Carbon dioxide emissions calculation method and calculation device for engine-driven work machine

Abstract

In the present invention, necessary information is stored in advance in a storing means 11 provided to a control device 10 for an engine-driven work machine, and a type of fuel being used is identified at a fuel type identifying means 12 implemented in the control device 10; also, an instantaneous fuel consumption amount [L / sec] that is an amount of fuel consumed per unit time is acquired at an instantaneous fuel consumption amount acquiring means 13, and instantaneous emissions [g / sec], which is carbon dioxide emissions per unit time, is calculated at an instantaneous emissions calculating means 14 on the basis of the instantaneous fuel consumption amount [L / sec] as well as an emission factor [kg / L] for the fuel identified at the fuel type identifying means 12, among emission factors (carbon dioxide emissions per 1 L fuel) of respective fuels that are stored in the storing means 11. This configuration makes it possible to calculate the amount of carbon dioxide emissions of the engine-driven work machine accurately, even if the fuel used has been modified within a predetermined range of diesel and diesel alternative fuels.

Description

Method and device for calculating carbon dioxide emissions from engine-driven work machines

[0001] The present invention relates to a method for calculating carbon dioxide emissions from an engine-driven working machine, and a carbon dioxide emission calculation device that executes the calculation method. More specifically, the present invention relates to a carbon dioxide emission calculation method that can accurately calculate the carbon dioxide emissions from an engine-driven working machine that is operated using one type of fuel selected from diesel and diesel alternative fuels depending on the situation, and a carbon dioxide emission calculation device that executes the calculation method.

[0002] Engine-driven work machines, in which the engine and the work machine body, such as the generator body or compressor body driven by the engine, are housed in a common soundproof box, for example, are widely used for outdoor work such as at civil engineering and construction sites due to their portability.

[0003] Such engine-driven working machines are driven by diesel engines, which are internal combustion engines, and therefore, the use of engine-driven working machines involves the emission of carbon dioxide.

[0004] Today, when there is a strong demand to transition to a carbon-free society, there is a strong need to reduce emissions of greenhouse gases such as carbon dioxide, and the Act on Promotion of Global Warming Countermeasures (also known as the "Global Warming Countermeasures Act") requires certain businesses to calculate their own greenhouse gas emissions and report them to the government.

[0005] In addition, such greenhouse gas emission reductions are also subject to trading, and if you want to sell your carbon dioxide emission reductions using a system for such trading (so-called "carbon credits" or "J-credits"), you will need to calculate the amount of carbon dioxide emission reduction you will achieve.

[0006] As a result, users of engine-driven working machines are increasingly calculating the carbon dioxide emissions and emission reductions of their machines, and there is a demand for engine-driven working machines to be equipped with a function that can automatically calculate and display the carbon dioxide emissions and emission reductions.

[0007] Regarding the calculation and display of carbon dioxide emissions, Patent Document 1, cited below, describes a carbon dioxide emission display device for a work vehicle that calculates the amount of carbon dioxide emissions relative to fuel consumption based on the engine speed of the work vehicle and displays it on a display screen in order to raise awareness of reducing carbon dioxide emissions among work vehicle operators (see [Abstract] of Patent Document 1).

[0008] Furthermore, Patent Document 2, cited below, describes an output device for a vehicle that calculates an instantaneous emission amount, which is the amount of carbon dioxide emitted per unit time, from the amount of fuel consumed detected by a fuel sensor, and compares the calculated instantaneous emission amount with a threshold value to evaluate the instantaneous emission amount, thereby making it possible to determine whether the operator's (driver's) current driving is good or bad (see [Abstract] of Patent Document 2).

[0009] Japanese Patent Publication No. 2010-30509 Japanese Patent Publication No. 2014-240279

[0010] As societal interest in environmental issues grows, calls for decarbonization are also being placed on the civil engineering and construction industries, with calls for reductions in carbon dioxide emissions from the engine-driven work machinery mentioned above, which is often used in these industries.

[0011] On the other hand, unlike the carbon dioxide emitted by vehicles, where it is possible to reduce carbon dioxide emissions by improving the operator's (driver's) driving skills (acceleration work, etc.) as in Patent Documents 1 and 2 cited above, with engine-driven work machinery, where operation control after starting is generally performed automatically, carbon dioxide emissions cannot be reduced simply by improving the operator's (driver's) awareness.In order to reduce carbon dioxide emissions, it is necessary to use GTL fuel or biofuels such as B100 fuel, which emit less carbon dioxide than diesel (have a high emission reduction effect), instead of general diesel as the fuel used in engine-driven work machinery, and with increasing environmental awareness, some clients are now requiring contractors to use biofuels as a condition for participating in construction bidding.

[0012] On the other hand, although preferential treatment has been given to GTL fuels and biofuels such as B100 fuels, such as tax exemptions, they are still more expensive than diesel and their availability is limited. Therefore, although it is recognized that the use of GTL fuels and biofuels has less of an impact on the environment, there may still be situations where diesel fuel must be used as fuel, such as when using engine-driven work equipment at cost-conscious construction sites or in areas where GTL fuels and biofuels are difficult to obtain.

[0013] Furthermore, when engine-driven work equipment is offered for rental, the type of fuel used to operate the engine-driven work equipment will vary depending on the renter, due to differences in the renter's awareness of environmental issues and the types of fuel that are easily available to the renter.

[0014] As a result, the same fuel is not always supplied to and used with a single engine-driven work machine; instead, depending on changes in usage conditions or the user, any one of diesel or diesel alternative fuels (GTL fuel, biofuels such as B100 fuel) may be selectively used.

[0015] Here, even when the same engine-driven work machine is used under the same load, the amount of carbon dioxide emissions differs depending on whether the fuel used is diesel, GTL fuel, or B100 fuel.

[0016] Therefore, if one wishes to accurately calculate the carbon dioxide emissions of engine-driven work equipment, the calculation must take into account the type of fuel used.

[0017] However, the inventions described in the above-mentioned Patent Documents 1 and 2 do not anticipate changing the fuel used, and do not have a means for calculating carbon dioxide emissions according to the type of fuel when the fuel used is changed.

[0018] Therefore, when the inventions described in Patent Documents 1 and 2 are applied to an engine-driven working machine that can use any one of diesel and diesel alternative fuels depending on the situation, it is not possible to accurately calculate the amount of carbon dioxide emissions.

[0019] Furthermore, since the above-mentioned Patent Documents 1 and 2 do not anticipate changing the fuel used, it is not possible to calculate or display the amount of carbon dioxide emission reduction, which indicates the extent to which carbon dioxide emissions are reduced when using diesel alternative fuels such as GTL fuel or B100 fuel compared to the amount of carbon dioxide emissions when diesel is used.

