JP2005092852A - Fault diagnostic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fault diagnostic device capable of arbitrarily setting a target value to an apparatus to be electronically controlled. <P>SOLUTION: On a display screen 31, a test operating section 32 is provided to instruct a test operation to the apparatus to be electronically controlled. The test operating section 32 includes an electronically controlled apparatus display part 33 indicating the apparatus to be electronically controlled and a target value setting part 34 capable of arbitrarily setting the target value to the apparatus to be electronically controlled. If the apparatus to be electronically controlled is selected by the electronically controlled apparatus display part 33 and the target value to the apparatus to be electronically controlled is set by the target value setting part 34, a fault diagnostic device 1 transmits, to an ECU 13, a command for setting the target value of the apparatus to be electronically controlled. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a failure diagnosis device that performs failure diagnosis by being connected to an ECU (Electronic Control Device) mounted on a vehicle such as a truck or a bus.

  As shown in FIG. 7, a failure diagnosis apparatus for a vehicle electronic control system is known (see, for example, Patent Document 1). In FIG. 7, the failure diagnosis device 1 is connected to an in-vehicle ECU 3 (electronic control device) via a communication line 2. Various commands are transmitted and received between the failure diagnosis apparatus 1 and the ECU 3 via the communication line 2. The failure diagnosis apparatus 1 includes a display unit 5, “S” key 6 a, “C” key 6 b, cursor key 7, “YES” key 8 a, “NO” key 8 b, and function key 9.

  The ECU 3 has a diagnosis function. This diagnosis function means a self-diagnosis function. That is, the ECU 13 monitors input signals from various sensors, actuators, and switches, and when an abnormality occurs in the input signal, the contents of the abnormality (diagnosis code) and data of the ECU 3 necessary for service are stored in the memory 4 as service data. I remember it.

The ECU 3 is connected to an actuator 10b for controlling the opening degree of, for example, an EGR (Exhaust Gas Recirculation System) valve 10a.
JP 2002-91545 A

  By the way, when the actuator operation mode is set, the failure diagnosis apparatus 1 can transmit a command to the ECU 3 to control the actuator 10b connected to the ECU 3.

  That is, the opening degree of the EGR valve 10a can be controlled from the failure diagnosis apparatus 1.

  Conventionally, a command for driving the EGR valve 10a is transmitted to the ECU 3, and the actuator 10b is operated under the control of the ECU 3 to drive the EGR valve 10a. Only the operator can confirm whether or not the EGR valve 10a has been driven by the drive command, so it has not been possible to confirm whether or not the EGR valve 10a is actually open.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a failure diagnosis apparatus capable of arbitrarily setting a target value for an electronic control apparatus such as an EGR valve.

  The invention according to claim 1 is a failure diagnosis device that is mounted on a vehicle and can be connected to an electronic control device that controls the electronic control device, and a test operation that gives a test operation instruction to the electronic control device on a display screen Set up a section. The test operation unit includes an electronic control unit display unit that displays the electronic control unit, and a target value setting unit that can arbitrarily set a target value for the electronic control unit.

  When the electronic control unit is selected in the electronic control unit display unit and the target value for the electronic control unit is set in the target value setting unit, the failure diagnosis apparatus sets the target value of the electronic control unit in the electronic control device. Send a command to

  According to the second aspect of the present invention, when the target value setting unit is displayed, the actual movement of the electronic control unit to which the target value is set is displayed on the actual operation display unit provided in the test operation unit. The

The invention according to claim 3 is a print command unit for instructing screen printing displayed on the display screen;
When the printing command unit is operated, the printing command unit includes printing means for instructing printing of the screen currently displayed on the display screen.

  According to a fourth aspect of the invention, there is provided a determining means for determining the target value set by the target value setting unit as a determined value.

  According to the first aspect of the present invention, since the target value setting unit capable of arbitrarily setting the target value is provided on the display screen, the target value of the electronic control apparatus can be arbitrarily set. As a result, it is possible to set a detailed numerical value as a target value from the target value setting unit, and it is possible to accurately test whether the electronic control apparatus operates correctly. Moreover, target workability | operativity can be improved.

  According to the second aspect of the present invention, since the actual movement of the electronic control unit is displayed on the actual operation display unit, the target value set in the target value setting unit and the electron target displayed on the actual operation display unit are displayed. By comparing the actual movement of the control device, it is possible to easily visually recognize whether the electronic control device is set to the target value.

  According to the third aspect of the present invention, the screen currently displayed on the display screen can be stored in paper.

  According to the fourth aspect of the present invention, the target value set by the target value setting unit by the determining means can be determined as the determined value.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram for explaining a connection between a failure diagnosis device and an electronic control device mounted on a vehicle, here, an ECU that controls an air suspension. Of course, the electronic control unit may be an engine ECU that controls the engine. In the figure, reference numeral 11 denotes a personal computer (hereinafter abbreviated as PC) that constitutes the fault diagnosis apparatus. The PC 11 is connected to an ECU 13 as an electronic control device mounted on the vehicle via a VCI (Vehicle Communication Interface) 12 as an interface device constituting the failure diagnosis apparatus. Examples of the ECU 13 include an ECU for engine control and an ECU for air suspension.

