JPH0710458U - Intake manifold support device for internal combustion engine - Google Patents

Abstract

(57) [Summary] [Purpose] Each intake pipe line 4 joined to one side surface of the internal combustion engine 1 by the connecting flange portion 3 is curved in an L shape in a side view,
The upper end of the stay member 10 is connected to the chamber 5 while the stay member 10 is bolted at both ends between the upper end of one of the intake pipes or the chamber and the connecting flange portion. In the support device for the intake manifold, which is mounted in the shape of a cylinder, damage to the bolt fastening portion at the upper end of the stay member is prevented without increasing the number of parts and the number of mounting steps. [Structure] The stay member 10 is integrally provided with a contact piece 13 adapted to contact at least a side surface on the internal combustion engine side of the left and right side surfaces of the chamber 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an intake manifold of a type in which each cylinder in an internal combustion engine is subjected to inertial supercharging, and a support device for the intake manifold.

[0002]

[Prior art]

 An intake manifold for this type of inertial supercharging has a chamber arranged so as to extend in the direction of the cylinder row in the internal combustion engine, and an intake port in each cylinder via an independent intake pipe line for each cylinder. While connected, a throttle body is attached to one end of the chamber, but in this type of intake manifold, each intake pipe line is made considerably long in order to achieve inertia supercharging. In addition to this, since the throttle body is considerably heavy, the vibration of the chamber becomes large, which may cause damage such as cracks in the intake pipe.

Therefore, Japanese Utility Model Laid-Open No. 1-99965 discloses a chamber in which each intake pipe line in an intake manifold is curved in an L shape in a side view of an internal combustion engine, and a throttle body is provided at an upper end thereof. On the other hand, between the upper end or the chamber of one of the intake pipelines and the flange portion for connecting the intake pipeline to the internal combustion engine, the stay member is fastened to both ends with bolts. It is proposed to suppress the vibration in the chamber with the throttle body by mounting the inclining shape.

[0004]

[Problems to be solved by the device]

 However, in addition to the fact that a relatively large external force for suppressing the vibration of the chamber acts repeatedly on the upper end of the intake pipe of the stay member or the fastening portion by the bolt to the chamber, the collision accident of the vehicle occurs. As a result, a large impact force will be applied to the bolts, and the bolts for screwing in the bolts will often be damaged.If the bolts are loosely tightened, the vibration of the chamber will occur immediately. There was a problem of rapid increase.

The present invention has a technical object to surely prevent this problem without increasing the number of parts and the number of mounting steps.

[0006]

[Means for Solving the Problems]

 In order to achieve this technical problem, the present invention is directed to an intake pipe that is joined to one side surface of an internal combustion engine with a connecting flange portion and is curved in an L shape in a side view, and the upper end thereof is a cylinder of the internal combustion engine. While being connected to the chambers extending in the row direction, a stay member having bolts fastened at both ends to the upper end of at least one of the intake pipes or the chamber and the connecting flange is provided. In the support device for the intake manifold, which is mounted in an inclined shape, the stay member is integrally provided with an abutment piece adapted to abut at least one of the left and right side surfaces of the chamber on the internal combustion engine side. It is configured to be provided.

[0007]

[Work]

 With this configuration, the lateral external force that acts on the upper end of the intake pipe of the stay member or the fastening portion of the bolt to the chamber and the lateral force that acts on the chamber toward the internal combustion engine side. Since the impact force can be shared by both the bolt and the contact piece that contacts the chamber, it is possible to ensure that the bolt or the screwing boss of the bolt is not damaged. It can be reduced.

Moreover, since the contact piece provided on the stay member is in contact with the chamber, it is ensured that the vibration of the chamber rapidly increases even if the bolt is loosened. It can be prevented. In addition, when the stay member is attached, the abutment piece provided integrally with the stay member only has to abut against the chamber, resulting in an increase in the number of parts and an increase in the number of attachment steps. There is no.

