JP2892277B2 - Wind deflector device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind deflector device.

[0002]

2. Description of the Related Art Generally, as shown in FIGS.
A wind deflector 4 for reducing air resistance during high-speed running is provided on a roof 3 of a cab 2 of a vehicle 1 such as a tractor for pulling a trailer or a truck having a box-shaped carrier.

[0003]

However, in the wind deflector 4 as described above, as shown in FIG. 6, when the vehicle 1 is traveling at a high speed, the vehicle 1 receives no traveling wind but only traveling wind. When the yaw angle is 0 °, the window is positioned such that the stagnation point is located at the center of the front side of the window deflector 4 and the area of the stagnation point is minimized, and the Cd value as a drag coefficient representing air resistance is reduced. Since the shape of the deflector 4 is tuned, as shown in FIG. 7, when the vehicle 1 is traveling at high speed, the vehicle 1 receives a cross wind and a synthetic wind with the traveling wind acts on the vehicle 1, and the yaw angle ψ is reduced. When this occurs, the stagnation point moves to the side surface of the wind deflector 4 and the area of the stagnation point becomes large, so that the Cd value increases and the fuel efficiency deteriorates.

The present invention has been made in view of the above circumstances, and provides a wind deflector device capable of suppressing an increase in the Cd value by always keeping the area of a stagnation point to a minimum during high-speed running of a vehicle, and improving fuel efficiency. What you want to do.

[0005]

SUMMARY OF THE INVENTION The present invention provides a wind deflector body disposed on a roof of a vehicle and having a substantially cylindrical skirt portion having a desired radius of curvature formed on a front portion thereof; A wind direction indicator attached to the center of curvature of the skirt portion on the wind deflector body so as to be horizontally swingable in accordance with the wind direction of the combined wind with the wind direction detection, and a turning angle detection for detecting the pointing direction of the wind direction indicator Device, a wedge-shaped member slidably provided along the outer surface of the skirt portion, a driving device for sliding the wedge-shaped member, a vehicle speed detector for detecting a running speed of the vehicle, and a vehicle speed from the vehicle speed detector A control signal for holding the wedge-shaped member at substantially the left and right central portions of the skirt portion is output to the drive device based on the signal when the vehicle is traveling at a low speed, and the vehicle speed from the vehicle speed detector is output. A controller that outputs a control signal to the drive device to slide the wedge-shaped member to an angular position that matches the direction indicated by the wind direction indicator according to an angle signal from the turning angle detector during high-speed running of the vehicle based on the signal. A wind deflector device comprising:

Further, the present invention provides a wind deflector body disposed on a roof of a vehicle and having a substantially cylindrical skirt portion having a desired radius of curvature formed on a front portion thereof, and a combined wind of a cross wind and a traveling wind. A wind direction indicator attached to a center of curvature of the skirt portion on the wind deflector body so as to be horizontally pivotable according to the wind direction of the wind deflector;
A wedge-shaped member attached to the horizontal turning axis of the wind direction indicator via an arm extending in the direction indicated by the wind direction indicator and slidably provided along the outer surface of the skirt portion. It concerns a deflector device.

[0007]

Therefore, in the case of the wind deflector device in which the drive device is controlled by the controller, the influence of the Cd value is small when the vehicle is traveling at a low speed. Therefore, the wind direction is determined based on the vehicle speed signal from the vehicle speed detector. Regardless of the pointing direction of the pointer, the wedge-shaped member is held at substantially the right and left central portions of the skirt portion.

When the vehicle is traveling at high speed, the vehicle receives only the traveling wind without receiving any crosswind, ie, the yaw angle is 0.
In the state of °, the wind direction indicator is oriented in the traveling direction of the vehicle, the wedge-shaped member is held at an angular position coinciding with the direction indicated by the wind direction indicator, and the stagnation point is located at a minute area at the tip of the wedge-shaped member. Therefore, the Cd value decreases.

On the other hand, when the vehicle receives a cross wind when the vehicle travels at a high speed and the combined wind with the traveling wind acts on the vehicle, and a yaw angle occurs, the wind direction indicator moves the yaw angle with respect to the traveling direction of the vehicle. The turning direction of the wind direction indicator is detected by a turning angle detector, and the driving device is driven by a control signal output from a controller in response to an angle signal from the turning angle detector, thereby forming a wedge-like shape. The member slides along the outer surface of the skirt and is held at an angular position that matches the direction indicated by the wind direction indicator, and the stagnation point is located at the minute area at the tip of the wedge-shaped member, as in the case where the yaw angle is 0 °. Position, Cd
The value decreases.

In the case of a wind deflector device in which a wedge-shaped member is directly attached to a horizontal turning shaft of a wind direction indicator via an arm, various detectors, a driving device, a controller, and the like are not provided at all. Regardless, when the wind direction indicator receives the wind and turns horizontally during traveling of the vehicle, the wedge-shaped member moves together, and the direction of the wind direction indicator always coincides with the angular position of the wedge-shaped member. In this case, the stagnation point is located at a small area at the tip of the wedge-shaped member, and the Cd value is reduced.

