JPH0611419A - Troubleshooting device for vehicle - Google Patents

Abstract

PURPOSE:To make troubleshooting quickly with simple operation. CONSTITUTION:A troubleshooting device for a vehicle comprises a pump controller 16, valve controller 17, governor controller 18, operational member 8 to emit an operational command to these controllers, sensor 20 to sense the oil pressure and engine revolving speed, a failure diagnosing device 30 having a display part 31, and IC memory card 32 in which the contents of the troubleshooting manuals are stored. The failure is diagnosed from the car control signal such as a sensor signal and operation commands from the controllers and on the basis of the stored data in the IC memory card 32, and the procedures of troubleshooting diagnoses are displaed on the display part 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for diagnosing a failure of a construction vehicle or an industrial vehicle.

[0002]

2. Description of the Related Art Construction vehicles and industrial vehicles are equipped with an engine, a power transmission device, and a working device operated by hydraulic pressure in addition to a traveling device, and the number of failure occurrence points is much larger than that of a general traveling vehicle. It is very difficult to diagnose which part is abnormal when the vehicle does not operate normally.

For this reason, conventionally, a repair manual is prepared in which failure phenomena that do not operate normally and inspection items corresponding to the malfunction phenomena are created in advance, and the electrical system is inspected according to the description content of the repair manual from the failure phenomena actually displayed on the vehicle. And the hydraulic system is inspected to find a defective part. For example, the inspection of the electric system is a continuity check of electric wires and sensors and the measurement of vehicle control signals, and the inspection of the hydraulic system is the measurement of hydraulic pressure and the measurement of the engine rotation speed. In addition, the controller that outputs the operation command to each operating member based on the operation command of each operating member is provided with a function to check whether each member is operating normally, and the controller abnormality (for example, decrease in hydraulic pressure, decrease in rotation speed) , Etc.) is displayed as a code, the repair manual is read and decoded based on the displayed code, and the defective part is found by inspecting according to the repair manual.

[0004]

However, such a failure diagnosis method has the following problems. 1. In order to measure the control signals for controlling the vehicle, the oil pressure, and the engine speed, it is necessary to remove the exterior of the vehicle, and it takes time to confirm the measurement location, attach measuring instruments, and so on. , I cannot measure quickly. 2. When measuring different signals at the same time, it is not possible to measure all the signals in one place. For this reason, multiple measurers are required and quick measurement cannot be performed. 3. In order to determine whether or not the vehicle is out of order based on the measurement result, it is necessary to look at the repair manual, and when the control of the vehicle is complicated, it takes a long time to view the repair manual and quick diagnosis cannot be performed. 4. Even if the fault code is displayed from the controller, it is impossible to immediately decipher the code and it is necessary to check the fault item by looking at the repair manual and execute the fault diagnosis, so that quick diagnosis cannot be performed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a vehicle failure diagnosis device which can solve the above problems.

[0006]

A controller for controlling the operation of each member based on an operation command of an operating member 8, a sensor for detecting the operation status of each member and outputting the same to the controller, and a controller connected to the controller. A failure diagnostic device 30 having a display unit 31 and an IC memory card 32 for storing diagnostic procedures, failure items, reference values, etc. described in the repair manual in advance and set in the failure diagnostic device 30 are provided. The controller has a function of judging an abnormality of each member based on the operation command and the sensor detection signal and outputting a failure code signal, and connecting the controller and the failure diagnostic device 30 to operate the operation command / detection signal and the like. The vehicle control signal and the failure code signal are input to the failure diagnosis device 30,
A vehicle failure diagnosis device configured to perform a failure diagnosis based on the signal and stored data in the IC memory card 32 and to display a diagnosis procedure and the like on the display unit 31.

[0007]

[Operation] Measures vehicle control signals input to the controller side, such as engine rotation speed signals, hydraulic signals, operation command signals, sensor signals, etc., quickly without incidental work such as removing the outer cover. It is possible to collate the measured value with the reference value data on the IC memory card, perform automatic diagnosis, decode the failure code output from the controller, and display the necessary diagnosis procedure on the display unit 31.

[0008]

[Example] As shown in FIG. 1, an upper vehicle body 2 is rotatably attached to a lower traveling body 1 by a turning mechanism 3, and an operator cab 4, an engine 5, a hydraulic pump 6, a valve 7 and the like are mounted on the upper vehicle body 2. An operating member 8 is provided in the cab 4. A boom 9 is provided on the upper vehicle body 2 so as to be vertically rotatable by a boom cylinder 10, an arm 11 is provided on the boom 9 for vertical movement by an arm cylinder 12, and a bucket 13 and a bucket cylinder 14 are provided on the arm 11. Tilt with
The excavator is configured so that the dump truck can be operated freely.

As shown in FIG. 2, the dashboard 15 of the cab 4 controls the pump controller 16 for controlling the hydraulic pump 6, the valve controller 7 for controlling the valve 7, and the rotational speed of the engine 5. A governor controller 18 for controlling a governor (not shown) and a monitor panel 19 are provided.