[0009]

[Effect of device]

 Therefore, according to the present invention, when the inclined stay member is mounted to reduce the vibration of the chamber in the inertial supercharged intake manifold, the bolt fastening portion at the upper end of the stay member is damaged. It is possible to reliably prevent this from occurring without increasing the number of parts and the number of mounting steps, and it is possible to reliably prevent a sudden increase in vibration of the chamber due to loosening of the bolt.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings of FIGS. In the figure, reference numeral 1 indicates a multi-cylinder internal combustion engine, and reference numeral 2 indicates an intake supercharged intake manifold for the internal combustion engine 1. The intake manifold 2 is one longitudinal side of the internal combustion engine 1. On the other hand, from the plurality of intake pipe lines 4 joined by the connecting flange portion 3 so as to communicate with each of the intake ports to each cylinder, and the chamber 5 extending in the cylinder row direction in the internal combustion engine 1. The intake pipe lines 4 are curved in an L shape in a side view, and the upper ends thereof are integrally connected to the lower surface of the chamber 5. A throttle body 6 is joined to one end of the chamber 5, and an intake passage 7 from an air cleaner (not shown) is connected to the throttle body 6.

Boss portions 8 and 9 are integrally formed on the upper surface of the connecting flange portion 3 and the side surface at the upper end of the intake pipe passage 4 located outside of the intake pipe passages 4, respectively. A stay member 10 having a substantially L-shaped cross section is mounted between the two boss portions 8 and 9 in an inclined shape, and both ends of the stay member 10 are respectively attached to the both boss portions 8 and 9. , Bolts 11 and 12.

Then, a contact piece 13 is integrally formed on the upper end of the stay member 10, and the contact piece 13 is formed on the inner side surface of the left and right side surfaces of the chamber 5 on the internal combustion engine 1 side. It is configured so as to contact with. With this configuration, a lateral external force that acts on the fastening portion of the stay member 10 to the upper end of the intake pipe line 4 by the bolt 12 and a force that acts on the chamber 5 in a direction that pushes the chamber 5 toward the internal combustion engine 1 side. Since the impact force can be divided and shared by both the bolt 12 and the contact piece 13 that contacts the chamber 5, damage to the bolt 12 or the screwing boss portion 9 of the bolt 12 is prevented. It is possible to reliably reduce the occurrence.

In addition, the upper end of the stay member 10 may be configured to be fastened to the chamber 5 with a bolt, and the stay member 10 may include right and left side surfaces in the chamber 5. Of these, both the abutment piece that abuts the inner surface on the internal combustion engine 1 side and the abutment piece that abuts the outer surface on the opposite side of the internal combustion engine 1 of the left and right side surfaces of the chamber 5. May be provided.

[Brief description of drawings]

FIG. 1 is a plan view of an internal combustion engine according to an embodiment of the present invention.

FIG. 2 is an enlarged side view taken along line II-II of FIG.

FIG. 3 is a plan view taken along the line III-III in FIG.

[Explanation of symbols]

 1 Internal Combustion Engine 2 Intake Manifold 3 Connection Flange 4 Intake Pipeline 5 Chamber 6 Throttle Body 8, 9 Boss 10 Stay Member 11, 12 Bolt 13 Contact Piece

Claims (1)

[Scope of utility model registration request] 1. An intake pipe line joined to one side surface of an internal combustion engine by a connecting flange portion is curved in an L shape in a side view, and its upper end is formed into a chamber extending in the direction of a cylinder row in the internal combustion engine. On the other hand, while connecting, at least one of the intake pipes is provided with an upper end or a chamber of the intake pipe and the connecting flange portion, and a stay member having both ends bolted thereto is mounted obliquely. In an intake manifold support device, the stay member is integrally provided with an abutment piece that abuts at least a side surface on the internal combustion engine side of the left and right side surfaces of the chamber. Intake manifold support device.