JPH11115649A - Loading on/off control system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate problems concerning safety preservation by making the capacity of a protector small even if current loading accompanied with rush current is controlled, and make each wire small in size for reducing the cost of the whole system. SOLUTION: Plural switches provided for one out of respective door nodes 7, for example, either of an up-switch and a clown-switch is operated, and when the content of the operation is fed to a master node 5 by way of a multiplex communication line 8, in order to operate the respective motors for the respective door nodes 7 while being shifted in timing by the master node 5, let control data for the respective door nodes be generated so as to be fed to respective door nodes 8 by way of a multiplex communication line 8, so that the window of each door 6 corresponding to each door node 7 is thereby driven upward or downward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load on / off control system for a vehicle for controlling on / off of an electric load such as a power window and a lamp provided in a vehicle.
In particular, the present invention relates to a vehicle load on / off control system that forcibly shifts the timing of turning on / off each motor and the like to reduce the maximum value of the load current.

[0002]

2. Description of the Related Art A vehicle load on / off control system for controlling on / off of an electric load such as a power window provided in a vehicle corresponds to an electric load 102 such as a motor or a lamp as shown in FIG. When each switch 103 is closed, the power supply voltage obtained by the battery 104 is applied to the electric load 102 corresponding to the closed switch 103 via a fuse 105 → the closed switch 103 → the electric load 102. To turn it on.

[0003]

In the vehicle load on / off control system 101, when determining the capacity of the fuse 105 constituting the system and the size of each electric wire, as shown in FIG. When a current larger than the load current region flows, the capacity of the fuse 105 is determined so that the fuse 105 is blown.
The size of the electric wire is determined so that the electric wire does not burn out even if a current larger than the load current required for fusing the electric wire flows.

However, according to such a determination method, an electric load having a large inrush current characteristic, such as a motor or a lamp, for example, a large inrush current as shown in FIG. Charge load 1
When two or more 02 exist, when the respective electric loads 102 are simultaneously turned on, a large drive current flows as shown in FIG. 16, and accordingly, the capacity of the fuse 105 is increased. And the size of each wire must be increased.

For this reason, even if each of the electric loads 102 is short-circuited or the like, the fuse 105 is hardly blown by an amount corresponding to the increase in the capacity of the fuse 105. And the cost of the entire system rises.

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention can reduce the capacity of a protector even when controlling an electric load involving an inrush current, thereby eliminating the problem of security. An object of the present invention is to provide a vehicle load on / off control system capable of reducing the size of each electric wire and keeping the cost of the entire system low.

According to the present invention, each electric load can be controlled at an optimal timing according to the inrush current characteristic of each electric load. It is an object of the present invention to provide a vehicle load on / off control system that can eliminate the problem and reduce the size of each electric wire, thereby reducing the cost of the entire system.

[0008]

In order to achieve the above object, according to the present invention, there is provided a vehicle for controlling on / off of each electric load provided on the vehicle based on input operation contents. In the load on / off control system, when each of the electric loads is turned on based on the input operation content, a control unit that shifts the on timing of each of the electric loads according to an inrush current characteristic of each of the electric loads. It is characterized by having.

According to a second aspect of the present invention, in the load on / off control system for a vehicle according to the first aspect, when the control unit shifts the timing of turning on each of the electric loads, the control unit turns on the electric load first. If the inrush current period of the electric load is long, increase the time until the next electric load is turned on.If the inrush current period of the electric load that has been turned on earlier is short, connect the next electric load. It is characterized in that the time until turning on is shortened.

According to the above configuration, when each electric load is turned on based on the input operation content, the on timing of each electric load is shifted in accordance with the inrush current characteristic of each electric load. Thus, even when controlling an electric load involving an inrush current, the capacity of the protector is reduced to eliminate security problems, and the size of each electric wire is reduced, thereby reducing the cost of the entire system.

According to a second aspect of the present invention, when the timing of turning on each of the electric loads is shifted, if the inrush current period of the electric load that has been turned on first is long, the time until the next electric load is turned on is changed. If the inrush current period of the electric load that was previously turned on is short, the time until the next electric load is turned on is shortened to meet the inrush current characteristics of each electric load. In addition, each electric load is controlled at an optimal timing, thereby reducing the capacity of the protector, eliminating security problems, and reducing the size of each electric wire to reduce the cost of the entire system.

[0012]

FIG. 1 is a block diagram showing an embodiment of a vehicle load on / off control system according to the present invention.

