JP4188577B2 - Start-up system for fault diagnosis means in a combine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an activation system for failure diagnosis means in a combine.
[0002]
[Prior art and problems to be solved by the invention]
Some work vehicles such as tractors and combiners are provided with a control device for controlling a work machine and a machine body, and the control device usually includes a calculation unit such as a CPU. The control unit controls the operation of actuators such as motors and solenoids connected to the control unit side to perform various automatic controls and manual controls.
[0003]
For this reason, if a failure occurs on the control unit side, the automatic control or manual control becomes impossible. Therefore, conventionally, a check system for checking whether or not a control signal to the actuator is normally output from the CPU is provided on the work vehicle side so that a failure on the control unit side can be diagnosed.
[0004]
A dedicated switch for operating the check system is provided on the work vehicle side, and the operator operates the switch to operate the check system to diagnose a failure on the control unit side (CPU). Was composed. However, since the switch is provided independently, there is a disadvantage that the cost is increased.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the failure diagnosis means activation system in the combine according to the present invention is provided with a control unit 3 for controlling the device 6 connected to the output side based on the input signal, and on the input side of the control unit 3 A work implement clutch switch 7 for detecting the on / off of the work implement clutch for turning on / off the work implement comprising the threshing section and the pretreatment section is connected, and the control section 3 has a predetermined predetermined engine start condition . An on / off state of the work implement clutch is detected by the work implement clutch switch 7 and an engine start restricting means for restricting engine start when the work implement clutch is in an engaged state, and a predetermined signal is output from the control unit 3 side. automatically and fault diagnosis means for to notification determines abnormality of the output system of the control unit 3, a failure diagnosis unit when the start condition of the engine is not equipped by A startup allowed to activation means, is characterized in that the provided.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings. The activation system for failure diagnosis means according to the present invention is employed in a work vehicle such as a tractor or a combine equipped with a control device for controlling a work machine or an airframe, and FIG. 1 is a block diagram of the combine control device 1 employing the present invention. It is.
[0007]
A control device 1 shown in FIG. 1 includes a control unit 3 having an arithmetic device (CPU or the like) 2, and various automatic control switches and sensors (switches) for detecting manual operations on the input side of the control unit 3. And the like, and the control device 6 such as an actuator such as a motor or solenoid for automatic control or manual control, an indicator, or a controller is connected to the output side.
[0008]
As the switch, a work machine clutch switch 7 for detecting the on / off of the work machine clutch lever for turning on / off the drive (work machine clutch) of the work machine (threshing unit, pre-processing unit, etc.), main shift for changing the traveling speed of the machine Neutral switch 8 for detecting that the lever is in the neutral position, clutch switch 9 for detecting that the main clutch is disengaged and operated (the clutch pedal is depressed), and a working depth for automatically controlling the working depth. The automatic depth control switch 11 that controls automatic control on / off, the automatic direction switch 12 that controls automatic on / off direction control that automatically controls the running direction, and the automatic sorting control that automatically controls the grain sorting function. Automatic sorting switch 13 for turning on / off, engine starter switch (ignition key switch) 4 is provided.
[0009]
Further, as the actuator, there are provided a motor 16 for automatic sorting control, solenoids 17 and 18 corresponding to left and right traveling devices for automatic direction control, and a motor 19 for automatic handling depth control, and further an automatic sorting control motor as an indicator. A sorting automatic lamp 21 for notifying on / off, a direction auto lamp 22 for notifying on / off of automatic direction control, a handling depth automatic lamp 23 for notifying on / off of automatic depth control, and an alarm device 24 for generating an alarm sound are provided. ing. An engine stop unit 26 for stopping the engine is provided as a controller.
[0010]
The control device 1 is configured as described above, and activates predetermined automatic control (corresponding to the switch that has been turned on) by turning on / off each automatic control switch, and operates each corresponding actuator under predetermined conditions. To perform each automatic control. Further, the state in which the predetermined automatic control is operating is notified to the operator by turning on an indicator corresponding to each automatic control.
[0011]
In addition, the control device 1 is also provided with an engine start restricting function (engine start restricting means). The engine start restricting function monitors the on / off state of each of the switches, and the starter switch 14 is turned on ( When a predetermined engine start condition is not satisfied when the power is turned on, the engine stop unit 26 is operated to restrict the start of the engine.
[0012]
In the case of this embodiment, the engine start condition is that the clutch pedal is depressed (clutch switch 9 is ON), the main transmission lever is in the neutral position (neutral switch 8 is ON), and the work implement clutch lever Is in the off state (the work machine switch 7 is ON). That is, when the engine is started, the work machine does not operate (because the work machine clutch lever is in the disengaged state), and the aircraft does not travel (the main clutch is in the disengaged state and the transmission is in the neutral state). ing.
[0013]
On the other hand, the control device 1 is provided with a check system (failure diagnosing means) for checking whether or not the control signal to the control device 6 connected to the output side such as an actuator is normally output from the CPU 2 side. As will be described later, the check system is activated according to an automatic control flow for activating automatic handling depth control, automatic direction control, and automatic sorting control so that a failure on the control unit 3 side can be diagnosed. It is configured.
[0014]
