JP2517063Y2 - Intake manifold cooling device for V-type internal combustion engine in automobile - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Field of Industrial Use The present invention provides a V-type internal combustion engine in which a pair of cylinder rows are arranged in a V shape in the engine room of an automobile. Further, the present invention relates to an intake manifold cooling device for a V-type internal combustion engine in a vehicle in which a supercharger is connected to an upstream side of an intake manifold for introducing intake air into each cylinder row via an intercooler.

(2) Conventional Technology In recent years, a turbocharger or other supercharger has been widely mounted in order to increase the output of an internal combustion engine for automobiles. However, when the supercharger as described above is used, the temperature of the intake air pressurized by the compressor rises, which causes new problems such as a decrease in charging efficiency and occurrence of early ignition. An intercooler is installed in the intake path connecting the feeder and the engine to cool the intake air.

By the way, in the V-type internal combustion engine, the shape of the intake manifold tends to be complicated and lengthened in order to increase the number of cylinders and improve intake efficiency, and this intake manifold tends to cause heat conduction from a cylinder head which is a heat source. It may be heated by the temperature inside the engine compartment. When such heating of the intake manifold occurs, the temperature of the intake air cooled by the intercooler rises again while passing through the inside of the intake manifold, and the function of the intercooler is not fully exerted. It is necessary to take measures to prevent it.

Therefore, for example, as described in Japanese Utility Model Application Laid-Open No. 62-105333, a large number of cooling fins are formed on the surface of the intake manifold, and traveling air or cooling air from a radiator fan is applied to the cooling fins. It is conceivable to apply the cooling technology to the V-type internal combustion engine.

(3) Problems to be Solved by the Invention However, in recent years, a large number of auxiliary machines such as an oil pump for power steering and a compressor for air conditioning are mounted inside an engine room of an automobile, so that the air flow of the air flows. Unfortunately, it was difficult to sufficiently cool the intake manifold only by applying the cooling fins.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cooling device for efficiently cooling an intake manifold while making the entire engine including an intake system compact.

B. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention arranges an intercooler in a V bank of a V-type internal combustion engine, and substantially saddles so as to straddle the intercooler. An intake manifold formed in a shape and arranged above the V bank, and an intake chamber located directly above the intercooler and communicating with the outlet side of the intercooler; A plurality of intake passages are respectively connected to the intake ports of the cylinder row, and cooling fins are projectingly provided on an outer surface of the peripheral wall of the intake chamber facing the bonnet and sucked through an air intake hole formed in the bonnet. A cooling fan for blowing outside air toward the cooling fin is provided between the air intake hole and the cooling fin.

(2) Operation According to the above configuration, the intercooler and the intake manifold can be comfortably and compactly housed in the V bank of the internal combustion engine and in the space above the intake bank while shortening the intake path from the intercooler to each intake port. .

Moreover, since the cooling fins on the outer surface of the peripheral wall of the intake chamber can be reasonably brought close to the air intake hole of the bonnet and the cooling fan, the outside air blown from the fan can be effectively blown to the cooling fins. The intake air before being distributed to a plurality of intake paths can be cooled in one place, that is, in the intake chamber, with extremely high efficiency,
As described above, in combination with the effect of suppressing the rise in intake air temperature downstream of the intercooler by shortening the intake path, the recooling effect of intake air flowing out from the intercooler in the intake manifold is greatly enhanced.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, this engine E is a V type 6
In the cylinder engine, three cylinders 2 are arranged inside each cylinder block 1 of the front and rear cylinder rows C ₁ and C ₂ arranged in a V shape.
A combustion chamber 5 is formed on the bottom surface of a cylinder head 4 facing a piston 3 slidably fitted to each cylinder 2, and an intake port 6 and an exhaust port 7 opening to the combustion chamber 5 are an intake valve 8 and an exhaust valve, respectively. It is opened and closed by 9. The intake valve 8 is a camshaft located above the cylinder head 4.
The exhaust valve 9 is engaged with the intake cam 10a of the cam shaft 10 via a cam follower 11, while the exhaust valve 9 is connected to the exhaust cam 10b of the cam shaft 10.
Are engaged via a cam follower 12, a push rod 13, and a rocker arm 14.

This engine E is equipped with a turbocharger TC as a supercharger, and high-speed exhaust gas discharged from each of the exhaust ports 7 is introduced into the turbocharger TC to drive the turbine wheel T to rotate at high speed. After that, it is discharged toward the muffler M. On the other hand, the air sucked in through the air cleaner A is compressed by the compressor wheel C that rotates together with the turbine wheel T and is sent to the air duct 15. As is clear from FIG. 2, the air duct 15 is connected to the cylinder row on the rear side from the turbocharger TC.
It extends through the top of C ₂ to the opposite end of engine E.

