JPH09304238A - Data analyzer of electronic controller for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable efficient data analysis by obtaining real data of a parameter for storing, converting the data into a physical value according to a conversion formula in stored environmental data and displaying it corresponding to a parameter name. SOLUTION: A data analyzer comprises a control circuit, an interface circuit and an electronic control circuit (ECU). A CPU 51 of the ECU stores a sensor output in a RAM 53 and has it read by a DP-ROM 25 in a monitor circuit 4 of the interface circuit. A CPU of the control circuit selects a desired RAM address file by keyboard operation. The RAM address file exists for each ECU, recording a LBS file including a formula number, a physical conversion parameter, etc. The CPU of the control circuit reads the most recent data from the DP-ROM 25, further reads a corresponding LBS code, and applies the most recent data to a specified conversion formula for calculating a physical value. The resulted physical value and a physical quantity unit of the LBS file are displayed on a display by an instruction from the CPU of the control circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data analysis device for reading and displaying actual data indicating an operating state of an electronic control unit for a vehicle such as an electronic fuel injection device mounted on an automobile.

[0002]

2. Description of the Related Art An electronic control unit for a vehicle is for controlling an operating state of a vehicle-mounted internal combustion engine to an optimum state.
For example, in an internal combustion engine that supplies fuel using injection, an electronic fuel injection device that detects the amount of fuel to be supplied by a vehicle and an operating state of an engine by a sensor and calculates and controls according to the sensor detection value is used. well known.

A control operation state of such an electronic control unit,
For example, tests are conducted by actually mounting an electronic control unit on a vehicle and operating an engine or running the vehicle in order to determine whether or not a sensor or a control unit main body is operating normally. . In the test, output values and calculated values of each sensor were taken out as data from the electronic control unit, stored in a memory and analyzed.

[0004]

However, since these sensor output values and calculated values are actual values for control, values that cannot be obtained as physical values that a tester or the like can easily understand unless converted by some conversion formula. Is. Therefore, the tester is inconvenient because he / she cannot know the actual physical value without separately calculating and analyzing the accumulated data using a computer or the like.
The problem is that efficient data analysis is difficult.

Therefore, an object of the present invention is to provide a data analysis device that enables efficient data analysis of actual data obtained during the control operation of the vehicle electronic control device.

[0006]

A data analysis apparatus for an electronic control unit for a vehicle according to the present invention provides actual data of detection or control parameters obtained during control in an electronic control unit for controlling an internal combustion engine mounted on a vehicle. At least one of a data analysis device for analyzing, comprising: environmental data storage means for preliminarily storing environmental data including conversion formulas for converting actual data into physical values for each of a plurality of parameters; and an electronic control device.
Real data storage means for sequentially obtaining and storing real data of one parameter, and control means for converting the real data obtained from the real data storage means into physical values according to the conversion formula in the environment data obtained from the environment data storage means And a means for displaying the physical value converted by the control means in association with the parameter name.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. The data analysis device of the vehicle electronic control device shown in FIG. 1 includes a control circuit 1 and an interface circuit 2. As will be described later, the interface circuit 2 includes an ECU (electronic control unit) 3 of an electronic control unit.
Is connected. The control circuit 1 is composed of a microcomputer and has a built-in display. As the control circuit 1, for example, a notebook personal computer can be used. However, a schematic configuration of the control circuit 1 is shown in FIG. 2 for ease of explanation. That is, in the control circuit 1, a CPU (central processing unit) 11, a RAM (random access memory) 12 and a ROM (read only memory) 13 are connected to an internal bus 14, and the internal bus 14 is a chip for timing control. It is connected to the external bus 16 via the set 15. A hard disk drive 17 and a display control circuit 18 are connected to the external bus 16, and the display control circuit 18 is a CP.
The display control of the display 19 is performed according to the instruction from U11. A keyboard 20 is connected to the internal bus 14 via an operation control circuit 20a. The keyboard 20 has function keys, an enter key,
In addition to the arrow keys and ESC (escape) key, at least alphabetic character keys and ten keys are provided.

