JPH11324780A - Data analyzing device of electronic control device for engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take in data on operation parameter and control data from a control device in favorable timing and to analyze the same without changing the communication speed by providing an ECU data taking means for operation parameters and a sensor data taking means. SOLUTION: ECU data stored in RAM of an interface circuit 50, measuring unit data and sensor data are read out in designated timing fixed by a control circuit 4, for example, at every 100 msec. to be stored in the RAM of the control circuit 4. In the control circuit 4, according to the stored ECU data, the measuring unit data and sensor data, the processing for converting the rotating speed, the cooling water temperature or the like to physical values, the screen display of physical values on a display device 6 and the analysis processing for the screen display of a time chart according to the physical values or failure discrimination and display are conducted. ECU data and sensor data are taken. Thus, it is possible to discriminate a failure of a sensor and ECU in addition to analysis of an engine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus for analyzing the operation of an electronic control unit for an engine.

[0002]

2. Description of the Related Art An electronic control unit for an engine is used to control the operating state of the engine to an optimum state. For example, in an engine that supplies fuel by injection, the amount of fuel to be supplied is determined by the amount of vehicle running. 2. Description of the Related Art An electronic fuel injection device that detects a state and an operation state of an engine by a sensor, performs an operation based on a sensor detection value, and controls a fuel supply amount in accordance with the operation result is well known.

[0003] The control operation state of such an electronic control device,
For example, tests are performed by actually connecting the electronic control unit to the engine to operate the engine or running the vehicle to determine whether the sensors and the control device main body are operating normally. I have. In this test, the operation of the electronic control unit is analyzed by taking in the sampled values and calculated values of the sensor outputs updated and held in the memory of the electronic control unit as ECU data. Since the ECU data is fetched through the communication means between the data analysis device of the electronic control device and the electronic control device, the data fetch cycle should be shorter than the data transfer time. There is a restriction that you can not. Therefore, in order to increase the accuracy of data analysis, it is necessary to increase the data transfer rate. To achieve this, not only the communication circuit on the data analysis device but also the communication circuit on the electronic control device can perform high-speed communication. It has to be changed to a possible one, resulting in a disadvantage of high cost.

[0004]

In the data analysis device of the conventional electronic control unit, there is a limitation on the speed of taking in the ECU data as described above. However, the electronic control unit samples the sensor output at high speed,
Since the update of the operation parameter data and the control data in the electronic control unit is performed at high speed, it is not possible to match with the acquisition of the ECU data.

[0005] In view of the above circumstances, the present invention does not change the communication speed of the communication means between the data analysis device and the electronic control device, and converts appropriate types of operation parameter data and control data. An object of the present invention is to provide a data analysis device of an electronic control device that can be fetched from an electronic control device and analyzed at a preferable timing.

[0006]

A data analysis device for an electronic control unit for an engine according to the present invention takes in and stores ECU data in an electronic control unit for controlling an engine during operation of the engine, and stores the stored ECU data. A data analysis device of an electronic control unit for an engine that performs an analysis operation based on a pulse detection unit that detects a crank pulse emitted from a crank pulse generation unit of the engine, and a pulse detection unit that synchronizes with a pulse detection of the pulse detection unit. ECU data fetching means for fetching the ECU data from the electronic control device, ECU data storage means for storing the fetched ECU data, and an analog signal emitted from a sensor provided in the engine in synchronization with the pulse detection. Data acquisition that captures the sample value of the sensor as sensor data And a sensor data storage means for storing the sensor data, and an analysis means for reading the ECU data and the sensor data from the ECU data storage means and the sensor data storage means and performing an analysis operation. And

That is, according to the feature of the present invention, since there are provided ECU data taking-in means for taking in ECU data of operation parameters and sensor data taking-in means taking in sensor data, based on the ECU data and the sensor data, It becomes possible to analyze the electronic control unit for the engine and the operating state of the engine. According to another feature of the present invention, the ECU data is stored in the first memory in response to the pulse detection, and the ECU data stored in the first memory is read out in response to the pulse detection. It is possible to take in the ECU from the electronic control unit.

