JPH0619806Y2 - Liquid-cooled air supply cooler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a liquid-cooled charge air cooler, and more particularly to a liquid-cooled charge air cooler that has high cooling efficiency and can be installed in a valley of a V-type engine. .

(Prior Art) In order to improve the engine output of vehicles, especially passenger cars, the number of engines equipped with a supercharger such as a turbocharger is increasing. When such a supercharger is equipped, a charge air cooler (intercooler) is provided in order to cool the supply air whose temperature has risen by the supercharger and improve the charging efficiency.

As this charge air cooler, an air-cooled type cooler that is easy to handle and has a simple structure is generally adopted. Such an air-cooled charge air cooler is arranged at a position having good ventilation, away from the engine, in order to ensure cooling efficiency.

(Problems to be solved by the invention) However, in the conventional air-cooled charge air cooler described above, the entire path of the intake system becomes long because the air-flow meter is arranged at a position away from the engine. There is a problem that the air supply capacity from the engine to the engine increases and the acceleration response deteriorates.

Further, in the air-cooled charge air cooler, the thin plate for heat exchange easily vibrates, and when it is used in combination with a supercharger that causes pressure fluctuations such as a supercharger, vibration increases due to film vibration on the intake pipe surface. There is also the problem of Further, the air-cooled charge air cooler is inevitably large in size in order to secure the cooling effect, which makes layout in the engine room difficult, and in particular, a V-type multi-cylinder engine, for example, a V-type 6-cylinder large-sized V cylinder. When a type engine is installed in a front-wheel drive vehicle, it is essential to make the entire engine compact.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a liquid-cooled charge air cooler that has high cooling efficiency and can be made compact.

(Means for Solving the Problems) In order to achieve the above object, according to the present invention, in a horizontal plane above an engine cylinder, they are arranged parallel to each other with a predetermined distance and extend in the cylinder row direction of the engine respectively. Are the first and second cooling cores separated from the upper cooling liquid passage and the lower cooling liquid passage by the air supply passage, and the first and second cooling cores at one end in the cylinder row direction of the first and second cooling cores. A tank divided into an upper chamber that is connected to the inside and communicates with the upper cooling liquid passages and a lower chamber that communicates with the lower cooling liquid passages; and the cylinders of the first and second cooling cores. At the other ends in the row direction, communication passages that respectively connect the upper cooling liquid passage and the lower cooling liquid passage, a cooling liquid introduction port formed in one of the upper chamber and the lower chamber of the tank, the upper chamber, and Formed on the other side of the lower chamber And a casing for accommodating the first and second cooling cores and the tank, a supply air inlet formed in the casing, and a vicinity of the first cooling core of the casing. And a plurality of supply air discharge ports which are formed in the vicinity of the second cooling core and communicate with the combustion chamber of the engine.

(Operation) The first and second cooling cores provided in parallel in the casing respectively have an upper chamber → upper cooling liquid passage → communication passage → lower cooling liquid passage → lower chamber (or lower chamber → lower). Side coolant passage → communication passage →
It is cooled by the cooling liquid flowing back in the path of the upper cooling liquid passage → the upper chamber. Then, the supply air introduced into the liquid-cooled supply air cooler from the supercharger is cooled when passing through the first and second cores, and is formed near each of the cores. It is distributed and supplied from the air supply outlet to the corresponding cylinders of the engine.

Embodiment An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

1 and 2 show a V-type engine to which the present invention is applied. The V-type engine 1 is a multi-cylinder engine, for example, a 6-cylinder engine, and the left column cylinder 2 and the right column cylinder 3 are arranged in three cylinders each. The left and right cylinder rows 2 and 3 are arranged at a predetermined bank angle. This V-type engine 1
A supply air cooler 5 is arranged along the longitudinal direction of the engine 1 above the valley 4 between the left and right cylinder rows 2 and 3, and the left and right sides of the supply air cooler 5 are Three pipes 6 and 7 for cooling and supplying air, which are cooled at predetermined intervals, are arranged on both sides. The left pipes 6 are connected to the intake manifolds of the corresponding cylinders of the right cylinder 3, and the right pipes 7 are connected to the intake manifolds of the corresponding cylinders of the left cylinder 2.

The upper part of the V-type engine 1 including the valley 4 is a dead space, and the dead space can be effectively used by disposing the cooler 5 in the dead space. Moreover, by disposing the charge air cooler 5 directly above the engine 1, the charge air cooler 5 and the engine 1
The pipes 6 and 7 communicating with the respective intake manifolds can be significantly shortened.

The left and right pipes 6 and 7 are intersected in order to make the connection to each cylinder as smooth as possible and to improve the air flow.

Further, the supply air inlet of the supply air cooler 5 is connected to the supply air discharge port of a turbocharger (both not shown) arranged in the engine 1 via an air supply passage. .
With this arrangement, it is possible to greatly reduce the length of the entire path of the intake system that connects the turbocharger, the charge air cooler 5, and the intake manifold of each cylinder of the engine 1.