The interface circuit 2 is basically for relaying the measurement data (actual data) supplied from the ECU 3 to the control circuit 1 based on a command from the control circuit 1, the monitor circuit 4 and the analog circuit. 5 and a bus connection circuit 6. In the monitor circuit 4, as shown in FIG. 3, a CPU 21, a ROM 22, a RAM 23, an input / output circuit 24, and a DP (dual port) -RAM 25.
Are connected by a common bus. Input / output circuit 24
Has a port for serial communication conforming to the standard such as RS-232C, to which not only the ECU 3 but also the temperature measuring unit 7 is connected. The CPU 21 controls the operation in the monitor circuit 4, and operates according to a program stored in the ROM 22 in advance. RAM23 is this C
The data necessary for the control operation of the PU 21, for example, the connection state and the like are stored in the port for the current serial communication. The DP-RAM 25 has two ports for input and output, and data supplied from the ECU 3 or the control circuit 1
It is for temporarily storing the command supplied from. Further, the DP-RAM 25 is connected to the bus connection circuit 6, and this connection line includes an interrupt request line as well as a data line.

In the analog circuit 5, as shown in FIG. 3, similarly to the monitor circuit 4, the CPU 31 and the ROM 3 are provided.
2, RAM 33, input / output circuit 34 and DP-RAM 35
Are connected by a common bus. However, the input / output circuit 34 includes an A / D converter, a D / A converter, and a pulse measuring device (both not shown). These are connected to an external voltage output type output device such as a voltage output type sensor or a pen recorder (both not shown) via an analog signal port.

The bus connection circuit 6 is the DP-R of the monitor circuit 4.
The input / output of the AM 25 and the DP-RAM 35 of the analog circuit 5 is mechanically and electrically connected to the external bus 16 of the control circuit 1. The ECU 3 connected to the data analysis device having such a configuration has a CPU 5 as shown in FIG.
1, a ROM 52, a RAM 53, a serial communication input / output circuit 54, a sensor input interface circuit 55, and an actuator drive circuit 56, which are connected to each other by a common bus. A plurality of sensors are connected to the sensor input interface circuit 55, and an actuator such as an injector is connected to the drive circuit 56. As the sensor, an oxygen concentration sensor that generates an output voltage according to the oxygen concentration in the exhaust gas in the exhaust pipe of the internal combustion engine, an intake pipe internal pressure sensor that generates a voltage according to the absolute pressure in the intake pipe of the internal combustion engine, the internal combustion engine There are various sensors such as a crank angle sensor that generates a pulse signal according to the number of revolutions of the crankshaft, a cooling water temperature sensor that detects the temperature of the cooling water of the internal combustion engine, and the like.

The CPU 51 of the ECU 3 operates according to a program stored in advance in the ROM 52, reads the output values of the plurality of sensors via the sensor input interface circuit 55 and stores them in the RAM 53, and the actuators in accordance with the output values of the sensors. To generate a signal for driving the drive circuit and supply it to the drive circuit 56. For example, when driving the injector, the basic fuel injection amount is calculated from the absolute intake pipe internal pressure based on the output value of the intake pipe internal pressure sensor and the engine speed obtained from the output value of the crank angle sensor. The fuel injection amount is calculated by correcting the amount with the air-fuel ratio information obtained from the output value of the oxygen concentration sensor, the engine temperature information obtained from the cooling water temperature sensor, etc., and the injector is driven according to the fuel injection amount. In this way, the ECU 3 sequentially obtains readings of various sensors, intermediate values such as the basic fuel injection amount, and values such as drive values such as the fuel injection amount with the passage of time. Each value is written as actual data in a predetermined address of the RAM 53 and updated. The data analysis device reads each data in the RAM 53 and analyzes the data. Therefore, during data analysis, the serial communication port of the serial communication input / output circuit 54 of the ECU 3 is connected to the serial communication port of the input / output circuit 24 of the monitor circuit 4.

