JP2001347903A - Power unit of vehicular electrical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the operation of electrical equipment from being interrupted during the operation of a starter motor and then operated, in electrical equipment of vehicular electrical equipment. SOLUTION: Electrical equipment 12a, 12b is connected to a power supply 13 through an electronic control device 11 connected to an ignition switch 10, and the electronic control device connects the electrical equipment to the power supply when the ignition switch is positioned from off to ignition through a starter. When the ignition switch is switched from off to an accessory or ignition, the electronic control device may connect the electrical equipment to the power supply after the specified time passes from the switching time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for an electric device for a vehicle, which connects an electric device such as an audio device such as a radio or a tape recorder, an air conditioner or a lighting device of an instrument to a power source such as a battery.

[0002]

2. Description of the Related Art In a conventional audio power supply device, for example, as shown in FIG.
C, the ignition IG, and the starter ST are controlled by an ignition switch 1 for sequentially switching to each position. When the ignition switch 1 is off and in the starter ST position, the audio device 3 is disconnected from the power supply 4 and When the audio device 3 is in the position, the audio device 3 is connected to the power supply 4 and the audio device 3 is operated. Also, the audio device 3 is disconnected from the power supply 4 only when the ignition switch 1 is in the off-off position, and when the ignition switch 1 is in any other position, the audio device 3 is connected to the power supply 4 to operate the audio device 3. Some of them were.

[0003]

When the engine is started, as shown in FIG. 6 (a), the position of the ignition switch 1 is switched from off-off to accessory ACC and ignition IG in order, and then the starter ST position is set. The engine is started, and after starting, the engine is returned to the ignition IG. In this case, in the first prior art described above,
When the ignition switch 1 is switched to the accessory ACC, the audio device 3 is turned on to produce sound, and when the ignition switch is switched to the ignition IG, the audio device 3 is kept on. However, the starter motor is operated by switching to the starter ST. During this time, the audio device 3 is turned off and the sound is interrupted, and when the engine is started and the operation of the starter motor is stopped, the audio device 3 is turned on again and the sound is generated. Also, as shown in FIG. 6 (b), the ignition switch 1 is switched from the state where the audio equipment 3 is operated without operating the engine.
Is switched to the starter ST and the starter motor is operated, the audio device 3 is turned off and the sound is interrupted during the operation of the starter motor, and the audio device 3 is turned on again after the starter motor is operated. Voice is generated. The sound of the audio once generated is interrupted during the operation of the starter motor, and is generated again after the operation is completed, which is unpleasant for the user, and the number of unnecessary ON / OFF operations of the audio device 3 is increased. There is a problem that the durability is adversely affected.

[0004] In the second prior art as well, a large current flows from the power supply 4 to the starter motor while the ignition switch 1 is in the starter ST position and the starter motor is operated, and the voltage of the power supply 4 decreases. Since the audio equipment 3 does not actually operate due to the drop, the sound of the audio once generated is still interrupted during the operation of the starter motor, and is still unpleasant for the user. In addition, such problems are not limited to audio equipment, and lighting of instruments such as a blower motor of an air conditioner and a speedometer does not operate due to a voltage drop while the starter motor is being operated with the ignition switch as a starter position. A similar problem arises: giving anxiety to the child.

[0005] The present invention solves such a problem by preventing the electrical equipment once turned on from being turned off while the ignition switch is in the starter position in order to start the engine, and also starts the engine. An object of the present invention is to make it possible to immediately operate an electric device when it is desired to use only the electric device without using the electric device.

[0006]

According to the present invention, there is provided a power supply device for a vehicle electric device for connecting an electric device for a vehicle to a power source such as a battery. An electronic control device is provided for connecting the electrical equipment to a power source when the ignition switch for sequentially switching to each position is turned off and the ignition device is located at the ignition via the starter.

[0007] In the electronic control device according to the above-mentioned invention, when the ignition switch is switched from off to accessory or ignition, it is preferable to connect the electrical equipment to a power source after a lapse of a predetermined time from the time of the switch.

A power supply device for a vehicle electric device according to the present invention is a power supply device for a vehicle electric device for connecting the vehicle electric device to a power supply such as a battery, and sequentially switches off, accessory, ignition and starter positions. An electronic control unit is provided for connecting the electrical equipment to a power source after a predetermined time has elapsed from the time when the ignition switch is switched from off to accessory.

