JPH08332888A - Headlight control device - Google Patents

Abstract

PURPOSE: To control flickering and dipping of a headlight in linkage with the stop and the starting of a vehicle. CONSTITUTION: A headlight control device comprises a car speed deciding means 11 to output an ON-signal when a car speed is zero; a first starting will detecting means 102 to output an OFF-signal when the shift position of a shift lever is varied to a forward range; and a stop operation detecting means 103 to detect that a vehicle is under stop operation from at least one signal of a parking brake signal, a foot brake signal, a parking position detecting signal, and a neutral position detecting signal and output an ON-signal during this time. A headlight control device is provided to dip or turn off headlights 1A and 1B only when all the outputs of the car speed deciding means 101, the first starting will detecting means 102, and the stop operation detecting means 103 are ON. During starting wherein some condition lacks, the headlights 1A and 1B are turned on (containing the increase of light) immediately without a time lag.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headlamp control device for controlling blinking and dimming of headlamps in conjunction with stopping and starting of a vehicle.

[0002]

2. Description of the Related Art In recent years, it has become a customary practice to turn off the headlamps once at a traffic light at an intersection or the like and then turn them on again when starting a vehicle. At this time, in general, the driver operates the switch to deal with it, but it is quite troublesome.

On the other hand, when the signal is stopped, various vehicle conditions are satisfied, such as the vehicle speed becoming zero. Therefore, some devices automatically control the flashing and dimming of the headlamps. Proposed. As an example of such a headlamp control device, there is a device as shown in FIG. In this device, the left and right headlamps 1
The vehicle speed signal from the vehicle speed sensor 3 is input to the controller 2 that controls A and 1B. Therefore, when the vehicle stops due to a stop signal at an intersection or the like, the speed signal from the vehicle speed sensor 3 becomes zero, whereby the headlamps 1A and 1B are automatically dimmed. On the other hand, when the vehicle is started by releasing the stop signal, the speed signal from the vehicle speed sensor 3 is turned on (ON), so that the headlamps 1A and 1B are automatically turned on. Therefore, the driver does not need to perform any special switch operation, and the driver is relieved from the trouble. Of course, in this kind of device, by normal switch operation,
As in the conventional case, the blinking of the headlamps 1A and 1B can be controlled.

[0004]

As the vehicle speed sensor 3 used in the above headlamp control device, it is quite difficult and costly to provide a dedicated speed sensor 3 for this device. Therefore, in general, an existing vehicle speed sensor, which is pre-installed, is often used for a speedometer or the like. In the case of such an existing vehicle speed sensor, generally, a plurality of magnets (magnets) are arranged on the peripheral surface of the drive shaft of the vehicle, and a magnetic sensor installed outside the magnet detects the rotation speed of the drive shaft. Consists of. However, except for special ones, the number of magnets is usually about two, and thus a slight time lag is inevitably generated when the vehicle starts.

FIG. 8 shows this relationship more specifically.
~ As shown in FIG. For example, in the case of a vehicle speed sensor in which two magnets 5a and 5b are provided on the peripheral surface of the drive shaft 4 as shown in FIG. The presence or absence of is not detected. That is, as shown in FIG. 9, when the vehicle starts from the stopped state and shifts to the running state, the analog vehicle speed gradually increases as shown by the curve 7, but the vehicle speed pulse 8 by the magnetic sensor 6 is increased. Is generated at a time t ₁ corresponding to a half circumference of the drive shaft 4.
Since it appears later, the ON signal 9 from the vehicle speed sensor is also output after the time t ₁ . Therefore, the above-mentioned time lag occurs.

That is, if there is such a time lag,
Headlight 1 immediately after stepping on the accelerator when starting
A and 1B do not illuminate, and after moving forward a little (after a short time interval), they illuminate, which makes me feel uneasy and feels inconvenience for a short time.

The present invention has been made in view of such a conventional situation. When the vehicle is stopped, the headlamps are automatically dimmed or turned off as in the conventional case, while there is no time lag when starting. It is intended to provide a headlamp control device that is turned on immediately.

