JP2003040030A - Controller for headlamp for vehicle - Google Patents

Controller for headlamp for vehicle

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Publication number
JP2003040030A
JP2003040030A JP2001229120A JP2001229120A JP2003040030A JP 2003040030 A JP2003040030 A JP 2003040030A JP 2001229120 A JP2001229120 A JP 2001229120A JP 2001229120 A JP2001229120 A JP 2001229120A JP 2003040030 A JP2003040030 A JP 2003040030A
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JP
Japan
Prior art keywords
vehicle speed
vehicle
optical axis
time
headlamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2001229120A
Other languages
Japanese (ja)
Inventor
Yoshihiro Mitsumoto
佳弘 光本
Original Assignee
Nissan Motor Co Ltd
日産自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd, 日産自動車株式会社 filed Critical Nissan Motor Co Ltd
Priority to JP2001229120A priority Critical patent/JP2003040030A/en
Publication of JP2003040030A publication Critical patent/JP2003040030A/en
Pending legal-status Critical Current

Links

Abstract

(57) [Problem] To prevent the optical axis or illuminance of a headlight from being frequently changed, thereby preventing a driver of a host vehicle and a preceding vehicle from being bothered. A headlight driving device is provided. A vehicle speed V detected by a vehicle speed sensor 2 is provided.
But when it becomes the first vehicle speed V0V less than 0, and drives the optical axis of the headlamp 6,7 downward by the optical-axis drive motor 4 and 5. On the other hand, the vehicle speed V detected by the vehicle speed sensor 2 is, when it becomes greater than the first vehicle speed V0V 0 second vehicle speed V3V 3 above, the optical-axis drive motor 4 and the optical axis of the headlamp 6,7, 5 drives it upward.
By providing the control of the headlamps 6 and 7 with hysteresis in this way, the optical axis is prevented from frequently moving up and down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle headlamp control device for controlling the direction and illuminance of a headlight according to the vehicle speed.

[0002]

2. Description of the Related Art When a vehicle headlight is turned on, if the vehicle speed of the vehicle is lower than a predetermined speed, the headlight is turned off or dimmed, and if the vehicle speed is higher than a predetermined speed. BACKGROUND ART There is known a vehicle headlamp control device that lights a headlight or makes the illuminance normal. By providing such a control device, it is possible to prevent the driver of the preceding vehicle from being dazzled when the vehicle stops immediately after the preceding vehicle due to, for example, traffic congestion or waiting for a signal.

When such a vehicle headlamp control device is used, the speed of the vehicle changes from a predetermined value or below, which is a reference for headlight control, to a higher speed, or from a predetermined value to a lower speed. Sometimes it repeats frequently. When the vehicle is repeatedly stopped and started, for example, while traveling on a congested road, the headlights are frequently turned on and off.
In such a case, there has been a problem that the drivers of the own vehicle and the preceding vehicle are bothered. In addition, a headlight using a discharge lamp has a problem that the life of the headlight decreases if the light is frequently turned on and off during operation.

To solve this, for example, Japanese Patent Laid-Open No. 7-
As in the headlight optical axis adjusting device described in Japanese Patent No. 257269, it is conceivable that the optical axis of the headlamp can be driven in the vehicle vertical direction based on the vehicle speed. JP-A-7-257
Japanese Patent Publication No. 269 discloses that the optical axis of the headlamp is driven downward in the vehicle vertical direction when traveling at a low speed, and the optical axis of the headlamp is driven upward in the vehicle vertical direction as the vehicle speed increases.

[0005]

However, when the acceleration / deceleration is repeated as in the case of traveling on a congested road, the optical axis is frequently driven in the vertical direction, which shortens the life of the driving device and reduces the driver's life. There was a problem that it felt annoying.

An object of the present invention is to prevent the optical axis or illuminance of the headlight from being frequently changed, thereby preventing the driver of the own vehicle and the preceding vehicle from being bothered. It is to provide a drive device for a headlight.

[0007]

(1) A drive device for a vehicle headlamp according to a first aspect of the present invention is an optical axis drive means for driving an optical axis of a headlamp provided in a vehicle in a vertical direction of the vehicle. And a vehicle speed detecting means for detecting the vehicle speed, and based on the vehicle speed detected by the vehicle speed detecting means, when the vehicle speed detected by the vehicle speed detecting means becomes less than a predetermined first vehicle speed, the optical axis And driving the optical axis when the vehicle speed detected by the vehicle speed detecting means is equal to or higher than a predetermined second vehicle speed which is higher than the first vehicle speed. The above-mentioned object is achieved by including a control means for driving the vehicle upward and downward by means.