[0020] Therefore, to accurately grasp the carbon dioxide emissions and emission reduction amounts for each engine-driven working machine, it is necessary to record the type of fuel used, the amount of fuel used, the amount of fuel remaining in the tank, etc. for each engine-driven working machine, and then to perform the cumbersome task of calculating the carbon dioxide emissions and emission reduction amounts based on the data recorded in this way.

[0021] However, civil engineering and construction sites often use multiple engine-driven machines, each with different models and operating conditions (fuel used, load factor, etc.), so calculating and understanding the carbon dioxide emissions and emission reductions for each machine is a complicated task, and allocating personnel to do this is very costly.

[0022] Therefore, there is a demand for a system that allows users to easily calculate and display the amount of carbon dioxide emissions and the amount of emission reduction for each engine-driven working machine.

[0023] Therefore, the present invention has been made to eliminate the drawbacks of the above-mentioned conventional technology, and its first object is to provide a carbon dioxide emission calculation method for an engine-driven work machine that can accurately calculate carbon dioxide emissions even when the type of fuel used is changed, and a carbon dioxide emission calculation device that executes this calculation method.

[0024] A second object of the present invention is to provide a method for calculating carbon dioxide emissions from an engine-driven working machine, which can calculate the amount of carbon dioxide emissions reduced by the engine-driven working machine compared to when the machine is operated using diesel fuel, as an emission reduction amount, and a carbon dioxide emissions calculation device for executing the calculation method.

[0025] The means for solving the problems will be described below together with the reference numerals used in the description of the embodiment of the invention. These reference numerals are used to clarify the correspondence between the description of the claims and the description of the embodiment of the invention, and needless to say, are not used to restrict the interpretation of the technical scope of the present invention.

[0026] In order to achieve the above object, the carbon dioxide emission calculation method for an engine-driven working machine of the present invention is a method for calculating carbon dioxide emission from an engine-driven working machine that includes a diesel engine and a working machine body 30 driven by the engine, and that is operated using any one type of fuel selected from diesel and diesel alternative fuel, and includes: providing storage means 11 that stores an emission coefficient [kg / L], which is the amount of carbon dioxide emitted per predetermined amount (for example, 1 L) of fuel, and a judgment criterion required for determining the type of fuel, which is obtained in advance for each type of usable fuel; and a fuel type identification process (see S101 in Figures 3, 5 and 7) that compares a detection signal (a detection signal of ultrasonic propagation velocity in the embodiment) from fuel type detection means (an ultrasonic sensor in the embodiment) 20 provided at any position in a fuel supply system (a fuel tank not shown in the embodiment) with the judgment criterion stored in the storage means 11 to identify the type of fuel in use; The method is characterized in that it includes an instantaneous fuel consumption acquisition process (see S102-S104 in Figures 3, 5 and 7) that identifies the fuel consumption [L] per unit time (e.g., 1 second) and acquires it as the instantaneous fuel consumption [L / sec] at the specified time point, and an instantaneous emission calculation process (see S105 in Figures 3, 5 and 7) that calculates the instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time, based on the emission coefficient [kg / L] of the type of fuel identified in the fuel type identification process and the instantaneous fuel consumption [L / sec] from the emission coefficients stored in the storage means 11 (claim 1).

[0027] In the carbon dioxide emission calculation method configured as above, the correspondence between the change in the instantaneous fuel consumption [L / sec] and the change in the load rate [%] of the work machine main body for each type of usable fuel, which has been acquired in advance, may be stored in the storage means 11 as a fuel consumption characteristic, and the instantaneous fuel consumption acquisition process may further include: a load rate acquisition process (see S103 in Figures 3, 5 and 7) that acquires the load rate [%] of the work machine main body 30; and an instantaneous fuel consumption calculation process (see S104 in Figures 3, 5 and 7) that calculates the instantaneous fuel consumption [L / sec] based on the fuel consumption characteristics of the type of fuel identified in the fuel type identification process from the fuel consumption characteristics stored in the storage means 11 and the load rate [%] acquired in the load rate acquisition process (see S104 in Figures 3, 5 and 7) (Claim 2).

[0028] Furthermore, the above carbon dioxide emission calculation method may include a process of calculating a reference instantaneous fuel consumption rate [L / sec], which is the instantaneous fuel consumption rate [L / sec] assuming that the fuel in use is diesel, based on the load rate [%] acquired in the load rate acquisition process and the fuel consumption rate characteristics of diesel among the fuel consumption rate characteristics stored in the storage means 11 (see S202 in Figure 5); a process of calculating a reference instantaneous emission rate [g / sec], which is the carbon dioxide emission rate per unit time assuming that the fuel is diesel, based on the emission coefficient [kg / L] of diesel among the emission coefficients [kg / L] stored in the storage means 11 and the reference instantaneous fuel consumption rate [L / sec] (see S203 in Figure 5); and a process of calculating the difference between the reference instantaneous emission rate [g / sec] and the instantaneous emission rate [g / sec] as an instantaneous emission reduction rate [g / sec], which is the carbon dioxide emission reduction rate per unit time (S204 in Figure 5) (Claim 3).

[0029] In addition, instead of the above configuration, the instantaneous emission reduction amount [g / sec] may be obtained by a process of calculating the difference between the emission coefficient [kg / L] of diesel oil among the emission coefficients [kg / L] stored in the storage means 11 and the emission coefficient [kg / L] of the type of fuel identified in the fuel type identification process as a reduction coefficient [kg / L] (see S301 in Figure 7), and a process of calculating the instantaneous emission reduction amount [g / sec] by multiplying the instantaneous fuel consumption amount [L / sec] acquired in the instantaneous fuel consumption amount acquisition process (see S102-S104 in Figure 7) by the reduction coefficient [kg / L] (see S302 in Figure 7) (Claim 4).

[0030] Any of the above carbon dioxide emission calculation methods may further include an emission amount display process (see S106 in Figures 3, 5, and 7) in which the instantaneous emission amount [g / sec] acquired in the above-mentioned instantaneous emission amount acquisition process (see S105 in Figures 3, 5, and 7) and / or the accumulated emission amount [g, kg, t], which is the accumulated value of carbon dioxide emission from a predetermined starting point to the time when the latest instantaneous fuel consumption amount [L / sec] was acquired, are displayed on a display device 40 such as a monitor screen provided on the instrument panel of the engine-driven working machine (see claim 5).

[0031] Furthermore, in the configuration for calculating the instantaneous emission reduction amount [g / sec], it may further include an emission reduction amount display process (S205 in FIGS. 5 and 7) that displays on the display device 40 the instantaneous emission reduction amount [g / sec] calculated in the instantaneous emission reduction amount calculation process (S204 in FIG. 5 and S302 in FIG. 7) and / or the accumulated emission reduction amount [g, kg, t], which is the accumulated value of the emission reduction amount from a predetermined starting point to the point at which the latest instantaneous fuel consumption amount [L / sec] was obtained (claim 6).

