JPS63270230A - Cooling and exhausting structure for vehicle - Google Patents

Abstract

PURPOSE:To prevent the exhaust supplied from a cooling fan from being returned to an operator side by constituting an exhaust port so that the exhaust is introduced in the direction inclined aslantly forward by 30-75 deg. on the outside of a bonnet along the traveling direction of a vehicle. CONSTITUTION:A plurality of exhaust ports 26 and 26 are formed at least on one side part corresponding to a cooling fan 15 on a bonnet 2, e.g., on the both side parts. Further, at the opened edges on the inner surfaces of these exhaust ports 26 and 26, each louver 27 which is inclined by an angle alpha, namely 30-75 deg. towards aslantly front direction on the outside part of the bonnet 2 along the traveling direction 13 is installed, and these exhaust ports 26 and 26 are opened toward the front part of front wheels W.

Description

Detailed Description of the Invention A0 Object of the Invention (1) Industrial Application Field The present invention provides a radiator, a cooling fan, and an engine installed in an engine room defined by a bonnet in order from the front side along the vehicle running direction. This invention relates to a cooling and ventilation structure for a vehicle in which a main body is housed and a bonnet is provided with an exhaust port for a cooling fan.

(2) Prior art Conventionally, such a structure has been proposed, for example, in U.S. Pat.
It is known from the publication no.

(3) Problems to be Solved by the Invention However, in the conventional system described above, the exhaust air from the cooling fan is discharged from both sides of the bonnet in a direction perpendicular to the direction of travel of the vehicle. Therefore, when natural wind blows from the front of the vehicle, relatively high-temperature exhaust air is returned to the operator's side on the driver's seat, which may adversely affect the operator's environment.

SUMMARY OF THE INVENTION Accordingly, a first object of the present invention is to provide a cooling system for a vehicle that can avoid having an adverse effect on the operator's environment due to exhaust air discharged from a cooling fan to the outside of the hood.
The purpose is to provide a ventilation structure.

By the way, if the air is exhausted only outward from both sides of the bonnet, if there is a person on the side of the vehicle, the exhaust air may hit that person and make them feel uncomfortable, so the speed of the air exhaust should be reduced. (It is conceivable to exhaust air from the top of the bonnet, but in this case as well, it is necessary to prevent the exhausted air from having a negative impact on the operator's environment.

Therefore, a second object of the present invention is to provide a cooling system for a vehicle that not only achieves the first object but also prevents the exhaust air discharged from the top of the hood from adversely affecting the operator's environment. The purpose is to provide a ventilation structure.

Structure of the B0 Invention (1) Means for Solving Problems According to the present invention of cylinder 1, the exhaust ports provided on both sides of the bonnet are arranged diagonally forward by 30 mm on the outside of the bonnet along the running direction of the vehicle. ~
It is configured to direct the exhaust air in a direction inclined by 75 degrees.

According to the second aspect of the present invention, in addition to the configuration of the first aspect, the exhaust port provided at the top of the bonnet is tilted diagonally upward by 0 to 30 degrees toward the front in the driving direction. Constructed to guide exhaust air.

(2) Effect According to the configuration of the first invention described above, the exhaust air from the cooling fan is directed diagonally forward by 30° on the outside of the bonnet along the running direction.
Since the exhaust air is discharged at an angle of ~75 degrees, it is possible to prevent the exhaust air from returning to the operator side as much as possible, thereby avoiding any negative impact on the operator's environment. Contamination caused by carbon in the wind is prevented as much as possible.

Further, according to the configuration of the second invention, the exhaust air is discharged diagonally upward from the top of the bonnet toward the front in the driving direction in a range of 0 to 30 degrees, so that in addition to the effect of the first invention, Therefore, it is possible to prevent the exhaust air discharged from the upper part of the bonnet from being returned to the rear and adversely affecting the environment of the operator.

(3) Example Hereinafter, an example in which the present invention is applied to a riding tractor will be explained with reference to the drawings. First, in FIGS. 1 and 2, the front part of the vehicle body 1 of the riding tractor T has
A bonnet 2 defining an engine room 3 is provided, and a seat 5 is provided at the rear of the vehicle body 1 for an operator who operates a steering wheel 4 etc. disposed approximately in the center of the vehicle body 1. .

Inside the engine room 3, there is an engine body 7 that constitutes a water-cooled engine 6, an air cleaner 8, and an intake manifold 9.
, the exhaust manifold 10 etc. are fixedly arranged, and
An exhaust muffler 11 connected to the exhaust manifold 10 and a tail vibe 12 connected to the exhaust muffler 11 are arranged.

Further, in the engine room 3, a radiator 14 that circulates cooling water between the engine body 7 and the engine body 7 is fixedly arranged in front of the engine body 7 along the traveling direction 13 of the tractor T. A cooling fan 15 is fixedly arranged.

