JPH0422057Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] The invention consists of four cylinders arranged in a row,
An intercooler is installed at one end of the cylinder row.
In addition, the intake manifolds of the cylinders are arranged on one side, and the intermediate portions of the four pipes capable of inertial supercharging that connect the intake manifolds to the intercooler are arranged so that the respective pipes substantially follow a horizontal plane. The present invention relates to an air supply device for an internal combustion engine that is arranged above the cylinder in a bent state.

[Prior art]

Conventionally, as shown in FIGS. 4 to 6, intermediate portions 6a to 9a of four pipes extending between the intercooler 3 and the intake manifolds 5a to 5b are
1 above and below the 4 cylinders 1a to 1d
They were arranged in four rows of tiers, and were bent at three locations so as to almost follow the horizontal plane.

That is, the cooling fan 4 for the internal combustion engine cooling radiator 2 is used to cool the air to the cylinders 1a to 1d by the intercooler 3, and the length l ₁ , width l ₂ and height l ₃ are limited. Despite its compact layout, the pipeline was designed to be long, and the overall aim was to improve the inertial supercharging effect at low speeds.

[Problem that the invention attempts to solve]

However, since the intermediate portions 6a to 9a of the pipe are arranged in four rows per stage and bent at three places, the radius of curvature of each bend is limited due to spatial constraints.
r ₁ , r ₂ , r ₃ become considerably small, and the middle part of the pipe 6
Due to the increased resistance due to the sharp bends in the pipes a to 9a, the inertial supercharging effect at low speeds did not improve as intended despite the length of the pipe line. Moreover,
Since there are three bending points where the inside is short and the outside is long, the lengths of the midway portions 6a to 9a of the pipes are considerably different from each other, which results in a large dimensional difference in the entire pipe, and each cylinder 1a to 1d is Since the synchronized rotational speed for inertial supercharging is different, the inertial supercharging effect becomes even more insufficient.

The purpose of this invention is to simply improve the arrangement of the midway portions of the pipes, to make all four midway pipes have gentle bends and to have small differences in length, and to provide inertial supercharging at low speeds. The point is to be able to sufficiently improve the effectiveness.

[Means to solve the problem]

The characteristic configuration of the present invention is that among the four pipes capable of inertial supercharging that extend between the intercooler and the intake manifold, the middle part bent so as to almost follow the horizontal plane above the cylinder is arranged in two stages, upper and lower, and Each stage is arranged in two horizontal rows of tube bundles, and the bending points of the tube bundles are bent so that the number of bending points in the forward direction and the reverse direction are the same.The effect is as follows. It is as follows.

[Effect]

In other words, by arranging the middle portion of the four pipes in two stages and arranging them in a bundle of pipes with two pipes in each stage, there is more space than the conventional case of lining up four pipes in one stage. As a result, the installation space is compact, and although the pipe is long, the bend in the middle of the pipe can be made gentler, and the resistance caused by the bend in the middle of the pipe can be sufficiently reduced to improve the inertial supercharging effect at low speeds. can be sufficiently improved.

In addition, the bends in the pipe bundle in the middle of the pipe are formed so that the number of bends in the forward and reverse directions is the same, for example, twice to the right and twice to the left. Therefore, the number of times the pipes are located on the inside of the bend is the same as the number of times they are located on the outside of the bend, and as a result, it is easy to make the lengths of all midway portions of the pipes the same or almost the same length, and as a result, the length of the pipes is The difference in overall length can be eliminated or minimized, and the synchronized rotational speed for inertial supercharging in all cylinders can be made almost the same, making it possible to achieve a sufficient increase in output due to inertial supercharging. .

[Effect of idea]

As a result, even with a simple modification of simply changing the arrangement and bending state of the middle section of the pipe, it is possible to reduce the resistance of long pipes and make them of equal length, while maintaining the characteristics that allow for compact arrangement. It has become possible to sufficiently improve low-speed performance through the cooperation of cooling and inertial supercharging.

〔Example〕

Next, an embodiment will be shown with reference to FIGS. 1 to 3.

Four cylinders 1a, 1b, 1c, and 1d are arranged in a row, and a radiator 2 for cooling an internal combustion engine E, an intercooler 3 for cooling combustion air, and a radiator 2 are installed at one end of the cylinder row. A fan 4 is provided to supply cooling air to the intercooler 3.