The vehicle load on / off control system 1 shown in FIG. 1 includes a power supply line 4 for supplying a power supply voltage output from a battery 3 provided in a vehicle 2 to each part of the system.
A master node 5 for centrally controlling the operation of each part of the system in a master / slave manner based on a power supply voltage supplied via the power supply line 4, and a power supply voltage supplied via the power supply line 4 as a power supply 5, and based on the result of the communication, four windows (front right (F · R) for driving the windows of the doors 6 provided in the vehicle 2 in the vertical direction,
Front left (FL), rear right (RR), and rear left (R
L)), and a plurality of multiplex communication lines 8 that support communication between each door node 7 and the master node 5. One of the plurality of switches provided in one of the door nodes 7 is provided. Is operated, and when the operation content is supplied to the master node 5 through the multiplex communication line 8, the master node 5 generates control data for each door node 7 in order to shift the operation timing of each door node 7, and This is supplied to each door node 7 through the multiplex communication line 8, and the window of each door 6 corresponding to each door node 7 is driven up or down.

As shown in FIG. 2, each of the door nodes 7 includes an up switch 9 operated to raise the window of the door 6 and a down switch 10 operated to lower the window of the door 6. A power supply circuit 11 that takes in a power supply voltage (power supply voltage output from the battery 3) supplied via the power supply line 4 and generates a stabilized power supply voltage having a preset stable voltage value; It operates based on the stabilized power supply voltage output from the power supply circuit 11, and transmits and receives data to and from the master node 5 when a communication right is given from the master node 5 via the multiplex communication line 8. It operates on the basis of the communication circuit 12 and the stabilized power supply voltage output from the power supply circuit 11, and obtains the operation contents of the up switch 9 and the down switch 10. Crowded in, and supplies the operation data indicating each operation content to the communication circuit 12, causes transmitted to the master node 5, control data outputted from the communication circuit 12 (control data transmitted from the master node 5)
And an input / output circuit 13 that outputs an up instruction signal and a down instruction signal.

Further, each door node 7 has a coil 14 and a relay contact 15, and when an up instruction signal is output from the input / output circuit 13 to energize the coil 14, the relay contact 15 is operated. A power supply voltage (power supply voltage output from the battery 3) is supplied to a motor 16 provided on the door 6, and an up drive circuit 17 for driving the motor 16 to rotate in an up direction is provided. A coil 18 and a relay contact 19 are provided.
When a down instruction signal is output from the input / output circuit 13 and the coil 18 is energized, the relay contact 19 is operated to supply the power supply voltage (the power supply voltage output from the battery 3) to the motor 16. And a down drive circuit 20 for rotating the drive in the down direction.

Each door node 7 has a battery 3
When the communication right is given from the master node 5 via the multiplex communication line 8 while generating a stabilized power supply voltage based on the power supply voltage output from the Then, the operation contents of the down switch 10 are fetched, operation data indicating each operation contents is supplied to the communication circuit 12, and the data is converted from parallel / serial as shown in FIG. In this state, when the control data is transmitted from the master node 5 and the serial / parallel-converted control data is output from the communication circuit 12 as shown in FIG. It is determined whether the control data is an up instruction or a down instruction. If the control data indicates an up instruction, the up driving circuit 17 is operated to rotate the motor 16 in the up direction, and the control is performed. If the data indicates a down instruction, the down drive circuit 20 is operated to rotate the motor 16 in the down direction.

The door node 7 on the driver's seat side among the door nodes 7 has a plurality of switches (not shown) that can raise and lower windows provided on the other doors 6. Also, when each switch is operated and an ascending or descending instruction of a window provided in another door 6 is input, the master node 5 controls the ascending or descending of the window of the designated door 6. It is controlled to descend.

As shown in FIG. 5, the master node 5 takes in the power supply voltage (the power supply voltage output from the battery 3) supplied through the power supply line 4, and sets a predetermined stable voltage. A power supply circuit 21 for generating a stabilized power supply voltage having a value; operating based on the stabilized power supply voltage output from the power supply circuit 21; Circuit 22 for sending and receiving data, and ROM storing programs and the like
23, R used as a temporary storage area for data
It has an AM 24, operates based on the stabilized power supply voltage output from the power supply circuit 21, takes in the operation data of each door node 7 output from the communication circuit 22, processes the data, and processes the data based on the processing result. And a CPU circuit 25 for generating control data and transmitting the control data to each door node 7 from the communication circuit 22. The CPU circuit 25 generates a stabilized power supply voltage based on the power supply voltage output from the battery 3, 22, each door node 7 is cyclically designated, operation data is collected from each door node 7, and the CPU circuit 25 decodes the contents of the operation data.
By operating a timer (a timer created in a program) provided in the computer 4, control data for opening and closing the window of each door 6 is generated at an optimal timing, and the control data is supplied to the communication circuit 22. It transmits to the door node 7.

Next, the operation of this embodiment will be described with reference to the flowchart shown in FIG.

