JPH10103073A - V-engine supercharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the performance of a V-engine supercharging device. SOLUTION: A V-engine supercharging device has a discharge opening 33 formed in the top of a supercharger housing 34, a collector part 11 arranged so as to communicate with the discharge opening 33 over the top of the supercharger housing 34, branch parts 12 surrounding the supercharger housing 34, and an intake manifold 10 partly defined by the supercharger housing 34. That arrangement leads intake air discharged out of a supercharger 6 round the supercharger housing 34 to associated cylinders.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a supercharger for a V-type engine.

[0002]

2. Description of the Related Art Some automobile engines have a supercharger which supercharges intake air and is provided with a supercharger driven by an engine via a speed increasing gear device.

[0003] As a conventional supercharger for a V-type engine, for example, there is one as shown in FIG.
24, reference).

To explain this, in a V-type engine, an intake manifold 90 is connected between left and right banks inclined in a V-shape, and a supercharger 96 for supercharging intake air is provided above the intake manifold 90.

The supercharger 96 has a pair of rotors 91 and 92 for pumping intake air by the rotation thereof,
Supercharger housing 94 for housing 1,92
And so on. The rotation of the engine is transmitted to each of the rotors 91 and 92 via a gear device (not shown). When the rotors 91 and 92 rotate at a high speed, the intake air is sucked from a suction port 98 opened at an upper portion of the supercharger housing 94, and the supercharger housing 94 is rotated.
Is discharged from a discharge port 99 opened at the lower part of the nozzle. The intake air discharged from the discharge port 99 is distributed to each cylinder of the left and right banks via the intake manifold 90.

The supercharger housing 94 is formed separately from the intake manifold 90, and is fastened to the cylinder head 82 by a plurality of bolts 83 via an elastic body 84. Supercharger housing 94
Is relatively displaced with respect to the cylinder head 82 via the elastic body 84, thereby absorbing a dimension crossing and a difference in thermal expansion during operation of the engine.

[0007]

However, in such a conventional supercharger for a V-type engine, the supercharger housing 94 mounted above the intake manifold 10 is structured to be exposed to the outside air. In addition, since heat is radiated from the supercharger housing 94 to the outside air, the temperature difference between the rotors 91 and 92 constituting the supercharger 96 and the supercharger housing 94 increases, and it is difficult to keep the clearance between the two small.

If the clearance change between the rotors 91 and 92 and the supercharger housing 94 is large, the efficiency of the supercharger 96 decreases, and the rotor 91 and the supercharger housing 94 decrease.
There is a possibility that interference between the rotors 92 and between the rotors 91 and 92 and the supercharger housing 94 may occur, resulting in deterioration of sound vibration. To cope with this, it is necessary to coat the surfaces of the rotors 91 and 92 and the like, which may cause a problem that the cost of the product is increased.

In addition, since the overall height of the engine is limited by the limited space of the engine room of the automobile, the structure in which intake manifold 90 is arranged below supercharger housing 34 has a structure in which intake manifold 90 and intake port 85 are provided. There is a problem that the passage length cannot be sufficiently secured and the charging efficiency of the intake air cannot be increased.

The present invention has been made in view of the above problems, and has as its object to improve the performance of a supercharger for a V-type engine.

[0011]

According to a first aspect of the present invention, a supercharger for a V-type engine includes a supercharger for supercharging intake air by rotation of a rotor, and a housing for accommodating the rotor in the supercharger. Equipped with an intake manifold that guides the intake air discharged from the supercharger to each cylinder, the intake manifold and the supercharger are respectively arranged between the left and right banks facing the V type, and the intake manifold is directed to each cylinder In a supercharger for a V-type engine including a branch portion that branches and a collector portion in which each branch portion gathers, a discharge port that discharges intake air is opened in an upper part of a housing of the supercharger,
A collector part communicating with the discharge port is arranged so as to cover at least an upper part of the housing, each branch part is arranged so as to surround at least a side part of the housing, a part of the intake manifold is defined by the housing, and The discharged intake air is guided to each cylinder through the housing.

