JPH0772043A - Vehicle managing system - Google Patents

Abstract

PURPOSE:To make it possible to record the control information data before and after the occurrence of a fault without the load on the RAM of a vehicle-mounted electronic control system. CONSTITUTION:An operation managing device A, wherein the operating data of a vehicle are recorded in a RAM, and various kinds of electronic control devices B, which are mounted on the same vehicle, are mutually connected by a communication network C. In the various kinds of the control devices B, the following means are provided. A data rewriting means 21 alternately stores the newest control information data into two regions of a RAM 20 in a specified period. A data-transmission processing means 22 outputs the control information data stored in two regions of the RAM 20 as the transmission data of the communication network C in time sequence with before-fault-data first when the fault of the control system has occurred. In the operation control device A, the following means are provided, that is, a data reception processing means 32 receives the transmission data of the various kinds of electronic control devices B from the communication network C, and A data recording means 31 adds the identification information and the time of the occurrence of the fault in the control devices B to the received data and stores the data into a RAM 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle management system device.

[0002]

2. Description of the Related Art Recently, an example in which a control unit including a microcomputer is provided for various vehicle controls and the operation of an actuator is electronically controlled based on detection signals from various sensors is often seen. In order to diagnose the failure of such an electronic control system, there is known a diagnostic device which is connected to a control unit via a data communication means (Japanese Patent Application No. 4-1460).

[0003]

By the way, when a failure occurs in the electronic control system, if the failure phenomenon and the traveling situation at that time can be accurately reproduced, it is extremely effective in clarifying the cause of the failure. If the configuration is such that the control information data before and after the failure occurs is stored, the RAM capacity required for control is squeezed and a new RA is added.
If M is added, there is a problem that the control unit is enlarged and the cost is increased.

Therefore, the present invention focuses on an operation management device for recording operation data mounted on a commercial vehicle or the like, and its RAM
The purpose of the present invention is to make it possible to collectively record the control information data before and after the failure occurrence without burdening the RAM of various electronic control systems.

[0005]

Therefore, as shown in FIG. 6, an operation management device A for recording vehicle operation data in the RAM.
And a data rewriting means 21 for connecting various electronic control devices B mounted on the same vehicle to each other through a communication network C and storing the latest control information data alternately in two areas of the RAM 20 in the various electronic control devices B at a predetermined cycle. While the control system A is provided with the data transmission processing means 22 for outputting the control information data stored in the two areas of the RAM 20 as the transmission data of the communication network C in the order before and after the failure, the operation management device A is provided with various electronic control devices. A data reception processing means 32 for receiving the transmission data of B from the communication network C, and a data recording means 31 for storing the reception data with the identification information of the electronic control unit B and the failure occurrence time in the RAM 30 are provided. In addition, R
Data transfer means 33 for transferring the data stored in the AM 30 to the IC card is provided.

[0006]

In normal operation (the operation process for the controlled object such as the actuator of the electronic control unit B is normally performed), the RAM 2
The latest control information data is written in the two areas A and B of 0 by erasing the old control information data alternately at a predetermined cycle.
When some failure occurs, the data stored in the RAM 20 is transmitted to the operation management device A via the communication network C in the order before and after the failure. This transmission data is the operation management device A
Then, it is recorded in the RAM 30 together with the identification information of the electronic control unit B and the failure occurrence time. Therefore, even if a failure occurs many times during traveling, the history of these failures is all recorded in the RAM 30 of the operation management device. Therefore, based on this stored data, for example, after the operation of the vehicle ends, control before and after the failure is performed. It is possible to effectively clarify the cause of the failure by reproducing and analyzing the state and the running condition.

If the data stored in the operation management device A can be transferred to an IC card, the IC card can be used to easily and accurately process the cause of the failure with an external personal computer or the like. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1-3 are various electronic control devices for a vehicle (for example, an electronic timer control device for a fuel injection pump,
A control unit composed of a microcomputer as a brake anti-skid system control device, a transmission speed change control device, etc., 6 is based on the detection signals of the engine speed sensor 9 and the vehicle speed sensor 10 with the ignition switch 11 being turned on as a starting condition. An operation management device for recording vehicle operation data is provided between the operation management device 6 and the control units 1 to 3 and a data bus 4 of a communication network for connecting them to each other.

As is well known, each of the control units 1 to 3 is provided with a CPU, a ROM, a RAM 5 and the like. Based on the control data of the RAM 5 by a control program stored in the ROM, the CPU receives actuator detection signals from various sensors. Although not shown in the drawings except for the RAM 5, the latest control information data (for example, various types of data) is stored in two areas of the RAM 5 (areas A and B of the memory map shown in FIG. 3) in the control cycle. Signal input value from the sensor,
Data rewriting means for alternately storing the control output value to the actuator) and R when a control system failure occurs.
Data transmission processing means for outputting the control information data stored in the two areas of AM5 as transmission data of the communication network in the order before and after the failure is added.

The operation management device 6 also has an internal structure other than the RAM 7 not shown in the drawing, but the detection signals of the engine rotation sensor 9 and the vehicle speed sensor 10 are used as vehicle operation data in the RAM.
In addition to the data inputting means for recording in 7 and the data transferring means for transferring the data stored in the RAM 7 to the IC card 8, the data receiving processing means for receiving the transmission data of the control units 1 to 3 from the communication network, and the receiving means. A data recording means is provided for inputting data to the RAM 7 with corresponding identification information (ID) of the control units 1 to 3 and a failure occurrence time.