The operation when the power of the data analysis device is turned on while the ECU 3 is connected to the data analysis device will be described. Of course, it is assumed that the ECU 3 is mounted on a vehicle and is in control operation. As shown in FIG. 5, the CPU 11 of the control circuit 1 first causes the display control circuit 18 to display a monitor image (step S).
1). FIG. 6 shows a monitor image, and each of the 16 frames is a channel window for displaying the parameter value obtained by the ECU 3. FIG. 7 specifically shows the contents of each display area in the channel window. Figure 7
In the above, "Ch No." is displayed slightly to the left of the channel window, and is a channel number set by the user as to where to assign the parameter value to be displayed. The channel numbers in the channel window are, for example, up to 48 channels, but the number of channels simultaneously displayed on the screen is 16 kinds of parameters, that is, 16 channels. "Label name" is a name indicating a parameter for displaying a value. For example, if the label name is "NE", engine speed, if "TA", engine intake temperature, "PBA"
If so, it means "absolute pressure in intake pipe". The “monitor display value” is a hexadecimal actual data value display of the parameter displayed by the label name, and “hex” next to it is a hexadecimal number. “Physical value display” is a decimal number display that indicates the parameter value displayed by the label name using a unit, and the “physical value unit” next to it is the unit. For example, the physical value unit of the engine speed is rpm, and the physical value unit of the intake pipe absolute pressure is mmHg.

In the monitor screen shown in FIG. 6, the display intermittently arranged in the lower part indicates ten function keys f.multidot.1 to f.multidot.10 provided on the keyboard 20 of the control circuit 1.
It is a guide display (not shown). "Settings" on the left side of the screen
Corresponds to the function key f. 1 and then to the right corresponds to the function key numbers in the display order. CPU
Reference numeral 11 determines whether or not the function key f · 9 corresponding to “environment” is operated in the display state of the monitor image (step S2). When the function key f-9 is operated, the environment setting mode is entered, and the display control circuit 18 displays the selected image of the RAM address file in a window on the monitor image of the display 16 (step S3). The RAM address file is a file that differs depending on the ECU or the vehicle on which it is mounted. As shown in FIG. 8, a label name for each parameter, a description of the label name,
Address of the internal RAM 53 of the ECU 3, data size W
This is a file in which / B and LSB codes are recorded. There is a RAM address file corresponding to each ECU 3 connected to the data analysis device. A plurality of RAM address file names registered in advance are continuously displayed on the display screen as windows, and one of the plurality of RAM address file names is an arrow provided on the keyboard 20 of the control circuit 1. It is highlighted by operating the cursor with the keys. After the desired RAM address file name is selected, the selection is determined by operating the enter key. The CPU 11 executes R after executing step S3.
It is determined whether or not the AM address file name has been selected and determined (step S4). When the RAM address file name of 1 is determined, the RAM address file name is read (step S5), and the display of the selected image of the RAM address file is terminated (step S6).

The data size W / B in the RAM address file indicates whether the data is word data (2-byte data) or 1-byte data. L
The SB code is a code for specifying the LSB data in the LSB file. The LSB file has a file structure as shown in FIG. That is, a code number that is an LSB code, a label name, a physical quantity unit, a formula number,
The portion consisting of the data length and the physical conversion parameters f0, f1 ... Is the LSB data corresponding to one measurement parameter, and a plurality of LSB data is continuously formed in the LSB file in the order of code numbers. The formula number is a number for specifying a conversion formula separately stored in the hard disk drive 17 in order to calculate the physical value from the actual value of the measurement parameter, and the physical conversion parameters f0, f1 ... Are used in the conversion formula. Such as a coefficient.

After executing step S6, the CPU 11 of the control circuit 1 returns to step S2. If the function key f.9 has not been operated in step S2, it is determined whether or not the function key f.1 corresponding to "setting" has been operated (step S7). When the function key f-1 is operated, the channel setting operation is performed (step S8). That is, in the channel setting, one frame of a plurality of channel display frames shown on the screen of the display 19 as a monitor image is made into a thick line frame, which becomes the current cursor position and is operated by operating the arrow keys. The cursor position is movable. When you move the cursor to the desired channel display frame with the arrow keys and then operate the enter key, the label names contained in the selected RAM address file are continuously displayed in the window, and the desired label name is moved with the arrow keys. After moving the position, select and confirm by operating the Enter key. By doing so, the correspondence between the channel number and the parameter to be measured is determined, and the reception channel storage area showing the correspondence is formed in the RAM 12. This channel setting operation can be repeated for any number of channels. By performing the channel setting operation in this manner, for example, a reception channel storage area as shown in FIG. 10 is formed.