According to a second aspect of the present invention, there is provided a supercharger for a V-type engine according to the first aspect of the present invention, further comprising a gear device for transmitting the power of the engine to the supercharger, wherein the collector unit is at least one of the gear devices. Arrange to cover the top.

According to a third aspect of the present invention, in the supercharger for a V-type engine according to the first or second aspect, the intake manifold is formed by pressing a metal plate.

According to a fourth aspect of the present invention, in the supercharger for a V-type engine according to the third aspect of the present invention, a housing of the supercharger is formed by casting, and a sheet metal intake manifold is cast into the housing.

According to a fifth aspect of the present invention, in the supercharger for a V-type engine according to any one of the first to fourth aspects, the branch portions connected to the left and right banks cross each other.

According to a sixth aspect of the present invention, in the supercharger for a V-type engine according to any one of the first to fifth aspects, both the discharge port of the supercharger and the bypass suction port are provided in the collector portion. A bypass valve is provided which opens and opens and closes a bypass suction port according to engine operating conditions.

According to a seventh aspect of the present invention, there is provided a supercharger for a V-type engine according to any one of the first to sixth aspects, further comprising a throttle valve for restricting intake air taken into the supercharger, A throttle chamber for accommodating a throttle valve is provided, and the throttle chamber is connected to a supercharger.

According to an eighth aspect of the present invention, there is provided the supercharger for a V-type engine according to any one of the first to seventh aspects, wherein the intercharger for promoting heat exchange between the intake air discharged from the supercharger and the outside air is provided. A cooler is arranged above the supercharger, a bypass passage communicating with the discharge port and the suction port of the supercharger and distributing intake air to each intercooler is arranged, and a left and right side where each branch portion gathers in the intake manifold A collector section is provided, and a bypass passage is arranged between the collector sections.

According to a ninth aspect of the present invention, there is provided a supercharger for a V-type engine according to any one of the first to eighth aspects, wherein the intake manifold is formed integrally with a housing of the supercharger. Fasten the intake manifold to the engine body.

[0020]

In the turbocharger for a V-type engine according to claim 1, intake air is discharged from a discharge port of the supercharger to a collector, and is distributed from the collector to each cylinder through each branch and an intake port. You.

In the turbocharger, the temperature of the housing increases as the intake air is pressurized. However, the upper portion of the housing is covered by the collector portion, and the side portion of the housing is covered by the branch portion. The heat radiation from the outside to the outside air is suppressed.

A part of the intake manifold is defined by the housing, and the intake air discharged from the supercharger is guided to each cylinder through the periphery of the housing. As a result, the intake manifold is heated, and heat radiation from the housing to the intake manifold is suppressed.

In this way, since the heat radiation from the housing of the supercharger to the outside air is suppressed, the temperature difference between the rotor and the housing constituting the supercharger can be reduced, and the clearance between the two can be kept small. The efficiency of the turbocharger can be increased.

Further, by reducing the temperature difference between the rotor and the housing to prevent interference between the rotors and between the rotor and the housing, noise and vibration generated from the supercharger can be reduced. As a result, it is not necessary to apply a coating to the surface of the rotor or the like, and the cost of the product can be reduced.

Further, since the heat release from the housing of the supercharger to the outside air is suppressed, the temperature of the intake air at the time of cold is increased, the warm-up of the engine is promoted, and the unburned H
C emission can be reduced.

Since the collector portion of the intake manifold is arranged at the upper part of the housing, and each branch portion extends so as to surround the housing, a sufficient length of the passage of each branch portion and the intake port can be secured while suppressing the overall height of the engine. It is possible to increase the intake efficiency in the low speed range.

In the turbocharger for a V-type engine according to the present invention, since the collector is disposed so as to cover at least the upper part of the gear device, noise such as rattling noise generated from the gear device is blocked by the intake manifold. The noise transmitted to the outside is reduced.

In the turbocharger for a V-type engine according to the third aspect, since the intake manifold is formed by pressing a metal plate, the intake manifold is made thinner, and the weight of the intake system is reduced. Further, by reducing the thickness of the intake manifold, the temperature of the intake air at the time of cooling is increased more quickly, which facilitates warming up of the engine and reduces the amount of unburned HC emissions.

