JP6399703B2 - Fuel consumption estimation device, fuel consumption estimation method and program - Google Patents

Description

  The present invention relates to a fuel consumption estimation device, a fuel consumption estimation method, and a program.

There is a technique for displaying the remaining amount of fuel in a ship on a scale.
Patent Document 1 describes a technique for calculating and displaying a navigable distance based on the remaining amount of fuel in a ship as a related technique.

JP 2008-254473 A

  By the way, generally, the remaining amount of fuel in the ship is only roughly displayed on a scale, and it is difficult to accurately grasp the remaining amount of fuel in the ship. Further, in a ship that does not include a fuel flow meter and does not use an electronically controlled injection device, it may be difficult to calculate fuel consumption.

  Therefore, an object of the present invention is to provide a fuel consumption estimation device, a fuel consumption estimation method, and a program that can solve the above-described problems.

  According to the first aspect of the present invention, the fuel consumption estimation device includes a rotation speed acquisition unit that acquires a current engine rotation speed of an engine used in a ship, the acquired engine rotation speed, and the current engine rotation speed. An output estimating unit for estimating a current engine output value based on a boost pressure indicating a pressure of compressed air generated by a supercharger based on an exhaust gas of the engine, the current engine output value and the current engine A fuel consumption estimation unit that estimates the current fuel consumption per unit time based on the number of revolutions, and a display control unit that performs control to display the current fuel consumption per unit time on the display unit, Prepare.

  According to the second aspect of the present invention, in the fuel consumption estimation device described above, the output estimation unit is based on a comparison result between a physical quantity of an output fluctuation element that fluctuates the current engine output value and a threshold value. An engine output correction value for the current engine output value is specified, and the current engine output value is estimated based on the engine output correction value, the current engine speed, and the current boost pressure. .

  According to the third aspect of the present invention, in the fuel consumption estimation apparatus described above, the output estimation unit identifies the output fluctuation element according to the type of the input ship, and the physical quantity of the output fluctuation element The engine output correction value for the current engine output value is specified based on the comparison result between the threshold value and the threshold value.

  According to a fourth aspect of the present invention, in the fuel consumption estimation apparatus, the fuel consumption estimation unit includes a physical quantity and a threshold value of a consumption fluctuation element that fluctuates the current fuel consumption per unit time. The fuel consumption correction value for the current fuel consumption per unit time is identified based on the comparison result, and the fuel consumption correction value, the current engine output value, and the current engine speed Based on the above, the current fuel consumption per unit time is estimated.

  According to a fifth aspect of the present invention, in the fuel consumption estimation device, the fuel consumption estimation unit specifies the consumption variation element according to the type of the input ship, and the consumption A fuel consumption correction value for the current fuel consumption per unit time is specified based on the comparison result between the physical quantity of the variable element and the threshold value.

  According to the sixth aspect of the present invention, in the fuel consumption estimation apparatus described above, the display control unit displays cost information calculated based on the fuel consumption per unit time and the unit price of fuel on the display unit. Control the display.

  According to the seventh aspect of the present invention, in the fuel consumption estimation method, the rotation speed acquisition unit acquires a current engine rotation speed of an engine used in the ship, and the output estimation unit acquires the acquired engine rotation speed. The current engine output value is estimated based on the current number and the boost pressure indicating the pressure of the compressed air generated by the supercharger based on the current engine exhaust gas, and the fuel consumption estimation unit The fuel consumption per unit time is estimated based on the engine output value and the current engine speed, and the display control unit controls the display unit to display the current fuel consumption per unit time. I do.

  According to an eighth aspect of the present invention, the program causes the computer to acquire a current engine speed of an engine used in the ship, the acquired engine speed, and the current engine speed. Output estimating means for estimating a current engine output value based on a boost pressure indicating a pressure of compressed air generated by the supercharging device based on exhaust gas, the current engine output value and the current engine speed The fuel consumption amount estimating means for estimating the current fuel consumption amount per unit time, and the display control means for performing control for displaying the current fuel consumption amount per unit time on the display unit.

  According to the fuel consumption estimation apparatus according to the embodiment of the present invention, in the ship where only the fuel remaining amount in the ship is roughly displayed, the fuel flow meter is not provided, and the electronically controlled injector is not used. The current fuel consumption per unit time can be estimated.

It is a figure which shows the function structure with which the ship by one Embodiment of this invention is provided. It is a figure which shows the graph which shows the correspondence of the engine speed, boost pressure, and engine output value by one Embodiment of this invention. It is a figure which shows the data table which shows the correspondence of the engine speed, boost pressure, and engine output value by one Embodiment of this invention. It is a figure which shows the data table which shows the correction value of the engine output value by one Embodiment of this invention. It is a figure which shows the graph which shows the correspondence of the engine speed by one Embodiment of this invention, an engine output value, and fuel consumption. It is a figure which shows the data table which shows the correspondence of the engine speed by one Embodiment of this invention, an engine output value, and fuel consumption. It is a figure which shows the data table which shows the correction value of the fuel consumption per unit time by one Embodiment of this invention. It is a figure which shows the score area | region for calculating the score which shows the index of the driving | operation of the low fuel consumption by one Embodiment of this invention. It is a figure which shows the screen which a display part displays based on the control which the display control part by one Embodiment of this invention performs. It is a figure which shows the relationship between the score which shows the index of the driving | operation of the low fuel consumption by one Embodiment of this invention, and the number of bars. It is a figure which shows the processing flow of the fuel consumption estimation apparatus by one Embodiment of this invention.

<Embodiment>
Hereinafter, embodiments will be described in detail with reference to the drawings. The fuel consumption in the figure has the same meaning as the fuel consumption.
A functional configuration of a ship such as a fuel consumption estimation device according to an embodiment of the present invention will be described.
As shown in FIG. 1, in the present embodiment, the ship 1 includes an engine 10, a fuel consumption amount estimation device 20, a display unit 30, and a storage unit 40.

