JP6762191B2 - Engine management system - Google Patents

Description

In the present invention, the management unit that manages the engine displays on the display unit that it is the maintenance time every time the integrated operation index obtained by integrating the operation index related to the actual operation of the engine from the end of maintenance reaches the set maintenance index. The present invention relates to an engine management system configured to execute an engine stop process for executing a display process and stopping the engine when the remaining amount of engine oil of the engine reaches a set lower limit value.

Such an engine management system manages an engine that drives a generator in a combined heat and power system and an engine that drives a compressor in a heat pump device for air conditioning. By displaying the maintenance time on the display unit, engine oil is used. Maintenance such as replacement of the engine will be performed appropriately.
That is, when the maintenance time is displayed on the display unit, the user who uses the combined heat and power supply device or the like contacts the maintenance company and performs maintenance such as replacement of engine oil.

As a conventional example of such an engine management system, an integrated operation time obtained by integrating the operation time as an operation index related to the actual operation of the engine is obtained as an integrated operation index, and the integrated operation time is a set maintenance time as a set maintenance index (for example). When it reaches 4000 hours), it is displayed that it is the maintenance time, that is, it is operating beyond the oil change time, and after that, the set time elapses without changing the engine oil, and the integrated operation is performed. Some are configured to automatically stop the engine when the time reaches the forced stop time (eg, 4100 hours) (eg, Patent Document 1).

In Patent Document 1, when the set time is earlier (3750 hours) than the set maintenance time (4000 hours), a notice is displayed that the oil change time is near, but in recent years, this has been done. In many cases, such a preliminary display is not performed.

Further, although not described in Patent Document 1, the engine management system executes an engine stop process for stopping the engine when the remaining amount of engine oil in the engine reaches a set lower limit value (for example, Patent Document 1). See 2.).
In Patent Document 2, the oil level height of the engine oil stored in the crankcase is detected, and when the oil level reaches the set lower limit level (set lower limit value), the engine is stopped. ing.

Japanese Patent No. 30666123 Japanese Unexamined Patent Publication No. 2005-22869

Generally, the remaining amount of engine oil does not fall below the set lower limit value before the integrated operation index (for example, the integrated operation time) elapses from the set maintenance index (for example, the set maintenance time).
However, if the engine is used for a long period of time, for example, if it is used beyond the design life, the consumption of engine oil will increase due to wear inside the engine, accumulation of combustion residues, etc. Before the operation index (for example, the integrated operation time) reaches the set maintenance index (for example, the set maintenance time), the remaining amount of engine oil may fall below the set lower limit value.

In this way, when the engine is stopped because the remaining amount of engine oil falls below the set lower limit value before the integrated operation index (for example, the integrated operation time) reaches the set maintenance index (for example, the set maintenance time), Since the engine cannot be used until the maintenance is completed, there is an inconvenience that causes inconvenience in use, such as the inability to operate the combined heat and power supply device and the heat pump device driven by the engine.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an engine management system capable of avoiding a trouble that the engine cannot be used due to a decrease in the remaining amount of engine oil. It is in.

In the engine management system of the present invention, the management unit that manages the engine displays that the maintenance time is reached each time the integrated operation index obtained by integrating the operation index related to the actual operation of the engine from the end of maintenance reaches the set maintenance index. It is configured to execute the display process to be displayed on the unit and to execute the engine stop process for stopping the engine when the remaining amount of engine oil of the engine reaches the set lower limit value. The composition is
When the management unit executes the engine stop process before the integrated operation index reaches the set maintenance index, the set maintenance index is used when the engine stop process is executed from the end of the maintenance. The point is that the update process for updating the integrated operation index up to the above to the index value reduced under the set reduction condition is executed.