Since the collector portion of the intake manifold is disposed above the turbocharger and each branch portion extends so as to surround the housing of the turbocharger, the rigidity of the intake manifold is increased in cooperation with the housing. For this reason, even if the thickness of the intake manifold is reduced, the intake manifold is suppressed from resonating due to vibration transmitted from the gear device or a pressure wave generated therein, thereby preventing generation of vibration and noise from the intake manifold.

In the turbocharger for a V-type engine according to the fourth aspect of the present invention, since the intake manifold made of sheet metal is cast into the housing of the turbocharger, the intake manifold is connected to the housing with high rigidity.
As a result, even if the thickness of the intake manifold is reduced, resonance is suppressed by vibration transmitted from the gear device and pressure waves generated inside the intake manifold, and vibration and noise from the intake manifold can be prevented. .

In the turbocharger for a V-type engine according to the fifth aspect, since the branches connected to the left and right banks intersect each other, the passage length of each branch and the intake port can be further increased. It becomes possible, and the intake efficiency in the low speed range can be increased.

In the turbocharger for a V-type engine according to the present invention, since the discharge port and the bypass suction port of the turbocharger are both opened in the collector portion, the intake air discharged from the supercharger is again suctioned by the bypass. The function of the bypass passage leading to the mouth is performed by the collector portion, and the bypass passage prevents the overall height of the engine from increasing.

Since the bypass valve is interposed in the bypass suction port of the turbocharger, the bypass valve can suppress an increase in the overall height of the engine. As a result, it is possible to sufficiently secure the passage length of each branch portion and the intake port, and it is possible to enhance the intake efficiency in a low speed range.

In the turbocharger for a V-type engine according to the present invention, the throttle chamber is heated by the heat transfer from the supercharger due to the structure in which the throttle chamber is connected to the supercharger. Thereby, it is possible to prevent the throttle valve from freezing and malfunctioning in cold weather.

In the supercharger for a V-type engine according to the present invention, the intake air discharged from the discharge port of the supercharger to the bypass passage flows into the right and left collector portions after being cooled through the intercooler, The air is distributed from the left and right collectors to the respective cylinders through the respective branches and the intake ports.

Although the intercooler is arranged above the supercharger housing, the bypass passage is arranged between the left and right collectors, so that the overall height of the engine is suppressed and the length of each branch and the intake port is reduced. Can be sufficiently secured, and the intake efficiency in the low speed range can be increased.

In the turbocharger for a V-type engine according to the ninth aspect, the housing of the turbocharger and the intake manifold are integrated with each other and fastened to the engine body by bolts. Is enhanced.

[0038]

According to the supercharger for a V-type engine according to the present invention, the heat radiation from the housing of the supercharger to the outside air is suppressed, so that the temperature difference between the rotor and the housing constituting the supercharger. And the clearance between them can be kept small to increase the efficiency of the turbocharger.

Further, since the interference between the rotors and the interference between the rotor and the housing are prevented, it is not necessary to apply a coating to the surface of the rotor and the like, thereby reducing the cost of the product.

Further, it is possible to sufficiently secure the passage lengths of the respective branch portions and the intake ports while suppressing the overall height of the engine, thereby improving the engine output.

According to the supercharger for a V-type engine according to the second aspect, noise such as rattling noise generated from the gear device is blocked by the collector portion covering the upper portion of the gear device, and the quietness is improved. To be peeled off.

According to the turbocharger for a V-type engine according to the third aspect, the warming of the engine can be promoted by the intake manifold made of sheet metal, and the emission of unburned HC can be reduced.

According to the turbocharger for a V-type engine, since the intake manifold made of sheet metal is cast into the housing of the turbocharger, the intake manifold is connected to the housing with high rigidity. In addition, the sound vibration of the engine can be further enhanced.

According to the turbocharger for a V-type engine according to the fifth aspect, the passage of each branch and the intake port is suppressed while the overall height of the engine is suppressed by the respective branches which cross each other and are connected to the left and right banks. A sufficient length can be secured, the intake efficiency in the low-speed range can be increased, and the engine output can be improved.