Further, according to another feature of the present invention, the sensor data is stored in the second memory in response to the pulse detection,
Since the sensor data stored in the memory is read in response to the pulse detection, it is possible to take in the sensor data from a sensor provided in the engine at a preferable timing. Still further, according to another feature of the present invention, the ECU data and the sensor data stored in the third memory are read and analyzed. It is possible to analyze the sensors provided in the.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a block diagram of a data analysis device of the engine electronic control device. An internal sensor group 11 provided in an engine (not shown) is connected to an electronic control unit (hereinafter, referred to as an ECU) 21. A drive output terminal of the ECU 21 is also connected to an actuator group 13 such as a fuel injector.
An external sensor group 12 such as a temperature sensor provided at an appropriate position of a vehicle (not shown) is connected to a measurement unit group 22 such as a temperature measurement unit provided independently of the ECU and is connected to an external device. The output of the sensor group 12 is connected to a sensor output capturing circuit 80 via an amplifier circuit group 61 and a connector group 71. Here, the internal sensor refers to a sensor that detects engine parameters such as engine speed and intake negative pressure, and the external sensor refers to a sensor that detects parameters other than engine operation itself, such as a temperature sensor. , For convenience of explanation. The data output terminals of the ECU 21 and the measurement unit group 22 are connected to the communication circuit 40 via the connector group 31. The outputs of the internal sensor group 11 and the external sensor group 12 are connected to a sensor output capturing circuit 80 via an amplifier circuit group 61 and a connector group 71. Further, the crank angle sensor 1 for generating the angular position signal of the crankshaft of the engine is connected to the communication circuit 40 and the CPU of the sensor output capturing circuit 80 through the waveform shaping circuit 2 and the connector 32 or 72 as described later. It is connected to end INT. The communication circuit 40 and the sensor output capturing circuit 80
Are connected to the interface circuit 50. The interface circuit 50 has a communication port (not shown) conforming to a standard such as a SCSI interface, and is connected via this port to the control circuit 4 configured by, for example, a battery-powered personal computer. ing. The control circuit 4 includes a display 6 and a printing device 7.
Is connected. The communication circuit 40, the sensor output acquisition circuit 80, the interface circuit 50, and the control circuit 4 constitute the data analysis device 5 of the engine electronic control device.

FIG. 2 shows a detailed block diagram of the communication circuit 40. The output of the crank angle sensor 1 is supplied to the interrupt signal input terminal INT of the CPU 41 of the communication circuit 40 via the connector 32. Outputs of the ECU 21 and the measurement unit group 22 are supplied to the input / output interface 43 via the connector 31. Here, the measurement unit group 22
Each of the individual measurement units appropriately adjusts the output from the sensor to be measured to form a desired form of sensor signal as control information. The input / output interface 43 includes, for example, a port (not shown) for serial communication according to the RS-232C standard. The input / output interface 43 emits a signal from the CPU 41 to the ECU 21 and the measurement unit group 22. In response to the given data request command, ECU data received from the ECU 21 and measurement unit data supplied from the measurement unit 22 are received. The above-described ECU data is data such as a sample value obtained by sampling an internal sensor signal in the ECU 21, an intermediate value such as a basic fuel injection amount obtained based on the sample value, and a control value for controlling an actuator. The measurement unit data is a sample value obtained by sampling the external sensor signal in the measurement unit 22. Also, the RAM in the ECU 21
(Not shown) stores the latest values of the sample value, the intermediate value, and the control value as described above. The output interface 43 is connected to the bus 42 and supplies the received ECU data and measurement unit data to the input / output bus 42. The input / output bus 42 inputs and outputs a data signal or an address signal to and from the CPU 41. Also,
Inside the CPU 41, a data fetching process according to a flowchart described later is performed.

Further, the input / output bus 42 has an RO
M44, RAM45, dual port RAM (hereinafter, D
P-RAM) 46 and interface circuit 5
0 is connected. The DP-RAM 46 has 2
One port is provided for temporarily storing ECU data and measurement unit data. ROM
Reference numeral 44 stores a program for executing a data capturing process according to the flowchart described in FIG.