(2) The invention of claim 2 is the control device for a vehicle headlamp according to claim 1, wherein the vehicle speed detected by the vehicle speed detecting means is equal to or higher than the first vehicle speed. When the vehicle speed is lower than the vehicle speed, the vehicle speed is equal to or higher than the first vehicle speed and lower than the second vehicle speed, and the predetermined third vehicle speed V is set.
The time that is 1 or more and the time that is less than the third vehicle speed V1 are integrated. Then, the integrated value of the time that is equal to or higher than the third vehicle speed V1 is compared with the integrated value of the time that is less than the third vehicle speed V1. When the integrated value of the time that is equal to or higher than the third vehicle speed V1 is equal to or higher than the integrated value of the time that is lower than the third vehicle speed V1, the optical axis is driven upward in the vehicle vertical direction by the drive unit. When the integrated value of the time that is equal to or higher than the third vehicle speed V1 is less than the integrated value of the time that is less than the third vehicle speed V1, the optical axis is driven downward by the drive unit.

(3) According to a third aspect of the present invention, in the vehicle headlamp control device according to the second aspect, the vehicle speed detected by the vehicle speed detecting means is from less than the first vehicle speed to more than the first vehicle speed. During the predetermined time from the above, the drive means does not drive the optical axis based on the integrated value of the time that is equal to or higher than the third vehicle speed V1 and the integrated value of the time that is less than the third vehicle speed V1.

(4) According to the invention of claim 4, in the control device for a vehicle headlight according to claim 2 or 3, when the control means changes the speed from less than the first vehicle speed to more than the first vehicle speed. When the vehicle speed reaches a predetermined fourth vehicle speed that is less than the second vehicle speed and greater than the third vehicle speed V1 during a predetermined time from, the optical axis is moved upward in the vehicle vertical direction by the drive means. Drive.

(5) The invention of claim 5 is the control device for a vehicle headlight according to any one of claims 1 to 4, wherein the upper limit value for driving the headlight upward is set in a plurality of steps. A setting device for setting is further provided.

(6) According to a sixth aspect of the present invention, there is provided a vehicle headlamp driving apparatus, which comprises an illuminance changing means for changing the illuminance of a headlight provided on a vehicle, a vehicle speed detecting means for detecting a vehicle speed, and a vehicle speed. Based on the vehicle speed detected by the detection means, when the vehicle speed detected by the vehicle speed detection means is less than a predetermined first vehicle speed, while reducing the illuminance of the headlight by the illuminance changing means, When the vehicle speed detected by the vehicle speed detecting means is equal to or higher than a predetermined second vehicle speed which is higher than the first vehicle speed, the illuminance changing means increases the illuminance of the headlight by the illuminance changing means. By including a control means, the said objective is achieved.

[0013]

According to the first to fifth aspects of the invention, when the vehicle speed detected by the vehicle speed detecting means becomes less than a predetermined first vehicle speed, the optical axis is moved downward in the vehicle vertical direction by the driving means. To prevent the vehicle in front of you from being dazzled. Then, when the vehicle speed detected by the vehicle speed detecting means becomes equal to or higher than a predetermined second vehicle speed which is higher than the first vehicle speed, the optical axis is driven upward by the drive means in the vehicle vertical direction, Raise. In this way, by providing the headlight control with hysteresis and preventing the optical axis from moving up and down frequently, it is possible to prevent the life of the drive device from being shortened and prevent the driver from being bothered. it can. Further, since it is not necessary to repeatedly turn on and off the headlight during traveling, it is possible to prevent the life from being shortened when a discharge lamp is used as the headlight.

According to the fifth aspect of the invention, when the vehicle speed detected by the vehicle speed detecting means becomes less than the predetermined first vehicle speed, the illuminance changing means lowers the illuminance of the headlight. On the other hand, when the vehicle speed detected by the vehicle speed detecting means becomes equal to or higher than a second vehicle speed which is larger than the first vehicle speed and is set in advance, the illuminance changing means increases the illuminance of the headlight. In this way, the headlamp control is provided with hysteresis to prevent the illuminance from being changed frequently, so that the life of the headlamp is not shortened and the driver is not bothered. You can

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

<1. Configuration of Control Device> FIG. 1 is a block diagram of a control device for a vehicle headlamp according to an embodiment of the present invention. The controller 1 is connected to a vehicle speed sensor 2, a manual switch 3, a right side optical axis drive motor 4 and a left side optical axis drive motor 5. The battery + B is connected to the controller 1 and the drive motors 4 and 5, and is also connected to the right headlamp 6 and the left headlamp 7 which are headlamps through the headlamp switch 8 so that power can be supplied to them. It has become.