Intake manifolds 5a, 5b, 5c, 5 for the cylinders 1a to 1d are arranged on one side of the cylinder row 1.
d, and the cooled air inlet 3a of the intercooler 3 is connected to the intake manifold 5a with respect to the cylinder row.
The cooling air outlet 3b of the intercooler 3 is arranged on the side opposite to the intake manifolds 5a to 5b with respect to the cylinder row 1, and the intake manifolds 5a to 5d are connected to the intercooler by separate pipes. It is connected to the cooling air outlet 3b of No.3.

Midway portions of the above pipeline 6a, 7a, 8a, 9a
The cylinders 1a to 1 are arranged in two rows of tube bundles in two rows, one above the other, and each one is bent at two points along a horizontal plane.
d, and intermediate portions 6a to 9a of the pipe.
are arranged so that one bending point is on the inside of the bend and the other bending point is on the outside of the bend, and the intermediate portions 6a to 9a of the pipe between the connecting flanges 10a and 10b are covered with a cover 11 to extend the length. l ₁ , width l ₂ ,
Although it is located in a compact space with a limited height l ₃ , it is sufficiently long and approximately equal in length, and has radii of curvature R ₁ and R ₂ so that sufficient inertial supercharging effect can be obtained at low speeds. is formed to be sufficiently large.

Pipe end portions 6b and 7 that connect the pipe midway portions 6a to 9a and the intake manifolds 5a to 5d.
b, 8b, 9b in two stages, upper and lower on the entrance side, and two in each stage.
They are arranged in rows, bent in the middle, and further arranged in a row in the direction along the cylinder row on the outlet side, and the lengths of the pipe end portions 6b to 9b are shorter as the outlet side is closer to the intercooler 3. It is set as follows. Further, the intake manifolds 5a to 5d are bent so as to be farther away from the intercooler 3 toward the upper side, and the lengths of the intake manifolds 5a to 5d are set such that the closer to the intercooler 3 the longer the intake manifolds are.

In order to connect the pipe end portions 6b to 9b and the intake manifolds 5a to 5d, one long part is connected to the other short part so that the overall lengths are approximately equal to each other, and the entire length is connected to the intake manifold 5a to 5d. The length is increased by 5 to 5 d of bending to further improve the inertial supercharging effect at low speeds.

In short, while the internal combustion engine E, the intercooler 3, and the pipes connecting them are arranged compactly, high output is achieved at low speeds by the cooperation of air cooling by the intercooler 3 and inertial supercharging by the pipes. It's made so that you can get it.

[Another example]

Next, another embodiment will be described.

The shape, arrangement, dimensions, etc. of the pipe end portions 6b to 9b that connect the pipe midway portions 6a to 9a arranged in two rows of upper and lower rows to the intercooler 3 and intake manifolds 5a to 5d may vary depending on the situation. It is possible to make changes as appropriate.

The arrangement of the inlet 3a and outlet 3b of the intercooler 3 can be changed as appropriate, such as by reversing the arrangement of the above-mentioned embodiment. It may be connected to 3a.

The midway portions 6a to 9a of the conduit may be bent, for example, at 4 locations, 2 locations toward the left and 2 locations toward the right; in other words, the number of locations bent in the forward direction and in the reverse direction is the same. It would be good if it was bent like this.

[Brief explanation of the drawing]

1 to 3 are schematic diagrams showing an embodiment of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a front view,
FIG. 3 is a side view. 4 to 6 are schematic diagrams of the conventional example, in which FIG. 4 is a plan view, FIG. 5 is a front view, and FIG. 6 is a side view. 1a, 1b, 1c, 1d... cylinder, 3...
Intercooler, 5a, 5b, 5c, 5d...Intake manifold, 6a, 7a, 8a, 9a...Midway portion of pipe.

Claims (1)

[Scope of utility model registration request] Four cylinders 1a, 1b, 1c, 1d are arranged side by side in a row, with an intercooler 3 at one end of the cylinder row, and an intake manifold 5a for the cylinders 1a, 1b, 1c, 1d at one lateral side. ，
5b, 5c, 5d are arranged respectively, and the intake manifolds 5a, 5b, 5c,
The middle portions 6a, 7a, 8a, 9a of the four inertial supercharging pipes connecting the cylinders 5d are bent so as to substantially follow the horizontal plane, and are placed above the cylinders 1a, 1b, 1c, 1d. This is an air supply system for an internal combustion engine disposed in the middle part of the pipe 6a,
7a, 8a, and 9a are arranged in a tube bundle with two rows of upper and lower rows and two rows of rows in each row, and the number of bends in the tube bundle is the same in the forward direction and in the reverse direction. Air supply system for an internal combustion engine with a bent configuration.