JPH09100754A - Inertia air intake device in fuel injection type internal combustion engine for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly reduce bending deformation of each of air intake pipes at the time of collision by arranging a metallic pipe made cooling water outlet piping to introduce cooling water from a cooling water outlet to a radiator so that it is extended along one longitudinal side surface of an internal combustion engine and fixing an intermediate part of the air intake pipes on this cooling water outlet piping. SOLUTION: A cooling water outlet piping 15 made into a metallic pipe is arranged on a portion on the lower side of each of air intake pipes 8 of an air intake device 5 so as to extend along one longitudinal side surface 1a in an internal combustion engine 1. An intermediate part of each of the air intake pipes 8 of the air intake device 5 is fixed by welding or brazing or by bolt fastening or belt tightening free to connect and disconnect to/from this cooling water outlet piping 15. In this constitution, it is possible to integrally connect the air intake pipes on the air suction device 5 to each other through the cooling water outlet piping 15 made of the metallic pipe and to certainly reduce bending occurred on each of the air intake pipes 8 in the case when impulse of a collisional accident of a vehicle reaches one or both of each of the air intake pipes 8 as wall as a chamber 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inertial intake system applied to a fuel injection type internal combustion engine mounted on a vehicle.

[0002]

2. Description of the Related Art Generally, as is well known in the prior art, an inertial intake system has a chamber for introducing intake air from an air cleaner so that a chamber extending laterally of an internal combustion engine in the cylinder row direction. By disposing this chamber and the intake port of each cylinder, it is configured such that each cylinder is connected by an intake pipe of a relatively long length that is independent for each cylinder. In the case of applying to a fuel injection type internal combustion engine, for example, as described in Japanese Utility Model Publication No. 5-28378, a boss attached to the upper surface of a portion of each of the intake pipes near the connection portion to the internal combustion engine. A configuration is adopted in which a fuel injection valve for each cylinder is inserted and attached to each of the mounting boss portions.

[0003]

However, with such a structure, when a collision accident of a vehicle occurs and the chamber in the intake device is displaced relative to the internal combustion engine, this displacement occurs. When the intake pipe bends due to displacement, and this bending deformation extends to the mounting boss of the fuel injection valve, the seal at the mounting part of the fuel injection valve to the mounting boss is damaged or severe. Causes a problem that the fuel injection valve comes off from the mounting boss portion, and this problem is particularly increased when each intake pipe in the inertial intake device is made of a metal pipe. Of.

In this case, in order to prevent the chamber in the intake device from being displaced relative to the internal combustion engine in the event of a vehicle collision, this chamber is mounted to the internal combustion engine via a bracket member. Although it may be configured to be fixed, even if the chamber is fixed to the internal combustion engine by the bracket member, the impact directly affects each intake pipe in the event of a vehicle collision accident. Since it is not possible to prevent the bending deformation of each intake pipe that occurs due to this, the same problem as described above is brought about.

According to the present invention, each intake pipe in the inertial intake system is bent and deformed in the event of a vehicle collision.
A technical problem is to reliably reduce the number of parts without increasing the number of parts.

[0006]

The present invention can be applied to an internal combustion engine mounted on a vehicle, for example, in Japanese Utility Model Publication No. 6-14030.
As described in the publication, etc., a cooling water outlet pipe made of a metal pipe for guiding cooling water from a cooling water outlet in an internal combustion engine to a radiator is provided on one longitudinal side of the internal combustion engine in the direction of the cylinder row. Paying attention to the fact that they are arranged so as to extend along, the present invention has been completed by utilizing this fact.

That is, according to the present invention, "a chamber arranged at a portion of one longitudinal side surface of an internal combustion engine mounted on a vehicle, and this chamber and an intake port of each cylinder opening on one longitudinal side surface of the internal combustion engine. And an intake pipe for connecting each of the cylinders independently for each cylinder, wherein an attachment boss of the fuel injection valve is provided at a portion of each intake pipe near a connection to the intake port. A cooling water outlet pipe made of a metal pipe for guiding cooling water from a cooling water outlet in the internal combustion engine to a radiator is arranged at a position below each of the intake pipes so as to extend along the one longitudinal side surface. And the middle part of the intake pipe is fixed to this cooling water outlet pipe. "

[0008]

As described above, by fixing the middle part of each intake pipe in the inertial intake device to the cooling water outlet pipe made of a metal pipe arranged below the intake pipe, the mutual intake of the intake pipes is improved. Since the spaces can be integrally connected via the cooling water outlet pipe made of the metal pipe, in the case where the impact at the time of a vehicle collision accident affects one or both of the chamber and each intake pipe, The bending deformation occurring in each intake pipe can be reliably reduced by using the cooling water outlet pipe made of the metal pipe without adding other parts.