[0032] Furthermore, the carbon dioxide emission calculation device 1 for an engine-driven working machine of the present invention comprises a diesel engine and a working machine main body 30 driven by the engine, and is operated using any one type of fuel selected from diesel and diesel alternative fuel, and comprises: a memory means 11 that stores an emission coefficient [kg / L], which is the amount of carbon dioxide emitted per predetermined amount (e.g., 1 L) of fuel, and a judgment criterion required for determining the type of fuel, which are acquired in advance for each type of usable fuel; a fuel type identification means 12 that compares a detection signal (a detection signal of ultrasonic propagation velocity in the embodiment) from a fuel type detection means (an ultrasonic sensor in the embodiment) provided at a position in the fuel supply system (a fuel tank not shown in the embodiment) with the judgment criterion stored in the memory means 11 to identify the type of fuel being used; and an instantaneous fuel consumption acquisition means 13 that identifies fuel consumption [L] per unit time (e.g., 1 second) and acquires it as instantaneous fuel consumption [L / sec] at the specified time point. and an instantaneous emission calculation means 14 that calculates an instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time, based on the emission coefficient [kg / L] of the type of fuel identified by the fuel type identification means 12 from the emission coefficients [kg / L] stored in the storage means and the instantaneous fuel consumption amount [L / sec] (Claim 7: see Figures 1, 4 and 6).

[0033] In the carbon dioxide emission calculation device 1 configured as described above, the storage means 11 may further store, as fuel consumption characteristics (see Figure 2), a correspondence between changes in the instantaneous fuel consumption [L / sec] and changes in the load rate [%] of the work machine main body for each type of usable fuel, which has been acquired in advance, and the instantaneous fuel consumption acquisition means 13 may further include: a load rate acquisition means 131 that acquires the load rate [%] of the work machine main body 30; and an instantaneous fuel consumption calculation means 132 that calculates the instantaneous fuel consumption [L / sec] based on the fuel consumption characteristics of the type of fuel identified by the fuel type identification means 12 from the fuel consumption characteristics stored in the storage means 11 and the load rate acquired by the load rate acquisition means 131 (claim 8: see Figures 1, 4, and 6).

[0034] The carbon dioxide emission calculation device 1 configured as above further includes: a reference instantaneous fuel consumption calculation means 16 for calculating a reference instantaneous fuel consumption [L / sec], which is the instantaneous fuel consumption amount on the assumption that the fuel in use is diesel, based on the load rate [%] acquired by the load rate acquisition means 131 and the fuel consumption characteristics of diesel among the fuel consumption characteristics stored in the storage means 11; and a reference instantaneous emission calculation means 17 for calculating a reference instantaneous emission [g / sec], which is the amount of carbon dioxide emission per unit time on the assumption that the fuel is diesel, based on the emission coefficient [kg / L] of diesel among the emission coefficients [kg / L] stored in the storage means 11 and the reference instantaneous fuel consumption [L / sec] calculated by the reference instantaneous fuel consumption calculation means 16. It is also possible to provide an instantaneous emission reduction calculation means 18 that calculates the difference between the reference instantaneous emission amount [g / sec] calculated by the reference instantaneous emission amount calculation means 17 and the instantaneous emission amount [g / sec] calculated by the instantaneous emission amount calculation means 14 as an instantaneous emission reduction amount [g / sec], which is the amount of carbon dioxide emission reduction per unit time (Claim 9: see Figure 4).

[0035] Instead of the above configuration, the calculation of the instantaneous emission reduction amount [g / sec] may be performed by providing a reduction coefficient calculation means 19 that calculates the difference between the emission coefficient [kg / L] of diesel among the emission coefficients [kg / L] stored in the memory means 11 and the emission coefficient [kg / L] of the type of fuel identified by the fuel type identification means 12 as a reduction coefficient, and an instantaneous emission reduction amount calculation means 18' that calculates the value obtained by multiplying the instantaneous fuel consumption amount [L / sec] acquired by the instantaneous fuel consumption amount acquisition means 13 by the reduction coefficient [kg / L] calculated by the reduction coefficient calculation means 19 as the instantaneous emission reduction amount [g / sec], which is the amount of carbon dioxide emission reduction per unit time (Claim 10: see Figure 6).

[0036] Any of the above carbon dioxide emission calculation devices 1 may further include an emission display means 15 that displays on a display device 40 the instantaneous emission amount [g / sec] calculated by the instantaneous emission amount calculation means 14 and / or the accumulated emission amount [g, kg, t], which is the accumulated value of carbon dioxide emission from a predetermined starting point to the time when the latest instantaneous fuel consumption amount [L / sec] is obtained (claim 11: see Figures 1, 4 and 6).

[0037] Furthermore, in a configuration in which instantaneous emission reduction calculation means 18, 18' are provided, an emission reduction display means 15' may be further provided which displays on a display device 40 the instantaneous emission reduction [g / sec] calculated by the instantaneous emission reduction calculation means 18, 18' and / or the accumulated emission reduction [g, kg, t] which is the accumulated value of the emission reduction from a predetermined starting point to the point in time when the latest instantaneous fuel consumption [L / sec] was obtained (Claim 12: see Figures 4 and 6).

[0038] With the configuration of the present invention described above, the present invention can achieve the following significant effects.

[0039] Regardless of the type of fuel used in the engine-driven working machine, it is possible to automatically and accurately calculate / accumulate the instantaneous and / or cumulative carbon dioxide emissions of the engine-driven working machine, and by displaying this on a display device 40 such as a monitor, it is now possible to easily grasp the amount of carbon dioxide emissions.

[0040] In the past, when trying to accurately grasp the amount of carbon dioxide emissions for each engine-driven work machine, it was necessary to perform the complicated and time-consuming task of recording the type of fuel used for each engine-driven work machine, the amount of fuel used, the amount of fuel remaining in the tank, etc., and then calculating the amount of carbon dioxide emissions.However, with the present invention, it is now possible to efficiently and accurately calculate the amount of carbon dioxide emissions for each engine-driven work machine without performing such complicated and time-consuming work, and use the information for reporting, compilation, etc.

[0041] The instantaneous fuel consumption [L / sec] used to calculate the instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time, can be obtained, for example, by installing a flow meter in the fuel supply system or by obtaining data from the engine control unit (ECU). However, by storing in advance in the memory means 11 the fuel consumption characteristics, which are the correspondence between changes in instantaneous fuel consumption [L / sec] and changes in the load rate [%] of the work machine main body 30, and then calculating the instantaneous fuel consumption [L / sec] from these fuel consumption characteristics and the load rate [%] of the work machine main body 30, it is possible to calculate and display the amount of carbon dioxide emitted without actually measuring the amount of fuel consumed per unit time.