Each time the channel setting operation is performed, the CPU 11 determines whether or not the ESC key has been operated (step S9). If the ESC key is not operated,
Further, step S8 is repeated to perform the channel setting operation. On the other hand, when the ESC key is operated, the control circuit 1 sets the correspondence relationship between each channel number stored in the channel storage area and the address of the RAM in the ECU 3 to D.
The data is written in the P-RAM 25 (step S10). DP-
In the RAM 25, for example, a data storage area is formed as shown in FIG. When the control circuit 1 finishes writing the correspondence in the DP-RAM 25, it issues an interrupt signal indicating a start command for starting the data communication (step S11). This interrupt signal is DP-RAM25
Is written in as data.

On the other hand, the CPU 21 of the monitor circuit 4 is shown in FIG.
2, the DP-RAM 25 has a predetermined timing.
It is determined whether or not the interrupt signal of the start command is written therein (step S51). When the interrupt signal of the start command is written, the CPU 21 causes the monitor circuit 4 and the EC to operate.
Start serial communication with U3. That is, CPU
21 sets the channel number n to 1 (step S5
2) From the data table of DP-RAM 25
The address corresponding to the channel n-ch is read (step S53), and the serial signal of the data request for the read address is transmitted via the input / output circuit 24 (step S54).

When a serial signal is supplied from the monitor circuit 4 to the serial communication input / output circuit 54, the CPU 51 of the ECU 3 reads the address indicated by the serial signal and places it in the RAM 53 at the storage location designated by the read address. The stored data value is read and supplied to the serial communication input / output circuit 54. As described above, the value stored in the storage location designated by the address is the value detected by the sensor or the calculated value such as the fuel injection amount.
The serial communication input / output circuit 54 transmits as a serial signal indicating the data value.

The CPU 21 of the monitor circuit 4 executes step S
After executing 54, the serial communication input / output circuit 54 of the ECU 3
Determine whether the serial signal from the
(Step S55). If the serial signal is supplied
Read the value indicated by the serial signal
At the memory location corresponding to the channel number n-ch of M25
Write (step S56). The CPU 21
Add 1 to the channel number n (step S57), and
New channel number n is maximum channel number n
_maxDetermine if greater than (eg, 48)
(Step S58). n ≦ n_maxIf step S
Return to 53 and perform the above operation for the next channel number.
repeat. n> n_maxIf so, return to step S52
Repeat the above operation for the first channel 1-ch
You.

By performing such a serial communication operation, the DP-RAM 25 has a RAM for each channel.
The data values (hexadecimal data) read from 53 are written in the reading order. In addition, DP-RAM2
The write position of 5 is moved up for each channel by a counter (not shown), and when the final writable storage position is reached, the counter is reset so that the next write position returns to the first storage position. There is.

When such serial communication operation is started, the CPU 21 of the monitor circuit 4 generates an interrupt signal at a predetermined timing (for example, every 100 msec). Since this interrupt signal is written in a predetermined storage position of the DP-RAM 25, it is transmitted to the CPU 11 of the control circuit 1. Therefore, as shown in FIG. 13, the CPU 11 causes the function key f.
It is determined whether 6 has been operated (step S21).
When the function key f.6 is operated, the data storage mode is entered, and the time data at the time when the operation of the function key f.6 is detected is stored in the control circuit 1 itself from a time counter (not shown). Read and write in the header section of the received data storage area (step S2
2). This time data indicates the data recording start time. C
The PU 11 reads the measurement data of each channel of the DP-RAM 25 in response to the interrupt signal at a predetermined timing (step S23), and writes the read measurement data to the storage position of the reception data storage area of the RAM 12 in association with the channel. (Step S24), the data counter provided at the head of the storage position of the written reception data storage area is incremented by 1 (step S25).
Since this data reading operation is performed via the external bus 16, it is extremely faster than the data transmission rate of serial communication. Therefore, one data of all channels already written in the DP-RAM 25 is read and the received data is stored. Written in the area. The data counter indicates the number of read data common to all channels. C in DP-RAM25
The storage position of the data read by the PU 11 is marked for each channel by a counter (not shown) so that new data can be written. The reception data storage area is, for example, as shown in FIG.

