JP2015113030A - Power supply controller for vehicle and power supply control method for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply controller for vehicle, capable of operating equipment normally at once, when vehicle speed reaches equipment operation vehicle speed, and improving power saving effect.SOLUTION: The power supply controller for vehicle blocks power supply to pieces of equipment 1a, 1b which are preset from a battery, in a preset vehicle speed range, and when the vehicle speed becomes power supply restoration vehicle speed, power supply to the pieces of equipment 1a, 1b is restarted. The power supply controller for vehicle comprises: a change degree acquisition part 4 for acquiring change degree of vehicle speed; a power supply restoration timing calculation part 4 for calculating power supply restoration timing for operating the pieces of equipment 1a, 1b normally at the constant equipment operation vehicle speed; and power opening/closing parts 4, 3a, 3b for restarting power supply to the pieces of equipment at the power supply restoration timing.

Description

  The present invention relates to an automotive power supply device that selects power supply according to vehicle speed to reduce power consumption.

  In order to reduce the fuel consumption of an automobile, it is useful to reduce the load on the engine by reducing the power consumption of the battery and shortening the time for driving the alternator by the driving force of the engine.

  The equipment to which electric power is supplied from the battery includes equipment that does not require operation when the vehicle speed exceeds a predetermined speed and equipment that does not require operation when the vehicle speed falls below a predetermined speed. A power supply control device that cuts off the power supply from the battery to the equipment and reduces the power consumption of the battery in a speed range where no operation is required has been put into practical use.

  Power supply for equipment that does not require operation when the vehicle speed exceeds the predetermined speed, in other words, equipment that supplies power when the vehicle speed drops below the predetermined speed (for example, an electric trunk lid opening / closing device, an electric sliding door opening / closing device, etc.) An example of the operation of the control unit of the apparatus will be described with reference to FIG.

  When the vehicle speed V gradually decreases and reaches a preset power recovery vehicle speed Vr, power supply to the equipment is started. Then, in the equipment for which the supply of power has been started, the normal operation can be performed after the fixed equipment activation time t1 has elapsed.

Next, when the vehicle speed V reaches the preset equipment operation vehicle speed Vd, the control unit controls the equipment to operate normally.
The equipment activation time t1 is, for example, a rise time until the power supply voltage supplied to the microcomputer mounted on the equipment reaches a predetermined voltage, and a reset release time for releasing the reset state of the microcomputer after the power supply reaches the predetermined voltage. This includes the time to initialize the microcomputer after reset release. And this equipment starting time t1 always requires a fixed time.

Patent Document 1 discloses an in-vehicle power saving device that performs control so as to suppress power consumption during low-speed traveling in the low power consumption mode.
Patent Document 2 discloses a vehicle control device that stops power supply from a battery during low-speed traveling or high-speed traveling according to a load.

Japanese Patent No. 4011374 JP 2012-218451 A

  In the control unit that performs the operation shown in FIG. 10, the equipment can be operated after the equipment activation time t1 after the vehicle speed V reaches the power recovery vehicle speed Vr, but at the waiting time t2 until the vehicle speed V reaches the equipment operation vehicle speed Vd. It will supply unnecessary power to the equipment. Therefore, the power saving effect is not sufficient.

  In addition, as shown in FIG. 11, when the vehicle speed V is suddenly decelerated, the equipment activation time t1 cannot be ensured from when the vehicle speed V reaches the power recovery vehicle speed Vr until the equipment operation vehicle speed Vd is reached.

Then, when the equipment operation vehicle speed Vd is reached, there is a problem that an inoperable time t3 in which the equipment cannot be normally operated occurs.
Therefore, if the power recovery vehicle speed Vr is set high so that the equipment activation time t1 can be secured until the equipment operation vehicle speed Vd is reached even when the vehicle speed V is suddenly decelerated, the cutoff time of the power supplied to the equipment is reduced. Since it becomes short, sufficient power saving effect cannot be obtained.

Patent Documents 1 and 2 do not disclose a configuration in which the equipment is normally operated immediately when the vehicle speed reaches the equipment operation vehicle speed.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide an automotive power supply control device that can immediately operate equipment when the vehicle speed reaches the equipment operation vehicle speed to improve the power saving effect. It is to provide.

