JP2004156516A - Engine trouble diagnosing apparatus and program thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine trouble diagnosing apparatus which early discovers the trouble of an engine, which prevents the engine from being troubled, and which optimizes the disassembling and inspecting intervals of the engine, and to provide an engine trouble diagnosing program. <P>SOLUTION: The engine trouble diagnosing apparatus includes a data receiving means 52 for receiving engine performance data and state data measured at a driving time at a predetermined time interval, a data analyzing means 53 for comparing the data with engine performance data and state information at a normal time stored in advance in an evaluation DB 55 to analyze the performance and the state, and a radio notifying means 54 for radio notifying when the trouble is judged. The means 53 analyzes aging changes of the engine performance data and the state data stored in a time series manner as well, thereby reflecting the analyzed aging change to the decision of the engine disassembling and inspecting time. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an engine failure diagnosis device and an engine failure diagnosis program for monitoring the performance and state of an engine via sensors installed in various parts of the engine.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a failure diagnosis system for a marine engine, there has been known a system that constantly monitors the exhaust gas temperature of an engine and notifies an alarm to a driver when the exhaust gas temperature becomes abnormal. The same applies to lubricating oil pressure, cooling water pressure, and the like (see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-353094
[Problems to be solved by the invention]
However, since each of them has only an alarm generating function, it may lead to serious damage without being noticed. In addition, since the internal state of the engine is not well understood, there is no treatment other than maintenance such as disassembly and inspection when the predetermined time comes, which is inefficient.
[0005]
The present invention has been made in view of the above circumstances, receives the engine performance data and state data measured during operation at regular time intervals, compares the performance with normal data stored in advance in the database, and the performance thereof, and It is an object of the present invention to provide an engine failure diagnosis device and an engine failure diagnosis program which can detect an abnormality of an engine at an early stage and prevent an engine failure by analyzing a state.
In addition, the engine performance data and state data accumulated in time series are analyzed over time to be reflected in the determination of the engine overhaul time, whereby the engine overhaul interval can be optimized. It is another object to provide a failure diagnosis device and an engine failure diagnosis program.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention is an engine failure diagnosis device that monitors the performance and state of an engine via sensors installed in various parts of the engine, and uses engine performance data and state data measured during operation. A data receiving means for receiving data at regular time intervals, a data analyzing means for comparing the performance and state based on engine performance data and state information at normal time stored in advance in a database in advance, and an abnormal Wireless communication means for performing wireless communication when it is determined that
[0007]
According to the present invention, the data analysis means compares the engine performance data and the status information received via the data reception means with the data in a normal state stored in advance in the database to determine the performance and the status. Analyzing and, depending on the result, notifying abnormalities via the wireless reporting means can secure human life, especially for marine engines, and prevent engine failure due to early detection of engine abnormalities. An engine failure diagnosis device can be provided.
[0008]
Further, in the present invention, the data analysis means sets an upper limit value and a lower current value as a threshold value for determining an abnormality in the exhaust temperature with respect to the number of revolutions and the engine output for each engine, and the measured exhaust temperature is set to the upper limit value. It is characterized in that an abnormality is analyzed when the value exceeds a range set by the lower limit value.
According to the present invention, there is provided an engine failure diagnosis device capable of detecting an abnormality of an engine at an early stage and preventing an engine failure from occurring by providing a threshold value range for an abnormality determination with upper and lower limits. can do.
[0009]
Further, the present invention is characterized in that the engine output is calculated by creating a PV diagram by measuring a cylinder temperature and a cylinder pressure via respective sensors.
According to the present invention, by calculating the engine output from the PV diagram, it is possible to substitute the engine output which is difficult to measure.
[0010]
Further, in the present invention, the data analysis means analyzes the time-dependent changes of the engine performance data and the state data accumulated in time series to reflect the results in the determination of the engine overhaul inspection time.
Advantageous Effects of Invention According to the present invention, by analyzing changes over time of engine performance data and state data accumulated in chronological order, it is possible to optimize the engine overhaul interval by reflecting it in the determination of the engine overhaul time. It is possible to provide an encidin failure diagnosis device capable of performing the above.
