JPS6345548Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an intake system for an automobile engine that includes a supercharger and an intercooler that cools supercharged air supercharged by the supercharger.

(Prior Art) In conventional intake systems for automobile engines, the intercooler has a relatively large volume and is mounted on the vehicle body separately from the engine in order to effectively obtain a cooling effect. It is necessary to connect the intercooler and the pipe member that constitutes the intake passage on the engine side with an intake pipe, and in order to prevent engine vibrations from being transmitted to the vehicle body, the intake pipe is generally made of an elastic material. used. When connecting intake pipes in this way, there is a method in which at least one of the intake pipes is made of an elastic body with a bellows pipe section to absorb relative vibrations (for example, Utility Model Application No. 57-96875 Publication No.).

However, in such a connection structure using a tube, it is necessary to reduce the thickness of the tube material of the bellows tube part in order to increase elasticity, but in an engine with a supercharger interposed in the intake passage, During supercharging, the intake pressure becomes high in the region downstream of the supercharger, so there is a risk that the bellows tube section may expand and break, or that the sealing performance of the connection section may deteriorate.
On the other hand, in a coupling device that connects exhaust pipes using bellows tubes, it is known to cover the outer periphery of the bellows tube with an annular protective tube for the purpose of suppressing the vibration of the bellows tube itself and protecting it from flying stones. (For example, Utility Model Application Publication No. 57-33218, Utility Model Application Publication No. 56-71589). However, the devices shown in these publications are not intended for the air supply pipe that is equipped with a supercharger and expands during supercharging, but are intended for the exhaust pipe, and also have a Both ends of the protective tube are secured with bands. Therefore, there is a problem in that engine vibrations are transmitted to the vehicle body through the protective tube.

(Purpose of the invention) The present invention was made to solve the above-mentioned conventional problems, and includes a guide member that guides the bellows pipe part of the intake pipe in an appropriate state during supercharging and non-supercharging. To provide an intake device for an automobile engine in which expansion of the bellows pipe part due to supercharging pressure can be prevented, the wall thickness of the bellows pipe part can be made thin, and transmission of engine vibration to the vehicle body can be reduced. The purpose is to

(Structure of the invention) The present invention provides a supercharger in the intake passage that supplies intake air to the engine, an intercooler in the intake passage downstream of the supercharger, and the intercooler in the vehicle body. In a fixed intake system for an automobile engine, the intake passages on the intercooler side and the engine side are connected by an intake pipe having a bellows tube section formed of an elastic member, and the bellows tube section is guided from its outer peripheral surface. A guide member is disposed so as to have a predetermined distance from the outer circumferential surface during non-supercharging, and the guide member is fixed to the intake passage on either side.

With this configuration, even if the wall thickness of the bellows tube section is thin, the guide member can prevent the bellows tube section from expanding during supercharging, and the transmission of engine vibrations to the intercooler can be reduced. be.

(Example) An example of the present invention will be described below in Figures 1 and 2.
This will be explained using figures.

Reference numeral 1 denotes an engine, which has an intake manifold 2 and an exhaust manifold 3, and the intake manifold 2 includes a so-called turbo-type supercharger 4, which supercharges intake air by obtaining driving force from exhaust gas. An intercooler 5, a throttle chamber 6, and a surge tank 7 that cool intake air are connected via an intake pipe 8, an intake connecting pipe 9, an intake pipe 10, and an intake pipe member 11, and these constitute an intake passage. ing. 12 is an intake port connected to an air filter (not shown); 13 is a guide member made of rubber or synthetic resin that connects the intake pipe 8 and the intake connection pipe 9; and 14 is a guide member that connects the guide member 13 to the intake connection pipe 9. A band for fixing to the pipe 9; 15 is an inlet pipe of the intercooler 5 (the outlet pipe is not shown in the drawing); 16 is a vehicle body; the intercooler 5 is mounted on the vehicle body 16; Furthermore, the intake connecting pipe 9 is also connected to the vehicle body 16.
installed on.

The intake pipe 8 is made of an elastic member such as rubber, and the intake connection pipe 9 is made of a rigid member made of aluminum die-cast molding. is provided with a bellows tube portion 8a, and this bellows tube portion 8a is formed thin in order to improve elasticity. Further, the distal end portion 8b of the intake pipe 8 is fitted onto the outer peripheral surface of the intake connecting pipe 9. Then, the bellows tube section 8
The guide member 13 with a booth 〓 on the outer peripheral surface of a
is provided, and the inner peripheral surface of this guide member 13 is positioned so as to guide the bellows tube portion 8a.
Note that one end of the guide member 13 is fitted onto the outer periphery of the tip 8b of the intake pipe 8 fitted to the intake connecting pipe 9, and is fixed by tightening the band 14. . Further, in this embodiment, a plurality of protruding pieces 8c are integrally formed on the outer surface of the bellows tube portion 8a, and these protruding pieces 8c are made to face the booth with the guide member 13.