  A power supply control device for an automobile that solves the above problems shuts off power supply from a battery to a preset equipment within a preset vehicle speed range, and when the vehicle speed becomes a power recovery vehicle speed, In a power supply control device for an automobile that resumes supply, a degree-of-change acquisition unit that acquires a degree of change in vehicle speed, and a power supply return timing for causing the equipment to normally operate at a constant equipment operation vehicle speed based on the degree of change And a power switching unit for restarting power supply to the equipment at the power recovery timing.

With this configuration, the power supply return timing is adjusted according to the degree of change in the vehicle speed, and the equipment can normally operate at the timing when the equipment operation vehicle speed is reached.
Further, in the above-described automobile power supply control device, the degree of change acquisition unit calculates a deceleration of the vehicle speed based on the change in the vehicle speed, and the power supply return timing calculation unit calculates the equipment operation based on the deceleration. Prior to reaching the vehicle speed, it is preferable to calculate a power return vehicle speed at which the equipment activation time can be secured, and the power switching unit resumes power supply to the equipment at the power return vehicle speed.

With this configuration, the power supply to the equipment is resumed at the power recovery vehicle speed that enables the equipment activation time to be secured prior to reaching the equipment operating vehicle speed in accordance with the deceleration of the vehicle speed.
Further, in the above-described automobile power supply control device, the change degree acquisition unit calculates a deceleration of the vehicle speed based on the change in the vehicle speed, and the power recovery timing calculation unit calculates the equipment operation time based on the deceleration. It is preferable to calculate a power return time at which the equipment activation time can be secured before the power switching unit restarts the power supply to the equipment at the power return time.

According to this configuration, the power supply to the equipment is resumed at the power return time at which the equipment activation time can be secured prior to reaching the equipment operation time according to the deceleration of the vehicle speed.
Further, in the above-described automobile power supply control device, the change degree acquisition unit calculates an acceleration of the vehicle speed based on the change in the vehicle speed, and the power supply return timing calculation unit calculates the equipment operation vehicle speed based on the acceleration. It is preferable to calculate a power recovery vehicle speed that can secure the equipment activation time prior to reaching the power, and the power switching unit resumes power supply to the equipment at the power recovery vehicle speed.

With this configuration, the power supply to the equipment is resumed at the power recovery vehicle speed at which the equipment activation time can be secured prior to reaching the equipment operating vehicle speed according to the acceleration of the vehicle speed.
In the above-described automobile power supply control device, the degree-of-change acquisition unit calculates an acceleration of the vehicle speed based on the change in the vehicle speed, and the power supply return timing calculation unit prior to the equipment operation time based on the acceleration. It is preferable that a power supply return time at which the equipment activation time can be secured is calculated, and the power switching unit resumes power supply to the equipment at the power supply return time.

According to this configuration, the power supply to the equipment is resumed at the power return time at which the equipment activation time can be secured prior to reaching the equipment operation time according to the acceleration of the vehicle speed.
Further, in the above-described automobile power supply control device, it is preferable that the power switching unit includes a relay that opens and closes power supplied to a plurality of equipments based on a relay control signal output from the control unit.

With this configuration, power is supplied to the equipment through a relay that is opened and closed based on a power control signal.
Further, in the above-described automotive power control device, the power switching unit includes a control unit that outputs a power control signal to a plurality of equipments via a communication line, and power supplied to each equipment based on the power control signal. It is preferable to provide an opening / closing device that opens and closes.

With this configuration, the power supply is opened / closed by the opening / closing device provided in the equipment, based on the communication signal input to the equipment via the communication line.
Further, in the above-described automobile power supply control device, the power switching unit outputs a communication signal to the other equipment via a communication line and a relay that opens and closes power supplied to one equipment among the plurality of equipment. It is preferable to include a control unit and an opening / closing device that opens and closes power supplied to the other equipment based on the communication signal.

With this configuration, power supplied to one of the plurality of equipment is opened and closed by a relay, and power supplied to the other equipment is opened and closed by an opening / closing device controlled by a communication signal.
A power supply control device for an automobile that solves the above problems shuts off power supply from a battery to a preset equipment within a preset vehicle speed range, and when the vehicle speed becomes a power recovery vehicle speed, In a power control method for an automobile for resuming supply, a degree of change in vehicle speed is acquired, and a power supply return timing for operating the equipment normally at a constant equipment operation vehicle speed is calculated based on the degree of change, and the power supply return timing It is preferable to restart the power supply to the equipment.

