JP3525561B2 - Cooling system for turbocharged engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION The present invention relates to a turbocharged engine for cooling.
The present invention relates to a cooling device that is to be replaced. [0002] 2. Description of the Related Art In general, an engine is mounted under a floor panel of a vehicle interior.
Gin room is formed and engine is placed there
In a loose cab-over type vehicle, the engine
The radiator is located at the front end of the
Radiator heated by exchanging heat with engine cooling water at the eta
The wind passing through the engine room flows into the engine room and
There is a problem that the heat is easy to stay. Therefore, conventionally, this type of engine cooling device
As disclosed in, for example, JP-A-6-16053.
Like the cab-over type vehicle at the front end of the engine room
A scavenging fan is placed behind a radiator,
Cooling air is blown to the engine side by a fan,
Some are known to scavenge a room. [0004] By the way, the above conventional art
Place the scavenging fan in the engine room
Cooling, usually blown by the scavenging fan
A scavenging fan to efficiently direct wind to the entire engine
Position matches the left and right center position of the engine in front of the engine
It is assumed to be the position where it was obstructed. However, the engine is mounted on the vehicle in the front-rear direction.
Mounted in a so-called vertical state with cylinder rows arranged
The exhaust manifold and its
The exhaust pipe connected to the
Align the scavenging fan with the left and right center positions of the engine.
Exhaust manifold that becomes hot when placed in a different position
And the exhaust system such as the exhaust pipe cannot be cooled efficiently.
Good control of exhaust heat in the engine room
It will be difficult. In addition, the engine is installed vertically as described above.
In a four-wheel drive vehicle, part of the output of the transmission
It is transmitted to the front wheel differential via the side propeller shaft,
This front propeller shaft is used for the engine exhaust manifold.
The layout is arranged so that it passes under the hold.
Installed on the propeller shaft.
Coupling is heated by the exhaust manifold
The problem that the sealed grease inside is easily deteriorated by heat
Occurs. [0007] Further, a supercharger for compressing intake air and supercharging is provided.
Engine, the turbocharger heats up as it operates.
The intake system is heated by heat radiation from the turbocharger
There is also the problem of being adversely affected. [0008] The present invention has been made in view of the above points.
The purpose is, as described above, in the engine room
The engine with a turbocharger is arranged vertically,
If a scavenging fan is installed in the
By improving the installation position, the cooling air generated by the scavenging fan
The exhaust system to the exhaust system of the engine
Cools down and keeps the heat in the engine room cool
To do it. Another object of the present invention is to provide a vertical
If a turbocharger is located on one side of an engine
The heat influence of the intake passage due to the heat radiation of the turbocharger.
To control. [0010] The above object is achieved.
Therefore, according to the first aspect of the present invention, the engine in the vertical
The scavenging fan to the exhaust system side
Arranged. [0011]Specifically, thisIn the invention, before the vehicle
The cylinder row is arranged in the rear direction and mounted, and forward,
Send cooling air to the engine side to scavenge the engine room
A scavenging fan is arranged to compress and supercharge the intake air.
A turbocharged engine equipped with a turbocharger is assumed. AndExhaust manifolds on one side of the engine
An exhaust system including a hold and an exhaust pipe is arranged. Also,D
For a vertical plane extending in the front-rear direction through the engine output shaft
Left and right sideAnd on the exhaust system sideOff the scavenging fan
And place it. Further, on the scavenging fan side with respect to the vertical plane.
When the blower is located on the front side and the turbine is
Is located on the rear side. Further, a scavenging fan is provided for the vertical plane.
An intake passage on the upstream side of the turbocharger is
The exhaust pipe is located rearward from the turbine position of the turbocharger.
It is arranged to extend. [0015] Further, below the turbocharger, a vehicle
The front propeller shaft, which is drivingly connected to the front wheels, is
Arrange them vertically. [0016] According to the above construction, according to the first aspect of the present invention, the supercharging is performed.
