JPH07277077A - Door mirror control device - Google Patents

Abstract

PURPOSE:To reduce air resistance by door mirrors during run of a vehicle. CONSTITUTION:During running at a low speed, a door mirror main body 6 is set to stand at about 90 deg. to a door 7, and during running at a high speed, an actuator 4 for a door mirror is driven to move the mirror main body 6 to decrease an angle of the door mirror main body 6 to the door 7 automatically. For preventing a field of view from becoming too small by decrease of the angle of the door mirror main body 6, a mirror surface actuator 5 is driven to move a mirror surface 8 provided in the door mirror main body 6 for correcting its angle automatically so as to secure a certain degree of the field of view on the back of the mirror surface 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door mirror control device for automatically correcting an angle of a rear view door mirror provided on a vehicle door.

[0002]

2. Description of the Related Art Conventionally, in order to reduce wind noise and improve fuel efficiency, reduction in air resistance during running of a vehicle has been required. In order to reduce the air resistance, the body shape has been improved.

[0003]

However, the vehicle door is provided with a rear view door mirror. Normally, when the vehicle is running, the door mirror projects from the body, so that the air resistance of the door mirror is considerably large. Therefore, the air resistance is not yet sufficiently reduced.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a door mirror control device capable of reducing the air resistance of the door mirror when the vehicle is traveling.

[0005]

In order to achieve the above object, a door mirror control device of the present invention comprises a vehicle speed detecting means for detecting a vehicle speed and an angle of the door mirror according to the vehicle speed detected by the vehicle speed detecting means. And a correcting means for correcting the image.

[0006]

According to the present invention, when the vehicle starts traveling and the vehicle speed changes, the vehicle speed detecting means detects this and the correcting means corrects the angle of the door mirror according to the vehicle speed.

[0007]

EXAMPLES An example of the present invention will be described below.
FIG. 1 shows a state in which the door mirror body 6 is erected at about 90 ° with respect to the door 7. The door mirror body 6 is provided with a door mirror actuator 9, a mirror surface 8, and a mirror surface actuator 10. The door mirror actuator 6 is driven to change the angle of the door mirror body 6, and the mirror surface actuator 10 is driven. The angle of the mirror surface 8 changes.

FIG. 2 is a wiring diagram of the apparatus. In FIG. 2, reference numeral 1 denotes an angle sensor for detecting the angle of the door mirror, which is composed of a potentiometer whose resistance value changes according to the angle of the door mirror. Reference numeral 2 is a well-known vehicle speed sensor that detects the vehicle speed V, and reference numeral 3 is an ignition switch (hereinafter referred to as "IG / SW"). Reference numeral 9 is a door mirror actuator for adjusting the angle of the door mirror body, and 10 is a mirror surface actuator for adjusting the angle of the mirror surface in the door mirror.

Reference numeral 5 is a control circuit including an angle sensor circuit 5a, a vehicle speed sensor circuit 5b, an IG / SW circuit 5c, a CPU 5d, a door mirror driver circuit 5e, and a mirror surface driver circuit 5f. In the control section 5, the angle sensor circuit 5a
Processes the angle signal from the angle sensor 1, the vehicle speed sensor circuit 5b processes the vehicle speed signal from the vehicle speed sensor 2,
The SW circuit 5c processes the on / off signal from the IG / SW3. The signals processed by 5a to 5c in each circuit are C
Input to PU5d, CPU5d executes arithmetic processing,
The result is output to the driver circuit 5e for door mirrors and the driver circuit 5f for mirror surfaces. Door mirror driver circuit 5
e, the mirror surface driver circuit 5f processes the signal from the CPU 5d and outputs a drive signal to the door / door mirror actuator 9 and the mirror surface actuator 10.