As shown in FIG. 1 and FIG. 3, both cylinder rows C ₁ , C ₂
A water-cooled intercooler IC is provided in the V bank. This intercooler IC has a box-shaped casing 16
Equipped with four brackets 17 protruding from both sides
A bolt 18 is screwed from below to the lower surface of the intake manifold, which is described below. The inlet hole 16a formed in the upper rear part of the casing 16 is connected to the air duct 15, and the outlet hole 16b formed in the front part of the casing 16 has an elbow 1.
It is connected via 9 to a throttle body 20 having a throttle valve 20a inside. As is clear from FIG. 3, the water supply pipe 21 is provided inside the casing 16 of the intercooler IC.
The heat exchanger 21 including the a and the drain pipe 21b is obliquely arranged, and the pump 22 and the radiator 23 include the water supply pipe 21a and the drain pipe 2 described above.
It is connected to 1b to form a circulation path for cooling water.

An intake manifold 24, which is saddle-shaped as a whole and which straddles the intercooler IC, is arranged above the inside of the V bank to distribute the supply air from the throttle body 20 to the intake ports 6. This intake manifold 24
The intake chamber 24a has an intake chamfer 24a, one end of which is connected to the throttle body 20 and extends along the upper portion of the V bank, and is located substantially directly above the intercooler IC.
Has three intake passages 24b connected to the intake ports 6 of each of the cylinder rows C ₁ and C ₂ extending from both sides, and at the upper surface of the peripheral wall, that is, the surface facing the bonnet 30, for heat dissipation. 6 cooling fins 24c are projected. As is apparent from FIG. 4, the joint surface for the cylinder head 4 formed on the lower surface of the intake manifold 24 has the above-mentioned 6
The individual intake passages 24b are opened, and a fuel injection nozzle N is arranged near the opening of each intake passage 24b. The intercooler IC described above is fastened to the lower surface of the intake manifold 24 by four bolts 18 in a suspended state, and the intake manifold 24 has a gasket G.
It is fastened to the cylinder head 4 from above by nine bolts 25 via.

FIGS. 5 and 6 show a gasket G used for the front side cylinder row C _1. The gasket G has three intake passages each having a bulge portion 26a corresponding to the fuel injection nozzle N. A hole 26 and a plurality of bolt insertion holes 27 for attaching the intake manifold 24 to the cylinder head 4 are formed. Reference numeral 28 is a gasket G on the front side.
It is an EGR through hole formed only on the. Above gasket G
Has a structure in which three stainless steel plates 29a and 29b are laminated, and the outer two layers of stainless steel plates 29b are coated with NBR heat resistant rubber. By using this gasket G, it is possible to absorb the height difference between the front and rear cylinder rows C ₁ and C ₂ and reduce the heat conduction from the cylinder head 4 to the intake manifold 24. Becomes Since the structure of the gasket G on the rear side is the same as that of the gasket G on the front side described above, and only the shape is different, the duplicated description will be omitted.

As shown in FIG. 7, the above-mentioned engine E is horizontally installed in the engine room R of the FF type vehicle Am, and the air intake hole formed in the bonnet 30 located above the engine E.
A cooling fan 32 that is forcibly driven by a motor 31 is mounted on the back surface of 30a. And this cooling fan 32
The motor 31 that drives the engine is controlled by the operating conditions of the engine E, and the air taken in from the outside via the air intake hole 30a is introduced into the intake manifold 24 located on the upper surface of the engine E. The formed cooling fins 24c are sprayed to cool them.

Further, in the engine room R, in front of the engine E, a radiator 33 and a radiator fan 34 for water cooling of the engine body are arranged.

 Next, the operation of this embodiment will be described.

The intake air that has been purified by passing through the air cleaner A is compressed to a high temperature / high pressure state by the compressor wheel C of the turbocharger TC and is sent to the air duct 15. The intake air that has flowed from the air duct 15 into the casing 16 of the intercooler IC arranged in the V bank of the engine E is a heat exchanger.
After passing through 21 to be cooled and densified, it reaches the intake chamber 24a of the intake manifold 24 via the throttle valve 20a. At this time, the bonnet 30 is attached to the cooling fins 24c formed on the upper surface of the intake chamber 24a.
Cooling air is supplied from a cooling fan 32 provided on the rear surface of the cooling fan 32. This cooling air, together with the running air and the cooling air from the radiator fan 34, cools the intake manifold 24, further lowering the temperature of the intake air flowing through it. .