Engine arranged in the vehicle in a cylinder row in the front-back direction
At least it is mounted vertically and the output shaft of this engine
Scavenging fan against a vertical plane
Offset to the exhaust system side including the exhaust manifold and exhaust pipe
This scavenging fan is
Closer to the exhaust system side of the engine as much as
The exhaust system such as the exhaust manifold and exhaust pipe.
Cooling air can be efficiently cooled by cooling air from
Exhaust heat in the gin room can be suppressed. Further, the exhaust system of the engine is scavenged as described above.
4 wheels because it can be cooled efficiently by the cooling air of the fan
In a driven vehicle, the front propeller shaft is
Layout that passes through the lower side of the exhaust system
The coupling of the propeller shaft depends on the exhaust system.
The grease inside can be reduced
Can effectively prevent thermal degradation of. [0018]further,Front and rear through the output shaft of the engine
Turbocharger on the scavenging fan side with respect to the vertical plane
With the blower on the front and the turbine on the back
The exhaust pipe of the engine is
This turbine is arranged to extend rearward from the turbine position.
-The front propeller shaft is almost above the turbocharger
The turbo charger
It is arranged to extend rearward from the turbine position of the feeder
Propeller shuff on the front side using the arrangement structure of the exhaust pipe
Can be arranged and the layout can be simplified.
Wear. [0019] Embodiments of the present invention will be described below with reference to the drawings.
I do. FIGS. 1 and 2 show an embodiment according to the present invention.
1 shows a cooling device for a charged engine. These FIGS. 1 and 2
Wherein 1 is the body of a cab-over type four-wheel drive vehicle,
Reference numerals 2 and 2 denote longitudinally extending left and right sides of the lower portion of the vehicle body 1.
The surface-shaped side frame 3 forms the floor of the cabin R.
The floor panel 4 is upward from the front end of the floor panel 3.
The partition wall panel that stands up and the space below the floor panel 3
And the space in front of the partition panel 4 communicates with each other
Re. 5 is an engine in front of the partition panel 4
The hood that opens and closes the compartment Re, in front of the upper surface of the vehicle body 1
Form an end. 6 has a lower end at the upper end of the partition panel 4
It is an assembled front window glass. The vehicle body 1 has the floor panel 3
Four cylinders 9, 9, ... in the lower engine room Re
In-line four-cylinder diesel engine 8 with
It is equipped with. That is, the left of the front of the floor panel 3
The right center is raised in a saddle shape.
Diesel engine in space (engine room Re) in 3a
The gin 8 extends the row of cylinders 9, 9, ... in the longitudinal direction of the vehicle body.
Arranged and housed. As shown in detail in FIG.
In addition, this diesel engine 8 has each cylinder 9
Two intake ports opened and closed by intake valves (not shown)
, Opened and closed by exhaust valves (not shown)
One exhaust port 11 and fuel injection nozzle 17
A sub-chamber 12 is provided.
The air ports 10 and 10 are located on the right side of the engine 8 and exhaust ports.
Conversely, the air ports 11 are opened on the left side of the engine 8 respectively.
Has been spoken. Also, on the right side of the engine 8, each of the above
Intake manifold connected to intake ports 10 and 10 of cylinder 9
A manifold 14 is disposed on the left side, and the cylinders 9 are exhausted.
The exhaust manifold 15 connected to the air port 11
Each is attached. Furthermore, the right side of the engine 8, that is, the intake
The engine 14 is synchronously driven on the manifold 14 side.
A fuel injection pump 18 is attached,
The pump 18 is high in the fuel injection nozzle 17 of each cylinder 9.
Connected through a pressure pipe 19,
Fuel is pressurized by the fuel injection pump 18 at the synchronized timing
The high-pressure fuel is supplied from the fuel injection nozzle 17 to each cylinder.
