JP3645653B2 - Data analysis device for vehicle electronic control unit - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a data analysis apparatus that reads actual data indicating an operating state of an electronic control device for a vehicle such as an electronic fuel injection device mounted on an automobile and displays it.
[0002]
[Prior art]
An electronic control device for a vehicle is for controlling the operating state of an on-vehicle internal combustion engine to an optimal state. For example, in an internal combustion engine that supplies fuel using injection, the amount of fuel to be supplied is determined by the vehicle and the engine. 2. Description of the Related Art An electronic fuel injection apparatus that detects an operating state with a sensor and calculates and controls the operating state according to the sensor detection value is well known.
[0003]
In order to determine the control operation state of such an electronic control device, for example, whether the sensor or the control device main body is operating normally, the electronic control device is actually mounted on the vehicle and the engine is operated, Tests are being carried out by running. In the test, each sensor output value or calculated value was taken out from the electronic control device as data, stored in a memory, and analyzed.
[0004]
[Problems to be solved by the invention]
However, since these sensor output values and calculated values are actual values in control, they are values that cannot be obtained as physical values that can be easily understood by a tester or the like unless converted by some conversion formula. Therefore, there is a problem that the tester cannot know the actual physical value unless the accumulated data is calculated and analyzed separately using a computer or the like, which is inconvenient and efficient data analysis is difficult.
[0005]
Accordingly, an object of the present invention is to provide a data analysis device that enables efficient data analysis on actual data obtained during the control operation of the vehicle electronic control device.
[0006]
[Means for Solving the Problems]
A data analysis device for a vehicle electronic control device according to the present invention is a data analysis device that analyzes actual data of detection or control parameters obtained during control in an electronic control device that controls an internal combustion engine mounted on a vehicle, For each of a plurality of detection or control parameters, a conversion formula identifier for identifying a conversion formula for converting actual data into a physical value and a physical conversion parameter used when converting the real data into a physical value are stored in association with each other, In addition, the conversion formula identifier and the conversion formula identified by the conversion formula identifier are stored in association with each other. At least one of environmental data storage means and an electronic control unit Detection or control Actual data storage means for sequentially obtaining and storing actual parameter data, and actual data obtained from the actual data storage means The conversion formula identifier of the conversion formula to be applied to is specified, the physical conversion parameter and the conversion formula associated with the specified conversion formula identifier are read out from the environment data storage means, and according to the read physical conversion parameter and the conversion formula Actual data Control means for converting into a physical value, and means for displaying the physical value converted by the control means in correspondence with the parameter name are characterized.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described 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. An ECU (electronic control unit) 3 of an electronic control device is connected to the interface circuit 2 as will be described later. The control circuit 1 comprises a microcomputer and has a built-in display. As the control circuit 1, for example, a notebook personal computer can be used. However, for ease of explanation, a schematic configuration of the control circuit 1 is shown in FIG. 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 performs display control of the display 19 in accordance with a command from the CPU 11. A keyboard 20 is connected to the internal bus 14 via an operation control circuit 20a. The keyboard 20 is provided with at least alphabetic character keys and numeric keys in addition to function keys, enter keys, arrow keys, and ESC (escape) keys described later.
[0008]
The interface circuit 2 is basically for relaying measurement data (actual data) supplied from the ECU 3 to the control circuit 1 based on a command from the control circuit 1, and includes a monitor circuit 4, an analog circuit 5, and a bus. A connection circuit 6 is provided.
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. The input / output circuit 24 has a serial communication port in accordance with a standard such as RS-232C, to which not only the ECU 3 but also the temperature measurement 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. The RAM 23 stores data necessary for the control operation of the CPU 21, for example, a connection state or the like in a current serial communication port. The DP-RAM 25 has two ports for input / output, and is used for temporarily storing data supplied from the ECU 3 or commands supplied from the control circuit 1. 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.
[0009]
In the analog circuit 5, as shown in FIG. 3, like the monitor circuit 4, the CPU 31, ROM 32, 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). They are connected to an external voltage output type sensor or a voltage driven output device such as a pen recorder (both not shown) via an analog signal port.
[0010]
The bus connection circuit 6 is for mechanically and electrically connecting the inputs and outputs of the DP-RAM 25 of the monitor circuit 4 and the DP-RAM 35 of the analog circuit 5 to the external bus 16 of the control circuit 1.
