JPH03487B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Technical Field] The present invention relates to an abnormality record transmission device that stores a history of abnormal conditions in an internal combustion engine and transmits the history to the outside.

"Prior Art" Generally, when diagnosing the condition of an internal combustion engine,
Records of past abnormal conditions that occurred in the internal combustion engine will be a great reference. For this reason, engine users record the status of the internal combustion engine using a recording device such as a data logger that automatically records various data of the internal combustion engine. It is kept as.

``Problems to be Solved by the Invention'' However, when performing maintenance diagnosis, if one attempts to extract only the necessary information at the time of an abnormal state from among the various data recorded by the above-mentioned conventional recording device,
Because the amount of data recorded is large, it is extremely time-consuming and difficult to use as reference material when diagnosing an engine. In addition, maintenance diagnosis work is often carried out by workers at the engine manufacturing company or maintenance inspection company rather than by the engine user, but in this case, some of the various data recorded in the conventional recording device mentioned above Since it includes information unique to the user, there is a problem in that the various data are not provided.

The present invention was made in view of the above circumstances, and
The purpose of this is to be able to quickly and easily retrieve records of past abnormal conditions that have occurred in the internal combustion engine when performing maintenance diagnosis on the internal combustion engine.
An object of the present invention is to provide an abnormality record transmission device for an internal combustion engine that can accurately diagnose the state of the internal combustion engine.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides a plurality of measuring instruments for measuring pressure, temperature, rotation speed, etc. of each part of the engine body, and a system for detecting abnormal conditions in the engine body. a timekeeping device that detects the time; and a central processing unit that determines an abnormal state of the engine main body based on the output of each of the measuring devices and stores the time and abnormality data output by the timekeeping device in a storage device; The apparatus is equipped with a transfer direct cooling device that outputs a command signal to the central processing unit to send the abnormal state history stored in the storage device via the serial transmission device.

"Operation" In the abnormality record transmission device of the present invention, the abnormal state of the engine body is determined in the central processing unit based on the output of the measuring device that measures the pressure, temperature, rotation speed, etc. of each part of the engine body. The abnormal state history stored in the storage device is stored in the storage device with the abnormal data and the time outputted by the above-mentioned timing device, and the abnormal state history stored in the storage device is generated by the command signal of the transfer index cooling device outputted to the central processing unit. is sent to the transfer command device via the serial transmission device.

"Embodiment" Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 4.

1 in the figure is a central processing unit (microcomputer), and this central processing unit 1 has contacts such as pressure switches and temperature switches for detecting abnormalities such as pressure and temperature in various parts of the engine body of the internal combustion engine. The detector 2 is connected to an A/D converter (analog digital converter) 5. In addition, the central processing unit 1 includes:
A storage device 6 and a clock device 7 are connected to each other.
A backup power source 8 is connected to keep each device 6, 7 in operation at all times. Then, the central processing unit 1 is based on the contact signal of the contact detector 2 inputted via the I/O circuit 3 or the measurement data of the measuring instrument 4 inputted via the A/D converter 5. , determine the abnormal state of the engine body, identify the abnormality items, and various measurement data strings (e.g. horsepower, exhaust temperature, supply air temperature,
room temperature, etc.) and the time indicated by the clock device 7 are stored in an abnormal state file inside the storage device 6. Furthermore, the storage device 6 contains a first pointer indicating the final address at the time when the internal abnormal state history (abnormal item, time, measurement data string) of the abnormal state file was last sent to the outside.
PT1, a second pointer (alarm pointer) PT2 that sequentially advances addresses from the first address of the abnormal state file to be used when sending the entire abnormal state history of the abnormal state file, and a second pointer (alarm pointer) PT2 that is stored in the above abnormal state file. A third pointer PT3 indicating the address of the latest abnormal state history is installed.
Abnormal status file and each pointer PT1, PT2,
The contents of PT3 are determined by the backup power supply 8 mentioned above.
It is designed to be retained even during a power outage.

