JPH0223373B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle load control device suitable for controlling a vehicle load such as a headlamp.

[Prior Art] The progress of electronics in automobiles in recent years has been extremely remarkable, and it has become common to control automobile loads by control circuits including microcomputers. In this case, automotive loads such as head lamps, tail lamps (tail lamps, license lamps, etc.) and hazard lamps (also used as turn signal lamps) are switched on when the ignition switch is turned on. However, in recent years, the head lamp or tail lamp, which is energized even when the ignition key is removed, is configured to be energized regardless of whether it is on or off. It has been considered to provide a so-called auto-cut circuit function in conjunction with the control circuit. In other words, when the ignition switch is turned off while the light switch is on, the auto-cut circuit function automatically closes the energized paths of the head lamps and tail lamps after a predetermined period of time (usually about 5 seconds) has elapsed. The cutting operation is to perform a cutting operation, but when such an auto-cutting circuit function is added, it is necessary to store in the control circuit that the cutting operation has been executed.
This is because the light switch is in an on state when the cut operation is activated, so it is necessary to distinguish whether such a state is caused by the cut operation or the driver's operation.
In particular, if you do not remember that a cutting operation was performed by the auto-cutting circuit, if the cutting operation is performed and the light switch is left on, the head lamp will be turned off when the control circuit function starts working. may be turned on inadvertently against the driver's will, and if the driver does not notice such lighting conditions, the original purpose of adding the automatic circuit function will be obstructed.

However, in order to store in the control circuit the fact that the above-mentioned cutting operation has been performed, the power supply to the control circuit must be continuously established just for the purpose of storing the information. There is a problem that power consumption increases. In particular, in automobiles, it is common to use n-channel MOS/IC, which is inexpensive and has good noise resistance, as the microcomputer that constitutes the control circuit. Since ICs have a relatively large power consumption (approximately 200 mA), there is a risk that the battery will over-discharge after being parked for about a week, and this has been an unresolved issue.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and its purpose is to automatically turn the energized path of the vehicular load when the operation switch for operating the vehicular load is forgotten to be returned. Although the vehicle load control has a configuration that includes a function to disconnect the power, there is no need to remember that the above function has been activated, and therefore, there is no need to consume excess power to memorize it. We are in the process of providing equipment.

[Summary of the Invention] The present invention provides a first vehicular load and a second vehicular load, regardless of whether the power switch is on or off, when the first operating switch and the second operating switch are turned on. a control circuit that selectively forms an energizing path, and disconnects the energizing path of the first vehicle load after a predetermined period of time when the power switch is turned off while the first operation switch is on; In the vehicle load control device, the control circuit is configured to turn off its own power supply after the first and second vehicle loads are turned on or off, and after the power supply is turned off, the control circuit When the first and second operation switches are turned on, the power supply is established, and especially when the first operation switch is in the on state at the time when the second operation switch is turned on, the second operation switch is turned on. The structure is such that only the current conduction path for the vehicle load is formed, so that when the operation of the first vehicle load is stopped by the auto-cut circuit function provided in the control circuit, the control circuit The operation of the first vehicular load is not restarted even if the power source of the first vehicle load is established.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a night lighting lamp system, which is a first vehicle load, and includes a head lamp, a tail lamp, a license lamp, etc. Reference numeral 2 denotes a hazard lamp as a second vehicle load, which also serves as a turn signal lamp. Reference numeral 3 designates a passing light, which is also a second vehicle load, and is composed of a filament for the high beam of the headlamp. A light switch 4 is a first operation switch for operating the night illumination lamp system 1, and is configured in a so-called position type, and outputs a lighting signal Sa in response to being turned on. A hazard switch 5 is a second operation switch for operating the hazard lamp 2, which is also configured in a position type, and outputs a hazard signal Sb when the switch is turned on. Reference numeral 6 denotes a passing switch which is also a second operation switch for operating the passing light 3, and this is configured in a so-called momentary type, and when it is turned on, it outputs a passing signal Sc.
is now output. Reference numeral 7 denotes an ignition switch which is a power switch, and when it is turned on, a power-on signal Sd is output.