[0042] In addition, in conventional device configurations for calculating and displaying carbon dioxide emissions, as introduced in the above-mentioned Patent Documents 1 and 2, although there are devices that calculate and display carbon dioxide emissions, there are no devices that calculate and display the amount of carbon dioxide emissions reduced, and if you want to know the amount of emissions reduced, you have to perform additional, complicated calculation and tabulation work.

[0043] However, the configuration of the present invention makes it possible to automatically calculate not only the amount of carbon dioxide emissions but also the amount of carbon dioxide emission reduction compared to using diesel fuel, and furthermore, makes it possible to display the calculated amount of emission reduction, making it possible to grasp the amount of carbon dioxide emission reduction without performing such complicated calculation work, making it easier for users of engine-driven working machines to participate in the carbon credit system and therefore providing an incentive for them to actively participate in efforts to combat global warming.

[0044] 1. Functional block diagram of a carbon dioxide emission calculation device for an engine-driven working machine of the present invention (an example of a configuration that only calculates emissions). An explanatory diagram of fuel consumption characteristics to be stored in a storage means (a correlation diagram between load factor and instantaneous fuel consumption for each fuel). A flow diagram showing the operation of the carbon dioxide emission calculation device of Figure 1. A functional block diagram showing a modified example of a carbon dioxide emission calculation device for an engine-driven working machine of the present invention (an example of a configuration that allows calculation of emission reductions in addition to emissions). A flow diagram showing the operation of the carbon dioxide emission calculation device of Figure 4. A functional block diagram showing yet another modified example of a carbon dioxide emission calculation device for an engine-driven working machine of the present invention (an example of a configuration that allows calculation of emission reductions in addition to emissions). A flow diagram showing the operation of the carbon dioxide emission calculation device of Figure 6.

[0045] Hereinafter, a carbon dioxide emission calculation device 1 for an engine-driven working machine according to the present invention will be described with reference to the accompanying drawings.

[0046] [Engine-driven working machines to be targeted] The carbon dioxide emission calculation device 1 of the present invention is not particularly limited and can be targeted to a variety of engine-driven working machines that have a diesel engine (not shown) and a working machine main body 30 driven by the engine. As an example, in this embodiment, we will explain the case where the carbon dioxide emissions are calculated for an engine-driven generator that has a generator main body as the working machine main body 30 described above. However, the engine-driven working machines that are the target for calculating carbon dioxide emissions are not limited to the engine-driven generator described above, and can be of any type as long as they have a working machine main body that is driven by an engine, such as an engine-driven compressor that has a compressor main body as the working machine main body, or an engine-driven pump that has a pump.

[0047] In this embodiment, it is anticipated that the fuel used in these engine-driven work machines will be diesel, or one of the diesel alternative fuels selected from GTL fuel and B100 fuel, which will be selectively used depending on the situation. However, the types of fuel that can be selected are not limited to the above examples, and a greater or lesser range of fuels may be available for selection, and for example, B5 diesel, which is used as an alternative to diesel in the construction industry, may also be included.

[0048] In the above examples, "GTL fuel" is a diesel alternative fuel refined from natural gas, "B100 fuel" is a fuel that is 100% biodiesel fuel, and "B5 diesel" is diesel containing 5% or less biodiesel fuel.

[0049] [Basic Configuration of Carbon Dioxide Emission Calculation Device] FIG. 1 shows the basic configuration of a carbon dioxide emission calculation device 1 for an engine-driven working machine according to the present invention.

[0050] The carbon dioxide emission calculation device 1 shown in Figure 1 is equipped with a memory means 11, a fuel type identification means 12, an instantaneous fuel consumption amount acquisition means 13, an instantaneous emission amount calculation means 14, and an emission amount display means 15, which are realized in an electronic control device (control device 10) such as a microcontroller, as described below.

[0051] (1) Storage Means The storage means 11 stores the following information acquired in advance as information necessary for calculating the amount of carbon dioxide emissions:

[0052] (1-1) Emission coefficient The emission coefficient [kg / L] is a coefficient that represents the amount of carbon dioxide emitted [kg] per predetermined amount (for example, 1 L) of fuel that is intended to be used in the engine-driven work machine, in this embodiment, diesel, GTL fuel, and B100 fuel, and is stored as information necessary for calculating the instantaneous emission [g / sec], which is the amount of carbon dioxide emitted per unit time (for example, 1 second), calculated by the instantaneous emission calculation means 14 described later.

[0053] (1-2) Fuel consumption characteristics The fuel consumption characteristics define the correlation between the amount of fuel consumed per unit time (e.g., 1 second) [L] as instantaneous fuel consumption [L / sec] and the change in the load factor [%] of the engine-driven work machine's work machine body versus the change in instantaneous fuel consumption [L / sec] for each type of fuel (diesel, GTL fuel, and B100 fuel). Figure 2 shows an example of a graph of the fuel consumption characteristics for diesel, GTL fuel, and B100 fuel.

[0054] This fuel consumption characteristic is information required when the instantaneous fuel consumption obtained by the instantaneous fuel consumption obtaining means 13 described later is calculated based on the load rate [%] of the work machine main body 30 obtained by the load rate obtaining means 131 described later. When the instantaneous fuel consumption [L / sec] described later is obtained, for example, by actual measurement using a flow meter installed in the fuel supply system, or when it is obtained based on data obtained from the engine control unit (ECU), there is no need to store the above-mentioned fuel consumption characteristic in the memory means 11.

[0055] (1-3) Judgment Criteria The judgment criteria are stored data of judgment criteria values ​​(threshold values) necessary for the fuel type identification means 12 described below to identify the type of fuel based on a detection signal from the fuel type detection means 20 provided in the fuel supply system. In the configuration of this embodiment in which an ultrasonic sensor is used as the fuel type detection means 20 to identify the type of fuel based on differences in the ultrasonic propagation speed of the fuel, the upper and lower limit values ​​of the ultrasonic propagation speed for each fuel are stored in the storage means 11 as the above-mentioned judgment criteria.

[0056] However, the identification of the fuel type is not limited to identification using an ultrasonic sensor, but may also be performed using a capacitance sensor, a thermal conductivity sensor, etc., based on the differences in capacitance and thermal conductivity of each fuel.In this case, the upper and lower limit values ​​of the capacitance and the upper and lower limit values ​​of the thermal conductivity of each fuel are stored in the memory means 11 as the aforementioned judgment criteria.