The vehicle speed sensor 2 detects a vehicle speed V which is a traveling speed of the vehicle and outputs the vehicle speed V to the controller 1. The manual switch 3 is a changeover switch operated by the driver of the vehicle, for example, for setting the upper limit of the vehicle vertical direction angle of the optical axis by the headlamps 6 and 7 at the setting positions of the lower, middle and upper stages. Is. This setting can be performed in accordance with the vehicle loading state that changes depending on the loading state of the cargo and the number of passengers. That is, the set angle of the optical axis set by the manual switch 3 is the upper limit angle. Therefore, it is desirable that the lowermost position of the optical axis is further below the lower position set by the manual switch 3.

The right optical axis drive motor 4 is the controller 1
A reflector (not shown) provided in the headlamp 6 on the right side of the vehicle is driven based on the angle control signal from. As a result, the right-side optical axis drive motor 4 drives the optical axis of the headlamp 6 on the right side of the vehicle at a predetermined angle in the vertical direction of the vehicle.

The left-side optical axis drive motor 5 drives a reflector (not shown) provided on the headlamp 7 on the left side of the vehicle based on the angle control signal from the controller 1, like the right-side optical axis drive motor 4. . As a result, the left optical axis drive motor 5 drives the optical axis of the headlamp 7 on the left side of the vehicle to a predetermined angle in the vehicle vertical direction.

The right-side optical axis drive motor 4 and the left-side optical axis drive motor 5 drive not only the reflector but also the entire headlamp so that the optical axes of the headlamps 6 and 7 on the right and left sides of the vehicle move vertically. It may be driven.

The headlamp switch 8 is operated by the driver. Headlamp switch 8 is closed (ON)
Then, the headlamp 6 on the right side of the vehicle and the headlamp 7 on the left side of the vehicle, which are respectively provided in the headlamp housings (not shown) on the left and right of the vehicle, are turned on.

The controller 1 has a manual switch 3
The vehicle speed data sent from the vehicle speed sensor 2 is received. The controller 1 supplies drive signals to the right side optical axis drive motor 4 and the left side optical axis drive motor 5 based on the state of the manual switch 3 and the vehicle speed data.

More specifically, the controller 1 comprises an arithmetic unit 10, a manual switch state detecting unit 11, a right side optical axis drive motor control unit 12 and a left side optical axis drive motor control unit 13.

The manual switch state detecting section 11 is connected to the manual switch 3 and the calculating section 10, detects the setting state of the manual switch 3, and calculates a setting position signal corresponding to the detected setting state of the manual switch 3. Send to 10.

The right side optical axis drive motor control section 12 is connected to the arithmetic section 10 and the right side optical axis drive motor 4. The right side optical axis drive motor control unit 12 controls the right side optical axis drive motor 4 based on the angle signal sent from the arithmetic unit 10 to control the headlamp reflector (not shown) to an angle based on the angle signal.

The left optical axis drive motor control section 13 is connected to the arithmetic section 10 and the left optical axis drive motor 5. The left-side optical axis drive motor control unit 13 controls the left-side optical axis drive motor 5 based on the angle signal sent from the arithmetic unit 10 in the same manner as the right-side optical axis drive motor control unit 12 to control the headlamp reflector (non-operating). (Shown) is controlled to an angle based on the angle signal.

The calculation unit 10 calculates the optical axis angle of the headlamp to be set based on the set position signal sent from the manual switch state detection unit 11 and the vehicle speed V sent from the vehicle speed sensor 2. . Then, the calculation unit 10 uses the calculated angle as an angle signal for the right optical axis drive motor control unit 1
2 and the left optical axis drive motor control unit 13.