9 is supplied to the sub chamber 12 by injection. On the other hand, the left side of the engine 8, that is, the exhaust manifold
On the hold 15 side, intake air is compressed by exhaust energy
The turbocharger 21 is mounted. This supercharge
Machine 21 is attached to the collecting part of the exhaust manifold 15
The turbine 23 and the turbine
Rotationally connected to bin 23 via turbine rotation shaft 25
With blower 24 (compressor)
Exhaust gas discharged from 8 is passed through an exhaust manifold 15
And introduced into the housing 22 from an exhaust inlet (not shown).
To rotate the turbine 23, and then the exhaust outlet (shown in FIG.
Without discharging) from the housing 22 through the
The blower 24 is rotationally driven by the rotation of the
Suction through the intake port (not shown)
To compress the air and discharge it from the intake outlet (not shown)
are doing. And, the above-mentioned turbine rotation shaft 25 is
The blower 24 is disposed in front of the supercharger 21.
Side and the turbine 23 on the rear side.
You. As shown in FIG. 1 and FIG.
8, in front of the engine room Re, specifically,
Extends in the front-rear direction through the output shaft (not shown) of the engine 8
Heat exchange of engine cooling water with air on the vertical plane P
Radiator 27 for cooling by cooling
The radiator 27 has a radiator fan
28 is attached. 27a is a radiator 27
And a radiator hose connecting the engine and the engine 8. The rear side of the radiator 27
At a position slightly offset to the left of the vertical plane P,
Intercooler 29 for cooling intake air compressed by feeder 21
Has its lower end slightly lower than the lower end of the radiator 27
It is arranged and supported in a backward inclined state. That is,
The ra 29 is located below the radiator 27 and the turbocharger.
It is arranged below 21. This intercooler 2
Reference numeral 9 denotes an intake port 29a on the left side of the upper surface,
An outlet 29b for intake air is provided on the right side. Ma
The intercooler duct 3 is located on the front of the intercooler 29.
0 is integrally attached. This duct 30
It is a square tube that covers the entire front surface of the tacooler 29,
Spreads in a tapered shape in the left-right direction toward the front side, and its front end
The opening is on the left and right sides with dimensions approximately the same as the left and right width of the radiator 27.
Opening, which is located below the radiator 27.
The lower side without being sucked into the radiator 27
The flowing air is sucked into the intercooler duct 30 and
Introduce to the tacooler 29, so that the intercooler 29
The air in the space in front of the radiator 27 is introduced to
It is designed to pass backward. On the right side of the vertical plane P,
The upstream fresh air duct that extends in the front-rear direction
In this upstream fresh air duct
33 and a downstream fresh air duct 35 described later
An introduction-side intake passage 31 is formed. Upstream freshness
The front end of the intake side intake passage 31 in the air duct 33 is
An intake inlet 32 located on the right side of the upper end of the radiator 27;
The intake of the engine 8 from the intake port 32
(Air) is inhaled. Upstream fresh
The air duct 33 extends rearward while bending downward,
The rear end is the right side (outside) of the right side frame 2
The air clamp attached and fixed at the front and rear position corresponding to the engine 8
The air cleaner is connected to the inlet of the
The intake air is filtered and cleaned at the nozzle 34. Further, at the outlet of the air cleaner 34,
The upstream end of the upstream fresh air duct 35 is connected.
You. This downstream fresh air duct 35 is connected to the engine
8 to the left side of the vehicle body 1
Bent to the side and extended to the front near the left side of the supercharger 21
Afterwards, it bends in a U-shape from the right to the rear, and its downstream end is
Intake inlet in housing 22 of turbocharger 21
(The blower 24 side) and the air cleaner 34.
The intake air purified by the
Through the supercharger 21 for compression
You. The housing 22 of the turbocharger 21
In the intake outlet, there is an intake passage 37 on the intercooler inlet side.
The upstream end of the upstream intake pipe 38 having the inside is connected.
The upstream intake pipe 38 is located at a position on the left side of the vertical plane P.
It is arranged to extend backward. That is, upstream
The side intake pipe 38 has a left side frame as it goes to the front side.