[0057] Furthermore, two or more types of sensors may be provided as the fuel type detection means 20, and the fuel type may be identified based on a combination of multiple characteristics of the fuel.In this case, two or more types of judgment criteria (threshold values) data corresponding to the characteristics to be used in combination may be stored in the storage means 11.

[0058] (2) Fuel type identification means The fuel type identification means 12 is a means for identifying the type of fuel being used in the engine-driven work machine, and determines the type of fuel being used by comparing the detection signal received from the fuel type detection means 20 provided in the fuel supply system with the determination criteria stored in the aforementioned memory means 11.

[0059] In the embodiment shown in FIG. 1 , an ultrasonic sensor is provided as the fuel type detection means 20, and it is determined whether the fuel in use is diesel, GTL fuel, or B100 fuel based on the ultrasonic propagation speed of the fuel detected by the ultrasonic sensor. However, as described above, a capacitance sensor or a thermal conductivity sensor may be provided as the fuel type detection means 20, and the type of fuel may be determined based on differences in capacitance or thermal conductivity for each fuel. Furthermore, a plurality of types of sensors may be provided as the fuel type detection means 20, and the type of fuel may be determined based on a combination of detection signals from these sensors, thereby enabling more accurate determination of the type of fuel.

[0060] (3) Instantaneous fuel consumption acquisition means The instantaneous fuel consumption acquisition means 13 determines the fuel consumption per unit time (for example, 1 second) of the engine-driven work machine using a method described below, and acquires the determined fuel consumption per unit time as the instantaneous fuel consumption [L / sec] at the time the determination was made. The instantaneous fuel consumption acquisition means 13 may determine the fuel consumption per unit time based on actual measurements from a flow sensor provided in the fuel supply system or data from an engine control unit (ECU) provided in the engine, and acquire this as the instantaneous fuel consumption [L / sec] described above. However, in this embodiment, the instantaneous fuel consumption acquisition means 13 further includes a load factor acquisition means 131 and an instantaneous fuel consumption calculation means 132, which determine the fuel consumption per unit time based on calculations, and acquire the determined fuel consumption per unit time as the instantaneous fuel consumption [L / sec] described above.

[0061] (3-1) Load Factor Acquisition Means The load factor acquisition means 131 described above acquires the load factor [%] of the working machine main body 30 provided in the engine-driven working machine during operation, and in this embodiment where the working machine main body 30 is a generator main body, the load factor acquisition means 131 calculates and acquires the load factor [%] at the time of output of the generator main body (working machine main body 30) based on the output of the generator main body using the following formula: Load factor [%] = (output voltage × current × power factor) [kW] / rated value [kW]

[0062] The load factor acquisition means 131 may acquire the load factor by calculating the load factor of the work machine body 30 based on the operating state of the engine acquired from the ECU 35, for example, and is not limited to the above configuration.

[0063] (3-2) Instantaneous fuel consumption calculation means The instantaneous fuel consumption calculation means 132 calculates the instantaneous fuel consumption [L / sec], which is the fuel consumption per unit time, based on the fuel consumption characteristics corresponding to the type of fuel identified by the fuel type identification means 12 from the fuel consumption characteristics (see Figure 2) stored in the storage means 11 and the load factor [%] acquired by the load factor acquisition means 131.

[0064] As an example, assuming that the type of fuel identified by the fuel type identification means 12 is GTL fuel (the top graph in Figure 2), and the load factor of the work machine main body 30 acquired by the load factor acquisition means 131 is 60%, the instantaneous fuel consumption calculation means 132 calculates X [L / sec] (see Figure 2) as the instantaneous fuel consumption based on the function of the fuel consumption characteristics of GTL fuel stored in the storage means 11.

[0065] (4) Instantaneous emission amount calculation means The instantaneous emission amount calculation means 14 calculates the instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time, based on the emission coefficient [kg / L] corresponding to the type of fuel identified by the fuel type identification means 12, among the emission coefficients [kg / L] stored in the memory means 11, and the instantaneous fuel consumption amount [L / sec] acquired by the instantaneous fuel consumption acquisition means 13 (calculated by the instantaneous fuel consumption amount calculation means 132).

[0066] (5) Emission amount display means The emission amount display means 15 performs processing to display the instantaneous emission amount of carbon dioxide [g / sec] calculated by the instantaneous emission amount calculation means 14 on a display device 40 consisting of a monitor screen or the like provided on the instrument panel or the like of the engine-driven working machine.

[0067] The emission amount display means 15 may calculate the cumulative emission amount [g, kg, t], which is the cumulative value of the emission amount from a predetermined starting point to the point at which the latest instantaneous fuel consumption amount [L / sec] is obtained, together with the instantaneous emission amount [g / sec] calculated by the instantaneous emission amount calculation means 14, or instead of the instantaneous emission amount [g / sec], and display it on the display device 40.

[0068] In addition, the cumulative emissions [g, kg, t] may be calculated by accumulating the instantaneous emissions calculated by the instantaneous emissions calculation means 14 from a predetermined starting point to the time when the latest instantaneous fuel consumption [L / sec] was obtained, or the instantaneous fuel consumption [L / sec] obtained by the instantaneous fuel consumption acquisition means 13 described above may be accumulated from a predetermined starting point to the time when the latest instantaneous fuel consumption [L / sec] was obtained to obtain the cumulative fuel consumption, and this cumulative fuel consumption may be multiplied by the emission coefficient [L / sec] of the fuel currently in use, among the emission coefficients [kg / L] stored in the memory means 11, to obtain the cumulative emissions [g, kg, t].

[0069] This accumulated emission amount [g, kg, t] may be reset automatically at one or more timings, such as hourly, daily, weekly, monthly, etc., by user setting or automatically, and accumulation may be started from a new starting point, thereby making it possible to grasp the amount of carbon dioxide emission, for example, hourly, daily, weekly, monthly, etc.

[0070] (6) Operation, etc. The operation of the carbon dioxide emission calculation device 1 for an engine-driven working machine according to the present invention, which has been described above with reference to FIG. 1, will now be described with reference to FIG.

[0071] When the engine-driven working machine is started, the control device 10 executes a pre-stored program to activate the fuel type identification means 12 .

[0072] The fuel type identification means 12 compares the detection signal of the fuel type detection means (ultrasonic sensor) 20 with the judgment criteria stored in the memory means 11 to identify whether the fuel being used in the engine-driven working machine is diesel, GTL fuel, or B100 fuel, i.e., identify the fuel type (S101).

[0073] Based on this identification result, the instantaneous fuel consumption acquisition means 13 acquires the emission coefficient [kg / L] and fuel consumption characteristics of the type of fuel identified by the fuel type identification means from the memory means 11 (S102), and also activates the load factor acquisition means 131 to acquire the load factor [%] of the working machine main body 30 in operation (S103).