<2. Calculation Content of Calculation Unit 10> FIG. 2 is a graph showing an example of the relationship between the time T and the vehicle speed V, and the calculation contents of the calculation unit 10 will be described based on this graph. In FIG. 2, the vertical axis represents the vehicle speed V detected by the vehicle speed sensor 2,
The horizontal axis represents the time T from the start of the vehicle. The solid line a in FIG. 2 represents the relationship between the time T and the vehicle speed V. Hereinafter, the optical axis angle corresponding to the lowermost portion in the vertical direction of the vehicle will be described as a minimum angle, and the optical axis angle set by the manual switch 3 will be described as a maximum angle.

<2-1. In the case of vehicle speed V <V 0 > The vehicle speed V is the first vehicle speed V, such as between t 0 and t 1 in FIG.
If it is less than 0 (for example, 8 km / h), the calculation unit 10
Is the right angle optical axis drive motor control unit 12
And to the left side optical axis drive motor controller 13. As a result, the motor control units 12 and 13 drive the optical axis of the headlamp to the lowermost position in the vehicle vertical direction.

<2-2. V0<Vehicle speed V <VThreeIn case of>
T in 21To t7The vehicle speed V is the first
Vehicle speed V0With the above, the second vehicle speed VThree(For example, 40km / h)
If it is less than the predetermined third vehicle speed V1that's all
Time and V1And time less than each are added up. here
Third vehicle speed V 1Is V0Or more VThreeLess than, for example, 20 km
It is set to / h. And this V1Over time
Integrated value and V1Based on the integrated value of time less than 1
0 indicates the angle signal on the right side optical axis drive motor control unit 12 and the left side.
Send to the side optical axis drive motor control unit 13 to
The optical axis is controlled as described below.

[0031] First, the integrated value of V 1 or more of the time T + =
{(T 3 -t 2) + (t 5 -t 4) + (t 7 -t 6)}
And the integrated value T = {(t 2 −t 1 ) + of the time less than V 1.
(T 4 −t 3 ) + (t 6 −t 5 )} is compared. Next, when the integrated value T + of the time of V 1 or more is the integrated value T of the time of less than V 1 , the calculation unit 10 sends the angle signal of the maximum angle to the right optical axis drive motor control unit 12 and the left side. It is sent to the optical axis drive motor controller 13. Thereby, each control unit 1
Reference numerals 2 and 13 drive the optical axis of the headlamp to the uppermost position in the vehicle vertical direction. On the other hand, the integrated value T + of the time of V 1 or more
Is smaller than the integrated value T of the time less than V 1 , the calculation unit 10 sends the angle signal of the minimum angle to the right side optical axis drive motor control unit 12 and the left side optical axis drive motor control unit 13.
As a result, the control units 12 and 13 drive the optical axis of the headlamp to the lowermost position in the vehicle vertical direction.

However, the vehicle speed V is V0Or more VThreeBecame less than
Time t1From the predetermined time T0Later time t aUp to arithmetic unit 1
0 indicates the angle signal on the right side optical axis drive motor control unit 12 and the left side.
It is not sent to the side optical axis drive motor control unit 13. That is,
Do not drive the optical axis of the headlamp. Such a period
To V1Integrated value T of the above time+And V1Less than an hour
Integrated value TIf control is performed based on the difference between
May give forgiveness. Vehicle speed V
Data is poor, V1Integrated value T of the above time+And V
1Integrated value T of less thanFrequently changes the size relationship with
This is because it is bad.

In this embodiment, the driving direction of the optical axis is determined depending on whether the difference between T + and T is a predetermined value (here, 0) or more. However, the ratio between T + and T is determined. The driving direction of the optical axis may be determined depending on whether or not it is equal to or more than a predetermined value.
Moreover, when the optical axis is driven upward or downward, the optical axis is driven upward or downward, but the driving range is divided into a plurality of stages, and each time the magnitude relationship between T + and T is determined, It is also possible to drive upward or downward one step at a time.

<2-3. When V 3 ≤ vehicle speed V> When the vehicle speed V is equal to or higher than the vehicle speed V 3 as in the period from t 7 to t 8 in FIG. 2, the calculation unit 10 sends the angle signal of the maximum angle to the right optical axis drive motor control. It is sent to the unit 12 and the left optical axis drive motor control unit 13. As a result, the motor control units 12 and 13 drive the optical axis of the headlamp to the uppermost position in the vehicle vertical direction.

