JP2002149432A - Control data update management device for vehicle controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control data update management device whose reliability is high and which is free from the forgetfulness of the initialization of a backup memory capable of reducing the work man-hours while holding a small number of components. SOLUTION: At the time of writing a control program, a program writing control circuit 15 writes the information of 'update' in an update mark area 12c of a flash memory 12, and writes a program such as a vehicle control program in a control program area 12a, and writes a learning value or the initial value of control data in a control data area 12b. When an ECU is started according to ignition ON, a control data initialization processing part 131 is operated, and whether or not the recorded contents of the update mark area 12c are the state of 'update' is judged, and in the case of 'update', the contents recorded in the control data area 12b are transferred to a backup memory 64. Then, the recorded contents of the update mark area 12c are rewritten from the state of 'update' to the state of 'non-update', and vehicle control by the ECU is started.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control data update management system for a vehicle control device that stores control data as a learning value and executes a control program using the control data.

[0002]

2. Description of the Related Art A plurality of electronic control units (hereinafter referred to as "ECUs: El
Japanese Patent Application Laid-Open No. H11-308253 discloses a vehicle control device in which a plurality of ECUs mounted on a vehicle connected by an in-vehicle LAN control each part of the vehicle by connecting the common control unit to a common signal line. ing. An example of such a conventional ECU configuration of the vehicle control device will be described with reference to FIG. In FIG. 5, the MPU 51
By executing the control program recorded in the control program ROM 52 connected to the PU 51, the ECU 5
MPU (Micro Processing) that realizes the control operation performed by
Unit). The data ROM 53 stores a learning value when the MPU 51 executes the control and an initial value of the control data.
When the OM 53 is connected to the MPU 51 (for example, when the data ROM is mounted on a socket or the like on a printed circuit board), the data is transferred to the backup memory 54 which is specially connected to a power source and can hold the recorded contents. MPU
Reference numeral 51 uses the control data transferred to the backup memory 54 as a threshold value for determination processing in the control program. Further, the input circuit 100 takes in the measured values acquired by the sensors / SWs 200 for monitoring the state of the components in each part of the vehicle into the MPU 51, and outputs the measured values to the output circuit 101.
Outputs a control signal from the MPU 51 to an actuator (a device for converting a control signal into an actual motion, an electric motor, a hydraulic device, or the like) in each part of the vehicle. Note that the backup memory 54 retains its contents even when the vehicle control device stops, so that the measured value (for example, the remaining battery of the electric vehicle) obtained from the input circuit 100 that changes every moment to control the vehicle is obtained. This is suitable as a recording area for a learning value (for example, a correction coefficient of a fuel injection amount called “Kref” set for each engine) that the MPU 51 learns and records by itself during control.

Recently, for the purpose of reducing the number of parts, FIG.
The ECU shown in FIG. In FIG. 6, MP
U61 is a flash memory 6 built in the MPU 61
By executing the control program recorded in the second control program area 62a in the arithmetic circuit 63, E
It is an MPU that implements control operations performed by the CU 60. In the control program area 62b of the flash memory 62, M
The learning value and the initial value of the control data when the PU 61 executes the control are recorded. The MPU 61 is transferred from the control program area 62b to the backup memory 64 to which the power supply is specially connected and which can hold the recorded contents. The control data obtained is used as a threshold value for a judgment process in the control program. The recorded contents of the flash memory 62 are as follows.
Rewriting is performed by the program writer 300 via the program write control circuit 65.

[0004]

However, the above-described apparatus has the following problems. That is, for example, when the content of the control program ROM 52 is changed, the learning value and the control data up to that time are changed to the new learning value and the initial value of the control data adapted to the new control program. Initialization is required. First, in the ECU as shown in FIG. 5, a data ROM 53 is mounted on a socket or the like on a printed circuit board of each ECU that is plurally present in the vehicle and is distributed throughout the vehicle and has a backup memory. Rewriting the contents of 54 required a great deal of man-hours. Second, the ECU shown in FIG. 6 has a new problem that the data update timing cannot be detected based on the presence or absence of the data ROM 53 as in the ECU shown in FIG. For this reason, in the ECU shown in FIG. 6, the power supply connected to the backup memory 64 is turned off, thereby erasing the data contents held and recorded, and the new learning values and the initial values of the control data are stored in the control data area 62b. The work of transferring occurred, requiring more man-hours.
Further, in order to eliminate the necessity of detecting the update timing and avoid forgetting to initialize the backup memory 64,
For example, when the power is turned on, a new learning value and an initial value of control data are stored in the backup memory 64 from the control data area 62b.
In the case of a configuration in which the learning value is transferred to the control data area 62b, there is a problem that the recorded content of the learning value cannot be maintained because the previously recorded learning value is always rewritten to the content of the control data area 62b.