That is, if the management unit executes the engine stop process before the integrated operation index reaches the set maintenance index, the set maintenance index is used as the integrated operation index from the end of maintenance to the time when the engine stop process is executed. Since the update process for updating to the index value reduced under the set reduction condition is executed, the remaining amount of engine oil may reach the set lower limit value by the time the integrated operation index reaches the set maintenance index. It will be avoided.

That is, if the engine stop process is executed before the integrated operation index reaches the set maintenance index, the set maintenance index is set and the integrated operation index from the end of maintenance to the time when the engine stop process is executed is set. Since it is updated to the index value reduced in step 1, it is possible to prevent the remaining amount of engine oil from reaching the lower limit of the set value until the reduced set maintenance index is reached. The reduction in the engine prevents the engine from becoming unusable.

In short, according to the engine management system of the present invention, it is possible to avoid the occurrence of trouble that the engine cannot be used due to a decrease in the remaining amount of engine oil.

Further, a further characteristic configuration of the engine management system of the present invention is that when the management unit executes the engine stop process before the integrated operation index reaches the set maintenance index, the engine stop process is performed. The point is that the update process is repeated each time it is executed.

That is, if the management unit executes the engine stop process before the integrated operation index reaches the set maintenance index, the update process for updating the set maintenance index is repeated every time the engine stop process is executed. Therefore, even if the consumption of engine oil gradually increases with use, it is possible to prevent the engine from becoming unusable due to a decrease in the remaining amount of engine oil.

In other words, the consumption of engine oil tends to increase with the use of the engine, so even if the set maintenance index is once updated to the decreasing side, by the time the integrated operation index reaches the set maintenance index again. There is a risk that the engine stop process will be executed, but since the set maintenance index is updated to the decreasing side each time the engine stop process is executed, the consumption of engine oil will gradually increase with use. However, it is possible to prevent the engine from becoming unusable due to a decrease in the remaining amount of engine oil.

In short, according to the further characteristic configuration of the engine management system of the present invention, even if the consumption of engine oil gradually increases with use, it is possible to prevent the engine from becoming unusable due to a decrease in the remaining amount of engine oil. it can.

A further characteristic configuration of the engine management system of the present invention is that the management unit is configured to repeat the update process until the set maintenance index reaches the set lower limit index.

That is, by the time the integrated operation index reaches the set maintenance index, the update process executed when the engine stop process is executed is performed until the set maintenance index reaches the set lower limit index.
In other words, if the set maintenance index falls below the set lower limit index, the update process will not be executed.

Therefore, if the engine is used again in this state, there is a high possibility that the engine cannot be used until the integrated operation index reaches the set maintenance index, the engine stop process is executed, and the engine maintenance is completed. Become.

Therefore, the maintenance worker who was contacted by the user explained that if the engine is used again in this state, the engine stop processing will be executed before the integrated operation index reaches the set maintenance index, and the engine is used. Since it is the limit, it is recommended to replace the engine or replace the engine drive device such as the combined heat and power device and heat pump device equipped with the engine.

In short, according to the further characteristic configuration of the engine management system of the present invention, it is possible to avoid continuing to use the engine at the limit of use.

A further characteristic configuration of the engine management system of the present invention is that the operation index is an operation time, the integrated operation index is an integrated operation time, and the set maintenance index is a set maintenance time.

That is, the integrated operation time is obtained as the integrated operation index, and the integrated operation time is compared with the set maintenance time as the set maintenance index.
That is, the operating time as an operating index related to the actual operation of the engine is integrated to obtain the integrated operating time, and this integrated operating time is compared with the set maintenance time.

Since the engine operating time is a value that appropriately indicates the operating performance of the engine, it is possible to appropriately determine the maintenance time according to the operating performance of the engine by comparing the integrated operating time with the set maintenance time. ..

In short, according to the further characteristic configuration of the engine management system of the present invention, it is possible to appropriately determine the maintenance time according to the operating record of the engine.

Further, a further characteristic configuration of the engine management system of the present invention is such that the engine drives a generator.
The operation index is the power generation amount of the generator, the integrated operation index is the integrated power generation amount of the generator, and the set maintenance index is the set maintenance power generation amount.

