ceiling surface of the component to seal the ceiling portion of the space portion is laid on the back surface of the bonnet. The intake system for an engine according to claim 1, wherein: