JPH0413380Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention has a supercharger in the intake passage of the engine, and an intercooler that cools the supercharged air supercharged by the supercharger. The present invention relates to an intake device for an automobile engine.

[Conventional technology]

A conventional intake system for an automobile engine is known as shown in Japanese Utility Model Application No. 57-193028, but in order to effectively cool supercharged air supercharged by a supercharger with an intercooler, Generally, the intercooler has a large volume and is made of a soft material such as aluminum or brass to facilitate heat exchange. Therefore, the intercooler is installed separately from the engine at a location in front of the vehicle body where it is easily exposed to the wind.

[The problem that the idea attempts to solve]

However, the intercooler is connected to the engine's intake system, and engine vibrations, especially rolling low-frequency vibrations with large amplitudes, are transmitted and a large force is applied to the mounting bases of the intercooler's inlet and outlet pipes. In addition, intercoolers made of soft materials have the problem of being easily damaged.

For this reason, conventional devices have a structure in which the intercooler and the engine intake system are connected through an intake pipe formed of an elastic material to prevent engine vibrations from being transmitted to the intercooler as much as possible. However, since the intake pipe of this elastic body is located downstream of the supercharger and receives supercharging pressure, its rigidity cannot be reduced unnecessarily, and the above problem has not yet been solved. In other words, if the rigidity of the intake pipe is greatly reduced, expansion and contraction fatigue of the intake pipe due to the supercharger discharge pressure is likely to occur.To prevent this, increasing the rigidity of the intake pipe to a certain extent will sufficiently suppress the transmission of engine vibration. The problem remains that it is no longer possible.

The present invention was developed to solve the above-mentioned conventional problems, and suppresses the expansion and contraction fatigue of the elastic intake pipe due to the supercharging pressure of the supercharger, while also preventing engine vibrations from being transmitted to the intercooler. It is an object of the present invention to provide an intake device for an automobile engine that can prevent damage to an intercooler and improve reliability against vibrations of a vehicle body.

[Means to solve the problem]

In this invention, a supercharger is interposed in the intake passage that supplies intake air to the engine, and an intercooler for cooling the intake air is interposed in the intake passage downstream of the supercharger. In an intake system for an automobile engine that is fixed to a vehicle body, a vehicle body frame exists between the intercooler, the engine, and the supercharger, and the upper end of the vehicle body frame is above the intercooler, engine, and supercharger. At the same time, the intercooler is attached to the vehicle body frame, and the intercooler is attached to an intake pipe made of an elastic material to the upstream intake system including the supercharger and the downstream intake system leading to the engine. and an intake intermediate member which is more rigid and is interposed near the intercooler of this intake pipe, and the intake intermediate member is connected to the upstream part of the intercooler and the downstream part of the intercooler. The body frame has a structure in which the side portions are connected to each other, and one end thereof is bent so as to cross the upper part of the body frame and face the intercooler, and the body frame is connected to the body frame near the part where the intercooler is attached to the body frame. The intake intermediate member is fixed to the upper end.

[Function] With this configuration, the intake pipe becomes flexible between the intake intermediate member fixed to the vehicle body frame near the intercooler and the engine and supercharger, and engine vibrations are transferred to the intercooler through the intake pipe. prevent it from being transmitted to In addition, the engine and supercharger are located close to each other in a predetermined location in the engine room, and the intercooler needs to be placed in a location where it can easily catch the wind while driving. The positional relationship between the intake intermediate member and the intercooler is as described above, and with this positional relationship, it is necessary to suppress relative vibration between the intake intermediate member and the intercooler and ensure strength against vehicle body vibration. This effect can be obtained.

