JPH01248794A - Operating control system for concentrated wiring system - Google Patents

Abstract

PURPOSE:To decrease a dark current even at parking by operating only a required minimum part if the operation of a concentrated wiring system such as at parking is undesired and stopping other parts. CONSTITUTION:Only one of plural terminal stations 10-14 connecting to a power control switch is selected and operated by a command by a central station 1 at parking. Thus, one of the central station or one of plural terminal stations 10-14 and one of the central station are operated at parking. While the terminal stations 10-14 are operated, the center station 1 monitors the power control switch. If some one unlocks a door to open and enters a car, the turning-on of the door switch is sensed by the central station 1 to bring all the terminal stations 10-14 into the operating state thereby starting the normal operation of the concentrated wiring system. Thus, the dark current at parking is reduced.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an integrated wiring system using multiplex communication in a car, and particularly to an operation control method for reducing dark current during parking.

[Conventional technology] The number of lamps, switches, and electronic devices installed in automobiles is increasing, and the wire harnesses, which are bundles of wires that interconnect these devices, are also becoming larger and more complex. It is becoming. For this reason, problems such as difficulty in securing wiring space, low productivity, and low reliability are emerging.

As one method for solving these problems, an integrated wiring system has been proposed that applies multiplex communication technology to transmit a large number of signals with a small number of wiring lines.

As such a wiring system, for example,
7-171852, etc.

By the way, cars have things like parking lights, etc.
There are electrical components that must be operated even when the vehicle is parked. One way to do this is to keep the central wiring system running all the time and constantly monitor the status of the switches, but if you leave it parked for a long time, the battery will discharge. . Therefore, in order to put an integrated wiring system into practical use, it is essential to have a system that operates only the necessary parts when necessary. Japanese Patent Publication No. 56-1
In No. 53853, power supply is controlled by turning an ignition switch on and off.

[Problem to be solved by the invention]

However, in the above-mentioned conventional technology, power is directly controlled only by the ignition switch, and parking lamp switches and the like use OR gate circuits and are wired separately from the multiplex transmission system.

There has been a problem in that the benefits of introducing an integrated wiring system for the purpose of reducing the number of wiring lines and achieving miniaturization are not sufficiently realized.

Based on the above background, it is an object of the present invention to solve the problems and to
An object of the present invention is to provide a method for controlling the operation of a centralized wiring system.

[Means to solve the problem]

In order to achieve the above object, in the present invention, the central station is always in operation, and the operation of the terminal stations is controlled by the central station depending on the state of the switch.

Even when the centralized wiring system does not need to be operating, such as when parking, all switches whose status must be monitored (hereinafter referred to as power control switches) are turned off.
The central station sequentially activates only the terminal stations connected to the power control switch, transmits signals, and monitors the power control switch.

[Effect]

While the vehicle is parked, only one of the plurality of terminal stations connected to the power control switch is selected and put into operation according to a command from the central station. Therefore, only one central station or one central station and one of a plurality of terminal stations is operating while the vehicle is parked.

The central station monitors the power control switch while operating the terminal stations. For example, unlock the door,
When you open the door and get into the car, the central station detects that the door switch is turned on, puts all terminal stations into operation, and the centralized wiring system begins normal operation.

〔Example〕

Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a configuration diagram of an integrated wiring system showing an embodiment of the present invention. The central station 1 is connected to the terminal stations 10 to 14 by a multiplexed signal 11A2, and loads such as lamps in the electric devices 101 to 143 connected to the terminal stations 10 to 14 by signals transmitted from the central station 1. The states of switches and the like are received by the terminal stations 10 to 14 and taken into the central station 1. Power to the terminal stations 10-14 is supplied through power lines 3-5 under the control of the central station 1. The terminal station 10 is connected to the terminal station 1 by the power line 3.
1 is supplied with power through a power line 4, and terminal stations 12 to 14 are supplied with power through a power line 5. In normal operating conditions (normal mode), such as when the engine is running,
All terminal stations are operating. The state of the door switch 101 is read into the central station 1 through signal transmission with the terminal station 10. The central station 1 processes the read data of the door switch 101, creates data for controlling the room lamp 141, transmits it to the terminal station 14, and controls the room lamp 141.