[0011]
In order to solve the above-described problems, the present invention is an engine failure diagnosis program used in an engine failure diagnosis device that monitors the performance and state of an engine via sensors installed in various parts of the engine, and is measured during operation. Receiving the engine performance data and state data at regular time intervals, analyzing the performance and state based on the engine performance data and state information at normal time stored in advance in the database, and analyzing the state; As a result, when it is determined that there is an abnormality, the step of making a wireless report is performed by the computer.
[0012]
According to the present invention, by causing the computer to execute the engine failure diagnosis program described above, the engine performance data and state information are compared with the normal data stored in advance in the database to analyze the performance and state. Depending on the result, by reporting the abnormality, it is possible to secure human life, particularly in the case of a ship engine, and to prevent engine failure due to early detection of an abnormality in the engine.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a diagram cited for explaining a system configuration of an engine failure diagnosis system to which the engine failure diagnosis device of the present invention is connected.
In FIG. 1, reference numeral 1 denotes a small computer mounted on a ship, which includes a data logger 2 as a peripheral device. Reference numeral 3 denotes various sensors installed at various locations of the marine engine, which measure exhaust temperature, engine speed, supply air temperature, rack position of the fuel injection pump, lubricating oil temperature, and pressure, respectively. The temperature is measured by a temperature sensor such as a thermocouple, the pressure is measured by a pressure sensor, and the position is measured by a position sensor. The various data measured here are taken in by the data logger 2, A / D (Analog-Digital) converted, and then transferred to the small-sized computer 1.
[0014]
Note that the small computer 1 and the data logger 2 in FIG. 1 may be replaced with a wireless tag incorporating a CPU, a data memory, and a wireless transmission / reception circuit. In this case, the driver mounts the above-described wireless tag at a location where the various sensors 3 are installed, and relays the measurement data to and from the management server 5. It is necessary to carry a portable terminal such as Personal Digital Assistants or wear a wearable computer.
[0015]
The small-sized computer 1 is further connected to a management server 5 installed at a fishing port or an engine sales agency via an IP network 4. The management server 5 receives the measurement information from the various sensors 3 transmitted from the small-sized onboard computer 1 and compares it with the normal performance data and state data stored in the database. Make a decision.
The result is transmitted to the serviceman PC 6 carried by the serviceman via the LAN (Local Area Network) 7 and, when the engine is abnormal, an alarm is immediately transmitted to the driver wirelessly.
[0016]
FIG. 2 is a block diagram showing the internal configuration of the engine failure diagnosis device of the present invention mounted on the management server 5 shown in FIG.
The engine failure diagnostic device according to the present invention includes a communication interface unit 51, a data receiving unit 52, a data analyzing unit 53, a wireless reporting unit 54, and an evaluation database (DB) 55.
The communication interface unit 51 manages an interface with the onboard small computer 1, and here is connected via the IP network 4, so that a TCP / IP (Transmission Control Protocol / Internet Protocol) is implemented. The data receiving unit 52
It has a function of receiving engine performance data and state data measured via various sensors 3 at the time of operation at regular time intervals, and each data received here is transferred to the data analysis unit 53.
[0017]
The data analysis unit 53 has a function of comparing engine performance data (performance value) and state information (state value) in a normal state stored in the evaluation DB 55 in advance and analyzing the performance and state.
The evaluation DB 55 stores, as data, maps of the output with respect to the number of revolutions during normal operation, the exhaust gas temperature, and the like, obtained by experiments, for each model of the engine. Specifically, a threshold value for abnormality determination regarding the exhaust gas temperature is stored. An upper limit value and a lower current value are set as the threshold value, and the data analysis unit 53 determines when the exhaust gas temperature measured via the various sensors 3 exceeds the range set by the upper and lower limit values. Analyze abnormally. The engine output may be calculated by creating a PV diagram (indicator diagram P: pressure V: volume) by measuring the cylinder temperature and the cylinder pressure via respective sensors. .
[0018]
The data analysis unit can also analyze the time-dependent changes in the engine performance data and the status data accumulated in time series to reflect the results in the determination of the engine overhaul time.