The present embodiment has the above-described structure, and when the vehicle runs at a low speed, the door mirror body 6 stands up to about 90 ° with respect to the door 7 as shown in FIG. 1, and when traveling at a high speed, it is shown in FIG. As described above, the door mirror actuator 4 is driven to move the door mirror body 6, and the angle of the door mirror body 6 is automatically made smaller than that of the door 7. Furthermore, the mirror surface actuator 5 is driven to move the mirror surface 8 provided in the door mirror body 6 so that the field of view does not become too narrow as the angle of the door mirror body 6 becomes smaller.
The angle is automatically corrected so as to maintain a certain field of view behind the mirror surface 8.

Next, the arithmetic processing executed by the CPU 5d will be described with reference to the flowchart of FIG. CPU5d is
When the ON signal of the IG / SW 3 is input from the IG / SW circuit 5c, the following routine is started. First, step 10
At 0, the angle signal from the angle sensor circuit 5c is input to determine whether the door mirror body 6 is in the retracted state. When it is determined that the door mirror body 6 is in the stored state, the routine is skipped. That is, when the door mirror is stored in advance, the control is not executed. On the other hand, when it is determined that the door mirror body 6 is not in the retracted state, the process proceeds to step 110, and the vehicle speed signal from the vehicle speed sensor circuit 5b is input to determine whether the vehicle speed V is equal to or higher than a predetermined value V2. When the vehicle speed V is less than the predetermined value V2, step 140
Then, the signal is output to the door mirror driver circuit 5e and the mirror surface driver circuit 5f so that the motor body 6 and the mirror surface 8 are in the state shown in FIG. On the other hand, when the vehicle speed V is the predetermined value V2 or more, the routine proceeds to step 120, where it is determined whether the vehicle speed V is the predetermined value V1 or more. When the vehicle speed V is equal to or higher than the predetermined value V1, the routine proceeds to step 130, where signals are output to the door mirror driver circuit 5e and the mirror surface driver circuit 5f so that the motor body 6 and the mirror surface 8 are in the state shown in FIG. On the other hand, when the vehicle speed V is less than the predetermined value V1, the routine is skipped. When signals are output to both driver circuits 5e and 5f in steps 120 and 130, the routine is skipped.

As described above, in this embodiment, when the vehicle speed V is equal to or lower than the predetermined value V2, the air resistance is not so noticeable, so that the door mirror body 6 is completely erected and the vehicle speed V becomes higher than the predetermined value V1. As shown in FIG. 3, since the door mirror main body 6 is moved so as to automatically reduce the angle of the door mirror main body 6 with respect to the door 7, air resistance during high-speed traveling is reduced. Therefore, the wind noise when traveling at high speed is reduced, and the fuel economy is improved. Further, in this embodiment,
As the door mirror body 6 is moved, the mirror surface 8 is moved so as to keep the view behind the mirror surface 8. Therefore, even if the angle of the door mirror body 6 is made smaller with respect to the door 7, a certain degree of rear view is ensured. You can

In the above embodiment, the vehicle speed sensor 2 corresponds to the vehicle speed detecting means in the claims, and the control circuit 5, the door mirror actuator 9 and the mirror surface actuator 10 correspond to the same correction circuit. The door mirror body 6 and the mirror surface 8 correspond to the door mirror.

[0014]

As described above, according to the present invention, since the angle of the door mirror is corrected according to the vehicle speed, it is possible to reduce the air resistance due to the door mirror when the vehicle is running. effective.

[Brief description of drawings]

FIG. 1 is a diagram showing a state of a door mirror during low-speed traveling in one embodiment.

FIG. 2 is a connection diagram of an example.

FIG. 3 is a diagram showing a state of a door mirror during high-speed traveling in one embodiment.

FIG. 4 is a flowchart showing a calculation process executed by a CPU 5d.

[Explanation of symbols]

 2 Vehicle speed sensor 5 Control circuit 6 Door mirror body 8 Mirror surface 9 Door mirror actuator 10 Mirror surface actuator

Claims (1)

[Claims] 1. A door mirror control device comprising: a vehicle speed detecting means for detecting a vehicle speed; and a correcting means for correcting an angle of a door mirror according to a vehicle speed detected by the vehicle speed detecting means.