When the CPU 11 finishes writing the data in the received data storage area, it determines whether or not the function key f.7 corresponding to "stop" has been operated (step S26). If the function key f · 7 is not operated, the CPU 21 of the next monitor circuit 4 waits for the generation of an interrupt signal. On the other hand, if the function key f · 7 is operated, an interrupt signal indicating a stop command for stopping the data communication is issued (step S27). Since the capacity of the received data storage area of the RAM 12 is limited, an interrupt signal indicating a stop command is generated even when the final storage position is reached.

The interrupt signal indicating this stop command is DP-
The data is written in the RAM 25 as data. Therefore, as shown in FIG. 15, the CPU 21 of the monitor circuit 4 determines whether or not the interrupt signal of the stop command is written in the DP-RAM 25 at a predetermined timing (step S6).
1). If a stop command interrupt is written, CP
U21 controls the input / output circuit 24 to monitor the monitor circuit 4 and the EC.
Stop serial communication with U3 (step S6)
2).

The CPU 11 of the control circuit 1 executes step S27.
After executing, the function key f corresponding to "Save"
.It is determined whether or not 8 is operated (step S2
8). When the function key f · 8 is operated, the contents of the received data storage area of the RAM 12 are stored in the hard disk drive 17 as a data file (step S29). At the time of this storage, the file name is given by the user. If the function key f · 8 is not operated, the contents of the reception data storage area of the RAM 12 are maintained as they are.

The CPU 11 of the control circuit 1 is the above-mentioned serial
Screen display operation as background processing of communication
Do. In this screen display operation, as shown in FIG.
As shown in the DP-RAM25 data table
Read the latest measurement data (hexadecimal data) for RA
In the latest data storage area as shown in FIG. 17 in M12
Write for each channel (step S31)
The channel number m is set to 1 (step S32), and the m-th channel
The LSB code corresponding to the channel m-ch is stored in the RAM 12
Read from the channel storage area (step S33),
Of the LSB file specified by the LSB code
The contents are read (step S34). Is it an LSB file?
Physical unit, formula number, data length, physical conversion parameter
Data such as data can be obtained, so conversion specified by the formula number
The formula is read from the ROM 13 and the physical conversion pattern is written in the conversion formula.
Apply the latest data of parameter and read m-ch
Then, the physical value is calculated (step S35). CPU11
Shows the physical value of this calculation result in RAM1 as shown in FIG.
In the result data storage area in 2, the m-th channel m-ch
Write corresponding to (step S36), channel
1 is added to the number m (step S37), and the new check
Channel number m is maximum channel number n_maxGreater than
It is determined whether or not (step S38). m ≦ n_maxof
If so, go back to step S32 and go to the next channel number.
Then, the above operation is repeated. m> n _maxIn case of
A display command is issued to the display control circuit 18 (step
S39).

This display command is issued according to the latest data storage area, the result data storage area, and the physical quantity unit of the LSB file. The display control circuit 18 has a display 19
On the monitor video screen displayed on the screen, the latest data for each channel obtained from the latest data storage area is displayed in the monitor display range shown in FIG. The physical value of the calculation result for each channel is displayed in the physical value display area shown in FIG. 7 in the display window of the corresponding channel, and the physical quantity unit of the LSB file for each channel is shown in FIG. 7 in the display window of the corresponding channel. It is displayed in the indicated physical value unit display area.