That is, the integrated power generation amount of the generator driven by the engine is obtained as the integrated operation index, and the integrated power generation amount is compared with the set maintenance power generation amount as the set maintenance index.
That is, the integrated power generation amount is obtained by integrating the power generation amount as an operation index related to the actual operation of the engine, and this integrated power generation amount is compared with the set maintenance power generation amount.

Since the integrated power generation amount of the generator driven by the engine is a value that appropriately indicates the operation record of the engine when the generator is driven by the engine, the integrated power generation amount and the set maintenance power generation amount are compared. As a result, it is possible to appropriately determine the maintenance time according to the operating record of the engine.

In short, according to the further characteristic configuration of the engine management system of the present invention, when the generator is driven by the engine, the maintenance time can be appropriately determined according to the operating record of the engine.

Further, according to a further characteristic configuration of the engine management system of the present invention, the setting reduction condition is a condition for reducing the integrated operation index at a set ratio.

That is, if the engine stop process is executed before the integrated operation index reaches the set maintenance index, the set maintenance index sets the integrated operation index from the end of maintenance to the time when the engine stop process is executed at the set ratio. It will be updated to the reduced index value.

In this way, since the set maintenance index is updated to the index value obtained by reducing the integrated operation index from the end of maintenance to the time when the engine stop process is executed by the set ratio, the set maintenance index value is maintained. The integrated operation index from the end point to the time when the engine stop process is executed can be set to an appropriate value reduced according to the magnitude.

In short, according to the further characteristic configuration of the engine management system of the present invention, the set maintenance index can be set to an appropriate value.

Further, a further characteristic configuration of the energy supply system of the present invention is that the setting reduction condition is a condition for reducing the integrated operation index by the setting index.

That is, if the engine stop process is executed before the integrated operation index reaches the set maintenance index, the set maintenance index sets the integrated operation index from the end of maintenance to the time when the engine stop process is executed for the set index. It will be updated to the reduced index value.

In this way, since the set maintenance index is updated to the index value obtained by reducing the integrated operation index from the end of maintenance to the time when the engine stop processing is executed, the set index value for reducing the set maintenance index. By properly setting, the set maintenance index value can be set to an appropriate value without excess or deficiency.

In short, according to the further characteristic configuration of the engine management system of the present invention, the set maintenance index value can be set to an appropriate value without excess or deficiency.

Schematic configuration of the combined heat and power system Flowchart showing maintenance process Timing chart showing normal regular maintenance Time chart showing updates of set maintenance time Time chart showing updates of set maintenance time

[First Embodiment]
Hereinafter, the engine management system according to the present invention will be described with reference to the drawings.
(Overall configuration of combined heat and power unit)
As shown in FIG. 1, a combined heat and power unit H including a power generation unit Ha and a heat source unit Hb is provided, and the power generation unit Ha includes an engine 1 using fuel gas as fuel and power generation driven by the engine 1. A machine 2 is provided, and the heat source unit Hb includes a hot water storage tank 3 that stores hot water that has recovered the exhaust heat of the engine 1, and an auxiliary heat source that heats the hot water supplied from the hot water storage tank 3 to the hot water consumption unit to an appropriate temperature. The machine 4 is provided.

The cooling water circulation path 5A that recovers the heat generated by the engine 1 with the cooling water, the hot water circulation path 5B that circulates the hot water of the hot water storage tank 3, and the cooling water and the hot water circulation path 5B that circulates the cooling water circulation path 5A are circulated. A heat exchange unit 5C that exchanges heat with hot water is provided.
The cooling water circulation pump Pa is provided in the cooling water circulation passage 5A, and the hot water circulation pump Pb is provided in the hot water circulation passage 5B.

