JP2000130167A - Automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extremely reduce than the past the reverse flow of the air from an electric fan into the opening of a radiator not covered by a shroud and its flow-back to the frontside of the radiator at the idling time of an automobile, in relation to the automobile constituted by arranging a shutter device between a front grille and radiator. SOLUTION: A shutter device 39 is arranged between a front grille 15 and a radiator 19, which has a first shutter 41 for covering the frontside of a shroud area 37A covered by the shroud 25 of the core 37 of the radiator 19 openably/ closably and a second shutter 43 for covering the frontside of the ventilation area 37B not covered by the shroud openably/closably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile,
In particular, the present invention relates to an automobile having a shutter device disposed between a front grill and a radiator.

[0002]

2. Description of the Related Art Conventionally, as an automobile in which a shutter device is disposed in front of a radiator, for example, Japanese Patent Laid-Open No. 6-8852 has been proposed.
Japanese Unexamined Patent Application Publication No. 5 (1999) -2005 is known. FIG. 5 shows an engine room of a conventional automobile. In this engine room, a condenser 2 and a radiator 3 are arranged facing a front grill 1.

[0003] Behind the radiator 3, an engine 4 is disposed horizontally. A transmission 5 is disposed at a lower portion of one side of the engine 4 in the lateral direction. An electric fan 7 is arranged between the radiator 3 and the engine 4 via a shroud 6 that covers the rear surface of the radiator 3. Further, a ventilation port 9 is formed between the engine 4 and an under cover 8 disposed below the radiator 3.

[0004] Then, as shown in FIG.
An opening 11 that is not covered with the shroud 6 is formed on the side of the core 10 opposite to the transmission 5.
In such an engine room, as shown in FIG.
By the operation of the electric fan 7, air from the front grill 1 flows through the condenser 2 and the core 10 of the radiator 3, collides with the engine 4, and then is formed between the undercover 8 and the engine 4. It is discharged from the mouth 9 to the outside.

[0005] As shown in FIG. 7, when the vehicle is running, the traveling wind 12 is positively introduced from the opening 11 not covered by the shroud 6, and the cooling efficiency can be improved.

[0006]

However, in such a conventional engine room, when the vehicle is idling, the exhaust air 13 sucked by the electric fan 7 collides with the engine 4 as shown in FIG. There is a problem that the cooling efficiency is reduced after being reversed and blown back from the opening 11 to the front surface of the condenser 2 or the radiator 3.

Conventionally, as shown in FIG. 8, a pair of electric fans 7, 7 are arranged side by side via a shroud 6 covering a rear surface of a core portion 10 of a radiator 3, and are disposed above the core portion 10. Although a device having an opening 14 not covered by the shroud 6 is known, in such a device as well, as shown in FIG. 9, the exhaust air 13 sucked by the electric fan 7 collides with the engine 4. After turning over, the opening 1
4 blows back to the front of the condenser 2 or the radiator 3, causing a problem that the cooling efficiency is reduced.

The present invention solves such a conventional problem. When the vehicle is idling, air from the electric fan flows back through the opening of the radiator which is not covered by the shroud and is blown back to the front of the radiator. It is an object of the present invention to provide an automobile capable of greatly reducing the above.

[0009]

According to a first aspect of the present invention, there is provided an automobile having a radiator disposed opposite to a front grill, an engine disposed behind the radiator, and a radiator disposed between the radiator and the engine. In an automobile in which an electric fan is arranged via a shroud covering a part of a rear surface of a core portion, a front portion of a shroud area of the core portion of the radiator covered by the shroud is provided between the front grill and the radiator. And a second shutter that opens and closes the front of a ventilation area that is not covered by the shroud.

According to a second aspect of the present invention, in the automobile according to the first aspect, the shutter device closes the second shutter when the vehicle speed is equal to or lower than a predetermined speed, and when the vehicle speed is equal to or lower than the predetermined speed and the radiator is closed. A control means for closing the first shutter when the temperature of the cooling liquid is equal to or lower than a predetermined temperature is provided. According to a third aspect of the present invention, in the automobile according to the second aspect, the control unit is configured to control the first shutter and the first shutter when the vehicle speed is equal to or higher than a predetermined speed and the temperature of the coolant of the radiator is equal to or lower than a predetermined temperature. The second shutter is closed.

According to the first aspect of the present invention, at the time of idling, the second shutter for opening and closing the front of the ventilation area not covered by the shroud is closed, and the air from the electric fan flows back through the ventilation area. This prevents the air from being blown back in front of the radiator. Further, the first shutter and the second shutter are independently opened and closed according to the driving state of the automobile.