[0008]

According to a first aspect of the present invention, there is provided a headlamp control device for detecting a stop state of a vehicle to turn off or turn off the headlamp and turn on the headlamp when starting. In addition, when the vehicle speed is zero, the vehicle speed determining means outputs an ON signal, and when the shift position of the systole bar is changed to the forward range, it is turned off (O
FF) The vehicle is in the stop operation from the first willingness to detect starting signal and at least one of the parking brake signal, the foot brake signal, the parking position detection signal of the sistreva and the neutral position detection signal of the sistreva. And a stop motion detection means for outputting an ON signal during that time, and only when all outputs of the vehicle speed determination means, the first start intention detection means and the stop motion detection means are ON. The headlamp control device is characterized in that the headlamp is dimmed or turned off.

A headlamp control device according to a second aspect of the present invention is the headlamp control device according to the first aspect, wherein the vehicle speed is zero, the shift position of the systole lever is in the forward range, and the foot brake is released. After that, a second starting intention detecting means for outputting an OFF signal for a predetermined period is provided, and both outputs of the second starting intention detecting means and the first starting intention detecting means are turned on.
The headlamp control device is characterized in that the headlamp is dimmed or turned off only when the vehicle speed determination means and the stop operation detection means are ON.

[0010]

In the headlamp control device according to claim 1 of the present invention, not only the vehicle speed is determined, but also the vehicle speed determination means, the first starting intention detection means, and the stop operation detection means are provided. After confirming the driver's willingness to start and the stopping operation by the driver, only when all the outputs of these three conditions are on (ON), the headlamp is dimmed or extinguished, while one of the conditions is missing At times, the headlamp can be turned on (including brightening) immediately without a time lag.

In the headlamp control device according to claim 2 of the present invention, the vehicle speed determining means, the first starting intention detecting means, the second starting intention detecting means, and the stopping operation detecting means are provided. Not only judgment of vehicle speed,
After confirming the driver's willingness to start and the stopping operation by the driver, the headlamp is dimmed or turned off only when all the outputs of these four conditions are on (ON) The headlamp can be immediately turned on (including brightening) without a time lag at the time of starting when the vehicle lacks.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an overall configuration of a headlamp control device according to the present invention, FIG. 2 is a logic circuit diagram showing one embodiment thereof, and FIG. 3 is a time chart diagram of the logic circuit diagram. Is. In the figure, 1A and 1B are the same headlamps as in the conventional case, 12 is a controller having a built-in computer or the like, and 13 is a vehicle speed sensor. The vehicle speed sensor 13 is not particularly limited, but an existing vehicle speed sensor such as a speedometer having the structure shown in FIG. 8 may be used, and good economy can be obtained.
14 is an ON output (b signal) when the shift lever shift state is in the starting range (including the D range, as well as the starting range of the first, second and third)
The D range detecting means 15 is turned on (O) when the parking brake is applied (locked).
N) Parking brake detection means for outputting (c signal),
16 is on (O when the foot brake is depressed
N) Foot brake detection means for outputting (d signal), 17
Is a P range detecting means for outputting (ON) output (e signal) when the shift state of the shift lever is in the parking range (P range), and 18 is ON when the shift state of the shift lever is in the neutral range (N range). An N range detecting means for outputting (ON) (f signal), 19 is a resetting means additionally provided for canceling the headlamp control.

Reference numeral 13a denotes a retriggerable mono-multi circuit which allows retrigger to be turned on (ON) for a predetermined time when a vehicle speed pulse from the vehicle speed sensor 13 is inputted,
13b is a NOT circuit, which cooperates with the vehicle speed sensor 13 to output an ON signal (a signal) when there is no vehicle speed pulse from the vehicle speed sensor 13 (when the vehicle speed is zero when the vehicle is stopped), It constitutes a vehicle speed determination means 101.
Reference numeral 14a detects the rising edge of the on output (b signal) of the D range detection means 14 and turns off (O) for a predetermined time.
It is a mono-multi circuit that outputs (FF) signal (b 'signal), and forms the first starting intention detecting means 102 in cooperation with the D range detecting means 14. 21 is the parking brake detection means 15, the foot brake detection means 16,
Each of c of P range detection means 17 and N range detection means 18
An OR circuit that outputs an ON signal (g signal) when an f signal is input and one of them is an ON output,
The stop action detecting means 103 is configured by the cooperation with each of these means 15 to 18.