Therefore, according to the present invention, in the event of a vehicle collision, the seal in the mounting portion of each fuel injection valve is damaged or each fuel injection valve comes off, resulting in an increase in the number of parts and weight. It has an effect that can be surely reduced.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings of FIGS. In this figure, reference numeral 1 is an engine room 3 provided in a vehicle body frame 2 of the vehicle.
The internal combustion engine mounted on the vehicle is shown in FIG.

Reference numeral 5 denotes an inertial intake system provided at a portion of one longitudinal side surface 1a of the internal combustion engine 1. The intake system 5 includes a chamber 6 extending along the one longitudinal side surface 1a. , An intake pipe 8 that connects independently to the intake port 7 of each cylinder that opens to the one longitudinal side face 1a, and an air cleaner (not shown) is provided at one end of the chamber 6. A throttle body 9 having a throttle valve for intake air from is installed.

Further, a mounting boss 8b is provided on the upper surface of each intake pipe 8 near the connecting flange 8a for the internal combustion engine 1, and each cylinder is attached to each mounting boss 8b. The fuel injection valve 10 is attached by plugging in. Reference numeral 11 is a fuel delivery pipe for distributing fuel to each of the fuel injection valves 10.

On the other hand, on the front side surface 1b of the internal combustion engine 1,
A cooling water pump 12 is attached, and this cooling water pump 12
The cooling water return pipe 13 from the radiator 4 is connected to the intake side of the radiator 4, while the cooling water outlet 14 is provided on the rear side surface 1c of the internal combustion engine 1, and the cooling water outlet 14 is connected to the radiator. 4 is connected to the cooling water outlet pipe 15.

The cooling water outlet pipe 15 is made of a metal pipe, and the cooling water outlet pipe 15 is provided at a position below each intake pipe 8 in the intake device 5 on one longitudinal side surface of the internal combustion engine 1. 1a is provided so as to extend, and the intake device 5 is connected to the cooling water outlet pipe 15.
The middle part of each intake pipe 8 is fixed by welding or brazing, or is detachably fixed by bolt fastening or belt fastening.

With this structure, the intake pipes 8 of the intake device 5 can be integrally connected to each other through the cooling water outlet pipe 15 made of a metal pipe, so that a vehicle collision occurs. The bending deformation generated in each intake pipe 8 when the impact at the time of the accident affects one or both of the chamber 6 and each intake pipe 8 is made by using the cooling water outlet pipe 15 made of the metal pipe. It can be surely made small.

By supporting the cooling water outlet pipe 15 made of a metal pipe with respect to the internal combustion engine 1 via a bracket member 16 as shown in the drawing, each intake pipe 8 generated in the event of a vehicle collision accident. It goes without saying that the bending deformation of the can be further reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

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

[Explanation of symbols]

1 Internal Combustion Engine 1a One Long Side of Internal Combustion Engine 2 Body Frame 3 Engine Room 4 Radiator 5 Intake Device 6 Chamber 7 Intake Port 8 Intake Pipe 8b Mounting Boss 10 Fuel Injection Valve 14 Cooling Water Outlet 15 Cooling Water Outlet Pipe

Claims (1)

[Claims] 1. A cylinder disposed between one longitudinal side surface of an internal combustion engine mounted on a vehicle and an intake port of each cylinder opened on the one longitudinal side surface of the internal combustion engine. And an intake pipe independently connected to each of the intake pipes, and an intake boss portion for mounting a fuel injection valve is provided at a portion of each of the intake pipes near a connection portion to the intake port, A cooling water outlet pipe made of a metal pipe for guiding the cooling water from the cooling water outlet in the internal combustion engine to the radiator at a portion below the cooling water outlet pipe so as to extend along the one longitudinal side surface. An inertial intake device for a fuel injection internal combustion engine for a vehicle, wherein a middle portion of the intake pipe is fixed to a water outlet pipe.