Referring also to FIG. 3, the cooling fan 15 is a double electric type centrifugal fan, and is provided in a casing 18 having suction ports 16 and 17 on the radiator 14 side and the engine body 7 side, and has a plurality of cooling fans on both front and back sides. A rotating plate 21 having two fins 19 and 20 is housed and arranged, and a rotating shaft 22 coaxially fixed to the rotating plate 21 is arranged concentrically within the suction port 17 and is rotatable in the engine body 7. Supported. Moreover, the power from the engine body 7 is transmitted to this rotating shaft 22.
The signal is transmitted via a transmission means such as a transmission belt 23.

When the cooling fan 15 is in operation, air is sucked into the engine room 3 from the inlet 33 provided at the front of the bonnet 2, passes through the radiator 14, is sucked into the inlet 16, and cools the radiator 14. At the same time, air from the rear of the engine room 3 is sucked into the suction port 17.

The air cleaner 8 and exhaust muffler 11 are connected to the engine body 7
A plurality of intake ports 24 are arranged on the rear side of the radiator 14 on both sides of the bonnet 2 corresponding to the air cleaner 8.
．． 24 are provided respectively. Moreover, these intake ports 2
Louvers 25 that are inclined diagonally inward toward the front side along the running direction 13 are arranged in series on the inner opening edges of 4.24.

Further, at least one side of the bonnet 2 corresponding to the cooling fan 15, for example, both sides, is provided with a plurality of exhaust ports 26.
．． 26 are provided respectively. Moreover, these exhaust ports 2
6. The inner opening edge of 26 has an angle α, i.e., 3
Louvers 27 that are inclined by 0 to 75 degrees are installed, so that each exhaust port 26, 26 is opened toward the front of the front wheel W.

In addition, a pair of air guide ducts 28, 29 are connected to both sides of the casing 18 of the cooling fan 15, and extend along both sides of the bonnet 2 in a substantially horizontal direction. The end is located near the pole of the air outlet 26.26.
The outer end portion is formed to be smoothly curved toward the front along the traveling direction 13 in order to smoothly guide the air toward the air outlet 26.26.

In addition, a plurality of louvers 30 are attached to the outer end opening of each wind guide duct 28, 29 to divide the opening into a plurality of vertically. It is arranged to be inclined by β, and the angle β is set to, for example, about 30 degrees at maximum.

Further, in the upper part of the casing 18 of the cooling fan 15, there is provided an air exhaust port 31a that extends upward, passes through the upper part of the bonnet 2, and is inclined diagonally upward at an angle δ, that is, 0 to 30 degrees, toward the front along the running direction 13. A wind guide duct 31 provided at the outer end is connected. Also, casing 18
A wind guide duct 32 extending downward is connected to the lower part of the
The lower end of the wind guide duct 32 is bent so as to be inclined at an angle T so as to be at a rearward position along the traveling direction 13 as it goes downward, and the angle γ is set at a maximum of about 45 degrees.

A tail pipe 12 connected to the exhaust muffler 11 is bent toward one side of the bonnet 2, and is opened outward through the bonnet 2 near the exhaust port 26 on the one side. That is, the exhaust port 26 along the running direction 13
An exhaust port 34 is bored in the side of the bonnet 2 at a position close to the exhaust port 26 on the rear side of the bonnet 2, and the tail pipe 12 is parallel to the exhaust direction of the exhaust port 26. The bonnet 2 is opened outward from the bonnet 2.

Next, the operation of this embodiment will be explained. When the water-cooled engine 6 is operating, air in the engine room 3 is sucked into the suction ports 16 and 17 of the cooling fan 15 as the cooling fan 15 rotates. .

That is, a part of the air sucked into the engine room 3 from the inlet 33 flows through the radiator 14 and reaches the inlet 16.
The air is drawn into the casing 18 through the suction port 17 and heated at the rear in the engine room 3 by heat radiation from the engine body 7, exhaust muffler 11, and the like. Since the air heated in the engine room 3 is discharged to the outside by the cooling fan 15, the temperature in the engine room 3 can be kept relatively low. Therefore, it becomes possible to arrange the exhaust muffler 11 inside the engine room 3, and it becomes unnecessary to supply air to the air cleaner 8 from the front side of the radiator 14, which may cause hot air to leak from the engine room 3 to the seat 5 side. Since there is no seal, there is no need for a seal, and the layout inside the engine room 3 can be designed economically and rationally.

Moreover, since the intake ports 24, 24 and the exhaust ports 34 are formed in the bonnet 2 on the rear side of the radiator 14, the intake duct of the air cleaner 8 and the tail pipe 12 of the exhaust muffler 11 can be shortened.