[0012] The ECU data fetched from the ECU 21 and the measurement unit data fetched from the measurement unit 22 are stored in the DP-RAM 46. This DP-RAM
46 is also connected to an interface circuit 50 described later. FIG. 3 shows a detailed block diagram of the sensor output capture circuit 80. As described above, the output of the crank angle sensor 1 is supplied to the sensor output capturing circuit 80 via the connector 72.
To the interrupt signal input terminal INT of the CPU 81. The outputs of the internal sensor group 11 and the external sensor group 12 are
A multiplexer (hereinafter referred to as MPX) through a connector group 71
83), and the output of the MPX 83 is A / D
It is supplied to a converter 84. The MPX 83 is a switch that selectively supplies any one of the signals issued from the internal sensor group 11 to the A / D converter 84 in accordance with a command issued from the CPU 81 at a predetermined timing.

The A / D converter 84 is connected to a CPU 81 via an input / output bus 82. The input / output bus 82 inputs and outputs a data signal or an address signal to / from the CPU 81. Further, inside the CPU 81, data is taken in according to a flowchart described later. Further, a ROM 85, a RAM 86, a DP-RAM 87, and an interface circuit 50 are connected to the input / output bus 82 described above. ROM85
Stores a program for executing a data fetching process according to the flowchart described in FIG.

The sensor data fetched from the internal sensor group 11 is stored in the DP-RAM 87. This D
The P-RAM 87 is also connected to the interface circuit 50. FIG. 4 shows a detailed block diagram of the interface circuit 50. I / O bus 42 of communication circuit 40
Are connected to the input / output bus 52 via a bus interface circuit 53. Further, the DP-
The input / output port of the RAM 46 is also connected to the input / output bus 52. With the above-described configuration, the CPU 41 of the communication circuit 40 outputs a read request command indicating completion of data capture in the communication circuit 40 to the interface circuit 50, and the CPU 41 of the interface circuit 50 that has received the read request command. The CPU 51 can read the ECU data and the measurement unit data stored in the DP-RAM 46 of the communication circuit 40.

The input / output bus 82 of the sensor output take-in circuit 80 is also connected to the input / output bus 52 via the bus interface circuit 54.
The input / output port of the P-RAM 87 is also connected to the input / output bus 52. In the sensor output capture circuit 80, when the data capture is completed, the interface circuit 50
Can read the sensor data stored in the DP-RAM 87.

The input / output bus 52 is used to input / output data signals or address signals to / from the CPU 51. The input / output bus 52 includes a ROM 55, a RAM 5
6 and the control circuit 4 are connected. DP-RAM46
And ECU data read from the DP-RAM 87,
The measurement unit data and sensor data are transferred to the input / output bus 5
2 and stored in the RAM 56. The control circuit 4
The ECU data, the measurement unit data, and the sensor data stored in the RAM 56 are read out and read from the RAM of the control circuit 4.
(Not shown).

The above-described crank angle sensor 1 and waveform shaping circuit 2 constitute crank pulse generating means.
PU41 and 81 constitute pulse detection means,
The CPU 41, the input / output bus 42, the input / output interface 43, the ROM 44, the RAM 45, and the DP-RAM 46 constitute ECU data capturing means and ECU data storage means.
83, A / D converter 84, ROM 85, RAM 86
The DP-RAM 87 constitutes a sensor data acquisition unit and a sensor data storage unit. Further, a relay unit is configured by the interface circuit 50,
The control circuit 4 constitutes control means, and the interface circuit 50 and the control circuit 4 constitute analysis means.

In the following description of FIGS. 5 and 6, in the state where the sensor, the ECU, and the measurement unit are connected to the data analyzer as described above, the power is supplied to the data analyzer 5 and the control circuit 4, Interface circuit 5
0, each CP of the communication circuit 40 and the sensor output capturing circuit 80
Data acquisition such as initialization of variables used in U, initialization of communication conditions such as communication speed in the communication circuit 40, and initialization of input conditions such as an input range of the A / D converter in the sensor output acquisition circuit 80. It is assumed that all the initial settings have been completed. The ECU 21 is mounted on the engine and performs a control operation.