In addition, from the intake manifold 2 to the intake pipe member 11
The supercharger 4 is fixed to the engine 1 side as an intake passage on the engine 1 side, and from the intercooler 5 to the intake connecting pipe 9, the intercooler 5
The intake passage on the engine side and the intercooler 5 are connected by an intake pipe 8 made of an elastic member.

The operation of the configuration of the above embodiment will be explained. Intake port 12
The air taken in is supercharged by the supercharger 4, passes through the intake pipe 8, intake connection pipe 9, and intake pipe 10, enters the intercooler 5 from the inlet pipe 15, is cooled here, and is then sent to the outlet. The pipe passes through the other intake pipe, the intake connecting pipe (none of which is shown), the other intake pipe 8, and the intake pipe member 11, and further through the throttle chamber 6,
It is supplied to the engine 1 from the intake manifold 2 via the surge tank 7 .

When the engine is under low load, engine vibration is generally large, but since it is not supercharging, the intake pipe 8
The bellows tube section 8a is not expanded, and there is a gap between the bellows tube section 8a and the guide member 13, and since the bellows tube section 8a only needs to be formed with a thin wall, it is possible to connect the bellows tube section 8a through the intake pipe 8 on the engine side. The vibrations transmitted to the intake pipe 9 are effectively absorbed by the bellows tube portion 8a, and the vibrations transmitted to the intake connecting pipe 9 are greatly reduced. Moreover, in this embodiment, since the protruding piece 8c is provided on the outer surface of the bellows tube part 8a, this serves as a buffer material and can prevent the occurrence of vibration noise due to contact between the intake pipe 8 and the guide member 13.

Next, when the engine is under high load, particularly during supercharging, the bellows tube section 8a tends to expand due to the supercharging pressure, but the expansion is suppressed by the guide member 13 at its outer circumference. Moreover, during this operation, the vibration of the engine is smaller than when the load is low, so even if the bellows tube section 8a expands slightly and the space between the bellows tube section 8a and the guide member 13 becomes narrower, There are no particular problems.

In this way, the intake pipe 8 is provided with the bellows tube section 8a, and the guide member 13 is provided on the outer peripheral surface of the bellows tube section 8a.
The expansion of the bellows tube part 8 is suppressed from the outside.
The wall thickness of a can be made extremely thin, and therefore a remarkable effect of preventing the transmission of engine vibrations can be obtained. Further, unlike the conventional case, the bellows tube portion 8a is not damaged due to expansion or the sealing performance is deteriorated.

Note that, if at least one of the two intake pipes 8 has the bellows pipe portion 8a, the above effects can be obtained to some extent. Further, in the above embodiment, the intake pipe 10 and the intake connecting pipe 9 are used as the side of the intercooler 5 fixed to the vehicle body 16. A let pipe (not shown) is extended to
The tip of the intake pipe 8 may be connected to these. Further, although a turbo type supercharger 4 is shown in the above embodiment, it may be a mechanical type.

(Effects of the invention) As described above, according to the invention, the intercooler and the intake passage on the engine side are connected by the bellows pipe section formed of an elastic member, and the guide member guides the bellows pipe section from the outside. By providing this, even if the wall thickness of the bellows tube is made thinner, expansion due to supercharging pressure can be suppressed, thereby preventing engine vibrations from being transmitted to the intercooler and vehicle body. . In addition, during supercharging, the expansion of the bellows tube is suppressed by the guide member, so it is possible to prevent the sealing performance of the connection part of the bellows tube from deteriorating.Furthermore, when not supercharging, there is a gap on the outer peripheral surface of the bellows tube. Since the guide member is located at the center of the engine, and this guide member is only fixed to one of the intake passages, engine vibrations are prevented from being transmitted to the intercooler or the vehicle body via the guide member. be able to.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of an intake system for an automobile engine according to an embodiment of the present invention, Fig. 2 is a sectional view of essential parts of the same device, and Fig. 3 is an enlarged sectional view of the section taken in the direction of arrow A in Fig. 2. It is. DESCRIPTION OF SYMBOLS 1... Engine, 4... Supercharger, 5... Intercooler, 8... Intake pipe, 8a... Bellows pipe section, 9... Intake connecting pipe, 13... Guide member, 1
6...Car body.

Claims (1)

[Scope of utility model registration request] Intake air of an automobile engine in which a supercharger is interposed in the intake passage that supplies intake air to the engine, an intercooler is interposed in the intake passage downstream of the supercharger, and the intercooler is fixed to the vehicle body. In the device, the intake passages on the intercooler side and the engine side are connected by an intake pipe having a bellows pipe section formed of an elastic member, and a guide member that guides the bellows pipe section from its outer peripheral surface is connected during non-supercharging. An intake device for an automobile engine, characterized in that the guide member is arranged to have a predetermined distance from the outer circumferential surface, and the guide member is fixed to the intake passage on one of the sides.