According to the turbocharger for a V-type engine according to the sixth aspect, a collector portion which functions as a bypass passage;
Bypass valve interposed in the bypass inlet of the turbocharger makes it possible to keep the overall height of the engine and to secure a sufficient length of each branch section and the intake port, thereby improving intake efficiency in the low-speed range. And the engine output is improved.

According to the turbocharger for a V-type engine according to the present invention, it is possible to prevent the throttle chamber from being heated by the heat transfer from the turbocharger and freezing the throttle valve in cold weather to cause malfunction. . As a result, the conventional piping for circulating the engine cooling water to the throttle chamber is eliminated, and the structure is simplified.

According to the supercharger for a V-type engine, the intercooler is disposed above the supercharger housing, but is provided by the bypass passage disposed between the left and right collectors. It is possible to sufficiently secure the passage length of each branch portion and the intake port while suppressing the overall height, so that the intake efficiency in the low-speed range can be increased, and the engine output can be improved.

According to the turbocharger for a V-type engine according to the ninth aspect, the housings of the intake manifold and the turbocharger have increased support rigidity with respect to the respective engine bodies, so that the vibration transmitted from the speed increasing gear device is increased. And resonance caused by pressure waves generated in the inside thereof can be suppressed, and generation of vibration and noise can be prevented.

[0049]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 5, an intake passage provided in an automobile engine is provided with an air cleaner 1 for taking in intake air.
, A throttle chamber 4 for accommodating a throttle valve 5, a supercharger (mechanically driven supercharger) 6 for supercharging intake air, an intake manifold 10 for distributing intake air to each cylinder, and the like.

The air cleaner 1 is mounted on a vehicle body (not shown). The air cleaner 1 and the throttle chamber 4 are communicated via a duct 3. An air flow meter 2 for detecting an intake air amount is attached to the duct 3.

As shown in FIG. 1, the V-type engine has left and right banks inclined in a V-shape, and cylinders having non-sequential ignition orders are arranged in the left and right banks. Cylinder block 2
The left and right cylinder heads 22 are provided on the upper part of the cylinder 0. In the figure, reference numeral 25 denotes a rocker cover, and the two rocker covers 25 define a valve operating chamber 26 on each cylinder head 22.

An exhaust pipe (not shown) is connected to an exhaust port 24 formed outside the left and right cylinder heads 22.

Each intake port 27 communicating with each cylinder is formed inside the left and right cylinder heads 22.
The intake manifold 10 is connected to 7. 2 in the figure
Reference numeral 8 denotes an injector, which injects fuel from the injector 28 to each intake port 27.

In the present embodiment, a compression displacement type supercharger 6 is provided as a supercharger for supercharging intake air. The supercharger 6 includes a pair of rotors 31 and 32 for pumping the intake air by the rotation thereof, a supercharger housing 34 for accommodating the rotors 31 and 32, and the like. The screw type rotors 31 and 32 are arranged above the left and right cylinder heads 22 in parallel with the crankshaft.

As another embodiment, the supercharger may be constituted by a roots blower type supercharger which is a non-compressed displacement type.

As shown in FIG. 2, a pulley 15 to which the rotation of the engine is transmitted via a belt is provided in front of the supercharger housing 34, and a gear device 1 is provided between the supercharger housing 34 and the pulley 15.
6 are provided. The gear device 16 includes a speed increasing gear 45 that speeds up the rotation of the pulley 15 and a drive gear 46 that reverses the rotors 31 and 32 in synchronization with each other.

When the rotors 31 and 32 rotate at a high speed, the suction port 39 of the supercharger housing 34 is rotated.
Then, the intake air is sucked in from the outlet, and the intake air is discharged from a discharge port 33 opened at a front portion of the supercharger housing 34.

The throttle chamber 4 is provided with two throttle valves 5. Each butterfly valve 5 of the butterfly type rotates in response to an accelerator pedal, thereby restricting the intake air drawn into the supercharger 6.

The suction port 39 of the supercharger 6 opens at the rear end of the supercharger housing 34. The throttle chamber 4 is directly connected to the rear end of the supercharger housing 34.

As shown in FIG. 4, the supercharger housing 34 is formed integrally with the intake manifold 10 so as to be surrounded by the intake manifold 10. Intake manifold 10 is fixedly fastened to cylinder head (engine body) 22.