The present invention has been made in view of the above-mentioned problems, and provides a highly reliable control data update management device that can reduce the number of work steps while keeping the number of parts small, and can avoid forgetting to initialize a backup memory. The purpose is to:

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 uses the control data written in the control data storage means (for example, the control data area 12b of the embodiment). A control data update management device of a vehicle control device for controlling a vehicle by executing a control program written in a control program storage means (for example, the control program area 12a of the embodiment), which changes during vehicle control. Storing the control data as a learning value,
A control data holding unit (for example, the backup memory 64 of the embodiment) for holding the stored contents by a power source different from the power source of the vehicle control device, and information indicating a change of the control program or the control data are updated information (for example, Form of
The contents stored in the rewrite state storage means (for example, the update mark area 12c of the embodiment) for storing as "updated" or "unupdated" update marks) and the contents stored in the control program storage means or control data storage means are changed. At this time, a program rewriting means (for example, the program writing control circuit 15 of the embodiment) for setting information indicating a change of the stored contents in the rewriting state storing means, and the stored contents in the rewriting state storing means when the vehicle control device is started. When the information indicating the change is set, the control data holding means for transferring the control data written in the control data storage means to the control data holding means is initialized, and the control program stored in the rewrite state storage means is changed. Control data initialization means for resetting the information indicating (for example, the control data initialization of the embodiment) With the above configuration, when the control program or the control data is rewritten, when the vehicle control device is started for the first time, the control of the learning value and the like stored in the control data holding means is performed. It is possible to realize a device in which the data is initialized and thereafter the control data holding means is not initialized unless the control program or the control data is rewritten.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration of an ECU of the program update management device according to the present embodiment. FIG. 1 describes only the functions of the ECU relating to the control data update management device. In FIG.
The MPU 11 executes the control program recorded in the control program area 12 a of the flash memory 12 connected to the MPU 11 in the arithmetic circuit 13,
It is an MPU that implements control operations performed by the ECU 10. A learning value and an initial value of control data when the MPU 11 executes control are recorded in the control program area 12b. The MPU 11 is connected to a special power source from the control program area 12b and holds the recorded contents. The control data transferred to the backup memory 64 that can be used is used as a threshold value for determination processing in the control program. The recorded contents of the flash memory 12 are rewritten by the program writer 300 via the program write control circuit 15. Further, the program write control circuit 15 controls the control program area 1 of the flash memory 12.
2a, a new control program is stored in the control data area 12b.
At the same time, a new learning value and an initial value of control data are written in the update mark area 12c, and information of "update" is recorded in the update mark area 12c. Further, a signal from an ignition circuit (not shown) indicating a start command of the vehicle control device is input to the MPU 11, and when the vehicle control device is started, the control data initialization processing section 131 stores the control data in the control data area 12b. The recorded contents are transferred to the backup memory 64 and the update mark area 12
The information of “update” of c is rewritten to the information of “unupdated”.
The transfer of the learning value and the initial value of the control data from the control program area 12b to the backup memory 64 will be described later in detail. Components given the same reference numerals as those in FIGS. 5 and 6 are the components described in FIGS. 5 and 6, and the description thereof is omitted here. The control data initialization processing unit 131 is a processing unit that is executed by a program in the MPU 11.

Next, the control procedure of the control data update management device according to the present embodiment will be described with reference to the flowcharts shown in FIGS.
This will be described with reference to a schematic diagram showing changes in recorded contents and operations of the MPU 11 shown in FIG. First, the control program update operation of the control data update management device of the present embodiment will be described with reference to the flowchart of FIG. Initially, the recorded contents of the MPU 11 before the program or data change is as shown in FIG.
As shown in a. The update mark area 12c is "not updated", b. The control program area 12a is in the state of "old program", c. The control data area 12b is in the state of "old data", d.

In FIG. 2, when a control program is written into the ECU, a program control circuit 15 to which a new control program or control data has been written from the program writer 300 is first stored in the update mark area 12 c of the flash memory 12. The information of "update" is set (step S1). Next, the vehicle control program, the update mark erasing program, and the learning value initialization program are written in the control program area 12a of the flash memory 12, and subsequently, the learning value and the initial value of the control data are written in the control data area 12b (step S2). Thereby, the MPU 1 after the program or data is changed
4 shows, as shown in FIG. 4B, a. The update mark area 12c is "update", b. The control program area 12a is in the state of "new program", c. The control data area 12b is in the state of "new data", d.