Furthermore, a transfer command device 10 is connected to the central processing device 1 via a serial transmission device 9, which outputs various command signals to the central processing device 1. These command signals include the transfer command device 1 of the new abnormal state history from the storage device 6.
A command e to transfer to 0, a command E to transfer all abnormal state history in the abnormal state file, etc. are predefined.

Immediately after maintenance diagnosis work is performed on an internal combustion engine incorporating the abnormality record transmission device configured as described above and a new abnormal state history in the abnormal state file is sent to the transfer command device 10,
The addresses indicated by the first pointer PT1 and the third pointer PT3 match (in FIG. 2, the third pointer PT3 matches the address of the first pointer PT1). In this state, the internal combustion engine starts operating, and the outputs of the contact detector 2 and the measuring device 4 are
o The signal is sent to the central processing unit 1 via the o circuit 3 and the A/D converter 5, and the central processing unit 1 controls each part of the engine body based on the contact signal from the contact detector 2 or the measurement data from the measuring device 4. When determining that there is an abnormality in the pressure, temperature, rotation speed, etc. of The data is stored at the address next to the address indicated by the first and third pointers PT1 and PT3. At this time, the third pointer PT3 is updated (advanced by one) and the address of the newly stored abnormal state history is transferred to the third pointer PT3.
Do as shown. Furthermore, the central processing unit 1
Each time an abnormality in the engine body is determined, the time, abnormality item, and measurement data string are sequentially stored in the address next to the address indicated by the third pointer PT3 in the abnormal state file, and the third pointer PT3 is displayed. Addresses will also be added sequentially.

As described above, in FIG. 2, in the state in which the history of newly occurring abnormal states has been sequentially stored in the internal storage area A of the abnormal state file after the last maintenance diagnosis work,
When the maintenance diagnosis time comes again, a process is performed to send out a history of newly occurring abnormal conditions, as shown in FIG. That is, the central processing unit 1 monitors the input of a command signal from the transfer command device 10 (see step SP1), and when the command signal is input via the serial transmission device 9, the command signal becomes a command. e (see step SP2). If the command is not e, the process ends, but if the command is e, the central processing unit 1 proceeds to step SP3.
As shown in FIG.
It is determined whether the addresses indicated by PT1 and third pointer PT3 match. At this time, as shown in FIG. 2, since the addresses indicated by the first pointer PT1 and the third pointer PT3 do not match, the address indicated by the first pointer PT1 is advanced by one, as shown in step SP4. Then, as shown in step SP5, the first
The contents of the abnormal state stored at the address indicated by the pointer PT1 are transmitted to the transfer command device 10 via the serial transmission device 9. Next, the process returns to step SP3, and the first pointer PT1 and the third pointer PT3 are set again.
It is determined whether the addresses indicated by and match.

In this way, the processes shown in steps SP3 to SP5 are repeated until the addresses indicated by the first pointer PT1 and the third pointer PT3 match, and the addresses indicated by the first pointer PT1 and the third pointer PT3 match. Then, the central processing unit 1 ends the transfer process.
As a result, on the transfer command device 10 side, in FIG. 2, the newly stored abnormal state is stored in the storage area A from the address indicated by the first pointer PT1 to the address indicated by the third pointer PT3. All history will be transferred. At this time, the abnormal state history is stored in the abnormal state file after the transfer from its first address to the address indicated by the third pointer PT3 (first pointer PT1), and from then on, the abnormal state history is stored in the storage area B. , nothing is stored.

The transfer command device 10 that sends command signals to the central processing unit 1 may be any device such as a pocket computer, a computer connected via a telephone line, or other microcomputer.
When using a pocket computer, even people without knowledge of computers, such as engine maintenance personnel and sales personnel, can simply input command signals, making it easy to obtain abnormal state history. Furthermore, when connected via a telephone line or the like, the abnormal state history can be obtained immediately from a remote location. Furthermore, when connecting with other microcomputers to construct an abnormal state management system, the storage unit (for example, magnetic disk) of the main computer (host computer)
Even if the abnormal state history disappears for some reason, the entire abnormal state history in the storage device 6 can be retrieved as shown in FIG.