When the ignition switch is switched to the starter, the electronic control device according to the above-mentioned invention returns the ignition switch from the starter to the ignition regardless of the elapsed time from the time when the ignition switch was switched to the accessory before being turned off. Preferably, the electrical equipment is connected to the power supply at a point in time.

In the electronic control device according to the second aspect of the invention, when the ignition switch is switched from the accessory to the ignition, the ignition switch is switched from the ignition regardless of the elapsed time from the time when the switch was turned off to the accessory before. It is preferable to connect the electrical equipment to the power supply when returning to the accessory. Alternatively, the electronic control device according to the second aspect of the present invention is characterized in that when the ignition switch is switched from off to accessory, from the accessory to off, and from the off to the accessory again, at the time of the first switch from off to accessory and after If the time difference between the switch off and the accessory is shorter than the specified time, the electrical equipment is turned on at the later switch off to the accessory, regardless of the elapsed time from the first switch off to the accessory. May be connected.

The invention of each of the preceding aspects further comprises an auxiliary power supply which is charged by a power supply and which can supply electric equipment instead of the power supply when the ignition switch is switched to a starter and the voltage of the power supply drops. Is preferred.

[0012] Further, the electric equipment of the invention of the preceding paragraphs is a radio,
It is preferable to use an audio device such as a tape recorder.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first embodiment shown in FIGS.
An embodiment of the present invention will be described. As shown in FIG. 1, electrical equipment 12a, 12b (audio equipment 1 such as a radio, a tape recorder, a compact disc device, etc.)
2a and the blower motor 12b) are the electronic control unit 11
Is connected to a power source 13 such as a battery. The microcomputer 11a of the electronic control unit 11 has an off-OF
F, an accessory ACC for activating each of the electrical equipment 12a, 12b, etc., an ignition IG for activating the ignition circuit of the engine, and an ignition switch 10 for sequentially switching to respective positions of a starter ST for activating the starter motor of the engine. , The microcomputer 11a responds to each position of the ignition switch 10 by using
The connection state between the power supplies 2a and 12b and the power supply 13 is controlled.

An auxiliary power supply 14 is provided in parallel with a power supply circuit for the audio equipment 12a. The auxiliary power supply 14 is capable of supplying power to the audio device 12a only for a short time (for example, about 2 seconds) in which the ignition switch 10 is charged to the starter ST position by being charged by the power supply 13. In the first embodiment, It is a capacitor with a considerable capacity. A rectifier (not shown) is provided on the charge path to the capacitor 14 for enabling charging from the power supply 13 but preventing discharge through a starter motor or the like connected to the power supply 13.

Next, the electronic equipment 12a, 1a by the microcomputer 11a of the electronic control unit 11 in the first embodiment.
The content of control of the connection state between the power supply 2b and the power supply 13 will be described. First, when the ignition switch 10 is off and off, the microcomputer 11a disconnects the audio equipment 12a and the blower motor 12b from the power supply 13. As shown in FIG. 2 (a), when the ignition switch 10 is turned off and turned off via the accessory ACC and the ignition IG, the starter ST position is quickly set, and then the microcomputer 11a is switched to the ignition IG position.
When the ignition switch 10 is switched from the starter ST position to the ignition IG position, the electric equipments 12a and 12b are connected to the power supply 13 and turned on. Also, as shown in FIGS. 2B and 2C, when the ignition switch 10 is switched from the OFF-OFF to the accessory ACC position and is held at that position, and when the ignition switch 10 is switched from the OFF-OFF to the ignition through the accessory ACC. When switched to the IG position and held at that position, the microcomputer 11a counts the elapsed time from the completion of each switching, and if the elapsed time exceeds a predetermined time S1, the microcomputer 11a switches the electric devices 12a and 12b to the power supply 13. It is connected and turned on.