<2-4. Vehicle speed V is V0Or more VThreeLess than
Time T from when0Between> t in FIG.9Like a car
Speed V is V0Or more VThreeFrom the time when it becomes less than the predetermined time T 0
Time elapsesbUntil the headlamp light as described above
Prohibit axis drive. However, during this period, the vehicle speed V is predetermined.
Fourth vehicle speed VTwoWhen (t10) Is the operation
The part 10 controls the right-side optical axis drive motor with the angle signal of the maximum angle.
It is sent to the unit 12 and the left optical axis drive motor control unit 13. This
As a result, the optical axis of the headlamp is moved to the uppermost position in the vehicle vertical direction.
Drive to. Here the fourth vehicle speed VTwoIs V1Or more VThree
It is set to a value less than, for example, 30 km / h.

[0036] By processing in this manner, during the predetermined time T 0 from when the vehicle speed V is set to V 0 or from less than V 0, although the vehicle speed V is large, the headlamp light It is possible to prevent the shaft from being driven upward. Thus, it is possible to prevent the driver from feeling uncomfortable.

<3. Operation of Computing Unit 10> FIG. 3 is a flowchart for explaining the procedure of processing by the computing unit 10 of the control device according to the above embodiment. The processing by the calculation unit 10 is started, for example, when the headlamp is turned on by operating the headlamp switch 8, and is continued until the headlamp is turned off by operating the headlamp switch 8.

<3-1. S1 and S2> First, the calculation unit 10
Determines whether the vehicle speed V is lower than the first vehicle speed V 0 based on the vehicle speed data from the vehicle speed sensor 2 (step S1). When it is determined that the vehicle speed V is less than V 0 (S
1: YES), the calculation unit 10 sends an angle signal of the minimum angle to the right side optical axis drive motor control unit 12 and the left side optical axis drive motor control unit 13. As a result, the calculation unit 10 can drive the optical axis of the headlamp to the lowermost position in the vehicle vertical direction (step S2). After that, if necessary, a predetermined time (for example, 0.5 seconds) elapses, and the process returns to step S1.

<3-2. S3> When it is determined in step S1 that the vehicle speed V is V 0 or higher (S1:
NO), the arithmetic unit 10 determines, based on the vehicle speed data from the vehicle speed sensor 2, whether the vehicle speed V is the second vehicle speed V 3 or more (Step S3).

<3-3. S4> when the vehicle speed V is determined to be V 3 or more (S3: YES), the arithmetic unit 10 sends the angle signal of the maximum angle to the right light-axis drive motor controller 12 and the left optical axis drive motor controller 13 . As a result, the calculation unit 10 can drive the optical axis of the headlamp to the uppermost position in the vehicle vertical direction (step S4). afterwards,
If necessary, a predetermined time (for example, 0.5 seconds) elapses, and the process returns to step S1.

<3-4. S5, S6> above step S3
In the case where it is determined that the vehicle speed V is less than V 3 (S3: NO), the calculation unit 10 determines that the vehicle speed V is V 0 or more and V 3 or more.
Counting of T 0 , which is a predetermined time from the time when it becomes less than, is started (step S5). Further, the vehicle speed V output from the vehicle speed sensor 2 and the third vehicle speed V 1 are sequentially compared, and the integrated value T + of the time when the vehicle speed V is V 1 or more and the integration of the time when it is less than V 1 are integrated. the value T - starts the operation and respectively (step S6). That is, of the time the vehicle speed V has passed from the time it becomes less than greater than or equal to V 0 V 3, and the integrated value T + time the vehicle speed V is V 1 or more, the integrated value of time that is less than V 1 T - and Are calculated almost in real time. The calculation of the integrated values T + and T is continued as long as the vehicle speed V is V 0 or more and less than V 3 even after the predetermined time T 0 has elapsed.

<3-5. S7> Next, the calculation unit 10 determines whether or not a predetermined time T 0 has elapsed since the vehicle speed V became V 0 or more and less than V 3 (step S7).

<3-6. S8: Processing after T 0 has elapsed> When it is determined that the predetermined time T 0 has elapsed since the vehicle speed V became V 0 or more and less than V 3 (S7: YES), the calculation unit 10 calculates integrated value T + and T - the difference between the T + -T - calculating a. Then, it is determined whether the calculated difference is 0 or more (step S8).

<3-7. S9> this T+-TIs 0 or more
If it is determined that the vehicle speed V is V0Or more V Three
Of the time that has elapsed from when
+Is the integrated value TIf it is above (S8: YES),
Then, the process proceeds to step S9. In step S9, performance
The calculation unit 10 includes a right side optical axis drive motor control unit 12 and a left side
An angle control signal is sent to the optical axis drive motor control unit 13,
The optical axis of the damp lamp is driven upward in the vehicle vertical direction.