That is, as shown in step SP10, the central processing unit 1 monitors the input of the command signal from the transfer command device 10, and when the command signal is input via the serial transmission device 9, the central processing unit 1 is command E (step
(See SP11). If the command is not command E, the process ends, but if it is command E, the central processing unit 1 moves to the second pointer inside the storage device 6, as shown in step SP12.
Set the contents of PT2 to the first address of the abnormal status file. Next, as shown in step SP13, it is determined whether the addresses indicated by the second pointer PT2 and the third pointer PT3 inside the storage device 6 match. At this time, the second pointer PT2 and the third pointer
If the addresses indicated by PT3 and PT3 do not match, the step
As shown in SP14, advance the second pointer PT2 by one (update the address), and then proceed to step SP15.
As shown in , the contents of the address indicated by the second pointer PT2 are transferred to the transfer command device 1 via the serial transmission device
Send to 0. Next, return to step SP13,
It is again determined whether the addresses indicated by the second pointer PT2 and the third pointer PT3 match.

In this way, the processes shown in steps SP13 to SP15 are repeated until the addresses indicated by the second pointer PT2 and the third pointer PT3 match, and in FIG. The state history is all transferred to the transfer command device 10 from the beginning to the contents of the address indicated by the third pointer PT3. Then, in step SP13, when the addresses indicated by the second pointer PT2 and the third pointer PT3 match, the central processing unit 1 ends the transfer process. As a result, even if the abnormal state history disappears in the storage unit of the main computer, the storage unit 6
Since the history of abnormal conditions within the device can be easily retrieved, the reliability of the device can be improved.

"Effects of the Invention" As explained above, the present invention includes a plurality of measuring instruments that measure pressure, temperature, rotation speed, etc. of each part of the engine body, and a timing device that detects when an abnormal state occurs in the engine body. , a central processing unit that determines an abnormal state of the engine main body based on the output of each of the measuring devices, and stores the time and abnormality data output by the timing device in a storage device; Since it is equipped with a transfer command device that outputs a command signal to the central processing unit to send the status history via a serial transmission device, it measures the pressure, temperature, rotation speed, etc. of each part of the engine body. Based on the output of the measuring device, the central processing unit determines an abnormal state of the engine body, stores the abnormality data and the time output from the timing device in a storage device, and outputs it to the central processing unit. In response to a command signal from the transfer command device, the abnormal state history stored in the storage device is sent to the transfer command device via the serial transmission device. Records of past abnormal conditions that have occurred can be retrieved quickly and easily, and based on this record of abnormal conditions, statistical judgments, data analysis at abnormal times, etc. can be greatly effective, and the internal combustion engine Reliability can be improved.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a schematic configuration diagram, FIG. 2 is an explanatory diagram showing the contents of an abnormal state file in the storage device 6, and FIG. FIG. 4 is a flowchart illustrating the process of transferring a newly generated abnormal state history. FIG. 4 is a flowchart illustrating the process of transferring all information of the abnormal state file. 1...Central processing unit, 2...Contact detector, 4...
...Measuring instrument, 6...Storage device, 7...Timekeeping device, 9
...Series transmission device, 10...Transfer command device, e,
T, E...Command signals.

Claims (1)

[Claims] 1. A plurality of measuring instruments that measure the pressure, temperature, rotation speed, etc. of each part of the engine main body, a timing device that detects when an abnormal condition occurs in the engine main body, and a measuring device that measures the engine main body based on the output of each of the above measuring instruments. a central processing unit that determines an abnormal state of the clock and stores the time and abnormal data output by the clock device in a storage device; and a command signal that sends the abnormal state history stored in the storage device via a serial transmission device. An abnormality record transmission device for an internal combustion engine, comprising: a transfer index cooling device that outputs the information to the central processing unit.