The supply air cooler 5 is a liquid-cooling type cooler and is configured as shown in FIGS. That is, the supply air cooler 5 includes the casing 10 and the cooling core 11 housed in the casing 10. The casing 10 is formed in a thin rectangular parallelepiped shape having a length substantially equal to the length of the engine 1, and has a substantially L-shaped air supply introduction port 1 at the substantially center of one end face.
0a is formed, and air supply and discharge ports 10c are formed on both sides of the bottom plate 10b so as to correspond to the three cylinders of the left column and right column cylinders 2 and 3 of the engine 1.

The cooling core 11 has a substantially U shape in a top view, and is composed of left and right cooling parts 12 and 13, and a tank 14 integrally connected to one side of each of the cooling parts 12 and 13. Has been done. The cooling unit 13 and the tank 14 are horizontally defined in upper and lower two stages, respectively, and the cooling liquid passages 13a and 13b and the tank 14 are defined.
a and 14b, one end of each of the passages 13a and 13b is connected to each of the tanks 14a and 14b, and the other end thereof is connected to each other by a communication passage 15. Passages 13a and 13b
A space is formed between them and. Cooling fins 16, 17 and 18 are respectively arranged between these passages 13a and 13b and on both upper and lower sides to form a sandwich structure. Also, the upper and lower tanks 14a, 14
Nipples 19 and 20 are connected to the respective corners of b. These two nipples 19 and 20 are arranged on the opposite side.

The cooling unit 12 has the same structure as the cooling unit 13,
One ends of the upper and lower passages 12a and 12b are connected to the tanks 14a and 14b, respectively, and the other ends thereof are connected to each other by a communication passage 15. As shown in FIGS. 3 and 5, the cooling core 11 is arranged in the casing 10 so that the space between the cooling portions 12 and 13 on both sides faces the air supply inlet 10a, and the tank 14a, 14b each nipple 19,
Each tip of 20 is projected to the outside of the casing 10 from the side opposite to the air supply inlet 10a. In addition, each cooling unit 12,
13 are holes 10c on both sides of the bottom plate 10b of the casing 10.
A space is formed inside each of the cooling sections 12 and 13 and between each outer side of each of the cooling sections 12 and 13 and each side wall facing the casing 10.

As shown in FIG. 5, the casing 10 has, as shown in FIG. 5, two columns 22, 22 penetrating in the vertical direction substantially in the middle of the left and right cooling portions 12 and 13 of the cooling core 11,
The bottom plate 10b and the top plate 10d are firmly connected. Both ends of these columns 22, 22 are welded to the bottom plate 10b and the upper plate 10d, respectively, to fix them. As a result, the casing 10 has a large area so that the bottom plate 10b and the upper plate 10d are opposed to each other.
And are integrally connected at the central portion thereof. This allows
Vibration of the bottom plate 10b and the top plate 10d can be reduced.

As shown in FIGS. 1 and 2 described above, the charge air cooler 5 having such a structure is used for the left column and the right column cylinders 2 and 3 of the V-type engine 1.
Is connected to the intake port of the cylinder through the pipes 6 and 7 and the intake air inlet 10a is connected to the outlet of the supercharger (not shown) and the holes 10c of the bottom plate 10b are connected to the intake manifolds of the cylinders. Then, the nipples 19 and 20 of the tank 14 are connected to the cooling liquid circulation system, respectively. In this case, for example, the nipple 19 on the upper side of the tank 14 is used as the cooling liquid introduction port, and the nipple 20 on the lower side is used as the cooling liquid discharge port.

The operation will be described below.

The charge air discharged from the supercharger flows into the casing 10 through the inlet 10a of the charge air cooler 5, and the cooling core 11
Is introduced into the space between the left and right cooling units 12 and 13. The supply air introduced into the space is equally divided into right and left and passes between the cooling fins 16, 17 and 18 of the cooling units 12 and 13 of the sandwich structure, respectively. To the outside of each pipe from each hole 10c,
It is supplied to each cylinder via 7. As a result, the supply air is distributed to each cylinder in a substantially equal amount, and the distributability is secured.

On the other hand, the cooling liquid is passed through the nipple 19 to the upper tank 14
The cooling liquid in the tank 14a supplied to the a flows through the upper passages 12a and 13a of the left and right cooling units 12 and 13 as shown by the solid lines, and passes through the communication passages 15 and 15 at the tips. Each of the lower passages 12b and 13b is reached, and these respective passages 12b and 13b flow as shown by the dotted lines in FIG. 3 into the lower tank 14b, and are discharged through the nipple 20 and cooled. It is returned to the liquid circulation system.