The pump controller 16 is an operating member 8
Control the operation of the hydraulic pump 6 based on the operation command from
A vehicle control signal is input to the pump controller 16 from a plurality of sensors 20 such as a hydraulic sensor provided in a hydraulic system, and it is determined whether or not each member is abnormal based on the input vehicle control signal and an operation command. Has a function of outputting as a failure code.

The valve controller 17 is an operation member 8
A solenoid 21 for switching the valve 7 is energized to control the valve 7 based on an operation command from the operator, and thereby the valve 7 is switched to drive the traveling hydraulic motor of the lower traveling body 1, the traveling hydraulic motor of the revolving mechanism 3, the boom cylinder 10, the arm cylinder. 1
2. The hydraulic fluid discharged from the hydraulic pump 6 is supplied to the bucket cylinder 14 and the like, and a vehicle control signal is inputted to the valve controller 17 from a plurality of sensors 20 such as a hydraulic pressure sensor provided in the hydraulic system. It has a function of judging whether or not each member is abnormal based on the vehicle control signal and the operation command, and outputting it as a failure code.

The governor controller 18 is an operation member 8
The governor controller 18 controls the engine speed by controlling the operation of the governor based on the operation command input from the vehicle control signal from the sensor 20 such as the engine rotation sensor. And a function to judge whether each member is abnormal based on the operation command and output as a failure code.

The monitor panel 19 has a setting switch 22.
Signal and the vehicle body control signal from the sensor 20 such as a fuel gauge and the failure code data input from the controller are stored, and output together with the time data in the monitor panel 19 by a call signal.

The failure diagnosing device 30 is composed of a personal computer or the like and has a computing / storing function, and the display unit 31 and the IC memory card 3 storing the failure diagnosing program and reference value data.
2 includes an insertion portion 33, a battery 34, a printer connection connector 36 for connecting the printer 35, and a vehicle network connection connector 37. The vehicle network connection cable 38 is connected to the network connection connector 37 and the connection connector 39 of the dashboard 15, and is equipped with an adapter 40 for adjusting the network signal and the electrical level of the failure diagnostic device 30. The governor controller 18, the pump controller 16, the valve controller 17, and the monitor panel 19 are connected by a network circuit 41. The network circuit 41 is connected to the connection connector 39 and each signal is sent from the failure diagnosing device 30 by a calling signal. The data is output to the failure diagnostic device 30. In order to change the reference value and the data of the faulty part stored in the IC memory card 32, update data is created from the data maintenance personal computer 42 as shown in FIG. To send.
Further, in order to create a report, data such as registration, update and deletion of customer name and worker name are input by the data maintenance personal computer 42 and sent to the failure diagnosing device.

Next, the failure diagnosis operation will be described with reference to the flow chart shown in FIG. 1. The battery 34 and the IC memory card 32 are attached to the failure diagnosing device 30, the failure diagnosing device 30 and the network connection connector 39 are connected by the connection cable 38, and various failure code signals are output by turning on the key switch or starting the engine. Preparation for receiving the vehicle control signal by the fault diagnostic device 30 is completed. When the network connector 39 is not connected, the normal vehicle control state is entered. 2. When the power switch 44 of the failure diagnosing device 30 is turned on in the above-described state, the failure diagnosing flow chart starts, and the initial setting of the internal registers is automatically performed, and the display unit 31 displays the password input screen shown in FIG. . The operator inputs a preset password, and the display unit 31 of the failure diagnostic device 30 shifts to a network communication status check screen. This check screen is as shown in FIG. 3. On the network communication status check screen, the monitor panel 19 of the vehicle and the controllers 16, 17, 18 are shown.
I am checking whether the signal from can be received normally. If it is normal, OK is displayed if it is abnormal,
Displays the corrective action when abnormal. When the reception state is confirmed, the display unit 31 shifts to a screen for selecting each diagnostic work. 4. On the diagnosis work selection screen, a work to be executed is selected from the failure diagnosis work menu. 5. The display unit 31 displays the failure content and the diagnosis procedure of the selected failure diagnosis work as shown in FIG. 7, for example. As a result, for the abnormality detected by the controller and the monitor panel, the failure code from the controller is received, the code is decoded, and the diagnostic procedure is displayed. The operator proceeds with the diagnosis according to the diagnosis procedure and determines the failed part. 6. When monitoring the state of the vehicle control signal, the vehicle control signal from the monitor panel or each controller is received, the signal is decoded and displayed on the display unit 31. At this time, for example, as shown in FIG. 8, an arbitrary control signal is selected and displayed on the display unit 31 if necessary. 7. When displaying a failure that occurred in the past, for example, as shown in FIG.
As shown in (1), the failure history code signal is received from the monitor panel, the code is decoded, and the failure history is displayed on the display unit 31. 8. For a failure phenomenon that cannot be detected by each of the controllers 16, 17 and 18, when the operator selects a failure phenomenon item displayed on the display unit 31, a failure diagnosis procedure is displayed on the display unit 31 as shown in FIG. The vehicle control signal is received, if necessary, and collated with the reference value stored in advance on the IC memory card 32, the failure is automatically determined, and the failure diagnosis is advanced to finally determine the failed part. Determine. 9. After the failure diagnosis is completed as described above, I input the coser name, operator, etc. to prepare a report.
The C memory card 32 is inserted into the failure diagnosing device 30, the printer 35 is connected to the cable 44, and the printer 35 prints out the failure diagnosing result report in which the diagnosis result, the inspection result, the treatment, etc. are entered. 10. When the learning function is selected, the operation method learning communication data is stored in the IC memory card 32 in advance, and the work described in items 4 to 9 is executed based on the data 12. 11. When the above items 4 to 9 are completed, the work selection screen is displayed to select whether to execute the next work or stop the work. That is, since a certain degree of proficiency is required for the failure diagnosis using the failure diagnosis device 30 described above, the operating method is stored in the IC memory card 32 by the manufacturer side, and the IC memory card 32 fails. It is designed to be inserted into the diagnostic device 30 for practicing beginners.