[0011]

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

1 to 4 show an embodiment of the present invention.
A substantially cylindrical skirt portion 6 having a desired radius of curvature R is formed on a front surface of a wind deflector body 5 disposed on a roof 3 of a cab 2 of the vehicle 1, and the skirt on the wind deflector body 5 is formed. A wind direction indicator 7 such as a weathercock is attached to the center of curvature O of the section 6 so that the wind direction indicator 7 such as a weathercock can be freely turned horizontally in accordance with the direction of the combined wind of the cross wind and the traveling wind. A turning angle detector 9 such as a potentiometer for detecting the direction (yaw angle ψ) of the wind direction indicator 7 with respect to the front-rear direction of the vehicle 1 is attached.

A rotating shaft 10 rotatably supported on the same axial line as the horizontal turning shaft 8 of the wind direction indicator 7 includes:
An arm 12 having a distal end portion penetrating through a slit 11 formed in the skirt portion 6 and protruding to the outside of the wind deflector body 5 is provided integrally, and a wedge-shaped member 13 having a sharpened front end is attached to the distal end of the arm 12. On the rotating shaft 10,
A worm wheel 14 is fitted, and a worm 16 that is rotationally driven by a driving device 15 such as a motor is engaged with the worm wheel 14, and the rotating shaft 10 is rotated.
A rotation angle detector 17 such as a potentiometer for detecting the rotation angle of the rotating shaft 10 (the angular position of the wedge-shaped member 13) with respect to the front-rear direction of the vehicle 1 is attached.

Further, a vehicle speed detector 18 for detecting the traveling speed of the vehicle 1 is provided, and a vehicle speed signal 19 from the vehicle speed detector 18 is provided.
When the vehicle 1 is running at low to medium speeds, a control signal 20 for holding the wedge-shaped member 13 at substantially the right and left central portions of the skirt portion 6 is output to the driving device 15. When the vehicle 1 is running at high speed, a control signal 20 for sliding the wedge-shaped member 13 to an angular position corresponding to the direction indicated by the wind direction indicator 7 according to the angle signal 21 from the turning angle detector 9 is transmitted to the driving device 15.
And a controller 22 for outputting the result to the controller.

The rotation angle signal 23 of the rotating shaft 10 detected by the rotation angle detector 17 is fed back to the controller 22 so that the angular position of the wedge-shaped member 13 is set in the direction indicated by the wind direction indicator 7. The controller 22 outputs the control signal 20 to the driving device 15 until the control signal 20 completely matches.

Next, the operation of the above embodiment will be described.

When the vehicle 1 is traveling at a low speed, C
Since the influence of the d value is small, based on the vehicle speed signal 19 from the vehicle speed detector 18, regardless of the direction indicated by the wind direction indicator 7,
The wedge-shaped member 13 is held at substantially the right and left central portions of the skirt portion 6.

When the vehicle 1 is running at a high speed, FIG.
As shown in the figure, in the state where only the traveling wind is received without receiving any cross wind, that is, in the state where the yaw angle is 0 °, the wind direction indicator 7
Is oriented in the traveling direction of the vehicle 1, the wedge-shaped member 13 is held at an angular position corresponding to the direction indicated by the wind direction indicator 7, and the stagnation point is located at a small area at the tip of the wedge-shaped member 13. Becomes smaller.

On the other hand, as shown in FIG. 4, when the vehicle 1 travels at a high speed, the vehicle 1 receives a cross wind and a combined wind with the traveling wind is generated.
When the yaw angle ψ occurs, the wind direction indicator 7 horizontally turns by the yaw angle ψ with respect to the traveling direction of the vehicle 1, and the direction indicated by the wind direction indicator 7 is determined by the turning angle detector 9. The driving device 15 is driven by a control signal 20 which is detected and output from a controller 22 in response to an angle signal 21 from the turning angle detector 9, and the rotating shaft 10 is rotated by a required angle through the worm 16 and the worm wheel 14. And the wedge-shaped member 1 attached to the rotating shaft 10 via the arm 12
3 slides along the outer surface of the skirt 6, where
A rotation angle signal 23 of the rotation shaft 10 detected by the rotation angle detector 17 is fed back to the controller 22, the wedge-shaped member 13 is held at an angular position that matches the direction indicated by the wind direction indicator 7, and the yaw angle is reduced. As in the case of 0 °, the stagnation point is located at a small area at the tip of the wedge-shaped member 13, and the Cd value is reduced.

Thus, when the vehicle 1 is traveling at high speed,
The area of the stagnation point is always kept to a minimum, and the increase in the Cd value can be suppressed, and the fuel efficiency can be improved.

In the embodiment shown in FIG. 1, the rotation angle signal 23 of the rotating shaft 10 detected by the rotation angle detector 17 is fed back to the controller 22. It goes without saying that only the control signal 20 for driving is output from the controller 22 and the rotation angle detector 17 may be omitted.