Note that the wireless reporting unit 54 has a function of immediately reporting wirelessly to the driver when the data analyzing unit 53 determines that there is an abnormality.
[0019]
3 and 4 are diagrams cited for explaining the operation of the embodiment of the present invention, and show a processing flowchart of the engine failure diagnosis program (FIG. 3) and an example of data analysis (FIG. 4), respectively.
Hereinafter, the operation of the engine failure diagnosis device of the present invention shown in FIG. 1 will be described in detail with reference to FIGS.
[0020]
The onboard computer 1 measures engine performance data such as exhaust temperature and engine speed, and engine state data such as fuel injection pump rack position and lubricating oil temperature by various sensors 3, and captures them via the data logger 2. Then, the data acquired through the IP network 4 is transferred to the engine failure diagnosis device 3 which is sold and installed in a fishing port or an agency. The transferred data can be browsed by a terminal such as an in-house LAN 7, a serviceman PC 6 connected via the IP network 4, or a mobile phone having a built-in browser.
In the engine failure diagnosis device 3, these data are received by the data receiving unit 32 via the communication interface unit 31 and transferred to the data analyzing unit 53. The data analysis unit 53 captures these engine performance data and state data measured during operation at regular time intervals (S31, S32), compares them with the normal engine performance data and state information stored in the evaluation DB 55, and compares their performance. , And the state are analyzed (S33). FIG. 4 shows an example of data analysis by the data analysis unit 53.
[0021]
FIG. 4A is an engine performance graph in which the horizontal axis represents the engine speed, and the vertical axis represents the engine output and the exhaust temperature.
Here, the change in the exhaust temperature will be described. In the drawing, in addition to the change in the exhaust temperature with respect to the engine speed and the engine output, a threshold for determining an abnormality is hatched. An upper limit value UL and a lower current value LL are set as the threshold value, and the data analyzer 53 determines when the exhaust gas temperature measured via the various sensors 3 exceeds the range set by the upper and lower limit values. Analyze abnormally. Note that CT is an absolute limit temperature.
Regarding the setting of the threshold value, it is possible to make an accurate abnormality judgment according to the use environment by reflecting it in the evaluation according to the state of the engine use environment such as the atmospheric pressure, humidity, temperature, etc. without fixedly determining the range. Become.
[0022]
FIG. 4B is a graph cited for explaining the time of replacing the bearing, with the horizontal axis representing time t and the vertical axis representing the bearing temperature. Here, the data analysis unit 53 analyzes the time-dependent change of the bearing temperature accumulated in a time series to reflect the change in the engine overhaul inspection time. That is, as is clear from the figure, it can be seen that the temperature change is constantly observed from a certain time (point a) and exceeds a threshold value for component replacement from a certain time (point b).
By reflecting the analysis result in the determination of the engine disassembly inspection time, useless inspection or replacement can be prevented. As is well known, the bearing is a component that requires the most trouble to replace, and by evaluating and analyzing the bearing, useless replacement work can be avoided.
If the data analysis unit 53 determines that the data is abnormal, the driver is immediately notified of the alarm via the wireless communication unit 53 (S34). In addition, the information is also reported to the serviceman PC 6 via the IP network 4 via the communication interface unit 51. At this time, the current position information of the vessel measured by GPS (Global Positioning System) or the like is also notified. Thus, the rescue operation in the event of an unexpected situation such as drifting due to the stop of the engine can be smoothly performed.
[0023]
As described above, the present invention is to receive engine performance data and state data measured at the time of operation at regular time intervals, compare them with data in a normal state previously stored in a database, and analyze the performance and state. The engine malfunction is detected early and the engine failure is prevented beforehand. The engine performance data and the state data accumulated in time series are analyzed to determine the engine overhaul time. In order to optimize the interval of engine overhaul by reflecting it in the decision.
In the embodiment of the present invention described above, only the marine engine has been described, but the present invention can be similarly applied to a power generating engine. The power generation engine is different from the marine engine in that the load changes depending on the required power generation amount at a constant rotation speed and the exhaust gas is already established. However, the same analysis can be performed by measuring performance data according to the load of the engine and information such as the temperature, pressure, exhaust gas concentration and the like of each part of the engine and comparing the measured data with regulation data and the like stored in a database.