In the first embodiment, when the ignition switch 10 is turned off and off, the engine is quickly set to the starter ST position via the accessory ACC and the ignition IG, and the engine is switched to the ignition IG position after the start. The electric devices 12a and 12b are not connected to the power supply 13 until the ignition switch 10 is switched to the ignition IG position, and the ignition IG
Are connected at the time of switching to the position,
When b is turned on, a sound is generated and a blower motor or the like operates. Also, when the ignition switch 10 is set to the starter ST position without being promptly operated, even if the ignition switch 10 is held at the accessory ACC position and / or the ignition IG position for a short time, if the holding time is shorter than the predetermined time S1, The devices 12a and 12b are not connected to the power supply 13 until the ignition switch 10 is switched to the ignition IG position, and the starter ST
It is connected at the time of switching from the position to the ignition IG position. The predetermined time S1 is a maximum value (for example, 2 seconds) of such a holding time normally performed.

In the first embodiment, the ignition switch 10 is turned off and the accessory AC is turned off.
When switching to the C position and holding at that position, or when switching from OFF-OFF to the ignition IG position via the accessory ACC and holding at that position, the elapsed time from the completion of each switching exceeds the predetermined time S1. For example, the microcomputer 11a connects the electric devices 12a and 12b to the power supply 13. Therefore, without turning the ignition switch 10 to the starter ST position to start the engine, the audio device 12a is turned on to generate sound,
Also, the blower motor and the like 12b can be operated.

Next, a second embodiment will be described. The block diagram of the second embodiment is the same as the block diagram of the first embodiment shown in FIG.
The content of the control of the connection state between the electric equipments 12a and 12b and the power supply 13 by the microcomputer 11a is different from that of the first embodiment, and therefore, this difference will be mainly described.

Also in the second embodiment, when the ignition switch 10 is off and off, the microcomputer 11a
Disconnects the audio device 12a and the blower motor 12b from the power supply 13. As shown in FIG. 3A, when the ignition switch 10 is turned off and the accessory A is turned off.
If the switching is made to the CC, the microcomputer 11a measures the elapsed time from the switching time, and the elapsed time is a predetermined time S
If it exceeds 1, both electric equipments 12a and 12b are connected to power supply 13 and turned on. In normal engine start operation,
The ignition switch 10 may be held for a short time at the position of the accessory ACC. The predetermined time S1 is as described above. Also, as shown in FIG. 3B, the ignition switch 10 is turned off (accessory ACC).
If the microcomputer 11a is switched to the ignition IG and then returned to the accessory ACC, the microcomputer 11a cancels the measurement of the elapsed time from the time of switching from the OFF-OFF to the accessory ACC, and regardless of the elapsed time, When the ignition IG is returned to the accessory ACC, the electrical equipments 12a and 12b are connected to the power supply 13 and turned on. FIG. 3B shows a case where the ignition switch 10 is immediately switched to the ignition IG without being temporarily stopped by the accessory ACC. However, even when the ignition switch 10 is temporarily stopped by the accessory ACC, if the stop time is within a predetermined time S1. , Microcomputer 11a
Cancels the time measurement of the predetermined time S1, and connects both electric equipments 12a and 12b to the power supply 13 to turn on when the ignition switch 10 is returned from the ignition IG to the accessory ACC.

As shown in FIG. 3 (c), when the ignition switch 10 is switched from OFF-OFF to accessory ACC, from accessory ACC to OFF-OFF, and again from OFF-OFF to accessory ACC, the first OFF is performed. If the time difference S2 between the time of switching from OFF to the accessory ACC and the time of subsequent switching from OFF to the accessory ACC is shorter than the predetermined time S1, the microcomputer 1
1a cancels the timing of the elapsed time from the time of switching from the first OFF-OFF to the accessory ACC, and regardless of this elapsed time, the subsequent OFF-OFF to the accessory ACC.
At the time of switching to, both electric equipments 12a and 12b are connected to the power supply 13 and turned on.

Further, when the ignition switch 10 is switched to the starter ST, the microcomputer 11a cancels the timing of the elapsed time from the time when the ignition switch 10 was switched to the accessory ACC after the OFF-OFF operation, and the microcomputer 11a has no relation to the elapsed time. When the starter ST returns to the ignition IG, the electric devices 12a and 12b are connected to the power supply 13 and turned on.