Now, 8 is a control circuit including a microcomputer, and this is the control circuit that receives the above-mentioned writing signal.
Sa, the hazard signal Sb, the passing signal Sc, the power-on signal Sd, and the night lighting lamp system 1 based on the input states and a pre-stored control program;
It is provided to control the operation of the hazard lamps 2 and passing lights 3. Particularly in this case, the control circuit 8 controls the writing signals Sa,
When either the hazard signal Sb or the passing signal Sc is input, it establishes its own power supply (particularly the power supply for the microcomputer part), and as shown in Fig. 2, which will be described later, the night lighting lamp system 1 , hazard lamp 2 and passing light 3
The power source is configured to be cut off when all of the energizing paths are cut off. The control circuit 8 is also provided with an auto-cut circuit function to prevent the power battery from being consumed due to forgetting to turn off the night lighting lamp system 1. This is achieved through the actions described in . That is, the control circuit 8 changes from a state in which both the writing signal Sa and the power-on signal Sd are input (a state in which the light switch 4 and the ignition switch 7 are turned on) to a state in which the ignition switch 7 is turned off and the power is turned on. When the output of the signal Sd is stopped, the energization path of the night lighting lamp system 1 is cut off after a predetermined period of time, for example, 5 seconds, thereby keeping the night lighting lamp system 1 turned on. When the ignition key is pulled out until 5 seconds later, the night illumination lamp system 1 is automatically turned off.

Therefore, FIG. 2 shows a portion of the control program for the control circuit 8 that is directly related to the gist of the present invention.
Specifically, only the routine part for controlling the operations of the night lighting lamp system 1, hazard lamp 2, and passing light 3 based on the lighting signal Sa, hazard signal Sb, and passing signal Sc is shown. This will be explained below.

That is, in judgment step (a), the writing signal
It is determined whether or not Sa has been input, in other words, whether the light switch 4 has been turned on or not. If "YES", the process moves to the next determination step (b), and "NO" is determined.
In this case, the process proceeds to a judgment step (d) via a light-off step (c) in which the night lighting lamp system 1 is de-energized. In the judgment step (b), the hazard signal
Determine whether or not Sb is input, in other words, whether hazard switch 5 is turned on, and select "YES".
In this case, there is a turn-off step (e) of cutting off the energizing path of the night lighting lamp system 1, a hazard operation step (f) of intermittently forming the energizing path of the hazard lamp 2 and blinking it, and a step (f) of turning off the electricity. 1 flag HF is “1”
The flag changes step (g) to change the flag to a judgment step (h), and if the answer is "NO", the process goes to a hazard stop step (i) to cut off the energized path of the hazard lamp 2, and then goes to a judgment step (j). ). In the judgment step (h), it is judged whether or not the passing signal Sc is inputted, in other words, whether or not the passing switch 6 is turned on. After passing through the passing operation step (k) in which the passing light is formed and turned on, the process moves to the judgment step (l), and in the case of "NO", the passing process stops step (m) in which the energized path of the passing light 3 is cut off. After that, the process moves to the above judgment step (l). In this judgment step (l), it is judged whether all the energized paths of the night lighting lamp system 1, the hazard lamps 2, and the passing lights 3 have been cut off.
If the answer is ``YES'', the process moves to the power-off step (n), which turns off its own power (especially the power to the microcomputer part); if the answer is ``NO'', it moves to another step (not shown) (see above). (including auto-cut circuit function, etc.) and then returns to judgment step (a). Furthermore, in the judgment step (O), the passing signal
This is to determine whether Sc has been input or not.
In the case of ``YES'', there is a turn-off step (o) of cutting off the energizing path of the night lighting lamp system 1, a passing operation step (p) of forming an energizing path of the passing light 3 and turning it on; 2 flag PF
The process proceeds to the judgment step (l) through a flag change step (q) in which the flag is changed to "1", and in the case of ``NO'', the process proceeds to judgment step (r). In this judgment step (r), it is judged whether at least one of the first flag HF and the second flag PF is "0", and if "YES", the energizing path of the night lighting lamp system 1 is turned off. A lighting step (s) for forming and lighting it, a passing stop step (t) for cutting off the energized path of the passing lamp 3, and a flag initialization for returning the first flag HF and the second flag PF to "0". Judgment step after step (u)
If the answer is "NO", the process jumps the lighting step (s) and proceeds to the passing stop step (t).

Furthermore, in the judgment step (d), it is judged whether or not the hazard signal Sb has been input, that is, whether the hazard switch 5 has been turned on, and if "YES", the energizing path for the hazard lamp 5 is formed. The process moves to the judgment step (w) through the hazard operation step (v) in which the hazard lamp 2 is blinked, and if the answer is "NO", the hazard stop step (x) is performed in which the energized path of the hazard lamp 2 is cut off. The process moves to judgment step (w). In this judgment step (w), it is judged whether or not the passing signal Sc has been inputted, that is, whether the passing switch 6 has been turned on, and if "YES", the energizing path for the passing light 3 is formed. The process proceeds through a passing operation step (y) in which the passing lamp 3 is turned on, and then moves to a judgment step (l), and in the case of "NO", a passing stop step (z) in which the energized path of the passing lamp 3 is cut off.
After that, the process moves to judgment step (l).