[0024]
In addition, the procedure executed by each of the communication interface unit 51, the data receiving unit 52, the data analyzing unit 53, and the wireless reporting unit 54 shown in FIG. 2 is recorded on a computer-readable recording medium, and recorded on this recording medium. The engine failure diagnosis device of the present invention is realized by causing a computer system to read and execute the program. The computer system here includes an OS and hardware such as peripheral devices.
[0025]
The “computer system” also includes a homepage providing environment (or a display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in a computer system. Further, the “computer-readable recording medium” is a system such as a volatile memory (RAM) in a computer system which is a client when a program is transmitted through a network such as the Internet or a communication line such as a telephone line. In addition, programs that hold programs for a certain period of time are also included.
[0026]
Further, the above program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting a program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
Further, the program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.
[0027]
As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments, and includes a design and the like within a range not departing from the gist of the present invention.
[0028]
【The invention's effect】
As described above, according to the present invention, engine performance data and state data are compared with experimental value data stored in advance in an evaluation DB, and analyzed, whereby an engine abnormality can be discovered early. It is possible to prevent failure. As a result, drifting on the sea can be prevented, and the rescue of personal names is possible.
Further, by storing the above-mentioned data in time series and analyzing the history thereof, the interval of engine overhaul and inspection can be optimized, which also contributes to a reduction in maintenance costs. Further, it can also assist in finding the cause of the failure. As described above, there is a user merit from the viewpoint of securing human life and reducing maintenance costs, and a maker's merit arises from the viewpoint of investigating the cause of a failure and clarifying the location of responsibility.
[Brief description of the drawings]
FIG. 1 is a diagram cited for explaining a system configuration of an engine failure diagnosis system to which an engine failure diagnosis device of the present invention is connected.
FIG. 2 is a block diagram showing the internal configuration of an engine failure diagnosis device of the present invention mounted on the management server shown in FIG.
FIG. 3 is a diagram cited for explaining the operation of the embodiment of the present invention, and is a processing flowchart of an engine failure diagnosis program.
FIG. 4 is a diagram cited for explaining the operation of the embodiment of the present invention, and is a graph showing an example of data analysis.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Onboard small computer 2 Data logger 3 Various sensors 4 IP network 5 Management server 6 Serviceman PC
7 In-house LAN
51 communication interface unit 52 data receiving unit 53 data analyzing unit 54 wireless reporting unit 55 evaluation DB

Claims (5)

An engine failure diagnostic device that monitors the performance and state of the engine via sensors installed in various parts of the engine,
Data receiving means for receiving engine performance data and state data measured during operation at regular time intervals,
Data analysis means for comparing and comparing the performance and state based on engine performance data and state information at normal time previously stored in the database,
Radio reporting means for performing radio reporting when it is determined that the data analysis means is abnormal,
An engine failure diagnostic device comprising: The data analysis means,
When an upper limit and a lower current value are set as a threshold value for determining an abnormality in the exhaust temperature with respect to the engine speed and the engine output, when the measured exhaust temperature exceeds the range set by the upper and lower limits. The engine failure diagnosis apparatus according to claim 1, wherein the failure is analyzed. The engine failure diagnosis device according to claim 2, wherein the engine output is calculated by creating a PV diagram by measuring a cylinder temperature and a cylinder pressure via respective sensors. . The data analysis means,
2. The engine failure diagnosis apparatus according to claim 1, wherein the engine performance data and the state data accumulated in a time series are analyzed with time to reflect the results in determining an engine overhaul time. An engine failure diagnosis program used for an engine failure diagnosis device that monitors the performance and state of the engine via sensors installed in various parts of the engine,
Receiving at regular time intervals engine performance data and state data measured during operation;
Analyzing the performance and state by comparing based on the engine performance data and state information at normal time stored in the database in advance,
As a result of the analysis, the step of performing a wireless notification when it is determined to be abnormal,
Engine failure diagnosis program that makes a computer execute the program.

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