FIG. 5 is a flowchart of a subroutine for processing data fetch in the communication circuit 40. First, it is determined whether a crank pulse is issued from the crank angle sensor 1 (step S101). If no crank pulse has been issued, this subroutine is immediately terminated. When a crank pulse is detected, a variable m indicating a parameter number is set to 1 for example.
(Step S102). This parameter number is a number that specifies the type of one of the parameters of the ECU data and the measurement unit data, such as the absolute pressure in the intake pipe if m = 1 and the cooling water temperature if m = 2. . Next, control parameter data corresponding to the designated parameter number m is received from the ECU 21 or the measurement unit 22 (step S103), and the data is stored in the DP-RAM 46. Next, in order to receive the next control parameter, the parameter number m is increased by a predetermined value, for example, 1 (step S105). The parameter number m is compared with a preset maximum parameter number m _{COM_MAX} , for example, 256 (step S).
106). Parameter number m is the maximum parameter number m
If it is equal to or less than _{COM_MAX} , the process returns to step S103 and receives data corresponding to the next parameter number m (step S103). On the other hand, in step S106, the parameter number m is set to the maximum parameter number m _{COM_MAX}
If it is larger, it is determined that all data corresponding to the operation parameters to be captured in the communication circuit 40 has been captured, and a read request command is issued to the interface circuit 50 (step S107), and this subroutine is executed. To end. Thereafter, the interface circuit 50 that has received the read request command reads the data stored in the DP-RAM 46 and stores the data in the RAM 56 of the interface circuit 50.

FIG. 6 is a circuit diagram of the sensor output taking circuit 80.
Of a subroutine that processes the acquisition of sensor signal data
It is a flowchart. First, from crank angle sensor 1
Determine whether a crank pulse has been issued (Step
Step S201). When no crank pulse is emitted
In this case, this subroutine is terminated. In addition,
When a variable is detected, a variable n indicating a parameter number is used.
Is initialized to, for example, 1 (step S202). this
The parameter number is captured by the sensor output capturing circuit 80
One of the sensor signals, that is, one of the engine operating parameters
This number specifies the type of meter. Next, specify the
Captures sensor output data corresponding to parameter number n
Control the MPX83 to select the sensor output and
The log digital conversion is started (step S203), and the conversion is performed.
After the end, the sensor data is acquired (step S20).
4). Next, the sensor data is stored in the DP-RAM 87.
Remember (step S205). The following operating parameters
In order to capture, the parameter number n is set to a predetermined value, for example, 1
(Step S206). Parameter number
n is the preset maximum parameter number
n_{AD_MAX}, For example, 16 (Step S20)
7). Parameter number n is the maximum parameter number n_{AD_MAX}
If not, the process returns to step S203 and the next
Import sensor data corresponding to parameter number n
Step S203). On the other hand, in step S207,
Parameter number n is the maximum parameter number n _{AD_MAX}Greater than
In the case of
Capture all sensor data of operating parameters to be included
And the interface circuit 50
By issuing a read request command (step S208),
Exits the routine. Thereafter, a read request instruction is received.
The interface circuit 50 that has received the
Read the sensor data stored in the
This is stored in the RAM 56 of the base circuit 50.

After performing the data fetch process described with reference to FIGS. 5 and 6, the RAM 56 of the interface circuit 50
The ECU data, the measurement unit data and the sensor data stored in the control circuit 4 are read out at predetermined timings determined by the control circuit 4, for example, every 100 ms.
Stored in the AM (not shown). The control circuit 4 performs arithmetic processing for converting the stored ECU data, measurement unit data, and sensor data into physical values such as rotation speed and cooling water temperature, displays the physical values on the display 6 and displays the physical values. Analysis processing such as screen display of a time chart or failure determination and display according to the value is performed. Also,
By adopting a configuration that takes in ECU data and sensor data, not only the analysis of the engine but also the sensor and ECU
Can be determined.

In the above embodiment, the ECU data is extracted from the ECU by serial communication. However, the present invention is not limited to this, and it is apparent that parallel communication may be used. Also, it is clear that the crank angle sensor may be a reference crank position sensor. In this specification, an engine refers to an engine using fluid combustion such as an internal combustion engine or a hybrid engine.

[0023]

As described above, according to the data analyzing apparatus for an electronic control unit for an engine according to the present invention, there are provided ECU data capturing means for capturing ECU data of operating parameters and sensor data capturing means for capturing sensor data. Therefore, it is possible to analyze the operating state of the engine electronic control device and the engine based on the ECU data and the sensor data.