In the vehicle according to the second aspect, the control means includes:
When the vehicle speed is equal to or lower than a predetermined speed, the second shutter is closed,
The first shutter is closed when the vehicle speed is equal to or lower than a predetermined speed and the temperature of the coolant of the radiator is equal to or lower than the predetermined temperature. In the vehicle according to the third aspect, when the vehicle speed is equal to or higher than the predetermined speed and the temperature of the coolant of the radiator is equal to or lower than the predetermined temperature, the first shutter and the second shutter are controlled by the control means.
Is closed.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an engine room of an embodiment of the automobile of the present invention. In this engine room, a condenser 17 and a radiator 19 are arranged facing the front grill 15.

An engine 21 is disposed horizontally behind the radiator 19. A transmission 2 smaller than the engine 21 is provided at a lower portion of one side of the engine 21 in the lateral direction.
3 are arranged. An electric fan 27 is arranged between the radiator 19 and the engine 21 via a shroud 25.

The electric fan 27 includes a motor 29 and the fan 3
1. Further, a ventilation port 35 is formed between the engine 21 and the under cover 33 disposed below the radiator 19.

In this embodiment, as shown in FIG. 2, the shroud 25 is disposed so as to cover only a part of the rear surface of the core 37 of the radiator 19. That is, only the portion of the radiator 19 except for the lower portion of the core portion 37 is covered with the shroud 25.
The portion covered with is a shroud region 37A.

The lower part of the core 37, which is not covered by the shroud 25, is a ventilation area 37B. In this embodiment, a shutter device 39 is disposed between the front grill 15 and the condenser 17. The shutter device 39 includes a first shutter 41 that opens and closes the front of a shroud area 37A of the core portion 37 of the radiator 19, and a second shutter that opens and closes the front of a ventilation area 37B that is not covered by the shroud 25. 43
And

Each of the first shutter 41 and the second shutter 43 has a plurality of blade members 45. The first shutter 41 is provided with a first driving device 47 including a motor for opening and closing the blade member 45, and the second shutter 43 is provided with a motor for opening and closing the blade member 45. A second drive 49 is arranged.

FIG. 3 shows a control device 51 that drives the first drive device 47 and the second drive device 49 to automatically open and close the first shutter 41 and the second shutter 43. . The control device 51 is configured by a microcomputer. For example, a vehicle speed and a coolant temperature of the radiator 19 are input to the control device 51 from a microcomputer for controlling the engine 21.

On the other hand, in the memory 51a of the control device 51,
As shown in FIG. 4, the open / close state of the first shutter 41 and the second shutter 43 is stored in advance as a table 53 corresponding to the vehicle speed and the water temperature. Here, the vehicle speed is classified into two ranges, i.e., idling and congestion traveling at a speed of 0 km / h to less than 30 km / h, and medium-high speed traveling at a speed of 30 km / h or more.

The water temperature of the radiator 19 is set to a temperature of less than 90 ° C. where cooling by the radiator 19 is almost unnecessary.
They are classified into two types, that is, a temperature of 90 ° C. or higher that requires cooling by the radiator 19. And the control device 5
The first CPU 51b determines the required open / close state of the first shutter 41 and the second shutter 43 from the table 53 shown in FIG. 4 based on the vehicle speed and the coolant temperature of the radiator 19 that are input. And the first shutter 4
One first driving device 47 and the second shutter 43
To the second driving device 49.

In the above-described automobile, the front grill 15
Between the radiator 19 and the radiator 19
7 shroud area 37 covered by shroud 25
A shutter device 3 having a first shutter 41 that covers the front of A in a freely openable and closable manner, and a second shutter 43 that opens and closes the front of a ventilation area 37B that is not covered by the shroud 25.
9, the second shutter 43 is closed during idling, so that air from the electric fan 27 flows backward through the ventilation area 37B of the radiator 19 that is not covered by the shroud 25 and is forward of the radiator 19. Blowing back can be greatly reduced compared to the related art.

Further, by opening and closing the first shutter 41 and the second shutter 43 according to the driving state of the automobile, it is possible to easily improve the heating performance, reduce the air resistance of the vehicle, and the like. That is, when the water temperature of the radiator 19 is lower than 90 ° C., the first shutter 41 is closed by the control device 51, so that the heating performance in winter can be sufficiently ensured and the radiator ventilation (engine By preventing the vehicle air resistance from increasing due to room ventilation, fuel efficiency can be improved.