First, when a power switch (not shown) of the vehicle load on / off control system 1 is turned on, each door node 7 is sequentially and cyclically selected by the communication circuit 22 of the master node 5. Then, the operation data transmitted from each door node 7 is fetched (step ST1), and the contents of each operation data and the input data map 26 created in the RAM 24 as shown in FIG. The contents are compared with each other (step ST2), and it is checked whether these contents match. If these contents match,
It is determined that no new operation instruction has been given to the window of each door 6, and the window control process is skipped (step ST3).

When the content of each operation data is compared with the content of the input data map 26, if there is a part (bit) that does not match (step ST3), the bit of each bit included in the new operation data is determined. Among them, it is checked whether or not the mismatched bit is for driving the window opening / closing. If the new operation content is not for driving the window opening / closing (step ST4), the CPU circuit 25 executes the operation shown in FIG. Thus, the contents of the on-waiting order table 28 created in the RAM 24 are all reset to "0" (step ST8). afterwards,
The CPU circuit 25 checks whether there is an instruction to stop the opening and closing of the window during the new operation content, and if there is such an operation instruction, based on this operation instruction, as shown in FIG. After the contents of the output data map 29 created in the RAM 24 are changed (step ST12), control data is generated based on the contents of the output data map 29 and transmitted from the communication circuit 22 to each door node 7. Thus, the operation state of the motor 16 corresponding to each door node 7 is changed (step ST1).
3).

If the new operation content includes an instruction to open and close the window (step ST4), C
The PU circuit 25 checks whether or not the timer of the door node 7 designated as the rank "1" has expired in the on-waiting rank table 28. If the timer has expired (step ST5), the on-waiting is performed. The contents of the output data map 29 are changed based on the number of the door node 7 having the rank “1” among the ranks in the rank table 28 (step ST9).
Each rank in the on-waiting rank table 28 is reduced by one, and the priority is raised one by one (step ST10).
The timer corresponding to the door node 7 whose rank is "1" is set and a new time measurement is started (step ST1).
1).

Thereafter, it is checked whether or not the new operation content includes an instruction to stop the opening and closing of the window. If there is such an operation instruction, the output data map 2
9 is changed (step ST12), control data is generated based on the contents of the output data map 29, and is transmitted from the communication circuit 22 to each door node 7, and the motor 16 corresponding to each door node 7 is controlled. Is changed (step ST13).

If the timer of the door node 7 designated as rank "1" in the on-waiting rank table 28 has not timed out (step ST5), the CPU circuit 25 sets the door node 7 to the off state by a new operation. It is checked whether or not the contents requested to be turned on from the ON state match the contents of the ON wait order table 28. If the contents do not match, the ON wait state table 28 sets the ON request state. However, if there is a door node 7 for which the ON request has been canceled in the current operation content (step ST6), the order of the door node requested to be canceled among the orders in the ON waiting order table 28 is “0”. (Step ST7). Further, the contents requested to be changed from the OFF state to the ON state by the new operation contents do not match the contents of the ON wait order table 28, and the ON wait order table 28 does not set the ON request state. However, if there is a door node 7 for which an ON request has been made in the current operation content (step ST
6) The door node 7 newly requested to be turned on is registered in the on-waiting order table 28 in a lower order than the lowest one among the orders of the door nodes 7 in the on-waiting order table 28 (see FIG. 4). Step ST7).

When it is checked whether or not the contents requested to be changed from the off state to the on state by the new operation contents match the contents of the on-waiting order table 28, the contents match. (Step S
T6) The CPU circuit 25 skips the above-described process of changing the on-waiting order table 28.

Thereafter, it is checked whether or not there is an instruction to stop the opening and closing of the window in the new operation content. If there is such an operation instruction, the output data map 2 is checked.
9 is changed (step ST12), control data is generated based on the contents of the output data map 29, and is transmitted from the communication circuit 22 to each door node 7, and the motor 16 corresponding to each door node 7 is controlled. Is changed (step ST13).

As described above, in this embodiment, a plurality of switches provided in one of the door nodes 7, for example, one of the up switch 9 and the down switch 10 is operated, and the multiplex communication line 8 is used. When the operation content is supplied to the master node 5, control data for each door node 7 is generated at a timing such that each motor 16 of each door node 7 is shifted and operated by the master node 5, and this is transmitted to the multiplex communication line. 8, the door 16 is supplied to each door node 8, and the window of each door 6 corresponding to each door node 7 is driven upward or downward. Therefore, the motor 16 of each door 6 is moved upward from each door node 7. Even if the operation data for rotating in the downward direction or the operation data for rotating in the downward direction is output simultaneously, the motor 16 It can be shifted to the ON state, and as shown in FIG. 10, the peak values of the current flowing through the power supply line 4 can be suppressed low so that the peaks of the rush current flowing through each motor 16 do not overlap. it can.