To the right side (inside the vehicle body 1) from the lower side of the
(Front end) is the entrance on the upper left side of the intercooler 29
29a, which is compressed by the supercharger 21 to increase the temperature.
The suctioned intake air is sucked into the intercooler inlet side in the upstream intake pipe 38.
The air is supplied to the intercooler 29 through the air passage 37 for cooling.
Like that. The outlet 2 on the right side of the upper surface of the intercooler 29
9b has an intercooler outlet side intake passage 39 inside
The upstream end of the downstream intake pipe 40 is connected, and the downstream intake
The tube 40 is located at the right side of the vertical
Left side of air duct 33 (inlet-side intake passage 31)
Extending in the front-rear direction on the position, that is, on the side near the vertical plane P
Are arranged as follows. That is, the downstream side intake pipe 40
It extends almost linearly toward the rear side, and its downstream end (front end)
After bending upward, the intake manifold on the right side of the engine 8
Connected to the gathering section (intake inlet) of the
The intake air cooled by the tacooler 29 is
Intercooler outlet side intake passage 39 and intake manifold
The power is supplied to the engine 8 through the power supply 14. On the other hand, the housing of the turbocharger 21
The upstream end of the exhaust pipe 42 is connected to the exhaust outlet at 22.
The exhaust pipe 42 is connected to the turbine 23 of the turbocharger 21.
Is arranged to extend rearward and downward from the position. Further, an engine room in front of the engine 8 is provided.
In the Re, the upstream intake pipe 38 (intercooler inlet) is provided.
Side intake passage 37) and downstream side intake pipe 40 (intercooler outlet)
Mouth-side intake passage 39), that is, the vertical plane P
The left side (the side where the exhaust manifold 15 and the exhaust pipe 42 are arranged,
Or on the same side as the offset side of intercooler 29)
Cooled to the engine 8 side at a position offset by the distance D
Electric fan that blows wind to scavenge engine room Re
Scavenging fan 44 comprising left and right side frames 2 and 2
It is supported by. This scavenging fan 44 is
Above the cooler 29 and below the turbocharger 21
And its axis of rotation rises toward the rear
It is inclined forward. As shown in FIG. 1 and FIG.
In addition, the rear of the engine 8 is changed via a clutch 46.
It has a speed gear 47 and a center differential (not shown) behind it.
The front and rear wheel power distribution device 48 is connected to
The front and rear wheel power distribution device 48
Extends rearward along a vertical plane P on the engine output shaft
Rear propeller shaft (not shown) and front and rear wheel power
The position on the left side of the vertical plane P from the distribution device 48 is set in the forward direction.
And the front propeller shaft 50
The rear propeller shaft is connected via a rear differential (not shown).
Front wheel propeller shaft 50
Drive-coupled to the front wheels W via the Todiff 51
You. And the front side propeller shaft 50 is
The turbocharger 21 is arranged under the turbocharger 21 with the
Is placed. Also, this front side propeller shaft
Reference numeral 50 denotes a position substantially directly below the turbocharger 21 in the axial direction.
Later, it is split into two parts, and the front and rear parts are filled with grease.
Are connected by the coupling 52. FIG.
Inside, B is a battery. Therefore, in the above embodiment,
When the gin 8 is operating, the intake air (air) is
From the upstream fresh air duct 33 on the right side of the vehicle body 1.
The air is sucked into the inlet side intake passage 31 and the downstream end thereof is air-cleaned.
It flows into the nozzle 34 and is cleaned. After that, intake is engine
Downstream after turning on the left side of the vehicle body 1 after passing through the rear side of the
Enters the intake side intake passage 31 in the fresh air duct 35
Therefore, the turbocharger 21
From the front intake port into the housing 22 of the
It is compressed by the lower 24. The intake air after this compression is supplied to the supercharger 21.
After exiting from the intake outlet of the housing 22, the left side of the vehicle body 1
Intercooler inlet side in upstream intake pipe 38 extending forward
Enters the intake passage 37 and is at the front end of the engine room Re.