It should be noted that instead of displaying physical values numerically,
On the monitor video screen, it is also possible to display a graph as shown in FIG. 19 by operating the function key f · 3 corresponding to “graph”. The CPU 11 of the control circuit 1 uses the function key f corresponding to "end".
-It is determined whether or not 10 has been operated (step S3
0). When the function key f · 10 is operated, this routine is finished. As described above, since the data of a plurality of channels are acquired from the ECU 3 and stored in the reception data storage area of the RAM 12 or the hard disk drive 17, the operation of analyzing and displaying these data is started.

The operation of analyzing and displaying the measured actual data on the display 19 will be described. Control circuit 1
In the analysis display operation, the CPU 11 first instructs the display control circuit 18 to display the time chart basic image as shown in FIG. 20 (step S81). The time chart basic image is predetermined as data in the display control circuit 18, and the time chart basic image is not analyzed and displayed but only a pull-down menu is displayed at the upper part. Then, a data file having the measurement data to be displayed is determined (step S8).
2). This is done by reading the selection result because the user selects a file name from the pull-down menu on the screen by key operation. When the data file is determined, the data file designated by the file name is read from the hard disk drive 17 (step S83). The specified data file is RA
If the hard disk drive 17 is not yet saved in the received data storage area of M12, it is read from the RAM 12. Then, from the label names included in the read data file, the label name relating to the measurement data to be displayed is determined (step S84). This is also done by reading the selection result because the user selects the label name from the pull-down menu on the screen by key operation. Alternatively, the measurement parameters assigned to each channel included in the header of the read data file, that is, the label name, is read out and displayed in a window on the screen, and the key operation is performed from the displayed multiple label names. Can also be selected. By specifying the label name, the CPU 11 can know the channel number corresponding to the label name from the header portion of the data file.

After the execution of step S84, the CPU 11 reads the recording start time, the final data counter value and the sampling cycle included in the header part of the read data file (step S85), and calculates the display data cycle from the final data counter value. (Step S86). That is, the final data counter value indicates the number of data of each channel of the read data file, and the number of dots that can be displayed on the side of the display 19 is known in advance, and thus can be obtained by the calculation of final data counter value / dot number. The nearest integer less than or equal to the value is the display data cycle. For example, if the final data counter value is 10,000 and the number of dots is 512, then 10000/512 = 19.53, so the display data cycle is 19. In this case, 1
One data is displayed for every nine data.

Next, the CPU 11 sets the variable C to 1 (step S87), reads the measurement data of each channel corresponding to the data counter value C of the read data file (step S88), and then the data counter value C Is multiplied by the sampling period, and the recording start time is added to it to obtain the calculation result as time data (step S
89). The data read in step S88 is only the channel corresponding to the label name determined in step S84. The read measurement data and the calculated time data are supplied to the display control circuit 18 (step S9).
0). Then, the display data cycle calculated in step S86 is added to the variable C to make it a new variable C (step S91), and it is determined whether or not the variable C exceeds the final data counter value (step S92). If the variable C does not exceed the final data counter value, step S8
Returning to step 8, the above operation is repeated. If the variable C exceeds the final data counter value, the measured data to be displayed has been read from the data file. Display control circuit 1
8 displays a time chart image on the screen of the display 19, for example, as shown in FIG. 21, based on the supplied measurement data and time data. That is, every time the measurement data and the time data are supplied, the coordinate points are set as the time data in the X-axis direction and the measurement data in the Y-axis direction, and the coordinate points are connected by a straight line for each same parameter. The time data is displayed along the X-axis as scale values for 7 points at predetermined equal intervals. The unit in the Y-axis direction corresponds to the unit of any one parameter, and it can be arbitrarily switched. In the case of FIG. 21, the engine speed is selected as can be seen from the fact that “NE” is surrounded by a frame in the “Ch” column at the top of the time chart image.

In the above embodiment, the electronic fuel injection device is used as the electronic control device.
The present invention is not limited to this. The present invention can be applied to electronic control devices such as an ignition timing control device, an air-fuel ratio control device, and a throttle opening control device. Further, in the above-mentioned embodiment, the measurement data is taken out from the ECU by serial communication, but it is not limited to this, and it is clear that parallel communication may be used.