The air sucked into the cooling fan 15 is passed through the air guide duct 28.
The air is discharged to the outside from the air outlet 26, 26 through the air guide duct 31, diagonally upwardly from the air outlet 31a through the air guide duct 31, and further downward through the air guide duct 32. Moreover, due to the function of the louvers 27 and 30, the exhaust port 2
The air discharged from 6.26 is discharged diagonally upward and diagonally forward in a range of 30 to 75 degrees, and is discharged diagonally backward from the wind guide duct 32, and is discharged diagonally backward from the air discharge port 31a.
From there, it is ejected diagonally upward and forward in a range of 0 to 30 degrees. By determining the direction of the air discharged from the cooling fan 15 in this way, it is possible to minimize the influence of hot air on the operator's environment when natural wind is blowing from the front, and it is also possible to By exhausting the air, the speed of exhaust air can be appropriately suppressed, and furthermore, the exhaust air from the air guiding duct 32 has the effect of cooling the oil pan 7a in the lower part of the engine body 7.

In other words, according to the inventor's experiments, when the angle α for guiding the exhaust air from the exhaust outlet 26°26 is less than 30 degrees, the exhaust air hits the outer surface of the bonnet 2 and the outer surface of the bonnet 2 is caused by carbon etc. in the exhaust air. If it becomes dirty and the angle α exceeds 75 degrees, there is a strong possibility that the exhaust air will be returned to the rear side and adversely affect the environment for the operator. Moreover, if the exhaust port 26°26 is arranged in front of the front wheel W as in this embodiment, the angle α
By setting the angle between 30 and 75 degrees, the exhaust port 26.26
Since the air discharged from the front wheel W is directed diagonally in front of the front wheel W, hot air can be avoided from directly hitting the front wheel W.
It is also possible to prevent the tires of the front wheels W from turning black and reducing their durability.

Further, when the angle T for guiding the exhaust air from the upper air outlet 31a of the bonnet 2 exceeds 30 degrees, the air outlet 31a
The inventor has confirmed through experiments that there is a high possibility that the exhaust air from the machine will be returned to the operator side.

Incidentally, the exhaust gas of the water-cooled engine 6 discharged from the tail vibe 12 is discharged to the outside at a position close to the exhaust port 26 on one side of the bonnet 2. Therefore, the exhaust gas from the tail vibe 12 is discharged relatively far along with the exhaust air from the exhaust port 26. Therefore, even if a natural wind blows from the front to the rear of the tractor T, the exhaust gas is prevented from adversely affecting the environment of the operator on the seat 5 as much as possible, and comfortable driving is possible.

Effects of the C0 Invention As described above, according to the first invention, the exhaust ports provided on both sides of the bonnet are inclined diagonally forward by 30 to 75 degrees on the outside of the bonnet along the traveling direction of the vehicle. Since the structure is designed to guide exhaust air to It is possible to prevent the outer surface of the air conditioner from being contaminated by carbon, etc. in the exhaust air as much as possible.

According to the second aspect of the present invention, in addition to the configuration of the first aspect, the exhaust port provided at the top of the bonnet is tilted diagonally upward by 0 to 30 degrees toward the front in the driving direction. Since it is configured to guide the exhaust air, it not only achieves the effect of the first invention, but also avoids reducing the speed of exhaust air from both sides of the bonnet and causing discomfort to people on the sides of the vehicle. It is also possible to prevent the exhaust air from the top of the bonnet from having an adverse effect on the operator's environment.

[Brief explanation of drawings]

The drawings show an embodiment in which the present invention is applied to a riding type tractor.
The figure is a cross-sectional plan view of the main part of FIG. 1, and FIG. 3 is an enlarged perspective view of the cooling fan. 2... Bonnet, 3... Engine room, 7...
・Engine body, 13... Traveling direction, 14... Radiator, 15... Cooling fan, 26.31a... Exhaust port, T... Tractor as a vehicle Fig. 3

Claims (2)

[Claims] (1) A radiator, a cooling fan, and an engine body are housed in the engine compartment defined by the bonnet in order from the front side along the direction of vehicle travel, and the bonnet is provided with an exhaust port for the cooling fan. In the ventilation structure, the ventilation openings provided on both sides of the bonnet are located diagonally forward at 30° on the outside of the bonnet along the direction of vehicle travel.
A cooling and exhaust structure for a vehicle, characterized in that it is configured to guide exhaust air in a direction inclined by ~75 degrees. (2) A radiator, a cooling fan, and an engine body are housed in the engine room defined by the bonnet in order from the front side along the direction of vehicle travel, and the bonnet is provided with an exhaust port for the cooling fan. In the ventilation structure, the ventilation openings provided on both sides of the bonnet are located diagonally forward at 30° on the outside of the bonnet along the direction of vehicle travel.
Constructed to direct exhaust air in a direction inclined by ~75 degrees,
A cooling and ventilation structure for a vehicle, characterized in that an exhaust port provided at an upper part of a bonnet is configured to guide exhaust air in a direction inclined diagonally upward by 0 to 30 degrees toward the front in the driving direction.