The engine 10 includes a pickup sensor 101, a supercharging device 102, and a pressure sensor 103.
The pickup sensor 101 detects the rotation speed of the engine 10.
The supercharging device 102 generates compressed air using the exhaust gas of the engine 10 as a power source. The supercharger 102 supplies the generated compressed air to the engine 10 and increases the substantial displacement of the engine 10.
The pressure sensor 103 detects the pressure of the compressed air that the supercharger 102 supplies to the engine 10. The pressure of the compressed air that the supercharging device 102 supplies to the engine 10 is called boost pressure.

The fuel consumption amount estimation apparatus 20 includes a rotation speed acquisition unit 201, an output estimation unit 202, a fuel consumption amount estimation unit 203, and a display control unit 204.
The rotation speed acquisition unit 201 acquires the current engine rotation speed of the engine 10 used in the ship 1. Specifically, the rotation speed acquisition unit 201 acquires the current rotation speed of the engine 10 detected by the pickup sensor 101 from the pickup sensor 101.

The output estimation unit 202 determines the current engine output based on the engine speed acquired by the speed acquisition unit 201 and the boost pressure of the compressed air generated by the supercharger 102 based on the exhaust gas of the current engine 10. Estimate the value.
Further, the output estimation unit 202 identifies an engine output correction value for the current engine output value based on a comparison result between a physical quantity of an output fluctuation element that varies the current engine output value and a threshold value. Then, the output estimation unit 202 estimates the current engine output value based on the specified engine output correction value, the current engine speed, and the current boost pressure.
Moreover, the output estimation part 202 specifies an output fluctuation element according to the classification of the ship 1 input. The output estimation unit 202 specifies an engine output correction value for the current engine output value based on the comparison result between the physical quantity of the specified output fluctuation element and the threshold value. The output estimation unit 202 corrects the engine output value using the specified engine output correction value.

The fuel consumption amount estimation unit 203 estimates the current fuel consumption amount per unit time based on the current engine output value and the current engine speed.
The fuel consumption estimation unit 203 also calculates the fuel for the current fuel consumption per unit time based on the comparison result between the physical quantity of the consumption fluctuation element that changes the current fuel consumption per unit time and the threshold value. Specify the consumption correction value. The fuel consumption amount estimation unit 203 estimates the current fuel consumption amount per unit time based on the specified fuel consumption amount correction value, the current engine output value, and the current engine speed.
Further, the fuel consumption amount estimation unit 203 specifies a consumption amount variation element according to the input type of the ship 1. The fuel consumption amount estimation unit 203 specifies a fuel consumption amount correction value for the current fuel consumption amount per unit time based on the comparison result between the physical amount of the specified consumption amount variation factor and the threshold value. The fuel consumption amount estimation unit 203 corrects the fuel consumption amount per unit time using the specified fuel consumption amount correction value.

  The display control unit 204 calculates cost information based on the fuel consumption per unit time estimated by the fuel consumption estimation unit 203 and the unit price of fuel. For example, the display control unit 204 calculates the fuel cost for the integrated value of the fuel consumption by multiplying the fuel consumption by the unit price of the fuel.

  Further, the display control unit 204 calculates the ship speed of the ship 1. For example, the display control unit 204 calculates the ship speed of the ship 1 based on the amount of change per unit time of the current position of the ship 1 input from a GPS (Global Positioning System) 50.

  Further, the display control unit 204 integrates the fuel consumption per unit time input from the fuel consumption estimation unit 203, and calculates the average fuel consumption by dividing by the integration time. The display control unit 204 newly calculates the average fuel consumption after the reset every time the user resets the average fuel consumption.

  Further, the display control unit 204 calculates the current time. For example, the display control unit 204 counts the number of oscillations of the oscillator using the crystal oscillator from the reference time, and calculates the time obtained by adding the time corresponding to the number of oscillations counted at the reference time as the current time.

  Further, the display control unit 204 calculates an estimated arrival time. For example, the display control unit 204 calculates the distance from the current position to the target position from the target position input by the user and the current position input from the GPS 50. Then, the display control unit 204 calculates the estimated arrival time from the present by dividing the calculated distance by the current boat speed.

  Further, the display control unit 204 calculates the voyage distance by integrating the amount of change in position per unit time from the departure position to the current position based on the current position input from the GPS 50.

  The display control unit 204 also calculates the total fuel consumption by integrating the fuel consumption per unit time estimated by the fuel consumption estimation unit 203, and subtracts the total fuel consumption from the fuel amount at the start of voyage. . The display control unit 204 calculates the navigable distance by dividing the total fuel consumption by the instantaneous fuel consumption and multiplying by the boat speed.

  In addition, the display control unit 204 integrates the fuel consumption per unit time input from the fuel consumption estimation unit 203 to calculate a fuel consumption integrated value. The display control unit 204 newly calculates the fuel consumption integrated value after the reset every time the user resets the fuel consumption integrated value.

  The display control unit 204 also displays a score indicating an index of low fuel consumption driving determined based on the current engine output value of the engine 10, the current engine speed of the engine 10, and the boost pressure of the engine 10. calculate.

  Further, the display control unit 204 calculates the maintenance time for each maintenance item based on the accumulated operation time.

  In addition, the display control unit 204 performs control for causing the display unit 30 to display the engine rotational speed input from the rotational speed acquisition unit 201. In addition, the display control unit 204 performs control to display the engine output value input from the output estimation unit 202 on the display unit 30. Further, the display control unit 204 performs control to display the instantaneous fuel consumption calculated based on the current fuel consumption per unit time input from the fuel consumption estimation unit 203 on the display unit 30. In addition, the display control unit 204 operates the calculated ship speed, average fuel consumption from the time of reset to the present, current time, estimated arrival time, voyage distance, navigable distance, fuel consumption integrated value, and low fuel consumption operation. The display unit 30 is controlled so as to display a score indicating the index.

The display unit 30 displays cost information calculated based on the fuel consumption per unit time and the unit price of fuel based on the control by the display control unit 204.
The storage unit 40 stores various information necessary for processing performed by the fuel consumption estimation device 20.
The GPS 50 outputs information related to the position of the ship 1 to the display control unit 204.