Then, by heating the hot water flowing through the hot water circulation path 5B with the cooling water circulating in the cooling water circulation path 5A, high-temperature hot water is stored in the hot water storage tank 3, and the hot water supply operation or the like is performed using the stored hot water. When the amount of heat stored in the hot water storage tank 3 is insufficient, the auxiliary heat source machine 4 is configured to operate.

The power generation unit Ha is provided with a power generation control unit Ca that controls the operation of the engine 1 and the generator 2, and the heat source unit Hb is provided with a heat source control unit Cb that controls the operation of the heat source unit Hb. The operation control unit C that controls the operation of the combined heat and power supply unit H is composed of a power generation control unit Ca and a heat source control unit Cb.
The power generation control unit Ca and the heat source control unit Cb are configured to freely communicate various types of information, and the power generation control unit Ca and the heat source control unit Cb are given an operation start command, an operation stop command, etc. A remote controller R for instructing various kinds of information is provided.

(About engine management system)
The power generation control unit Ca as a management unit that manages the operation of the engine 1 calculates the integrated operation time UT as an integrated operation index obtained by integrating the operation time as an operation index related to the actual operation of the engine 1 from the end of maintenance. It is configured.
By the way, when the combined heat and power supply unit H is installed for the first time, the integrated operation time UT is required with the installation time as the maintenance end time.

Then, as shown in FIG. 3, the power generation control unit Ca indicates that the maintenance time is reached each time the integrated operation time UT reaches the set maintenance time MT (for example, 6000 hours) as the set maintenance index. Is configured to execute the display process of displaying on the remote controller R as a display unit.
Therefore, when the information indicating that it is the maintenance time is displayed on the remote controller R, the user who uses the combined heat and power supply unit H sees the display and requests the maintenance contractor to perform the maintenance. ..

The maintenance contractor who was requested to perform maintenance performs maintenance work such as engine oil replacement that supplies new engine oil to engine 1 so that it reaches the upper limit value U instead of used old engine oil, and the maintenance work is completed. Then, a reset command is issued to the power generation control unit Ca.
The power generation control unit Ca is provided with a maintenance operation unit (not shown) operated by a maintenance worker, and the above-mentioned reset command is commanded using this maintenance operation unit. Become.

When the power generation control unit Ca is instructed to reset the command, the integrated operation time UT is reset, and the subsequent operation time is integrated as the integrated operation time UT from the end of maintenance.

Further, after the integrated operation time UT reaches the set maintenance time MT, the power generation control unit Ca elapses for the set elapsed time (for example, 200 hours) without performing maintenance, and the integrated operation time UT When the forced stop time ST (for example, 6200 hours) is reached, it indicates that the maintenance engine stop process for forcibly stopping the engine 1 is executed and the engine 1 is forcibly stopped because the maintenance is not performed. The information is configured to be displayed on the remote control R.

Therefore, when the information indicating that the engine 1 has been forcibly stopped is displayed on the remote controller R, the user who uses the combined heat and power supply unit H should see the display and request the maintenance contractor to perform the maintenance. become.
As described above, the maintenance contractor who is requested to perform maintenance performs maintenance work such as engine oil replacement that supplies new engine oil to engine 1 so as to reach the upper limit value U instead of used old engine oil. When the maintenance work is completed, a reset command is issued to the power generation control unit Ca using the above-mentioned maintenance operation unit.

Further, when the remaining amount of engine oil of the engine 1 reaches the set lower limit value D, the power generation control unit Ca executes the engine stop process for stopping the engine 1, and the remaining amount of engine oil reaches the set lower limit value D. Therefore, the remote controller R is configured to display information indicating that the engine 1 has been stopped.

It is configured so that the power generation control unit Ca determines that the remaining amount of engine oil of the engine 1 has reached the set lower limit value D based on the detection information of the oil monitoring sensor 6 (see FIG. 1) equipped in the engine 1. Has been done.
The oil monitoring sensor 6 includes an oil height sensor that detects the oil level of the engine oil stored in the crank case, and an oil pressure in the oil flow path that pumps the engine oil to the oil supply location with an oil pump. A pressure sensor to detect can be used.