The cooling liquid passes through the passages 12a of the cooling units 12 and 13,
Each cooling fin 16 when flowing through 12b, 13a, 13b
Heat exchange through 18 to these cooling fifun 1
The charge air passing between 6 and 18 is cooled. Each of the upper passages 12a and 13a is the outward passage of the cooling liquid, and the lower passages 12b and 1a.
Since 3b is a return path, the supply air passing between the cooling fins 17 is cooled more effectively than the air passing between the cooling fins 18, but the supply air passing between the cooling fins 16 to 18 is In the space between the side wall of the casing 10 and the side wall of the casing 10, the mixture is agitated to a substantially uniform temperature. Thus, the engine 1
The supply air supplied to each cylinder can be efficiently cooled. Further, the space between each of the cooling sections 12 and 13 and each of the opposing side walls of the casing 10 has a function of a surge tank and also has an effect of suppressing supply air pulsation. The cooling liquid may be circulated in the opposite direction to the above.

In addition, the bottom plate 10b and the top plate 10 of the casing 10 which are opposed to each other.
Since d is firmly connected to the support columns 22 and 22, vibrations of both of them are suppressed. As a result, when the engine is equipped with a supercharger or the like that causes pressure fluctuations, vibrations due to film vibrations on the surface of the intake system are suppressed, and noise is reduced accordingly. The casing 10
It is possible to further suppress the noise caused by the pulsation noise of the air supply system generated by the supercharger by selecting the shape of the above, the thicknesses of the bottom plate 10b, the upper plate 10d, and the like.

In the present embodiment, the case where the cooling liquid passage of the cooling unit is formed in upper and lower two stages has been described, but the present invention is not limited to this, and the cooling liquid may be circulated by defining a plurality of stages of two or more stages. You may

Further, the present invention can be applied to a boiling cooling type intercooler in addition to the liquid cooling type air supply cooler described above.

(Effects of the Invention) As described above, according to the present invention, in the horizontal plane above the engine cylinder, they are arranged parallel to each other with a predetermined distance and extend in the cylinder row direction of the engine to cool the inside by the air supply passage. First and second cooling cores separated into a liquid passage and a lower cooling liquid passage;
And a second cooling core, which is connected at one end in the cylinder row direction, is divided into an upper chamber communicating with the upper cooling liquid passages and an inner chamber communicating with the lower cooling liquid passages. Any one of a tank, a communication passage that communicates an upper cooling liquid passage and a lower cooling liquid passage at the other ends of the first and second cooling cores in the cylinder row direction, and an upper chamber and a lower chamber of the tank. A cooling liquid inlet formed on one side, a cooling liquid discharge port formed on the other side of the upper chamber and the lower chamber, a casing containing the first and second cooling cores and the tank, A supply air inlet formed in the casing, and a plurality of supply air outlets formed near the first cooling core and the second cooling core of the casing and communicating with the combustion chamber of the engine. By installing the Is achieved, it is possible to increase the charging efficiency of the to with air supply of the engine this. Also, the first
By arranging the second cooling cores side by side at a predetermined interval, the supplied air can be divided into substantially equal parts and supplied to the cooling core, and the supplied air can be supplied to the cooling core. Distributability is improved and cooling efficiency is improved. Furthermore, there is an excellent effect that it can be made compact and that the radiation area of the noise can be made small when combined with a supercharger that generates noise such as charge air pulsation noise due to the compactness.

[Brief description of drawings]

FIG. 1 is an end view of a V-type engine equipped with a liquid-cooled charge air cooler according to the present invention, FIG. 2 is a top view of FIG. 1, and FIG. 3 is a liquid-cooled charge air cooler according to the present invention. Top view showing an embodiment of a container,
FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3, and FIG. 5 is a cutaway perspective view of an essential part of FIG. DESCRIPTION OF SYMBOLS 1 ... V type engine, 2, 3 ... Cylinder row, 5 ... Liquid-cooled air supply cooler, 6, 7 ... Pipe, 10 ... Casing, 11 ...
Cooling fins, 12, 13 ... Cooling unit, 14 ... Tank, 1
6 to 18 ... Cooling fins, 22 ... Struts.

Claims (1)

[Scope of utility model registration request] 1. A horizontal plane above an engine cylinder, which is arranged in parallel with each other at a predetermined distance from each other, extends in the cylinder row direction of the engine, and the inside is separated by an air supply passage into an upper cooling liquid passage and a lower cooling liquid passage. The first and second cooling cores and the upper chamber that connects the first and second cooling cores at one end in the cylinder row direction of the first and second cooling cores and the inside communicates with each of the upper cooling liquid passages; A tank divided into a lower chamber that communicates with each lower cooling liquid passage,
At the other ends of the first and second cooling cores in the cylinder row direction, there are provided communication passages that respectively connect the upper cooling liquid passage and the lower cooling liquid passage, and one of the upper chamber and the lower chamber of the tank. The formed cooling liquid introduction port, the cooling liquid discharge port formed in the other of the upper chamber and the lower chamber, the casing for housing the first and second cooling cores and the tank, and the casing. And a plurality of air supply outlets formed near the first cooling core and the second cooling core of the casing and communicating with the combustion chamber of the engine. A liquid-cooled air supply cooler characterized by the above.