<3-8. S10> In the above step S8, when it is determined that T + −T is less than 0, that is, the integrated value T + in the time elapsed from when the vehicle speed V becomes V 0 or more and less than V 3. Is smaller than the integrated value T (S8: NO), the process proceeds to step S10.
In step S10, the calculation unit 10 causes the right optical axis drive motor control unit 12 and the left optical axis drive motor control unit 13 to operate.
To drive the optical axis of the headlamp downward in the vehicle vertical direction.

Determination of step S8 and step S8
By the processing of 9 or 10, even if the vehicle speed V is between the first vehicle speed V 0 and the second vehicle speed V 3 , the third vehicle speed V1V 1
The optical axis can be controlled based on the magnitude of the above frequency and the frequency of less than V 1 . Also, while interchanged the process for execution only if the predetermined time T 0 is determined to have elapsed in step S7, the frequency of large and small is frequency and V 1 or less is V 1 or in a short time, The drive of the optical axis can be prohibited.

<3-9. S11, S12> Step S9
Alternatively, after the processing of 10 is completed, the calculation unit 10 determines that the vehicle speed V is V
0Or more V ThreeIt is determined whether or not it is less than (step S1
1). From the time of determination in steps S1 and 3 above,
The speed V changes and the vehicle speed V becomes V0Less than or VThreeDetermined as above
If it is done (S11: NO), the predetermined time T0Count
Time data for doing, the integrated value T+And TDe
Data is cleared (step S12). Then in need
Depending on the time, wait for a predetermined time (for example, 0.5 seconds)
Return to step S1.

When it is determined in step S11 that the vehicle speed V is V 0 or more and less than V 3 (S11: YE) as in the determinations in steps S1 and 3 above.
S), if necessary, wait for a predetermined time (for example, 0.5 seconds) to elapse, and then return to step S7.

<3-10. S13: Process before T 0 Elapses>
When it is determined in step S7 that the predetermined time T 0 has not elapsed since the vehicle speed V became V 0 or more and less than V 3 (S7: NO), the vehicle speed V is the fourth vehicle speed V 2 or more. It is determined whether or not (step S13). Vehicle speed V
Is greater than or equal to V 2 , the process proceeds to step S9, and the arithmetic unit 10 drives the optical axis of the headlamp upward in the vehicle vertical direction. As a result, even before the predetermined time T 0 has elapsed, the optical axis can be driven upward when the fourth vehicle speed V 2 is reached.

<3-11. S14> the above step S13
In the case where the vehicle speed V is less than V 2 , the calculation unit 1
0 determines whether the vehicle speed V is less than V 0 (step S14). When it is determined that the vehicle speed V is equal to or higher than V 0 as in the determination in step S1 (S14:
NO), wait for the lapse of a predetermined time (for example, 0.5 seconds) if necessary, and return to step S7.

<3-12. S15> the above step S14
In step S1, the vehicle speed V
Changes and is determined to be less than V 0 (S14: YE
S), time data for counting the predetermined time T 0 ,
The data of the integrated values T + and T are cleared (S1
5). After that, the process shifts to step S2 to drive the optical axis to the lowermost position, and the process returns to step S1.