Next, the control data update operation of the control data update management device of the present embodiment will be described with reference to the flowchart of FIG. In FIG. 3, when the ECU is started by turning on the ignition, first, the control data initialization processing unit 1
31 is activated to determine whether or not the recorded content of the update mark area 12c is in an "updated" state (step S1).
1). In step S11, the update mark area 12c
Is "update" (YES in step S11: this state indicates that the power is turned on for the first time after the program and data are changed), the control data initialization processing unit 131
Executes the learning value initialization program, and executes the control data area 1
The learning value is initialized by transferring the content recorded in 2b to the backup memory 64 (step S12). After initializing the learning value, the control data initialization processing unit 131 next executes the update mark erasing program, resets the recorded content of the update mark area 12c from the “updated” state to the “unupdated” state. Rewriting (step S13),
The vehicle control by the ECU is started. As a result, the contents recorded in the MPU 11 when the power is turned on for the first time after the change are as shown in FIG.
As shown in (C): a. The update mark area 12c is "not updated", b. The control program area 12a is in the state of "new program", c. The control data area 12b is in the state of "new data", and d. The backup memory 64 is in the state of "learning value initialization".

In step S11, when the recorded content of the update mark area 12c is "not updated" (NO in step S11: this state indicates that the power is turned on for the second time after the program and data are changed). E without doing anything
The vehicle control by the CU is started. As a result, after the change
The recorded contents of the MPU 11 when the power is turned on after the second time are shown in FIG.
As shown in (D): a. The update mark area 12c is "not updated", b. The control program area 12a is in the state of "new program", c. The control data area 12b is in the state of "new data", d. The backup memory 64 is in the state of "learning value storage", and the learning value is stored.

[0012]

As described above, according to the first aspect of the invention, the initialization of the control data holding means occurs only when the vehicle control device is first started after rewriting the control program or the control data. Therefore, the effect that the learning value can be stored is obtained. Also, the control program,
Alternatively, when the control data is rewritten, the control data holding means is initialized, so that the data
It is possible to avoid the occurrence of useless man-hours, such as mounting the OM and cutting off the power supply connected to the control data holding unit, thereby erasing the data stored and recorded in the control data holding unit. . Further, when the control program or the control data is rewritten, the control data holding means is automatically initialized, so that it is possible to avoid forgetting to initialize the control data holding means. Therefore, it is possible to obtain a highly reliable control data update management device in which the number of parts is reduced, the number of work steps is reduced, and the initialization of the backup memory does not occur.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a control data update management device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a control program update operation of the control data update management device of the embodiment.

FIG. 3 is a flowchart showing a control data update operation of the control data update management device of the embodiment.

FIG. 4 is a schematic diagram showing changes in recorded contents and operations of the control data update management device of the embodiment.

FIG. 5 is a block diagram showing a configuration of a conventional ECU.

FIG. 6 is a block diagram showing a configuration of another conventional ECU.

[Explanation of symbols]

 12a control program area 12b control data area 12c update mark area 131 control data initialization processing unit 15 program write control circuit 64 backup memory

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuji Hase 1-4-1 Chuo, Wako-shi, Saitama Pref. Inside of Honda R & D Co., Ltd. (72) Yuki Tatsutomi 1-4-1 Chuo, Wako-shi, Saitama No. Inside Honda R & D Co., Ltd. (72) Inventor Toshiaki Hirota 1-4-1 Chuo, Wako-shi, Saitama Pref. Inside Honda R & D Co., Ltd. (72) Hiroyuki Abe 1-4-1 Chuo, Wako-shi, Saitama Pref. No. F-term in Honda R & D Co., Ltd. (reference) 3G084 DA13 DA26 EB02 EB06 EB07 FA36 5B076 EB02

Claims (1)

[Claims] 1. A control data update management device for a vehicle control device for controlling a vehicle by executing a control program written in a control program storage device using control data written in the control data storage device. A control data storage unit that stores control data that changes during vehicle control as a learning value, and stores storage contents using a power supply different from a power supply of the vehicle control device; and changing the control program or the control data. Rewriting state storage means for storing information as update information, and information indicating a change in storage contents in the rewriting state storage means when the content stored in the control program storage means or the control data storage means is changed. A program rewriting means for setting the rewriting state storage means when the vehicle control device is activated. When the information indicating the change of the contents is set, initialization of the control data holding means for transferring the control data written in the control data storage means to the control data holding means, and the control data stored in the rewriting state storage means are stored. A control data initializing means for resetting information indicating a change of the control program; and a control data update management device.