FIG. 5 shows another embodiment of the present invention. In the drawing, the portions denoted by the same reference numerals as those in FIG. 1 represent the same components, and the center of curvature of the skirt portion 6 on the wind deflector main body 5 is shown. The wind deflector main body extends horizontally in the direction indicated by the wind direction indicator 7 and passes through a slit 11 formed in the skirt portion 6 on a horizontal swivel shaft 8 of the wind direction indicator 7 which is horizontally rotatably attached to the portion O. 5. An arm 12 protruding outward is provided integrally, and a wedge-shaped member 13 having a sharpened front end is attached to the tip of the arm 12.

In the embodiment shown in FIG. 5, detectors such as a turning angle detector 9, a rotation angle detector 17, a vehicle speed detector 18 and the like, a driving device 15, a controller 22 and the like are not provided at all. Regardless, when the wind direction indicator 7 receives the wind and turns horizontally during traveling of the vehicle 1, the wedge-shaped member 13 also moves together, and always indicates the direction indicated by the wind direction indicator 7 and the wedge-shaped member 13.
When the vehicle 1 travels at high speed, the stagnation point is located at a small area at the tip of the wedge-shaped member 13, and the Cd value is reduced.

Thus, as in the case of the embodiment shown in FIGS. 1 to 4, when the vehicle 1 is running at a high speed, the area of the stagnation point can always be kept to a minimum to suppress the increase of the Cd value. The fuel economy can be improved, and in the case of the embodiment shown in FIG. 5, the turning angle detector 9 and the rotation angle detector 1
7. It is not necessary to provide a detector such as the vehicle speed detector 18 and the like, the driving device 15, the controller 22, and the like, so that the structure can be simplified and the cost can be reduced.

It is to be noted that the wind deflector device of the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.

[0026]

As described above, according to the wind deflector device of the present invention, when the vehicle is running at a high speed, the area of the stagnation point can always be kept at a minimum to suppress an increase in the Cd value, thereby improving fuel efficiency. If a wedge-shaped member is directly attached to the horizontal turning axis of the wind direction indicator via an arm, various detectors, driving devices, controllers, and the like can be obtained. It is not necessary to provide such a structure, and it is possible to achieve an excellent effect that the structure can be simplified and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of an embodiment of the present invention.

FIG. 2 is a side view of one embodiment of the present invention.

FIG. 3 is a plan view showing a case where the yaw angle is 0 ° when the vehicle is running at a high speed in one embodiment of the present invention.

FIG. 4 is a plan view showing a case where the yaw angle is 時 に during high-speed running of the vehicle in one embodiment of the present invention.

FIG. 5 is a perspective view showing an outline of another embodiment of the present invention.

FIG. 6 shows a conventional example in which the yaw angle is 0 when the vehicle is running at high speed.
It is a perspective view showing the case of °.

FIG. 7 shows a conventional example in which the yaw angle is ψ when the vehicle is running at high speed.
It is a perspective view showing the case of.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle 3 Roof 5 Wind deflector main body 6 Skirt part 7 Wind direction indicator 8 Horizontal turning axis 9 Turning angle detector 13 Wedge-shaped member 15 Drive device 18 Vehicle speed detector 19 Vehicle speed signal 20 Control signal 21 Angle signal 22 Controller O Center of curvature R Curvature radius

Claims (2)

(57) [Claims] 1. A wind deflector body disposed on a roof of a vehicle and having a substantially cylindrical skirt portion having a desired radius of curvature formed on a front portion thereof, according to a wind direction of a combined wind of a cross wind and a traveling wind. A wind direction indicator attached to a center of curvature of the skirt portion on the wind deflector body so that the wind direction indicator can be turned horizontally; a turning angle detector for detecting a direction indicated by the wind direction indicator; and an outer surface of the skirt portion A wedge-shaped member slidably provided along
A driving device that slides the wedge-shaped member, a vehicle speed detector that detects a traveling speed of the vehicle, and a wedge-shaped member positioned substantially at the center on the left and right sides of the skirt portion when the vehicle is running at a low speed based on a vehicle speed signal from the vehicle speed detector. A control signal to be held is output to the driving device, and the wedge-shaped member is controlled by the wind direction indicator according to an angle signal from the turning angle detector when the vehicle is traveling at high speed based on a vehicle speed signal from the vehicle speed detector. A wind deflector device comprising: a controller that outputs a control signal for causing the drive device to slide to an angular position that matches the designated direction. 2. A wind deflector body disposed on a roof of a vehicle and having a substantially cylindrical skirt portion having a desired radius of curvature formed on a front portion thereof, according to a wind direction of a synthetic wind of a cross wind and a traveling wind. A wind direction indicator attached to the center of curvature of the skirt portion on the wind deflector body so that the wind direction indicator can be turned freely, and an arm extending in the direction indicated by the wind direction indicator on the horizontal turning axis of the wind direction indicator. A wedge-shaped member attached and slidably provided along an outer surface of the skirt portion.