2 and 4 are control units 1 to 3.
In the flowchart for explaining the data update process (interruption routine) and the data transmission process (subroutine) performed in the data storage process, the data storage process is performed in a control cycle (for example, 100 m).
s), and if the A flag is 1 at normal time (failure flag is 0) as shown in FIG.
The control information data is input to and the A flag is reset to 0 (1.01 → 1.12 to 1.14). Also,
Similarly, if the A flag is not 1, the control information data is input to the area B of the RAM 5 and the A flag is set to 1 (1.01 → 1.12 → 1.15, 1.16).

When a failure flag of 1 is determined when a failure occurs, the failure code is stored in the designated area A or B of the RAM 5 corresponding to the A flag at that time, and then the failure data I
In addition to the information such as D and the failure code NO, if the A flag is 1, the storage data of the RAM 5 is used as the control information data before and after the failure in the order of the areas A and B. If the A flag is not 1, the storage data of the RAM 5 is also stored. It transmits to the operation management device in the order of the areas B and A, and then resets the failure flag (1.01 to 1.07 or 1.01, 1.02).
→ 1.08 to 1.11 → 1.07).

FIG. 4 is a flow chart for explaining the recording process (subroutine) of the received data performed in the operation management device 6. When the failure data is confirmed from the ID of the received data, the received data (control information data before and after the failure) becomes The corresponding IDs of the control units 1 to 3 and the failure occurrence time are attached, and these are collectively stored in a predetermined area of the RAM 7 (separated from the operation data recording area) (2.0).
1-2.03).

Therefore, in the normal state (the operation processing for the controlled objects such as the actuators of the control units 1 to 3 is normally performed), the latest control information data in the two areas A and B of the RAM 5 are alternately old at a predetermined cycle. Although the control information data is erased and written, if any failure occurs, the data stored in the two areas of the RAM 5 are transmitted to the operation management device via the data bus 4 in the order before and after the failure. When the operation management device 6 confirms the ID of the failure data, the transmission data is recorded in a predetermined area of the RAM 7 together with the IDs of the control units 1 to 3 and the failure occurrence time.

The failure of the electronic control system depends on its cause, but it often occurs many times during traveling while temporarily recovering the normal state. In this example, the data update is stopped when the control is normally restored. The control information data before and after the failure is communicated to the operation management device 6 each time the failure recurs. In other words, the failure history of the control system is all RAM
Since the data stored in the RAM 7 is transferred to the IC card 8 after the operation of the vehicle is completed, the control information data is collectively collected by an external personal computer or the like using the IC card 8 before and after the failure. It is possible to easily and accurately clarify the cause of the failure by reproducing and analyzing the driving situation.

An electronic notebook is connected to the operation management device 6 to transfer the data stored in the RAM 7 to the IC card, or a failure diagnostic device is also connected to read the control information data before and after the failure from the RAM 7. You can

[0017]

In summary, according to the present invention, the operation management device for recording the operation data of the vehicle in the RAM and the various electronic control devices mounted on the same vehicle are connected to each other through the communication network, and the various electronic control devices are provided. RAM at a predetermined cycle
Data rewriting means for alternately storing the latest control information data in the two areas, and RA when a failure occurs in the control system.
Data transmission processing means for outputting the control information data stored in the two areas of M as transmission data of the communication network in the order before and after the failure is provided, while the operation management device receives the transmission data of various electronic control devices from the communication network. Since the data receiving processing means and the data recording means for storing the received data in the RAM with the identification information of the electronic control unit and the failure occurrence time are provided, even if the failure occurs many times during traveling, these failures occur. Since all the history is recorded in the RAM of the operation management device by data communication, the control status and running condition before and after the failure can be calculated based on the data stored in the operation management device without overwhelming the required RAM capacity of various electronic control devices. By performing the reproducible analysis, it is possible to effectively clarify the cause of the failure.

By making it possible to transfer the data stored in the operation management device to an IC card, it becomes possible to easily and accurately process the cause of the failure with an external personal computer or the like using this IC card.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart of a data update process of a control unit.

FIG. 3 is a memory map of RAM.

FIG. 4 is a flowchart of a data recording process of the operation management device.

FIG. 5 is a diagram corresponding to the claims of the present invention.

[Explanation of symbols]

 1 to 3 control unit 4 data bus of communication network 5 RAM of control unit 6 operation management device 7 RAM of operation management device 8 IC card

Claims (2)

[Claims] 1. An operation management device for recording vehicle operation data in a RAM and various electronic control devices mounted on the same vehicle are connected to each other via a communication network, and the various electronic control devices are provided in two areas of the RAM at predetermined intervals. Data rewriting means for alternately storing the latest control information data, and data transmission processing means for outputting the control information data stored in the two areas of the RAM as transmission data of the communication network in the order before and after the failure when the control system fails. On the other hand, a data reception processing means for receiving transmission data of various electronic control devices from the communication network in the operation management device, and a data recording means for storing the received data in the RAM with identification information of the electronic control device and failure occurrence time. A vehicle management system device comprising: 2. The operation management device stores the data stored in the RAM as I
The management system apparatus according to claim 1, further comprising a data transfer unit that transfers the data to a C card.