After flowing into the intercooler 29 through the intake port 29a,
Be rejected. The intake air after the cooling is the intake air of the intercooler 29.
After exiting from the exit 29b, the right side of the vehicle body 1 extends rearward.
In the intercooler outlet side intake passage 39 in the flow side intake pipe 40
The intake manifold on the right side of the engine 8 at the downstream end
Enter 14. After this, two intakes are given to each cylinder 9
Inhaled through ports 10 and 10 and compressed, the compression
Fuel is injected from the fuel injection nozzle 17 into the intake air to ignite fuel
Bake. On the other hand, the combustion of fuel in each cylinder 9
The exhaust gas generated by the
From the exhaust manifold 15 on the left side of the engine 8
From the exhaust inlet of the turbocharger 21 to the housing 2
2 to rotate the turbine 23. This turbine
Exhaust gas after being subjected to rotation of 23
Is discharged to an exhaust pipe 42 through an exhaust outlet. During the operation of the engine 8,
When the scavenging fan 44 is operated and the cooling air flows to the rear side (the engine 8
Side), and the cooling air blows the engine room Re.
The inside is scavenged and cooled. At this time, the engine 8 is
The cylinder row is arranged in the front-rear direction of the vehicle body 1 and
Intake manifold 14 and exhaust manifold on the left
In a vertical position so that
And extends in the front-rear direction through the output shaft of the engine 8.
The scavenging fan 44 is located on the left side of the engine 8 with respect to the vertical plane P.
Exhaust manifold 15, turbocharger 21 and exhaust
Since it is arranged offset to the trachea 42 side,
Scavenging fan 44 is offset to the left side of vehicle body 1.
Minute, the exhaust manifold 15 of the engine 8, the supercharger 21 and
Closer to the exhaust pipe 42 and the high temperature
Heat generated by the cooling air from the scavenging fan 44
Therefore, it is possible to efficiently cool the engine room R
Exhaust heat in e can be suppressed. Also, as described above, the exhaust manifold
Of the scavenging fan 4, the supercharger 21 and the exhaust pipe 42
Four-wheel drive because it is efficiently cooled by 4 cooling air
The front propeller shaft 50 in the car is the engine
8 placed under the exhaust manifold 15
Out of the propeller shaft 50
The coupling 52 is connected to the supercharger 21 or the exhaust manifold 15.
Heating can be reduced by the
The heat deterioration of the base can be effectively prevented. Further, one of the intake passages on the upstream side of the supercharger 21 is provided.
Part, that is, the introduction side in the upstream fresh air duct 33
The intake passage 31 is disposed on the right side of the vehicle body 1, and
The exhaust manifold 15, the supercharger 21,
Since the exhaust pipe 42 is disposed on the left side of the vehicle body 1,
Manifold 15, supercharger 21, exhaust pipe 42 and upstream
Above the inlet side intake passage 31 in the fresh air duct 33
The flow side (the intake passage upstream of the turbocharger 21) is separated
And the intake passage on the upstream side of the supercharger 21
Release of the exhaust manifold 15, the supercharger 21, and the exhaust pipe 42
Heat can be suppressed by receiving heat, and the supercharger 21
It is possible to reduce the influence of heat on the flow-side intake passage. Further, the intercooler 29 performs the scavenging operation.
Offset on the left side of the body 1 same as the fan 44
In addition, the intercooler 29
The air in the space in front of the radiator 27 is introduced through the
After the air has been used to cool the compressed intake air after supercharging,
Let it pass from the tacooler 29 to the rear of the radiator 27
The temperature of the air passing through the intercooler 29 is
Lower than the air that has passed through the
Air can be guided to the scavenging fan 44 and used as cooling air.
You. As a result, the intercooler 29 becomes the radiator 27
And the radiator 2
Low-temperature air that does not pass through 7 is introduced into intercooler 29
To improve the cooling performance,
Exhaust manifold 1 by cooling air from air fan 44
5. In cooling the supercharger 21 and the exhaust pipe 42,
Cooling can be further enhanced by low-temperature cooling air.
it can. Further, the air pump is located above the intercooler 29.