Next, the estimation of the current engine output value performed by the output estimation unit 202 according to the present embodiment will be described.
The output estimation unit 202 estimates the current engine output value using the correspondence relationship between the engine speed, the boost pressure, and the engine output value for each type of the ship 1 as shown in FIG. Specifically, the output estimation unit 202 inputs the engine speed from the rotation speed acquisition unit 201. The output estimation unit 202 acquires the current boost pressure from the pressure sensor 103. The output estimation unit 202 reads, for example, the data table TBL1 shown in FIG. 3 obtained by converting the graph shown in FIG. The data table TBL1 includes data indicating a correspondence relationship between the engine speed, the boost pressure, and the engine output value for each type of the ship 1.

  The output estimation unit 202 specifies the same data as the engine speed input from the rotation speed acquisition unit 201 in the data table TBL1 read from the storage unit 40. For example, when the engine speed input from the rotation speed acquisition unit 201 is 1500 [rpm], the output estimation unit 202 sets 1500 [rpm] as the input engine speed and the engine speed in the data table TBL1 shown in FIG. Compare the numbers in order. Then, the output estimation unit 202 identifies data numbers 3400 to 3700 having engine speeds that match the input engine speed 1500 [rpm] in the data table TBL1.

  The output estimation unit 202 specifies the same data as the boost pressure acquired from the pressure sensor 103 in the specified data number. For example, when the data numbers specified for the engine speed input by the output estimation unit 202 are the data numbers 3400 to 3700 shown in FIG. 3 and the boost pressure acquired from the pressure sensor 103 is 0.1 [MPa]. The output estimating unit 202 compares the boost pressure acquired from the pressure sensor 103 of 0.1 [MPa] with the boost pressure in the data numbers 3400 to 3700 in order. The output estimation unit 202 identifies the data number 3504 having a boost pressure that matches the boost pressure 0.1 [MPa] acquired from the pressure sensor 103 in the data numbers 3400 to 3700. Then, the output estimation unit 202 estimates the engine output value 460 [PS] in the data number 3504 as the current engine output value.

  The output estimation unit 202 specifies a data number that matches the engine speed input from the rotation speed acquisition unit 201 after specifying the data number that matches the boost pressure acquired from the pressure sensor 103 in the data table TBL1. The current engine output value may be estimated.

  In addition, the output estimation unit 202, when there is no data in the data table TBL1 that matches the engine speed input from the rotation speed acquisition unit 201 or the boost pressure acquired from the pressure sensor 103, the engine input from the rotation speed acquisition unit 201 Data may be generated by performing interpolation calculation using data of data numbers including values before and after the boost pressure acquired from the rotational speed and the pressure sensor 103. For example, the engine speed input by the output estimation unit 202 from the rotation speed acquisition unit 201 is specified as data numbers 3400 to 3700 shown in FIG. 3 for 1500 [rpm], and the boost pressure acquired from the pressure sensor 103 is 0. In the case of 09 [MPa], the output estimation unit 202 linearly interpolates the engine output values of the data number 3503 and the data number 3504 including the values before and after the boost pressure acquired from the pressure sensor 103, and the engine of 425 [PS]. Generate and estimate the output value.

Next, correction of the current engine output value performed by the output estimation unit 202 according to the present embodiment will be described.
The output estimation unit 202 reads, for example, the data table TBL2 illustrated in FIG. 4 from the storage unit 40. In the data table TBL2, the combination of a plurality of fluctuation elements of the engine output value and the engine output correction value for each fluctuation element of the engine output value are different for each type of the ship 1.
The output estimation unit 202 identifies the fluctuation element of the engine output value according to the type of the input ship 1. The output estimation unit 202 specifies the engine output correction value for the current engine output value based on the comparison result between the physical quantity of the variable element of the specified engine output value and the threshold value. For example, the output estimation unit 202 uses the data table TBL2 and when the ship 1 is a ship type 1, the engine output value variation factors are exhaust gas temperature, cooling water temperature, lubricating oil pressure, intake air temperature, and intake air. The air humidity, the atmospheric pressure, the supply air temperature, the lubricating oil temperature, the cooling seawater temperature, the turbocharger rotation speed, the in-cylinder pressure, the exhaust back pressure, the exhaust gas concentration, the exhaust gas amount, the NOx value, and the type of lubricating oil are specified. Then, the output estimation unit 202 outputs the engine output correction values (a1, b1, c1, d1, e1, f1, g1, h1, i1, j1, k1, l1, m1, n1, o1, p1) is specified. Then, the output estimation unit 202 corrects the engine output value using the specified engine output correction value.
Specifically, when the exhaust gas temperature x1 measured by the exhaust gas thermometer is higher than the threshold value, the output estimation unit 202 is the specified engine output correction value for the ship type 1 exhaust gas temperature. The engine output value is corrected to be high using a1. Further, when the exhaust gas temperature x1 measured by the exhaust gas thermometer is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value a1.

  Further, when the cooling water temperature x2 measured by the cooling water thermometer is higher than the threshold value, the output estimation unit 202 uses b1 that is the specified engine output correction value for the cooling water temperature of the ship type 1. Correct the engine output value higher. Further, when the coolant temperature x2 measured by the coolant thermometer is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value b1.

  Further, when the lubricating oil pressure x3 measured by the lubricating oil pressure gauge is higher than the threshold value, the output estimating unit 202 uses c1 which is the specified engine output correction value for the lubricating oil pressure of the ship type 1. Correct the engine output value higher. Further, when the lubricating oil pressure x3 measured by the lubricating oil pressure gauge is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value c1.

  Further, when the intake air temperature x4 measured by the intake air thermometer is higher than the threshold value, the output estimating unit 202 uses d1 that is the specified engine output correction value for the intake air temperature of the ship type 1. Correct the engine output value. Further, when the intake air temperature x4 measured by the intake air thermometer is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be high using the specified engine output correction value d1.

  Further, when the intake air humidity x5 measured by the intake air hygrometer is higher than the threshold value, the output estimation unit 202 uses e1 which is the specified engine output correction value for the intake air humidity of the ship type 1. Correct the engine output value. Further, when the intake air humidity x5 measured by the intake air hygrometer is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be high using the specified engine output correction value e1.

  Further, when the barometric pressure x6 measured by the barometer is higher than the threshold value, the output estimating unit 202 lowers the engine output value using f1 which is the specified engine output correction value for the barometric pressure of the ship type 1. to correct. Further, when the barometric pressure x6 measured by the barometer is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be high using the specified engine output correction value f1.

  Further, when the supply air temperature x7 measured by the supply air thermometer is higher than the threshold value, the output estimation unit 202 uses g1 that is the specified engine output correction value for the supply air temperature of the ship type 1. Correct the engine output value. Further, when the supply air temperature x7 measured by the supply air thermometer is lower than the threshold value, the output estimation unit 202 corrects the engine output value to be high using the specified engine output correction value g1.

  Further, when the lubricating oil temperature x8 measured by the lubricating oil thermometer is higher than the threshold value, the output estimating unit 202 uses h1 that is the specified engine output correction value for the lubricating oil temperature of the ship type 1. Correct the engine output value higher. Further, when the lubricating oil temperature x8 measured by the lubricating oil thermometer is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value h1.

  Further, when the cooling seawater temperature x9 measured by the cooling seawater thermometer is higher than the threshold value, the output estimation unit 202 uses i1 that is the specified engine output correction value for the cooling seawater temperature of the ship type 1. Correct the engine output value. Further, when the cooling seawater temperature x9 measured by the cooling seawater thermometer is lower than the threshold value, the output estimation unit 202 corrects the engine output value to be high using the specified engine output correction value i1.

  Further, when the supercharger rotation speed x10 measured by the supercharger tachometer is higher than the threshold value, the output estimation unit 202 determines the specified engine output correction for the supercharger rotation speed of the ship type 1 Using the value j1, the engine output value is corrected to be high. Further, when the supercharger rotation speed x10 measured by the supercharger tachometer is lower than the threshold value, the output estimation unit 202 corrects the engine output value to be low using the specified engine output correction value j1. To do.

  Further, when the in-cylinder pressure x11 measured by the in-cylinder pressure gauge is higher than the threshold value, the output estimation unit 202 uses the engine output correction value k1 specified for the in-cylinder pressure of the ship type 1 to output the engine output. Correct the value higher. Further, when the in-cylinder pressure x11 measured by the in-cylinder pressure gauge is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value k1.

  Further, when the exhaust back pressure x12 measured by the exhaust back pressure gauge is higher than the threshold value, the output estimating unit 202 uses the engine output correction value l1 specified for the exhaust back pressure of the ship type 1 to output the engine output value. Is increased. Further, when the exhaust back pressure x12 measured by the exhaust back pressure gauge is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value l1.

  Further, when the exhaust gas concentration x13 measured by the exhaust gas concentration meter is higher than the threshold value, the output estimating unit 202 uses the engine output correction value m1 specified for the exhaust gas concentration of the ship type 1 to specify the engine. Correct the output value higher. Further, when the exhaust gas concentration x13 measured by the exhaust gas concentration meter is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be high using the specified engine output correction value m1.

  Further, when the exhaust gas amount x14 measured by the exhaust gas meter is higher than the threshold value, the output estimating unit 202 uses the engine output correction value n1 specified for the exhaust gas amount of the ship type 1 to determine the engine output value. Correct higher. Further, when the exhaust gas amount x14 measured by the exhaust gas meter is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value n1.

  Further, when the NOx value x15 measured by the NOx meter is higher than the threshold value, the output estimation unit 202 uses the engine output correction value o1 specified for the NOx value of the ship type 1 to determine the engine output value. Correct higher. Further, when the NOx value x15 measured by the NOx meter is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value o1.

  Further, when the lubricant viscosity x16 measured by the lubricating oil viscometer is higher than the threshold value, the output estimating unit 202 uses the specified engine output correction value p1 for the viscosity of the lubricating oil of the ship type 1 Use to correct the engine output value higher. Further, when the viscosity x16 of the lubricating oil measured by the lubricating oil viscometer is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value p1.

Further, for example, when the ship 1 is the ship type 2, the output estimation unit 202 uses the data table TBL2 as a variable factor of the engine output value for the coolant temperature, the lubricating oil pressure, the atmospheric pressure, the supply air temperature, the lubrication. The oil temperature, cooling seawater temperature, in-cylinder pressure, exhaust gas amount, and NOx value are specified. Then, the output estimation unit 202 identifies engine output correction values (b2, c2, f2, g2, h2, i2, k2, n2, and o2) corresponding to the respective fluctuation factors. Then, the output estimation unit 202 corrects the engine output value using the specified engine output correction value.
Specifically, when the cooling water temperature x2 is higher than the threshold value, the output estimation unit 202 uses the engine output correction value b2 that is the specified engine output correction value for the cooling water temperature of the ship type 2. Is increased. Further, when the coolant temperature x2 is lower than the threshold value, the output estimation unit 202 corrects the engine output value to be low using the specified engine output correction value b2.

  Further, when the lubricating oil pressure x3 is higher than the threshold value, the output estimating unit 202 corrects the engine output value to be high by using c2 that is the specified engine output correction value for the lubricating oil pressure of the ship type 2. To do. Further, when the lubricating oil pressure x3 is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value c2.

  Further, when the atmospheric pressure x6 is higher than the threshold value, the output estimating unit 202 corrects the engine output value to be low by using f2 that is the specified engine output correction value for the atmospheric pressure of the ship type 2. Further, when the atmospheric pressure x6 is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be high by using the specified engine output correction value f2.

  Further, when the supply air temperature x7 is higher than the threshold value, the output estimation unit 202 corrects the engine output value to be low using g2 which is the specified engine output correction value for the supply air temperature of the ship type 1. To do. Further, when the supply air temperature x7 is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be high by using the specified engine output correction value g2.

  Further, when the lubricating oil temperature x8 is higher than the threshold value, the output estimating unit 202 corrects the engine output value to be high by using h2 that is the specified engine output correction value for the lubricating oil temperature of the ship type 2. To do. Further, when the lubricating oil temperature x8 is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value h2.

  Further, when the cooling seawater temperature x9 is higher than the threshold value, the output estimating unit 202 corrects the engine output value to be low by using i2 that is the specified engine output correction value for the cooling seawater temperature of the ship type 2. To do. Further, when the cooling seawater temperature x9 is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be high by using the specified engine output correction value i2.

  Further, when the in-cylinder pressure x11 is higher than the threshold value, the output estimating unit 202 corrects the engine output value to be high by using k2 that is the specified engine output correction value for the in-cylinder pressure of the ship type 2. Further, when the in-cylinder pressure x11 is lower than the threshold value, the output estimation unit 202 corrects the engine output value to be low using the specified engine output correction value k2.

  Further, when the exhaust gas amount x14 is higher than the threshold value, the output estimating unit 202 corrects the engine output value to be high by using the specified engine output correction value n2 for the exhaust gas amount of the ship type 2. Further, when the exhaust gas amount x14 is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low using the specified engine output correction value n2.

  Further, when the NOx value x15 is higher than the threshold value, the output estimating unit 202 corrects the engine output value to be high by using the specified engine output correction value o2 for the NOx value of the ship type 2. Further, when the NOx value x15 is lower than the threshold value, the output estimating unit 202 corrects the engine output value to be low by using the specified engine output correction value o2.

  As described above, the output estimation unit 202 identifies the fluctuation element of the engine output value according to the type of the ship 1 that has been input. The output estimation unit 202 specifies the engine output correction value based on the comparison result between the physical quantity of the variable element of the specified engine output value and the threshold value. Then, the output estimation unit 202 can estimate the engine output value with higher accuracy by correcting the engine output value using the engine output correction value corresponding to the input type of the ship 1.

Next, the estimation of the current fuel consumption per unit time performed by the fuel consumption estimation unit 203 according to the present embodiment will be described.
The fuel consumption amount estimation unit 203 estimates the current fuel consumption amount per unit time using the correspondence relationship between the engine speed, the engine output value, and the fuel consumption amount for each type of the ship 1 as shown in FIG. . Specifically, the fuel consumption amount estimation unit 203 inputs the engine speed from the rotation speed acquisition unit 201. The fuel consumption amount estimation unit 203 inputs the engine output value specified by the output estimation unit 202. The fuel consumption amount estimation unit 203 reads, for example, a data table TBL3 shown in FIG.
The fuel consumption amount estimation unit 203 specifies the same data as the engine speed input from the rotation speed acquisition unit 201 in the data table TBL3 read from the storage unit 40. For example, when the engine speed input from the rotation speed acquisition unit 201 is 1500 [rpm], the fuel consumption amount estimation unit 203 determines that the input engine speed is 1500 [rpm] and the data table TBL3 shown in FIG. The engine speed is compared in order. Then, the fuel consumption amount estimation unit 203 specifies data numbers 3900 to 4100 having engine speeds that match the input engine speed 1500 [rpm] in the data table TBL3.
The fuel consumption amount estimation unit 203 specifies the same data as the engine output value estimated by the output estimation unit 202 in the specified data number. For example, the data numbers specified for the engine speed input by the fuel consumption estimation unit 203 are the data numbers 3900 to 4100 shown in FIG. 6, and the engine output value estimated by the output estimation unit 202 is 460 [PS]. In some cases, the fuel consumption estimation unit 203 sequentially compares the engine output value 460 [PS] estimated by the output estimation unit 202 with the engine output value in the data numbers 3900 to 4100. The fuel consumption amount estimation unit 203 identifies a data number 4003 having an engine output value that matches the engine output value 460 [PS] estimated by the output estimation unit 202 in the data numbers 3900 to 4100. Then, the fuel consumption amount estimation unit 203 estimates 81 [l / h] of the fuel consumption amount per unit time in the data number 4003 as the current fuel consumption amount per unit time.
The fuel consumption amount estimation unit 203 specifies the data number that matches the engine output value estimated by the output estimation unit 202 in the data table TBL3, and then matches the engine speed input from the rotation number acquisition unit 201. The number may be specified, and the current fuel consumption per unit time may be estimated.
In addition, the fuel consumption amount estimation unit 203, when there is no data in the data table TBL3 that matches the engine rotation number input from the rotation number acquisition unit 201 or the engine output value estimated by the output estimation unit 202, the rotation number acquisition unit 201. The data may be generated by performing interpolation using data of data numbers including the engine rotational speed input from 1 and values before and after the engine output value estimated by the output estimating unit 202. For example, the engine speed input by the fuel consumption estimation unit 203 from the rotation speed acquisition unit 201 identifies the data numbers 3900 to 4100 shown in FIG. 6 for 1500 [RPM], and the engine output estimated by the output estimation unit 202 When the value is 360 [PS], the fuel consumption estimation unit 203 calculates the fuel consumption per unit time of the data number 4001 and the data number 4002 including values before and after the engine output value estimated by the output estimation unit 202. A linear interpolation is performed to generate and estimate a fuel consumption of 65 [l / h].

Next, correction of the current fuel consumption per unit time performed by the fuel consumption estimation unit 203 according to the present embodiment will be described.
The fuel consumption amount estimation unit 203 reads, for example, the data table TBL4 shown in FIG. In the data table TBL4, the combination of fuel consumption fluctuation factors per unit time and the fuel consumption correction value for each fuel consumption fluctuation factor are different for each type of ship 1.
The fuel consumption amount estimation unit 203 specifies a variation factor of the fuel consumption amount per unit time according to the type of the input ship 1. The fuel consumption amount estimation unit 203 specifies the fuel consumption correction value of the current fuel consumption amount per unit time based on the comparison result between the physical amount of the specified variation factor of the fuel consumption amount and the threshold value. For example, the fuel consumption amount estimation unit 203 uses the data table TBL4 shown in FIG. 7 to change the fuel consumption amount per unit time when the ship 1 is a ship type 1 as the fuel inlet temperature and the lower level of the fuel. Identified as calorific value. Then, the fuel consumption amount estimation unit 203 identifies the fuel consumption amount correction value (q1, r1) corresponding to each variable element. Then, the fuel consumption estimation unit 203 corrects the fuel consumption per unit time using the specified fuel consumption correction value.
Specifically, when the fuel inlet temperature y1 is higher than the threshold value, the fuel consumption amount estimation unit 203 uses q1 that is the specified fuel consumption amount correction value for the fuel inlet temperature of the ship type 1. The fuel consumption per unit time is corrected to be low. Further, when the fuel inlet temperature y1 is higher than the threshold value, the fuel consumption amount estimation unit 203 corrects the fuel consumption amount per unit time to be high using the specified fuel consumption amount correction value q1.

  Further, when the lower heating value y2 of the fuel is higher than the threshold value, the fuel consumption amount estimation unit 203 uses r1 that is the specified fuel consumption correction value for the lower heating value of the fuel of the ship type 1. Correct the fuel consumption per unit time. Further, when the lower heating value y2 of the fuel is lower than the threshold value, the fuel consumption amount estimation unit 203 corrects the fuel consumption amount per unit time to be higher using the specified fuel consumption amount correction value r1.

In addition, for example, the fuel consumption amount estimation unit 203 uses the data table TBL4 shown in FIG. 7 to change the fuel consumption amount variation factor per unit time when the ship 1 is a ship type 2 to the lower heating value of the fuel. Is identified. Then, the fuel consumption amount estimation unit 203 specifies the fuel consumption amount correction value (r2) corresponding to the variation factor. Then, the fuel consumption estimation unit 203 corrects the fuel consumption per unit time using the specified fuel consumption correction value.
Specifically, the fuel consumption amount estimation unit 203 is the specified fuel consumption amount correction value for the lower heating value of the fuel of the ship type 2 when the lower heating value y2 of the fuel is higher than the threshold value. The fuel consumption per unit time is corrected to be low using r2. Further, when the lower heating value y2 of the fuel is lower than the threshold value, the fuel consumption amount estimation unit 203 corrects the fuel consumption amount per unit time to be higher using the specified fuel consumption amount correction value r2.

  As described above, the fuel consumption amount estimation unit 203 identifies the fluctuation factor of the fuel consumption amount per unit time according to the type of the input ship 1. The fuel consumption amount estimation unit 203 identifies the fuel consumption amount based on the comparison result between the physical amount of the variation factor of the identified fuel consumption amount per unit time and the threshold value. Then, the fuel consumption amount estimation unit 203 corrects the fuel consumption amount per unit time by using the fuel consumption amount correction value corresponding to the input type of the ship 1, so that the fuel consumption amount per unit time can be more accurately determined. The amount can be estimated.

Next, calculation of a score indicating an index of low fuel consumption driving by the display control unit 204 according to the present embodiment will be described.
The display control unit 204 calculates a score based on the variation in fuel consumption indicated by the engine output value, the engine speed, and the boost pressure. Specifically, for example, the display control unit 204 displays the region A in the order of the region indicating the low fuel consumption in the graph indicating the correspondence relationship between the engine output value, the engine speed, and the boost pressure as illustrated in FIG. Read data divided into the region D and the region G from the storage unit 40. In addition, the display control unit 204 inputs the current engine output value, engine speed, and boost pressure from the output estimation unit 202. The display control unit 204 displays a region A in the graph indicating the correspondence between the engine output value, the engine speed, and the boost pressure, in which the current engine output value, the engine speed, and the boost pressure indicate. Identifies which of the region D and the region G is included. The display control unit 204 specifies this area at regular intervals (for example, every 0.1 second). When the display control unit 204 specifies an area for each fixed period, the display control unit 204 adds points assigned to each of the areas A to D and G corresponding to the specified area for a predetermined time (for example, 1 hour). Further, the display control unit 204 calculates a point when it is assumed that the points indicated by the engine output value, the engine speed, and the boost pressure have been in the region A with the lowest fuel consumption for a predetermined time. Then, the display control unit 204 divides the point added for the predetermined time by the point when it is assumed that the region A of the lowest fuel consumption amount has entered the predetermined time, and calculates a value multiplied by 100 as a score. For example, it is assumed that the area A is 100 points, the area B is 60 points, the area C is 30 points, and the area D is 0 points. Then, the display control unit 204 identifies the point indicated by the engine output value, the engine speed, and the boost pressure every 0.1 second during 1 hour 3000 times, and is the region B. 29000 times, region 3000 is specified 3000 times, and region D is specified 1000 times. In this case, the display control unit 204 calculates (100 × 3000 + 60 × 29000 + 30 × 3000 + 0 × 1000) ÷ (100 × 36000) × 100 and calculates a score of 57.

Next, a screen displayed by the display unit 30 will be described based on the control by the display control unit 204 according to the present embodiment.
When the display control unit 204 performs display control on the display unit 30, for example, as illustrated in FIG. 9, the display unit 30 displays the engine speed 71, the engine output value 72, the boat speed 73, and the current instantaneous fuel. Consumption 74, Average fuel consumption 75, Current time 76, Estimated arrival time 77, Navigation distance 78, Navigable distance 79, Fuel consumption integrated value 80, Fuel consumption 81 relative to fuel consumption integrated value, Engine speed And a correspondence relationship 82 between the engine output value and the fuel consumption, a score 83 indicating an operation index of low fuel consumption, a GPS connection status 84, a maintenance period 85, and an instantaneous fuel consumption 86 are displayed.
In the example of the display screen of the display unit 30 shown in FIG. 9, the engine speed 71 is XXX [RPM]. The engine output value 72 is XXX [PS]. The ship speed 73 of the ship 1 is 17 [kt (knots)]. The current instantaneous fuel consumption 74 is 50.0 [L (liter) / h]. The average fuel consumption 75 is 48.0 [L / h]. The current time 76 is 20:08. The estimated arrival time 77 is 1 hour 30 minutes. The voyage distance 78 is 80 [mile]. The navigable distance 79 is 200 [mile (mile)]. The fuel consumption integrated value 80 is 100 [L]. The fuel cost 81 for the integrated value of the fuel consumption is 18000 yen. Further, the display unit 30 shown in FIG. 9 shows a past history of the correspondence relationship 82 between the engine speed, the engine output value, and the fuel consumption. Further, the display unit 30 shows a score 83 indicating an index of operation with low fuel consumption by a combination of the number of bars and the color of the bars. A GPS connection status 84 is shown in the lower right of the display unit 30. Further, when maintenance is necessary, for example, a red triangle mark indicating that the maintenance time is 85 is displayed in the lower right portion of the display unit 30. In the display unit 30, the instantaneous fuel consumption 86 is displayed on the right side of the score 83. The score 83, the GPS connection status 84, the maintenance time 85, and the instantaneous fuel consumption 86 are information that is always notified even when the display screen of the display unit 30 is switched.
In addition, as shown in FIG. 10, for example, the score 83 indicating the low fuel consumption driving index has a higher number of bars as the score is higher. Further, the score 83 indicating the low fuel consumption operation index may be such that when the number of bars is large, the color of the bar is changed to green, and the color is changed from yellow to red as the number of bars is decreased.