Reference numeral 22 is on (ON) only when all outputs of the vehicle speed judging means 101, the first starting intention detecting means 102, and the stopping operation detecting means 103 are ON.
An AND circuit that outputs (h signal), 23 is a relay drive circuit, 24 is a relay circuit, and 25 is a lamp control circuit.
In these circuit systems, an ON (O
N) When there is an output, the relay drive circuit 23 drives, and in the relay circuit 24 of FIG.
The relay intercept 2 that was conducting until then, because it is excited
Since the relay section 24c becomes conductive at the same time as 4b becomes non-conductive, the lamp control circuit 25 operates and the dimming current is supplied or cut off. Therefore, the headlamps 1A and 1B are dimmed or turned off. To be done. On the other hand, when the relay section 24b of FIG.
1B is in a lighting state.

In the device of the present invention having such a structure, when the driver stops the vehicle, for example, by a stop signal at an intersection, the foot brake is depressed. After this stop, depending on the driver, the parking brake is pulled or the shift lever is switched to the P range or the N range. At this time, first, since the vehicle speed becomes zero, the vehicle speed determination means 101 of the vehicle speed sensor 13 is turned on (a).
Signal ON). When the foot brake is depressed, the parking brake is retracted, and the shift lever is switched to the P range or the N range, the OR circuit of the stop operation detecting means 103 is turned on (g signal O).
N). On the other hand, in the first starting intention detecting means 102, the on (ON) state from the mono-multi circuit 14a is maintained (b 'signal ON). Therefore, the AND circuit 22 is turned on (ON signal) and the relay drive circuit 2 is turned on.
The headlamps 1A and 1B are automatically dimmed or turned off through the relay circuit 24, the relay circuit 24, and the lamp control circuit 25.

Next, when the driver starts the vehicle from this stopped state, the vehicle speed determination means 10 of the vehicle speed sensor 13 is started.
In No. 1, in the a ₁ portion of the a signal, a slight time lag occurs and the ON state is maintained, but at least at the time of starting, the shift lever is operated to the forward range, so that the first starting intention detecting means 102 operates. Mono-multi circuit 1
The output from 4a is at a certain time, off ₍₁ part 'b of the signal' b) of the (OFF). Therefore, the AND
The circuit 22 is turned off (OFF signal h), and the headlamps 1A and 1B are automatically turned on without a time lag through the relay drive circuit 23, the relay circuit 24, and the lamp control circuit 25. That is, the headlamps 1A and 1B are instantly turned on after the vehicle has started. As a result, the driver can drive safely without feeling uneasy. If there is no mono-multi circuit 14a of the first starting intention detecting means 102, AND
The output of the circuit 22 'to become a signal, h' h in FIG ₁
There will be a time lag part.

FIG. 4 is a logic circuit diagram showing another embodiment of the headlamp control device according to the present invention, and FIG. 5 is a time chart diagram of the logic circuit diagram. This embodiment is basically similar to the logic circuit diagram of FIG. 2 above, but in order to deal with the case where the driver performs a different operation from the time chart of FIG. 3 when the vehicle is stopped. belongs to. In the figure, 104 is a second starting intention detecting means,
Reference numeral 31 is a NOT circuit that outputs the c signal of the parking brake detection means 15 as an inverted output (c 'signal), and 32 is a mono-multi circuit that outputs an ON (ON) output (d' signal) for a certain period of time by detecting a foot brake release operation. , 33 to which the c'signal of the NOT circuit 31, the d'signal of the mono-multi circuit 32, and the b signal of the D range detecting means 14 are inputted.
A D circuit, 34 is a NOT circuit for inverting the output of the AND circuit 33 (i signal).