Next, in the second embodiment, as shown in FIG. 6A of the prior art, the position of the ignition switch 10 is switched from OFF to accessory ACC and ignition IG in order. The operation in the case where the engine is started as the starter ST and the engine is returned to the ignition IG after the start is described with reference to FIG. If the time difference S3 between the time when the ignition switch 10 is switched from OFF-OFF to the accessory ACC and the time when the accessory ACC is switched to the ignition IG is within the predetermined time S1, the timing of the predetermined time S1 is canceled halfway. While the switch 10 is sequentially switched from OFF-OFF to the accessory ACC, the ignition IG, and the starter ST,
The power supply 2a and 12b are not connected to the power supply 13, and the audio equipment 12a is not turned on to generate sound, and the blower motor and the like 12b are turned on and the blower motor of the air conditioner is not operated. Only when the ignition switch 10 is returned to the ignition IG after the start of the engine, the electric devices 12a and 12b are connected to the power supply 13 for the first time, the electric devices 12a and 12b are turned on to generate sound, and the blower motor and the like operate. .

Therefore, when the ignition switch 10 is switched from the OFF-OFF to the starter ST relatively quickly, as is performed when the engine is normally started,
Once the voice of the audio or the operation of the blower motor of the air conditioner is not interrupted on the way, there is no discomfort or anxiety to the user, and both electric components are turned on at the moment when the ignition switch 10 is returned to the ignition IG. Since the devices 12a and 12b are turned on and sound is generated or a blower motor or the like operates, the user's sense of comfort increases. In addition, since the number of unnecessary ON / OFF operations of the electrical equipments 12a and 12b is reduced, their durability can be improved.

When it is desired to operate only the electric equipment 12a and 12b without starting the engine, the ignition switch 10 is turned off and the accessory AC is turned off.
By simply switching to C, the electric devices 12a and 12b are not connected to the power supply 13 and do not operate unless the predetermined time S1 has elapsed. However, in the second embodiment, when the ignition switch 10 is returned from the ignition IG to the accessory ACC, the off-off performed before that is performed.
Irrespective of the elapsed time from the time of switching from the ignition IG to the accessory ACC, the two electrical devices 12a and 12b are connected to the power supply 13 at the time of returning from the ignition IG to the accessory ACC, so that the ignition switch 10 is turned off. To the ignition IG and return to the accessory ACC promptly, so that the electrical equipment 12a, 12a,
12b can be connected to a power supply 13 to produce sound and to operate air conditioners. As a result, the convenience when using both electric equipments 12a and 12b is improved.

In the second embodiment, the ignition switch 10 is switched from off-off to accessory ACC, then back to off-off, and the accessory AC is turned on again.
C can be performed quickly without waiting for the predetermined time S1 to elapse.
a, 12b can be activated. This also improves the convenience when using both electric devices 12a and 12b. It is not necessary to provide both of these two configurations for immediately operating both electrical devices 12a and 12b, and it is possible to provide only one of them.

In a diesel vehicle, it is desirable to preheat the fuel and the cylinder before starting the engine. This preheating is performed by setting the ignition switch to the ignition position, and when the preheating indicator lamp lit at this time is turned off. Usually, the engine is started with the ignition switch as a starter position. When the above-described conventional technology is applied to such a diesel vehicle, the time of the ignition position in which the electric components 12a and 12b operate becomes longer, and when the user is accustomed to the sound or the sound of the blower motor, the operation thereof is performed only during startup. Because of the interruption, the discomfort and anxiety experienced by the user increases.
However, according to the above-described second embodiment, only when the ignition switch is returned to the ignition state after the start of the engine, both the electronic devices 12a and 12b are connected to the power source, the audio device generates sound, and the air conditioner operates. The second embodiment is particularly effective for a diesel vehicle. In this case, the predetermined time S1
Is the maximum value of the remaining heat time.

In the second embodiment, when the ignition switch 10 is off and the starter ST is in the position of the starter ST, the electronic control unit 11 controls the two electronic devices 12a and 12a.
b is cut off from the power supply 13, the present invention cuts off both electric equipments 12a and 12b from the power supply 13 only when the ignition switch 10 is in the off-off position, and turns off both electric equipments when the ignition switch 10 is in any other position. Electrical equipment 12a, 1
2b may be connected to the power supply 13. Even in this case, the engine starts and the ignition switch 1
Since the two electrical devices 12a and 12b produce sound only at the moment when the value is returned to the ignition IG, the user's feeling of comfort increases without giving the user discomfort similarly to the second embodiment.

