JPH01288902A - Control method for vehicle control device at the time of abnormality generation - Google Patents

Abstract

PURPOSE:To activate a vehicle again without a usual troublesome operation at the time of slight abnormality by providing an abnormal condition detecting device and an abnormality control device, and applying self-restoring ability to them for the slight abnormality. CONSTITUTION:When abnormality exists in each working system, it is detected by an abnormal condition detecting device 4, and a signal based on a detection result is inputted to a vehicle control device 1. Based on the input, the device 1 outputs the signal to stop the working system, and the working system where the abnormality has occurred is topped. The device 1 judges through an abnormality control device 5 whether or not the vehicle restores a safety condition by means of the operation of an operator, and for example, when the vehicle is in the stay condition and in the safety condition, the stop condition of the abnormal system is released. When the abnormal condition is slight, and it is naturally dissolved, the device 5 judges it releases the stop condition, and activates the vehicle again. Thus, at the time of the slight abnormality, the vehicle can be activated again without the usual troublesome operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control method when an abnormality occurs in a vehicle control device controlled by a machine including electro-hydraulic, pneumatic, etc.

[Conventional technology]

The vehicle control device is, for example, as shown in FIG. 3, and includes signal input devices a, such as sensors.

a2. The input signal from a3 is received by the control device, and the output signal based on this is output from the control device to the drive device CI+ C2+ C3 such as a solenoid, and each drive device C1r C2+ C3 controls the hydraulic switching valve etc. in ascending order. It is designed to operate.

In such a vehicle control device, the input signal and output signal of the control device are constantly monitored, and if an abnormality is detected, the control of the system is stopped.
Compatible functions are provided.

This is to avoid serious abnormalities, such as dangers, such as the vehicle running out of control due to such an abnormality, or a fire occurring in the vehicle due to a short circuit in the electrical system.

The response function when an abnormality is detected in conventional vehicle control equipment is as follows:
- If the control of a certain system is stopped, the vehicle control device will be stopped, that is, unless the vehicle is completely stopped (including the power supply) and then restarted, even if the abnormal condition has been resolved, the system will stop. The systems that were destroyed were unlikely to function again.

[Problem to be solved by the invention]

In the above-mentioned conventional vehicle control device, control of the system is stopped in the same way as in the case of a serious abnormality even in the case of a minor abnormality that does not lead to a serious abnormality such as the failure of a connector, etc. . Therefore, even if a contact failure occurs in the connector due to vehicle vibration or the like, control of that system will be stopped by the response function upon detection of this abnormality. For this reason, if this vehicle is powered by a prime mover, it is necessary to stop the vehicle, stop the prime mover, and then restart them again, which requires extremely inconvenient and complicated operations. There was a problem.

The present invention has been developed in consideration of the above-mentioned problems, and has the ability to self-recover from minor abnormalities, so that in the case of minor abnormalities, the vehicle can be restarted without the need for complicated operations as in the past. It is an object of the present invention to provide a control method when an abnormality occurs in a vehicle control device that can be activated.

[Means and effects for solving the problem] In order to achieve the above object, the method of the present invention, when an abnormal state is detected in the control system of a vehicle, stops the function of the abnormal system, and then stops the control system of the vehicle. It is determined whether a safe state has been reached by the abnormal stop function or the operator's operation, and if No, the abnormal system continues to be stopped, and if Yes, the abnormal system is restarted.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 and 2.

An input signal is input to the control device 1 of the vehicle through a joystick 2 . Then, the control device 1 outputs an output signal based on this input signal to an actuator 3 such as a solenoid, and this actuator 3 operates the hydraulic system of the working machine to perform various tasks. . 4 is an abnormal state detection device provided in each work system, and 5 is an abnormality response device.The operating logic of both devices is as shown in Fig. 1, and when there is an abnormality in each work system, This abnormal state detection device 4 detects the abnormal state, a signal based on the detected signal is input to the vehicle control device 1, and the vehicle control device 1 outputs a signal to stop the work system in which the abnormality has occurred, stopping the work system in which the abnormality has occurred. be done.

In the vehicle control device in the above state, the abnormality response device 5 determines whether the vehicle has reached a safe state due to the above abnormal stop function or the operator's operation. When the system is in this state, the above-mentioned abnormal system is released from the stopped state.

Further, if the abnormal state is minor and has resolved itself, the abnormality handling device 5 determines this, cancels the stopped state, and restarts the system. This eliminates the need for complicated responses to minor abnormalities, and in some cases, the operator may not notice them. Further, if the above-mentioned abnormal condition continues, the abnormality handling device 5 determines this and stops the abnormal system again.

If any inconvenience arises when this state of serious abnormality and functional recovery is repeated, the number of times the stopped state can be canceled is limited.

In addition, if the control device 1 has a function to display the status after detecting an abnormality, it is possible to display the system in which the abnormality occurred even if the function is restored. By checking the display, you can see which part has a minor abnormality, which is useful for subsequent maintenance and convenient for continuing work.

The abnormal state detection device 4 that detects the safety state may be provided with a sensor dedicated to each work machine function, such as a vehicle stop sensor. , when applying the function of the present invention to the solenoid current abnormality detection function,
The neutral signal of the lever may be used as a device (signal) for detecting the safety state of the vehicle without adding any particular sensor or the like.

〔Effect of the invention〕

According to the present invention, the abnormality detection and response functions of conventional vehicle control devices are made self-recoverable in the case of minor abnormalities without making any major changes. This allows the vehicle to be restarted without the complicated operations required in the past.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention. Figure 1 is a corresponding logic diagram for abnormality detection, Figure 2 is a schematic overall configuration diagram, and Figure 3 is a schematic diagram of a conventional example. It is an overall configuration diagram. 1 is a control device, 2 is a joystick, 3 is an actuator, 4 is an abnormal state detection device, and 5 is an abnormality response device. Applicant Komatsu Manufacturing Co., Ltd. Representative Patent Attorney Masaaki Yonehara

Claims (1)

[Claims] When an abnormal state is detected in the control system of the vehicle, the function of the abnormal system is stopped, and then it is determined whether the vehicle has reached a safe state due to the abnormal stop function or operator's operation, and if no, 1. A control method when an abnormality occurs in a vehicle control device, characterized in that an abnormal system continues to be stopped, and if YES, the abnormal system is restarted.