JPH0545812Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an air supply system for a horizontally mounted V-type engine.

(Prior art) In an automobile equipped with a V-type engine, in order to effectively utilize the space in the engine room, an air supply port is provided on the opposite side of the bank, and a surge tank is placed above the valley of the bank. It has been known.

(Problem that the invention aims to solve) When the air supply system is placed above the bank valley of the engine, the distance between the branch length, the so-called valve, and the surge tank becomes short, which reduces the torque in the medium and low speed range. In particular, there is a problem in that it is difficult to improve low-speed torque. Another problem is that when a surge tank is placed directly above the engine, the overall height of the engine increases, making it impossible to lower the bonnet line.

(Means for Solving the Problems) The purpose of the present invention is to provide an air supply system for a transversely mounted V-type engine that can have a sufficient branch length and a low bonnet line. The air supply system consists of a surge tank located above the rear, and an air supply manifold that is disposed across the top of the bank located on the cabin side and communicates each of the air supply ports with the surge tank. One end of the air manifold is connected in line to the side of the surge tank.

(Effect) A surge tank is arranged above the rear of the bank located on the cabin side, and the tank and the air supply port are communicated with an air supply manifold that crosses above the bank to make the branch length sufficiently long. Therefore, it is effective in improving medium and low speed torque. Additionally, by placing the surge tank above the rear of the bank and connecting one end of the air supply manifold to the side of the surge tank in a row, the height of the surge tank is lowered, making it possible to keep the bonnet line low. This also has the effect of expanding the degree of freedom in designing the style of the car.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

In FIG. 1, reference numeral 1 indicates an engine, and reference numeral 2 indicates a bonnet. engine 1
The rear bank 3 on the cabin side is located on the right side in the figure, and the front bank 4 is located on the left side in the figure.
This is a horizontally mounted V-type six-cylinder engine. The front bank 4 includes first, third, and fifth cylinders, and the rear bank 3 includes second, fourth, and sixth cylinders.

Opposite side 4 of front bank 4 and rear bank 3
a, 3a, an air supply port is provided for each cylinder (not shown), and this air supply port is connected to a surge tank 6 by an air supply manifold 5. The air supply manifold 5 is integrally molded with the surge tank 6 and extends in a substantially horizontal direction, and has a horizontal portion 50 whose tip 5a is bent downward, and a connection connecting the tip 5a and the air supply port. Part 5
It consists of 1,52. The horizontal part and the connecting part are provided for each air supply port of each cylinder, and the connecting part 51 is provided at the air supply port of the first cylinder.
The connecting portions 52 each communicate with the air supply ports of the second cylinders. The horizontal portion 50 crosses the rear bank 3 above the rear bank 3 and communicates with a surge tank 6 disposed above the rear part of the rear bank 3.

As shown in FIG. 2, the surge tank 6 has a partition wall 6a with a round corrugated cross section, which separates the upper and lower spaces 6.
A and 6B, and one end of each air supply manifold 5 is arranged in a row on the side of the surge tank 6. The lower space 6B includes one end 5 of the horizontal portion 50A of the air supply manifold communicating with the first cylinder.
One end 50Ba of the horizontal portion 50B of the air supply manifold communicating with OAa and the third cylinder is open.
Further, in the upper space 6A, one end 50Ca of the horizontal portion 50C of the air supply manifold communicating with the second cylinder is provided.
is open. The other cylinders are also communicated with the surge tank 6 through air supply manifolds.
That is, the upper space 6A of the surge tank 6 is communicated with the air supply ports of the cylinders of the rear bank 3, and the lower space 6B is communicated with the air supply ports of the cylinders of the front bank 4, respectively. Therefore, interference of air intake in a multi-cylinder engine is eliminated. Furthermore, since the air supply manifold is taken out horizontally from the surge tank 6, the height of the air supply system can be reduced. The upper space 6A and the lower space 6B communicate with each other at a portion 6b without the partition wall 6a.

In FIG. 1, reference numeral 6c indicates a connection to a throttle chamber, which is not shown.

As can be seen from Fig. 1, the surge tank 6 is disposed above the rear part of the rear bank 3, and one end of the air supply manifold 5 is connected to the side of the surge tank 6 in a line, so that the height of the surge tank 6 is reduced. Since the engine body and the bonnet 2 can be brought closer together, the bonnet line can be lowered.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention;
The figure is a sectional view of a main part of an example of a surge tank. 1... Horizontal V-type engine, 2... Bonnet, 3... Rear bank, 4... Front bank,
5...Air supply manifold, 6...Surge tank.

Claims (1)

[Scope of utility model registration request] In the air supply system of a horizontal V-type engine in which a plurality of air supply ports are provided on opposite sides of the bank, there is a surge tank located above the rear of the bank located on the cabin side, and a surge tank located on the cabin side. The air supply manifold is disposed across the upper part of the bank and communicates each of the air supply ports with the surge tank, and one end of the air supply manifold is lined up on the side of the surge tank. An air supply system for a horizontally mounted V-type engine, which is characterized by being connected.