The intake manifold 10 is joined over the upper portions of the left and right cylinder heads 22 and is fixedly fastened by a plurality of bolts 41 and 42 without interposing an elastic body. Each bolt 41, 42 is connected to the intake manifold 10
And screwed into a screw hole formed in the cylinder head 22. A gasket is interposed between the intake manifold 10 and the left and right cylinder heads 22 to seal the intake passage.

As described above, the supercharger housing 34 and the intake manifold 10 are integrated with each other and fastened to the cylinder head 22 by a plurality of bolts without interposing an elastic body.
2 is increased in support rigidity.

The intake manifold 10 includes a branch section 12 branching toward each cylinder, and a collector section 11 in which the branch sections 12 are assembled.

The intake manifold 10 has a collector ceiling 18 defining the upper part of the collector 11 formed separately. The collector section 18 is the intake manifold 10
Is fastened through a plurality of bolts 19.

The discharge port 33 of the supercharger 6 opens at the front upper part of the supercharger housing 34. The collector unit 11 is arranged so as to cover the upper part of the supercharger 6. The discharge port 33 of the supercharger 6 opens to the collector section 11, and the intake air pressurized by the supercharger 6 is discharged directly from the discharge port 33 to the collector section 11.

A bypass suction port 38 is opened in the upper rear part of the supercharger housing 34. The bypass suction port 38 of the supercharger housing 34 opens to the collector 11. The intake pressure discharged from the discharge port 33 of the supercharger 6 is sucked into the bypass suction port 38 through the collector section 11, so that the discharge pressure of the supercharger 6 is suppressed.

A bypass valve 72 for opening and closing the bypass suction port 38 is provided. The butterfly type bypass valve 72 is connected to the suction port 3 of the supercharger housing 34.
9 so as to be rotatable.

The bypass valve 72 has an actuator 73
Is driven to open and close. The control unit (not shown) opens the bypass valve 72 during operation with a small engine load, for example, to reduce the supercharging pressure by the supercharger 6 and reduce the drive loss of the supercharger 6.

Each of the intake ports 27 has one end opening to the upper part of the left and right cylinder heads 22, and the other end opening to the combustion chamber wall of the cylinder head 22.

As shown in FIG. 3, the branch portions 12 connected to the left and right banks extend so as to surround the supercharger 6 and cross each other. In FIG. 1, a line segment I is a passage center line between each branch portion 12 and each intake port 27. In the front view of FIG. 1, each passage center line I extends so as to intersect the X-shape with the supercharger 6 interposed therebetween. That is, the left cylinder head 22
Are connected to the right side of the collector section 11, and the branch sections 12 connected to the right cylinder head 22 are opened to the left of the collector section 11.

The branch portions 12 are connected to each other and cover most of the side portion and the lower portion of the supercharger housing 34 without any gap. The passage width of each branch portion 12 is a portion that covers the side portion of the supercharger housing 34 and is doubled than a portion that surrounds the lower portion.

The configuration is as described above. Next, the operation will be described.

The supercharger 6 includes the rotors 31 and 3
By the rotation of 2, the intake air is discharged from the discharge port 33 to the collector section 11, and is distributed from the collector section 11 to each cylinder through each branch section 12 and the intake port 27.

Although the overall height of the engine is limited by the limited space in the engine room of the automobile, the collector 11 of the intake manifold 10 is disposed above the supercharger housing 34, and each branch 12 is connected to the supercharger housing 34. Each branch 1
2 and the passage length of the intake port 27 can be set large, and the charging efficiency of intake air in a low speed range can be increased.

The supercharger housing 34 and the intake manifold 10 are integrated with each other and fastened to the cylinder head 22 by bolts 41 without using an elastic body, so that the support rigidity for the cylinder head 22 is increased.

As a result, the resonance of the supercharger housing 34 due to the vibration transmitted from the speed increasing gear unit 16 and the pressure wave generated in the supercharger 6 is suppressed, and the vibration and noise from the supercharger housing 34 and the intake manifold 10 are reduced. It can be prevented from occurring.