As shown in FIG. 4, the ECU 3 connected to the data analysis apparatus having such a configuration includes at least a CPU 51, 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. They 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. The sensor includes an oxygen concentration sensor that generates an output voltage corresponding to the oxygen concentration in the exhaust gas in the internal combustion engine exhaust pipe, an intake pipe internal pressure sensor that generates a voltage corresponding to the absolute pressure in the intake pipe of the internal combustion engine, and the internal combustion engine There are various sensors such as a crank angle sensor that generates a pulse signal corresponding to the number of rotations of the crankshaft, and a cooling water temperature sensor that detects the temperature of cooling water in the internal combustion engine.
[0011]
The CPU 51 of the ECU 3 operates in accordance with a program stored in advance in the ROM 52, reads the output values of the plurality of sensors through the sensor input interface circuit 55, stores them in the RAM 53, and drives the actuator according to the output values of these sensors. A signal is generated and supplied to the drive circuit 56. For example, when the injector is driven, the basic fuel injection amount is calculated from the absolute value in the intake pipe 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 by 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. As described above, the ECU 3 sequentially obtains values such as reading values of various sensors, intermediate values such as the basic fuel injection amount, and driving values such as the fuel injection amount as time passes. Each value is written and updated at a predetermined address in the RAM 53 as actual data. The data analysis apparatus reads each data in the RAM 53 and analyzes the data. Therefore, at the time of 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.
[0012]
The operation when the power is supplied to the data analysis apparatus in a state where the ECU 3 is connected to the data analysis apparatus will be described. Naturally, it is assumed that the ECU 3 is mounted on a vehicle and performs a control operation.
As shown in FIG. 5, the CPU 11 of the control circuit 1 first causes the display control circuit 18 to display the monitor video (step S1). FIG. 6 shows a monitor image, each of which is surrounded by 16 frames is a channel window for displaying parameter values obtained by the ECU 3. FIG. 7 specifically shows the contents of each display area in the channel window. In FIG. 7, “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 number in the channel window is, 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”, the engine speed, if “TA”, the engine intake temperature, if “PBA”, “intake pipe absolute pressure”. “Monitor display value” is a hexadecimal actual data value display of the parameter indicated by the label name, and “hex” next to it indicates that it is a hexadecimal number. The “physical value display” is a decimal number display using the unit to indicate the parameter value displayed by the label name, 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.
[0013]
6 is a guide display of ten function keys f · 1 to f · 10 (not shown) provided on the keyboard 20 of the control circuit 1. “Setting” on the left side of the screen corresponds to the function key f · 1, and then corresponds to the function key numbers in the display order on the right.
The CPU 11 determines whether or not the function key f · 9 corresponding to “environment” is operated in the display state of the monitor video (step S2). If the function key f.9 is operated, the environment setting mode is set, and the display control circuit 18 displays the selected video of the RAM address file on the monitor video on 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, the label name for each parameter, the description of the label name, the address of the internal RAM 53 of the ECU 3, the data size W / B And a file in which the LSB code is 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 displayed in a window on the display screen, and one RAM address file name among the plurality of RAM address file names is provided on the keyboard 20 of the control circuit 1. It is highlighted when the cursor is operated with the key. After a desired RAM address file name is selected, the selection is determined by operating the enter key. After executing step S3, the CPU 11 determines whether or not the RAM 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 video of the RAM address file is terminated (step S6).
[0014]
The data size W / B in the RAM address file indicates whether the data is word data (2-byte data) or 1-byte data. The LSB code is a code for specifying LSB data in the LSB file. The LSB file has a file structure as shown in FIG. That is, the LSB code includes a code number, a label name, a physical quantity unit, a formula number, a data length, physical conversion parameters f0, f1,... Are LSB data corresponding to one measurement parameter. LSB data is continuously formed 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 a physical value from the actual value of the measurement parameter, and the physical conversion parameters f0, f1,... Are used in the conversion formula. Coefficients.
[0015]
After executing step S6, the CPU 11 of the control circuit 1 returns to step S2. If the function key f · 9 is not operated in step S2, it is determined whether or not the function key f · 1 corresponding to “setting” is operated (step S7). If function key f.1 is operated, a channel setting operation is performed (step S8). That is, in the channel setting, one of the plurality of channel display frames shown on the screen of the display 19 as the monitor image is a thick line frame, which becomes the current cursor position, and is operated by operating the arrow keys. The cursor position can be moved. When the enter key is operated after using the arrow keys to move the cursor to the desired channel display frame, the label names contained in the selected RAM address file are displayed continuously in the window, and the desired label names are displayed using the arrow keys. After moving the position, the selection is made by operating the enter key. As a result, the correspondence between the channel number and the parameter to be measured is determined, and a reception channel storage area indicating 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 way, for example, a reception channel storage area as shown in FIG. 10 is formed.