  With this configuration, the power supply return timing is adjusted according to the degree of change in the vehicle speed, and the equipment can normally operate at the timing when the equipment operation vehicle speed is reached.

  According to the automobile power supply control device of the present invention, when the vehicle speed reaches the equipment operation vehicle speed, the equipment can be immediately operated normally to improve the power saving effect.

It is a block diagram which shows the power supply control apparatus for motor vehicles of 1st embodiment. It is a flowchart which shows operation | movement of the control part of 1st embodiment. It is explanatory drawing which shows operation | movement of the control part of 1st embodiment. It is explanatory drawing which shows operation | movement of the control part of 1st embodiment. It is explanatory drawing which shows operation | movement of the control part of 1st embodiment. It is a flowchart which shows operation | movement of the control part of 2nd embodiment. It is a block diagram which shows 3rd embodiment. It is a block diagram which shows 4th embodiment. It is a block diagram which shows 5th embodiment. It is explanatory drawing which shows operation | movement of a prior art example. It is explanatory drawing which shows operation | movement of a prior art example.

(First embodiment)
Hereinafter, a first embodiment of an automobile power supply control device will be described with reference to the drawings.
As shown in FIG. 1, power is supplied to a plurality of equipments 1 a and 1 b from a battery 2 via relays 3 a and 3 b, and the relays 3 a and 3 b are controlled to open and close by a relay control signal output from the control unit 4. Is done.

  The equipments 1a and 1b are equipments that need to be supplied with power only when the vehicle speed is equal to or lower than a certain speed, such as an electric trunk lid opening / closing device and an electric sliding door opening / closing device.

  A vehicle speed sensor 5 is connected to the control unit 4, and the vehicle speed sensor 5 outputs a vehicle speed V obtained by converting the traveling speed of the automobile into an electric signal to the control unit 4. And the control part 4 operate | moves based on the program set beforehand, and controls the opening and closing of the said relays 3a and 3b.

  In this embodiment, when the vehicle speed V exceeds a preset speed, the relays 3a and 3b are controlled to be in a non-conductive state by the relay control signal output from the control unit 4, and the equipment 1a and 1b are connected. Power supply is cut off.

  Further, when the vehicle speed V is equal to or lower than a preset speed, the relays 3a and 3b are controlled to be in a conductive state by a relay control signal output from the control unit 4, and power is supplied to the equipment 1a and 1b.

  The operation of the control unit 4 at the time of deceleration of the vehicle speed will be described with reference to FIGS. 2 and 3. The control unit 4 always detects the vehicle speed V output from the vehicle speed sensor 5 (step 1), and the vehicle speed V The deceleration is calculated based on the change (step 2). Then, the power recovery vehicle speed Vr is calculated based on the preset equipment operation vehicle speed Vd and the calculated deceleration (step 3), and this operation is repeated until the vehicle speed V reaches the power recovery vehicle speed Vr (step 4). ).

Next, when the vehicle speed V reaches the power return vehicle speed Vr, the control unit 4 turns on the relays 3a and 3b to turn on the equipment 1a and 1b (step 5), and the operation ends.
Next, the operation of the control unit 4 as described above will be described.

  As shown in FIG. 3, when the vehicle speed V decelerates, the power recovery vehicle speed Vr1 that can secure the equipment activation time t1 from the equipment operation vehicle speed Vd based on the preset equipment operation vehicle speed Vd and the calculated deceleration is obtained. calculate. Then, when the vehicle speed V reaches the power return vehicle speed Vr1, supply of power to the equipment 1a, 1b is started.

Therefore, when the vehicle speed V reaches the equipment operation vehicle speed Vd, the equipment 1a, 1b can immediately operate normally.
As shown in FIG. 4, when the deceleration of the vehicle speed V is large, the power source that can secure the equipment activation time t1 from the equipment operation vehicle speed Vd based on the equipment operation vehicle speed Vd set in advance and the calculated deceleration. A return vehicle speed Vr2 is calculated. When the vehicle speed V reaches the power return vehicle speed Vr2, the supply of power to the equipment 1a and 1b is started. The power recovery vehicle speed Vr2 is higher than the power recovery vehicle speed Vr1 shown in FIG.

