JPH077574Y2 - Intake manifold mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an intake manifold mounting structure that can be suitably used in an engine that uses a cylinder head that is commonly used for engine accessories.

[Prior Art] In some automobile engines, mounting holes for engine accessories are provided on a side surface of a cylinder head to which an intake manifold or the like is connected, and the mounting holes are selectively used. For example, a mechanical fuel pump or engine accessories such as an exhaust gas recirculation control valve may be selectively attached to the attachment hole. When these engine accessories are not used, for example, when an electromagnetic pump or the like is used instead of the mechanical fuel pump, the mounting hole is closed with a blind plug.

On the other hand, in the intake manifold in which a surge tank having a relatively large capacity is integrally formed at the upper end portion, the mounting flange and the like are often formed to have a particularly thick wall. Further, as a prior art of the present invention, for example, Japanese Utility Model Laid-Open No. 61-184858
As disclosed in Japanese Patent Laid-Open Publication No. JP-A-2003-264, there is a structure in which a reinforcing rib is formed from the surge tank to the intake manifold to increase the overall strength.

[Problems to be Solved by the Invention] However, even when the mounting hole is formed in the vicinity of the mounting flange of the intake manifold, the blind plug is used only for closing the mounting hole. Therefore, the intake manifold and the blind plug have to be formed separately, which causes an increase in labor.

Further, there are relatively many examples of the intake manifold having an upper end integrally formed with a surge tank, which is formed in an L shape in a side view. However, it is difficult to secure sufficient strength against the load from the surge tank side only by providing the intake manifold with the reinforcing ribs.
Moreover, in the conventional one, since the mounting flange has a large thickness to increase the strength against the load from above and the surface pressure, it is difficult to sufficiently increase the strength of the entire intake manifold.

The present invention aims to eliminate such a problem.

[Means for Solving the Problem] In order to achieve the above-mentioned object, the present invention provides a cylinder head with a mounting hole for an engine auxiliary device on a side surface thereof, and when the mounting hole is selectively used, the cylinder is A blind plug for the mounting hole is integrally formed on a mounting flange of the intake manifold fixed to the side surface of the head, and a mounting seat is provided on the blind plug, and the mounting seat and the upper end portion of the intake manifold or a surge tank are installed. It is characterized by being connected through.

[Operation] With this configuration, since the blind plug that closes the mounting hole and the mounting flange of the intake manifold are integrated, it is possible to save work time during manufacturing, and to reduce the joint area and tightening of the entire mounting flange. The number of places can be increased comfortably.

Further, the stay connecting the mounting seat provided in the blind plug and the upper end of the intake manifold or the surge tank can increase the strength of the entire intake manifold and the surface pressure of the mounting flange.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

An intake manifold 1 shown in the drawing is formed by integrally forming a surge tank 2 on an upper end portion 1a, and is used for an engine 3 of an automobile. This engine 3
It is placed sideways in the engine compartment 4. The intake manifold 1 is fixed to the side surface 5a of the cylinder head 5 on the passenger compartment side R.

On the side surface 5a of the cylinder head 5, a plurality of ports 6 communicating with each cylinder are opened. And engine room 4
Brake booster 7 side port 6 located in the corner of
A mounting hole 8 is provided in the vicinity of, and the mounting hole 8 is selectively used according to engine accessories such as a fuel pump and an exhaust gas recirculation control valve. For example, when natural suction is adopted, a mechanical fuel pump is attached to the mounting hole 8 and the fuel pump is driven by one end of the camshaft. On the other hand, when the electromagnetic pump is used and other engine accessories are not attached to the mounting hole 8, the mounting hole 8 is closed.

The intake manifold 1 is formed in an L shape in a side view, an intermediate portion thereof is integrally provided with a fastening portion 9 of a delivery pipe arranged in the cylinder row direction, and a side end portion thereof is provided with a mounting flange 10 for the cylinder head 5. Are integrally formed. An end of a branch passage 11 for communicating the inside of the surge tank 2 with each port 6 of the cylinder head 5 is opened at the joint surface 10a of the mounting flange 10. A plurality of through holes 12 for tightening bolts are formed in the peripheral portion of the mounting flange 10 at positions surrounding the open ends of the branch passages 11 and the like from substantially three sides.