The temperature of the supercharger housing 34 rises as the supercharger 6 pressurizes the intake air, but the upper part of the supercharger 6
And the majority of the side and lower portions of the supercharger 6 are covered by the respective branch portions 12, so that heat radiation from the supercharger housing 34 to the outside air is suppressed.

Since the discharge port 33 of the supercharger 6 is opened in the collector section 11, the intake manifold 10 is heated by the intake air having a higher temperature discharged from the supercharger 6, and the supercharger housing 34 is heated.
The heat radiation from the intake manifold 10 to the intake manifold 10 is suppressed.

Thus, the supercharger housing 3
By suppressing the heat radiation from the outside 4 to the outside air, the temperature difference between the rotors 31 and 32 constituting the supercharger 6 and the supercharger housing 34 can be reduced, and the clearance between the two can be kept small. 6 can be improved.

The temperature difference between the rotors 31 and 32 and the supercharger housing 34 is reduced so that
By preventing interference between the superchargers 1 and 32 and between the rotors 31 and 32 and the supercharger housing 34, noise and vibration generated from the supercharger 6 can be reduced. As a result, it is not necessary to apply a coating to the surfaces of the rotors 31, 32 and the like, and the cost of the product can be reduced.

Further, since the intake manifold 10 suppresses heat radiation from the supercharger housing 34 to the outside air, the temperature rise of the intake air at the time of cold is accelerated, the warming-up of the engine is promoted, and the emission of unburned HC is reduced. Can be reduced.

Since the collector portion 11 is disposed so as to cover the upper portion of the gear device 16, noise such as rattling noise generated from the gear device 16 and rolling noise generated from bearings is blocked by the intake manifold 10. The transmission to the outside can be suppressed.

Since the discharge port 33 of the supercharger 6 and the bypass suction port 38 are both opened in the collector section 11, the intake air discharged from the supercharger 6 is again supplied to the bypass suction port 38 as shown by the arrow in the figure. The collector section 11 fulfills the function of a guiding bypass passage, and the provision of the bypass passage can prevent the total height of the engine from increasing.

The bypass valve 72 is connected to the supercharger 6
, It is possible to avoid an increase in the overall height of the engine due to the interposed space of the bypass valve 72. As a result, each branch 12
In addition, it is possible to sufficiently secure the passage length of the intake port.

The structure in which the throttle chamber 4 is directly connected to the rear end of the supercharger housing 34 causes the throttle chamber 4 to be heated by the heat transfer from the supercharger housing 34. This allows
It is possible to prevent the malfunction of the throttle valve 5 due to freezing during cold weather.

Next, the embodiment shown in FIG. 6 will be described. The parts corresponding to those in FIG. 1 are denoted by the same reference numerals.

The outer wall of the intake manifold 10 is formed by pressing a metal plate. The outer wall of the intake manifold 10 is formed by pressing a metal plate into a collector frame 51, a collector upper plate 52, and a branch outer plate 5.
3 and the like, and these are cast into a supercharger housing 54 formed by casting.

As shown in FIG. 7, the collector frame 51 is formed by pressing a metal plate into a rectangular frame.

The collector upper plate 52 is formed into a square plate by pressing a metal plate.

The branch outer plate 53 is formed by pressing a metal plate into a shape defining each branch portion.

The lower edge 55 of the collector frame 51 and the peripheral edge 56 of the branch outer plate 53 are connected to the supercharger housing 5.
It is cast into four.

In this case, since the outer wall of the intake manifold 10 is formed by pressing a metal plate, the thickness of the intake manifold 10 is reduced, and the weight of the intake system is reduced. In addition, intake manifold 1
0, the temperature of the intake air at the time of cold is increased faster, the warm-up of the engine is promoted, and unburned HC is reduced.
Emissions can be reduced.

Since the sheet metal collector frame 51 and the branch outer plate 53 are cast into the supercharger housing 34, they are connected to the supercharger housing 34 with high rigidity.