In the prior art described above, the audio equipment 3 is operated without operating the engine.
When the engine is started by switching the ignition switch 1 to the starter ST position, there is a problem that the audio device 3 is turned off and the sound is interrupted during the operation of the starter motor (see FIG. 6B). However, in the above-described embodiments, since the audio device 12a is provided with the auxiliary power supply 14 such as a capacitor capable of supplying power for a short time, the sound is interrupted even during the operation of the starter motor in such a state. Never. Audio equipment 1
2a is always connected to the power supply 13 except when the ignition switch 10 is in the off-off position.

The operation in this case will be described with reference to FIG.
As shown in (1), when the ignition switch 10 is set to the accessory ACC position and the audio device 12a is operated without operating the engine, the capacitor 14 is charged from the power supply 13 via the rectifier described above. If the starter motor is operated by switching the ignition switch 10 from the ignition IG position to the starter ST position in this state, a large current flows from the power supply 13 to the starter motor during the operation, and the voltage of the power supply 13 decreases. Since the power is supplied from the capacitor 14, the operation of the audio device 12a does not stop and the sound is not interrupted.

The auxiliary power supply 14 is provided only for the audio equipment 12a having a small power supply capacity. In this case, the low-cost auxiliary power supply 14 such as a capacitor is provided.
Is enough. However, the present invention can also be implemented by providing an auxiliary power supply 14 capable of supplying power to the entire electrical devices 12a and 12b.

[0031]

According to the present invention, the electrical equipment is activated when the ignition switch is turned off and is located at the ignition via the starter and does not operate before that time. Is not interrupted on the way, the user does not feel discomfort or anxiety, and the number of unnecessary ON / OFF operations of the electrical equipment is reduced, so that the durability of the electrical equipment can be improved.

According to the present invention, when the ignition switch is switched from off to accessory or ignition, the electrical equipment is connected to the power source after a lapse of a predetermined time from the time when the ignition switch is switched. Alternatively, since the electrical device is not connected to the power supply until a predetermined time has elapsed from the time of switching to the ignition, the electrical device does not turn on and start operating. Therefore, if the ignition switch is switched to the starter and the engine is started during that time, the electrical equipment is turned on and starts operating only after the engine is started. The interruption does not give the user a feeling of discomfort or anxiety, and the number of unnecessary ON / OFF operations of the electrical equipment is reduced, so that the durability of the electrical equipment can be improved. Also, if a predetermined time has elapsed since the ignition switch was turned off to switch to the accessory or the ignition, the electrical equipment is connected to the power source, so that the electrical equipment can be operated without starting the engine.

Further, according to the present invention, the electric device is connected to the power supply after a predetermined time has elapsed from the time when the ignition switch is switched from off to the accessory, and the predetermined time from the time when the ignition switch is switched from off to the accessory. Since the electrical device is not connected to the power supply until the time has elapsed, the electrical device does not turn on and start operating. Therefore, if you switch the ignition switch to the starter and start the engine during that time,
Since the electrical devices are turned on and start operating only after the engine is started, the user does not feel discomfort or anxiety by interrupting the operation of the electrical devices once it has occurred. Since the number of ON / OFF times is reduced, the durability of the electrical equipment can be improved.

When the ignition switch is switched to the starter, the electrical equipment is connected to the power supply at the time when the ignition switch is returned to the starter, regardless of the elapsed time from the time when the ignition switch is switched to the accessory. According to the present invention as described above, the electrical equipment is turned on and the operation is started at the moment when the ignition is returned from the starter to the ignition, so that the user's sense of comfort is further increased.