[0016]
The CPU 11 determines whether or not the ESC key is operated every time the channel setting operation is performed (step S9). If the ESC key has not been operated, step S8 is repeated for further channel setting operation. On the other hand, if the ESC key is operated, the control circuit 1 writes the correspondence between each channel number stored in the channel storage area and the RAM address in the ECU 3 in the DP-RAM 25 (step S10). For example, a data storage area is formed in the DP-RAM 25 as shown in FIG. When the control circuit 1 finishes writing the correspondence relationship in the DP-RAM 25, it issues an interrupt signal indicating a start command for starting data communication (step S11). This interrupt signal is written as data in the DP-RAM 25.
[0017]
On the other hand, as shown in FIG. 12, the CPU 21 of the monitor circuit 4 determines whether or not a start command interrupt signal has been written in the DP-RAM 25 at a predetermined timing (step S51). When the interrupt signal for the start command is written, the CPU 21 starts serial communication between the monitor circuit 4 and the ECU 3. That is, the CPU 21 sets the channel number n to 1 (step S52), reads the address corresponding to the n-th channel n-ch from the data table of the DP-RAM 25 (step S53), and outputs a serial signal for data request for the read address. Transmission is performed via the input / output circuit 24 (step S54).
[0018]
When the 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 stores it in the storage location specified by the read address of the RAM 53. The data value is read and supplied to the serial communication input / output circuit 54. As described above, the value stored in the storage position designated by the address is a value detected by the sensor or a calculated value such as the fuel injection amount. The serial communication input / output circuit 54 transmits as a serial signal indicating the data value.
[0019]
After executing step S54, the CPU 21 of the monitor circuit 4 determines whether or not a serial signal is supplied from the serial communication input / output circuit 54 of the ECU 3 (step S55). If the serial signal is supplied, the value indicated by the serial signal is read and written in the storage location corresponding to the channel number n-ch in the DP-RAM 25 (step S56). The CPU 21 further adds 1 to the channel number n (step S57), and the new channel number n becomes the maximum channel number n. _max It is determined whether or not (for example, 48) (step S58). n ≦ n _max In this case, the process returns to step S53 and the above operation is repeated for the next channel number. n> n _max In this case, the process returns to step S52 and the above operation is repeated for the first channel 1-ch.
[0020]
By performing such a serial communication operation, data values (hexadecimal data) read from the RAM 53 are written in the reading order in the DP-RAM 25 for each channel. The write position of the DP-RAM 25 is incremented for each channel by a counter (not shown), and when the last writable storage position is reached, the counter is reset and the next write position returns to the first storage position. It is like that.
[0021]
When such a 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 location 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 determines whether or not the function key f · 6 corresponding to “log” has been operated (step S21). If the function key f.6 is operated, the data storage mode is set, and the time data at the time when the operation of the function key f.6 is detected is detected from a time counter (not shown) held in the control circuit 1 itself. Read and write to the header portion of the received data storage area (step S22). This time data indicates the data recording start time. The CPU 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 correspondence with the channel. (Step S24) The data counter provided at the beginning 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 speed 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 to the area. The data counter indicates the number of read data common to all channels. In the DP-RAM 25, the storage position of the data read by the CPU 11 is marked for each channel by a counter (not shown) so that new data can be written. The received data storage area is, for example, as shown in FIG.
[0022]
When the CPU 11 finishes writing data to 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 generation of an interrupt signal from the CPU 21 of the next monitor circuit 4 is awaited. On the other hand, if the function key f7 is operated, an interrupt signal indicating a stop command for stopping 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.
[0023]
An interrupt signal indicating this stop command is written as data in the DP-RAM 25. Therefore, as shown in FIG. 15, the CPU 21 of the monitor circuit 4 determines whether or not a stop command interrupt signal is written in the DP-RAM 25 at a predetermined timing (step S61). If the stop command interrupt is written, the CPU 21 controls the input / output circuit 24 to stop the serial communication between the monitor circuit 4 and the ECU 3 (step S62).