  The PC 11 and the VCI 12, and the VCI 12 and the ECU 13 are connected via multiple communication lines 14 and 15, respectively. One end of the multiplex communication line 15 is connected to a diagnosis connector 13d of the ECU 13.

  The VCI 12 has a function of converting a communication standard used for the ECU 13 into a communication standard used for the PC 11. The VCI 12 incorporates a microprocessor and has a memory 12m inside.

  The ECU 13 has a diagnosis function. This diagnosis function means a self-diagnosis function. That is, the ECU 13 monitors input signals from various sensors, actuators, and switches, and when an abnormality occurs in the input signal, the contents of the abnormality (diagnosis code) and the data at the time of abnormality are stored in the memory 13m as service data. Yes.

  Further, the ECU 13 is connected to actuators that respectively control an EGR valve, an intake throttle valve, a VGT (Variable Geometry Turbo) valve, and the like as electronic control devices. Sensors for detecting the EGR valve opening, the intake throttle valve opening, and the VGT valve opening are also provided for each valve, and the EGR valve opening, the intake throttle valve opening, and the VGT valve detected by each sensor are provided. The opening is stored as service data in a predetermined area of the memory 13m in real time.

  The configuration of the PC 11 will be described with reference to FIG. In FIG. 2, reference numeral 21 denotes a CPU (central processing unit) 21. The CPU 21 includes a ROM (Read Only Memory) 22, a RAM (Random Access Memory) 23, a key input unit 24, a touch panel display 25 having a rectangular display screen, an HDD (Hardware) via a system path 21 a. A disk device 26, a communication I / F 27, and a printer I / F 28 are connected. A printer 29 can be connected to the printer I / F 28.

  The HDD 26 stores a failure diagnosis program.

  This failure diagnosis program has the following program.

(1) Main program as shown in FIG.

(2) A program for displaying a corresponding screen by touching a button displayed on the display 25 and a program for executing processing designated by the button.

For example, when the determination button 42 is touched, command transmission means for transmitting a command to be a target value set by the target value setting unit 34 to the electronic control unit selected by the electronic control unit display unit 33;
Command transmitting means for transmitting a command for reading service data stored in the memory 13m to the electronic control unit selected by the electronic control unit display unit 33;
When the print button 41 (print command section) is touched, a program as a printing unit that prints the current display screen by transmitting data corresponding to the current display screen to the printer (not shown) via the printer I / F 28 Is remembered.

  The RAM 23 is provided with various work areas.

    Next, the operation will be described. When a starter switch (not shown) for the track is turned on, failure diagnosis shown in the flowchart of FIG. 3 is started.

  First, a startup screen as shown in FIG. 4 is displayed on the display 25 as a main menu (step S1). Next, when the “failure diagnosis” button is selected, a system selection screen for selecting a system for selecting three systems, engine, chassis, and body, is displayed on the display 25 (step S2). Next, when an engine is selected from this screen and engine control is selected, a function selection screen as shown in FIG. 5 is displayed (step S3).

  On this function selection screen, a plurality of buttons such as “self-diagnostic”, “service data”, “actuator test”, and the like are displayed.

  When “actuator test” is selected from this screen, a display screen 31 as shown in FIG. 6 is displayed on the display 25.

  The display screen 31 is provided with a test operation unit 32 that gives a test operation instruction to the EGR valve, the intake throttle valve, and the VGT valve.

  The test operation unit 32 includes an electronic control unit display unit 33 that displays an electronic control unit such as an EGR valve, an intake throttle valve, and a VGT valve, and a target value that can arbitrarily set a target value for the electronic control unit. A setting unit 34 and an actual operation display unit 35 for displaying the actual movement of the electronic control apparatus are provided.

  On the electronic control device display section 33, the item name of the electronic control device is displayed for each cell.

For example, EGR, intake throttle valve, and VGT are displayed. By touching the cell in which the item name of the electronic control device to be tested by the actuator is touched, the display of that part is reversed in black and white, and it is selected that the electronic control device of that item name is to be actuator tested.

  The target value setting unit 34 is provided with a slide button 36 that can arbitrarily set a target value.

  Further, a target value display section 37 for displaying the target value set by the slide button 36 as a numerical value is provided above the slide button 36.

  Further, below the slide button 36, a button 38a for slightly increasing the target value, a button 38b for largely increasing the target value, a button 38c for slightly decreasing the target value, and a button 38d for greatly decreasing the target value are provided. ing. When these buttons 38a to 38d are operated, the slide button 36 is also slid in conjunction with this, and the target value displayed on the target value display unit 37 is also followed.

  Further, the actual operation display unit 35 includes a graph display unit 39 for displaying the actual, that is, real-time movement of the electronic control unit selected by the electronic control unit display unit 33 and an electronic control unit display unit 33. A numerical value display unit 40 is provided for displaying the actual numerical value of the selected electronic control device.

  In the graph display unit 39 described above, the current data is plotted on the rightmost side and displayed so as to flow on the left side as time passes. Therefore, the numerical value displayed on the numerical value display unit 40 represents the numerical value of the rightmost data of the graph displayed on the gram display unit 39.