〔Example〕

An embodiment of the present invention will be described below based on the drawings. In Figures 1 to 4, 1 is an engine, an intake manifold 2 and an exhaust manifold 3.
has. Various members constituting an intake passage are connected to the intake manifold 2. That is, a supercharger 4 for supercharging intake air is interposed at the upstream end, and an intake pipe 5a, an intake intermediate member 6, an intake pipe 7a, and an inlet pipe 8a of an intercooler 8.
The intercooler 8 is connected through the outlet pipe 8b of the intercooler 8, and the throttle chamber 10 and the surge tank 11 are connected via the intake pipe 7b, the intake intermediate member 6, the intake pipe 5b, and the intake pipe member 9. is connected to the intake manifold 2. Connection for connecting the intercooler 8 to the upstream intake system and the downstream intake system, respectively, by the intake pipe 5a, the intake intermediate member 6, and the intake pipe 7a, and the intake pipe 7b, the intake intermediate member 6, and the intake pipe 5b. consists of parts. Each of the above members is connected and fixed using a hose band.

12 is a blower intake port of the supercharger 4 connected to an air filter (not shown). In this embodiment, the supercharger 4 is a so-called turbo type that is driven by the exhaust gas of the engine 1, but is not limited to this, and may be a mechanical type that is driven by the engine output shaft. It may be of.

The supercharger 4 is fixed to the engine 1 and placed at a predetermined position in the engine room together with the engine 1. On the other hand, the intercooler 8 is attached to the vehicle body frame 13 on the front side of the engine room so that it can easily receive the traveling wind. is placed in front of. Therefore,
A body frame 13 exists between the intercooler 8, the engine 1, and the supercharger 4, and the upper end of the body frame 13 is located above the intercooler 8, the engine 1, and the supercharger 4. It is arranged as follows. The intercooler 8 is fixed to the front side of the vehicle body frame 13.

The intake pipes 5a, 5b and the intake pipes 7a, 7b
is made of an elastic material such as rubber. The intake intermediate member 6 is made of aluminum die-casting or the like, and has higher rigidity than the intake pipes 5a, 5b, 7a, and 7b. 5
It is interposed between b and 7b. The intercooler upstream side portion and the intercooler downstream side portion of the intake intermediate member 6 are integrally connected, and are bent so that one end thereof crosses above the vehicle body frame 13 and faces the intercooler 8. It has a shape. The intake intermediate member 6 is fixed to the upper end of the vehicle body frame 13 in the vicinity of a portion where the intercooler 8 is attached to the vehicle body frame 13. Specifically, car body frame 1
3, as shown in FIGS. 3 and 4, a mounting piece 6a provided on this member 6 is fixed by tightening a fastener 6c such as a bolt through a rubber bush 6b. There is.

Another example of fixing the intake intermediate member 6 is to fix it to the vehicle body frame 13 using an elastic member 6b' formed to surround the intake intermediate member 6, as shown in FIG. , various things are possible.

In this way, the intake manifold 2 to the intake pipe member 9 and the supercharger 4 are fixed to the engine 1 side as an intake passage on the engine 1 side, while the intercooler 8 to the intake intermediate member 6 are fixed as the intercooler 8 side. Intake pipes 5a, 5b, 7a, 7b are fixed to the vehicle body frame 13, and the intake passage on the engine side and the intercooler 8 are made of elastic members.
and are connected by an intake intermediate member 6.

Next, the effect will be explained. Intake air taken in through the intake port 12 is supercharged by a supercharger 4, further cooled by an intercooler 8, and supplied to the engine 1 via a throttle chamber 10, a surge tank 11, and an intake manifold 2. Here, depending on the operating state of the engine 1, the engine 1 exhibits low frequency vibrations with large amplitudes such as rolling, and this vibration tends to be propagated to the intercooler 8 via various members forming the intake passage. However, in the present invention, the intake pipes 5a, 5b are formed of an elastic body, and the portions of the intake pipes 5a, 5b on the side far from the engine 1 are connected to the intake intermediate member 6.
is fixed to the vehicle body frame 13, the propagation of the vibration to the intercooler 8 and its inlet pipe 8a and outlet pipe 8b is significantly reduced. That is, engine vibrations are first attenuated by the intake pipes 5a and 5b made of the above-mentioned elastic bodies, and are further damped by the highly rigid intake intermediate member 6 fixed to the vehicle body frame 13 near the intercooler 8. Since the intercooler upstream portion and the intercooler downstream portion of this intake intermediate member 6 are connected, the rigidity of this portion is ensured and the damping effect is enhanced. Therefore, the inlet pipe 8a, outlet pipe 8b, etc. of the intercooler 8 are prevented from being damaged by vibrations transmitted from the engine.