Next, the operation of the above configuration will be explained. Now, from the state where the power supply of the control circuit 8 is cut off as described later,
For example, when the light switch 4 is turned on and the lighting signal Sa is output, the power supply to the control circuit 8 is established in response, so that the control program shown in FIG. 2 is executed from the initial state. Become. In this case, the writing signal Sa is output, and the first flag HF and second flag PF are output.
are both “0”, so judgment steps (a) and (r)
is judged as “YES” and the hazard signal Sb and passing signal Sc are not output, so the judgment step is
(b) and (j) are now judged as “NO”, so each step is changed from (a)→(b)→(i)→(j)→(r)→
It is executed in the order of (s) → (t) → (u) → (l).
As a result, the night illumination lamp system 1 is turned on in the lighting step (s), and in response to this lighting operation, a determination of "NO" is made in the judgment step (l), and the process returns to the judgment step (a). As a result, a loop is formed that passes through each program executed as described above. Then, when the light switch 4 is turned off from this state, the judgment step
Because (a), (d), and (w) are judged as “NO” in sequence,
Each step is (a)→(c)→(d)→(x)→(w)→
Executed in the order of (z) → (l), especially the light-off step (c)
At this time, the night lighting lamp system 1 is turned off, and in response to this turning off operation, all of the power paths of the night lighting lamp system 1, hazard lamps 2, and passing lights 3 are cut off, and the judgment step ( Since "YES" is determined in l), the process moves to the power-off step (n), where the power to the control circuit 8 is immediately cut off.

Further, when the hazard switch 5 is turned on and the hazard signal Sb is output from a state where the power to the control circuit 8 is temporarily cut off, the power to the control circuit 8 is established in response to this, and each step is turned off. (a)→(c)→(d)→(v)→(w)→(z)→(l)→
A loop is formed that flows as shown in (a), the hazard operation starts at hazard operation step (p), and when the hazard switch 5 is turned off from this state, each step changes from (a) → (c) → (d)→(x)→
The steps are executed in the order of (w) → (z) → (l), and in particular, the hazard operation is stopped at the hazard stop step (x), and in response to this stop operation, the night lighting lamp system 1 and the hazard lamp system are 2. All the energized paths of the passing light 3 are cut off, and the judgment step (l) becomes ``YES''.
The control circuit 8 moves to the power supply cutoff step (n).
The power is suddenly cut off. Furthermore, even when the passing switch 6 is turned on and the passing signal Sc is output from a state where the power to the control circuit 8 is briefly cut off, each step changes from (a) to (c) to (d). →
Executed in the order of (x) → (w) → (y) → (l),
The passing operation is performed in the passing operation step (y), and when the passing switch 6 is turned off from this state, the passing operation is stopped in the passing stop step (z), and the power is turned off or turned off. At step (n), the power to the control circuit 8 is turned off.

In summary, when any one of the lighting signal Sa, hazard signal Sb, and passing signal Sc is turned on, the ignition switch 7
Night lighting lamp system 1 regardless of the on/off status of
The lighting operation, hazard operation, and passing operation are selectively performed, and when all of the above-mentioned operations are subsequently stopped, the power to the control circuit 8 is automatically turned off.

Therefore, when the auto-cut circuit function of the control circuit 8 is activated, the light switch 4 is turned on and the lighting signal Sa is output, and in this case, the hazard switch 5 and the passing switch 6 are turned off. Sometimes, the power to the control circuit 8 is temporarily cut off in the power cutoff step (n). Then, when the hazard switch 5 is turned on, for example, from a state where the power to the control circuit 8 is temporarily cut off and the light switch 4 is turned on, the power to the control circuit 8 is established in response to the turning on. At the same time, judgment steps (a) and (b) are judged as “YES” and judgment step (h) is judged as “NO”, and each step becomes (a)→(b)→(e). )→(f)→(g)→(h)→(k)→(l). As a result, even though the light switch 4 is in the on state, the light off step is not activated.
At (e), the night illumination lamp 1 is kept in the off state, and at the same time, at the hazard operation step (f), the hazard operation is started, and at the same time, at the same time, at the flag change step (g), the first Flag HF will now be changed to "1". Furthermore, when the hazard operation is started in this manner, the determination step (l) is determined as "NO", so that the program loop passing through the hazard start step (f) is maintained. When the hazard switch 5 is turned off from such a hazard operation state, the determination step (b) is determined as "NO" and the hazard stop step (i) is executed, so that the hazard operation is stopped. Then, in the judgment step (r) that is performed after the hazard stop step (i) through the judgment step (j), since the first flag HF is ``1'', it is judged as ``NO''. After this, a passing stop step (t), a flag change step (u) for returning the first flag HF to "0", a judgment step (l), and a power supply cutoff step (n) are sequentially executed. As a result, the power to the control circuit 8 is immediately cut off.