The turbocharger 21 is arranged, and the scavenging fan 44
Above the turbocharger 29 and below the turbocharger 21
In a forward tilted state so that the rotation axis rises toward the rear
Air that has passed through the intercooler 29
The turbocharger by smoothly sucking air into the scavenging fan 44
21 and thus the scavenging fan 44
The turbocharger 21 etc. with low temperature cooling air from
Cooling effect can be enhanced. In addition, through the engine output shaft,
On the left side of the extending vertical plane P, the suction side of the intercooler
An upstream intake pipe 38 having an air passage 37 is also
The upstream fresh air is located at a position away from the vertical plane P.
The introduction-side intake passage 31 in the duct 33 is further on the same right side.
At a position close to the vertical plane P,
The downstream intake pipes 40 having the air passages 39 are respectively front and rear.
Are arranged so as to extend substantially parallel to each other in the direction
Inlet air intake passage in the upstream fresh air duct 33
Road 31, intercooler inlet side intake passage 37 and intercooler
The three passages of the intake passage 39 on the outlet side of the
It can be arranged in a compact layout within
The intercooler inlet side intake passage 37 and the intercooler outlet
The above-described cleaning is performed by making good use of the space between the
An air fan 44 can be provided. In addition, each of the intake passages 31, 37, 39
Is the engine 8 and engine engine behind the engine room Re.
Since it extends between the front position of the
Lengthens and cools the intake air while flowing through them
As a result, the temperature rise of the intake air can be suppressed. Each cylinder 9 has two intake valves.
Intake port 1 on the right side of the sub-chamber diesel engine 8
0, 10 are open and intake manifold 14 is installed
On the other hand, an exhaust port 11 is opened on the other side to exhaust air.
The air manifold 15 is attached.
The fuel injection pump 18
Are arranged, and thus the left and right sides of the engine 8 are
Intake and exhaust ports 10 and 11 are allocated to the side
Diesel engine with sub-chamber with multi-valve intake structure
The fuel injection pump 18 is arranged using the structural features of FIG.
Can be The scavenging fan 44 has a rotation axis center.
It is arranged in a forward leaning state so as to rise backward.
Therefore, the scavenging fan 44 in this inclined state is intercooled.
Not only the air after passing through 29 but also the air below the scavenging fan 44
And the intercooler 29
Can be reduced. Further, the turbocharger 21 is a turbine
The rotation shaft 25 is disposed so as to extend in the front-rear direction.
Since the lower 24 is disposed on the front side of the vehicle body 1,
Intake air from the scavenging fan 44
Cooled effectively by cooling air. In addition, the supercharger 21
Of the engine 8 is located on the rear side,
2 is disposed so as to extend from the rear of the supercharger 21 to the rear side.
Therefore, the turbine 23 of the supercharger 21 which is a heat generating portion
And the exhaust system is located on the rear side to reduce the heat of exhaust heat.
Can be reduced. Furthermore, around the turbocharger 21
It can simplify the layout of the intake system and the exhaust system
You. The above turbocharger 21 is provided below the turbocharger 21.
Front side propeller shaft 50 almost vertically overlapped
The turbine of the turbocharger 21
23, an exhaust pipe 42 arranged to extend rearward from
The front propeller shaft 50 is arranged using the
And the layout can be facilitated. The intake / exhaust system of the engine 8 and the turbo
Feeder 21, each intake passage 31, 37, 39, intercooler
29, the scavenging fan 44, etc.
The arrangement can be reversed. In the above embodiment, the turbocharger is a turbocharger.
Although it is assumed that the machine is a turbocharger 21, a mechanical supercharger must be adopted.