  As shown in FIG. 5, when the deceleration of the vehicle speed V is small, the power source that can secure the equipment activation time t1 from the equipment operation vehicle speed Vd based on the equipment operation vehicle speed Vd set in advance and the calculated deceleration. A return vehicle speed Vr3 is calculated. When the vehicle speed V reaches the power return vehicle speed Vr3, supply of power to the equipment 1a and 1b is started. The power recovery vehicle speed Vr3 is lower than the power recovery vehicle speed Vr1 shown in FIG.

In the above-described automobile power supply control device, the following effects can be obtained.
(1) The power supply return vehicle speed Vr can be adjusted according to the deceleration, and the supply of power to the equipment 1a and 1b can be started at the power supply return vehicle speed Vr that can secure the equipment activation time t1 with respect to the equipment operation vehicle speed Vd. . Therefore, regardless of the deceleration, the equipment 1a and 1b can be shifted to the normal operation at the equipment operation vehicle speed Vd.
(2) Since the power recovery vehicle speed Vr can be adjusted according to the deceleration, it is not necessary to set the power recovery vehicle speed Vr unnecessarily high. Therefore, the power saving effect can be improved.
(Second embodiment)
FIG. 6 shows a second embodiment. In this embodiment, only the operation of the control unit 4 is changed with respect to the first embodiment, and other configurations are the same as those of the first embodiment.

  In the first embodiment, the power recovery vehicle speed Vr is calculated based on the deceleration. In this embodiment, the predicted time when the vehicle speed V becomes the equipment operation vehicle speed Vd is calculated based on the deceleration (step 13). Based on the predicted time, a time at which the equipment activation time t1 can be secured is calculated as the power return time (step 14).

When the power recovery time is reached, power is turned on to the equipment 1a and 1b (steps 15 and 16). The operations of steps 11 and 12 are the same as in the first embodiment.
In the automobile power supply control device of this embodiment, the following effects can be obtained.
(1) The power supply return time can be adjusted according to the deceleration, and the supply of power to the equipment 1a and 1b can be started at the power supply return time that can secure the equipment activation time t1 for the equipment operation vehicle speed Vd. Therefore, regardless of the deceleration, the equipment 1a and 1b can be shifted to the normal operation at the equipment operation vehicle speed Vd.
(2) Since the power recovery time can be adjusted according to the deceleration, it is not necessary to set the power recovery time unnecessarily early. Therefore, the power saving effect can be improved.
(Third embodiment)
FIG. 7 shows a third embodiment. In the first and second embodiments, power is supplied to the equipments 1a and 1b via a plurality of relays 3a and 3b controlled to be opened and closed by the control unit 4, but this embodiment outputs the power from the control unit 4. The power is supplied to the plurality of equipments 1a and 1b through one relay 6 that is controlled to be opened and closed by a relay control signal.

With such a configuration, the power supply opening / closing control can be performed on the plurality of equipments 1a, 1b by the common relay 6 controlled to be opened / closed by the control unit 4. The operation of the control unit 4 is the same as that in the first embodiment or the second embodiment.
(Fourth embodiment)
FIG. 8 shows a fourth embodiment. In the first to third embodiments, power is supplied to the plurality of equipments 1a and 1b via relays that are controlled to be opened and closed by the control unit 4, but in this embodiment, communication is performed from the control unit 4 via the communication line 7. A signal is output to the equipment 1a, 1b.

  Based on the communication signal, it is controlled whether or not power is supplied to the microcomputer mounted on each of the equipments 1a and 1b. Each equipment 1a, 1b is provided with a communication signal receiver and an opening / closing device that selects power supply and cutoff based on reception of the communication signal.

With such a configuration, the control unit 4 can control the supply and shutoff of power to the plurality of equipments 1a and 1b. The operation of the control unit 4 is the same as that in the first embodiment or the second embodiment.
(Fifth embodiment)
FIG. 9 shows a fifth embodiment. This embodiment is a combination of the third embodiment and the fourth embodiment.

  That is, the equipment 1 a is controlled to open and close by the relay 6 that is controlled to open and close based on a relay control signal output from the control unit 4, and the equipment 1 b is a communication that is input from the control unit 4 via the communication line 7. Whether to supply power is controlled based on the signal.