As a result, even when controlling an electric load involving an inrush current, the capacity of the protector can be reduced to eliminate the problem of security, and the size of each electric wire can be reduced so that the entire system can be controlled. Costs can be kept low.

Further, in the above-described embodiment, the vehicle load on / off control system 1 according to the present invention will be described on the assumption that the inrush current characteristics of the motor 16 for raising or lowering the door window are the same. However, when the inrush current characteristics of each motor 16 are different, or when each motor 16 and the electric loads other than the motor 16 are comprehensively controlled, a time-up period corresponding to the inrush current characteristics of each electric load, for example, As shown in FIG. 11, when an electric load having a long inrush current period is turned on, a time-up period until the next electric load is turned on is lengthened, and as shown in FIG. When the electric load having the short period is turned on, the time-up period until the next electric load is turned on may be shortened.

By doing so, the overlap of the rush currents can be further reduced, and the peak value of the current flowing through the power supply line 4 can be reduced.

[0031]

As described above, according to the present invention, in the vehicle load on / off control system according to the first aspect, the capacity of the protector can be reduced even when controlling an electric load involving an inrush current. Thus, security problems can be eliminated, and the size of each electric wire can be reduced, so that the cost of the entire system can be kept low.

Further, in the vehicle load on / off control system according to the second aspect of the present invention, the load on / off control system according to the inrush current characteristic of each electric load is
Each electrical load can be controlled at the optimal timing, thereby reducing the capacity of the protector and eliminating security problems, and reducing the size of each wire to reduce the overall system cost. Can be kept low.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a vehicle load on / off control system according to the present invention.

FIG. 2 is a block diagram showing a detailed circuit configuration example of a door node shown in FIG. 1;

FIG. 3 is a schematic diagram showing an operation data transmission operation example of the door node shown in FIG. 1;

FIG. 4 is a schematic diagram showing an example of a control data receiving operation of the door node shown in FIG. 1;

FIG. 5 is a block diagram showing a detailed circuit configuration example of a master node shown in FIG. 1;

FIG. 6 is a flowchart illustrating an operation example of the vehicle load on / off control system illustrated in FIG. 1;

FIG. 7 is a schematic diagram showing an example of an input data map used when creating control data from operation data by the CPU circuit shown in FIG. 5;

8 is a schematic diagram showing an example of an on-waiting order table used when creating control data from operation data by the CPU circuit shown in FIG. 5;

9 is a schematic diagram showing an example of an output data map used when creating control data from operation data by the CPU circuit shown in FIG. 5;

FIG. 10 is a waveform chart showing an example of a current flowing through the power supply line shown in FIG.

FIG. 11 is a waveform diagram showing another embodiment of the vehicle load on / off control system according to the present invention.

FIG. 12 is a waveform diagram showing another embodiment of the vehicle load on / off control system according to the present invention.

FIG. 13 is a block diagram showing an example of a conventionally known load on / off control system for a vehicle.

FIG. 14 is a characteristic diagram used when determining the fuse capacity and the wire size of the vehicle load on / off control system shown in FIG.

15 is a waveform diagram showing an example of a current flowing through each electric load of the vehicle load on / off control system shown in FIG.

16 is a waveform diagram showing an example of a current output from a battery of the vehicle load on / off control system shown in FIG.

[Description of Signs] 1 Load on / off control system for vehicle 2 Vehicle 3 Battery 4 Power line 5 Master node 6 Door 7 Door 8 Multiple communication line 9 Up switch 10 Down switch 11, 21 Power supply circuit 12, 22 Communication circuit DESCRIPTION OF SYMBOLS 13 I / O circuit 14, 18 Coil 15, 19 Relay contact 16 Motor 17 Up drive circuit 20 Down drive circuit 23 ROM 24 RAM 25 CPU circuit 26 Input data map 27 ON waiting order table

Claims (2)

[Claims] 1. A load on / off control system for a vehicle, which controls on / off of each electric load provided in a vehicle on the basis of input operation contents, wherein each electric load is controlled based on the input operation contents. A load on / off control system for a vehicle, comprising: control means for shifting on timing of each electric load according to an inrush current characteristic of each electric load when the electric load is turned on. 2. The in-vehicle load on / off control system according to claim 1, wherein the control unit shifts a timing at which each electric load is turned on, and detects a rush current of the electric load that is turned on first. If the period is long, the time until the next electric load is turned on is long, and if the inrush current period of the electric load that was turned on earlier is short, the time until the next electric load is turned on Load on / off control system for a vehicle, characterized in that: