JPS61229639A - Control system for car - Google Patents

Abstract

PURPOSE:To improve remove the reliability of a system sharingly controlling car accessories via value multiple control stations by activating the power-on rest to return a station to a normal operation when one of control stations runs away. CONSTITUTION:In a control system consisting of control stations: a master station 10, an intra-panel remote station 20, front and rear remote stations 30, 40, when the abnormality detection is operated, activation signals are sent to all remote stations 20-40 from the master station 10. Next predetermined signals requesting predetermined responses are set to stations 20-40, and if no normal response is returned to the master station 10 after a fixed time has elapsed, the system judges as an abnormality occurrence. At an abnormality occurrence, the relay R2 of a power line L2 for remote stations is turned off for a short time, and the power-on-reset function is operated.

Description

[Detailed description of the invention] "Industrial application field" This invention includes lamps, indicators, and horns.

Regarding automobile control systems that share control of automobile accessories such as wiper motors among multiple control stations,
This particularly concerns countermeasures against such abnormalities.

``Conventional technology At the front of the car are headlights and an antenna.

There is a horn, fog lamp, turn lamp, etc., and the driver's seat has a wiper motor, washer motor, blower motor, various indicators, various operation switches, etc., and the rear part has a tail lamp, license lamp, stop lamp, 5 turn lamp, and back lamp. etc. If such equipment were to be centrally controlled at one location, a large number of wires would have to be laid from the front to the rear of the vehicle, which would be a heavy burden.

For example, as disclosed in Utility Model Application No. 48-109629, a control station is provided in each section so that the equipment of each section is directly controlled separately at those control stations, and the equipment of each section is controlled separately. It is proposed to install only the minimum number of wires necessary for controlling the control in the vehicle.

``Problem to be solved by the invention'' If any abnormality occurs in the control station, the control station will be subject to incorrect control, which may impede the safe operation of the vehicle. Therefore, when an abnormality occurs in the control station, it is necessary to promptly detect it and take countermeasures.

An object of the present invention is to provide an automobile control system that can suitably deal with such abnormalities.

"Structure of the Invention" In the vehicle control system of the present invention, a large number of vehicle equipment is divided into two or more groups, and the equipment belonging to each group is connected to each control station provided correspondingly to each group. and each control station should be able to cooperate with each other. A switch means is connected to the power line of the other control station, and the switch means is connected to the power supply line of the other control station.
The configuration is characterized in that the predetermined control station temporarily turns off when an abnormality in the other control station is detected.

"Operation" A given control station can quickly detect abnormalities in other control stations through response patterns in communications with other control stations. Therefore, once the power to the other control stations is turned off using the switch means, the other control stations are reset to power on, so if an abnormality occurs in that control station due to a runaway of the microcomputer, for example, The scales will return to normal operation.

"Example" The present invention will be further described in detail below based on the example shown in the drawings. FIG. 1 is an explanatory diagram of the configuration of an automobile control system according to an embodiment of the present invention, FIG. 2 is a flowchart of abnormality detection processing in the master station, and FIG. 3 is a flowchart of abnormality processing. Note that the present invention is not limited thereby.

As shown in FIG. 1, a control system 100 includes a master station 10. Instrument panel remote station 2
0. It consists of each control station, front remote station 30 and rear remote station 40, and each remote station 20, 30, 40
are satellite-like connected to the master station 10 via transmission lines 29, 39, and 49, respectively.

The master station 1° is installed under the passenger seat, the instrument panel remote station 20 is installed behind the instrument panel, the front remote station 30 is installed inside the engine compartment, and the rear remote station 40 is installed inside the trunk compartment. has been done.

These control stations 10-40 are powered by a battery 50.
A power line L1 for the master station 10 and a power line L2 for the remote stations 20 to 40 are provided separately.

A relay contact R1 is interposed in the power line LI to the master station 10, while the remote station 2
A relay R7 is interposed in the power line L2 of 0 to 40.

Furthermore, a key switch KI+ and door switches D1 to D4 are connected in parallel to a relay R1 provided on the power line LI.

When the car is parked and no functions are working,
Since the car door is closed, the door switch D,
~D, is turned off. Also, since the key is not inserted, the ←-switch is also off. Also, normally relays R, , R2 are off.

Therefore, from battery 50, the master switch]
0 and the remotes 20 to 40 are maintained in a state in which no power is supplied.

When the driver opens the door to get into the car,
Either door switch D or -D is turned on, and therefore master station 10 is connected to battery 50. Then, the master station 10 first performs its own power-on reset and then starts predetermined operations, and as one of the processes, relay R3 and relay R
Turn on 3. Since relay R1 is turned on, master station 10 self-maintains battery 5.
It will be connected to 0. On the other hand, since relay R7 is turned on, remote stations 20 to 40 are also connected to battery 50, and after performing a power-on reset, start predetermined operations.

Therefore, the control system 100 starts operating as soon as the driver opens the door.

The master station 10 has a key switch K.

and door switches D and -D are all off,
Relay R and relay R after a predetermined time after it is detected.
9 is off. For this reason, for example, after the driver closes the door and leaves, the control system 10
0 will be automatically disconnected from the battery 50.

However, if equipment that needs to continue operating even when the driver is not present, such as parking lights, hazard lights, door lights, room lights, door ajar warning lights, etc., is turned on, the master station 10 will Detecting it, even if the key switch is 1 and the door switch D
Even if 1 to D4 are off and on, relays R and R2 are kept on. As a result, parking lights and the like can continue to be turned on even if the driver removes the key, closes the door, and leaves the vehicle.

On the other hand, even if equipment such as the radio or rear defroster that does not need to continue operating when the driver is not present is on, relays R1 and R2 are turned off and the battery 50 is not consumed indefinitely. It looks like this.

If the key is put in, the key switch turns on, so the control system 100 is always connected to the battery 50.

Now, when the control system 100 is operating, the master station 10 communicates with each of the remote stations 20-40 to ensure coordinated operation among the control stations 10-40. Understand the operating status of the equipment. Since a predetermined pattern of responses in this communication is determined, if a remote station exists that violates this pattern, that remote station can be considered to be in an abnormal state.

Figure 2 shows the operation of abnormality detection. First, all remote stations 2 are detected from the master station 10.
An activation signal is sent to 0-40.

This is for synchronization between master station 10 and remote stations 20-40.

Next, the master station 10 transmits a predetermined signal requesting a predetermined response to the instrument panel/remote station 20, and waits for a normal response.

The normal response here is from the instrument panel/remote station 2.
If a reply is received from 0, it is determined that there is no abnormality in the instrument panel/remote station 20. However, if a normal response is not returned even after a certain period of time has elapsed, it is determined that there is some abnormality in the instrument panel/remote station 20, and the determination result is stored.

Below, the same process will be performed on the front remote station 3.
0 and the rear remote station 40.

Finally, it is checked whether there is an abnormality in any of the remote stations, and if there is no abnormality, normal operation continues.

However, if an abnormality is detected in any of the remote stations, as shown in FIG. 3, the relay R2 of the power line L2 for the remote stations 20-40 is turned off for a short time and then turned on again.

As a result, each remote station 20 to 40 is momentarily powered off and then powered on, so
The power-on reset function of each control station operates and starts the predetermined process again from the beginning. Therefore, if the cause of the abnormality in the remote station where the abnormality occurred was, for example, a runaway of the microcomputer, normal operation will be restored.

The microcomputer of the master station 10 is located inside the vehicle and is relatively protected from external noise, but the remote stations 20 to 40 are located inside the engine room and are under relatively harsh conditions. Master station 10 and remote station 2
It is necessary to monitor the runaway of 0-40.

As understood from the above explanation, this control system 1
According to 00, when there is an abnormality in the remote stations 20 to 40, a power-on reset can be applied to restore the remote stations to normal operation.

Moreover, since this reset is achieved through the power supply line, there is no need to provide a separate reset signal line, simplifying the wiring, and connecting the remote stations together.
This means that 0-40 can be reset.

In another embodiment, the number of power line wiring is increased, but the power line is divided for each remote station, a relay is provided for each, and the relays are individually turned on and off by the master station 10. can be mentioned.

In yet another embodiment, instead of one master station and a plurality of other remote stations as in the above embodiment, there are several control stations and several other control stations. The two groups may each perform a power-on reset on the other party.

Moreover, as yet another embodiment, there is one in which the abnormality detection processing is configured in terms of hardware.

"Effects of the Invention" According to the present invention, a large number of accessories of an automobile are divided into two or more groups, and the accessories belonging to each group are connected to each control station provided correspondingly to each group, and In an automobile control system in which the respective control stations are substantially interconnected by transmission lines so as to be able to cooperate with each other, a predetermined control station and other control stations are connected to separate power lines,
A switch means is interposed in the power supply line of the other control station, and the switch means is temporarily turned off when an abnormality of the other control station is detected by the predetermined control station. An automobile control system is provided which is characterized by the following: When one of the control stations goes out of control, a power-on reset is applied to restore the control station to normal operation, thereby improving the reliability of the control system. You can get the effect of improving your

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of an automobile control system according to an embodiment of the present invention, FIG. 2 is a flowchart of abnormality detection processing in a master station, and FIG. 3 is a flowchart of abnormality processing. (Explanation of symbols) 10... Master station 20... Instrument panel/remote station 30...
Front remote station 40...Rear remote station L I+'L2...Power line R+ + R2...Relay K,...Key switch D,~D4...Door switch 5-0...
Battery 100...control system. Applicant: Daihatsu Motor Co., Ltd. Agent, Patent Attorney: Takeo Honjo, Figure 1, IR5, Side ---] Shin + 1---' [l Juyoron 1υ, Figure 2, Different Op! Go to R5 with arrow processing money and go to jl with 1shi 11ee and go to Kushi IF5 P7r fixed number
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Claims (1)

[Claims] 1. A large number of automobile equipment is divided into two or more groups, and the equipment belonging to each group is connected to each control station provided correspondingly to each group, and each of these control stations cooperates with each other. In a control system for a vehicle that is substantially interconnected by a transmission line, a predetermined control station and other control stations are connected to separate power lines, and the power lines of the other control stations are connected to each other. A control for an automobile, characterized in that a switch means is interposed, and the switch means is temporarily turned off when an abnormality in the other control station is detected by the predetermined control station. system.