Next, the processing flow of the fuel consumption estimation apparatus 20 according to the present embodiment shown in FIG. 11 will be described.
The rotation speed acquisition unit 201 according to the present embodiment acquires the current engine rotation speed of the engine 10 detected by the pickup sensor 101 from the pickup sensor 101 (step S1). The rotation speed acquisition unit 201 outputs the acquired engine rotation speed to the output estimation unit 202, the fuel consumption amount estimation unit 203, and the display control unit 204.

The output estimation unit 202 inputs the engine speed of the engine 10 from the rotation speed acquisition unit 201. Further, the output estimation unit 202 acquires a boost pressure of compressed air generated by the supercharging device 102 detected by the pressure sensor 103. Further, the output estimation unit 202 reads the data table TBL1 indicating the correspondence relationship between the engine speed, the boost pressure, and the engine output value from the storage unit 40.
Based on the type of the ship 1, the output estimation unit 202 specifies data indicating the correspondence relationship between the engine speed, the boost pressure, and the engine output value according to the current type of the ship 1 in the data table TBL1. Then, the output estimation unit 202 specifies a data number having the same engine speed as the engine speed input from the speed acquisition unit 201 in the data table TBL1.
The output estimation unit 202 specifies a data number having the same boost pressure as the boost pressure acquired from the pressure sensor 103 in the specified data number. Then, the output estimation unit 202 estimates the engine output value at the specified data number as the current engine output value (step S2). Note that the output estimation unit 202 determines that the engine input from the rotation speed acquisition unit 201 when there is no data in the data table TBL1 that matches the engine rotation speed input from the rotation speed acquisition unit 201 or the boost pressure acquired from the pressure sensor 103. Data may be generated by performing interpolation using data of data numbers including values before and after the boost pressure acquired from the rotational speed and the pressure sensor 103.

  The output estimation unit 202 calculates an engine output correction value for the current engine output value based on the comparison result between the physical quantity of the output fluctuation element that fluctuates the current engine output value and the threshold value corresponding to the type of the ship 1. Specify (step S3). Then, the output estimation unit 202 estimates the corrected current engine output value based on the specified engine output correction value, the current engine speed, and the current boost pressure (step S4). The output estimation unit 202 outputs the corrected current engine output value to the fuel consumption amount estimation unit 203 and the display control unit 204.

The fuel consumption amount estimation unit 203 inputs the engine speed of the engine 10 from the rotation speed acquisition unit 201. In addition, the fuel consumption amount estimation unit 203 inputs the current engine output value corrected from the output estimation unit 202. Further, the fuel consumption amount estimation unit 203 reads the data table TBL3 indicating the correspondence relationship between the engine speed, the engine output value, and the fuel consumption amount from the storage unit 40.
The fuel consumption amount estimation unit 203 specifies data indicating the correspondence relationship between the engine speed, the engine output value, and the fuel consumption amount according to the current type of the ship 1 in the data table TBL3 based on the type of the ship 1. Then, the fuel consumption amount estimation unit 203 specifies a data number having the same engine speed as the engine speed input from the speed acquisition unit 201 in the data table TBL3.
The fuel consumption amount estimation unit 203 specifies a data number having the same engine output value as the corrected current engine output value input from the output estimation unit 202 in the specified data number. Then, the fuel consumption amount estimation unit 203 estimates the fuel consumption amount per unit time in the specified data number as the current fuel consumption amount per unit time (step S5). Note that the fuel consumption amount estimation unit 203 acquires the rotation number when there is no data that matches the engine rotation number input from the rotation number acquisition unit 201 or the corrected engine output value input from the output estimation unit 202 in the data table TBL3. Data may be generated by performing interpolation using data number data including values before and after the engine speed input from the unit 201 and the corrected engine output value input from the output estimation unit 202.

  The fuel consumption amount estimation unit 203 calculates the current unit time per unit time based on the comparison result between the physical amount of the consumption variation factor that changes the fuel consumption amount per unit time and the threshold value according to the type of the ship 1. A fuel consumption correction value for the fuel consumption is specified (step S6). Then, the fuel consumption amount estimation unit 203 estimates the corrected current fuel consumption amount per unit time based on the specified fuel consumption amount correction value, the current engine output value, and the current engine speed. (Step S7). The fuel consumption amount estimation unit 203 outputs the corrected current fuel consumption amount per unit time to the display control unit 204.

The display control unit 204 calculates display data (step S8). Here, the display data includes cost information, ship speed, average fuel consumption, current time, estimated arrival time, voyage distance, navigable distance, fuel consumption integrated value, low fuel consumption driving index, Maintenance time.
Specifically, the display control unit 204 calculates cost information based on the fuel consumption per unit time estimated by the fuel consumption estimation unit 203 and the unit price of fuel.
Further, the display control unit 204 calculates the ship speed of the ship 1 from the amount of change per unit time of the current position of the ship 1 input from the GPS 50.
Further, the display control unit 204 integrates the fuel consumption per unit time input from the fuel consumption estimation unit 203, and calculates the average fuel consumption by dividing by the integration time.
Further, the display control unit 204 counts the number of oscillations of the oscillator using the crystal resonator from the reference time, and calculates a time obtained by adding a time corresponding to the number of oscillations counted at the reference time as the current time.
The display control unit 204 calculates the distance from the current position to the target position from the target position input by the user and the current position input from the GPS 50, and divides the calculated distance by the current boat speed from the current time. Calculate the estimated arrival time.
Further, the display control unit 204 calculates the voyage distance by integrating the amount of change in position per unit time from the departure position to the current position based on the current position input from the GPS 50.
The display control unit 204 also calculates the total fuel consumption by integrating the fuel consumption per unit time estimated by the fuel consumption estimation unit 203, and subtracts the total fuel consumption from the fuel amount at the start of voyage. . The display control unit 204 calculates the navigable distance by dividing the total fuel consumption by the instantaneous fuel consumption and multiplying by the boat speed.
In addition, the display control unit 204 integrates the fuel consumption per unit time input from the fuel consumption estimation unit 203 to calculate a fuel consumption integrated value.
The display control unit 204 also displays a score indicating an index of low fuel consumption driving determined based on the current engine output value of the engine 10, the current engine speed of the engine 10, and the boost pressure of the engine 10. calculate.
Further, the display control unit 204 calculates the maintenance time for each maintenance item based on the accumulated operation time.