Next, the data maintenance operation of the IC memory card 32 will be described with reference to the flowchart of FIG. For data maintenance of the IC memory card 32, registration / deletion of user name / operator name / registration of reference value /
For example, the IC memory card 32 may be deleted and the failure diagnostic device 3
The failure diagnosis device 30 is set to 0 and connected to a data maintenance personal computer 42 installed in an office, and the data maintenance personal computer 42 is operated.

[0017]

The vehicle control signal input to the controller side, for example, the engine speed signal, the hydraulic signal, the operation command signal, the sensor signal, etc., can be measured quickly without any auxiliary work such as removing the outer cover. Can be measured,
Compare the measured value with the reference value data on the IC memory card,
It is possible to perform automatic diagnosis, decode the failure code output by the controller, and display the necessary diagnosis procedure on the display unit 31. Therefore, work such as removing the cover for diagnosing a failure is omitted, and it is possible to speed up the diagnosis work without the need to install a measuring instrument, and it is automatically judged whether the measured value is out of the reference value. Therefore, the operator does not need to see the repair manual and the like, and the diagnosis work can be speeded up. Moreover, since the diagnosis result can be immediately printed out, a quick report can be created for the user. Further, the maintenance of data such as the change of the reference value becomes easy, and the reliability of the diagnosis result increases. Further, there is a function for the operator to learn the operation method, so that the operator can become accustomed to the operation of the failure diagnosis device and prevent an operation error or the like.

[Brief description of drawings]

FIG. 1 is a schematic front view of a power shovel.

FIG. 2 is a block diagram of a failure diagnosis device.

FIG. 3 is a diagram illustrating a data maintenance operation of an IC memory card.

FIG. 4 is a flowchart of a failure diagnosis operation.

FIG. 5 is an explanatory diagram of a display screen of a display unit.

FIG. 6 is an explanatory diagram of a display screen of a display unit.

FIG. 7 is an explanatory diagram of a display screen of a display unit.

FIG. 8 is an explanatory diagram of a display screen of a display unit.

FIG. 9 is an explanatory diagram of a display screen of a display unit.

FIG. 10 is an explanatory diagram of a display screen of a display unit.

FIG. 11 is a flowchart of a data maintenance operation of the IC memory card.

[Explanation of symbols]

16 ... Pump controller, 17 ... Valve controller, 18 ... Governor controller, 20 ... Sensor, 30 ...
Failure diagnosis device, 31 ... Display unit, 32 ... IC memory card,
35 ... Printer, 42 ... PC for data maintenance.

Claims (4)

[Claims] 1. A controller that controls the operation of each member based on an operation command of the operation member 8, a sensor that detects the operation status of each member and outputs the same to the controller, and a display unit 31 connected to the controller. Fault Diagnostic Device 3
0, and an IC memory card 32 that stores the diagnosis procedure, failure item, reference value, etc. described in the repair manual in advance and is set in the failure diagnosing device 30, and the controller outputs an operation command and a sensor detection signal. It has a function of judging an abnormality of each member based on the output based on a fault code signal, and connects the controller and the fault diagnostic device 30 to a vehicle control signal such as an operation command / detection signal and a fault code signal for fault diagnosis. Input to the device 30, and the signal and IC memory card 3
A failure diagnosis device for a vehicle, which is configured to perform a failure diagnosis based on the stored data of No. 2 and to display a diagnosis procedure and the like on the display unit 31. 2. The fault diagnostic device for a vehicle according to claim 1, wherein a print 35 for printing out display data and the like is connected to the fault diagnostic device 30. 3. The vehicle failure diagnosis device according to claim 1, further comprising a data maintenance personal computer 42 connected to the failure diagnosis device 30 for changing data of the IC memory card 32. 4. The failure diagnosis device 3 is mounted on the IC memory card 32.
The signal received by 0 is stored in advance, and by setting this IC memory card 32 in the failure diagnosing device 30, it is possible to display a failure diagnosis, a diagnostic procedure, etc. even if no signal is input from the controller. Vehicle failure diagnosis device.