Further, a blind plug 13 for closing the mounting hole 8 is integrally formed at the end of the mounting flange 10 and a mounting seat 14 is provided near the center thereof. The mounting seat 14 and the mounting seat 15 provided on the upper end portion 1a of the intake manifold 1 are connected via a stay 16. The stay 16 is formed of a metal tube provided with flat joints 16a at both ends,
An insertion hole 17 is formed in each joint 16a, and one of them is formed as an elongated hole. Then, the washers 18, 15 are attached to the mounting seats 14, 15.
The intake manifold 1 is fastened by bolts 20 and 21 which are screwed via 19, and the upper end portion 1a and the side end portion of the intake manifold 1 are connected to each other in an oblique posture.

According to this structure, since the mounting flange 10 of the intake manifold 1 and the blind plug 13 of the mounting hole 8 are integrated, the joint area and the tightening location of the entire mounting flange 10 can be reasonably increased. Therefore, the intake manifold 1 can be more reliably joined to the side surface 5a of the cylinder head 5.

Further, since the mounting seat 14 provided on the blind plug 13 and the upper end portion 1a of the intake manifold 1 are obliquely connected via the stay 16, the strength of the intake manifold 1 as a whole can be increased and the surge tank 2 side Since it is supported on the cylinder head 5 side, the load applied from above to the mounting flange 10 side can be reduced.

Therefore, according to the above configuration, the mounting flange
Since the blind plug 10 of the mounting hole 8 and the mounting plug 10 are integrally formed, the labor required for manufacturing can be simplified.

Moreover, in addition to increasing the joint area of the mounting flange 10 and the tightening location, the stay 16 connecting the upper end 1a of the intake manifold 1 and the blind plug 13 enhances the strength of the mounting flange 10 and the intake manifold 1 as a whole. As a result, it is possible to increase the surface pressure of the mounting flange 10 while reducing the wall thickness of the mounting flange 10 to improve the sealing performance between the intake manifold 1 and the cylinder head 5.

Also, on the side where the brake booster 7 and the like are arranged, the upper end 1a of the intake manifold 1 and the blind plug 13 are connected to the stay 16
If connected by, there are the following advantages. That is, the brake booster 7, etc., the delivery pipe of the fuel supply system, the fuel injection valve, etc. are arranged relatively close to each other. Therefore, when the stay 16 is arranged in the position and form as described above, the stay 16 can prevent the fuel supply system from being easily damaged by the brake booster 7 or the like when the vehicle collides.

The stay may connect the blind plug and the surge tank. Further, the stays and the like are not limited to the shapes shown in the drawings.

[Effect of the Invention] In the present invention, the blind plug that closes the mounting holes of the engine accessories is effectively used, and the mounting seat provided on the blind plug and the upper end of the intake manifold or the surge tank are connected by the stay. Since the surface pressure of the mounting flange and the strength of the entire intake manifold can be reliably increased, it is possible to provide an intake manifold mounting structure having excellent sealing performance and safety.

[Brief description of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view and a second view.
Figure is a plan view of the engine room. Figure 3 is a right side view.
The drawing is a plan view of a partial cross section, and FIG. 5 is a view indicated by an arrow A in FIG. 1 …… Intake manifold 1a …… Upper end 2 …… Surge tank 5 …… Cylinder head 5a …… Side of cylinder head 7 …… Brake booster 8 …… Mounting hole 10 …… Mounting flange 13 …… Blind plug 14 …… Mounting seat 16 ... Stay

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Claims (1)

[Scope of utility model registration request] 1. When a mounting hole for engine accessories is provided on a side surface of a cylinder head and the mounting hole is selectively used, a mounting flange of an intake manifold fixed to the side surface of the cylinder head is provided with the mounting hole. An intake manifold mounting structure, characterized in that the blind plug is integrally formed, a mounting seat is provided on the blind plug, and the mounting seat is connected to the upper end of the intake manifold or a surge tank via a stay.