[0032]

In the data analysis device for the electronic control device for a vehicle of the present invention, environmental data including a conversion formula for converting actual data into physical values for each of a plurality of parameters is stored in advance, and at least the electronic control device stores the environmental data. Since the actual data of one parameter is sequentially obtained and stored, and the stored actual data is converted into a physical value according to the conversion formula in the environmental data and displayed in correspondence with the parameter name, the electronic controller is under control. The change state of each parameter obtained in 1 is displayed as a physical value. Therefore, a physical value that can be easily understood by an operator such as a tester can be obtained, which enables efficient data analysis.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a schematic configuration of a control circuit.

FIG. 3 is a block diagram showing a configuration of an interface circuit.

FIG. 4 is a block diagram showing a configuration of an ECU.

FIG. 5 is a flowchart showing the operation of the CPU of the control circuit.

FIG. 6 is an example of a monitor image display.

FIG. 7 is a diagram partially showing details of the monitor image display of FIG.

FIG. 8 is a diagram showing a structure of a RAM address file.

FIG. 9 is a diagram showing a structure of an LSB file.

FIG. 10 is a diagram showing a data table of a reception channel storage area.

FIG. 11 is a diagram showing a data table of a data storage area.

FIG. 12 is a flowchart showing the operation of the CPU of the monitor circuit.

FIG. 13 is a flowchart showing the operation of the CPU of the control circuit.

FIG. 14 is a diagram showing a data table of a received data recording area.

FIG. 15 is a flowchart showing the operation of the CPU of the monitor circuit.

FIG. 16 is a flowchart showing the operation of the CPU of the control circuit.

FIG. 17 is a diagram showing a data table of a latest data storage area.

FIG. 18 is a diagram showing a data table of a result data storage area.

FIG. 19 is a diagram showing a graph display example.

FIG. 20 is a flowchart showing a time chart display operation of the CPU of the control circuit.

FIG. 21 is a diagram showing a time chart video display example.

[Explanation of symbols for main parts]

 1 Control circuit 2 Interface circuit 3 ECU 4 Monitor circuit 5 Analog circuit 6 Bus connection circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Umeda 1-4-1 Chuo, Wako-shi, Saitama Honda R & D Co., Ltd. (72) Inventor Takatoshi Ota 1-4-1 Chuo, Wako-shi, Saitama Inside Honda R & D Co., Ltd.

Claims (5)

[Claims] 1. A data analysis device for analyzing actual data of detection or control parameters obtained during control in an electronic control device for controlling an internal combustion engine mounted on a vehicle, wherein the actual data is physically recorded for each of a plurality of parameters. Environmental data storage means for storing beforehand environmental data including conversion formulas for converting into values, actual data storage means for sequentially obtaining and storing actual data of at least one parameter from the electronic control device, and the actual data storage means Control means for converting the actual data obtained from the physical data according to the conversion formula in the environmental data obtained from the environmental data storage means, and displaying the physical value converted by the control means in association with the parameter name And a data analysis device for an electronic control unit for a vehicle. 2. The electronic control unit is provided with an internal memory that holds actual data of parameters at different addresses for each of a plurality of parameters obtained during control, and the actual data storage means is provided with the plurality of parameters. 2. The data analysis device for an electronic control unit for a vehicle according to claim 1, wherein actual data is read from each address of the internal memory in a predetermined order and stored for each parameter. 3. The data analysis apparatus for a vehicle electronic control device according to claim 1, wherein an actual data read operation is performed by serial communication between the electronic control device and the storage means. 4. The environment data storage stage includes address data indicating a correspondence relationship between an address of the internal memory and a parameter, and the control means indicates to the storage means an address to be read according to the address data. The data analysis device for an electronic control unit for a vehicle according to claim 2, wherein 5. The storage means for reading the latest actual data stored in the storage means and storing it in order for each parameter, and the latest actual data stored in the storage area as parameters. The data analysis of the vehicle electronic control unit according to claim 1, further comprising: a conversion unit that reads out each of the data and converts it into a physical value according to a conversion formula in the environment data obtained from the environment data storage unit. apparatus.