In the drive unit of such an embodiment, the following
The following effects are achieved. (1) The vehicle speed detected by the vehicle speed sensor 2 is predetermined
First vehicle speed V0If it is less than
Drive the motors 4 and 5 downward in the vertical direction of the vehicle
Prevents dazzling running vehicles. And the vehicle speed
The vehicle speed detected by the sensor 2 is the first vehicle speed V0Than
Larger second predetermined vehicle speed VThreeWhen it is over
In this case, the optical axis is moved up and down by the drive motors 4 and 5.
Drive toward and raise the optical axis. In this way to control the headlights
It has hysteresis to prevent the optical axis from moving up and down frequently.
By stopping it, the life of drive motors 4 and 5 is prevented from being shortened.
However, it is possible to prevent the driver from being bothered.
Wear. In addition, the headlights are turned on and off repeatedly while driving.
When using a discharge lamp as a headlight, it is not necessary to
It is possible to prevent a decrease in life. (2) The vehicle speed detected by the vehicle speed sensor 2 is the first vehicle
Speed V0Second vehicle speed V above ThreeIf less than, first
Vehicle speed V0First vehicle speed V0With the above, the second vehicle speed VThreeLess than car
A predetermined third vehicle speed V that is a speed1Time is over
And the third vehicle speed V 1And the time that is less than
It Furthermore, the third vehicle speed V1The integrated value T of the time that is the above+
And the third vehicle speed V1Integrated value T of time that is less thanCompare with
To do. And the third vehicle speed V1Integrated value of time that is above
T+Is the third vehicle speed V1Integrated value T of time that is less thanthat's all
If the optical axis is driven by the drive motors 4 and 5,
Drive upward in the vertical direction. On the other hand, the third vehicle speed V1that's all
The integrated value T of time+Is the third vehicle speed V1When is less than
Integrated value T betweenDrive the optical axis if less than
The vehicle is driven downward in the vertical direction by the motors 4, 5. others
Therefore, the first vehicle speed V0Second vehicle speed V aboveThreeWhen driving below
In, the third vehicle speed V1Frequently traveling above
In some cases, raise the optical axis to increase the third vehicle speed V1Frequent driving less than
If the degree is high, the optical axis can be lowered. Therefore,
While preventing the optical axis from being frequently driven up and down,
Fine control is possible and the driver feels inconvenient
Can prevent you from feeling bothersome
It

(3) Accumulation of the time that is less than the third vehicle speed V 1 for a predetermined time T 0 from the time when the vehicle speed detected by the vehicle speed sensor 2 becomes less than or equal to the first vehicle speed V 0. The optical axes are not driven by the drive motors 4 and 5 based on the value T and the integrated value T + for the time that is equal to or higher than the third vehicle speed V 1 .
As described above, the drive motors 4, 4 are provided immediately after the vehicle speed becomes less than the first vehicle speed V 0 and higher, that is, when the vehicle speed data is less accumulated and the integrated value easily reverses in a short time.
The optical axis is not driven by 5. Therefore, it is possible to prevent the optical axis from being driven carelessly.

(4) First vehicle speed V0Less than or more than
Time T from when0During, the second vehicle speed VThreeIs less than
Is the third vehicle speed V1A predetermined fourth greater than
Vehicle speed V TwoIn case of, the optical axes are set to the drive motors 4 and 5.
Therefore, the vehicle is driven upward in the vertical direction. Therefore, the vehicle speed
Despite the fact that the
Drives the optical axis upward in the vertical direction of the vehicle due to the absence of periods
It is possible to prevent not being done. Therefore luck
It is possible to prevent the transferred person from feeling uncomfortable.

<4. Other Modifications> In the present embodiment, the uppermost portion of the optical axis in the vehicle vertical direction is the optical axis angle set by the driver with the manual switch, but the present invention is not limited to this, and the uppermost portion of the optical axis drive range may be used. It may be.

In the above embodiment, the optical axis is controlled according to the vehicle speed, but the illuminance of the headlight may be controlled instead of controlling the optical axis. In this case, it is preferable that the control signal of the calculation unit 10 is output to an illuminance changing unit such as an illuminance change switch (not shown), and the illuminance change switch is changed over.

Although the upper limit of the optical axis is switched in three steps by the manual switch 3, it may be set in two steps or four steps or more. The lowermost position of the optical axis is the lowermost position of the optical axis peculiar to the vehicle, but the lowermost position may be switched by a switch. Alternatively, the uppermost position may be switched by a switch different from the manual switch 3.

The components of the above embodiment correspond to the components of the claims as follows. The controller 1 serves as control means, the vehicle speed sensor 2 serves as vehicle speed detection means, the manual switch 3 serves as a setter, the right optical axis drive motor 4 and the left optical axis drive motor 5 serve as optical axis drive motors 4, 5.
The headlamps 7 and 8 correspond to headlights, respectively.

[Brief description of drawings]

FIG. 1 is a block diagram of a vehicle headlamp control apparatus according to an embodiment of the present invention.

FIG. 2 is a graph showing an example of the relationship between time T and vehicle speed V.

FIG. 3 is a flowchart illustrating a procedure of processing by a calculation unit 10 of the control device according to the above embodiment.