That is, when the oil height sensor is used as the oil monitoring sensor 6, if the detected oil height is lower than the set lower limit height, it is determined that the engine oil remaining amount has reached the set lower limit value D. When the pressure sensor is used as the oil monitoring sensor 6, if the detected oil pressure does not reach the set pressure, it can be determined that the remaining amount of engine oil has reached the set lower limit value D.

Therefore, when the information indicating that the engine 1 has been stopped is displayed on the remote controller R, the user who uses the combined heat and power supply unit H looks at the display on the remote controller R and requests the maintenance contractor to perform the maintenance. It will be.
As described above, the maintenance contractor who is requested to perform maintenance performs maintenance work such as engine oil replacement that supplies new engine oil to engine 1 so as to reach the upper limit value U instead of used old engine oil. When the maintenance work is completed, a reset command is issued to the power generation control unit Ca.

Then, as shown in FIG. 4, when the power generation control unit Ca executes the engine stop process before the integrated operation time UT reaches the set maintenance time MT (6000 hours), the set maintenance time MT is set. It is configured to execute an update process for updating the integrated operation time UT from the end of maintenance to the time when the engine stop process is executed to the index value (operation time) reduced under the set reduction condition.
By the way, as the set maintenance time MT is updated, the forced stop time ST is configured to be updated to the time obtained by adding the set elapsed time (for example, 200 hours) to the new set maintenance time MT. There is.

The setting reduction condition is a condition for reducing the integrated operation time UT by a set ratio (10%). Specifically, with respect to the integrated operation time UT from the end of maintenance to the time when the engine stop process is executed. It is configured to update the operating time multiplied by 0.9 to the new set maintenance time MT.
For example, as shown in FIG. 4, when the integrated operation time UT in the error occurrence time when the engine stop processing is executed is 5800 hours, 5220 hours obtained by multiplying 5800 hours by 0.9 is newly set. It will be updated as the maintenance time MT, and the forced stop time ST will be updated to 5420 hours, which is 5220 hours plus the set elapsed time (for example, 200 hours).

Further, if the power generation control unit Ca executes the engine stop process before the integrated operation time UT reaches the set maintenance time MT, it is updated to a new set maintenance time MT every time the engine stop process is executed. It is configured to repeat the update process, and repeats such an update process until the set maintenance time MT reaches the set lower limit time DT (3000 hours) as the set lower limit index.

That is, for example, as shown in FIG. 5, in the first error occurrence time when the engine stop processing is executed for the first time, the set maintenance time MT for the first error required for the first error is larger than the set lower limit time DT. Since it is large, the obtained error first set maintenance time MT is updated to a new set maintenance time MT.

However, in the second error occurrence time when the engine stop processing is executed for the second time, the set maintenance time MT for the second error required for the second error is smaller than the set lower limit time DT, so that the second error is obtained. The set maintenance time MT is not updated to the new set maintenance time MT.

Then, in this embodiment, in such a case, the set lower limit time DT is configured to be updated to the new set maintenance time MT.
Instead of such a configuration, the set maintenance time MT may be continued as it is without being updated.
By the way, with the update of the set maintenance time MT, the forced stop time ST is updated to the time obtained by adding the set elapsed time (for example, 200 hours) to the updated set maintenance time MT.

(Details of maintenance process)
Next, a maintenance process executed by the power generation control unit Ca, that is, a maintenance process that is a process for managing the engine 1, will be described based on the flowchart shown in FIG.
First, the engine 1 is forced by the maintenance engine stop process executed when the integrated operation time UT reaches the forced stop time ST and the engine stop process executed when the remaining amount of engine oil reaches the set lower limit value D. It is determined whether or not the engine is stopped (# 1).