In the device of the present invention having such a configuration, when the driver stops the vehicle, the foot range is initially kept on and the shift lever is not switched, and the forward range is maintained. Since the vehicle speed becomes zero as in the embodiment, the vehicle speed determination means 10
1 is turned on (ON) (a signal is ON). However, since the shift lever remains in the forward range (D range), the b signal of the D range detecting means 14 of the first starting intention detecting means 102 and the b'signal of the mono-multi circuit 14a are always on (ON). The state is maintained. Of course, P range detecting means 17 and N range detecting means 1 related to this
Each of the e to f signals of 8 is also unchanged. However, at this time, regardless of whether or not the parking brake is operated, the d signal of the foot brake detection means 16 is in an on (ON) output state, and therefore the output of the stop operation detection means 103 of the OR circuit 21 is on (ON). ) (G signal ON).

In this state, the AND circuit 33 of the second start intention detecting means 104 has the AND signal 33 of the D range detecting means 14 and the c signal of the parking brake detecting means 15 (at least when the foot brake is stepped on. (O
N), and a signal that turns on when the vehicle starts.)
Is inverted by the NOT circuit 31 and the release operation of the foot brake is detected, and the mono-multi circuit 32 inputs the d'signal which is turned on (ON) for a certain period of time. Here, at the beginning of the vehicle stop, the b signal,
Since all of the c ′ signal and the d ′ signal are turned on (i.e., ON), i through the NOT circuit 34 of the AND circuit 33
The signal is also turned on. Therefore, the a signal, b'signal, i signal, and g input to the AND circuit 22
Since all of the signals are turned on (ON), the output of the AND circuit 22 is also turned on (ON signal) (h signal ON), and the relay drive circuit 23, the relay circuit 24, and the lamp control circuit 25 shown in FIG. , Headlamps 1A, 1
B is automatically dimmed or turned off.

Next, when the driver starts the vehicle from this stopped state, after releasing the parking brake, the foot brake is also released and the accelerator is depressed. Then, the NO of the second starting intention detecting means 104.
The c'signal of the T circuit 31 becomes an on (ON) output, and the monomulti circuit 32 which detects the release operation of the foot brake outputs an on (ON) output (d 'signal) for a certain period of time (d'). D' ₁ part of the signal). by this,
The i signal of the NOT circuit 34 of the second starting intention detecting means 104 is also turned off (i ₁ portion of the i signal). Therefore, in the vehicle speed determination means 101 of the vehicle speed sensor 13,
There is a slight time lag in the a ₁ part of the a signal,
Although the ON state is maintained, at the time of starting, the output of at least the second drive intention detecting means 104 is instantly turned off (OFF), so the AND circuit 22 is turned off (h signal OFF). ), Relay drive circuit 2
Through the relay circuit 24 and the lamp control circuit 25, the headlamps 1A and 1B are automatically turned on without a time lag. In other words, immediately after starting
A and 1B are turned on. As a result, the driver can drive safely without feeling uneasy.

In order to detect the d signal of the normal foot brake, generally, as shown in FIG. 6, an element 42 such as a micro switch provided on the upper end side of rotation of the brake petal 41 is used to turn on (ON)- It is detected directly by turning it off, or by picking up a signal from the vicinity of the device controlled by this element 41 or the device of the brake lamp system. In the present invention, the degree of depression of the brake petal 41 is better. For accurate detection, the piezoelectric element 43 made of a material such as plastic or rubber is provided on the stepping surface of the brake petal 41, and if the foot is simply put on the brake petal 41, the d
It is possible to prevent the signal from being detected. For example,
This makes it possible to correct an erroneous brake output when the vehicle starts running with the brake pedal barely functioning but the brake functioning little. Further, in the case of the present invention, it is not limited to the configuration of the circuit shown in FIG. 2 or FIG. 4, and may be configured as a computer program.