According to another aspect of the present invention, an ECU is provided.
The data is stored in the first memory in response to the pulse detection, and the first
Since the ECU data stored in the memory is read in response to the pulse detection, the ECU can be fetched from the engine electronic control unit at a preferable timing. Further, according to another feature of the present invention, the sensor data is stored in the second memory in response to the pulse detection, and the sensor data stored in the second memory is read out in response to the pulse detection. It is possible to take in sensor data from a sensor provided in the.

According to still another feature of the present invention, the ECU data and the sensor data stored in the third memory are read and analyzed. It is possible to analyze sensors provided in the device and the engine.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a data analysis device of an engine electronic control device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a communication circuit of a data analysis device of the engine electronic control device shown in FIG. 1;

FIG. 3 is a block diagram showing a sensor output capturing circuit of the data analysis device of the engine electronic control device shown in FIG. 1;

FIG. 4 is a block diagram showing an interface circuit of the data analysis device of the engine electronic control device shown in FIG. 1;

FIG. 5 is a flowchart showing a subroutine for processing data capture in a communication circuit of the data analysis device of the engine electronic control device shown in FIG. 1;

6 is a flowchart showing a subroutine for processing data capture in a sensor output capture circuit of the data analysis device of the engine electronic control device shown in FIG. 1;

[Description of Signs of Main Parts]

REFERENCE SIGNS LIST 1 crank angle sensor (crank pulse generation means) 4 control circuit (analysis means, control means) 5 data analysis device of engine electronic control device 21 ECU (engine electronic control device) 40 communication circuit (ECU data acquisition means, ECU data) Storage means) 46 DP-RAM (first memory) 50 Interface circuit (analysis means, relay means) 56 RAM (third memory) 80 Sensor output capture circuit (sensor data capture means, sensor data storage means) 87 DP-RAM (Second memory)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Atsushi Hachiya 6 at Shimizukoji, Wakabayashi-ku, Sendai City, Miyagi Prefecture Inside the Keihin Sendai Office (72) Inventor Masaaki Takagi 6, Shimizukoji, Wakabayashi-ku, Sendai City, Miyagi Prefecture Koichi Kadokawa, Inc. (72) Inventor Koichi Kadokawa, a shareholder at Keihin Sendai Office, 6-6 Shimizukoji, Wakabayashi-ku, Sendai, Miyagi Prefecture (72) Inventor Katsuhiko Suzuki 1-4-4 Chuo, Wako, Saitama No. 1 Inside Honda R & D Co., Ltd. (72) Hiroshi Kitagawa 1-4-1 Chuo, Wako-shi, Saitama Pref. No. Honda Research Laboratory

Claims (4)

[Claims] 1. An electronic control unit in an electronic control unit for controlling an engine.
Capture and store CU data while the engine is running,
A data analyzer of an electronic control unit for an engine that performs an analysis operation based on stored ECU data, comprising: a pulse detector that detects a crank pulse emitted from a crank pulse generator of the engine; and a pulse of the pulse detector. ECU data capturing means for capturing the ECU data from the electronic control device in synchronization with detection; ECU data storage means for storing the captured ECU data; and a sensor provided in the engine in synchronization with the pulse detection. Sensor data capturing means for capturing a sample value of an emitted analog signal as sensor data; sensor data storing means for storing the sensor data; and ECU data and the sensor data from the ECU data storing means and the sensor data storing means. Read and solve Data analyzer of the engine electronic control unit, characterized in that it comprises analyzing means for performing an operation, the. 2. The ECU data storage means comprises a first memory having two input / output ports, and stores the ECU data fetched via a first input / output port in response to the pulse detection. 2. The engine electronic control device according to claim 1, wherein the ECU data stored in the first memory is read out via the second input / output port in response to the pulse detection. Data analysis device. 3. The sensor data storage means comprises a second memory having two input / output ports, and the sensor data is stored in the second memory in response to the pulse detection via the first input / output port. The data analysis of the electronic control unit for an engine according to claim 1, wherein the sensor data stored in the second memory is read out via the second input / output port in response to the pulse detection. apparatus. 4. The analysis means has a third memory for storing the ECU data read from the first memory and the sensor data read from the second memory, A relay unit that reads the ECU data and the sensor data stored in the third memory in synchronization with each other; and a control unit that performs an analysis operation based on the ECU data and the sensor data that have passed through the relay unit. The data analysis device for an electronic control unit for an engine according to claim 2 or 3, wherein