If it is determined in # 1 that the engine 1 is not forcibly stopped, it is determined whether or not the maintenance time is being displayed to indicate that it is the maintenance time on the remote control R (# 2), and the maintenance time If it is determined that is not displayed, whether or not the integrated operation time UT has reached the set maintenance time MT (for example, 6000 hours), that is, the integrated operation time UT is the set maintenance time MT (for example, 6000 hours). Determine if it is greater than (# 3).

When it is determined in # 3 that the integrated operation time UT is larger than the set maintenance time MT (for example, 6000 hours), the maintenance time display for displaying the information indicating the maintenance time on the remote controller R is started. (# 4) Then, it is determined whether or not there is a reset command, that is, whether or not the maintenance work is completed and the reset command is commanded (# 5).

If it is determined in # 5 that a reset command has been issued, the display of the remote controller R is stopped and the process shifts to the process of resetting the integrated operation time UT (# 10), after which the process is different from the maintenance process. It will move to other processing.
That is, when the maintenance worker performs maintenance work such as changing the engine oil and a reset command is issued, the process shifts to # 10, the display of the remote controller R is stopped, and the cost is integrated. The operating time UT will be reset.

If it is determined in # 5 that there is no reset command, whether or not the integrated operation time UT has reached the forced stop time ST (for example, 6200 hours), that is, the integrated operation time UT is the forced stop time ST (for example, 6200 hours). For example, it is determined whether or not it is larger than 6200 hours (# 6).

If it is determined in # 6 that the integrated operation time UT is larger than the forced stop time ST (for example, 6200 hours), the engine stop process for stopping the engine 1 is executed (# 7), and then the engine The process of displaying the information indicating that 1 has been stopped on the remote controller R is executed (# 8).

After that, it is determined whether or not there is a reset command, that is, whether or not the maintenance work is completed and the reset command is commanded (# 9), and if it is determined that there is a reset command, the process of # 10 is performed. The process of stopping the display of the remote control R and resetting the integrated operation time UT is executed, and then the process proceeds to another process different from the maintenance process.
Further, even if it is determined in # 9 that there is no reset command, the process shifts to another process different from the maintenance process.

If it is determined in # 1 above that the engine 1 is being forcibly stopped, the process proceeds to # 9, and if it is determined that a reset command has been issued, the process proceeds to # 10. The process of stopping the display of the remote controller R and resetting the integrated operation time UT is executed.

When it is determined in # 2 above that the maintenance time is being displayed, the process proceeds to # 5, it is determined whether or not there is a reset command, and it is determined that there is a reset command. The process shifts to the process of # 10, the display of the remote controller R is stopped, and the process of resetting the integrated operation time UT is executed.

If it is determined in # 3 that the integrated operation time UT is less than or equal to the set maintenance time MT (for example, 6000 hours), in # 6, the integrated operation time UT is less than or equal to the forced stop time ST (for example, 6200 hours). If it is determined that there is, it will shift to another process other than the maintenance process.

By the way, although omitted in the above description, the power generation control unit Ca performs an engine stop process for stopping the engine 1 when the remaining amount of engine oil of the engine 1 reaches the lower limit of setting D, and the remaining amount of engine oil is the lower limit of setting. The process of displaying the information indicating that the value D has been reached and the engine 1 has been stopped on the remote control R is executed as the maintenance process.
Then, when such a process is executed, as is clear from the above explanation, # 1 determines that the engine 1 is being forcibly stopped, and # 9 determines that there is a reset command. Then, at # 10, the process of stopping the display of the remote controller R and resetting the integrated operation time UT is executed.

Further, although omitted in the above description, when the engine stop process is executed before the integrated operation time UT reaches the set maintenance time MT (6000 hours), the power generation control unit Ca sets the set maintenance time MT. , The set maintenance time MT is set every time the engine stop process is executed to update the integrated operation time UT from the end of maintenance to the time when the engine stop process is executed to the time reduced under the set reduction condition. It is configured to repeat until the lower limit time DT is reached.