[0024]
After executing step S27, the CPU 11 of the control circuit 1 determines whether or not the function key f · 8 corresponding to “save” has been operated (step S28). When the function key f · 8 is operated, the contents of the received data storage area of the RAM 12 are stored as a data file in the hard disk drive 17 (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 received data storage area of the RAM 12 are maintained as they are.
[0025]
The CPU 11 of the control circuit 1 performs a screen display operation as a background process of the serial communication operation described above. In this screen display operation, the latest measurement data (hexadecimal data) of each channel is read from the data table of the DP-RAM 25 as shown in FIG. 16, and each channel is stored in the latest data storage area as shown in FIG. Each time writing is performed (step S31), the channel number m is set to 1 (step S32), the LSB code corresponding to the m-th channel m-ch is read from the channel storage area of the RAM 12 (step S33), and designated by the LSB code. The contents of the LSB file are read (step S34). Since data such as a physical quantity unit, a formula number, a data length, a physical conversion parameter, and the like are obtained from the LSB file, the conversion formula specified by the formula number is read from the ROM 13 and the physical conversion parameter and the m- The physical value is calculated by applying the latest data of ch (step S35). The CPU 11 writes the physical value of the calculation result in the result data storage area in the RAM 12 as shown in FIG. 18 in correspondence with the m-th channel m-ch (step S36), and adds 1 to the channel number m (step S37). ), The new channel number m is the maximum channel number n _max It is determined whether or not it is larger (step S38). m ≦ n _max In this case, the process returns to step S32 and the above operation is repeated for the next channel number. m> n _max In this case, a display command is issued to the display control circuit 18 (step S39).
[0026]
This display command is issued according to the physical quantity unit of the latest data storage area, result data storage area, and LSB file. The display control circuit 18 displays the latest data for each channel obtained from the latest data storage area on the monitor video screen displayed on the display 19 in the monitor display value range shown in FIG. 7 in the display window of the corresponding channel. The physical value of the calculation result for each channel obtained from the data storage area is displayed in the physical value display area shown in FIG. 7 in the corresponding channel display window, and the physical quantity unit of the LSB file for each channel is displayed for the corresponding channel. Displayed in the physical value unit display area shown in FIG. 7 in the display window.
[0027]
Instead of displaying the physical value numerically, it is also possible to display a graph as shown in FIG. 19 by operating the function key f · 3 corresponding to “graph” on the monitor video screen.
The CPU 11 of the control circuit 1 determines whether or not the function key f · 10 corresponding to “END” has been operated (step S30). When the function key f · 10 is operated, this routine is terminated. As described above, data of a plurality of channels is acquired from the ECU 3 and stored in the received data storage area of the RAM 12 or the hard disk drive 17, so that the operation shifts to an operation for analyzing and displaying these data.
[0028]
Therefore, an operation for analyzing and displaying the measured actual data on the display 19 will be described. In the analysis display operation, the CPU 11 of the control circuit 1 first instructs the display control circuit 18 to display the time chart basic video as shown in FIG. 20 (step S81). The time chart basic video is predetermined as data in the display control circuit 18, and the time chart basic video is not subjected to data analysis display, and only a pull-down menu is displayed at the top. Next, a data file having measurement data to be displayed is determined (step S82). 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). If the designated data file is not yet stored in the received data storage area of the RAM 12 in the hard disk drive 17, it is read from the RAM 12. And the label name regarding the measurement data which should display data is determined from the label names contained in the read data file (step S84). This is also done by reading the selection result because the user selects a label name from the pull-down menu on the screen by key operation. Alternatively, the measurement parameter assigned to each channel included in the header of the read data file, that is, the label name is read out and displayed on the screen as a window, and key operations are performed from among the displayed label names. Can also be selected. The CPU 11 can know the channel number corresponding to the label name from the header portion of the data file.
[0029]
After executing step S84, the CPU 11 reads the recording start time, final data counter value, and sampling period included in the header of the read data file (step S85), and calculates the display data period 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 since the number of dots that can be displayed on the side of the display 19 is known in advance, it can be obtained by calculating the 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, 10000/512 = 19.53, so the display data cycle is 19. In this case, 1 data is displayed for every 19 data.