At this time, the check system outputs a minute control signal from the CPU 2 side to the extent that the control device 6 does not operate, and returns the minute control signal to the input side of the CPU 2 via the return circuit 27, so The signal output is checked, and whether or not each output signal is normally output is diagnosed to diagnose a failure of the control unit 3 itself.
[0015]
Next, the automatic control flow (check system activation means) will be described with reference to FIG. First, when the key (starter switch) is turned to the accessory position, the power is turned on and the flow is started. In step S1, each part is initialized. Thereafter, in step S2, the engine start condition is checked. If the start condition is not satisfied, the process proceeds to step S3 to activate the check system.
[0016]
In step S4, the check result by the check system is confirmed. If the result is normal, the process proceeds to step S5, the alarm device 24 is driven to sound a normal alarm sound, and then automatic handling depth control, automatic direction control, and automatic sorting. Start control. If there is an abnormality in the check result in step S4 (if an abnormality has occurred in the output of the control signal), the process proceeds to step S6, the alarm device 24 is driven to sound an abnormal alarm sound, and then step S7. Proceed to
[0017]
In step S7, as will be described later, an abnormal part is notified using an indicator or the like, the process returns to step S6, and steps S6 and S7 are repeated. If the engine start condition is satisfied in step S2, direct handling depth automatic control, automatic direction control, and automatic sorting control are activated.
[0018]
On the other hand, as described above, the indicator notifies each automatic control on / off by lighting. When the predetermined automatic control is turned on, the lamp corresponding to the automatic control is turned on, and when the automatic control is turned off, the lamp is turned on. It is configured to turn off.
[0019]
Therefore, in the automatic control flow, in step S7, particularly when an error (abnormality) is detected in the output signal to the actuator, an indicator for automatic control assigned to the actuator to be driven by the control signal in which the error is detected. (Lamp) is blinked to notify that the automatic control is not activated due to an error related to the control signal on the control unit 3 side.
[0020]
The engine start condition in step S2 can be checked by monitoring at least one of ON and OFF of the clutch switch 9, the neutral switch 8, and the work implement switch 7 related to the engine start condition. Is configured to monitor whether the work implement switch 7 is turned on or off, and to determine that “the engine start condition is not satisfied” when the work implement switch 7 is OFF (the work implement clutch is engaged and in an operating state).
[0021]
Further, the normal alarm sound generated in step S5 and the abnormal alarm sound generated in step S6 are set to be different from each other. It is determined whether the check result in step S4 is normal or not. It is configured to be able to discriminate by type.
[0022]
Since the check system is configured to be started by the automatic control flow shown above, whether or not the check system is started is whether the engine start condition is adjusted (in the case of this embodiment, the engine is started) Determined by the previous operation machine clutch lever on / off operation).
[0023]
For this reason, there is no need to provide a dedicated switch for starting the check system, and the cost can be reduced. Since the engine does not operate when the check system is activated, the operator's unexpected aircraft side during the operation of the check system Can be prevented from malfunctioning.
[0024]
In addition, as described above, whether the check result is good or not can be determined by an alarm sound from the alarm device 24. In other words, the alarm sound is always set to sound when the check system is activated (actuated). On the other hand, the operating condition of the check system is that “the engine start condition is not satisfied”. Therefore, if the engine start condition is not satisfied after all, an alarm sound for notifying the check result is sounded.
[0025]
In other words, the alarm sound of whether the check result is good serves both as notifying the operator of the check result and notifying the operator that the engine start condition is not satisfied. A warning sound from 24 is notified. In the case of this embodiment, the alarm device 24 functions as a horn, and the alarm is provided by the horn. The alarm device 24 is a notification device that notifies the diagnosis result of the failure diagnosis means by sound.
[0026]
【The invention's effect】
According to the structure of the present invention configured as described above, when the start-up means does not satisfy the engine start condition, the trouble diagnosis means is automatically activated by, for example, engaging and operating the work implement clutch before starting the engine. Therefore, it is not necessary to provide a dedicated switch for starting up the failure diagnosis means, so that the cost can be reduced and the engine does not operate when the failure diagnosis means is started. There is an effect that it is possible to prevent an unexpected malfunction of the airframe by the operator.
[0027]
In addition, by providing a notification device that notifies the diagnosis result of the failure diagnosis means, the operator can determine the diagnosis result (good or bad) by the sound (alarm sound) from the notification device. Is that the engine start conditions are not met, so if the engine start conditions are not met, an alarm will sound and this alarm will warn that the engine start conditions are not met There is also an advantage that the alarm sound is also used.
[Brief description of the drawings]
FIG. 1 is a block diagram of a control device.
FIG. 2 is a flowchart of an automatic control flow.
[Explanation of symbols]
3 Control unit 6 Control equipment (equipment)
7 Work implement clutch switch 24 Alarm (notification device)

Claims (1)

A control unit (3) for controlling the device (6) connected to the output side based on the input signal is provided, and driving of a work machine including a threshing unit and a preprocessing unit is provided on the input side of the control unit (3). A work machine clutch switch (7) for detecting on / off of the work machine clutch to be turned on / off is connected, and the work machine clutch on / off state which is a predetermined predetermined engine start condition is connected to the control unit (3). Engine start restricting means for restricting engine start when the work implement clutch is in the engaged state as detected by the clutch switch (7), and by outputting a predetermined signal from the control portion (3) side, the control portion (3 a failure diagnosis means for abnormality by determining broadcast output system), you to combine provided with activation means allowed to start the fault diagnosis unit automatically, the when the start condition of the engine is not equipped Start-up system of failure diagnosis means that.

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