  On the menu bar displayed at the bottom of the display screen 31, a print button 41 and an enter button 42 are displayed.

  Next, how the actuator test is performed using the display screen 31 will be described. For example, a case where an actuator test of an EGR valve is performed will be described as an example. First, the operator selects to test the EGR actuator by touching the EGR cell displayed on the electronic control unit display unit 33.

  Next, the target value is arbitrarily set by sliding the slide button 36. The figure shows an example in which 75% is set as the EGR valve opening.

  Next, the determination button 42 is touched. As a result, the PC 11 transmits a command for setting the opening degree of the EGR valve to 70% to the ECU 13.

  In this way, the target value set by the target value setting unit 34 can be determined as the determination value by touching the determination button 42.

  Upon receiving this command, the ECU 13 outputs a control signal for setting the opening degree of the EGR valve to 70% to the corresponding actuator.

  As a result, the opening degree of the EGR valve is adjusted to a position where it becomes 70%.

  The EGR valve opening is detected by a corresponding sensor, and the EGR valve opening detected by this sensor is stored in the memory 13 as service data in real time.

  After transmitting the above-described command, the PC 11 transmits a command for periodically reading the EGR valve opening stored in the memory 13m to the ECU 13.

  In response to this command, the ECU 13 transmits the EGR valve opening to the PC 11. The EGR valve opening is plotted at the rightmost end of the graph display section 39 and the numerical value display section 40 displays the numerical value.

  In the figure, the EGR valve opening is 25%. This is because there is a time delay from the transmission of a command for setting the opening degree of the EGR valve to 70% to the ECU 13 until the opening degree of the EGR valve is actually adjusted. If the time delay elapses and the actuator is normal, the EGR valve opening is 70%.

  When it is confirmed that the actual EGR valve opening is 70% in this way, the slide button 36 is slid to set another target value. Subsequent operations are the same as those described above, and are therefore omitted.

  When the actuator test of the EGR valve is completed, it is selected to test another electronic control unit by touching another cell displayed on the electronic control unit display unit 33. The following operation is the same as the above-described actuator test of the EGR valve.

  As described above, the target value of the electronic control device can be arbitrarily set by sliding the slide button 36, and the actual movement of the electronic control device can be displayed on the actual operation display unit 35.

  As a result, it is possible to set a detailed numerical value as the target value from the target value setting unit, and it is possible to accurately test whether the electronic control unit operates correctly. In addition, the target workability can be improved.

  Whether the electronic control unit is set to the target value by comparing the target value set in the target value setting unit 34 with the actual movement of the electronic control unit displayed in the actual operation display unit 35. Can be easily recognized.

  When the print button 41 is touched, the screen print of the current display screen 31 is printed out to the printer 29 by the printing means described above.

  In this way, when the print button 41 is touched, the screen currently displayed on the display screen can be saved with paper.

  In the above embodiment, the programs corresponding to the various means are stored in the HDD 26. However, the present invention is not limited to this, and the programs corresponding to the various means are stored in an external storage means such as a CDROM or FD, and the PC 11 You may make it download to HDD26.

  Furthermore, although the touch panel type display is used in the above embodiment, each operation may be designated by a mouse in a PC that does not have a touch panel type display.

The figure for demonstrating the connection of the failure diagnosis apparatus which concerns on one embodiment of this invention, and ECU. The figure which shows the system configuration | structure of the personal computer which comprises the failure diagnosis apparatus which concerns on one embodiment of the embodiment. The schematic flowchart for demonstrating operation | movement of the failure diagnostic apparatus. The figure which shows the starting screen of the failure diagnosis apparatus. The figure which shows the function selection screen of the failure diagnosis apparatus. The figure which shows an actuator test screen. The figure for demonstrating the conventional failure diagnosis apparatus.

Explanation of symbols

11 ... Personal computer, 12 ... VCI (Vehicle Communication Interface)
13 ... ECU, 13m ... Memory, 26 ... HDD, 31 ... Display screen, 32 ... Test operation unit, 33 ... Electronic control unit display unit, 34 ... Target value setting unit, 35 ... Actual operation display unit, 36 ... Slide Button, 37... Target value display section.

Claims (4)

A fault diagnosis device mounted on a vehicle and connectable to an electronic control device for controlling an electronic control device,
A display screen;
A test operation unit for performing an operation instruction for a test on the electronic control unit displayed on the display screen,
The test operation unit includes an electronic control unit display unit that displays the electronic control unit,
A target value setting unit capable of arbitrarily setting a target value for the electronic control device;
A failure diagnosis apparatus comprising: 2. The test operation unit includes an actual operation display unit that displays an actual movement of the electronic control unit to which the target value is set when the target value setting unit is displayed. The described failure diagnosis device. A print command unit for instructing screen printing displayed on the display screen;
2. The failure diagnosis apparatus according to claim 1, further comprising a printing unit that instructs to print the screen currently displayed on the display screen when the printing command unit is operated. 2. The failure diagnosis apparatus according to claim 1, further comprising a determining unit that determines the target value set by the target value setting unit as a determined value.

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