[0030]
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 sets the data counter value C to the sampling period. Is added to the recording start time, and the calculation result is used as time data (step S89). The data read in step S88 is only the channel corresponding to the label name defined in step S84. The read measurement data and calculated time data are supplied to the display control circuit 18 (step S90). Then, the display data cycle calculated in step S86 is added to the variable C to obtain a new variable C (step S91), and it is determined whether or not the variable C has exceeded the final data counter value (step S92). If the variable C does not exceed the final data counter value, the process returns to step S88 and the above operation is repeated. If the variable C exceeds the final data counter value, the measurement data to be displayed is read from the data file. The display control circuit 18 displays a time chart video as shown in FIG. 21, for example, on the screen of the display 19 based on the supplied measurement data and time data. That is, every time measurement data and time data are supplied, coordinate points are taken as time data in the X-axis direction and 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 a scale value at only seven points at predetermined equal intervals. The unit in the Y-axis direction corresponds to any one parameter unit, and can be switched arbitrarily. In the case of FIG. 21, the engine speed is selected as can be understood from the fact that “NE” is surrounded by a frame in the “Ch” column at the top of the time chart video.
[0031]
In the above-described embodiment, an example in which an electronic fuel injection device is used as the electronic control device has been described. However, 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.
In the above-described embodiment, the measurement data is extracted from the ECU by serial communication. However, the present invention is not limited to this, and it is obvious that parallel communication may be used.
[0032]
【The invention's effect】
In the data analysis device of the vehicle electronic control device of the present invention, A conversion formula identifier and a physical conversion parameter used when converting actual data into a physical value are stored in association with each other, and a conversion formula identifier and a conversion formula identified by the conversion formula identifier are stored in association with each other. And At least one from the electronic control unit Detection or control Obtain actual parameter data sequentially , Physical conversion parameters and conversion formulas corresponding to the detection or control parameters In response to the The actual data Converted to physical values Detection or control Displayed in correspondence with the parameter name, so that each obtained during control of the electronic control unit Detection or control The change state of the parameter is displayed as a physical value. Therefore, since a physical value that is easy to understand for an operator such as a tester can be obtained, efficient data analysis is possible.
[Brief description of the 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 illustrating 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 a monitor image display example.
7 is a diagram partially showing details of the monitor video display of FIG. 6;
FIG. 8 is a diagram illustrating a structure of a RAM address file.
FIG. 9 is a diagram illustrating 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 in 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 in the latest data storage area.
FIG. 18 is a diagram showing a data table in a result data storage area.
FIG. 19 is a diagram illustrating 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 main part codes]
1 Control circuit
2 Interface circuit
3 ECU
4 Monitor circuit
5 Analog circuit
6 Bus connection circuit

Claims (5)

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,
For each of a plurality of detection or control parameters, a conversion formula identifier for identifying a conversion formula for converting actual data into a physical value and a physical conversion parameter used when converting the real data into a physical value are stored in association with each other, And environmental data storage means for storing the conversion formula identifier and the conversion formula identified by the conversion formula identifier in association with each other ,
Real data storage means for sequentially obtaining and storing real data of at least one detection or control parameter from the electronic control unit;
A conversion formula identifier of a conversion formula to be applied to actual data obtained from the actual data storage means is specified, and physical conversion parameters and conversion formulas associated with the specified conversion formula identifier are read from the environmental data storage means. Control means for converting actual data into physical values in accordance with the read physical conversion parameters and conversion formula ;
And a means for displaying the physical value converted by the control means in correspondence with the parameter name. The electronic control device is provided with an internal memory that holds actual data at different addresses for each of the plurality of detection or control parameters obtained during control, and the actual data storage means includes the plurality of detection or control parameters. 2. The data analysis device for a vehicle electronic control device according to claim 1, wherein actual data is read from each address of the internal memory in a predetermined order and stored for each detection or control parameter.   2. The data analysis apparatus for an electronic control unit for a vehicle according to claim 1, wherein an operation for reading actual data is performed by serial communication between the electronic control unit and the storage unit. The environmental data storage stage includes address data indicating a correspondence relationship between the address of the internal memory and the detection or control parameter, and the control means instructs the storage means to read an address according to the address data. The data analysis device for a vehicle electronic control device according to claim 2. The control means reads the latest actual data stored in the storage means and stores it in order for each of the detection or control parameters, and the latest actual data stored in the storage area is detected. The vehicle according to claim 1, further comprising: a conversion unit that reads out each control parameter and converts it into a physical value in accordance with a physical conversion parameter and a conversion formula in the environmental data obtained from the environmental data storage unit. Data analysis equipment for electronic control equipment.

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