Further, when the passing switch 6 is turned on after the power to the control circuit 8 is briefly turned off and the light switch 4 is turned on as described above, the power to the control circuit 8 is established in response to the turning on. As you get older, you will be able to say "YES" in decision steps (a) and (j) and "NO" in decision step (b).
Each step is (a)→(b)→(i)→(j)→(o)→(p)→
Since steps (q) → (l) are executed in the order, in this case as well, the night illumination lamp 1 is turned off at the turn-off step (o) even though the light switch 4 is in the on state. At the passing operation step (p), the passing operation is started, and at the same time, at the flag change step (q), the second flag PF is changed to "1".
When the passing switch 6 is turned off from such a passing state, in this case, the second
Since flag PF is “1”, judgment step (j)
Since the determination in step (r) is "NO" and the passing step (t) is executed, the above mentioned passing operation is stopped. After this passing stop step (t), the second flag PF is
The flag change step (U) for returning the flag to "0", the judgment step (l), and the power supply cutoff step (n) are executed in sequence, and the power to the control circuit 8 is cut off immediately.

In short, if the night lighting lamp system 1 is turned off by the auto-cut circuit function of the control circuit 8, and the power to the control circuit 8 is turned off while the light switch 4 remains on, then Even if the hazard switch 5 or the passing switch 6 is turned on and power is established for the control circuit 8, the night illumination lamp system 1 will not be accidentally turned on. Therefore, it is no longer necessary to store in the control circuit 8 that the auto cut circuit function has worked, and as described above, the control circuit 8
Even if the power supply is cut off, no support will be produced.

According to the present embodiment described above, when the night lighting lamp system 1 is forgotten to be turned off, that is, when the ignition switch 7 is turned off without returning the light switch 4, the auto cutoff provided in the control circuit 8 is activated. Due to the circuit function, the energization path of the night lighting lamp system 1 can be automatically cut off when 5 seconds have passed after the ignition switch 7 is turned off, thereby preventing unnecessary consumption of the power battery. can be effectively prevented. In addition, since there is no need to remember that such an auto-cut circuit function has worked, there is no need to continuously establish the power supply for the control circuit 8 as in the conventional case, and from this point of view, the power supply battery is also reduced. The selection of elements constituting the control circuit 8 can prevent the wear and tear of the control circuit 8, and also allows the use of low-cost and good noise resistance, such as n-channel MOS/IC, as the microcomputer constituting the control circuit 8. In addition to improving the degree of freedom of
Overall cost reduction can be achieved.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be implemented with various modifications without departing from the gist thereof, for example, other objects may be used as the first and second vehicle loads. be able to.

[Effects of the Invention] According to the present invention, as is clear from the above description, when a user forgets to return the operation switch for operating a vehicle load, the energizing path of the vehicle load is automatically disconnected. In a vehicle load control device that prevents inadvertent consumption of the power source by doing this, it is no longer necessary to remember that the automatic vehicle load shutoff function has been activated. This eliminates unnecessary power consumption and provides excellent effects such as improving the degree of freedom in selecting elements constituting the control circuit.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a block diagram of the electrical configuration, and FIG. 2 is a flowchart showing the main part of the control program by the control circuit. In the figure, 1 is a night lighting lamp system (first vehicle load), 2 is a hazard lamp (second vehicle load), 3 is a passing light (second vehicle load), and 4 is a light switch. (first operation switch), 5 is a hazard switch (second operation switch), 6 is a passing switch (second operation switch), 7 is an ignition switch (power switch), and 8 is a control circuit.

Claims (1)

[Claims] 1 Selectively form energizing paths for the first vehicle load and the second vehicle load regardless of the on/off state of the power switch when the first operation switch and the second operation switch are turned on. , further comprising a control circuit that disconnects the energizing path of the first vehicle load after a predetermined period of time when the power switch is turned off while the first operating switch is in the on state, the control circuit comprising: , after the first and second vehicle loads are turned on or off, their own power is turned off, and after the power is cut off, the first and second operation switches are turned on. In particular, when the first operation switch is in the on state at the time when the second operation switch is turned on, the second operation switch
A vehicle load control device characterized in that it is configured to form only an energizing path for a vehicle load.