Further, in the above-mentioned automobile, the vehicle speed is 30
Km / h or more and the temperature of the coolant of the radiator 19 is 9
When the temperature rises to 0 ° C. or higher, for example, when climbing a hill, the controller 51 opens the first shutter 41 and the second shutter 43, so that the radiator 19 travels to the shroud area 37A and the ventilation area 37B. The wind is guided, whereby the temperature rise of the coolant of the radiator 19 can be effectively suppressed.

In the above embodiment, the ventilation area 3
Although an example in which 7B is formed below the core portion 37 of the radiator 19 has been described, the present invention is not limited to such an embodiment. For example, a ventilation region is formed in the upper portion or the side portion of the core portion. The second shutter may be arranged corresponding to the ventilation area. Further, in the above-described embodiment, the opening degrees of the first and second shutters 41 and 43 are binary values of fully open and fully closed. Heating performance can be improved and vehicle air resistance can be reduced.

[0026]

As described above, in the motor vehicle according to the first aspect, the first shutter is provided between the front grill and the radiator to open and close the front of the shroud area covered by the shroud of the core of the radiator. And a shutter device having a second shutter that can open and close the front of the ventilation area that is not covered by the shroud. By closing the second shutter during idling, air from the electric fan is released. It is possible to greatly reduce backflow in the ventilation area of the radiator which is not covered with the shroud and blown back to the front of the radiator as compared with the related art.

Further, by opening and closing the first shutter and the second shutter according to the driving state of the automobile, it is possible to easily improve the heating performance, reduce the ventilation resistance, and the like.

According to the second aspect of the present invention, the control means closes the second shutter when the vehicle speed is equal to or lower than the predetermined speed, so that the air from the electric fan is covered with the shroud when idling. It is possible to reduce backflow in the ventilation area of the radiator which is not blown back to the front of the radiator. Further, since the first shutter is closed by the control means when the temperature of the cooling liquid of the radiator is equal to or lower than the predetermined temperature, it is possible to prevent a decrease in heating performance.

According to the third aspect of the present invention, when the vehicle speed is equal to or higher than the predetermined speed and the temperature of the coolant of the radiator is equal to or lower than the predetermined temperature, the control means closes the first shutter and the second shutter. As a result, it is possible to easily improve the heating performance, reduce the ventilation resistance, and the like.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an engine room of an embodiment of an automobile of the present invention.

FIG. 2 is a rear view showing the shroud of FIG. 1;

FIG. 3 is a block diagram showing a control device for opening and closing the shutter device of FIG. 1;

FIG. 4 is an explanatory diagram showing a table stored in a memory of the control device in FIG. 3;

FIG. 5 is an explanatory diagram showing an example of a conventional engine room.

FIG. 6 is a rear view showing the shroud of FIG. 5;

FIG. 7 is an explanatory diagram showing a flow of an engine room in FIG. 5;

FIG. 8 is an explanatory view showing another example of a conventional shroud.

FIG. 9 is an explanatory diagram showing a flow of the shroud in FIG. 8;

[Explanation of symbols]

 Reference Signs List 15 front grille 19 radiator 21 engine 25 shroud 27 electric fan 37 core part 37A shroud area 37B ventilation area 39 shutter device 41 first shutter 43 second shutter 51 control device

Claims (3)

[Claims] 1. A radiator (19) is arranged opposite to a front grill (15), and an engine (21) is arranged behind the radiator (19). The radiator (19) and the engine (21) Between the front grill (15) and the electric motor, wherein an electric fan (27) is arranged via a shroud (25) covering a part of the rear surface of the core part (37) of the radiator (19). Radiator (19)
And a first shutter (4) that opens and closes the front of a shroud area (37A) of the core portion (37) of the radiator (19) covered by the shroud (25).
1) and a ventilation area (37) not covered by the shroud
A motor vehicle comprising a shutter device (39) having a second shutter (43) for opening and closing the front of B). 2. The vehicle according to claim 1, wherein the shutter device (39) closes the second shutter (43) when the vehicle speed is equal to or lower than a predetermined speed, the vehicle speed is equal to or lower than the predetermined speed, and the radiator. When the temperature of the coolant in (19) is equal to or lower than a predetermined temperature, the first shutter (4
An automobile having a control means (51) for closing (1). 3. The vehicle according to claim 2, wherein the control means (51) is configured to control the vehicle speed when the vehicle speed is equal to or higher than a predetermined speed and when the temperature of the coolant of the radiator (19) is equal to or lower than a predetermined temperature. An automobile, wherein the first shutter (41) and the second shutter (43) are closed.