[0022]

As is apparent from the above description, first of all,
According to the headlamp control device according to claim 1 of the present invention, the vehicle speed determination means, the first start intention detection means, and the stop motion detection means are provided, so that not only the vehicle speed but also the start by the driver are determined. And the stop operation by the driver are confirmed, and the headlamp is dimmed or turned off only when all the outputs of these three conditions are on (ON), while the time lag is set when the vehicle starts without any of the conditions. Without, the headlamp can be immediately turned on (including brightening). That is, it is possible to instantly turn on the headlamps when the vehicle starts moving.

Next, according to the headlamp control device of the second aspect of the present invention, the four means of the vehicle speed judging means, the first starting intention detecting means, the second starting intention detecting means, and the stopping operation detecting means are provided. Depending on the availability, not only the vehicle speed but also the driver's willingness to start and the driver's stopping action are confirmed, and the headlamps are turned on only when all the outputs of these four conditions are ON. While dimming or extinguishing the light, the headlamp can be immediately turned on (including the light increase) without a time lag at the time of start when any condition is lacking. That is, also in this case, the headlamp can be instantly turned on at the time of starting the vehicle.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a headlamp control device according to the present invention.

FIG. 2 is a logic circuit diagram showing an embodiment of the device system shown in FIG.

FIG. 3 is a time chart diagram in the logic circuit diagram of FIG.

4 is a logic circuit diagram showing another embodiment of the device system of FIG.

5 is a time chart diagram in the logic circuit diagram of FIG. 3. FIG.

FIG. 6 is a schematic explanatory view showing a configuration near a brake petal.

FIG. 7 is a block diagram showing an example of a conventional headlamp control device.

FIG. 8 is a schematic explanatory view showing an example of a vehicle speed sensor.

FIG. 9 is a schematic explanatory diagram showing the occurrence of a time lag in the vehicle speed sensor during the process of stopping and traveling of the vehicle.

[Explanation of symbols]

 1A, 1B Headlamp 12 Controller 13 Vehicle speed sensor 13a Mono-multi circuit 13b NOT circuit 14 D range detecting means 14a Mono-multi circuit 15 Parking brake detecting means 16 Foot brake detecting means 17 P range detecting means 18 N range detecting means 21 OR circuit 22 AND circuit 23 Relay drive circuit 24 Relay circuit 25 Lamp control circuit 30 Second starting intention detecting means 31 NOT circuit 32 Mono-multi circuit 33 AND circuit 34 NOT circuit 101 Vehicle speed judging means 102 First starting intention detecting means 103 Stop motion detection Means 104 Second Starting Intention Detection Means

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tomonori Watanabe 3-5-28 Mita, Minato-ku, Tokyo Nissan Altia Co., Ltd.

Claims (2)

[Claims] 1. A control device for detecting a stopped state of a vehicle, dimming or extinguishing the headlamp, and turning on the headlamp when starting, and determining a vehicle speed by outputting an on signal when the vehicle speed is zero. Means, first starting intention detecting means for outputting an off signal when the shift position of the sistreva is changed to the forward range, parking brake signal, foot brake signal, parking position detection signal of sistreva and neutral of sistreva A stop operation detecting means for detecting that the vehicle is in the stop operation from at least one of the position detection signals and outputting an on signal during the stop operation, the vehicle speed determining means and the first start intention detection The headlamp is dimmed or turned off only when all outputs of the means and the stop operation detection means are on. Ddoranpu control device. 2. The headlamp control device according to claim 1, wherein the vehicle speed is zero, the shift position of the systole lever is in the forward range, and an off signal is output for a predetermined period after the foot brake is released. Second starting intention detecting means is provided, and both outputs of the second starting intention detecting means and the first starting intention detecting means are turned on (ON), and the vehicle speed determining means and the stop operation detecting means are provided. A headlamp control device characterized in that the headlamp is dimmed or turned off only when is ON.