Furthermore, since the intercooler 8 and the intake intermediate member 6, which have high rigidity, are fixed to the same vehicle body frame 13 at positions close to each other, the intercooler 8 and the intake intermediate member 6 are prevented from being damaged by vehicle body vibration.
There is no difference in vibration between the two, and uneven loads due to vehicle body vibrations are prevented from being applied to the connection between the intercooler 8 and the intake intermediate member 6 or being transmitted to the intercooler 8. Damage due to vibrations is also prevented.

Furthermore, due to the positional relationships between the intercooler 8 and the engine 1, the supercharger 4, and the vehicle body frame 13 as described above, the intake passage between the intercooler 8, the engine 1, and the supercharger 4 has the vehicle body frame 13
It is necessary to provide a bent portion that bends from above toward the intercooler 8, and a large load due to vehicle body vibration tends to act on this bent portion. This also ensures strength against the above load.

Furthermore, in this embodiment, since the intake intermediate member 6 is elastically supported via the rubber bushing 6b, etc., it is possible to prevent high frequency vibrations with small amplitudes from propagating to the vehicle body 13, thereby preventing noise in the vehicle interior.

[Effect of idea]

As described above, according to the present invention, the intercooler and the engine intake system are connected by an intake pipe made of an elastic body and an intake intermediate member having higher rigidity than the intake pipe,
The intake intermediate member has a structure that combines the upstream and downstream parts of the intercooler, and the intake intermediate member is fixed to the vehicle body frame near the intercooler, so engine vibrations are attenuated by the intake pipe and then the intake The vibration is damped by the intermediate member, and engine vibration does not directly act on the inlet pipe and outlet pipe of the intercooler, thereby preventing damage to them. Furthermore, since the intercooler and the intake intermediate member are fixed to the same vehicle frame at positions close to each other, uneven loads due to vehicle body vibrations are not applied to the connecting portion between the intercooler and the intake intermediate member. Further, since the bent portion that bends from above the vehicle body frame toward the intercooler is formed in the intake intermediate member with high rigidity, the strength of the bent portion against vehicle body vibration is ensured. Therefore, damage caused by vehicle body vibration can also be prevented.

[Brief explanation of drawings]

FIG. 1 is a side view of an automobile engine intake system according to an embodiment of the present invention, FIG. 2 is a top view of the same device, FIG. 3 is an enlarged top view of the main parts of the device, and FIG. 3 is a cross-sectional view taken along the line 3, and FIG. 5 is a cross-sectional view showing another embodiment of the intake intermediate member. 1...Engine, 4...Supercharger, 5a, 5b...
...Intake pipe, 8...Intercooler, 13...Vehicle frame.

Claims (1)

[Scope of utility model registration request] A supercharger is installed in the intake passage that supplies intake air to the engine, and an intercooler that cools the intake air is installed in the intake passage downstream of the supercharger, and this intercooler is fixed to the vehicle body. In an intake system for an automobile engine, a vehicle body frame exists between the intercooler, the engine, and the supercharger, and the upper end of the vehicle body frame is located above the intercooler, the engine, and the supercharger. Then, the intercooler is attached to the body frame, and the intercooler is attached to an intake pipe made of an elastic body and an intake pipe made of an elastic body to the upstream intake system including the supercharger and the downstream intake system leading to the engine. The connection is made by a connection part consisting of an intake intermediate member which has high rigidity and is interposed near the intercooler of the intake pipe, and the intake intermediate member connects the intercooler upstream part and the intercooler downstream part. The structure is such that the intercooler is connected to the upper end of the body frame in the vicinity of the part where the intercooler is attached to the body frame. An intake device for an automobile engine, characterized in that an intake intermediate member is fixed.