With such a configuration, the control unit 4 can control the supply and shutoff of power to the plurality of equipments 1a and 1b.
In addition, you may change the said embodiment as follows.
-In 1st and 2nd embodiment, a control part detects deceleration or acceleration of a vehicle speed in step 2 or step 12, and when a vehicle speed becomes faster than a power supply return vehicle speed, it supplies electric power to a predetermined equipment. It is also possible to configure an automobile power supply control device with an added function.
In step 2 of the first embodiment and step 12 of the second embodiment, instead of calculating deceleration or acceleration, acceleration or deceleration based on a change in vehicle speed is read from a prestored table. May be.

  DESCRIPTION OF SYMBOLS 1a, 1b ... Equipment, 2 ... Battery, 3a, 3b, 6 ... Electric power switching part (switching device, relay), 4 ... Change degree acquisition part (Power supply return timing calculation part, electric power switching part, control part), 7 ... Communication Line, V ... Vehicle speed.

Claims (9)

In a vehicle power supply control device that cuts off the power supply from the battery to the preset equipment within a preset vehicle speed range and resumes the power supply to the equipment when the vehicle speed becomes the power return vehicle speed,
A degree of change acquisition unit for acquiring the degree of change in vehicle speed;
Based on the degree of change, a power recovery timing calculation unit that calculates a power recovery timing for normal operation of the equipment at a constant equipment operation vehicle speed;
A power supply control device for an automobile, comprising: a power switching unit that resumes power supply to the equipment at the power recovery timing. The automobile power supply control device according to claim 1,
The degree-of-change acquisition unit calculates a deceleration of the vehicle speed based on the change in the vehicle speed, and the power supply return timing calculation unit calculates an equipment activation time prior to reaching the equipment operation vehicle speed based on the deceleration. A power supply control device for an automobile, wherein a power return vehicle speed that can be secured is calculated, and the power switching unit resumes power supply to the equipment at the power return vehicle speed. The automobile power supply control device according to claim 1,
The degree-of-change acquisition unit calculates a deceleration of the vehicle speed based on the change in the vehicle speed, and the power supply return timing calculation unit can secure an equipment activation time prior to an equipment operation time based on the deceleration. A power supply control device for an automobile, wherein a power recovery time is calculated, and the power switching unit resumes power supply to the equipment at the power recovery time. The automobile power supply control device according to claim 1,
The degree-of-change acquisition unit calculates the acceleration of the vehicle speed based on the change in the vehicle speed, and the power recovery timing calculation unit can secure the equipment activation time prior to reaching the equipment operating vehicle speed based on the acceleration. A power supply control device for a vehicle, wherein the power switching unit restarts the power supply to the equipment at the power recovery vehicle speed. The automobile power supply control device according to claim 1,
The degree-of-change acquisition unit calculates an acceleration of the vehicle speed based on the change in the vehicle speed, and the power supply return timing calculation unit can secure the equipment activation time prior to the equipment operation time based on the acceleration. A power control device for an automobile, wherein time is calculated, and the power switching unit resumes power supply to the equipment at the power recovery time. The automobile power supply control device according to any one of claims 1 to 5,
The power supply control device for an automobile, wherein the power switching unit includes relays that respectively open and close power supplied to a plurality of equipment based on a relay control signal output from the control unit. The automobile power supply control device according to any one of claims 1 to 5,
The power switching unit is
A control unit that outputs a communication signal to a plurality of equipment via a communication line;
An automobile power supply control device comprising: an opening / closing device for opening / closing electric power supplied to each of the equipments based on the communication signal. The automobile power supply control device according to any one of claims 1 to 5,
The power switching unit is
A relay that opens and closes the power supplied to one of the equipment,
A control unit that outputs a communication signal to the other equipment via a communication line;
An automotive power supply control device comprising: an open / close device that opens and closes electric power supplied to the other equipment based on the communication signal. In a vehicle power supply control method for shutting off power supply from a battery to a preset equipment within a preset vehicle speed range and restarting the power supply to the equipment when the vehicle speed becomes a power return vehicle speed,
Obtaining a degree of change in vehicle speed, calculating a power supply return timing for causing the equipment to normally operate at a constant equipment operation vehicle speed based on the degree of change, and restarting power supply to the equipment at the power supply return timing A power control method for an automobile characterized by the above.