[Another Embodiment]
Next, other other embodiments are listed.
(1) In the above embodiment, the operation control unit C that controls the operation of the combined heat and power supply unit H controls the operation of the power generation control unit Ca that controls the operation of the power generation unit Ha and the heat source control unit C that controls the operation of the heat source unit Hb. Although the case of being composed of Cb has been illustrated, the power generation control unit Ca and the heat source control unit Cb may be integrated into one control unit.

(2) In the above embodiment, the case where the power generation unit Ha and the heat source unit Hb are configured as separate units has been illustrated, but the case where the power generation unit Ha and the heat source unit Hb are configured as one unit is implemented. You may.

(3) In the above embodiment, the case where the engine 1 drives the generator 2 of the combined heat and power supply unit H is illustrated, but when the engine 1 drives the compressor of the heat pump device for air conditioning, the engine 1 The same can be applied to various devices including the above.

(4) In the above embodiment, the case where the operation index is the operation time, the integrated operation index is the integrated operation time UT, and the set maintenance index is the set maintenance time MT is illustrated, but the engine 1 is used. When driving the generator 2, the operation index may be the power generation amount kWh, the integrated operation index may be the integrated power generation amount of the generator 2, and the set maintenance index may be the set maintenance power generation amount.
Then, in this case, the setting reduction condition can be implemented in a form in which the integrated operation index is reduced by the set ratio, as in the above embodiment.

(5) In the above embodiment, the setting reduction condition is a condition in which the integrated operation index is reduced by the set ratio, but the setting reduction condition is a condition in which the integrated operation index is reduced by the set index. It may be carried out at.
That is, for example, the integrated operation index is reduced by the set index, for example, the integrated operation time UT is reduced by 200 hours as the set index, and the calculated time is updated as a new set maintenance time MT. It may be carried out in the form of updating the set maintenance index.

It should be noted that the configuration disclosed in the above embodiment (including another embodiment, the same shall apply hereinafter) can be applied in combination with the configuration disclosed in other embodiments as long as there is no contradiction. The embodiments disclosed in the present specification are examples, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

1 Engine Ca Management Unit D Setting lower limit MT Setting maintenance index (Set maintenance time)
UT integrated operation index (integrated operation time)

Claims (7)

The management unit that manages the engine executes a display process that displays on the display unit that it is time for maintenance each time the integrated operation index that integrates the operation index related to the actual operation of the engine from the end of maintenance reaches the set maintenance index. However, it is an engine management system configured to execute an engine stop process for stopping the engine when the remaining amount of engine oil of the engine reaches the set lower limit value.
When the management unit executes the engine stop process before the integrated operation index reaches the set maintenance index, the set maintenance index is used when the engine stop process is executed from the end of the maintenance. An engine management system configured to execute an update process for updating the integrated operation index up to to the index value reduced under the set reduction condition. If the management unit executes the engine stop process before the integrated operation index reaches the set maintenance index, the update process is repeated every time the engine stop process is executed. The engine management system according to claim 1. The engine management system according to claim 2, wherein the management unit is configured to repeat the update process until the set maintenance index reaches the set lower limit index. The engine management system according to any one of claims 1 to 3, wherein the operation index is an operation time, the integrated operation index is an integrated operation time, and the set maintenance index is a set maintenance time. The engine is configured to drive a generator
Any of claims 1 to 3, wherein the operation index is the power generation amount of the generator, the integrated operation index is the integrated power generation amount of the generator, and the set maintenance index is the set maintenance power generation amount. The engine management system according to item 1. The engine management system according to any one of claims 1 to 5, wherein the setting reduction condition is a condition for reducing the integrated operation index at a set ratio. The engine management system according to any one of claims 1 to 5, wherein the setting reduction condition is a condition for reducing the integrated operation index by the setting index.

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