[0074] Then, the instantaneous fuel consumption acquisition means 13 further calculates the instantaneous fuel consumption [L / sec], which is the fuel consumption per unit time (for example, 1 second), based on the fuel consumption characteristics of the fuel in use acquired from the memory means 11 by the instantaneous fuel consumption calculation means 132 and the load rate [%] acquired by the load rate acquisition means 131 (S104).

[0075] In this way, when the instantaneous fuel consumption acquisition means 13 acquires the instantaneous fuel consumption [L / sec], the instantaneous emission amount calculation means 14 calculates the instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time, based on the emission coefficient [kg / L] of the type of fuel identified by the fuel type identification means 12, among the emission coefficients stored in the memory means 11, and the instantaneous fuel consumption [L / sec] acquired by the instantaneous fuel consumption acquisition means 13 (S105).

[0076] Once the instantaneous emission amount of carbon dioxide [g / sec] is calculated by the instantaneous emission amount calculation means 14 in this manner, the emission amount display means 15 performs processing to display the instantaneous emission amount calculated by the instantaneous emission amount calculation means 14 on a display device 40 such as a monitor screen provided on the instrument panel of the engine-driven working machine (S106).

[0077] The emission amount display means 15 may display on the display device 40, instead of or together with the instantaneous emission amount [g / sec], the cumulative emission amount [g, kg, t], which is the cumulative value of the carbon dioxide emission amount from a predetermined starting point to the point at which the latest instantaneous fuel consumption amount [L / sec] was obtained (S106), and in this embodiment, both the instantaneous emission amount [g / sec] and the cumulative emission amount [g, kg, t] can be displayed on the display device 40.

[0078] [Variant example of carbon dioxide emission calculation device] In the carbon dioxide emission calculation device 1 described above with reference to Figures 1 and 3, an example configuration has been described that makes it possible to calculate and display the "emission amount" of carbon dioxide emitted by an engine-driven work machine.

[0079] In contrast to this, FIGS. 4 and 5 show an example of the configuration of a carbon dioxide emission calculation device 1 that is capable of calculating and displaying not only the carbon dioxide "emission amount" but also the carbon dioxide "emission reduction amount."

[0080] In the configuration of the carbon dioxide emission calculation device 1 in FIG. 4, the same reference numerals are used for the means common to the carbon dioxide emission calculation device 1 in FIG.

[0081] In the flowchart shown in FIG. 5, the steps common to those in the flowchart shown in FIG. 3 are designated by the same step numbers (three-digit numbers beginning with S).

[0082] In the carbon dioxide emission calculation device 1 shown in FIG. 4, in addition to the means described with reference to FIG. 1, the control device 10 further realizes the following means.

[0083] (1) Reference instantaneous fuel consumption calculation means The reference instantaneous fuel consumption calculation means 16 calculates the reference instantaneous fuel consumption [L / sec], which is the instantaneous fuel consumption assuming that the fuel in use is diesel, based on the load rate [%] acquired by the load rate acquisition means 131 and the fuel consumption characteristics of diesel among the fuel consumption characteristics stored in the storage means 11.

[0084] (2) Reference instantaneous emission amount calculation means The reference instantaneous emission amount calculation means 17 calculates the reference instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time assuming that the fuel is light oil, based on the emission coefficient [kg / L] of light oil among the emission coefficients [kg / L] stored in the memory means 11 and the reference instantaneous fuel consumption amount [L / sec] calculated by the reference instantaneous fuel consumption amount calculation means 16.

[0085] (3) Instantaneous emission reduction calculation means The instantaneous emission reduction calculation means 18 calculates the difference between the reference instantaneous emission amount [g / sec] calculated by the reference instantaneous emission amount calculation means 17 and the instantaneous emission amount [g / sec] calculated by the instantaneous emission amount calculation means 14 as the instantaneous emission reduction amount [g / sec].

[0086] (4) Emission Reduction Amount Display Means The emission reduction amount display means 15' performs processing to display the instantaneous emission reduction amount [g / sec] calculated by the instantaneous emission reduction amount calculation means 18 on a display device 40 such as a monitor.

[0087] The emission reduction amount display means 15′ may calculate an accumulated emission reduction amount [g, kg, t], which is the accumulated value of the emission reduction amount [g / sec] from a predetermined starting point to the point at which the latest instantaneous fuel consumption amount [L / sec] was obtained, in addition to or instead of displaying the instantaneous emission reduction amount [g / sec] described above, and display the accumulated emission reduction amount [g, kg, t] on the display device 40.

[0088] As an example, the cumulative emission reduction amount [g, kg, t] can be calculated by accumulating the instantaneous emission reduction amount [g / sec] calculated by the instantaneous emission reduction amount calculation means 18 from a predetermined starting point to the most recently obtained instantaneous emission reduction amount [g / sec].

[0089] (5) Operation, etc. The operation of the carbon dioxide emission calculation device 1 described above with reference to FIG. 4 will now be described with reference to FIG.

[0090] When the engine-driven working machine is started, the fuel type identification means 12 in the control device 10 is activated to identify whether the fuel being used in the engine-driven working machine is diesel, GTL fuel, or B100 fuel (S101).

[0091] Based on this identification result, the instantaneous fuel consumption acquisition means 13 acquires from the storage means 11 the emission coefficient [kg / L] and fuel consumption characteristics corresponding to the type of fuel identified by the fuel type identification means (S102).

[0092] In parallel with this, the reference instantaneous fuel consumption calculation means 16 acquires the emission coefficient [kg / L] of diesel and the fuel consumption characteristics from the storage means 11 (S201).

[0093] The instantaneous fuel consumption obtaining means 13 further obtains the load rate [%] of the work machine body by the load rate obtaining means 131 (S103).

[0094] Thereafter, the instantaneous fuel consumption acquisition means 13 further determines the fuel consumption per unit time based on the fuel consumption characteristics of the fuel in use acquired from the storage means 11 by the instantaneous fuel consumption calculation means 132 and the load rate [%] acquired by the load rate acquisition means 131, and acquires the fuel consumption per unit time at the specified point in time as instantaneous fuel consumption [L / sec] (S104).

[0095] When the instantaneous fuel consumption [L / sec] is acquired by the instantaneous fuel consumption acquisition means 13 in this manner, the instantaneous emission amount calculation means 14 calculates the instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time, based on the instantaneous fuel consumption [L / sec] acquired by the instantaneous fuel consumption acquisition means 13 and the emission coefficient [kg / L] of the fuel in use acquired from the memory means 11 (S105).

[0096] On the other hand, the reference instantaneous fuel consumption calculation means 16 calculates the reference instantaneous fuel consumption [L / sec], which is the fuel consumption per unit time at the load rate [%] assuming that the fuel is diesel, based on the load rate [%] acquired by the load rate acquisition means 131 and the fuel consumption characteristics of diesel acquired from the memory means 11 (S202).