Since the collector frame 51 is disposed above the supercharger housing 34 and each branch outer plate 53 extends so as to surround the supercharger housing 34, the collector frame 51 made of sheet metal and the branch outer plate 53 have rigidity. Is increased in cooperation with the supercharger housing 34, and even if the thickness of each is reduced, resonance caused by vibration transmitted from the gear device or a pressure wave generated inside the intake manifold 10 is suppressed. Vibration and noise can be prevented from occurring.

Next, the embodiment shown in FIGS. 8 to 10 will be described. The parts corresponding to those in FIG. 1 are denoted by the same reference numerals.

As shown in FIG. 10, an intake passage provided in an automobile engine is provided with an air cleaner 1 for taking in intake air.
A throttle chamber 4 for accommodating a throttle valve 5, a supercharger 6 for supercharging intake air, two intercoolers 7 for cooling intake air discharged from the supercharger 6, and an intake manifold for distributing intake air to each cylinder. 10 and the like.

Each intercooler 7 functions as a heat exchanger for promoting the heat of the intake air whose temperature has been increased by being compressed by the supercharger 6 to the outside air.
By cooling the intake air sent to the engine by each intercooler 7, the intake filling efficiency is increased while knocking of the engine is suppressed, and high output is achieved.

As shown in FIGS. 8 and 9, each intercooler 7 includes left and right core portions 68 for promoting heat radiation from the intake air flowing to the outside air as indicated by arrows in the drawings, and a supercharger 6.
A bypass passage 71 for introducing the intake air discharged from the discharge port 33 of the core section 68 to the core section 68, and four duct sections 69 for collecting the intake air passing through the core sections 68 and introducing the collected intake air to the left and right collector sections 61.

The supercharger 6 has a pair of rotors 31 and 32 for pumping intake air by the rotation thereof,
Supercharger housing 34 for housing 1, 32
And so on. Each rotor 31, 32 is arranged above the left and right cylinder heads 22 in parallel with the crankshaft.

The central bypass passage 71 and the right and left collector portions 61 are arranged above the supercharger 6 in parallel with the crankshaft.

When the rotors 31 and 32 rotate at a high speed, the suction port 39 of the supercharger housing 34 is rotated.
Then, the intake air is sucked in, and the intake air is discharged from a discharge port 33 opened at a front portion of the supercharger housing 34.

As shown in FIG. 8, the bypass passage 71 connects the suction port 39 and the discharge port 33 of the supercharger housing 34. A bypass valve 72 for opening and closing the bypass passage 71 is provided.

The butterfly type bypass valve 72 is rotatably housed in the suction port 39 of the supercharger housing 34. The bypass valve 72 is driven to open and close via an actuator (not shown). For example, by opening the bypass valve 72 during operation with a small engine load,
The supercharging pressure by the supercharger 6 is adjusted to be small, and the driving loss of the supercharger 6 is reduced.

The configuration is as described above. Next, the operation will be described.

The supercharger 6 includes the rotors 31 and 3
2 rotates the discharge port 33 from the bypass passage 71.
To the left and right core portions 6 from the central bypass passage 71.
After being cooled through 8, the air flows into the collector section 11 through each duct section 69, and is distributed from the left and right collector sections 11 to each cylinder through each branch section 12 and the intake port 27.

Although the total height of the engine is limited by the limited space of the engine room of the automobile,
1, each intercooler 7 and the collector unit 11 are arranged at the upper part of the supercharger housing 34, and each branch unit 12 extends so as to surround the supercharger housing 34. Can be sufficiently secured.

The intercooler 7 and the bypass passage 71 are arranged above the supercharger housing 34, but the bypass passage 71 is
1, the intercooler 7 can be arranged while suppressing the overall height of the engine.

Next, the embodiment shown in FIG. 11 will be described. The parts corresponding to those in FIG. 1 are denoted by the same reference numerals.

Each branch section 12 has a supercharger 6
Extends vertically so as to surround it. A line segment I in the drawing is a passage center line of each branch portion 12 and each intake port 27. Each passage center line I extends vertically so as to sandwich the supercharger 6 in the front view of FIG. That is, each branch portion 12 connected to the left cylinder head 22 opens on the left side of the collector portion 11,
Each branch portion 12 connected to the right cylinder head 22 is opened to the right of the collector portion 11.