The display control unit 204 inputs the engine speed from the rotation speed acquisition unit 201. In addition, the display control unit 204 receives an engine output value from the output estimation unit 202. Further, the display control unit 204 inputs the current fuel consumption per unit time from the fuel consumption estimation unit 203.
The display control unit 204 controls the display unit 30 to display the input engine speed, engine output value, current fuel consumption per unit time, and display data (step S9).

  The display unit 30 displays the engine speed, the engine output value, the current fuel consumption per unit time, and display data based on the control by the display control unit 204 (step S10). The display unit 30 displays, for example, the display screen illustrated in FIG. 9 based on the control by the display control unit 204.

The processing of the fuel consumption estimation device 20 according to this embodiment has been described above. According to the processing of the fuel consumption estimation device 20 according to the present embodiment, the rotation speed acquisition unit 201 acquires the current engine rotation speed of the engine 10 detected by the pickup sensor 101 from the pickup sensor 101. Based on the engine speed input from the engine speed acquisition unit 201 and the boost pressure indicating the pressure of the compressed air generated by the supercharger 102 based on the exhaust gas of the current engine 10, the output estimation unit 202 Estimate the engine output value. The fuel consumption amount estimation unit 203 calculates the current fuel consumption amount per unit time based on the current engine output value input from the output estimation unit 202 and the current engine speed input from the rotation speed acquisition unit 201. presume. The display control unit 204 performs control to display the current fuel consumption per unit time input from the fuel consumption estimation unit 203 on the display unit 30.
In this way, the remaining amount of fuel in the ship 1 is only displayed as a rough scale, and in the ship 1 that does not include a fuel flow meter and does not use an electronically controlled injector, Fuel consumption can be estimated.

  Note that the storage unit 40 according to the present invention may be provided anywhere as long as appropriate information is transmitted and received. In addition, the storage unit 40 may exist in a range in which appropriate information is transmitted and received, and the data may be distributed and stored.

  In the processing flow in the embodiment of the present invention, the order of processing may be changed within a range where appropriate processing is performed.

  In addition, although embodiment of this invention was described, the above-mentioned fuel consumption amount estimation apparatus 20 has a computer system inside. The process described above is stored in a computer-readable recording medium in the form of a program, and the above process is performed by the computer reading and executing this program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  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, what is called a difference file (difference program) may be sufficient.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. Various omissions, replacements, and changes can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 ... Ship 10 ... Engine 20 ... Fuel consumption estimation apparatus 30 ... Display part 40 ... Memory | storage part 101 ... Pick-up sensor 102 ... Supercharging device 103 ... Pressure sensor 201 ... Rotational speed acquisition unit 202 ... Output estimation unit 203 ... Fuel consumption estimation unit 204 ... Display control unit

Claims (8)

A rotation speed acquisition unit for acquiring a current engine rotation speed of an engine used in the ship;
An output estimator for estimating a current engine output value based on the acquired engine speed and a boost pressure indicating a pressure of compressed air generated by a supercharging device based on the current exhaust gas of the engine;
A fuel consumption estimation unit that estimates a current fuel consumption per unit time based on the current engine output value and the current engine speed;
A display control unit for performing control to display the current fuel consumption per unit time on a display unit;
A fuel consumption estimation device comprising: The output estimation unit
An engine output correction value for the current engine output value is specified based on a comparison result between a physical quantity of an output fluctuation element that changes the current engine output value and a threshold value, and the engine output correction value and the current Estimating the current engine output value based on the engine speed and the current boost pressure;
The fuel consumption estimation apparatus according to claim 1. The output estimation unit
The output variation factor is specified according to the type of the input ship, and the engine output correction value for the current engine output value is specified based on the comparison result between the physical quantity of the output variation factor and the threshold value. To
The fuel consumption estimation apparatus according to claim 2. The fuel consumption estimation unit
Identifying a fuel consumption correction value for the current fuel consumption per unit time based on a comparison result between a physical quantity of a consumption fluctuation factor that changes the current fuel consumption per unit time and a threshold; Estimating the current fuel consumption per unit time based on the fuel consumption correction value, the current engine output value, and the current engine speed;
The fuel consumption estimation apparatus according to claim 1 or 2. The fuel consumption estimation unit
According to the type of the input ship, the consumption fluctuation factor is specified, and the current fuel consumption per unit time is determined based on the comparison result between the physical quantity of the consumption fluctuation factor and the threshold value. Identify fuel consumption correction values,
The fuel consumption estimation apparatus according to claim 4. The display control unit
Performing control to display on the display unit the cost information calculated based on the fuel consumption per unit time and the unit price of fuel,
The fuel consumption estimation apparatus according to any one of claims 1 to 5. The rotation speed acquisition unit acquires the current engine rotation speed of the engine used in the ship,
The output estimation unit estimates a current engine output value based on the acquired engine speed and a boost pressure indicating a pressure of compressed air generated by a supercharger based on the current exhaust gas of the engine. ,
The fuel consumption amount estimation unit estimates a current fuel consumption amount per unit time based on the current engine output value and the current engine speed,
The display control unit is a fuel consumption estimation method for performing control for displaying the current fuel consumption per unit time on the display unit. Computer
A rotational speed acquisition means for acquiring a current engine rotational speed of an engine used in the ship;
An output estimation means for estimating a current engine output value based on the acquired engine speed and a boost pressure indicating a pressure of compressed air generated by a supercharging device based on the exhaust gas of the current engine;
Fuel consumption estimation means for estimating the current fuel consumption per unit time based on the current engine output value and the current engine speed;
Display control means for performing control to display the current fuel consumption per unit time on a display unit;
Program to function as.

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