[0097] In addition, the standard instantaneous emission amount calculation means 17 calculates the standard instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time assuming that the fuel is diesel, based on the standard instantaneous fuel consumption amount [L / sec] calculated by the standard instantaneous fuel consumption amount calculation means 16 and the diesel emission coefficient [kg / L] obtained from the memory means 11 (S203).

[0098] In this way, the instantaneous emission amount [g / sec] is calculated by the instantaneous emission amount calculation means 14, and the reference instantaneous emission amount [g / sec] is calculated by the reference instantaneous emission amount calculation means 17. Then, the difference between the reference instantaneous emission amount [g / sec] and the instantaneous emission amount [g / sec] is calculated as the instantaneous emission reduction amount [g / sec] by the instantaneous emission amount calculation means 18 (S204).

[0099] The instantaneous emission amount of carbon dioxide [g / sec] calculated by the instantaneous emission amount calculation means 14, preferably the instantaneous emission amount [g / sec], together with the separately calculated cumulative emission amount [g, kg, t], are displayed on a display device 40 such as a monitor screen by the emission amount display means 15, and the instantaneous emission reduction amount [g / sec] calculated by the instantaneous emission reduction amount calculation means 18, preferably the instantaneous emission reduction amount [g / sec], together with the separately calculated cumulative emission reduction amount [g, kg, t], are displayed on a display device 40 such as a monitor screen by the emission reduction amount display means 15′ (S205), and the processing is completed.

[0100] [Other Modified Examples] In the embodiment described above with reference to Figures 4 and 5, a standard instantaneous fuel consumption rate [L / sec], which is the fuel consumption rate per unit time when the fuel is assumed to be diesel, is calculated, and the standard instantaneous emission amount [g / sec] is obtained by multiplying this standard instantaneous fuel consumption rate [L / sec] by the emission coefficient of diesel [kg / L].Furthermore, the difference between this standard instantaneous emission amount [g / sec] and the instantaneous emission amount [g / sec] is calculated as the instantaneous emission reduction amount [g / sec].

[0101] In contrast to this, in the embodiment shown in Figures 6 and 7, the difference between the emission coefficient [kg / L] of light oil among the emission coefficients [kg / L] stored in the memory means 11 and the emission coefficient [kg / L] of the fuel identified by the fuel type identification means 12 is calculated as a reduction coefficient [kg / L], and the value obtained by multiplying the instantaneous fuel consumption [L / sec] acquired by the instantaneous fuel consumption acquisition means 13 by the aforementioned reduction coefficient [kg / L] is obtained as the instantaneous emission reduction amount [g / sec].

[0102] In the configuration of the carbon dioxide emission calculation device 1 in FIG. 6, the same reference numerals are used for means common to the carbon dioxide emission calculation device 1 in FIG.

[0103] In the flowchart shown in FIG. 7, the steps common to those in the flowchart shown in FIG. 5 use the same step numbers (three-digit numbers beginning with S).

[0104] As is clear from a comparison between FIG. 4 and FIG. 6, the carbon dioxide emission calculation device 1 shown in FIG. 6 has the following changes in configuration compared to the carbon dioxide emission display device 1 shown in FIG.

[0105] The carbon dioxide emission amount display device 1 shown in Figure 4 is provided with a reference instantaneous fuel consumption calculation means 16 and a reference instantaneous emission amount calculation means 17, whereas the carbon dioxide emission amount calculation device 1 shown in Figure 6 does not have the reference instantaneous fuel consumption calculation means 16 or the reference instantaneous emission amount calculation means 17, and instead is provided with a reduction coefficient calculation means 19, which calculates the reduction coefficient [kg / L] as the difference between the emission coefficient [kg / L] of diesel among the emission coefficients [kg / L] stored in the memory means 11 and the emission coefficient [kg / L] of the fuel identified by the fuel type identification means 12 (see S301 in Figure 7).

[0106] Furthermore, in the carbon dioxide emission calculation device 1 shown in Figure 4, the instantaneous emission reduction calculation means 18 is configured to calculate the difference between the reference instantaneous emission amount [g / sec] calculated by the reference instantaneous emission amount calculation means 17 and the instantaneous emission amount [g / sec] calculated by the instantaneous emission amount calculation means 14 as the instantaneous emission reduction amount [g / sec], whereas the instantaneous emission reduction calculation means 18' of the carbon dioxide emission calculation device 1 shown in Figure 6 differs in that it multiplies the instantaneous fuel consumption [L / sec] obtained by the instantaneous fuel consumption acquisition means 13 (calculated by the instantaneous fuel consumption calculation means 132) by the reduction coefficient [kg / L] calculated by the reduction coefficient calculation means 19 to calculate the instantaneous emission reduction amount [g / sec] (see S302 in Figure 7).

[0107] Other points are the same as those in the embodiment described above with reference to FIGS. 4 and 5, and therefore description thereof will be omitted.

[0108] DESCRIPTION OF SYMBOLS 1 Carbon dioxide emission calculation device 10 Control device (electronic control device) 11 Storage means 12 Fuel type identification means 13 Instantaneous fuel consumption acquisition means 131 Load factor acquisition means 132 Instantaneous fuel consumption calculation means 14 Instantaneous emission calculation means 15 Emission amount display means 15' Emission reduction amount display means 16 Reference instantaneous fuel consumption calculation means 17 Reference instantaneous emission calculation means 18, 18' Instantaneous emission reduction calculation means 19 Reduction coefficient calculation means 20 Fuel type detection means (ultrasonic sensor) 30 Work machine body 35 ECU 40 Display device

Claims

1. A method for calculating carbon dioxide emissions from an engine-driven working machine which is equipped with a diesel engine and a working machine body driven by the engine and which is operated using one type of fuel selected from diesel and diesel alternative fuels, comprising: a memory means for storing an emission coefficient, which is the amount of carbon dioxide emitted per specified amount of fuel, acquired in advance for each type of usable fuel, and a judgment criterion necessary for determining the type of fuel; a fuel type identification process for identifying the type of fuel being used by comparing a detection signal from a fuel type detection means provided at any position in the fuel supply system with the judgment criterion stored in the memory means; an instantaneous fuel consumption acquisition process for identifying the amount of fuel consumed per unit time and acquiring it as the instantaneous fuel consumption at the specified point in time; and an instantaneous emission calculation process for calculating the instantaneous emission amount, which is the amount of carbon dioxide emitted per unit time, based on the emission coefficient of the type of fuel identified in the fuel type identification process and the instantaneous fuel consumption, among the emission coefficients stored in the memory means.