Thus, the cooled intake air is diverted from the intake chamber 24a into the six intake passages 24b, and mixed with the fuel supplied from the fuel injection nozzle N inside the intake port 6 connected to the intake passages 24b. It is delivered to the combustion chamber 5 of the cylinder 2.
The exhaust gas discharged from the combustion chamber 5 is exhaust port 7
Is supplied to the turbocharger TC via the, and the turbine wheel T is rotationally driven.

Although the embodiment of the intake manifold cooling apparatus for an internal combustion engine according to the present invention has been described in detail above, the present invention is not limited to the above embodiment, and deviates from the present invention described in the scope of utility model registration claims. It is possible to make various small design changes without any need.

For example, the cooling fan 32 does not necessarily have to be attached to the bonnet 30, and the cooling fan 32 can be supported on the engine E side. Further, the drive control of the cooling fan 32 can be performed based on not only the operating conditions of the engine E but also the cooling water temperature, the intake air temperature, the engine room temperature, and the like.

C. Effect of the Invention As described above, according to the present invention, the intercooler is arranged in the V bank of the V-type internal combustion engine, and is formed in a substantially saddle shape so as to straddle the intercooler and is arranged above the V bank. An intake manifold located directly above the intercooler and communicating with the outlet side of the intercooler; and a plurality of intake passages extending from the intake chamber and connected to the intake ports of the pair of cylinder rows, respectively. Since it is composed of the above, the intercooler and the intake manifold can be comfortably and compactly housed in the V bank of the internal combustion engine and in the space above it while shortening the intake path from the intercooler to each intake port. It is possible to contribute to downsizing of the entire engine including.

Moreover, a cooling fin is provided on the outer surface of the peripheral wall of the intake chamber facing the bonnet, and a cooling fan for blowing the outside air sucked through the air intake hole formed in the bonnet toward the cooling fin is installed in the air intake hole. And the cooling fin, the cooling fin on the outer surface of the intake chamber peripheral wall can be reasonably brought close to the air intake hole of the bonnet and the cooling fan, and the outside air blown from the fan is cooled by the cooling fin. As described above, since the intake air before being distributed from the intake chamber to the plurality of intake passages can be effectively cooled in one place, that is, in the intake chamber, can be efficiently cooled. In addition to the effect that the intake air temperature is prevented from rising at the downstream side of the intercooler due to the shortening of the intake path, it flows out from the intercooler. Recooling effect in the intake manifold for gas it is possible to increase greatly, the above results, the supercharging effect is sufficiently exerted, the burden of the intercooler is alleviated can be achieved the miniaturization.

[Brief description of drawings]

1 is a front view of a V-type multi-cylinder engine according to an embodiment of the present invention, FIG. 2 is a plan view taken along the line II of FIG. 1, and FIG. 3 is a sectional view taken along the line III-III of FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, FIG. 5 is a plan view of the gasket, and FIG. 6 is VI in FIG.
-VI line sectional drawing, FIG. 7 is a longitudinal sectional view of an engine room. Am ... Car, E ... Engine, IC ... Intercooler, R ...
… Engine room 24 …… Intake manifold, 24c …… Cooling fins, 30 ……
Bonnet, 30a ... Air intake hole, 32 ... Cooling fan

Claims (1)

(57) [Scope of utility model registration request] 1. A V-type internal combustion engine (E) comprising a pair of cylinder rows (C ₁ , C ₂ ) arranged in a V shape is arranged in an engine room (R) of an automobile (Am), Each cylinder row (C ₁ ,
In an intake manifold cooling device for a V-type internal combustion engine in an automobile, in which a supercharger (TC) is connected via an intercooler (IC) to the upstream side of an intake manifold (24) for introducing intake air into C ₂ ). , The intercooler (IC) is arranged in a V bank of a V-type internal combustion engine (E), and the intake air is formed in a substantially saddle shape so as to straddle the intercooler (IC) and is arranged above the V bank. An intake chamber (24a), which is located just above the intercooler (IC) and communicates with an outlet side of the intercooler (IC), and a manifold (24) extending from the intake chamber (24a), respectively. Formed in the bonnet (30) of the peripheral wall of the intake chamber (24a), which is composed of a plurality of intake passages (24b) each connected to the intake ports (6) of the cylinder rows (C ₁ , C ₂ ) of Suction through the intake hole (30a) A cooling fan (32) for blowing the outside air toward the cooling fin (24c) is provided between the air intake hole (30a) and the cooling fin (24c).
An intake manifold cooling device for a V-type internal combustion engine in an automobile.