A door switch 101, an ignition switch 111, and a parking lamp switch 112 are connected to the terminal station 10.11 as power control switches.

FIG. 2 is a flowchart showing an embodiment of control according to the present invention. The operation control method will be explained using FIGS. 1 and 2.6 During normal driving, etc., the process 5011 judgment
2 is repeatedly executed. When the central g11 detects that all the power control switches are off, judgment 502 is executed.
A branch to decision 503 occurs. Here, the reference numeral 503 allows the device to operate in the normal mode for, for example, several tens of seconds even if all of the power control switches are turned off.

When moving from judgment 503 to processing 504, first all terminal stations 10
-Turn off the power of 14. Next, the power supply control switches are monitored, and when any of the power supply control switches is turned on, the operation accompanying the processing for returning to the normal mode will be referred to as a stop mode. In step 505, one terminal station is selected from among the plurality of terminal stations connected to the power control switch, and power is supplied to it. Processing 5
Signal transmission is performed with the terminal station set in the operating state in step 06, and the power control switch connected to the terminal station is monitored.In step 507, the power is cut off and the operation of the terminal station is stopped. While all the power control switches are off, processes 505 to 507 are repeatedly executed while changing the terminal station to be operated. Judging the state of the power control switch is 5
This is being done in 08. If the power control switch is off, the process branches to judgment 509, and if it is on, the process branches to process 511. In process 511, power is supplied to all the terminal stations to return them to the 1 normal mode, and the process 509 returns to process 501. Process 510 determines the repetition interval of processes 505 to 508. In this embodiment, whether or not to execute process 519 is determined based on the stop mode and the duration of the door lock state. Branching to process 510 occurs when parking for a long time, such as parking from night to morning, and there is no need to monitor the switches frequently. You only need to monitor it once.

Further, the selection of the terminal station performed in process 505 can also be changed depending on the state of the switch.

For example, if the door is locked in stop mode and the driver is not in the vehicle, only the door switch needs to be monitored. If this is combined with process 510, for example, if there are two terminal stations connected to a door switch and monitoring is performed once per second, monitoring will be performed twice per second. , the time during which power is supplied can be 100 milliseconds or less. That is, in the centralized wiring system, only the central station operates even when the vehicle is parked, and the terminal stations operate one by one at intervals.

〔Effect of the invention〕

According to the present invention, when the centralized wiring system does not need to be operating, such as when parking, it is possible to operate only the minimum necessary parts and stop the other parts. This has the effect of reducing dark current.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an integrated wiring system according to an embodiment of the present invention, and FIG. 2 is a flowchart showing an embodiment of the operation of FIG. 1. DESCRIPTION OF SYMBOLS 1...Central station, 2...Signal line, 3-5...Power line, 10-14...Terminal station, 101-143...Electrical equipment. Figure 1 Figure 20

Claims (1)

[Claims] 1. An automobile has one central station that controls multiplex communication and performs data processing, and a plurality of terminal stations connected to switches and loads in the automobile, and the central station and In an integrated wiring system that connects multiple terminal stations with signal lines, performs time-division multiplex communication, monitors the switches, and controls the loads, all power control switches such as parking lamp switches are turned off. In this case, after stopping the power supply to the plurality of terminal stations, the terminal stations connected to the power control switch among the plurality of terminal stations are operated and monitored one by one, and the power supply control is performed. An operation control method for an aggregated wiring system, characterized in that all terminal stations are operated when it is detected that at least one of the switches is on. 2. An integrated wiring system according to claim 1, characterized in that the intervals at which the terminal stations are operated are changed depending on the duration of the off state of the power control switch and the states of switches other than the power control switch. operation control method. 3. An operation control method for an integrated wiring system according to claim 1 or 2, characterized in that the total number of terminal stations to be operated one by one is changed depending on the state of a switch in the vehicle.