2. The carbon dioxide emissions calculation method for an engine-driven working machine as described in claim 1, characterized in that the memory means stores, as a fuel consumption characteristic, a correspondence relationship between a change in instantaneous fuel consumption and a change in load factor of the working machine body for each type of usable fuel, which has been acquired in advance, and the instantaneous fuel consumption acquisition process further includes: a load rate acquisition process for acquiring the load rate of the working machine body; and an instantaneous fuel consumption calculation process for calculating the instantaneous fuel consumption based on the fuel consumption characteristics of the type of fuel identified in the fuel type identification process from the fuel consumption characteristics stored in the memory means and the load rate acquired in the load rate acquisition process.

3. A method for calculating carbon dioxide emissions from an engine-driven working machine as described in claim 2, further comprising: a process for calculating a standard instantaneous fuel consumption amount, which is the instantaneous fuel consumption amount assuming that the fuel in use is light oil, based on the load rate acquired in the load rate acquisition process and the fuel consumption characteristics of light oil among the fuel consumption characteristics stored in the storage means; a process for calculating a standard instantaneous emission amount, which is the amount of carbon dioxide emission per unit time assuming that the fuel is light oil, based on the emission coefficient of light oil among the emission coefficients stored in the storage means and the standard instantaneous fuel consumption amount; and a process for calculating the difference between the standard instantaneous emission amount and the instantaneous emission amount as an instantaneous emission reduction amount, which is the amount of carbon dioxide emission reduction per unit time.

4. A method for calculating carbon dioxide emissions from an engine-driven working machine as described in claim 2, further comprising: a process for calculating, as a reduction coefficient, the difference between the emission coefficient of diesel among the emission coefficients stored in the memory means and the emission coefficient of the type of fuel identified in the fuel type identification process; and a process for calculating, as an instantaneous emission reduction amount, which is the amount of carbon dioxide emission reduction per unit time, a value obtained by multiplying the instantaneous fuel consumption acquired in the instantaneous fuel consumption acquisition process by the reduction coefficient.

5. A method for calculating carbon dioxide emissions from an engine-driven working machine as described in any one of claims 1 to 4, further comprising an emission display process for displaying on a display device the instantaneous emission amount acquired in the instantaneous emission acquisition process and / or an accumulated emission amount, which is the accumulated value of the carbon dioxide emission amount from a specified starting point to the point at which the latest instantaneous fuel consumption amount was acquired.

6. A method for calculating carbon dioxide emissions from an engine-driven working machine as described in claim 3 or 4, further comprising an emission reduction display process for displaying on a display device the instantaneous emission reduction calculated in the instantaneous emission reduction calculation process and / or an accumulated emission reduction, which is the accumulated value of the emission reduction from a specified starting point to the point at which the latest instantaneous fuel consumption is obtained.

7. A carbon dioxide emission calculation device for an engine-driven working machine that has a diesel engine and a working machine body driven by the engine and is operated using one type of fuel selected from diesel and diesel alternative fuel, comprising: a memory means for storing an emission coefficient, which is the amount of carbon dioxide emission per specified amount of fuel, acquired in advance for each type of usable fuel, and a judgment criterion required for determining the type of fuel; a fuel type identification means for identifying the type of fuel being used by comparing a detection signal from a fuel type detection means provided at any position in the fuel supply system with the judgment criterion stored in the memory means; an instantaneous fuel consumption acquisition means for identifying the fuel consumption per unit time and acquiring it as the instantaneous fuel consumption at the specified point in time; and an instantaneous emission calculation means for calculating an instantaneous emission amount, which is the amount of carbon dioxide emission per unit time, based on the emission coefficient of the type of fuel identified by the fuel type identification means and the instantaneous fuel consumption amount, from the emission coefficients stored in the memory means.

8. The carbon dioxide emission calculation device for an engine-driven working machine as described in claim 7, characterized in that the memory means stores a correspondence relationship between a change in instantaneous fuel consumption and a change in load factor of the working machine body for each type of usable fuel, which has been acquired in advance, as a fuel consumption characteristic, and the instantaneous fuel consumption acquisition means further includes: a load factor acquisition means for acquiring the load factor of the working machine body; and an instantaneous fuel consumption calculation means for calculating the instantaneous fuel consumption based on the fuel consumption characteristics of the type of fuel identified by the fuel type identification means from the fuel consumption characteristics stored in the memory means and the load factor acquired by the load factor acquisition means.

9. A carbon dioxide emission calculation device for an engine-driven working machine as described in claim 8, further comprising: a standard instantaneous fuel consumption calculation means for calculating a standard instantaneous fuel consumption, which is the instantaneous fuel consumption amount assuming that the fuel in use is light oil, based on the load rate acquired by the load rate acquisition means and the fuel consumption characteristics of light oil among the fuel consumption characteristics stored in the memory means; a standard instantaneous emission amount calculation means for calculating a standard instantaneous emission amount, which is the amount of carbon dioxide emission per unit time assuming that the fuel is light oil, based on the emission coefficient of light oil among the emission coefficients stored in the memory means and the standard instantaneous fuel consumption amount calculated by the standard instantaneous fuel consumption calculation means; and an instantaneous emission reduction amount calculation means for calculating the difference between the standard instantaneous emission amount calculated by the standard instantaneous emission amount calculation means and the instantaneous emission amount calculated by the instantaneous emission amount calculation means as an instantaneous emission reduction amount, which is the amount of carbon dioxide emission reduction per unit time.

10. A carbon dioxide emission calculation device for an engine-driven working machine as described in claim 7, further comprising: a reduction coefficient calculation means for calculating the difference between the emission coefficient of diesel among the emission coefficients stored in the memory means and the emission coefficient of the type of fuel identified by the fuel type identification means as a reduction coefficient; and an instantaneous emission reduction calculation means for calculating an instantaneous emission reduction amount, which is the amount of carbon dioxide emission reduction per unit time, by multiplying the instantaneous fuel consumption acquired by the instantaneous fuel consumption acquisition means by the reduction coefficient calculated by the reduction coefficient calculation means.

11. A carbon dioxide emission calculation device for an engine-driven working machine as described in any one of claims 7 to 10, further comprising an emission display means for displaying on a display device the instantaneous emission amount calculated by the instantaneous emission calculation means and / or an accumulated emission amount, which is the accumulated value of the carbon dioxide emission amount from a specified starting point to the point in time when the latest instantaneous fuel consumption amount is obtained.

12. A carbon dioxide emission calculation device for an engine-driven working machine as described in claim 9 or 10, further comprising an emission reduction display means for displaying on a display device the instantaneous emission reduction calculated by the instantaneous emission reduction calculation means and / or an accumulated emission reduction, which is the accumulated value of the emission reduction from a specified starting point to the point at which the latest instantaneous fuel consumption is obtained.

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