[Explanation of symbols]

1 controller 2 vehicle speed sensor 4 right side optical axis drive motor 5 left side optical axis drive motor 6 right side headlamp 7 left side headlamp V 0 first vehicle speed V0 V 1 third vehicle speed V1 V 2 fourth vehicle speed V 3 second Vehicle speed V3 T 0 Predetermined time from when vehicle speed V becomes V 0 or more and less than V 3

Claims (6)

[Claims]
1. Based on a vehicle speed detected by the vehicle speed detecting means, an optical axis drive means for driving an optical axis of a headlamp provided in the vehicle in a vertical direction of the vehicle, a vehicle speed detecting means for detecting a vehicle speed. ,
When the vehicle speed detected by the vehicle speed detecting means is lower than a predetermined first vehicle speed, the optical axis is driven downward in the vehicle vertical direction by the driving means and detected by the vehicle speed detecting means. When the vehicle speed is equal to or higher than a predetermined second vehicle speed that is higher than the first vehicle speed, the control means drives the optical axis upward in the vehicle vertical direction by the drive means. A control device for a characteristic vehicle headlight.
2. The vehicle headlamp control apparatus according to claim 1, wherein the control unit is configured such that the vehicle speed detected by the vehicle speed detection unit is equal to or higher than the first vehicle speed. When the vehicle speed is lower than the first vehicle speed, the time is equal to or higher than the first vehicle speed and lower than the second vehicle speed and is equal to or higher than a predetermined third vehicle speed V1, and lower than the third vehicle speed V1. And the integrated value of the time that is the third vehicle speed V1 or more and the integrated value of the time that is less than the third vehicle speed V1 are compared, and at the third vehicle speed V1 or more, When the integrated value of a certain time is equal to or greater than the integrated value of the time that is less than the third vehicle speed V1, the optical axis is driven upward in the vehicle vertical direction by the drive means, and the third vehicle speed V1 is set. If the integrated value of the above time is less than the third vehicle speed V1 That when the time is less than the integrated value before the vehicle, characterized in that driving under the vehicle vertical direction by the driving means the optical axis head lamp control unit.
3. The control device for a vehicle headlamp according to claim 2, wherein the control means has a vehicle speed detected by the vehicle speed detection means from less than the first vehicle speed to more than the first vehicle speed. For a predetermined time from the time when the above, the drive means drives the optical axis based on an integrated value of time that is equal to or higher than the third vehicle speed V1 and an integrated value of time that is less than the third vehicle speed V1. A control device for a vehicle headlight, which is characterized in that it is not turned off.
4. The vehicle headlamp control device according to claim 2 or 3, wherein the control means has a predetermined time from when the vehicle speed is lower than the first vehicle speed to the first vehicle speed or more. In the meantime, when the predetermined fourth vehicle speed that is lower than the second vehicle speed and higher than the third vehicle speed V1 is reached, the optical axis is moved in the vehicle vertical direction by the drive means. A vehicle headlamp control device characterized by being driven upward.
5. The vehicle headlamp control apparatus according to claim 1, further comprising a setter that sets an upper limit value at which the headlamp is driven upward in a plurality of steps. A control device for a characteristic vehicle headlight.
6. An illuminance changing means for changing the illuminance of a headlight provided on a vehicle, a vehicle speed detecting means for detecting a vehicle speed, and a vehicle speed detected by the vehicle speed detecting means,
When the vehicle speed detected by the vehicle speed detecting means is lower than a predetermined first vehicle speed, the illuminance changing means reduces the illuminance of the headlight, and the vehicle speed detected by the vehicle speed detecting means. Is provided with a control means for increasing the illuminance of the headlight by the illuminance changing means when the illuminance of the headlight is equal to or higher than a predetermined second vehicle speed which is higher than the first vehicle speed. A control device for a vehicle headlamp, comprising:
JP2001229120A 2001-07-30 2001-07-30 Controller for headlamp for vehicle Pending JP2003040030A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001229120A JP2003040030A (en) 2001-07-30 2001-07-30 Controller for headlamp for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001229120A JP2003040030A (en) 2001-07-30 2001-07-30 Controller for headlamp for vehicle

Publications (1)

Publication Number Publication Date
JP2003040030A true JP2003040030A (en) 2003-02-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001229120A Pending JP2003040030A (en) 2001-07-30 2001-07-30 Controller for headlamp for vehicle

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008143505A (en) * 2006-11-16 2008-06-26 Denso Corp Headlight control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008143505A (en) * 2006-11-16 2008-06-26 Denso Corp Headlight control device
JP4720764B2 (en) * 2006-11-16 2011-07-13 株式会社デンソー Headlight control device

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