It is also possible to enhance the cooling performance of the scavenging fan 44
Can be. Further, the above embodiment is a diesel engine
Cooling system, but for other types of engines
The same operation and effect can be obtained. [0050]【The invention's effect】 As described above, claim 1 Invention of
According to this, the cylinder rows are arranged in the vehicle
Mounted, Exhaust manifold on one side
Exhaust system including exhaust pipe arrangedEngine with turbocharger
Blow cooling air in front of the engine to scavenge the engine room
In a cooling device having a scavenging fanSweep
Air fan extending in the front-back direction through the engine output shaft
Offset to the exhaust system side with respect to the vertical plane
And a turbo on the scavenging fan side with respect to this vertical plane.
Position the turbocharger with the blower at the front and the turbine at the rear.
And placeOpposite to scavenging fan for vertical plane
The intake passage on the upstream side of the turbocharger is located on the
Pipes extend from the turbocharger turbine to the rear
The front propeller for the front wheels below the turbocharger.
The rashaft is placed almost vertically
AndThe exhaust system of the engine is cooled by cooling air from the scavenging fan.
And efficiently cool the exhaust heat in the engine room
And the CFCs of four-wheel drive vehicles
G propeller shaft passes under the exhaust system of the engine
Even with the layout arranged, the propeller shuff
Reduce the heating of the coupling by the exhaust system
To prevent thermal deterioration of the sealed grease inside the coupling.
Can be planned. Moreover,Turbocharger turbine
Flow using the arrangement of exhaust pipes extending rearward from the
The propeller shaft on the
Can be facilitated.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing an embodiment of the present invention. FIG. 2 is a side view showing an embodiment of the present invention. FIG. 3 is an enlarged plan view showing a diesel engine and a peripheral portion thereof. DESCRIPTION OF SYMBOLS 1 Body 2 Side frame 8 Diesel engine 9 Cylinder 12 Sub chamber 14 Intake manifold 15 Exhaust manifold 18 Fuel injection pump 21 Turbocharger 23 Turbine 24 Blower 25 Turbine rotating shaft 27 Radiator 29 Intercooler 31 Inlet-side intake passage 32 intake inlet 37 intercooler inlet side intake passage 39 intercooler outlet side intake passage 42 exhaust pipe 44 scavenging fan 50 front side propeller shaft 52 coupling P vertical plane R cabin Re engine room W front wheel

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-301528 (JP, A) JP-A-4-252820 (JP, A) JP-A-7-61247 (JP, A) JP-A-4- 262018 (JP, A) JP-A-7-112622 (JP, A) JP-A-7-81439 (JP, A) JP-A-6-16053 (JP, A) Japanese Utility Model Application Showa 60-175864 (JP, U) Japanese Utility Model Application No. 3-114425 (JP, U) Japanese Utility Model Application Sho 59-39219 (JP, U) Japanese Utility Model Application Sho 59-39218 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60K 11/04 B60K 13/02 F01P 5/02 F02B 29/04 B62D 25/08

Claims (1)

(57) [Claims] [Claim 1] A scavenging fan that is mounted on a vehicle with a row of cylinders arranged in the front-rear direction and that blows cooling air to the engine side to scavenge an engine room is disposed in front of the vehicle. In a turbocharged engine equipped with a turbocharger that compresses and supercharges intake air , an exhaust manifold and an exhaust pipe are provided on one side of the engine.
An exhaust system including the scavenging fan, the scavenging fan being disposed on one side of the left and right sides of a vertical plane extending in the front-rear direction through the engine output shaft and offset to the exhaust system side, and the scavenging fan side with respect to the vertical plane. The turbocharger is arranged so that the blower is located on the front side and the turbine is located on the rear side.An intake passage on the upstream side of the turbocharger is arranged on the side opposite to the scavenging fan with respect to the vertical plane, and the exhaust gas of the engine is provided. The pipe is disposed so as to extend rearward from the turbine position of the turbocharger, and a front propeller shaft that is drivingly connected to a front wheel of the vehicle is substantially vertically overlapped below the turbocharger. A cooling device for a supercharged engine, wherein