When the ignition switch is switched from the accessory to the ignition, the electric device is switched to the power supply at the time when the ignition is returned to the accessory, regardless of the elapsed time from the time when the switch was turned off to the accessory. According to the present invention in which the connection is established, the operation of switching the ignition switch from off to ignition and then returning to the accessory is performed promptly,
The electrical equipment can be operated immediately without waiting for the elapse of the predetermined time. When the ignition switch is switched from off to accessory, from accessory to off, and again from off to accessory, the time difference between the first switching from off to accessory and the subsequent switching from off to accessory is different. If the time is shorter than the predetermined time, the ignition switch according to the present invention in which the electrical device is connected to the power source at the time of the subsequent switching from the off state to the accessory, regardless of the elapsed time from the time of the first switching off to the accessory, Is switched from off to the accessory, then turned off, and the operation for switching back to the accessory is quickly performed, so that the electrical equipment can be operated immediately without waiting for the elapse of the predetermined time.

[0036] In the invention of each of the preceding items, the apparatus further comprises an auxiliary power supply that is charged by the power supply and is capable of supplying electric equipment instead of the power supply when the ignition switch is switched to the starter and the voltage of the power supply drops. According to this, even when the ignition switch is switched to the starter during the operation of the electric equipment and the voltage of the power supply drops, the operation of the electric equipment is not interrupted, so that the user's sense of comfort is further increased.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a power supply device for a vehicle electrical device according to the present invention.

FIG. 2 is a time chart for explaining the operation of the electronic control device of the first embodiment shown in FIG.

FIG. 3 is a time chart illustrating an operation of an electronic control unit according to a second embodiment of the present invention.

FIG. 4 is a time chart showing the operation of the second embodiment shown in FIG.

FIG. 5 is a block diagram illustrating an example of a power supply device of a vehicle electrical device according to the related art.

FIG. 6 is a time chart showing the operation of the conventional technique shown in FIG.

[Explanation of symbols]

10: ignition switch, 11: electronic control unit, 1
2a, 12b: electrical equipment, 12a: audio equipment, 1
3 ... power supply, 14 ... auxiliary power supply.

Claims (8)

[Claims] In a power supply device for a vehicle electrical device for connecting the vehicle electrical device to a power source such as a battery, an ignition switch for sequentially switching off, an accessory, an ignition, and a starter is switched from off to an ignition via a starter. A power supply device for an electric device for a vehicle, comprising: an electronic control device that connects the electric device to the power supply when the electric device is located at a position. 2. The electronic control device according to claim 1, wherein when the ignition switch is switched from off to an accessory or an ignition, the electronic device is connected to the power supply after a lapse of a predetermined time from the time when the ignition switch is switched. Item 2. A power supply device for a vehicle electrical device according to item 1. 3. A power supply device for a vehicle electrical device for connecting the vehicle electrical device to a power source such as a battery, wherein the ignition switch for sequentially switching off, accessory, ignition, and starter positions is switched from off to accessory. A power supply device for a vehicular electrical device, comprising: an electronic control device that connects the electrical device to the power supply after a predetermined time has elapsed. 4. When the ignition switch is switched to a starter, the electronic control device returns the ignition switch from the starter to the ignition regardless of a time elapsed from a time point when the ignition switch is switched to an accessory. The power supply device for a vehicle electrical device according to claim 3, wherein the electrical device is connected to the power supply at a point in time. 5. The electronic control device according to claim 1, wherein when the ignition switch is switched from the accessory to the ignition, the electronic control device switches the ignition switch from the ignition to the accessory irrespective of an elapsed time from a time point at which the switch was turned off to the accessory. The power supply device for an electric device for a vehicle according to claim 3, wherein the electric device is connected to the power source when the electric device is returned. 6. The electronic control unit switches the ignition switch from off to accessory, switches from accessory to off, and switches from off to accessory again. If the time difference at the time of switching from OFF to the accessory is shorter than the predetermined time, regardless of the elapsed time from the time of the first switching from OFF to the accessory, the electric device is switched at the later switching time from OFF to the accessory. The power supply device for an electric device for a vehicle according to claim 3, wherein the power supply device is connected to the power supply. 7. An auxiliary power supply which is charged by the power supply and is capable of supplying power to the electric equipment instead of the power supply when the ignition switch is switched to a starter and the voltage of the power supply drops. The power supply device for an electric device for a vehicle according to any one of claims 1 to 6. 8. The power supply device for an electric device for a vehicle according to claim 1, wherein said electric device is an audio device such as a radio or a tape recorder.