Although the overall height of the engine is limited by the limited space in the engine room of the automobile, the collector section 11 of the intake manifold 10 is arranged above the supercharger housing 34, and each branch section 12 is connected to the supercharger housing 34. Each branch part 1 has a structure extending vertically so as to sandwich
2 and the passage length of the intake port 27 can be sufficiently ensured, and the charging efficiency of intake air in a low speed range can be increased.

The supercharger 6 has an upper part covered by the collector 11 and
Since the side portions of the supercharger 6 are covered with the respective branch portions 12, heat radiation from the supercharger housing 34 to the outside air is suppressed.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the intake system.

FIG. 3 is a sectional view taken along the line AA in FIG. 2;

FIG. 4 is a side view of the intake system.

FIG. 5 is a configuration diagram of an intake system.

FIG. 6 is a front view of an engine showing another embodiment.

FIG. 7 is a plan view of the intake system.

FIG. 8 is a front view of an engine showing still another embodiment.

FIG. 9 is a plan view of the intake system.

FIG. 10 is a configuration diagram of an intake system.

FIG. 11 is a front view of an engine showing still another embodiment.

FIG. 12 is a front view of an engine showing a conventional example.

[Explanation of symbols]

 Reference Signs List 4 throttle chamber 5 throttle valve 6 supercharger 7 intercooler 10 intake manifold 11 collector section 12 branch section 13 intake valve 16 gear unit 22 cylinder head 27 intake port 31 rotor 32 rotor 33 discharge port 34 supercharger housing 38 bypass suction port 71 bypass Passage 72 Bypass valve

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F02M 35/116 F02M 35/10 102V (72) Inventor Masao Tateno 2388 Omiyacho, Tochigi City, Tochigi Prefecture Tochigi Fuji Industry Co., Ltd.

Claims (9)

[Claims] 1. A supercharger for supercharging intake air by rotation of a rotor, a housing for accommodating a rotor in the supercharger, and an intake manifold for guiding intake air discharged from the supercharger to each cylinder. The intake manifold and the supercharger are respectively arranged between the left and right banks facing the V type, and the intake manifold has a branch portion branching toward each cylinder and a collector portion in which each branch portion gathers.
In a turbocharger for a model engine, a discharge port for discharging intake air is opened at an upper part of a housing of the supercharger, and a collector part communicating with the discharge port is arranged so as to cover at least an upper part of the housing. It is arranged so as to surround at least the side portion of the housing, a part of the intake manifold is defined by the housing, and the intake air discharged from the supercharger is guided around each housing to each cylinder. V-type engine supercharging device. 2. The V-type engine according to claim 1, further comprising a gear device for transmitting power of the engine to the supercharger, wherein a collector portion is arranged so as to cover at least an upper portion of the gear device. Supercharging device. 3. A supercharger for a V-type engine according to claim 1, wherein said intake manifold is formed by pressing a metal plate. 4. The supercharger for a V-type engine according to claim 3, wherein a housing of the supercharger is formed by casting, and a sheet metal intake manifold is cast into the housing. 5. The supercharger for a V-type engine according to claim 1, wherein the branch portions connected to the left and right banks cross each other. 6. The system according to claim 1, further comprising a bypass valve that opens both a discharge port and a bypass suction port of the supercharger in the collector section, and opens and closes the bypass suction port according to engine operating conditions. 5
The supercharging device for a V-type engine according to any one of the above. 7. The turbocharger according to claim 1, further comprising a throttle valve for restricting intake air sucked into the supercharger, a throttle chamber accommodating the throttle valve, and the throttle chamber connected to the supercharger. 7. The supercharging device for a V-type engine according to any one of 6. 8. An intercooler for promoting heat exchange between the intake air discharged from the supercharger and the outside air is disposed above the supercharger, and communicates between a discharge port and a suction port of the supercharger. 8. A bypass passage for distributing air flow is provided, the intake manifold includes left and right collector portions where each branch portion is gathered, and the bypass passage is arranged between the collector portions. A supercharger for a V-type engine according to one of the above aspects. 9. The V according to claim 1, wherein the intake manifold is formed integrally with a housing of a turbocharger, and the intake manifold is fastened to an engine body.
Type engine supercharger.